Coal chemical industry flue gas waste heat recovery device

Abstract

The utility model discloses a coal chemical industry flue gas waste heat recovery device which comprises a pretreatment device, a flue gas inlet, a filter box, a waste heat recovery device and an exhaust port, the pretreatment device comprises a pretreatment assembly and a collection box, the collection box is arranged at the lower end of the pretreatment assembly and connected with the pretreatment assembly, and the waste heat recovery device is connected with the exhaust port. The smoke inlet is connected with one end of the pretreatment assembly; the filter box is connected with the other end of the pretreatment assembly; the waste heat recovery device comprises a waste heat recovery assembly, and the waste heat recovery assembly is connected with one end of the filter box. Therefore, the pretreatment assembly can preliminarily separate coarse particles in the flue gas, the multiple filter layers in the filter box can further remove fine particles, it is ensured that the discharged flue gas reaches the environmental protection standard, meanwhile, the waste heat recovery assembly absorbs waste heat in the flue gas through the heat exchanger and converts the waste heat into available heat energy, and the heat energy is recycled. The filter layer in the filter box adopts a pluggable design, so that a user can conveniently replace or clean the filter layer according to needs.

Description

Technical Field

[0001] This utility model relates to the technical field of coal chemical industry, and in particular to a waste heat recovery device for coal chemical flue gas. Background Technology

[0002] The coal chemical industry, as an important sector for energy conversion and chemical production, inevitably generates large amounts of dust-laden flue gas during its production process. This flue gas not only contains significant amounts of particulate matter and harmful substances, causing serious environmental pollution, but also fails to fully utilize the waste heat resources it contains, resulting in a tremendous waste of energy.

[0003] Currently, although some dust removal equipment exists on the market for treating dust-laden flue gas in coal chemical production processes, these devices often exhibit numerous shortcomings in practical applications. For example, some dust removal equipment has low dust removal efficiency, failing to effectively remove particulate matter and harmful substances from the flue gas, resulting in emissions still posing a threat to the environment. Furthermore, these devices have high maintenance costs, requiring frequent repairs and replacements, increasing operating costs for businesses. Simultaneously, the cleaning and replacement processes are relatively complex, causing inconvenience to production and operations.

[0004] Therefore, developing a device that can effectively recover waste heat from flue gas and efficiently remove dust is particularly important for addressing the dust-laden flue gas problem generated during coal chemical production. This device not only needs to have high-efficiency dust removal capabilities to remove particulate matter and harmful substances from the flue gas and reduce environmental pollution, but also needs to have waste heat recovery capabilities to fully utilize the waste heat resources in the flue gas and improve the energy efficiency of the enterprise. Furthermore, the maintenance costs and ease of cleaning and replacement of the equipment also need to be fully considered and optimized. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, the purpose of this utility model is to propose a waste heat recovery device for coal chemical flue gas. The pretreatment component can initially separate coarse particles in the flue gas, while the multi-layer filter in the filter box can further remove fine particulate matter, ensuring that the emitted flue gas meets environmental protection standards. At the same time, the waste heat recovery component uses a heat exchanger to absorb the waste heat in the flue gas and convert it into usable thermal energy. The filter layer in the filter box adopts a pluggable design, which makes it convenient for users to replace or clean the filter layer as needed.

[0007] To achieve the above objectives, this utility model proposes a waste heat recovery device for coal chemical flue gas, comprising a pretreatment device, a flue gas inlet, a filter box, a waste heat recovery device, and an exhaust port. The pretreatment device includes a pretreatment component and a collection box, wherein the collection box is located at the lower end of the pretreatment component and connected to the pretreatment component, and the flue gas inlet is connected to one end of the pretreatment component; the filter box is connected to the other end of the pretreatment component. The waste heat recovery device includes a waste heat recovery component, wherein the waste heat recovery component is connected to one end of the filter box; and the exhaust port is connected to the other end of the waste heat recovery component.

