技术领域technical field
本实用新型涉及一种用于湿法烟气脱硫的烟气吸收塔，特别是一种具有扰流持液层的脱硫吸收塔，属于环保设备领域。The utility model relates to a flue gas absorption tower for wet flue gas desulfurization, in particular to a desulfurization absorption tower with a flow-disturbing liquid-holding layer, which belongs to the field of environmental protection equipment.
背景技术Background technique
石灰石-石膏湿法烟气脱硫技术因其脱硫效率高、运行稳定、吸收剂价格低廉易得等优势，占据了火电厂烟气脱硫大部分市场。吸收塔是湿法烟气脱硫系统的主体和核心设备，吸收塔的性能与造价在脱硫系统设计中占有举足轻重的地位。根据气液接触型式的不同，可以把湿法脱硫的吸收塔分为喷淋塔、填料塔、鼓泡塔、液柱塔四种型式。由于喷淋塔结构简单、操作与维护方便、气液接触良好、脱硫效率高而且在工程上的应用比较成熟，因此，喷淋塔是目前脱硫工艺的主流塔型，吸收区普遍采用空塔喷淋的方式。Limestone-gypsum wet flue gas desulfurization technology has occupied most of the flue gas desulfurization market in thermal power plants due to its advantages of high desulfurization efficiency, stable operation, low price and easy availability of absorbents. The absorption tower is the main body and core equipment of the wet flue gas desulfurization system. The performance and cost of the absorption tower play a decisive role in the design of the desulfurization system. According to the different types of gas-liquid contact, the absorption tower of wet desulfurization can be divided into four types: spray tower, packed tower, bubble tower and liquid column tower. Due to the simple structure of the spray tower, convenient operation and maintenance, good gas-liquid contact, high desulfurization efficiency and relatively mature application in engineering, the spray tower is the mainstream tower type in the current desulfurization process, and the absorption area generally adopts the empty tower spray way of showering.
普通的烟气喷淋吸收塔自下而上依次是浆液池区、烟气吸收区和除雾区。烟气从烟气吸收区下部进入吸收塔，吸收区内一般设3-5层喷淋管，每个喷淋管布置多个雾化喷嘴，喷淋浆液经雾化喷嘴雾化后向下喷淋并以弥散的雾状下降到浆液池区，与自下而上的烟气接触传质。经过气液接触后的烟气携带大量液滴，通过吸收塔上部除雾区的除雾器截留分离出大部分液滴后排出吸收塔。浆液池的功能是接受和储存吸收浆液，溶解石灰石，鼓风氧化CaSO3，结晶生成石膏。Ordinary flue gas spray absorption tower consists of slurry pool area, flue gas absorption area and demister area from bottom to top. The flue gas enters the absorption tower from the lower part of the flue gas absorption area. Generally, there are 3-5 layers of spray pipes in the absorption area. Each spray pipe is arranged with multiple atomizing nozzles. The spray slurry is atomized by the atomizing nozzles and then sprayed downward. Spray and descend to the slurry pool area in the form of diffuse mist, and contact with the bottom-up flue gas for mass transfer. After the gas-liquid contact, the flue gas carries a large number of liquid droplets, and most of the liquid droplets are intercepted and separated by the demister in the demisting area on the upper part of the absorption tower, and then discharged out of the absorption tower. The function of the slurry pool is to receive and store the absorbed slurry, dissolve limestone, blow air to oxidize CaSO3 , and crystallize to form gypsum.
