技术领域Technical field
本发明涉及多相流分流技术领域，尤其涉及一种具有预分离功能的气液聚结滤芯。The present invention relates to the technical field of multi-phase flow splitting, and in particular to a gas-liquid coalescing filter element with a pre-separation function.
背景技术Background technique
气液过滤广泛应用于各种工业过程，例如天然气净化及管道输送、压缩空气过滤、干气密封和燃料气过滤。比如，天然气处理及长距离输送过程中夹带的液体杂质，会造成计量仪器及压缩机组损坏、干气密封失效、管道腐蚀及磨损，因此需要设置相应的气液过滤装置(比如聚结过滤器)去除天然气中的液体杂质，其中，微小的液滴主要靠聚结过滤器的聚结滤芯的聚结分离作用进行去除。Gas-liquid filtration is widely used in various industrial processes, such as natural gas purification and pipeline transportation, compressed air filtration, dry gas sealing and fuel gas filtration. For example, liquid impurities entrained during natural gas processing and long-distance transportation can cause damage to measuring instruments and compressor units, failure of dry gas seals, and pipeline corrosion and wear. Therefore, corresponding gas-liquid filtration devices (such as coalescing filters) need to be installed. To remove liquid impurities in natural gas, the tiny droplets are mainly removed by the coalescing and separation effect of the coalescing filter element of the coalescing filter.
现场输气管道中天然气所含杂质较为复杂、工况变化较大、含液量波动较大，液体杂质主要有凝析油、游离水及经过中间设置的压气站压缩机组后会夹带润滑油等高粘度液滴。当现场处于高浓度、大粒径液滴工况时，现有聚结滤芯处理量无法满足要求，杂质将快速堵塞滤芯，导致滤芯失效，而且气流中夹带的高粘度液滴被聚结滤芯捕集后在纤维内部难以及时排出，导致滤芯压降迅速增加，液滴二次夹带(聚结过滤器已经捕集的液滴由于气流的作用会再次进入下游气流，从而引起下游气流中液滴浓度的增加，导致过滤效率下降，这种现象称为二次夹带，在微米级液滴中非常容易出现)也将增加。The impurities contained in natural gas in on-site gas transmission pipelines are relatively complex, the working conditions change greatly, and the liquid content fluctuates greatly. The liquid impurities mainly include condensate, free water, and lubricating oil that will be entrained after passing through the compressor unit of the compressor station installed in the middle. High viscosity droplets. When the site is in the working condition of high concentration and large particle size droplets, the processing capacity of the existing coalescing filter element cannot meet the requirements. Impurities will quickly block the filter element, causing the filter element to fail. Moreover, the high viscosity droplets entrained in the air flow are captured by the coalescing filter element. After being collected, it is difficult to discharge it in time inside the fiber, resulting in a rapid increase in the pressure drop of the filter element and secondary entrainment of droplets (droplets already captured by the coalescing filter will re-enter the downstream airflow due to the action of the airflow, thus causing the concentration of droplets in the downstream airflow. The increase will lead to a decrease in filtration efficiency. This phenomenon is called secondary entrainment, which is very easy to occur in micron-sized droplets.) will also increase.
因此，现有聚结滤芯无法处理现场含液量波动较大、来流中含有高粘度液体杂质等复杂情况。为保证核心设备正常运行，沿途各压气站一般会设置惯性分离器、旋风分离器、过滤分离器和聚结分离器组合的多级分离器，虽然其处理量大，可以应对复杂工况，但存在成本高、占地面积大、整体结构及工艺流程复杂、不易安装操作等缺点。Therefore, the existing coalescing filter element cannot handle complex situations such as large fluctuations in on-site liquid content and high-viscosity liquid impurities in the incoming flow. In order to ensure the normal operation of core equipment, compressor stations along the route are generally equipped with multi-stage separators that combine inertial separators, cyclone separators, filter separators and coalescing separators. Although they have a large processing capacity and can cope with complex working conditions, It has the disadvantages of high cost, large floor space, complex overall structure and process flow, and difficulty in installation and operation.
现有技术中提供一种多级过滤元件(美国发明专利US8936661B2)，参见图1，该多级过滤元件主要包括：管状过滤器引导件、外预过滤器套筒元件、内过滤器元件的第一级和第二级等元件组成；流体穿过外部预滤器套筒元件，进入到内过滤器元件内，然后穿过内部过滤器元件的第一级，通过管状过滤器引导件进入到第二级，并在第三过滤步骤中向外穿过内部元件。该发明将三级过滤元件组件集合到一个过滤元件上，可以分级去除流体中各种不同的杂质。The prior art provides a multi-stage filter element (US invention patent US8936661B2), see Figure 1. The multi-stage filter element mainly includes: a tubular filter guide, an outer pre-filter sleeve element, and an inner filter element. The fluid passes through the outer pre-filter sleeve element, enters the inner filter element, then passes through the first stage of the inner filter element, and enters the second stage through the tubular filter guide. stage, and outward through the internal elements in a third filtration step. This invention integrates three-stage filter element components into one filter element, which can remove various impurities in the fluid in stages.
但是，该多级过滤元件没有对滤芯内部空间进行合理利用，占地空间较大，同时，该多级过滤元件采用多孔介质作为预分离元件，将三级过滤元件组件集合到一个过滤元件上，当气流中含有高粘度液体杂质等复杂工况，杂质附着在多孔介质内部不易排出，将堵塞多孔介质，造成压降急剧升高，导致滤芯寿命减小，需频繁更换。However, this multi-stage filter element does not make reasonable use of the internal space of the filter element and occupies a large space. At the same time, this multi-stage filter element uses porous media as a pre-separation element, and integrates the three-stage filter element components into one filter element. When the air flow contains high-viscosity liquid impurities and other complex working conditions, the impurities adhere to the inside of the porous media and are difficult to discharge, which will block the porous media, causing a sharp increase in pressure drop, resulting in a reduction in the life of the filter element and the need for frequent replacement.
现有技术中还提供一种高效过滤聚结集成滤芯(中国发明专利CN107930185A)，参见图2，该高效过滤聚结集成滤芯包括压紧装置、集成压盖、预过滤体、聚结体和集成端盖，预过滤体和聚结体通过压紧装置、集成压盖和集成端盖连接组合为一个集成体。The prior art also provides a high-efficiency filtration and coalescing integrated filter element (Chinese invention patent CN107930185A). See Figure 2. The high-efficiency filtration and coalescing integrated filter element includes a pressing device, an integrated gland, a pre-filter body, a coalescing body and an integrated filter element. The end cap, pre-filter body and coalescing body are connected and combined into an integrated body through a pressing device, an integrated gland and an integrated end cap.
该高效过滤聚结集成滤芯由过滤体和聚结体通过一定结构组合而成，延长了滤芯使用寿命，成本低，占用空间小。但是，该高效过滤聚结集成滤芯依旧采用多孔介质作为预分离元件，当气流中含有高粘度液体杂质等复杂工况，杂质附着在多孔介质内部不易排出，将堵塞多孔介质，造成压降急剧升高，导致滤芯寿命减小，需频繁更换。The high-efficiency filtration coalescing integrated filter element is composed of a filter body and a coalescing body through a certain structure, which extends the service life of the filter element, has low cost and takes up little space. However, this high-efficiency filtration coalescing integrated filter element still uses porous media as the pre-separation element. When the air flow contains complex working conditions such as high-viscosity liquid impurities, the impurities adhere to the inside of the porous media and are difficult to discharge, which will block the porous media and cause a sharp increase in pressure drop. High, resulting in reduced filter element life and the need for frequent replacement.
发明内容Contents of the invention
有鉴于此，本发明提供一种具有预分离功能的气液聚结滤芯，通过在滤芯内骨架所限定的空间中设置导流装置和导流通道，能有效利用滤芯内部空间，占用空间小，并且解决当气流中含有高粘度液体杂质等复杂工况，杂质附着在多孔介质内部不易排出，将堵塞多孔介质，造成压降急剧升高，导致滤芯寿命减小，需频繁更换的问题，并且适于现场含液量波动较大、来流中含有高粘度液体杂质等复杂情况，并有效减少液滴二次夹带现象。In view of this, the present invention provides a gas-liquid coalescing filter element with a pre-separation function. By arranging a flow guide device and a flow guide channel in the space limited by the inner frame of the filter element, the internal space of the filter element can be effectively utilized and the space occupied is small. It also solves the problem of complicated working conditions such as high-viscosity liquid impurities in the air flow. The impurities adhere to the inside of the porous medium and are not easily discharged. They will block the porous medium, causing a sharp increase in pressure drop, resulting in a reduction in the life of the filter element and the need for frequent replacement. It is also suitable for It can effectively reduce the secondary entrainment of droplets in complex situations such as large fluctuations in on-site liquid content and high-viscosity liquid impurities in the incoming flow.
