CN115164609A - Fully-sealed roller kiln waste heat utilization system - Google Patents

Abstract

The utility model provides a totally enclosed roller table kiln waste heat utilization system, includes intensification section furnace body and cooling section furnace body, is equipped with the evaporation line on the cooling section furnace body, is equipped with the condensation duct on the intensification section furnace body, is equipped with the intercommunication pipeline between evaporation line and the condensation duct, is equipped with the heat-carrying medium in evaporation line, condensation duct and the intercommunication pipeline. During production, heat-carrying media in the evaporation pipeline absorb heat in the cooling section furnace body and are converted into gaseous state, then the gaseous state enters the condensation pipeline through the communicating pipeline and is condensed and released in the condensation pipeline, so that heat is provided for the heating section furnace body, waste heat utilization of the cooling section furnace body is realized, the heat-carrying media can absorb and release larger heat through two phase change processes of evaporation and condensation, high efficiency utilization of waste heat is realized, the waste heat can be separated from waste gas, the stability of atmosphere in a hearth is ensured, and the heat-carrying media are suitable for a lithium battery anode material fully-sealed roller bed furnace; the condensed heat-carrying medium is changed into liquid and flows back to the evaporation pipeline through the communicating pipe, so that the cyclic utilization is realized.

Description

Translated fromChinese

一种全密封辊道窑炉余热利用系统A fully sealed roller kiln waste heat utilization system

技术领域technical field

本发明涉及烧结设备，尤其涉及一种全密封辊道窑炉余热利用系统，特别适用于生产锂电池正极材料。The invention relates to sintering equipment, in particular to a fully sealed roller kiln waste heat utilization system, which is especially suitable for producing lithium battery positive electrode materials.

背景技术Background technique

目前，辊道窑炉是锂电池正、负极材料的重要生产设备，承担了国内90％以上的生产需求，现有的辊道窑炉多采用电加热方式，耗电量巨大，如何降低辊道窑炉的能耗成为亟待解决的问题。传统的窑炉余热利用系统是把窑尾降温段的热气体通过风机引入到窑头升温段，这种方法热量利用率低，并且需安装引风机，增加了造价。更重要的是锂电池正极材料全密封辊道窑炉对烧结气氛有严格的要求，例如：高镍三元材料烧结气氛要求氧含量在95％左右，磷酸铁锂材料氧气含量小于10ppm。窑尾废气不能直接引入窑头，因此传统的余热利用系统不能应用在锂电池正极材料全密封辊道炉中。At present, the roller kiln is an important production equipment for the positive and negative electrode materials of lithium batteries, which bears more than 90% of the domestic production demand. The existing roller kilns mostly use electric heating, which consumes a lot of electricity. How to reduce the roller kiln? The energy consumption of the kiln has become an urgent problem to be solved. The traditional kiln waste heat utilization system is to introduce the hot gas from the cooling section of the kiln tail to the heating section of the kiln head through a fan. This method has a low heat utilization rate and needs to install an induced draft fan, which increases the cost. More importantly, the fully sealed roller kiln for lithium battery cathode materials has strict requirements on the sintering atmosphere. For example, the sintering atmosphere of high nickel ternary materials requires an oxygen content of about 95%, and the oxygen content of lithium iron phosphate materials is less than 10ppm. The exhaust gas from the kiln tail cannot be directly introduced into the kiln head, so the traditional waste heat utilization system cannot be applied to the fully sealed roller furnace for the cathode material of lithium batteries.

发明内容SUMMARY OF THE INVENTION

本发明要解决的技术问题是克服现有技术的不足，提供一种热量利用率高，可将余热和废气分离，能够应用于锂电池正极材料的全密封辊道窑炉预热利用系统。The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a fully sealed roller kiln preheating utilization system with high heat utilization rate, which can separate waste heat and exhaust gas, and can be applied to lithium battery cathode materials.

为解决上述技术问题，本发明采用以下技术方案：In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

一种全密封辊道窑炉余热利用系统，包括升温段炉体和降温段炉体，所述降温段炉体上设有蒸发管道，所述升温段炉体上设有冷凝管道，所述蒸发管道和所述冷凝管道之间设有连通管道，所述蒸发管道、所述冷凝管道和所述连通管道内设有载热介质。A fully-sealed roller kiln waste heat utilization system includes a heating section furnace body and a cooling section furnace body, an evaporation pipeline is arranged on the cooling section furnace body, and a condensation pipeline is arranged on the heating section furnace body, and the evaporation pipeline is provided on the heating section furnace body. A communication pipe is arranged between the pipe and the condensation pipe, and a heat transfer medium is arranged in the evaporation pipe, the condensation pipe and the communication pipe.