[0008] This utility model discloses a waste heat recovery device for coal chemical flue gas. The pretreatment component can initially separate coarse particles in the flue gas, while the multi-layer filter in the filter box can further remove fine particles, ensuring that the emitted flue gas meets environmental protection standards. At the same time, the waste heat recovery component uses a heat exchanger to absorb the waste heat in the flue gas and convert it into usable thermal energy. The filter layer in the filter box adopts a pluggable design, which makes it convenient for users to replace or clean the filter layer as needed.

[0009] In addition, the waste heat recovery device for coal chemical flue gas proposed in the above application may also have the following additional technical features:

[0010] Specifically, the pretreatment assembly includes a treatment box, two coarse particle separators, a connecting pipe, a first air pipe, and two valves. The treatment box is connected to the smoke inlet; the two coarse particle separators are disposed inside the treatment box; one end of the connecting pipe is connected to the treatment box, and the other end is connected to the collection box; one end of the first air pipe is connected to the top of the treatment box, and the other end is connected to one side of the top of the collection box; the two valves are respectively disposed on the first air pipe.

[0011] Specifically, the filter box is provided with a first filter layer, a second filter layer and a third filter layer in sequence, and the first filter layer, the second filter layer and the third filter layer can be inserted into the filter box.

[0012] Specifically, the waste heat recovery assembly includes a recovery tank, a second gas pipe, a waste heat recovery tank, a recovery pipe, a filter plate, and a heat exchanger. One end of the second gas pipe is connected to one end of the filter box, and the other end is connected to the recovery tank. The waste heat recovery tank is located at the lower end of the recovery tank. One end of the recovery pipe is connected to the bottom of the recovery tank, and the other end is connected to the top of the waste heat recovery tank. The filter plate is located at the top inside the waste heat recovery tank, and below the recovery pipe. The heat exchanger is located inside the waste heat recovery tank.

[0013] Specifically, the exhaust port is connected to the waste heat recovery tank and is also connected to the outside.

[0014] The advantages of this invention compared to existing technologies are as follows:

[0015] (1) The pretreatment component can initially separate coarse particles in the flue gas, while the multi-layer filter in the filter box can further remove fine particles, ensuring that the emitted flue gas meets environmental protection standards. At the same time, the waste heat recovery component uses a heat exchanger to absorb the waste heat in the flue gas and convert it into usable thermal energy, thereby improving energy utilization efficiency.

[0016] (2) The filter layer inside the filter box adopts a pluggable design, which makes it convenient for users to replace or clean the filter layer as needed, ensuring the continuous and efficient operation of the device.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a perspective view of a waste heat recovery device for coal chemical flue gas according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a waste heat recovery device for coal chemical flue gas according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the planar structure of a waste heat recovery device for coal chemical flue gas according to one embodiment of the present invention.

[0022] As shown in the figure: 1. Pretreatment device; 2. Smoke inlet; 3. Filter box; 4. Waste heat recovery device; 5. Exhaust port; 11. Pretreatment assembly; 12. Collection box; 41. Waste heat recovery assembly; 111. Processing box; 112. Coarse particle separator; 113. Connecting pipe; 114. First gas pipe; 115. Valve; 31. First filter layer; 32. Second filter layer; 33. Third filter layer; 411. Recovery tank; 412. Second gas pipe; 413. Waste heat recovery tank; 414. Recovery pipe; 415. Filter plate; 416. Heat exchanger. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0024] The following description, in conjunction with the accompanying drawings, describes a waste heat recovery device for coal chemical flue gas according to an embodiment of the present invention.

[0025] like Figures 1-3 As shown in the figure, a waste heat recovery device for coal chemical flue gas according to an embodiment of the present invention includes a pretreatment device 1, a flue gas inlet 2, a filter box 3, a waste heat recovery device 4, and an exhaust port 5. The pretreatment device 1 includes a pretreatment component 11 and a collection box 12. The collection box 12 is disposed at the lower end of the pretreatment component 11 and connected to the pretreatment component 11. The flue gas inlet 2 is connected to one end of the pretreatment component 11, and the filter box 3 is connected to the other end of the pretreatment component 11. The waste heat recovery device 4 includes a waste heat recovery component 41. The waste heat recovery component 41 is connected to one end of the filter box 3, and the exhaust port 5 is connected to the other end of the waste heat recovery component 41.