在空塔喷淋中，气体和浆液接触通过吸收塔浆液喷雾来完成,烟气与喷淋浆液在吸收区反向接触，烟气中的SO2向喷淋浆液中扩散传质的过程对吸收塔脱硫效率起着关键作用。而喷淋浆液对烟气中SO2的吸收反应速率取决于烟气与浆液的相对速度、有效传质面积、接触时间等多种因素，为使烟气与喷淋浆液充分接触，工程上一般采用多层喷淋的模式，每层喷淋均匀布置大量喷嘴的方式。在脱硫的同时，烟气中的部分微细粉尘也被喷淋浆液捕集，从而实现一定的除尘效果。In the empty tower spraying, the contact between the gas and the slurry is completed by the slurry spraying in the absorption tower, the flue gas and the spraying slurry are in reverse contact in the absorption zone, and the SO2 in the flue gas diffuses and transfers to the spraying slurry. Tower desulfurization efficiency plays a key role.The absorption reaction rate of SO2 in the flue gas by the spray slurry depends on various factors such as the relative velocity between the flue gas and the slurry, the effective mass transfer area, and the contact time. In order to make the flue gas fully contact with the spray slurry, generally engineering The multi-layer spray mode is adopted, and a large number of nozzles are evenly arranged for each layer of spray. At the same time of desulfurization, part of the fine dust in the flue gas is also captured by the spray slurry, so as to achieve a certain dust removal effect.
目前，电厂用煤燃煤含硫量波动较大，经常超出脱硫装置设计值，与此同时，国家对燃煤电厂SO2和粉尘的排放标准进一步提高，新的《火电厂大气污染物排放标准》(GB13223-2011)对SO2的排放标准大幅提高，特别是重点区域内排放浓度不得超过50mg/Nm3甚至更低，粉尘排放不得超过10mg/Nm3甚至更低。这对脱硫吸收塔的脱硫效率及协同除尘效果提出了非常高的要求，原有脱硫装置面临增效改造，新建脱硫装置需要选择脱硫效率高、协同除尘效果好、净化深度高的脱硫技术及工艺。At present, the sulfur content of coal-fired coal used by power plants fluctuates greatly, often exceeding the design value of the desulfurization device. At the same time, the national emission standards for SO2 and dust in coal-fired power plants have been further improved. (GB13223-2011) has greatly increased the emission standards for SO2 , especially the emission concentration in key areas shall not exceed 50mg/Nm3 or even lower, and the dust emission shall not exceed 10mg/Nm3 or even lower. This puts forward very high requirements on the desulfurization efficiency and synergistic dust removal effect of the desulfurization absorption tower. The original desulfurization device is facing efficiency improvement, and the new desulfurization device needs to choose a desulfurization technology and process with high desulfurization efficiency, good synergistic dust removal effect, and high purification depth. .
现有的在传统石灰石－石膏湿法脱硫工艺基础上发展起来的高效脱硫技术主要有单塔双循环技术、双塔串联技术、单、双托盘技术等。单塔双循环技术和双塔串联技术具有高效、稳定的优点，但是缺点是造价昂贵，比传统脱硫系统造价提高40-50％；单、双托盘技术托盘制造工艺复杂，造价较高，且易发生堵塞等故障。The existing high-efficiency desulfurization technologies developed on the basis of the traditional limestone-gypsum wet desulfurization process mainly include single-tower double-cycle technology, double-tower series technology, and single- and double-tray technology. The single-tower double-circulation technology and the double-tower series technology have the advantages of high efficiency and stability, but the disadvantage is that the cost is expensive, which is 40-50% higher than the cost of the traditional desulfurization system; the manufacturing process of the single- and double-tray technology tray is complicated, the cost is high, and it is easy to desulfurize. Malfunction such as clogging occurs.
实用新型内容Utility model content
本实用新型需要解决的技术问题是针对上述现有技术的不足，而提供一种可以有效提高脱硫效果和除尘效果的具有扰流持液层的脱硫吸收塔。The technical problem to be solved by the utility model is to provide a desulfurization absorption tower with a turbulent liquid-holding layer that can effectively improve the desulfurization effect and dust removal effect in view of the above-mentioned deficiencies in the prior art.