为了实现上述目的，本发明采用如下技术方案：In order to achieve the above objects, the present invention adopts the following technical solutions:
一种具有预分离功能的气液聚结滤芯，包括：滤芯内骨架、滤芯聚结层、滤芯排液层、滤芯外骨架、滤芯上端盖、滤芯下端盖、导流装置以及导流通道；A gas-liquid coalescing filter element with a pre-separation function, including: an inner frame of the filter element, a coalescing layer of the filter element, a drainage layer of the filter element, an outer frame of the filter element, an upper end cover of the filter element, a lower end cover of the filter element, a diversion device and a diversion channel;
该滤芯内骨架、滤芯聚结层、滤芯排液层、滤芯外骨架由内向外依次套设，且均为柱形结构；The inner frame of the filter element, the coalescence layer of the filter element, the drainage layer of the filter element, and the outer frame of the filter element are arranged in sequence from the inside to the outside, and they are all cylindrical structures;
该滤芯上端盖设置在该滤芯外骨架的上端，滤芯下端盖设置在该滤芯外骨架的下端；The upper end cover of the filter element is arranged on the upper end of the outer frame of the filter element, and the lower end cover of the filter element is arranged on the lower end of the outer frame of the filter element;
该滤芯下端盖上设置进气口；An air inlet is provided on the lower end cover of the filter element;
该进气口处设置导流装置，用于使进入滤芯的气体产生旋转气流；A flow guide device is provided at the air inlet to generate a rotating airflow for the gas entering the filter element;
该导流通道设置于该滤芯内骨架内部，并连接该导流装置。The flow guide channel is arranged inside the inner frame of the filter element and connected to the flow guide device.
进一步地，该导流装置采用轴向导流叶片。Further, the flow guide device adopts axial guide vanes.
进一步地，该导流通道壁面设有弧形排液槽，该气体在离心力的作用下分离出液滴，该液滴在该旋转气流的作用下运动到该弧形排液槽，沿该弧形排液槽向下排出。Furthermore, the wall of the diversion channel is provided with an arc-shaped drainage groove. The gas separates liquid droplets under the action of centrifugal force. The droplets move to the arc-shaped drainage groove under the action of the rotating air flow. The liquid drain groove is discharged downward.
进一步地，该导流通道侧面设有斜缝，该斜缝由该导流通道外侧向内侧的倾斜方向与该旋转气流的流动方向的夹角小于90度。Further, an oblique slit is provided on the side of the guide channel, and the angle between the inclination direction of the oblique slit from the outside to the inside of the guide channel and the flow direction of the rotating airflow is less than 90 degrees.
进一步地，该导流通道上端设有喇叭口，用于导流扩散该旋转气流。Further, a bell mouth is provided at the upper end of the guide channel for guiding and diffusing the rotating airflow.
进一步地，该滤芯内骨架开有通孔，该通孔的出口处设置第一导流槽。Further, the inner frame of the filter element is provided with a through hole, and a first guide groove is provided at the outlet of the through hole.
进一步地，该通孔沿气流方向倾斜设置。Further, the through hole is arranged obliquely along the air flow direction.
进一步地，该滤芯内骨架的内壁面设有排液槽，该旋转气流在该滤芯内骨架和该导流通道之间的空间旋转流动时，在离心力的作用下分离出的液滴沿该排液槽向下排出。Further, the inner wall surface of the inner frame of the filter element is provided with a liquid drainage groove. When the rotating airflow rotates in the space between the inner frame of the filter element and the guide channel, the liquid droplets separated under the action of centrifugal force move along the drainage groove. The liquid tank is discharged downward.
进一步地，该滤芯内骨架的内壁面设有弧形结构，在该弧形结构两侧开有通孔，该通孔的出口处设置第二导流槽。Further, the inner wall surface of the inner frame of the filter element is provided with an arc-shaped structure, through holes are opened on both sides of the arc-shaped structure, and a second guide groove is provided at the outlet of the through hole.
进一步地，在该滤芯内骨架内壁面、通孔上方设置斜挡板钩。Further, an inclined baffle hook is provided on the inner wall surface of the inner frame of the filter element and above the through hole.
进一步地，该滤芯外骨架上设有流通孔，该滤芯外骨架内壁面流通孔位置设有第三导流槽。Further, the outer frame of the filter element is provided with a flow hole, and the inner wall surface of the outer frame of the filter element is provided with a third guide groove at the position of the flow hole.
本发明提供的具有预分离功能的气液聚结滤芯，其内的该滤芯内骨架、滤芯聚结层、滤芯排液层、滤芯外骨架由内向外依次套置，且均为柱形结构；该滤芯上端盖设置在该滤芯外骨架的上端，滤芯下端盖设置在该滤芯外骨架的下端；该滤芯下端盖上设置进气口；该进气口处设置导流装置，用于使进入滤芯的气体产生旋转气流；该导流通道设置于该滤芯内骨架的内部并连接该导流装置；该旋转气流在该导流通道内流动时，在离心力的作用下分离出液滴并甩到该导流通道壁面并在重力作用下向下排出。The present invention provides a gas-liquid coalescing filter element with a pre-separation function, in which the inner frame of the filter element, the coalescing layer of the filter element, the liquid drainage layer of the filter element, and the outer frame of the filter element are nested in sequence from the inside to the outside, and are all cylindrical structures; The upper end cover of the filter element is arranged on the upper end of the outer frame of the filter element, and the lower end cover of the filter element is arranged on the lower end of the outer frame of the filter element; an air inlet is provided on the lower end cover of the filter element; a flow guide device is provided at the air inlet for allowing the air to enter the filter element. The gas generates a rotating air flow; the flow guide channel is arranged inside the inner frame of the filter element and connected to the flow guide device; when the rotating air flow flows in the flow guide channel, the liquid droplets are separated under the action of centrifugal force and thrown to the The wall of the diversion channel is discharged downward under the action of gravity.
首先，通过在滤芯内骨架所限定的空间中设置导流装置和导流通道，能有效利用滤芯内部空间，结构紧凑，占用空间小，节省空间50％以上，且便于拆装。First of all, by arranging the flow guide device and the flow guide channel in the space limited by the inner frame of the filter element, the internal space of the filter element can be effectively utilized, the structure is compact, the space occupied is small, the space is saved by more than 50%, and the disassembly and assembly are easy.
其次，通过在进气口处设置导流装置，使进入滤芯的气体产生旋转气流，导流通道为旋转气流提供一定的分离空间(或称流通空间)，使得旋转气流中夹带的液滴在离心力的作用下分离出来并甩到导流通道的内壁，内壁上的液滴汇聚在一起，在重力作用下向下流动及时排除，有效滤除了气体中的液滴，满足处理量要求。Secondly, by setting up a flow guide device at the air inlet, the gas entering the filter element generates a rotating air flow. The flow guide channel provides a certain separation space (or flow space) for the rotating air flow, so that the liquid droplets entrained in the rotating air flow are separated by centrifugal force. Under the action of gravity, they are separated and thrown to the inner wall of the diversion channel. The droplets on the inner wall gather together and flow downward under the action of gravity to be eliminated in time, effectively filtering out the droplets in the gas and meeting the processing capacity requirements.