作为上述技术方案的进一步改进：所述连通管道与所述冷凝管道连接的一端高于与所述蒸发管道连接的一端。As a further improvement of the above technical solution, one end of the communication pipe connected with the condensation pipe is higher than the end connected with the evaporation pipe.

作为上述技术方案的进一步改进：所述冷凝管道穿设于所述升温段炉体中，所述蒸发管道穿设于所述降温段炉体中，所述冷凝管道的两端与所述蒸发管道的两端分别通过所述连通管道对应连接。As a further improvement of the above technical solution: the condensation pipeline is penetrated in the furnace body of the heating section, the evaporation pipeline is penetrated in the furnace body of the cooling section, and the two ends of the condensation pipeline are connected to the evaporation pipeline. The two ends are respectively connected through the communication pipes correspondingly.

作为上述技术方案的进一步改进：所述冷凝管道为倒V字形管道。As a further improvement of the above technical solution: the condensation pipeline is an inverted V-shaped pipeline.

作为上述技术方案的进一步改进：所述蒸发管道和所述冷凝管道均设有上下两组，上侧的所述蒸发管道与上侧的所述冷凝管道通过一所述连通管道连接，下侧的所述蒸发管道与下侧的所述冷凝管道通过另一所述连通管道连接。As a further improvement of the above technical scheme: the evaporation pipeline and the condensation pipeline are both provided with two sets of upper and lower groups, the evaporation pipeline on the upper side and the condensation pipeline on the upper side are connected by a communication pipeline, and the evaporation pipeline on the upper side is connected with the condensation pipeline on the upper side. The evaporation duct and the condensation duct on the lower side are connected through the other communication duct.

作为上述技术方案的进一步改进：所述蒸发管道和所述冷凝管道上均设有多片换热翅片。As a further improvement of the above-mentioned technical scheme, multiple heat exchange fins are provided on both the evaporation pipe and the condensation pipe.

作为上述技术方案的进一步改进：所述连通管道位于所述升温段炉体与所述降温段炉体之间的部分包覆有阻热层。As a further improvement of the above technical solution, the part of the communication pipe between the furnace body of the heating section and the furnace body of the cooling section is covered with a heat resistance layer.

作为上述技术方案的进一步改进：所述阻热层采用耐火材料。As a further improvement of the above technical solution: the heat resistance layer adopts refractory material.

作为上述技术方案的进一步改进：所述载热介质为导热姆、萘或水银。As a further improvement of the above technical scheme: the heat transfer medium is thermal conductive compound, naphthalene or mercury.

作为上述技术方案的进一步改进：所述蒸发管道、所述冷凝管道和所述连通管道内的气压为0.005Mpa-0.02Mpa。As a further improvement of the above technical scheme: the air pressure in the evaporation pipeline, the condensation pipeline and the communication pipeline is 0.005Mpa-0.02Mpa.

与现有技术相比，本发明的优点在于：本发明公开的全密封辊道窑炉余热利用系统，在降温段炉体上设有蒸发管道，在升温段炉体上设有冷凝管道，蒸发管道和冷凝管道通过连通管道连接，各管道内注入载热介质，辊道窑炉系统生产时，蒸发管道内的载热介质在降温段炉体吸收热量转变为气态，然后通过连通管道进入冷凝管道，载热介质在冷凝管道内冷凝放热，从而为升温段炉体提供热量，实现降温段炉体余热利用，载热介质通过蒸发和冷凝两个相变过程，可以吸收和释放较大的热量，实现余热的高效率利用，且可以将余热与废气分离开，能够适用于锂电池正极材料；冷凝后的载热介质转变为液态通过连通管道回流至蒸发管道内，实现循环利用。Compared with the prior art, the advantages of the present invention are: the fully sealed roller kiln waste heat utilization system disclosed in the present invention is provided with an evaporation pipe on the furnace body in the cooling section, and a condensation pipe on the furnace body in the heating section, so that the evaporation The pipeline and the condensing pipeline are connected by the connecting pipeline, and the heating medium is injected into each pipeline. During the production of the roller kiln system, the heating medium in the evaporation pipeline absorbs heat in the cooling section and turns into a gaseous state, and then enters the condensing pipeline through the connecting pipeline. , the heat transfer medium condenses and releases heat in the condensation pipe, so as to provide heat for the furnace body in the heating section and realize the utilization of the waste heat of the furnace body in the cooling section. The heat transfer medium can absorb and release a large amount of heat through the two phase transition processes of evaporation and condensation , to achieve high-efficiency utilization of waste heat, and can separate waste heat from exhaust gas, which can be suitable for lithium battery cathode materials; the condensed heat-carrying medium is converted into a liquid state and returned to the evaporation pipeline through the communication pipeline to realize recycling.