为解决上述技术问题，本实用新型采用的技术方案是：For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
一种具有扰流持液层的脱硫吸收塔，包括吸收塔塔体，所述吸收塔塔体内具有喷淋层，其特征在于：在喷淋层下方设置扰流持液层，所述扰流持液层包括上下依次设置的若干层扰流层，每层扰流层又由多根相互平行的扰流柱组成，每层扰流层中的多根扰流柱均处于同一水平高度设置，所述扰流柱的两头分别固定在吸收塔塔体内壁上；上下相邻的两层扰流层中的扰流柱相互平行并交错设置。A desulfurization absorption tower with a flow-disturbing liquid-holding layer, comprising an absorption tower body, the body of the absorption tower has a spray layer, and is characterized in that: a flow-disturbing liquid-holding layer is arranged below the spray layer, and the flow-disturbing The liquid-holding layer includes several spoiler layers arranged up and down in sequence, and each spoiler layer is composed of multiple spoiler columns parallel to each other, and the multiple spoiler columns in each spoiler layer are set at the same level. The two ends of the spoiler columns are respectively fixed on the inner wall of the absorption tower; the spoiler columns in the upper and lower adjacent two spoiler layers are arranged parallel to each other and staggered.
作为更进一步的优选方案，在扰流持液层中平均分布多个模块框架，所述模块框架由四块竖板围绕组成，每个竖板平行于气流方向；所述扰流层上的扰流柱位于模块框架内，扰流柱固定在竖板上；所述模块框架上设置用于固定在吸收塔塔体上的支撑组件。As a further preferred solution, a plurality of module frames are evenly distributed in the turbulence liquid-holding layer, and the module frames are surrounded by four vertical plates, each vertical plate is parallel to the direction of air flow; The flow column is located in the module frame, and the spoiler column is fixed on the vertical plate; the support assembly for fixing on the absorption tower body is arranged on the module frame.
作为更进一步的优选方案，所述扰流柱截面直径为40mm~100mm，每层扰流层中相邻的两根扰流柱之间间距为20mm~150mm，上下相邻的两层扰流层之间的间距为40mm~150mm。As a further preferred solution, the cross-sectional diameter of the spoiler columns is 40 mm to 100 mm, the distance between two adjacent spoiler columns in each spoiler layer is 20 mm to 150 mm, and the upper and lower adjacent two spoiler layers The distance between them is 40mm~150mm.
作为更进一步的优选方案，所述模块框架的矩形结构截面的长宽比为1:1~2:1。As a further preferred solution, the aspect ratio of the rectangular structural section of the module frame is 1:1-2:1.
作为更进一步的优选方案，在模块框架靠近吸收塔塔体的内壁处设置合金多孔板。As a further preferred solution, an alloy perforated plate is arranged on the inner wall of the module frame close to the absorption tower body.
有益效果Beneficial effect
与现有技术相比，本实用新型的一种具有扰流持液层的脱硫吸收塔，喷淋液会在扰流柱表面和扰流柱之间形成一个持液层，同时对进入吸收塔的烟气进行整流，保证了在整个吸收塔截面上烟气分布的均匀性，增强了烟气在吸收区的湍流强度，强化了气液传质效果，提高了脱硫效率和除尘效果，具体具有以下有益效果：Compared with the prior art, the utility model has a desulfurization absorption tower with a turbulent liquid-holding layer. The spray liquid will form a liquid-holding layer between the surface of the turbulent column and the turbulent column, and at the same time, it will prevent the desulfurization of the absorber when it enters the absorption tower. The flue gas is rectified to ensure the uniformity of the flue gas distribution on the entire absorption tower section, enhance the turbulence intensity of the flue gas in the absorption area, strengthen the gas-liquid mass transfer effect, and improve the desulfurization efficiency and dust removal effect. The following beneficial effects:
1.大量的吸收浆液从吸收塔上部的喷淋层下落至扰流持液层，会在扰流柱表面和扰流柱之间形成一个持液层，烟气从扰流柱间隙穿过持液层，实现了气体和浆液最紧密的接触，降低了气液两相的反应阻力，大幅提高了SO2去除效率，同时也大大增强了对细微粉尘的捕集效果。1. A large amount of absorption slurry falls from the spray layer on the upper part of the absorption tower to the turbulent liquid-holding layer, forming a liquid-holding layer between the surface of the spoiler column and the turbulent column, and the flue gas passes through the space between the spoiler column and the retaining layer. The liquid layer realizes the closest contact between the gas and the slurry, reduces the reaction resistance of the gas-liquid two-phase, greatly improves the SO2 removal efficiency, and also greatly enhances the collection effect on fine dust.