再者，旋转气流流动到滤芯上端盖后，受到该滤芯上端盖的阻挡，旋转向下并扩散至导流装置与滤芯内骨架之间的空间内，旋转向下流动，即改变了气流沿内骨架的流动方向，该旋转向下的气流在离心力和惯性的作用下，分离出气流中液滴，并在向下的气流作用下，沿内骨架内壁向下排出，气流经滤芯内骨架流入滤芯聚结层(也可称为滤芯纤维层)，气体中的剩余少量液滴随气流进入滤芯聚结层，由滤芯聚结层聚结成大液滴，在气流的作用下流至排液层，在排液层中向下排出，经过过滤的气体通过滤芯外骨架向外流出，以此实现多级过滤，过滤效果好。高粘度液滴进入聚结层之前在离心力和惯性力作用下能够及时分离排出，而聚结层吸收的少量液滴运动到排液层由向下气流的作用下及时排出，滤芯聚结层仅需吸收剩余少量液滴，防止杂质将其堵塞，气流中夹带的高粘度液滴能够及时排出，并且能有效减少液滴二次夹带。Furthermore, after the rotating airflow flows to the upper end cover of the filter element, it is blocked by the upper end cover of the filter element, rotates downward and diffuses into the space between the flow guide device and the inner frame of the filter element, and rotates downward to flow, which changes the airflow along the inner In the flow direction of the skeleton, the rotating downward airflow separates the droplets in the airflow under the action of centrifugal force and inertia, and is discharged downward along the inner wall of the inner skeleton under the action of the downward airflow. The airflow flows into the filter element through the inner skeleton of the filter element. The coalescing layer (also called the filter element fiber layer), the remaining small amount of droplets in the gas enters the filter element coalescing layer with the air flow, and is coalesced into large droplets by the filter element coalescing layer, and flows to the drainage layer under the action of the air flow. It is discharged downward in the liquid drainage layer, and the filtered gas flows out through the outer frame of the filter element, thereby achieving multi-stage filtration and good filtration effect. High-viscosity liquid droplets can be separated and discharged in time under the action of centrifugal force and inertial force before entering the coalescing layer, and a small amount of liquid droplets absorbed by the coalescing layer move to the drainage layer and are discharged in time under the action of downward airflow. The coalescing layer of the filter element only It is necessary to absorb the remaining small amount of droplets to prevent impurities from clogging them. High-viscosity droplets entrained in the air flow can be discharged in time, and can effectively reduce secondary entrainment of droplets.
本发明有效利用滤芯内部空间设置导流装置及通道而不是多孔介质预分离部分液滴、导流促进排液的思路，设计出的滤芯可应对含液量波动以及粘性杂质工况、及时将捕获的液滴排出、延长滤芯使用寿命，防止更换滤芯时停机影响正常生产，可在不增加站场装置的基础上满足处理量要求，又具有成本低、结构紧凑、节省空间、便于拆装等优点。This invention effectively utilizes the internal space of the filter element to set up diversion devices and channels instead of porous media to pre-separate some droplets and guide the flow to promote liquid drainage. The designed filter element can cope with fluctuations in liquid content and working conditions of viscous impurities, and capture them in a timely manner. It can effectively discharge droplets, extend the service life of the filter element, and prevent shutdowns from affecting normal production when replacing the filter element. It can meet the processing capacity requirements without increasing the station equipment, and has the advantages of low cost, compact structure, space saving, and easy disassembly and assembly. .
为让本发明的上述和其他目的、特征和优点能更明显易懂，下文特举较佳实施例，并配合所附图式，作详细说明如下。In order to make the above and other objects, features and advantages of the present invention more clearly understood, preferred embodiments are described in detail below along with the accompanying drawings.
附图说明Description of the drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。在附图中：In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are: For some embodiments of the present application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts. In the attached picture:
图1为现有多级过滤元件的结构示意图；Figure 1 is a schematic structural diagram of an existing multi-stage filter element;
图2为现有高效过滤聚结集成滤芯的结构示意图；Figure 2 is a schematic structural diagram of an existing high-efficiency filtration coalescing integrated filter element;
图3为本发明实施例具有预分离功能的气液聚结滤芯的结构示意图；Figure 3 is a schematic structural diagram of a gas-liquid coalescing filter element with pre-separation function according to an embodiment of the present invention;
图4为本发明实施例具有预分离功能的气液聚结滤芯中导流装置1的结构示意图；Figure 4 is a schematic structural diagram of the flow guide device 1 in the gas-liquid coalescence filter element with pre-separation function according to the embodiment of the present invention;
图5为本发明实施例具有预分离功能的气液聚结滤芯中导流通道2的立体图；Figure 5 is a perspective view of the flow guide channel 2 in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention;
图6为本发明实施例具有预分离功能的气液聚结滤芯中导流通道2的截面图；Figure 6 is a cross-sectional view of the flow guide channel 2 in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention;
图7a为本发明实施例具有预分离功能的气液聚结滤芯中一种滤芯内骨架的局部结构示意图；Figure 7a is a partial structural schematic diagram of the inner skeleton of a filter element in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention;
图7b为图7a中滤芯内骨架的平面图；Figure 7b is a plan view of the inner frame of the filter element in Figure 7a;
图8为本发明实施例具有预分离功能的气液聚结滤芯中另一种滤芯内骨架的局部结构示意图；Figure 8 is a partial structural schematic diagram of another filter element inner skeleton in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention;
图9为本发明实施例具有预分离功能的气液聚结滤芯中滤芯外骨架的局部结构示意图；Figure 9 is a partial structural diagram of the outer frame of the filter element in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention;
图10示出了采用本发明实施例具有预分离功能的气液聚结滤芯与使用传统滤芯的过程压降对比曲线；Figure 10 shows the process pressure drop comparison curve using a gas-liquid coalescing filter element with a pre-separation function according to an embodiment of the present invention and using a traditional filter element;
图11示出了采用本发明实施例具有预分离功能的气液聚结滤芯与使用传统滤芯的过滤效率对比曲线。Figure 11 shows a comparison curve of filtration efficiency using a gas-liquid coalescing filter element with a pre-separation function according to an embodiment of the present invention and using a traditional filter element.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of this application.
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。It should be noted that the terms "comprising" and "having" and any variations thereof in the description and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusion, for example, a series of steps or units. The processes, methods, systems, products or devices are not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to the processes, methods, products or devices.
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
当现场处于高浓度、大粒径液滴工况时，现有的气液聚结滤芯处理量无法满足要求，杂质将快速堵塞滤芯，导致滤芯失效，而且气流中夹带的高粘度液滴被聚结滤芯捕集后在纤维内部难以及时排出，导致滤芯压降迅速增加，液滴二次夹带(聚结过滤器已经捕集的液滴由于气流的作用会再次进入下游气流，从而引起下游气流中液滴浓度的增加，导致过滤效率下降，这种现象称为二次夹带，在微米级液滴中非常容易出现)也将增加。When the site is in the working condition of high concentration and large particle size droplets, the processing capacity of the existing gas-liquid coalescence filter element cannot meet the requirements. Impurities will quickly block the filter element, causing filter element failure, and the high-viscosity droplets entrained in the air flow will be aggregated. After being captured by the coalescing filter element, it is difficult to discharge it in time inside the fiber, resulting in a rapid increase in the pressure drop of the filter element and secondary entrainment of droplets (the droplets already captured by the coalescing filter will enter the downstream airflow again due to the action of the airflow, causing the downstream airflow to The increase in droplet concentration leads to a decrease in filtration efficiency. This phenomenon is called secondary entrainment and is very easy to occur in micron-sized droplets.) will also increase.
为解决上述技术问题，本发明实施例提供一种具有预分离功能的气液聚结滤芯，通过在滤芯内骨架所限定的空间中设置导流装置和导流通道，能有效利用滤芯内部空间，占用空间小，并且解决当气流中含有高粘度液体杂质等复杂工况，杂质附着在多孔介质内部不易排出，将堵塞多孔介质，造成压降急剧升高，导致滤芯寿命减小，需频繁更换的问题，并且适于现场含液量波动较大、来流中含有高粘度液体杂质等复杂情况，并有效减少液滴二次夹带现象。In order to solve the above technical problems, embodiments of the present invention provide a gas-liquid coalescing filter element with a pre-separation function. By arranging a flow guide device and a flow guide channel in the space limited by the inner frame of the filter element, the internal space of the filter element can be effectively utilized. It occupies a small space and solves complex working conditions such as when the air flow contains high-viscosity liquid impurities. The impurities adhere to the inside of the porous medium and are difficult to discharge, which will block the porous medium, causing a sharp increase in pressure drop, resulting in a reduction in the life of the filter element and the need for frequent replacement. It is suitable for complex situations such as large fluctuations in on-site liquid content and high-viscosity liquid impurities in the incoming flow, and can effectively reduce the secondary entrainment of droplets.
