A waste heat recovery and recycling device for thermal power generation

Abstract

This invention belongs to the field of waste heat recovery technology and discloses a waste heat recovery and reuse device for thermal power generation. The device includes a generator, with an exhaust pipe fixedly installed on the right side of the generator. An insulation box is fixedly installed at one end of the exhaust pipe. An installation frame is movably installed inside the insulation box, and a filter plate is fixedly installed inside the installation frame. A housing is fixedly installed on the back of the insulation box, and positioning holes are provided inside the installation frame. Compared with traditional equipment, this device, through the coordinated action of an exhaust fan and a auger inside the insulation box, utilizes the turbulence effect formed by forced airflow and spiral propulsion to significantly enhance the heat exchange efficiency between high-temperature flue gas and other waste heat media and circulating water, achieving a comprehensive energy efficiency improvement. The accompanying filter plate can efficiently intercept particulate impurities, ensuring the cleanliness of the heat exchange surface, extending equipment life, reducing pollutant emissions, and lowering environmental risks.

Description

Technical Field

[0001] This invention belongs to the field of waste heat recovery technology, specifically a waste heat recovery and reuse device for thermal power generation. Background Technology

[0002] Waste heat recovery and reuse equipment for thermal power generation is an integrated technology system. Its core function is to convert low-temperature waste heat generated during thermal power generation (such as condensation heat of steam exhaust at the cold end of the steam turbine and flue gas heat at the tail end of the boiler) into reusable high-grade heat energy or electrical energy through heat exchange, heat pump or phase change technology.

[0003] Current technologies for waste heat recovery and reuse equipment in thermal power plants present the following problems in the installation of filter plates in the insulation box: First, the alignment and positioning accuracy of components are extremely high. It is necessary to ensure a precise fit between the filter plate mounting frame and the positioning holes in the insulation box. Simultaneously, the second driven gear at the end of the exhaust fan's rotating shaft must mesh with the second drive gear without any clearance. Any slight deviation will lead to transmission failure or airflow turbulence, directly affecting heat exchange efficiency. Second, the assembly of the fixing mechanism is complex. The spring compression needs precise control, and the insertion depth error of the positioning block must be strictly controlled within a very small range. At the same time, the coaxiality of the motor output shaft and the gear at the end of the auger must be considered to avoid problems caused by… Vibration causes gear wear; in addition, the reliability of the sealing system faces challenges. The connection between the insulated box and the water tank and the interface of the circulating water pipe need to adopt a double-stage sealing structure, and the sealing performance must be verified through rigorous testing to prevent high-temperature media leakage from causing energy loss or safety hazards; finally, maintainability design needs to be planned in advance. Sufficient space needs to be reserved for the operation path of the lever of the quick disassembly mechanism, and the movement trajectory of the collection box must not interfere with the pipeline. These maintenance convenience requirements need to be verified through three-dimensional layout simulation during the initial installation stage to avoid increased costs from later modifications. At the same time, frequent disassembly and assembly operations may also cause wear to the positioning mechanism, affecting the long-term stable operation of the equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a waste heat recovery and reuse device for thermal power generation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery and reuse device for thermal power generation, comprising a generator, an exhaust pipe fixedly installed on the right side of the generator, an insulation box fixedly installed at one end of the exhaust pipe, an installation frame movably installed inside the insulation box, a filter plate fixedly installed inside the installation frame, a box body fixedly installed on the back of the insulation box, a positioning hole provided inside the installation frame, a positioning block movably installed inside the positioning hole, a pull rod fixedly installed at one end of the positioning block, and one end of the pull rod penetrating the interior of the box body, and a spring fixedly installed between the positioning block and the box body.

[0006] Preferably, a rotating shaft is movably installed inside the insulation box, with both ends of the rotating shaft penetrating the interior of the insulation box. An exhaust fan is fixedly installed on the outer surface of the rotating shaft. A second motor is fixedly installed on the back of the insulation box, and a second drive gear is fixedly installed at the output end of the second motor. One end of the second drive gear is movably installed inside the insulation box. A second driven gear is fixedly installed at one end of the rotating shaft, and the second driven gear meshes with the second drive gear.

