A waste heat recovery device for thermal power plants

Abstract

The utility model discloses a thermal power plant waste heat recovery device, including base, the top fixed coupling of base has the waste heat recovery jar, the inside of waste heat recovery jar is established and has the waste heat heat exchange cavity. The utility model discloses through base steady support device, the waste heat heat exchange cavity of waste heat recovery jar contains waste heat medium, and the heat exchange column in its surface heat exchange mouth, the heat exchange column connected heat exchange strip and the even heat ring on heat exchange strip, will waste heat transmission to the heat conduction oil in heat exchange cavity, the spiral hot water pipe of alternate in heat exchange cavity, the heating pipe is connected through the connecting head and is connected outside pipeline, and the water in heat conduction oil heating pipe and air, and the heat preservation filler in waste heat recovery jar inboard heat preservation cavity reduces heat loss, and the waste heat recovery efficiency and energy utilization rate are greatly promoted, realize thermal power plant waste heat effective recovery.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology in thermal power plants, specifically a waste heat recovery device for thermal power plants. Background Technology

[0002] During the production process of thermal power generation, a large amount of media carrying waste heat (such as flue gas and steam) are generated. If these waste heat media are directly discharged, it will not only cause serious energy waste, but may also cause certain thermal pollution to the environment. Therefore, waste heat recovery and utilization has become an important link for thermal power plants to improve energy utilization efficiency and implement energy conservation and consumption reduction goals.

[0003] Currently, most waste heat recovery devices used in thermal power plants employ simple heat exchange structures, such as using a single heat exchange tube or plate to exchange waste heat with water, air, or other media. However, these devices generally suffer from low waste heat recovery efficiency: firstly, the waste heat medium is easily unevenly distributed within the heat exchange chamber, resulting in insufficient heat transfer as some areas of the heat exchange components cannot fully contact the waste heat medium; secondly, the heat exchange area of ​​the heat exchange components is limited, and there is a lack of effective heat equalization structures, leading to localized heat accumulation or loss during the transfer process, making it difficult to efficiently transfer heat to the media to be heated (such as cold water or cold air). Furthermore, the insulation measures in existing devices are often quite simple, resulting in significant heat loss during the heat exchange process, further reducing the overall waste heat recovery efficiency. These combined problems make it difficult for existing devices to meet the high-efficiency waste heat recovery requirements of thermal power plants.

[0004] Therefore, there is a need to provide a waste heat recovery device for thermal power plants to solve this problem. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a waste heat recovery device for thermal power plants, which has the advantages of high waste heat recovery efficiency, adaptability to changes in operating conditions, effective handling of impurities, and stable operation. It solves the problems of insufficient waste heat transfer, serious heat loss leading to low recovery efficiency, and poor operational stability due to the inability to flexibly adjust according to fluctuations in waste heat medium parameters in existing waste heat recovery devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for a thermal power plant, comprising a base, a waste heat recovery tank fixedly connected to the top of the base, a waste heat exchange chamber inside the waste heat recovery tank, a plurality of annularly and uniformly arranged heat exchange ports on the surface of the waste heat exchange chamber, a heat exchange chamber inside the waste heat recovery tank and the heat exchange ports communicating with each other, a heat exchange column installed inside the heat exchange ports, a heat exchange strip fixedly connected to one end of the heat exchange column on the same axis located in the heat exchange chamber, and a plurality of uniformly arranged heat exchange ports fixedly connected to the surface of the heat exchange strip. The heat exchange chamber is filled with heat-conducting oil and contains alternating spiral hot water pipes and heating pipes. The inlet and outlet ends of the hot water pipes and heating pipes extend to the bottom of the waste heat recovery tank and are connected by connectors. The inlet and outlet ends of the hot water pipes and heating pipes are located on opposite sides of the waste heat recovery tank. An insulation chamber is provided inside the waste heat recovery tank and is located outside the heat exchange chamber. The insulation chamber is filled with insulation filler. A connecting flange is fixedly connected to the exhaust end of the waste heat recovery tank.