2.扰流持液层对进入吸收塔的烟气进行整流，保证了在整个吸收塔截面上烟气分布的均匀性，从而使烟气和浆液的接触在整个吸收区域都被优化，提高了整体的脱硫效率和除尘效果。2. The turbulent liquid-holding layer rectifies the flue gas entering the absorption tower, ensuring the uniformity of the flue gas distribution on the entire absorption tower section, so that the contact between the flue gas and the slurry is optimized in the entire absorption area, improving the The overall desulfurization efficiency and dust removal effect.
3.由于烟气在经过扰流持液层时流通面积缩小，烟气流速加快，从而增强了烟气在吸收区的湍流强度，强化了气液传质效果，提高了脱硫效率和除尘效果。3. As the flue gas passes through the turbulent liquid-holding layer, the flow area is reduced and the flue gas velocity is accelerated, thereby enhancing the turbulence intensity of the flue gas in the absorption area, enhancing the gas-liquid mass transfer effect, and improving the desulfurization efficiency and dust removal effect.
4.由于柱状扰流持液层有效提高了脱硫和除尘效果，在达到同样的效率要求下，减少了循环浆液重量，大幅降低了系统电耗。4. Since the columnar turbulent liquid-holding layer effectively improves the desulfurization and dust removal effects, the weight of the circulating slurry is reduced under the same efficiency requirements, and the power consumption of the system is greatly reduced.
5.柱状表面不易集聚浆液颗粒，避免了堵塞现象，同时制造、安装和维护都较为简便。5. The columnar surface is not easy to accumulate slurry particles, avoiding the clogging phenomenon, and at the same time, it is relatively easy to manufacture, install and maintain.
附图说明Description of drawings
图1是吸收塔塔体内部示意图；Fig. 1 is a schematic diagram inside the absorption tower body;
图2是模块框架的结构示意图；Fig. 2 is the structural representation of module frame;
图3是扰流层俯视图；Figure 3 is a top view of the spoiler;
图4是合金多孔板与模块框架位置关系示意图；Fig. 4 is a schematic diagram of the positional relationship between the alloy porous plate and the module frame;
其中，1-吸收塔塔体，2-喷淋层，3-扰流层，4-扰流柱，5-模块框架，6-支撑组件，7-合金多孔板。Among them, 1-absorption tower body, 2-spray layer, 3-disturbance layer, 4-disturbance column, 5-module frame, 6-support component, 7-alloy perforated plate.
具体实施方式detailed description
下面结合附图详细说明本实用新型的优选技术方案。The preferred technical solutions of the utility model will be described in detail below in conjunction with the accompanying drawings.