[0026] It is understood that the pretreatment component 11 is the core of the pretreatment device 1. Its main function is to receive the coal chemical flue gas entering from the flue gas inlet 2 and to perform preliminary treatment on the flue gas to remove large particulate impurities and some pollutants.

[0027] The collection box 12 is located at the lower end of the pretreatment component 11 and is closely connected to it. Its function is to collect impurities and particulate matter separated from the flue gas during the pretreatment process for subsequent treatment or disposal.

[0028] The flue gas inlet 2 is the entrance for the coal chemical flue gas to enter the entire waste heat recovery device 4. It is directly connected to one end of the pretreatment component 11, ensuring that the flue gas can smoothly enter the pretreatment device 1 for preliminary treatment.

[0029] The filter box 3 is located between the pretreatment device 1 and the waste heat recovery device 4, and is connected to the other end of the pretreatment component 11. Its main function is to further remove fine particulate matter from the pretreated flue gas, ensuring that the flue gas entering the waste heat recovery device 4 is cleaner, thereby reducing wear and clogging of the waste heat recovery component 41.

[0030] The waste heat recovery component 41 is the core part of the waste heat recovery device 4 and is connected to one end of the filter box 3. It uses heat exchangers and other equipment to transfer the waste heat in the filtered flue gas to other media (such as water, air or steam), thereby realizing the recovery and utilization of waste heat.

[0031] The exhaust port 5 is located at the other end of the waste heat recovery component 41 and is the outlet of the entire waste heat recovery device 4. It realizes the recovery and conversion of waste heat in flue gas into usable thermal energy.

[0032] In one embodiment of this utility model, such as Figure 2 As shown, the pretreatment component 11 includes a treatment box 111, two coarse particle separators 112, a connecting pipe 113, a first air pipe 114, and two valves 115. The treatment box 111 is connected to the smoke inlet 2. The two coarse particle separators 112 are disposed inside the treatment box 111. One end of the connecting pipe 113 is connected to the treatment box 111, and the other end is connected to the collection box 12. One end of the first air pipe 114 is connected to the top of the treatment box 111, and the other end is connected to one side of the top of the collection box 12. The two valves 115 are respectively disposed on the first air pipe 114.

[0033] It is understood that the treatment box 111 is the main part of the pretreatment component 11, which is directly connected to the flue gas inlet 2 and receives the flue gas generated from the coal chemical process. The treatment box 111 is designed with appropriate flow channels to ensure that the flue gas can be evenly distributed and flow through the subsequent treatment units.

[0034] In this embodiment, two coarse particle separators 112 are installed inside the processing box 111. These separators utilize physical principles such as gravity and inertia to separate large particulate impurities (such as coal dust and ash) from the flue gas. The design of the coarse particle separators 112 effectively reduces the load on subsequent processing units and improves the efficiency of the entire pretreatment assembly 11.

[0035] One end of the connecting pipe 113 is connected to the processing tank 111, and the other end is connected to the collection tank 12. Its main function is to guide the impurities and particulate matter separated from the coarse particle separator 112 into the collection tank 12 for subsequent processing or disposal.

[0036] One end of the first gas pipe 114 is connected to the top of the processing box 111, and the other end is connected to one side of the top of the collection box 12. During the pretreatment process, some of the pre-treated flue gas may enter the top area of ​​the collection box 12 through the first gas pipe 114 to achieve more thorough impurity separation and collection. In addition, the first gas pipe 114 may also serve to balance the internal pressure of the processing box 111 and the collection box 12.

[0037] In this embodiment, two valves 115 are respectively installed on the first gas pipe 114. The function of these valves is to control the flow of flue gas in the first gas pipe 114 so as to adjust or optimize the pretreatment process when necessary.

[0038] In one embodiment of this utility model, such as Figure 3 As shown, the filter box 3 is provided with a first filter layer 31, a second filter layer 32 and a third filter layer 33 in sequence, and the first filter layer 31, the second filter layer 32 and the third filter layer 33 can be inserted into the filter box 3.