[0007] As a preferred embodiment of this utility model, the feed inlet of the waste heat recovery tank is connected to a filter box, the top of the filter box is provided with a snap-fit ​​groove, the top of the snap-fit ​​groove is snapped with a snap-fit ​​plate, and a filter screen is fixedly connected to the center of the snap-fit ​​plate, and the filter screen is used in conjunction with the waste heat exchange chamber.

[0008] As a preferred embodiment of this utility model, the snap-fit ​​plate has symmetrical collision grooves on one side, an elastic block is fixedly connected inside the collision groove, and an electric impactor capable of reciprocating motion is symmetrically fixedly connected to the groove wall of the snap-fit ​​groove, and the output end of the electric impactor is used in conjunction with the elastic block. A buffer frame is fixedly connected to the inner wall of the snap-fit ​​groove, and the buffer frame is used in conjunction with the snap-fit ​​plate.

[0009] In a preferred embodiment of this utility model, the snap-fit ​​plate has a drop-out opening on one side of the elastic block, the bottom of the filter box has a collection groove that communicates with the drop-out opening, a dust collection box is slidably connected inside the collection groove, a baffle groove is provided on one side of the filter box and is located between the snap-fit ​​groove and the collision groove, a baffle is slidably connected inside the baffle groove, and a sealing strip is symmetrically fixedly connected to the top of the baffle about the snap-fit ​​groove, and the sealing strip and the baffle groove are sealed together.

[0010] As a preferred embodiment of this utility model, a conical guide block is provided inside the waste heat exchange cavity, and the two ends of the surface of the conical guide block are fixedly connected to the waste heat exchange cavity through a support frame.

[0011] As a preferred embodiment of this utility model, a controller is fixedly connected to the surface of the base, and a human-computer interaction interface is provided on the surface of the controller.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides stable support for the entire device by setting a base. The waste heat recovery tank has a waste heat exchange chamber inside to contain the waste heat medium. Heat exchange columns are installed in the heat exchange ports that are evenly arranged in a ring on the surface of the waste heat exchange chamber. Heat exchange strips are fixed at one end of the heat exchange columns on the same axis. Multiple evenly arranged heat distribution rings are fixed on the surface of the heat exchange strips. The heat exchange chamber is filled with heat transfer oil and has spiral hot water pipes and heating pipes arranged alternately inside. The hot water pipes and heating pipes are connected to external pipelines through connectors. At the same time, the insulation chamber outside the heat exchange chamber inside the waste heat recovery tank is filled with insulation filler. This allows the heat of the waste heat medium to be efficiently transferred to the heat transfer oil through the heat exchange columns, heat exchange strips and heat distribution rings. Then the heat transfer oil fully heats the water and air in the hot water pipes and heating pipes. The spiral structure prolongs the heat exchange time and the insulation filler reduces heat loss, significantly improving the waste heat recovery efficiency and energy utilization rate, and realizing the effective recovery and utilization of waste heat from thermal power plants.

[0014] 2. This utility model connects a filter box to the feed inlet of a waste heat recovery tank. The filter box has a snap-fit ​​groove that snaps onto a snap-fit ​​plate with a filter screen. An elastic block is provided in the collision groove on one side of the snap-fit ​​plate. An electric impactor that can reciprocate is provided on the groove wall. A buffer frame is provided on the inner wall of the snap-fit ​​groove. The snap-fit ​​plate has a drop outlet. A dust collection box is provided in the collection groove at the bottom of the filter box. A baffle with a sealing strip is provided in the baffle groove on one side of the filter box. A conical guide block with a support frame is provided in the waste heat exchange chamber. A controller with a human-machine interface is provided on the base. The filter screen can filter impurities in the waste heat medium. The electric impactor strikes the elastic block, causing the snap-fit ​​plate to vibrate. Impurities fall into the dust collection box through the drop outlet. The baffle and sealing strip prevent impurities from escaping. The conical guide block guides the waste heat medium to be evenly distributed. The controller, combined with a temperature sensor, can monitor and adjust the operation of the device in real time. This not only ensures that the heat exchange components are not blocked by impurities and extends the service life of the equipment, but also ensures that the device operates stably and flexibly adapts to different working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional perspective view of the structure of this utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the heat exchange column, heat exchange bar, and heat distribution ring used in conjunction with this utility model.