图3为本发明实施例具有预分离功能的气液聚结滤芯的结构示意图。如图3所示，该具有预分离功能的气液聚结滤芯，一般立式放置，具体可包括：滤芯内骨架3、滤芯聚结层4、滤芯排液层5、滤芯外骨架6、滤芯上端盖7、滤芯下端盖8、导流装置1以及导流通道2；Figure 3 is a schematic structural diagram of a gas-liquid coalescing filter element with pre-separation function according to an embodiment of the present invention. As shown in Figure 3, the gas-liquid coalescing filter element with pre-separation function is generally placed vertically and can specifically include: filter element inner frame 3, filter element coalescing layer 4, filter element drainage layer 5, filter element outer frame 6, filter element Upper end cover 7, filter element lower end cover 8, diversion device 1 and diversion channel 2;
其中，滤芯聚结层4主要由孔径较小的材料组成，如玻璃纤维、聚丙烯、聚酯纤维以及金属纤维等材料，纤维直径可为0.5～40μm，平均孔径可为5～40μm，可使用疏水疏油改性处理，可为多层缠绕或折叠等组合方式，可为一种材料，也可为孔径存在某些关联的多种材料复合或组合而成，如孔径梯度分布；也可是熔喷、热压成型、粘合剂成型等加工工艺。Among them, the filter core coalescing layer 4 is mainly composed of materials with smaller pore sizes, such as glass fiber, polypropylene, polyester fiber, metal fiber and other materials. The fiber diameter can be 0.5-40 μm, and the average pore size can be 5-40 μm. It can be used Hydrophobic and oleophobic modification treatment can be a combination of multi-layer winding or folding. It can be one kind of material, or it can be a composite or combination of multiple materials with certain correlations in pore size, such as pore size gradient distribution; it can also be melted Spraying, hot pressing molding, adhesive molding and other processing techniques.
滤芯排液层5所用材料的孔径比滤芯聚结层所用材料的孔径大，以为通过滤芯聚结层后的液体提供排液通道，可为聚酯纤维、聚丙烯纤维及芳纶纤维等材料，纤维直径较聚结层大，纤维直径可为10-50μm，可使用疏水疏油改性处理。The pore size of the material used in the drainage layer 5 of the filter element is larger than that of the material used in the coalescing layer of the filter element to provide a drainage channel for the liquid that passes through the coalescing layer of the filter element. It can be made of polyester fiber, polypropylene fiber, aramid fiber and other materials. The fiber diameter is larger than that of the coalescence layer, and the fiber diameter can be 10-50 μm, and hydrophobic and oleophobic modification can be used.
值得说明的是，滤芯聚结层4及滤芯排液层5材料的纤维直径、孔径和层数等参数可根据实际工况需求做出调整。It is worth mentioning that the fiber diameter, pore size, number of layers and other parameters of the filter element coalescing layer 4 and filter element drain layer 5 materials can be adjusted according to actual working conditions.
该滤芯内骨架3、滤芯聚结层4、滤芯排液层5、滤芯外骨架6由内向外依次套置，且均为柱形结构。The inner frame 3 of the filter element, the coalescing layer 4 of the filter element, the drainage layer 5 of the filter element, and the outer frame 6 of the filter element are nested in sequence from the inside to the outside, and are all cylindrical structures.
其中，该柱形结构包括圆柱形结构、三棱柱结构、四棱柱结构等，包括但不限于此，为了叙述方便，本发明实施例以圆柱形结构为例，对各个部件进行示例性说明，本领域技术人员可以理解的是，圆柱形结构仅是一种示例，并非对本发明的限制。The cylindrical structure includes a cylindrical structure, a triangular prism structure, a quadrangular prism structure, etc., including but not limited to these. For the convenience of description, the embodiment of the present invention takes a cylindrical structure as an example to illustrate each component. Those skilled in the art can understand that the cylindrical structure is only an example and does not limit the present invention.
该滤芯上端盖7设置在该滤芯外骨架6的上端，将该滤芯的上部封死，滤芯下端盖8设置在该滤芯外骨架6的下端，将该滤芯的下部封死。The upper end cap 7 of the filter element is disposed on the upper end of the outer frame 6 of the filter element to seal the upper part of the filter element. The lower end cap 8 of the filter element is disposed on the lower end of the outer frame 6 of the filter element to seal the lower part of the filter element.
另外，该滤芯下端盖8上设有进气口9，优选在滤芯下端盖8中部位置设有进气口9，该进气口9的形状与该导流通道2的截面形状相匹配。In addition, the lower end cover 8 of the filter element is provided with an air inlet 9 , preferably in the middle of the lower end cover 8 of the filter element. The shape of the air inlet 9 matches the cross-sectional shape of the guide channel 2 .
该进气口9处设置导流装置1，该导流装置1用于使通过该进气口9进入滤芯内部的气体产生旋转气流；A flow guide device 1 is provided at the air inlet 9, and the flow guide device 1 is used to generate a rotating air flow from the gas entering the interior of the filter element through the air inlet 9;
该导流通道2设置于该滤芯内骨架3内部，并与该滤芯内骨架3相隔一定距离，即二者之间有一定的空间。同时，该导流通道2连接该导流装置1，优选套置在该导流装置1的外侧，用于为该导流装置1输出的旋转气流提供流动路径(也可称为液滴分离空间)。该旋转气流在该导流通道2内流动时，在离心力的作用下分离出液滴并甩到该导流通道2壁面上，液滴汇集在一起，形成大液滴或液流，大液滴或液流在重力作用下沿着导流通道2的内壁面向下排出。The flow guide channel 2 is arranged inside the inner frame 3 of the filter element and is separated from the inner frame 3 of the filter element by a certain distance, that is, there is a certain space between the two. At the same time, the flow guide channel 2 is connected to the flow guide device 1 and is preferably placed outside the flow guide device 1 to provide a flow path (also called a droplet separation space) for the rotating airflow output by the flow guide device 1 ). When the rotating airflow flows in the guide channel 2, liquid droplets are separated under the action of centrifugal force and thrown to the wall of the guide channel 2. The droplets gather together to form large droplets or liquid flows. Large droplets Or the liquid flow is discharged downward along the inner wall of the guide channel 2 under the action of gravity.
本发明实施例提供的具有预分离功能的气液聚结滤芯，通过在滤芯内骨架所限定的空间中设置导流装置和导流通道，能有效利用滤芯内部空间，占用空间小。其次，通过在进气口处设置导流装置，使进入滤芯的待过滤气体产生旋转气流，导流通道为旋转气流提供一定的分离空间(或称流通空间)，使得旋转气流中夹带的液滴在离心力的作用下分离出来并甩到导流通道的内壁，内壁上的液滴汇聚在一起，在重力作用下向下流动及时排除，有效滤除了气体中的液滴。再者，旋转气流流动到滤芯上端盖后，受到该滤芯上端盖的阻挡，旋转向下并扩散至导流装置与滤芯内骨架之间的空间内，旋转向下流动，即改变了气流沿内骨架的流动方向，该旋转向下的气流在离心力和惯性的作用下，分离出气流中液滴，并在向下的气流作用下，沿内骨架内壁向下排出，气流经滤芯内骨架流入滤芯聚结层(也可称为滤芯纤维层)，气体中的剩余少量液滴随气流进入滤芯聚结层，由滤芯聚结层聚结成大液滴，在气流的作用下流至排液层，在排液层中向下排出，经过过滤的气体通过滤芯外骨架向外流出，以此实现多级过滤，过滤效果好。滤芯聚结层仅需吸收剩余少量液滴，防止杂质将其堵塞，气流中夹带的高粘度液滴能够及时排出，并且能有效减少液滴二次夹带。The gas-liquid coalescing filter element with pre-separation function provided by the embodiment of the present invention can effectively utilize the internal space of the filter element and occupy a small space by arranging a flow guide device and a flow guide channel in the space limited by the inner frame of the filter element. Secondly, by setting up a flow guide device at the air inlet, the gas to be filtered entering the filter element generates a rotating air flow. The flow guide channel provides a certain separation space (or flow space) for the rotating air flow, so that the liquid droplets entrained in the rotating air flow can be It is separated under the action of centrifugal force and thrown to the inner wall of the diversion channel. The droplets on the inner wall gather together and flow downward under the action of gravity to be eliminated in time, effectively filtering out the droplets in the gas. Furthermore, after the rotating airflow flows to the upper end cover of the filter element, it is blocked by the upper end cover of the filter element, rotates downward and diffuses into the space between the flow guide device and the inner frame of the filter element, and rotates downward to flow, which changes the airflow along the inner In the flow direction of the skeleton, the rotating downward airflow separates the droplets in the airflow under the action of centrifugal force and inertia, and is discharged downward along the inner wall of the inner skeleton under the action of the downward airflow. The airflow flows into the filter element through the inner skeleton of the filter element. The coalescing layer (also called the filter element fiber layer), the remaining small amount of droplets in the gas enters the filter element coalescing layer with the air flow, and is coalesced into large droplets by the filter element coalescing layer, and flows to the drainage layer under the action of the air flow. It is discharged downward in the liquid drainage layer, and the filtered gas flows out through the outer frame of the filter element, thereby achieving multi-stage filtration and good filtration effect. The coalescing layer of the filter element only needs to absorb a small amount of remaining droplets to prevent impurities from clogging it. High-viscosity droplets entrained in the air flow can be discharged in time, and can effectively reduce secondary entrainment of droplets.