[0039] It is understood that the first filter layer 31 is the first layer of filter media within the filter box 3, located near the inlet of the filter box 3. The main function of the first filter layer 31 is to remove larger particles and impurities from the flue gas, such as dust and fibers. If these particles directly enter subsequent filter layers, they may cause blockage or abrasion of the filter media, reducing filtration efficiency. Therefore, the placement of the first filter layer 31 is crucial for protecting subsequent filter layers and ensuring the smooth operation of the entire filtration process.

[0040] The second filter layer 32, located after the first filter layer 31, is the second layer of filter media within the filter box 3. Compared to the first filter layer 31, the second filter layer 32 has a higher filtration precision, capable of removing finer particulate matter from flue gas, such as PM2.5 and PM10. These fine particulate matter pose significant risks to human health and the atmospheric environment; therefore, further purification through the second filter layer 32 can significantly reduce the pollutant content in the flue gas.

[0041] The third filter layer 33 is the last layer of filter media in the filter box 3, located after the second filter layer 32. The third filter layer 33 is usually made of a higher grade of filter material, which can ensure that the flue gas entering the waste heat recovery device 4 meets extremely high cleanliness standards, thereby protecting the waste heat recovery component 41 from contamination and clogging.

[0042] Plug-in design:

[0043] In this embodiment, the first filter layer 31, the second filter layer 32, and the third filter layer 33 are all designed to be plugged into the filter housing 3. This design allows users to easily replace or clean the filter layers without disassembling the entire filter housing 3. This not only improves maintenance convenience but also reduces maintenance costs and time. Furthermore, the pluggable design allows users to select appropriate filter layer materials and specifications according to actual needs to meet filtration requirements under different operating conditions.

[0044] In one embodiment of this utility model, such as Figure 2As shown, the waste heat recovery assembly 41 includes a recovery tank 411, a second gas pipe 412, a waste heat recovery tank 413, a recovery pipe 414, a filter plate 415, and a heat exchanger 416. One end of the second gas pipe 412 is connected to one end of the filter box 3, and the other end is connected to the recovery tank 411. The waste heat recovery tank 413 is located at the lower end of the recovery tank 411. One end of the recovery pipe 414 is connected to the bottom of the recovery tank 411, and the other end is connected to the top of the waste heat recovery tank 413. The filter plate 415 is located at the top inside the waste heat recovery tank 413 and is located below the recovery pipe 414. The heat exchanger 416 is located inside the waste heat recovery tank 413. The exhaust port 5 is connected to the waste heat recovery tank 413 and is connected to the outside.

[0045] As can be understood, the recovery tank 411 is the inlet portion of the waste heat recovery assembly 41, and it is directly connected to one end of the filter box 3. The pre-treated and filtered flue gas enters the recovery tank 411 through the second gas pipe 412, where it undergoes initial accumulation and buffering. The design of the recovery tank 411 helps ensure that the flue gas can smoothly and evenly enter the subsequent waste heat recovery process.

[0046] The second gas pipe 412 is a key component connecting the filter box 3 and the recovery tank 411. One end of it is connected to the outlet of the filter box 3, and the other end extends into the recovery tank 411. Through the second gas pipe 412, the purified flue gas is smoothly introduced into the recovery tank 411, providing the necessary conditions for the subsequent waste heat recovery process.

[0047] The waste heat recovery tank 413 is the main part of the waste heat recovery assembly 41, and it is located at the lower end of the recovery tank 411. The waste heat recovery tank 413 is internally designed with heat exchangers and other equipment to transfer the waste heat from the flue gas to other media (such as water, air, or steam). Simultaneously, the waste heat recovery tank 413 also plays a role in further purifying and treating the flue gas, ensuring that the flue gas emitted into the atmosphere meets environmental standards.

[0048] The recovery pipe 414 is an important component connecting the recovery tank 411 and the waste heat recovery tank 413. One end of it is connected to the bottom of the recovery tank 411, and the other end extends into the top of the waste heat recovery tank 413. Through the recovery pipe 414, the flue gas accumulated in the recovery tank 411 is smoothly introduced into the waste heat recovery tank 413 for subsequent waste heat recovery and treatment.