[0018] Figure 4 This is an exploded three-dimensional diagram showing the disassembly of the various components of the filter box of this utility model.

[0019] In the diagram: 1. Base; 2. Waste heat recovery tank; 3. Waste heat exchange chamber; 4. Heat exchange column; 5. Heat exchange strip; 6. Heat distribution ring; 7. Hot water pipe; 8. Heating pipe; 9. Connector; 10. Insulation filler; 11. Filter box; 12. Clip plate; 13. Filter screen; 14. Elastic block; 15. Electric impactor; 16. Buffer frame; 17. Drop outlet; 18. Dust collection box; 19. Baffle; 20. Conical guide block; 21. Controller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 4 As shown, this utility model provides a waste heat recovery device for thermal power plants, including a base 1. A waste heat recovery tank 2 is fixedly connected to the top of the base 1. A waste heat exchange chamber 3 is formed inside the waste heat recovery tank 2. Several annularly arranged heat exchange ports are formed on the surface of the waste heat exchange chamber 3. The heat exchange chamber is connected to the heat exchange ports. A heat exchange column 4 is installed inside the heat exchange ports. A heat exchange strip 5 is fixedly connected to one end of the heat exchange column 4 on the same axis in the heat exchange chamber. Several evenly arranged heat-spreading rings 6 are fixedly connected to the surface of the heat exchange strip 5, and the heat-spreading rings 6 are located inside the heat exchange chamber. The waste heat recovery tank 2 is filled with heat transfer oil and has alternating spiral hot water pipes 7 and heating pipes 8 inside. The inlet and outlet ends of the hot water pipes 7 and heating pipes 8 extend to the bottom of the waste heat recovery tank 2 and are connected by connectors 9. The inlet and outlet ends of the hot water pipes 7 and heating pipes 8 are located on both sides of the waste heat recovery tank 2. An insulation cavity is opened on the inner side of the waste heat recovery tank 2 and is located outside the heat exchange chamber. The insulation cavity is filled with insulation filler 10. The exhaust end of the waste heat recovery tank 2 is fixedly connected to a connecting flange, which can be connected to an external multi-stage adjustable turbine to achieve further recovery and utilization of waste heat and improve energy utilization efficiency.

[0022] It should be noted that the multi-stage adjustable turbine is a mature existing technology product. It can further recover and utilize the energy of the exhaust gas (or waste heat medium) discharged from the waste heat recovery tank 2, which still contains a certain amount of energy. That is, after the waste heat medium completes the heat exchange with the hot water pipe 7 and the heating pipe 8 in the waste heat recovery tank 2, although some heat has been transferred to the water / heating system, the discharged exhaust gas (or waste heat medium) still retains a certain amount of thermal and pressure energy. The multi-stage adjustable turbine can use this residual energy to drive the rotor to rotate, converting thermal and pressure energy into mechanical energy, which can then drive a generator to generate electricity (realizing waste heat power generation), or drive other auxiliary equipment (such as fans, pumps, etc.). This system avoids the direct waste of this energy, making the waste heat recovery chain of the device more complete and significantly improving the overall energy utilization rate. In addition, the waste heat emissions of thermal power plants usually fluctuate with changes in unit load and operating conditions (such as unstable temperature, pressure, and flow rate of waste heat medium). The "multi-stage adjustable" characteristic allows the turbine to adapt to changes in energy input under different operating conditions by adjusting parameters such as the blade angle and air intake of each stage. This ensures that the turbine can still operate stably and recover energy efficiently when the parameters of the waste heat medium fluctuate, avoiding equipment overload or sudden drop in efficiency due to sudden changes in operating conditions, and improving the adaptability of the entire waste heat recovery system to the operating conditions of the power plant.

[0023] refer to Figure 1 and Figure 4 The feed inlet of the waste heat recovery tank 2 is connected to a filter box 11. The top of the filter box 11 is provided with a snap-fit ​​groove, and a snap-fit ​​plate 12 is snapped into the top of the snap-fit ​​groove. A filter screen 13 is fixedly connected to the center of the snap-fit ​​plate 12, and the filter screen 13 is used in conjunction with the waste heat exchange chamber 3. A fixing strip is symmetrically hinged to the top of the filter box 11, and the fixing strip is used in conjunction with the snap-fit ​​plate 12.