如图1所示，本实用新型的一种扰流脱硫吸收塔，包括吸收塔塔体1，所述吸收塔塔体1内具有喷淋层2，在喷淋层2下方设置扰流持液层，所述扰流持液层包括上下依次设置的若干层扰流层3，每层扰流层3又由多根相互平行的扰流柱4组成，每层扰流层3中的多根扰流柱4均处于同一水平高度设置，所述扰流柱4的两头分别固定在吸收塔塔体1内壁上；上下相邻的两层扰流层3中的扰流柱4相互平行并交错设置，即下层扰流层3中的扰流柱4始终保持在上层扰流层3中的相邻两根扰流柱4之间的间隙下方；含SO2和微细粉尘的待净化烟气从烟气进口引入吸收塔内，与从喷淋层2喷淋下来的雾化浆液逆向接触，使烟气中的SO2被吸收液吸收，同时微细粉尘被捕集。扰流层3布置在烟气进口和喷淋层2之间的吸收区中。扰流层的层数为2~4层，以3层为宜。As shown in Figure 1, a turbulent flow desulfurization absorption tower of the present utility model includes an absorption tower body 1, a spray layer 2 is provided in the absorption tower body 1, and a turbulent flow holding liquid is arranged below the spray layer 2. The turbulent liquid-holding layer includes several turbulent layers 3 arranged up and down in sequence, and each turbulent layer 3 is composed of a plurality of turbulent columns 4 parallel to each other. The spoiler columns 4 are set at the same level, and the two ends of the spoiler columns 4 are respectively fixed on the inner wall of the absorption tower body 1; the spoiler columns 4 in the upper and lower adjacent two layers of spoiler layers 3 are parallel to each other and staggered Setting, that is, the spoiler column 4 in the lower spoiler layer 3 is always kept below the gap between two adjacent spoiler columns 4 in the upper spoiler layer 3; the flue gas to be purified containing SO2 and fine dust from The flue gas inlet is introduced into the absorption tower, and is in reverse contact with the atomized slurry sprayed from the spray layer2 , so that the SO2 in the flue gas is absorbed by the absorption liquid, and the fine dust is captured at the same time. The spoiler layer 3 is arranged in the absorption zone between the flue gas inlet and the spray layer 2 . The number of layers of the spoiler layer is 2 to 4 layers, preferably 3 layers.
进一步的，在扰流持液层中平均分布多个模块框架5，所述模块框架5由四块外框围绕组成，外框为平行于气流方向的竖板结构，其截面为矩形结构；安装模块框架5时，每层扰流层3上的扰流柱4则安装在模块框架5内，扰流柱4则固定在外框上；所述模块框架5上设置用于固定在吸收塔塔体1上的支撑组件6；所述模块框架5的矩形结构截面的长宽比为1:1~2:1。Further, a plurality of module frames 5 are evenly distributed in the turbulent liquid-holding layer, and the module frames 5 are surrounded by four outer frames. The outer frame is a vertical plate structure parallel to the air flow direction, and its cross-section is a rectangular structure; When the module frame 5 is used, the spoiler column 4 on each spoiler layer 3 is installed in the module frame 5, and the spoiler column 4 is fixed on the outer frame; the module frame 5 is arranged to be fixed on the absorption tower body 1 on the support assembly 6; the aspect ratio of the rectangular structural section of the module frame 5 is 1:1~2:1.
进一步的，所述扰流柱4截面直径为40mm~100mm，每层扰流层3中相邻的两根扰流柱4之间间距为20mm~150mm，上下相邻的两层扰流层3之间的间距为40mm~150mm。Further, the cross-sectional diameter of the spoiler column 4 is 40mm~100mm, the distance between two adjacent spoiler columns 4 in each spoiler layer 3 is 20mm~150mm, and the upper and lower adjacent two spoiler layers 3 The distance between them is 40mm~150mm.
在模块框架5靠近吸收塔塔体1的内壁处设置合金多孔板7，合金多孔板7作为模块框架5在吸收塔塔体1内边缘的填充，一方面可以使边壁部分的烟气得到有效整流，同时大量的吸收浆液也在开孔处形成了一个持液液膜，从而使烟气在穿过这个持液液膜时实现SO2的有效吸收和微细粉尘的有效捕集。The alloy perforated plate 7 is arranged at the inner wall of the module frame 5 close to the absorption tower body 1, and the alloy perforated plate 7 is used as the filling of the module frame 5 on the inner edge of the absorption tower body 1. On the one hand, the flue gas in the side wall part can be effectively obtained. At the same time, a large amount of absorption slurry also forms a liquid-holding liquid film at the opening, so that when the flue gas passes through the liquid- holding liquid film, the effective absorption of SO2 and the effective capture of fine dust can be achieved.