附图说明Description of drawings

图1是本发明辊道窑炉系统的立体结构示意图。FIG. 1 is a schematic three-dimensional structure diagram of the roller kiln system of the present invention.

图2是本发明中的升温段炉体的横截面结构示意图。FIG. 2 is a schematic cross-sectional structure diagram of the furnace body in the heating section in the present invention.

图3是本发明中的降温段炉体的横截面结构示意图。FIG. 3 is a schematic cross-sectional structure diagram of the furnace body in the cooling section in the present invention.

图中各标号表示：1、升温段炉体；2、降温段炉体；3、蒸发管道；4、冷凝管道；5、连通管道；6、换热翅片。The symbols in the figure represent: 1. furnace body in heating section; 2. furnace body in cooling section; 3. evaporating pipeline; 4. condensing pipeline; 5. connecting pipeline; 6. heat exchange fins.

具体实施方式Detailed ways

以下结合说明书附图和具体实施例对本发明作进一步详细说明。The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

图1至图3示出了本发明全密封辊道窑炉余热利用系统的一种实施例，本实施例的全密封辊道窑炉余热利用系统，包括升温段炉体1和降温段炉体2，降温段炉体2上设有蒸发管道3，升温段炉体1上设有冷凝管道4，蒸发管道3和冷凝管道4之间设有连通管道5，蒸发管道3、冷凝管道4和连通管道5内装有载热介质(图中未示出，例如可以是导热姆、萘或水银等)。Figures 1 to 3 show an embodiment of the fully-sealed roller kiln waste heat utilization system of the present invention. The fully-sealed roller kiln waste heat utilization system in this embodiment includes afurnace body 1 in a heating section and a furnace body in acooling section 2. Anevaporation pipe 3 is provided on thefurnace body 2 of the cooling section, acondensation pipe 4 is provided on thefurnace body 1 of the heating section, acommunication pipe 5 is provided between theevaporation pipe 3 and thecondensation pipe 4, and theevaporation pipe 3, thecondensation pipe 4 are connected to each other. Thepipe 5 is filled with a heat-carrying medium (not shown in the figure, for example, it can be thermal conductive compound, naphthalene or mercury, etc.).

本实施例的全密封辊道窑炉余热利用系统，在降温段炉体2上设有蒸发管道3，在升温段炉体1上设有冷凝管道4，蒸发管道3和冷凝管道4通过连通管道5连接，各管道内注入载热介质，辊道窑炉余热利用系统在生产时，蒸发管道3内的载热介质在降温段炉体2吸收热量转变为气体，然后通过连通管道5进入冷凝管道4，载热介质在冷凝管道4内冷凝放热，从而为升温段炉体1提供热量，实现降温段炉体2余热利用，载热介质通过蒸发和冷凝两个相变过程，可以吸收和释放较大的热量，实现余热的高效率利用，且可以将余热从废气中分离开，因此能够适用于锂电池正极材料全密封辊道炉；冷凝后的载热介质转变为液态，通过带有坡度的连通管道5回流至蒸发管道3内，实现循环利用。In the fully-sealed roller kiln waste heat utilization system of this embodiment, anevaporation pipeline 3 is arranged on thefurnace body 2 in the cooling section, and acondensation pipeline 4 is arranged on thefurnace body 1 in the heating section, and theevaporation pipeline 3 and thecondensation pipeline 4 pass through the communication pipeline. 5 is connected, and the heat-carrying medium is injected into each pipe. When the waste heat utilization system of the roller kiln is in production, the heat-carrying medium in theevaporation pipe 3 absorbs heat in thefurnace body 2 in the cooling section and turns into gas, and then enters the condensing pipe through thecommunication pipe 5. 4. The heat transfer medium condenses and releases heat in thecondensation pipe 4, so as to provide heat for thefurnace body 1 in the heating section and realize the utilization of the waste heat of thefurnace body 2 in the cooling section. The heat transfer medium can absorb and release through the two phase transition processes of evaporation and condensation. The large heat can realize the high-efficiency utilization of waste heat, and can separate the waste heat from the exhaust gas, so it can be applied to the fully sealed roller furnace of the positive electrode material of lithium battery; Thecommunication pipe 5 of the evaporating pipe returns to theevaporation pipe 3 to realize recycling.