[0024] As a technical optimization of this utility model, by setting up a filter box 11, a snap-fit ​​plate 12 and a filter screen 13, the waste heat medium is effectively filtered, avoiding impurities from affecting the heat exchange effect. At the same time, the snap-fit ​​structure makes it easy to disassemble and replace the filter screen 13, reducing the maintenance difficulty. The setting of the fixing strip further enhances the stability of the snap-fit ​​plate 12 installation and ensures the reliable operation of the filtration mechanism.

[0025] refer to Figure 4 The snap-fit ​​plate 12 has symmetrical collision grooves on one side. An elastic block 14 is fixedly connected inside the collision groove. An electric impactor 15 that can reciprocate is fixedly connected symmetrically to the groove wall of the snap-fit ​​plate 12. The output end of the electric impactor 15 is used in conjunction with the elastic block 14. A buffer frame 16 is fixedly connected to the inner wall of the snap-fit ​​plate 12. The buffer frame 16 is used in conjunction with the snap-fit ​​plate 12.

[0026] As a technical optimization of this utility model, the automatic dust removal function of the filter screen 13 is realized through the cooperation of the electric impactor 15, the elastic block 14 and the buffer frame 16, which eliminates the need for frequent manual disassembly and cleaning, reducing the cost of manual maintenance. At the same time, the setting of the buffer frame 16 extends the service life of the snap plate 12 and the snap groove, ensuring the long-term stable operation of the filtration mechanism.

[0027] refer to Figure 4 The snap-fit ​​plate 12 is located on one side of the elastic block 14 and has a drop-out opening 17. The bottom of the filter box 11 has a collection groove, which is connected to the drop-out opening 17. A dust collection box 18 is slidably connected inside the collection groove. A baffle groove is located on one side of the filter box 11, between the snap-fit ​​groove and the collision groove. A baffle 19 is slidably connected inside the baffle groove. A sealing strip is symmetrically fixed to the top of the baffle 19 about the snap-fit ​​groove, and the sealing strip is sealed to the baffle groove. A fastening strip is symmetrically rotatably connected to one side of the filter box 11, and the fastening strip abuts against the movement path of the dust collection box 18 and the baffle 19, thereby achieving the effect of fixing the dust collection box 18 and the baffle 19. A positioning block is fixedly connected to one side of the filter box 11, and a fastening bolt is threadedly connected to the surface of the positioning block, and the fastening bolt is threadedly connected to the fastening strip.

[0028] As a technical optimization of this utility model, the drop-out port 17, the collection trough, and the dust collection box 18 realize the centralized collection of impurities, which is convenient for cleaning; the baffle 19 and the sealing strip effectively prevent impurities from escaping and ensure the filtration effect; the cooperation of the fastening strip and the fastening bolt ensures the stability of the dust collection box 18 and the baffle 19. The overall structural design is reasonable, which further improves the practicality and reliability of the filtration mechanism.

[0029] refer to Figure 2 The waste heat exchange chamber 3 is provided with a conical guide block 20, and the two ends of the surface of the conical guide block 20 are fixedly connected to the waste heat exchange chamber 3 through a support frame.

[0030] As a technical optimization of this utility model, by setting a conical guide block 20, the flow path of the waste heat medium in the waste heat exchange cavity 3 is optimized, avoiding local accumulation of the medium in the cavity, ensuring that the heat can be more fully transferred to the heat exchange column 4, thereby improving the waste heat recovery efficiency of the entire device. The setting of the support frame ensures the stability of the installation of the conical guide block 20, so that it can reliably play a guiding role for a long time.