[0007] Preferably, a connecting pipe is fixedly installed at the bottom of the insulated box, a water tank is fixedly installed at the bottom of the connecting pipe, and a water inlet pipe is fixedly installed at the top of the water tank. A auger is movably installed inside the insulated box, with one end of the auger penetrating the interior of the insulated box. A first motor is fixedly installed on the right side of the insulated box, and a first drive gear is fixedly installed at the output end of the first motor, with one end of the first drive gear movably inside the insulated box. A first driven gear is fixedly installed at one end of the auger, and the first driven gear meshes with the first drive gear. A limit plate is fixedly installed on the left side of the water tank, and a fixing rod is movably installed inside the limit plate. A rotating block is hinged to one end of the fixing rod, and a collection box is fixedly installed at the other end of the fixing rod. Universal wheels are hinged around the bottom of the collection box. A one-way valve is fixedly installed inside the water tank. A push rod is fixedly installed on the right side of the collection box, and a water outlet pipe is fixedly installed at the bottom of the water tank.

[0008] Preferably, a support column is fixedly installed at the bottom of the insulation box, and a reinforcing rib is fixedly installed between the two support columns.

[0009] Preferably, a handrail is fixedly installed on the top of the mounting frame, and the outer surface of the handrail has a U-shaped form.

[0010] Preferably, a fixing plate is fixedly installed at the angle between the support column and the reinforcing rib, and the fixing plate is triangular in shape.

[0011] Preferably, a support plate is fixedly installed on the right side of the insulation box, and the interior of the support plate has a U-shaped groove.

[0012] Preferably, the outer diameter of the positioning block is equal to the inner diameter of the positioning hole, and the interior of the positioning hole has a smooth surface design.

[0013] The beneficial effects of this invention are as follows: 1. Compared with traditional equipment, this invention utilizes the synergistic effect of an exhaust fan and a auger within the insulated box. This forced airflow and spiral propulsion create turbulence, significantly enhancing the heat exchange efficiency between high-temperature flue gas and other waste heat media and circulating water, thus improving overall energy efficiency. The accompanying filter plate efficiently intercepts particulate impurities, ensuring the cleanliness of the heat exchange surface, extending equipment lifespan, reducing pollutant emissions, and mitigating environmental risks. The heated circulating water can be directly used for heating or power generation, offering both economic and environmental benefits. The system employs a quick-release mechanism consisting of springs and positioning blocks; simply pulling the lever unlocks the installation frame, enabling tool-free and rapid filter plate replacement, reducing maintenance time. Furthermore, a gear transmission mechanism with precise meshing of the second drive gear and the second driven gear ensures accurate and controllable exhaust fan speed, effectively preventing heat exchange fluctuations caused by airflow turbulence and comprehensively guaranteeing long-term stable operation of the equipment.

[0014] 2. Compared with traditional equipment, this invention significantly improves waste heat utilization efficiency through mechanical transmission and airflow enhancement technology. The rotating shaft inside the insulation box is driven by a second motor, which in turn drives the exhaust fan at high speed via gear meshing. This generates forced airflow, directing the waste heat medium (such as high-temperature flue gas) to form a turbulent effect, enhancing the heat exchange efficiency between the medium and the box wall. Simultaneously, this airflow organization mechanism works in conjunction with the spiral propulsion of the auger, optimizing the uniformity of the waste heat medium's distribution and contact area through a combination of axial propulsion and radial turbulence, further improving heat transfer efficiency. Ultimately, heat is efficiently transferred through the box wall to the circulating water in the lower tank, completing the conversion and recovery of waste heat into thermal energy, significantly improving energy utilization efficiency and reducing energy consumption.

[0015] 3. Compared with traditional equipment, this invention features a auger driven by a first motor. Through precise meshing of a first drive gear and a first driven gear, the auger propels the waste heat medium in a spiral motion, creating a composite axial and radial flow field. This increases the contact area between the medium and the tank wall, significantly enhancing heat exchange efficiency. Waste heat is efficiently transferred through the tank wall to the circulating water in the water tank. The heated water is then output through the outlet pipe for heating or power generation, achieving a secondary conversion of waste heat into mechanical or thermal energy, thus improving energy utilization. The cooled medium can be returned to the main system for circulation or discharged, reducing pollution. A one-way valve inside the water tank prevents energy loss due to backflow, ensuring stable system operation. The left-side collection tank is quickly disassembled and assembled using a limiting plate and fixing rod, facilitating condensate or wastewater treatment and reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front three-dimensional appearance structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the insulated box of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the three-dimensional appearance structure of the back of the present invention; Figure 5 This is a schematic diagram of the side cross-sectional structure of the insulated box of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the filter plate of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is an exploded cross-sectional view of the mounting frame of the present invention; Figure 9 This is a schematic diagram of the collection box structure of the present invention.