本发明有效利用滤芯内部空间设置导流装置及通道而不是多孔介质预分离部分液滴、导流促进排液的思路，设计出的滤芯可应对含液量波动以及粘性杂质工况、及时将捕获的液滴排出、延长滤芯使用寿命，可在不增加站场装置的基础上满足处理量要求，又具有成本低、结构紧凑、节省空间、便于拆装等优点。This invention effectively utilizes the internal space of the filter element to set up diversion devices and channels instead of porous media to pre-separate some droplets and guide the flow to promote liquid drainage. The designed filter element can cope with fluctuations in liquid content and working conditions of viscous impurities, and capture them in a timely manner. It can effectively discharge droplets and extend the service life of the filter element. It can meet the processing capacity requirements without increasing the station equipment. It also has the advantages of low cost, compact structure, space saving, and easy disassembly and assembly.
在一个可选的实施例中，该导流装置可采用任意能提供切向速度的结构，比如轴向导流叶片，参见图4，该导流装置4可以包括：外筒体、中部旋转轴以及设置在该中部旋转轴上的叶片，中部旋转轴带动该叶片旋转。In an optional embodiment, the flow guide device can adopt any structure that can provide tangential speed, such as axial guide blades. See Figure 4. The flow guide device 4 can include: an outer cylinder, a middle rotation shaft And the blade is arranged on the middle rotating shaft, and the middle rotating shaft drives the blade to rotate.
当然，本发明实施例中的导流装置也可采用其他可以产生旋流的结构，可为金属或树脂等非金属材料，用于提供切向速度，气流通过导流装置获得离心力，其中夹带的液滴在惯性离心力作用下被甩到导流通道2的壁面上。适用于入口气速2-25m/s，优选值为4m/s。导流叶片参数主要包括叶片的进出口角α、β、叶片高度、叶片保弧长及叶片数，可根据进口速度做出优化设计。Of course, the flow guide device in the embodiment of the present invention can also adopt other structures that can generate swirling flows, and can be made of non-metallic materials such as metal or resin to provide tangential velocity. The airflow obtains centrifugal force through the flow guide device, wherein the entrained The droplets are thrown to the wall of the diversion channel 2 under the action of inertial centrifugal force. Suitable for inlet air velocity 2-25m/s, the preferred value is 4m/s. The parameters of the guide blade mainly include the blade's inlet and outlet angle α, β, blade height, blade arc length and blade number, which can be optimized according to the inlet speed.
值得说明的是，导流装置1的位置及数量可根据实际工况需求做出调整，例如可沿导流通道增加导流装置数量，为气流提供额外的切向速度。It is worth noting that the position and number of the guide devices 1 can be adjusted according to actual working conditions. For example, the number of guide devices can be increased along the guide channel to provide additional tangential velocity for the airflow.
导流通道2可为任意形状的可以提供一定分离空间并使气流先向上运动到滤芯顶部再向下运动进入滤芯聚结层4的导流管，导流通道2长度可根据工况不同进行调节，一般为300-800mm，优选600-700mm，另外，该导流通道2可为金属或树脂等非金属材料，用于提供一定分离空间，沿高度方向上捕集不同粒径的液滴，大液滴在较短距离内被分离，小液滴经过一定距离后运动到壁面处，被分离的液滴沿壁面及时排下。The guide channel 2 can be a guide tube of any shape that can provide a certain separation space and allow the airflow to move upward to the top of the filter element and then move downward into the coalescing layer 4 of the filter element. The length of the guide channel 2 can be adjusted according to different working conditions. , generally 300-800mm, preferably 600-700mm. In addition, the diversion channel 2 can be made of non-metallic materials such as metal or resin, which is used to provide a certain separation space and capture droplets of different particle sizes in the height direction. The droplets are separated within a short distance. After passing a certain distance, the small droplets move to the wall, and the separated droplets are discharged along the wall in time.
结合图5和图6，在一个可选的实施例中，该导流通道2为空心圆柱结构，且该导流通道2壁面均匀设有多个弧形排液槽21，优选12～24个，包括但不限于此。甩到导流通道2内壁面上的液滴在旋转气流的作用下运动到该弧形排液槽21内，气体则继续在导流通道内旋转上升，液滴在弧形排液槽内及时排下，由于进气口的形状与该导流通道2的截面形状相匹配，所以顺着弧形排液槽流下的液滴，顺着进气口与导流装置之间的缝隙以液膜形式排出，减少了液滴的二次夹带，提高了分离效率。其中，弧形排液槽21的尺寸参数可根据气流方向、速度及液滴粒径等进行优化设计。5 and 6, in an optional embodiment, the flow guide channel 2 has a hollow cylindrical structure, and the wall surface of the flow guide channel 2 is evenly provided with a plurality of arc-shaped drainage grooves 21, preferably 12 to 24. , including but not limited to this. The liquid droplets thrown onto the inner wall of the diversion channel 2 move into the arc-shaped drainage tank 21 under the action of the rotating air flow. The gas continues to rotate and rise in the diversion channel, and the droplets are promptly discharged in the arc-shaped drainage tank. Since the shape of the air inlet matches the cross-sectional shape of the guide channel 2, the liquid droplets flowing down the arc-shaped drainage groove will form a liquid film along the gap between the air inlet and the guide device. Form discharge reduces secondary entrainment of droplets and improves separation efficiency. Among them, the size parameters of the arc-shaped drain groove 21 can be optimized and designed according to the air flow direction, speed, droplet size, etc.
在一个可选的实施例中，在导流通道2侧面(或称壁面)均匀开有多个斜缝23，优选4-12个斜缝，包括但不限于此，该斜缝竖直设置，斜缝的宽度可在1-5mm之间，该斜缝由该导流通道外侧向内侧的倾斜方向与该旋转气流的流动方向的夹角小于90度，即与气流方向相反，液滴在惯性作用下通过斜缝23继续向前运动，而部分气流从缝隙23中排出，由于斜缝23增加了气体的流通面积，因此降低了导流通道2的压降，斜缝23的另一个作用是使得导流通道2外部环形空间气流分布更加均匀。In an optional embodiment, a plurality of oblique slits 23 are evenly opened on the side (or wall) of the diversion channel 2, preferably 4-12 oblique slits, including but not limited to this, and the oblique slits are arranged vertically, The width of the oblique slit can be between 1-5 mm. The angle between the inclination direction of the oblique slit from the outside to the inside of the guide channel and the flow direction of the rotating airflow is less than 90 degrees, that is, opposite to the direction of the airflow, the droplets will move in the inertial direction. Under the action of the oblique slit 23, it continues to move forward, and part of the air flow is discharged from the slit 23. Since the slant slit 23 increases the flow area of the gas, the pressure drop of the diversion channel 2 is reduced. Another function of the slant slit 23 is This makes the airflow distribution in the annular space outside the guide channel 2 more uniform.