[0031] refer to Figure 1A temperature sensor (not shown) is installed on the inner wall of the waste heat exchange chamber 3. A controller 21 is fixedly connected to the surface of the base 1. The surface of the controller 21 is equipped with a human-machine interface. The temperature sensor is electrically connected to the controller 21, which can transmit the monitored temperature data of the waste heat medium in the waste heat exchange chamber 3 to the controller 21 in real time. The controller 21 has preset parameter thresholds. When the monitored data exceeds the threshold (such as the temperature being too high or too low), the human-machine interface will issue a prompt. The operator can operate the controller 21 to output control commands through the interface. At the same time, the controller 21 establishes a signal connection with the external multi-level adjustable turbine. It can synchronously adjust the turbine's operating parameters according to the temperature change of the waste heat medium. For example, when the temperature rises and the waste heat energy increases, the controller 21 controls the turbine to increase the air intake and adjust the blade angle to improve the energy recovery efficiency. When the temperature drops, the controller adjusts in the opposite way to avoid the turbine from being unstable due to insufficient energy input.

[0032] As a technical optimization of this utility model, the temperature sensor and controller 21 work together to realize real-time monitoring and intelligent control of the temperature inside the waste heat exchange chamber 3. The staff can understand the operating status of the device in a timely manner, and adjust the operating parameters according to temperature changes to ensure that the device is always in the best operating state, thereby improving the automation level and operational reliability of the device. The human-machine interface facilitates the operation and monitoring of the staff.

[0033] The working principle and usage process of this utility model are as follows: When using this waste heat recovery device from a thermal power plant, the waste heat medium generated by the thermal power plant is first introduced into the filter box 11, which is connected to the inlet of the waste heat recovery tank 2. The waste heat medium first contacts the filter screen 13 at the center of the snap-fit ​​plate 12. The filter screen 13 filters the impurities in the waste heat medium. When the filtered impurities reciprocate against the elastic block 14 in the collision groove on one side of the snap-fit ​​plate 12 by the electric impactor 15, they fall from the drop outlet 17 on the snap-fit ​​plate 12 into the dust collection box 18 in the bottom collection groove of the filter box 11 due to the slight vibration of the snap-fit ​​plate 12. At the same time, the buffer frame 16 buffers the vibrating snap-fit ​​plate 12. The baffle 19 in the baffle groove and the sealing strip on the top of the baffle 19 prevent... Impurities escape, and the fixing strip on the top of the filter box 11 fixes the snap-fit ​​plate 12. The fastening strip on one side of the filter box 11 and the fastening bolt on the positioning block fix the dust collection box 18 and the baffle 19. The filtered waste heat medium enters the waste heat exchange chamber 3 inside the waste heat recovery tank 2. The waste heat medium is guided to be evenly distributed by the conical guide block 20 fixed by the support frame inside the waste heat exchange chamber 3. The heat of the waste heat medium is transferred to the heat exchange chamber inside the waste heat recovery tank 2 through the heat exchange columns 4 in the heat exchange ports that are evenly arranged in a ring on the surface of the waste heat exchange chamber 3. The heat exchange strip 5 fixed at one end of the heat exchange column 4 and the heat distribution ring 6 evenly arranged on the surface of the heat exchange strip 5 increase the heat exchange area, so that the heat is evenly transferred to the heat transfer oil filled inside the heat exchange chamber. The heat transfer oil then transfers the heat. Spiral hot water pipes 7 and heating pipes 8 are alternately arranged inside the heat exchange chamber. External water and gas supply lines connect to the hot water pipes 7 and heating pipes 8, respectively, extending to the connectors 9 at the bottom of the waste heat recovery tank 2. Cold water and cold air enter from the inlet ends of the hot water pipes 7 and heating pipes 8, respectively, absorb heat, and flow out from the outlet ends for use. Insulation filler 10 inside the insulation chamber located outside the heat exchange chamber on the inner side of the waste heat recovery tank 2 reduces heat loss. The base 1 supports the entire device. Temperature sensors on the inner wall of the waste heat exchange chamber 3 monitor the temperature inside the chamber in real time and transmit the data to the controller 21 on the surface of the base 1. Operators can view the temperature data and adjust the device's operating parameters through the human-machine interface on the surface of the controller 21. After heat exchange is completed, the waste heat is recovered. The external multi-stage adjustable turbine connected to the exhaust flange of tank 2 further recovers and utilizes the residual energy of the exhaust gas. During this process, controller 21 continuously receives monitoring data from temperature sensors and dynamically and synchronously adjusts the operating status of the turbine and the device. For example, when the power plant unit load decreases, resulting in a reduction in the flow rate of the waste heat medium, controller 21 can first fine-tune the input medium flow rate of hot water pipe 7 and heating pipe 8 to reduce the heat exchange demand, and then control the turbine to reduce the operating power to ensure that the entire waste heat recovery system is accurately adapted to the changes in the power plant's operating conditions and always maintains stable and efficient operation. When cleaning or maintenance is required, loosen the fixing strip, remove the snap plate 12 to replace the filter screen 13, loosen the fastening strip and fastening bolt, and remove the dust collection box 18 to clean impurities.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for thermal power plants, comprising a base (1), characterized in that: A waste heat recovery tank (2) is fixedly connected to the top of the base (1). A waste heat exchange chamber (3) is provided inside the waste heat recovery tank (2). Several uniformly arranged annular heat exchange ports are provided on the surface of the waste heat exchange chamber (3). A heat exchange chamber is provided inside the waste heat recovery tank (2), and the heat exchange chamber is connected to the heat exchange ports. A heat exchange column (4) is installed inside the heat exchange port. A heat exchange strip (5) is fixedly connected to one end of the heat exchange column (4) on the same axis at the heat exchange chamber. Several uniformly arranged heat-spreading rings (6) are fixedly connected to the surface of the heat exchange strip (5), and the heat-spreading rings (6) are located inside the heat exchange chamber. The heat exchange chamber is filled with heat-conducting oil. Spiral hot water pipes (7) and heating pipes (8) are alternately arranged inside the heat exchange chamber. The input and output ends of the hot water pipes (7) and heating pipes (8) extend to the bottom of the waste heat recovery tank (2) and are connected by connectors (9). The input and output ends of the hot water pipes (7) and heating pipes (8) are located on both sides of the waste heat recovery tank (2). An insulation cavity is opened on the inner side of the waste heat recovery tank (2) and is located outside the heat exchange chamber. The insulation cavity is filled with insulation filler (10). A connecting flange is fixedly connected to the exhaust end of the waste heat recovery tank (2).