[0017] In the diagram: 1. Generator; 2. Exhaust pipe; 3. Insulation box; 4. Connecting pipe; 5. Rotating shaft; 6. Handrail; 7. Mounting frame; 8. Support column; 9. Fixing plate; 10. Reinforcing rib; 11. Water tank; 12. Push rod; 13. Collection box; 14. Caster wheel; 15. Water outlet pipe; 16. Water inlet pipe; 17. Exhaust fan; 18. Auger; 19. Filter plate; 20. First motor; 21. Support plate; 22. First driven gear; 23. First drive gear; 24. Box body; 25. Second motor; 26. Second driven gear; 27. Second drive gear; 28. Positioning block; 29. ​​Spring; 30. Pull rod; 31. Rotating block; 32. Fixing rod; 33. Limiting plate; 34. Positioning hole; 35. One-way valve. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment of the invention provides a waste heat recovery and reuse device for thermal power generation, including a generator 1. A waste gas pipe 2 is fixedly installed on the right side of the generator 1. A heat preservation box 3 is fixedly installed at one end of the waste gas pipe 2. An installation frame 7 is movably installed inside the heat preservation box 3. A filter plate 19 is fixedly installed inside the installation frame 7. A box body 24 is fixedly installed on the back of the heat preservation box 3. A positioning hole 34 is opened inside the installation frame 7. A positioning block 28 is movably installed inside the positioning hole 34. A pull rod 30 is fixedly installed at one end of the positioning block 28, and one end of the pull rod 30 passes through the inside of the box body 24. A spring 29 is fixedly installed between the positioning block 28 and the box body 24.

[0020] like Figure 5 , Figure 6 , Figure 7 As shown, the waste heat medium flows out from the generator 1 and is conducted to the interior of the insulation box 3 through the exhaust pipe 2 fixed on its right side. In the insulation box 3, the waste heat medium first passes through the filter plate 19 fixed in the mounting frame 7 to effectively filter out impurities in the medium, ensuring the cleanliness and efficiency of the subsequent heat exchange process. The filtered waste heat medium exchanges heat with the circulating water in the water tank 11 below in the insulation box, transferring heat to the water and realizing the conversion of waste heat into thermal energy. When it is necessary to clean or replace the filter plate 19, it can be achieved by operating the positioning mechanism inside the box body 24 fixed on the back of the insulation box 3. Specifically, pull the pull rod 30, which drives the positioning block 28 to compress the spring 29 and disengage it from the positioning hole 34 of the mounting frame 7, thereby releasing the lock on the mounting frame 7. The mounting frame 7 can then be easily removed from the insulation box 3 for cleaning or replacement of the filter plate. After cleaning or replacement, the mounting frame 7 is put back into the insulation box 3, the pull rod 30 is released, the spring 29 returns to its original position, and the positioning block 28 is pushed back into the positioning hole 34, completing the fixation of the mounting frame 7 and ensuring that the equipment returns to normal operation.

[0021] After flowing out of generator 1, the waste heat medium is conducted to the interior of insulation box 3 via exhaust pipe 2, which is fixed to its right side. Inside insulation box 3, the waste heat medium first passes through filter plate 19 fixed within mounting frame 7, effectively filtering out particulate impurities and contaminants to ensure efficient and stable subsequent heat exchange. The filtered waste heat medium then undergoes thorough heat exchange with circulating water in water tank 11 below within insulation box 3. Heat is efficiently transferred to the water through the insulation box wall, realizing the conversion of waste heat into thermal energy. The heated water can then be output through outlet pipe 15 for heating or power generation. When it is necessary to clean or replace the filter plate 19, this can be achieved by operating the positioning mechanism inside the box 24 fixed on the back of the insulation box 3: pull the lever 30, causing the positioning block 28 to compress the spring 29 and disengage from the positioning hole 34 of the mounting frame 7, thereby releasing the lock on the mounting frame 7. At this time, the mounting frame 7 can be easily removed from the insulation box 3 for cleaning or replacement of the filter plate; after cleaning or replacement, put the mounting frame 7 back into the insulation box 3, release the lever 30, and the spring 29 will reset and push the positioning block 28 back into the positioning hole 34, completing the fixation of the mounting frame 7. Compared with traditional equipment, this equipment, through the coordinated action of the exhaust fan and the auger inside the insulation box, utilizes the turbulence effect formed by forced airflow and spiral propulsion to significantly enhance the cleaning performance. The system improves the heat exchange efficiency between high-temperature flue gas and other waste heat media and circulating water, thereby enhancing overall energy efficiency. The accompanying filter plates efficiently intercept particulate impurities, ensuring the cleanliness of the heat exchange surface, extending equipment lifespan, reducing pollutant emissions, and mitigating environmental risks. The heated circulating water can be directly used for heating or power generation, offering both economic and environmental benefits. The system employs a quick-release mechanism consisting of springs and positioning blocks, allowing for tool-free replacement of the filter plates by simply pulling a lever, thus reducing maintenance time. Furthermore, a gear transmission mechanism with precise meshing of the second drive gear and the second driven gear ensures accurate and controllable exhaust fan speed, effectively preventing heat exchange fluctuations caused by airflow turbulence and comprehensively guaranteeing long-term stable operation of the equipment.