[0049] The filter plate 415 is located at the top of the waste heat recovery tank 413 and below the recovery pipe 414. Its main function is to further remove fine particulate matter and pollutants from the flue gas, ensuring that the flue gas entering the heat exchanger is cleaner. This effectively prevents the heat exchanger from becoming clogged or worn, extending its service life.

[0050] The heat exchanger 416 is a key component of the waste heat recovery assembly 41, and it is located inside the waste heat recovery tank 413. The heat exchanger utilizes the principle of heat conduction to transfer waste heat from the flue gas to other media (such as water, air, or steam), thereby achieving waste heat recovery and utilization. Through the heat exchanger's processing, the temperature of the flue gas is significantly reduced, and the recovered heat energy can be used for other processes or heating applications.

[0051] It should be noted that the control method of this application can be automatically controlled by a controller. The control method of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical structures, so the control method and circuit connection will not be explained in detail here.

[0052] Detailed usage procedures and operation methods:

[0053] I. Launch and Preparation Phase

[0054] 1. Check the integrity of the device:

[0055] Confirm that all components of the coal chemical flue gas waste heat recovery device 4 (pretreatment device 1, flue gas inlet 2, filter box 3, waste heat recovery device 4, exhaust port 5, etc.) are fully installed and securely connected.

[0056] 2. Turn on the pretreatment device:

[0057] Open the inlet of the processing box 111 of the pretreatment component 11 to ensure that the smoke inlet 2 is unobstructed.

[0058] Check that the coarse particle separator 112 is clean and free of blockages.

[0059] Confirm that the connecting pipe 113, the first air pipe 114, and the valve 115 are in normal working condition.

[0060] 3. Start the filter box:

[0061] Check that the first filter layer 31, the second filter layer 32, and the third filter layer 33 are installed in place and are undamaged.

[0062] Confirm that the inlet and outlet valves of filter box 3 are open, and prepare to receive the pretreated flue gas.

[0063] 4. Prepare a waste heat recovery device:

[0064] Check whether the inside of the recovery tank 411 and the waste heat recovery tank 413 is clean and free of residue.

[0065] Confirm that the recovery pipe 414, filter plate 415 and heat exchanger 416 are installed correctly and are not loose.

[0066] Open the inlet and outlet valves of the waste heat recovery tank 413 to prepare to receive the flue gas from the filter box 3.

[0067] II. Flue Gas Treatment and Waste Heat Recovery Stage

[0068] 1. Flue gas enters the pretreatment unit:

[0069] The coal chemical flue gas enters the treatment box 111 of the pretreatment component 11 through the flue gas inlet 2.

[0070] The flue gas undergoes preliminary treatment in the treatment box 111 by the coarse particle separator 112, where large particulate impurities are separated and fall into the collection box 12.

[0071] 2. Flue gas enters the filter box:

[0072] The flue gas passes through the first filter layer 31, the second filter layer 32 and the third filter layer 33 in sequence to remove fine particulate matter.

[0073] 3. Flue gas enters the waste heat recovery device:

[0074] The filtered clean flue gas enters the recovery tank 411 through the second gas pipe 412.

[0075] The flue gas is collected and buffered in the recovery tank 411, and then enters the waste heat recovery tank 413 through the recovery pipe 414.

[0076] The flue gas is further purified by the filter plate 415 in the waste heat recovery tank 413 to ensure the quality of the flue gas entering the heat exchanger 416.

[0077] 4. Waste heat recovery and utilization:

[0078] Flue gas exchanges heat with a heat exchange medium (such as water, air or steam) in heat exchanger 416, transferring waste heat to the medium.

[0079] After heat exchange, the flue gas temperature decreases, meeting environmental emission standards, and is then discharged into the external environment through exhaust port 5.

[0080] The recovered heat energy can be used for other processes, heating, and other purposes, thus realizing the reuse of energy.