2. The waste heat recovery device for thermal power plants according to claim 1, characterized in that: The feed inlet of the waste heat recovery tank (2) is connected to a filter box (11). The top of the filter box (11) is provided with a snap-fit ​​groove, and a snap-fit ​​plate (12) is snapped onto the top of the snap-fit ​​groove. A filter screen (13) is fixedly connected to the center of the snap-fit ​​plate (12), and the filter screen (13) is used in conjunction with the waste heat exchange chamber (3).

3. The waste heat recovery device for thermal power plants according to claim 2, characterized in that: The snap-fit ​​plate (12) has symmetrical collision grooves on one side. An elastic block (14) is fixedly connected inside the collision groove. An electric impactor (15) capable of reciprocating motion is symmetrically fixedly connected to the groove wall of the snap-fit ​​plate. The output end of the electric impactor (15) is used in conjunction with the elastic block (14). A buffer frame (16) is fixedly connected to the inner wall of the snap-fit ​​plate. The buffer frame (16) is used in conjunction with the snap-fit ​​plate (12).

4. The waste heat recovery device for thermal power plants according to claim 3, characterized in that: The snap-fit ​​plate (12) is provided with a drop opening (17) on one side of the elastic block (14). The bottom of the filter box (11) is provided with a collection groove, and the collection groove is connected to the drop opening (17). A dust collection box (18) is slidably connected inside the collection groove. A baffle groove is provided on one side of the filter box (11), and the baffle groove is located between the snap-fit ​​groove and the collision groove. A baffle plate (19) is slidably connected inside the baffle groove. A sealing strip is symmetrically fixedly connected to the top of the baffle plate (19) about the snap-fit ​​groove, and the sealing strip is sealed to the baffle groove.

5. The waste heat recovery device for thermal power plants according to claim 1, characterized in that: The waste heat exchange cavity (3) is provided with a conical guide block (20), and the two ends of the surface of the conical guide block (20) are fixedly connected to the waste heat exchange cavity (3) through a support frame.

6. The waste heat recovery device for thermal power plants according to claim 1, characterized in that: A controller (21) is fixedly connected to the surface of the base (1), and a human-machine interface is provided on the surface of the controller (21).

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