进一步地，本实施例中，连通管道5与冷凝管道4连接的一端高于与蒸发管道3连接的一端。冷凝管道4内冷凝后的液态载热介质可以利用高差回流至蒸发管道3内，无需外加动力源(例如风机、泵等)，有利于简化系统结构，降低成本，同时也不会影响蒸发管道3内的气态载热介质流入冷凝管道4内。Further, in this embodiment, the end of thecommunication pipe 5 connected with thecondensation pipe 4 is higher than the end connected with theevaporation pipe 3 . The liquid heat-carrying medium condensed in thecondensation pipe 4 can be returned to theevaporation pipe 3 by using the height difference, without the need for external power sources (such as fans, pumps, etc.), which is conducive to simplifying the system structure and reducing costs, and will not affect the evaporation pipe. The gaseous heat transfer medium in 3 flows into thecondensation pipe 4 .

进一步地，本实施例中，冷凝管道4穿设于升温段炉体1中，载热介质冷凝后有利于保持沿升温段炉体1横向方向或者说宽度方向放热均匀，且便于冷凝管道4的可靠安装，蒸发管道3穿设于降温段炉体2中，有利于充分吸收降温段炉体2横向方向或者说宽度方向的热量，且便于蒸发管道3的可靠安装，冷凝管道4的两端与蒸发管道3的两端分别通过连通管道5对应连接，整体结构对称性好，有利于保持受力的平衡性及温度的均匀性。Further, in this embodiment, thecondensing pipe 4 is penetrated in thefurnace body 1 of the heating section, and the condensation of the heat transfer medium is conducive to maintaining uniform heat release along the lateral direction or the width direction of thefurnace body 1 in the heating section, and is convenient for the condensingpipe 4. For reliable installation, theevaporation pipe 3 is penetrated in thefurnace body 2 of the cooling section, which is conducive to fully absorbing the heat in the lateral direction or the width direction of thefurnace body 2 in the cooling section, and facilitates the reliable installation of theevaporation pipe 3. Both ends of thecondensation pipe 4 The two ends of theevaporation pipe 3 are respectively connected through thecommunication pipe 5, and the overall structure has good symmetry, which is conducive to maintaining the balance of the force and the uniformity of the temperature.

更进一步地，本实施例中，冷凝管道4为倒V字形管道，也即冷凝管道4中部高而两端逐渐降低，相比于水平结构，有利于液态的载热介质向两端流动进入连通管道5实现回流，结构简单、可靠。冷凝管道4的V字形设计，可提高炉腔内温度均匀性，特别是对于六列宽炉膛效果更佳。Further, in this embodiment, thecondensation pipe 4 is an inverted V-shaped pipe, that is, the middle of thecondensation pipe 4 is high and the two ends are gradually lowered. Compared with the horizontal structure, it is conducive to the flow of the liquid heat transfer medium to the two ends to enter and communicate with each other. Thepipeline 5 realizes the backflow, and the structure is simple and reliable. The V-shaped design of the condensingpipe 4 can improve the temperature uniformity in the furnace cavity, especially for the six-column wide furnace.

作为优选的实施例，蒸发管道3和冷凝管道4均设有上下两组，上侧的蒸发管道3与上侧的冷凝管道4通过一根或多根连通管道5连接，下侧的蒸发管道3与下侧的冷凝管道4通过另一根或多根连通管道5连接。一方面，上下两组蒸发管道3内的载热介质可以充分吸收降温段炉体2的余热，从而进一步提高余热利用效率；另一方面，上下两组蒸发管道3有利于保持升温段炉体1上下两侧的温度均匀。As a preferred embodiment, both theevaporation pipeline 3 and thecondensation pipeline 4 are provided with two upper and lower groups, theevaporation pipeline 3 on the upper side is connected with thecondensation pipeline 4 on the upper side through one ormore communication pipelines 5, and theevaporation pipeline 3 on the lower side is connected by one ormore communication pipelines 5. It is connected with the condensingpipe 4 on the lower side through another one ormore communication pipes 5 . On the one hand, the heat transfer medium in the upper and lower two sets ofevaporation pipes 3 can fully absorb the waste heat of thefurnace body 2 in the cooling section, thereby further improving the utilization efficiency of waste heat; The temperature is uniform on both sides.