[0081] III. Shutdown and Maintenance Phase

[0082] 1. Shutdown device:

[0083] When coal chemical production ends or when shutdown for maintenance is required, the inlet and outlet valves of the flue gas inlet 2, pretreatment device 1, filter box 3, and waste heat recovery device 4 should be closed in sequence.

[0084] Disconnect the power supply and ensure the device is in a safe condition.

[0085] 2. Cleaning and maintenance:

[0086] Regularly clean the impurities and particles in the collection box 12 to keep the pretreatment component 11 clean.

[0087] Inspect and replace the filter layer inside filter box 3 to ensure filtration effectiveness.

[0088] Clean the accumulated dust and residue inside the waste heat recovery tank 413, and keep the heat exchanger 416 clean and unobstructed.

[0089] Inspect and maintain all connecting pipes and valves to ensure they are functioning properly.

[0090] In summary, the waste heat recovery device for coal chemical flue gas of this utility model embodiment has a pretreatment component that can initially separate coarse particles in the flue gas, while the multi-layer filter layer in the filter box can further remove fine particulate matter, ensuring that the emitted flue gas meets environmental protection standards. At the same time, the waste heat recovery component uses a heat exchanger to absorb the waste heat in the flue gas and convert it into usable thermal energy. The filter layer in the filter box adopts a pluggable design, which makes it convenient for users to replace or clean the filter layer as needed.

[0091] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waste heat recovery device for coal chemical flue gas, characterized in that, It includes a pretreatment device (1), a flue gas inlet (2), a filter box (3), a waste heat recovery device (4), and an exhaust port (5), wherein, The pretreatment device (1) includes a pretreatment component (11) and a collection box (12), wherein, The collection box (12) is located at the lower end of the pretreatment component (11) and connected to the pretreatment component (11), and the smoke inlet (2) is connected to one end of the pretreatment component (11); The filter box (3) is connected to the other end of the pretreatment component (11); The waste heat recovery device (4) includes a waste heat recovery component (41), wherein, The waste heat recovery component (41) is connected to one end of the filter box (3); The exhaust port (5) is connected to the other end of the waste heat recovery assembly (41).

2. The waste heat recovery device for coal chemical flue gas according to claim 1, characterized in that, The pretreatment assembly (11) includes a treatment box (111), two coarse particle separators (112), a connecting pipe (113), a first air pipe (114), and two valves (115), wherein, The processing box (111) is connected to the smoke inlet (2); Two of the coarse particle separators (112) are disposed inside the processing tank (111); One end of the connecting pipe (113) is connected to the processing box (111), and the other end is connected to the collection box (12); One end of the first air tube (114) is connected to the top of the processing box (111), and the other end is connected to one side of the top of the collection box (12); The two valves (115) are respectively installed on the first air pipe (114).

3. The waste heat recovery device for coal chemical flue gas according to claim 1, characterized in that, The filter box (3) is provided with a first filter layer (31), a second filter layer (32) and a third filter layer (33) in sequence. The first filter layer (31), the second filter layer (32) and the third filter layer (33) can be inserted into the filter box (3).

4. The waste heat recovery device for coal chemical flue gas according to claim 1, characterized in that, The waste heat recovery assembly (41) includes a recovery tank (411), a second gas pipe (412), a waste heat recovery tank (413), a recovery pipe (414), a filter plate (415), and a heat exchanger (416), wherein, One end of the second air pipe (412) is connected to one end of the filter box (3), and the other end is connected to the recovery tank (411); The waste heat recovery tank (413) is located at the lower end of the recovery tank (411); One end of the recovery pipe (414) is connected to the bottom of the recovery tank (411), and the other end is connected to the top of the waste heat recovery tank (413); The filter plate (415) is disposed at the top inside the waste heat recovery tank (413), and the filter plate (415) is located below the recovery pipe (414); The heat exchanger (416) is installed inside the waste heat recovery tank (413).

5. The waste heat recovery device for coal chemical flue gas according to claim 4, characterized in that, The exhaust port (5) is connected to the waste heat recovery tank (413) and is connected to the outside.

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