[0022] The heat preservation box 3 has a rotating shaft 5 movably installed inside, with both ends of the rotating shaft 5 penetrating the interior of the heat preservation box 3. An exhaust fan 17 is fixedly installed on the outer surface of the rotating shaft 5. A second motor 25 is fixedly installed on the back of the heat preservation box 3, and a second drive gear 27 is fixedly installed at the output end of the second motor 25. One end of the second drive gear 27 is movably installed inside the heat preservation box 3. A second driven gear 26 is fixedly installed at one end of the rotating shaft 5, and the second driven gear 26 meshes with the second drive gear 27.

[0023] A rotating shaft 5 is installed through the inside of the insulation box 3, with both ends extending to the outside of the box. An exhaust fan 17 is fixedly mounted on the surface of the shaft. When the equipment is running, the second motor 25 fixed to the back of the insulation box 3 starts, and its output drives the second drive gear 27 to rotate. This gear meshes with the second driven gear 26 fixed to the end of the rotating shaft 5, thereby driving the rotating shaft 5 and the exhaust fan 17 to rotate synchronously. The rotation of the exhaust fan 17 generates forced airflow, which drives the waste heat medium, such as high-temperature flue gas, in the insulation box 3 to form a directional flow, enhancing the heat exchange efficiency between the medium and the box wall. This airflow organization mechanism works in conjunction with the spiral propulsion of the auger 18 in the insulation box 3 to optimize the distribution and contact area of ​​the waste heat medium. Finally, the heat is efficiently transferred to the circulating water in the water tank 11 below through the box wall, realizing the conversion and recovery of waste heat into thermal energy.

[0024] The rotating shaft 5, which runs through the heat-insulating box 3, extends to both ends of the box body, and an exhaust fan 17 is fixedly mounted on its surface. When the equipment is running, the second motor 25 on the back of the heat-insulating box 3 drives the second drive gear 27 to rotate, which in turn drives the second driven gear 26 at the end of the rotating shaft 5 through gear meshing, so that the rotating shaft 5 and the exhaust fan 17 rotate synchronously at high speed. The forced airflow generated by the exhaust fan 17 drives the waste heat medium, such as high-temperature flue gas, to flow directionally within the heat-insulating box 3, forming a turbulence effect to enhance the heat exchange efficiency between the medium and the box wall. This airflow organization mechanism, together with the spiral propulsion of the auger 18 inside the heat-insulating box 3, forms a synergistic effect. Through the combined motion of axial propulsion and radial turbulence, the uniformity of the waste heat medium distribution and the contact area are optimized. Finally, the heat is efficiently transferred to the circulating water in the water tank 11 below through the box wall, completing the conversion and recovery of waste heat into thermal energy, significantly improving energy utilization efficiency. Compared with traditional equipment, this equipment significantly improves waste heat utilization efficiency through mechanical transmission and airflow enhancement technology. The rotating shaft 5 inside the insulation box 3 is driven by the second motor 25, which drives the exhaust fan 17 to rotate at high speed through gear meshing. This generates forced airflow, causing the waste heat medium, such as high-temperature flue gas, to flow in a directional manner, creating a turbulent effect and enhancing the heat exchange efficiency between the medium and the box wall. Simultaneously, this airflow organization mechanism works in conjunction with the spiral propulsion of the auger 18, optimizing the uniformity of the waste heat medium's distribution and contact area through a combination of axial propulsion and radial turbulence, further improving heat transfer efficiency. Ultimately, the heat is efficiently transferred through the box wall to the circulating water in the water tank 11 below, completing the conversion and recovery of waste heat into thermal energy, significantly improving energy utilization efficiency and reducing energy consumption.