作为优选的实施例，蒸发管道3和冷凝管道4上均设有多片换热翅片6，换热翅片6有利于增加蒸发管道3、冷凝管道4的换热面积，从而进一步提高余热利用效率。进一步优选的，换热翅片6采用环形结构或者说环绕在蒸发管道3、冷凝管道4外周，提高圆周方向各处吸热、放热的均匀性。As a preferred embodiment, multipleheat exchange fins 6 are provided on both theevaporation pipe 3 and thecondensation pipe 4, and theheat exchange fins 6 are beneficial to increase the heat exchange area of theevaporation pipe 3 and thecondensation pipe 4, thereby further improving the utilization of waste heat efficiency. Further preferably, theheat exchange fins 6 adopt a ring structure or surround the outer periphery of theevaporation pipe 3 and thecondensation pipe 4, so as to improve the uniformity of heat absorption and heat release in various places in the circumferential direction.

进一步地，本实施例中，连通管道5位于升温段炉体1与降温段炉体2之间的部分包覆有阻热层(图中未示出)，有利于减少载热介质在连通管道5处与外界进行热量交换，有利于保证余热利用效率。Further, in this embodiment, the part of thecommunication pipe 5 located between thefurnace body 1 of the heating section and thefurnace body 2 of the cooling section is covered with a heat resistance layer (not shown in the figure), which is beneficial to reduce the heat transfer medium in the communication pipe. 5 places to exchange heat with the outside world, which is conducive to ensuring the efficiency of waste heat utilization.

作为优选的实施例，阻热层采用耐火材料，使得阻热层能够适应高温环境，提高可靠性。As a preferred embodiment, the heat resistance layer is made of refractory material, so that the heat resistance layer can adapt to a high temperature environment and improve reliability.

进一步地，蒸发管道3、冷凝管道4和连通管道5内的气压为0.005Mpa-0.02Mpa，也即蒸发管道3、冷凝管道4和连通管道5内处于真空状态，防止空气残留，有利于保证系统的运行效率。本实施例中管道内的气压为0.01Mpa，当然在其他实施例中也可小范围进行调整。优选的，可在充入载热介质之后，对管道进行抽真空，使管道内压力保持在0.01Mpa左右。Further, the air pressure in theevaporation pipeline 3, thecondensation pipeline 4 and thecommunication pipeline 5 is 0.005Mpa-0.02Mpa, that is, theevaporation pipeline 3, thecondensation pipeline 4 and thecommunication pipeline 5 are in a vacuum state to prevent air residues and help ensure the system. operating efficiency. In this embodiment, the air pressure in the pipeline is 0.01Mpa, of course, it can also be adjusted in a small range in other embodiments. Preferably, the pipeline can be evacuated after filling the heat transfer medium, so that the pressure in the pipeline can be maintained at about 0.01Mpa.

虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明。任何熟悉本领域的技术人员，在不脱离本发明技术方案范围的情况下，都可利用上述揭示的技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均应落在本发明技术方案保护的范围内。Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent implementation of equivalent changes. example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention should fall within the protection scope of the technical solutions of the present invention without departing from the content of the technical solutions of the present invention.

Claims (10)