斜缝23的出气量在12％-20％之间，在相同操作条件下，带有斜缝的导流装置比普通导流直管压降至少降低21％。The air outlet volume of the oblique slit 23 is between 12% and 20%. Under the same operating conditions, the pressure drop of the diversion device with the oblique slit is at least 21% lower than that of the ordinary diversion straight pipe.
其中，斜缝23的尺寸参数可根据气流方向、速度及液滴粒径等进行优化设计。Among them, the size parameters of the oblique slit 23 can be optimized and designed according to the air flow direction, speed, droplet size, etc.
在一个可选的实施例中，参见图1，导流通道2的上端设有喇叭口22，用于导流扩散导流通道2内的旋转气流，使得该旋转气流触碰到滤芯上端盖之后，能够更好地进入导流通道2和滤芯内骨架3之间的空间。In an optional embodiment, see Figure 1, the upper end of the guide channel 2 is provided with a bell mouth 22, which is used to guide and diffuse the rotating airflow in the guide channel 2, so that the rotating airflow touches the upper end cover of the filter element. , can better enter the space between the diversion channel 2 and the inner frame 3 of the filter element.
具体地，旋转气流经导流通道2旋转向上，后经喇叭口导流向外渐扩，到达滤芯顶端后在导流通道2外部空间(即导流通道2和滤芯内骨架3之间的空间)向下旋转流动，并有部分气体径向向外流出滤芯内骨架3。Specifically, the rotating airflow rotates upward through the guide channel 2, and then gradually expands outward through the bell mouth. After reaching the top of the filter element, it flows in the outer space of the guide channel 2 (that is, the space between the guide channel 2 and the inner frame 3 of the filter element). ) rotates downward and flows, and some gas flows out radially outward from the inner frame 3 of the filter element.
图7a为本发明实施例具有预分离功能的气液聚结滤芯中一种滤芯内骨架的局部结构示意图。如图7a所示，该滤芯内骨架3表面开有通孔31，所述通孔31的出口处设置一导流槽34，形成曲折流道结构。滤芯内骨架3与导流装置1和导流通道2合理匹配，气流通过导流装置1和导流通道2后，向下旋转进入导流通道2外部环形空间，部分气体通过该通孔31扩散至滤芯聚结层4，气体通过曲折流道结构时，在惯性的作用下，能够分离出液滴，进一步实现气液分离。Figure 7a is a partial structural schematic diagram of the inner frame of a filter element in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention. As shown in Figure 7a, a through hole 31 is opened on the surface of the inner frame 3 of the filter element, and a guide groove 34 is provided at the outlet of the through hole 31 to form a meandering flow channel structure. The inner frame 3 of the filter element is reasonably matched with the guide device 1 and the guide channel 2. After the airflow passes through the guide device 1 and the guide channel 2, it rotates downwards and enters the annular space outside the guide channel 2, and part of the gas diffuses through the through hole 31. When the gas reaches the coalescence layer 4 of the filter element, when the gas passes through the tortuous flow channel structure, under the action of inertia, the liquid droplets can be separated, further achieving gas-liquid separation.
在一个可选的实施例中，滤芯内骨架3的内壁面设有排液槽33，所述旋转气流在所述滤芯内骨架3和所述导流通道2之间的空间旋转流动时，在离心力的作用下分离出的液滴沿所述排液槽33向下排出。其中，该排液槽33可以理解为在滤芯内骨架3内壁面上设置的竖直的沟槽。In an optional embodiment, the inner wall surface of the filter element inner frame 3 is provided with a drainage groove 33. When the rotating airflow rotates in the space between the filter element inner frame 3 and the guide channel 2, The liquid droplets separated under the action of centrifugal force are discharged downward along the liquid discharge groove 33 . The drainage groove 33 can be understood as a vertical groove provided on the inner wall surface of the inner frame 3 of the filter element.
进一步地，在滤芯内骨架3内壁面、通孔31上方设置斜挡板钩32，用于防止分离的液滴夹带进入滤芯聚结层4，亦可起到导流作用，向下旋流离心力作用分离的液滴以及曲折流道结构惯性作用分离的液滴沿斜挡板钩32以及滤芯内骨架3内壁面，在向下气流的作用下被排液槽33捕集，在向下气流的作用下，以液膜形式排下。其中，该斜挡板钩32的形状可以为将斜挡板的边沿向上弯曲后形成的结构。Further, an inclined baffle hook 32 is provided on the inner wall surface of the inner frame 3 of the filter element and above the through hole 31 to prevent the separated droplets from being entrained into the coalescing layer 4 of the filter element. It can also play a diversion role and swirl down the centrifugal force. The liquid droplets separated by the action and the inertia of the tortuous flow channel structure are separated along the inclined baffle hook 32 and the inner wall surface of the filter element inner frame 3, and are captured by the drain groove 33 under the action of the downward airflow. Under the action, it is discharged in the form of liquid film. The shape of the oblique baffle hook 32 may be a structure formed by bending the edge of the oblique baffle upward.
当然，滤芯内骨架3表面结构可为配合气流方向达到惯性分离，防止夹带并使排液方向与气流方向相同的任意结构，包括但不限于上述结构。Of course, the surface structure of the inner frame 3 of the filter element can be any structure that matches the direction of the air flow to achieve inertial separation, prevent entrainment, and make the liquid discharge direction the same as the direction of the air flow, including but not limited to the above-mentioned structures.
图7b为图7a中滤芯内骨架的平面图。如图7b所示，该通孔31和斜挡板钩32沿气流方向倾斜设置。Figure 7b is a plan view of the inner frame of the filter element in Figure 7a. As shown in Figure 7b, the through hole 31 and the inclined baffle hook 32 are arranged obliquely along the air flow direction.
值得说明的是，通孔31以及斜挡板钩32的倾斜角度根据气流速度以及气流方向而定，可为5-175°，优选值为15-30°以及150-165°。曲折流道结构参数可根据气流速度、夹带的液滴粒径及斯托克斯数进行优化。It is worth mentioning that the inclination angle of the through hole 31 and the inclined baffle hook 32 depends on the air flow speed and the air flow direction, and can be 5-175°, and the preferred values are 15-30° and 150-165°. The structural parameters of the meandering flow channel can be optimized based on the air flow velocity, entrained droplet size and Stokes number.
具体地，通过将通孔31和斜挡板钩32沿气流方向倾斜设置，一方面方便气体通过该通孔31扩散至滤芯聚结层，另一方面，有利于液膜在气流作用下沿斜挡板钩汇集至该排液槽33，进而沿着排液槽33流下。Specifically, by arranging the through hole 31 and the inclined baffle hook 32 obliquely along the air flow direction, on the one hand, it is convenient for the gas to diffuse to the coalescing layer of the filter core through the through hole 31, and on the other hand, it is beneficial for the liquid film to move along the inclined direction under the action of the air flow. The baffle hooks collect into the drain groove 33 and then flow down along the drain groove 33 .
图8为本发明实施例具有预分离功能的气液聚结滤芯中另一种滤芯内骨架的局部结构示意图。如图8所示，该滤芯内骨架3的内壁面设有弧形结构，在所述弧形结构两侧开有通孔31，所述通孔31的出口处设置导流槽形成曲折流道结构。滤芯内骨架3与导流装置1和导流通道2合理匹配，气流通过导流装置1和导流通道2后，向下旋转进入导流通道2外部环形空间，部分气体通过该通孔31扩散至滤芯聚结层4，气体通过弧形结构和曲折流道结构时，在惯性碰撞作用下，能够分离出液滴，进一步实现气液分离，分离后的气体则由该通孔31扩散至滤芯聚结层4。Figure 8 is a partial structural schematic diagram of another filter element inner skeleton in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention. As shown in Figure 8, the inner wall surface of the inner frame 3 of the filter element is provided with an arc-shaped structure. There are through holes 31 on both sides of the arc-shaped structure. A guide groove is provided at the outlet of the through hole 31 to form a meandering flow channel. structure. The inner frame 3 of the filter element is reasonably matched with the guide device 1 and the guide channel 2. After the airflow passes through the guide device 1 and the guide channel 2, it rotates downwards and enters the annular space outside the guide channel 2, and part of the gas diffuses through the through hole 31. When the gas reaches the coalescence layer 4 of the filter element, when the gas passes through the arc structure and the tortuous flow channel structure, the droplets can be separated under the action of inertial collision, further achieving gas-liquid separation. The separated gas diffuses to the filter element through the through hole 31 Coalescence layer 4.