虽然本实用新型以前述的实例描述如上，但其并不能用以限定本实用新型。本实用新型所属技术领域中的普通技术人员，在不脱离本实用新型的精神和范围内，做些许的改动与修饰，都在本实用新型的保护范围内。因此本实用新型的保护范围当以权利要求所界定者为准。Although the utility model is described above with the aforementioned examples, it cannot be used to limit the utility model. Those of ordinary skill in the technical field to which the utility model belongs can make some changes and modifications without departing from the spirit and scope of the utility model, all of which are within the protection scope of the utility model. Therefore, the protection scope of the present utility model should be defined by the claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520902195.9UCN205127730U (en) | 2015-11-13 | 2015-11-13 | Desulfurization absorption tower with liquid layer is held to vortex |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520902195.9UCN205127730U (en) | 2015-11-13 | 2015-11-13 | Desulfurization absorption tower with liquid layer is held to vortex |
| Publication Number | Publication Date |
|---|---|
| CN205127730Utrue CN205127730U (en) | 2016-04-06 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520902195.9UExpired - Fee RelatedCN205127730U (en) | 2015-11-13 | 2015-11-13 | Desulfurization absorption tower with liquid layer is held to vortex |
| Country | Link |
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| CN (1) | CN205127730U (en) |
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| CN112452291A (en)* | 2020-10-27 | 2021-03-09 | 中国科学院过程工程研究所 | Staggered double-layer supporting plate, tower equipment and application |
| CN112827333A (en)* | 2020-12-21 | 2021-05-25 | 国家能源蓬莱发电有限公司 | Atomization absorption synergistic device of wet flue gas desulfurization absorption tower |
| CN114082264A (en)* | 2021-10-08 | 2022-02-25 | 苏州西热节能环保技术有限公司 | Flue gas dust removal device |
| CN114345113A (en)* | 2022-03-21 | 2022-04-15 | 浙江浩普环保工程有限公司 | Strong mass transfer self-adaptation absorption tower |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112452291A (en)* | 2020-10-27 | 2021-03-09 | 中国科学院过程工程研究所 | Staggered double-layer supporting plate, tower equipment and application |
| CN112827333A (en)* | 2020-12-21 | 2021-05-25 | 国家能源蓬莱发电有限公司 | Atomization absorption synergistic device of wet flue gas desulfurization absorption tower |
| CN114082264A (en)* | 2021-10-08 | 2022-02-25 | 苏州西热节能环保技术有限公司 | Flue gas dust removal device |
| CN114082264B (en)* | 2021-10-08 | 2023-10-24 | 苏州西热节能环保技术有限公司 | Flue gas dust removal device |
| CN114345113A (en)* | 2022-03-21 | 2022-04-15 | 浙江浩普环保工程有限公司 | Strong mass transfer self-adaptation absorption tower |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | Denomination of utility model:Desulfurization absorption tower with liquid layer is held to vortex Effective date of registration:20181120 Granted publication date:20160406 Pledgee:Bank of Beijing Limited by Share Ltd. Nanjing branch Pledgor:JIANGSU ZHONGSHUN ENERGY CONSERVATION TECHNOLOGY CO.,LTD. Registration number:2018320000322 | |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | Date of cancellation:20200911 Granted publication date:20160406 Pledgee:Bank of Beijing Limited by Share Ltd. Nanjing branch Pledgor:JIANGSU ZHONGSHUN ENERGY CONSERVATION TECHNOLOGY Co.,Ltd. Registration number:2018320000322 | |
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20160406 | |
| CF01 | Termination of patent right due to non-payment of annual fee |