Translated fromChinese

1.一种全密封辊道窑炉余热利用系统，包括升温段炉体(1)和降温段炉体(2)，其特征在于：所述降温段炉体(2)上设有蒸发管道(3)，所述升温段炉体(1)上设有冷凝管道(4)，所述蒸发管道(3)和所述冷凝管道(4)之间设有连通管道(5)，所述蒸发管道(3)、所述冷凝管道(4)和所述连通管道(5)内设有载热介质。1. A fully-sealed roller kiln waste heat utilization system, comprising a heating section furnace body (1) and a cooling section furnace body (2), characterized in that: the cooling section furnace body (2) is provided with an evaporation pipeline ( 3), a condensation pipeline (4) is arranged on the furnace body (1) of the heating section, a communication pipeline (5) is arranged between the evaporation pipeline (3) and the condensation pipeline (4), and the evaporation pipeline (3) A heat transfer medium is arranged in the condensation pipe (4) and the communication pipe (5).2.根据权利要求1所述的全密封辊道窑炉余热利用系统，其特征在于：所述连通管道(5)与所述冷凝管道(4)连接的一端高于与所述蒸发管道(3)连接的一端。2. The fully-sealed roller kiln waste heat utilization system according to claim 1, characterized in that: one end of the communication pipe (5) connected with the condensation pipe (4) is higher than the evaporation pipe (3) ) connection end.3.根据权利要求1所述的全密封辊道窑炉余热利用系统，其特征在于：所述冷凝管道(4)穿设于所述升温段炉体(1)中，所述蒸发管道(3)穿设于所述降温段炉体(2)中，所述冷凝管道(4)的两端与所述蒸发管道(3)的两端分别通过所述连通管道(5)对应连接。3. The fully-sealed roller kiln waste heat utilization system according to claim 1, characterized in that: the condensation pipe (4) is penetrated in the furnace body (1) of the heating section, and the evaporation pipe (3) ) is penetrated in the furnace body (2) of the cooling section, and the two ends of the condensation pipe (4) and the two ends of the evaporation pipe (3) are respectively connected correspondingly through the communication pipe (5).4.根据权利要求3所述的全密封辊道窑炉余热利用系统，其特征在于：所述冷凝管道(4)为倒V字形管道。4. The fully-sealed roller kiln waste heat utilization system according to claim 3, characterized in that: the condensation pipe (4) is an inverted V-shaped pipe.5.根据权利要求1所述的全密封辊道窑炉余热利用系统，其特征在于：所述蒸发管道(3)和所述冷凝管道(4)均设有上下两组，上侧的所述蒸发管道(3)与上侧的所述冷凝管道(4)通过一所述连通管道(5)连接，下侧的所述蒸发管道(3)与下侧的所述冷凝管道(4)通过另一所述连通管道(5)连接。5. The fully-sealed roller kiln waste heat utilization system according to claim 1, characterized in that: the evaporation pipeline (3) and the condensation pipeline (4) are provided with two sets of upper and lower The evaporation pipe (3) and the condensation pipe (4) on the upper side are connected by a communication pipe (5), and the evaporation pipe (3) on the lower side and the condensation pipe (4) on the lower side are connected by another pipe. a said communication pipe (5) is connected.6.根据权利要求1至5中任一项所述的全密封辊道窑炉余热利用系统，其特征在于：所述蒸发管道(3)和所述冷凝管道(4)上均设有多片换热翅片(6)。6. The fully-sealed roller kiln waste heat utilization system according to any one of claims 1 to 5, characterized in that: the evaporation pipe (3) and the condensation pipe (4) are provided with multiple sheets Heat exchange fins (6).7.根据权利要求1至5中任一项所述的全密封辊道窑炉余热利用系统，其特征在于：所述连通管道(5)位于所述升温段炉体(1)与所述降温段炉体(2)之间的部分包覆有阻热层。7. The fully-sealed roller kiln waste heat utilization system according to any one of claims 1 to 5, characterized in that: the communication pipe (5) is located between the furnace body (1) in the heating section and the cooling The part between the section furnace bodies (2) is covered with a heat resistance layer.8.根据权利要求7所述的全密封辊道窑炉余热利用系统，其特征在于：所述阻热层采用耐火材料。8 . The waste heat utilization system of a fully sealed roller kiln according to claim 7 , wherein the heat resistance layer is made of refractory materials. 9 .9.根据权利要求1至5中任一项所述的全密封辊道窑炉余热利用系统，其特征在于：所述载热介质为导热姆、萘或水银。9 . The waste heat utilization system of a fully-sealed roller kiln according to claim 1 , wherein the heat-carrying medium is thermal conductivity, naphthalene or mercury. 10 .10.根据权利要求1至5中任一项所述的全密封辊道窑炉余热利用系统，其特征在于：所述蒸发管道(3)、所述冷凝管道(4)和所述连通管道(5)内的气压为0.005Mpa-0.02Mpa。10. The fully-sealed roller kiln waste heat utilization system according to any one of claims 1 to 5, characterized in that: the evaporation pipe (3), the condensation pipe (4) and the communication pipe ( 5) The air pressure inside is 0.005Mpa-0.02Mpa.

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