该弧形结构的弧形底端形成排液槽33。通过弧形结构和曲折流道结构分离出的液滴在气流的作用下运动至排液槽33，并顺着排液槽33向下排出。The arc-shaped bottom end of the arc-shaped structure forms a drain groove 33 . The liquid droplets separated through the arc-shaped structure and the meandering flow channel structure move to the drain groove 33 under the action of the air flow, and are discharged downward along the drain groove 33 .
进一步地，在滤芯内骨架3内壁面、通孔31上方设置斜挡板钩32，用于防止分离的液滴夹带进入滤芯聚结层4，亦可起到导流作用，向下旋流离心力作用分离的液滴以及曲折流道结构惯性作用分离的液滴沿斜挡板钩32以及滤芯内骨架3内壁面，在向下气流的作用下被排液槽33捕集，在向下气流的作用下，以液膜形式排下。其中，该斜挡板钩32的形状可以为将斜挡板的边沿向上弯曲后形成的结构。Further, an inclined baffle hook 32 is provided on the inner wall surface of the inner frame 3 of the filter element and above the through hole 31 to prevent the separated droplets from being entrained into the coalescing layer 4 of the filter element. It can also play a diversion role and swirl down the centrifugal force. The liquid droplets separated by the action and the inertia of the tortuous flow channel structure are separated along the inclined baffle hook 32 and the inner wall surface of the filter element inner frame 3, and are captured by the drain groove 33 under the action of the downward airflow. Under the action, it is discharged in the form of liquid film. The shape of the oblique baffle hook 32 may be a structure formed by bending the edge of the oblique baffle upward.
值得说明的是，通孔31以及斜挡板钩32可沿气流方向倾斜设置，倾斜角度根据气流速度以及气流方向而定，可为5-175°，优选值为15-30°以及150-165°。曲折流道结构参数以及弧形结构的参数可根据气流速度、夹带的液滴粒径及斯托克斯数进行优化。It is worth mentioning that the through hole 31 and the inclined baffle hook 32 can be inclined along the direction of the air flow. The angle of inclination is determined according to the air flow speed and the air flow direction, and can be 5-175°, and the preferred values are 15-30° and 150-165. °. The structural parameters of the meandering flow channel and the parameters of the arc structure can be optimized according to the air flow velocity, entrained droplet size and Stokes number.
具体地，通过将通孔31和斜挡板钩32沿气流方向倾斜设置，一方面方便气体通过该通孔31扩散至滤芯聚结层，另一方面，有利于液膜在气流作用下沿斜挡板钩汇集至该排液槽33，进而沿着排液槽33流下。Specifically, by arranging the through hole 31 and the inclined baffle hook 32 obliquely along the air flow direction, on the one hand, it is convenient for the gas to diffuse to the coalescing layer of the filter core through the through hole 31, and on the other hand, it is beneficial for the liquid film to move along the inclined direction under the action of the air flow. The baffle hooks collect into the drain groove 33 and then flow down along the drain groove 33 .
当然，本领域技术人员可以理解的是，滤芯内骨架3的曲折流道和表面结构不局限于实施案例所述结构，可为能达到惯性分离作用并能防止二次夹带，利用气流方向加速被捕集液滴排下的任意结构，结构参数可根据实际工况需求做出调整。Of course, those skilled in the art can understand that the tortuous flow channel and surface structure of the inner frame 3 of the filter element are not limited to the structures described in the embodiment examples. In order to achieve inertial separation and prevent secondary entrainment, the air flow direction can be used to accelerate the filter element. It can capture any structure under the droplet row, and the structural parameters can be adjusted according to actual working conditions.
图9为本发明实施例具有预分离功能的气液聚结滤芯中滤芯外骨架的局部结构示意图。如图9所示，该滤芯外骨架6上设有流通孔60，所述滤芯外骨架6内壁面流通孔60位置设有导流槽61。其中，流通孔60和导流槽61可以是任意可使气流向下运动进入导流槽61并向外流出的结构。Figure 9 is a partial structural diagram of the outer frame of the filter element in the gas-liquid coalescing filter element with pre-separation function according to the embodiment of the present invention. As shown in FIG. 9 , the outer frame 6 of the filter element is provided with a flow hole 60 , and the inner wall surface of the outer frame 6 of the filter element is provided with a guide groove 61 at the position of the flow hole 60 . Among them, the flow hole 60 and the guide groove 61 can be any structure that can make the air flow move downward into the guide groove 61 and flow out outward.
滤芯外骨架6设置在滤芯排液层5的外侧，即气流在通过滤芯排液层5时是向下运动的，经滤芯聚结层4捕集的液滴在气流作用下运动到滤芯排液层5，气流方向与排液方向相同，并在向下气流作用下，及时向下排出，因此可以降低滤芯压降，防止二次夹带，延长滤芯使用寿命。The outer frame 6 of the filter element is arranged outside the filter element drainage layer 5, that is, the airflow moves downward when passing through the filter element drainage layer 5, and the liquid droplets captured by the filter element coalescence layer 4 move to the filter element drainage layer under the action of the air flow. Layer 5, the air flow direction is the same as the liquid discharge direction, and is discharged downward in time under the action of downward air flow, so it can reduce the pressure drop of the filter element, prevent secondary entrainment, and extend the service life of the filter element.
当然，本领域技术人员可以理解的是，滤芯外骨架6表面的导流通道不局限于实施案例所述结构，可为能达到改变通过排液层气流的方向，促进液体在排液层中排下并防止二次夹带的任意结构。Of course, those skilled in the art can understand that the flow guide channel on the surface of the outer frame 6 of the filter element is not limited to the structure described in the embodiment. It can change the direction of the air flow through the liquid drainage layer and promote the drainage of liquid in the liquid drainage layer. Any structure that lowers and prevents secondary entrainment.
可以理解的是，以液膜形式排下的液滴，在到达下端盖时，会通过滤芯内骨架的通孔31流通到滤芯聚结层，进而流动到滤芯排液层，滤芯排液层下部的液滴积累到一定程度后，会顺着滤芯外骨架6下部的流通孔和导流槽61流出滤芯。It can be understood that when the droplets discharged in the form of a liquid film reach the lower end cover, they will flow to the coalescing layer of the filter element through the through hole 31 of the inner skeleton of the filter element, and then flow to the filter element drainage layer, and the lower part of the filter element drainage layer After the liquid droplets accumulate to a certain extent, they will flow out of the filter element along the flow holes and diversion grooves 61 at the lower part of the filter element outer frame 6.
本发明实施例提供的气液聚结滤芯，其导流装置、导流通道、滤芯聚结层、滤芯排液层、滤芯内骨架、滤芯外骨架及其表面结构布置，为统一整体，相互促进。所述各结构参数应选择适当，通过各结构之间的互相匹配，达到预期的分离效果。In the gas-liquid coalescing filter element provided by the embodiment of the present invention, its flow guide device, flow guide channel, filter element coalescing layer, filter element drainage layer, filter element inner frame, filter element outer frame and their surface structural arrangement are unified as a whole and promote each other. . The structural parameters should be selected appropriately, and the expected separation effect can be achieved through mutual matching between the structures.
另外，本发明实施例中提供的气液聚结滤芯，滤芯外骨架6、导流装置1、导流通道2、滤芯内骨架之间可以是可拆装的，可根据工况单独使用或组合使用。连接方式可为拆装孔和螺栓紧固组合等。In addition, the gas-liquid coalescing filter element provided in the embodiment of the present invention, the outer frame 6 of the filter element, the guide device 1, the guide channel 2, and the inner frame of the filter element can be detachable and can be used individually or combined according to the working conditions. use. The connection method can be a combination of disassembly and assembly holes and bolt fastening.
下面，举例说明本发明实施例提供的气液聚结滤芯的工作过程：Below, an example is given to illustrate the working process of the gas-liquid coalescing filter element provided by the embodiment of the present invention:
在气液聚结滤芯内部集成至少三级分离过程：Integrate at least three stages of separation process inside the gas-liquid coalescing filter element:
第一级分离是通过在进气口处设置导流装置，在滤芯内部产生旋流，结合导流通道，给夹带的液滴一定的分离空间，在离心力作用下产生液滴，大液滴首先被甩到导流通道壁面上，小液滴经过一定分离空间后被甩到壁面上，通过壁面上的弧形排液槽排下，并在壁面上开有斜缝降低其压降。其中，第一级分离主要依靠离心力去除粒径5μm以上的液滴。The first stage of separation is to set up a flow guide device at the air inlet to generate a swirling flow inside the filter element. Combined with the flow guide channel, a certain separation space is given to the entrained droplets. Droplets are generated under the action of centrifugal force. Large droplets are first After being thrown to the wall of the diversion channel, the small droplets are thrown to the wall after passing through a certain separation space, and are discharged through the arc-shaped drainage groove on the wall, and there are inclined slits on the wall to reduce the pressure drop. Among them, the first stage of separation mainly relies on centrifugal force to remove droplets with a particle size of more than 5 μm.
第二级分离是依靠滤芯内骨架表面的曲折流道结构进行惯性分离，并通过上一级导流通道对气流方向的改变，使得气流旋转向下流经内骨架表面，方向与排液方向相同，内骨架表面的通孔处设置有斜挡板钩，一是防止内骨架表面液膜被气流夹带进入滤芯聚结层，二是挡板钩倾斜角度依据气流方向设计，拦截下的液滴在气流作用下，沿斜挡板钩运动到排液槽内，并在向下气流作用下及时排下。其中，第二级分离主要依靠惯性和离心力的共同作用去除粒径3μm以上的液滴。The second-stage separation relies on the tortuous flow channel structure on the surface of the inner frame of the filter element for inertial separation, and changes the direction of the airflow through the upper-level diversion channel, causing the airflow to rotate downward through the surface of the inner frame, in the same direction as the liquid discharge direction. An inclined baffle hook is provided at the through hole on the surface of the endoskeleton. First, it prevents the liquid film on the surface of the endoskeleton from being entrained by the air flow and entering the coalescing layer of the filter element. Second, the inclination angle of the baffle hook is designed according to the direction of the air flow, so that the intercepted droplets will pass through the air flow. Under the action of the action, it moves along the inclined baffle hook into the drainage groove, and is drained down in time under the action of downward airflow. Among them, the second-stage separation mainly relies on the joint action of inertia and centrifugal force to remove droplets with a particle size of more than 3 μm.
第三级分离是依靠滤芯聚结层将剩余的小液滴聚结成大液滴，并在气流作用下运动到滤芯排液层，而位于滤芯排液层后面的滤芯外骨架内表面设置的导流通道对气流起到向下的导流作用，气流在通过与滤芯外骨架相靠的排液层时气流方向向下，在向下气流的作用下，被捕集的液体可及时从排液层排下。第三级分离主要依靠滤芯聚结层过滤分离粒径0.3μm以上的液滴。The third stage of separation relies on the coalescence layer of the filter element to coalesce the remaining small droplets into large droplets and move them to the filter element drainage layer under the action of air flow. The inner surface of the outer frame of the filter element located behind the filter element drainage layer is set The diversion channel plays a downward guiding role in the air flow. When the air flow passes through the liquid drainage layer adjacent to the outer frame of the filter element, the air flow direction is downward. Under the action of the downward air flow, the captured liquid can be discharged from the drain in time. Drain the liquid layer. The third stage of separation mainly relies on the coalescence layer of the filter element to filter and separate droplets with a particle size of 0.3 μm or more.
本发明实施例提供的气液聚结滤芯，通过至少三级分离过程，有效提高了分离效果。另外，每一级过滤分离都配合有相应的排液促进方法，通过导流通道使气流方向与排液方向相同，通过气流作用促进排液，减小二次夹带，减小因堵塞造成的阻力增加，延长滤芯使用寿命。The gas-liquid coalescence filter element provided by the embodiment of the present invention effectively improves the separation effect through at least a three-stage separation process. In addition, each stage of filtration and separation is equipped with a corresponding liquid drainage promotion method. The air flow direction is the same as the liquid drainage direction through the diversion channel. The liquid drainage is promoted through the action of air flow, reducing secondary entrainment and reducing resistance caused by blockage. Increase, extend the service life of the filter element.
选用本发明实施例提供的具有预分离功能的气液聚结滤芯与传统气液聚结滤芯进行对比实验，实验参数如下：滤芯内表面表观气流速度为0.1m/s，采用国际测试标准EN779中规定的油液(癸二酸二辛酯，DEHS)发生气溶胶，入口气溶胶中液滴粒径范围为0.3-20μm，浓度为480-520mg/m3。The gas-liquid coalescing filter element with pre-separation function provided by the embodiment of the present invention and the traditional gas-liquid coalescing filter element were selected for comparative experiments. The experimental parameters are as follows: the apparent air flow speed on the inner surface of the filter element is 0.1m/s, and the international test standard EN779 is adopted The oil specified in the product (dioctyl sebacate, DEHS) generates aerosol. The droplet size range in the inlet aerosol is 0.3-20 μm, and the concentration is 480-520 mg/m3 .
实验结果如下：随着单位面积液体累积量的增加，本发明实施例提供的具有预分离功能的气液聚结滤芯较传统聚结滤芯虽然初始压降较大，但压降增加过程较为缓慢(参见图10)，滤芯排液收集量较传统聚结滤芯大，被捕集的液体不会堵塞滤芯聚结层，运行寿命大大提高；运行一段时间后，本发明实施例提供的具有预分离功能的气液聚结滤芯压降仅比传统聚结滤芯高0.093kPa，对大于0.3μm粒子的累积计数效率较传统滤芯高21％(见图11)。本发明实施例提供的具有预分离功能的气液聚结滤芯在略微提高单级聚结滤芯的前提下，明显提高了单级聚结滤芯的处理液量及效率；且在满足处理液量要求的前提下，较站场所用多级组合过滤分离器压降大大减小。The experimental results are as follows: as the accumulated amount of liquid per unit area increases, although the initial pressure drop of the gas-liquid coalescing filter element with pre-separation function provided by the embodiment of the present invention is larger than that of the traditional coalescing filter element, the pressure drop increases slowly ( Referring to Figure 10), the filter element drainage liquid collection volume is larger than that of the traditional coalescing filter element. The collected liquid will not block the coalescing layer of the filter element, and the operating life is greatly improved. After running for a period of time, the filter element provided by the embodiment of the present invention has a pre-separation function. The pressure drop of the gas-liquid coalescing filter element is only 0.093kPa higher than that of the traditional coalescing filter element, and the cumulative counting efficiency of particles larger than 0.3μm is 21% higher than that of the traditional filter element (see Figure 11). The gas-liquid coalescing filter element with pre-separation function provided by the embodiment of the present invention significantly improves the processing liquid volume and efficiency of the single-stage coalescing filter element on the premise of slightly improving the single-stage coalescing filter element; and while meeting the processing liquid volume requirements Under the premise, the pressure drop is greatly reduced compared with the multi-stage combined filter separator used in the station.
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。It should also be noted that the terms "comprises," "comprises," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements not only includes those elements, but also includes Other elements are not expressly listed or are inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or device that includes the stated element.
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于系统实施例而言，由于其基本相似于方法实施例，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。Each embodiment in this specification is described in a progressive manner. The same and similar parts between the various embodiments can be referred to each other. Each embodiment focuses on its differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For relevant details, please refer to the partial description of the method embodiment.
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。The above descriptions are only examples of the present application and are not intended to limit the present application. To those skilled in the art, various modifications and variations may be made to this application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of the claims of this application.
| Application Number | Priority Date | Filing Date | Title |
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| CN201910186572.6ACN109758850B (en) | 2019-03-12 | 2019-03-12 | Gas-liquid coalescent filter element with preseparation function |
| Application Number | Priority Date | Filing Date | Title |
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| CN201910186572.6ACN109758850B (en) | 2019-03-12 | 2019-03-12 | Gas-liquid coalescent filter element with preseparation function |
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| CN109758850A CN109758850A (en) | 2019-05-17 |
| CN109758850Btrue CN109758850B (en) | 2023-12-22 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201910186572.6AActiveCN109758850B (en) | 2019-03-12 | 2019-03-12 | Gas-liquid coalescent filter element with preseparation function |
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