[0025] The insulated box 3 has a connecting pipe 4 fixedly installed at its bottom, a water tank 11 fixedly installed at its bottom, and an inlet pipe 16 fixedly installed at its top. A auger 18 is movably installed inside the insulated box 3, with one end of the auger 18 penetrating the interior of the insulated box 3. A first motor 20 is fixedly installed on the right side of the insulated box 3, and a first drive gear 23 is fixedly installed at the output end of the first motor 20, with one end of the first drive gear 23 movable inside the insulated box 3. A first driven gear is fixedly installed at one end of the auger 18. The first driven gear 22 meshes with the first driving gear 23. A limiting plate 33 is fixedly installed on the left side of the water tank 11. A fixing rod 32 is movably installed inside the limiting plate 33. A rotating block 31 is hinged to one end of the fixing rod 32. A collection box 13 is fixedly installed at the other end of the fixing rod 32. Universal wheels 14 are hinged around the bottom of the collection box 13. A one-way valve 35 is fixedly installed inside the water tank 11. A push rod 12 is fixedly installed on the right side of the collection box 13. A water outlet pipe 15 is fixedly installed at the bottom of the water tank 11.

[0026] like Figure 8 and Figure 9 As shown, waste heat enters the system through the top of the insulation box 3. The built-in auger 18 rotates under the drive of the first motor 20. The first drive gear 23 at its output end meshes with the first driven gear 22 at the end of the auger, causing the auger to spirally propel the waste heat medium, such as flue gas or steam, along the inside of the insulation box. During the flow, the waste heat exchanges heat with the water in the water tank 11 below through the insulation box wall. The heated water is output through the water outlet pipe 15 for reuse. The cooled waste heat medium may return to the main system or outside through the connecting pipe 4. The one-way valve 35 installed in the water tank controls the direction of water flow to prevent backflow. The collection box 13 on the left side of the water tank is connected to the fixing rod 32 through the limiting plate 33, which can receive condensate or wastewater from the water tank. The universal wheels 14 at the bottom of the collection box, together with the push rod 12, facilitate movement and handling. Then, the water is poured into the inside of the water tank 11 through the water inlet pipe 16, thereby completing the heat recovery.

[0027] After the waste heat medium enters from the top of the insulation box 3, the auger 18 rotates under the drive of the first motor 20. The first drive gear 23 at its output end meshes precisely with the first driven gear 22 at the end of the auger, driving the auger to force the waste heat medium, such as flue gas or steam, to flow directionally along the inner wall of the insulation box in a spiral propulsion manner, forming a composite motion of axial flow field and radial turbulence, which significantly increases the contact area between the medium and the box wall. The waste heat is efficiently transferred through the box wall to the circulating water in the water tank 11 below. The heated water is output through the outlet pipe 15 for heating or power generation, realizing the secondary conversion of waste heat into mechanical energy or thermal energy. The cooled medium can return to the main system through the connecting pipe 4 to form a circulation or be discharged; the one-way valve 35 installed in the water tank ensures the one-way flow of water and prevents energy loss caused by backflow; the left collection box 13 can be quickly assembled and disassembled through the limiting plate 33 and the fixing rod 32. Compared with traditional equipment, the auger 18 of this equipment is driven by the first motor 20, and through the precise meshing of the first drive gear 23 and the first driven gear 22, it realizes the spiral propulsion of the waste heat medium to flow in a directional manner, forming an axial and radial composite flow field, which increases the contact area between the medium and the tank wall. The heat exchange efficiency is greatly enhanced; waste heat is efficiently conducted to the circulating water in the water tank 11 through the tank wall, and the heated water is output through the outlet pipe 15 for heating or power generation, realizing the secondary conversion of waste heat into mechanical energy or thermal energy, and improving energy utilization; the cooled medium can be returned to the main system to form a circulation or be discharged externally, reducing pollution emissions; the one-way valve 35 in the water tank prevents energy loss caused by backflow and ensures stable system operation; the left collection box 13 can be quickly disassembled and assembled through the limit plate 33 and the fixing rod 32, which facilitates the treatment of condensate or wastewater and reduces maintenance costs.

[0028] Among them, the bottom of the heat preservation box 3 is fixedly installed with a support column 8, and a reinforcing rib 10 is fixedly installed between the two support columns 8.

[0029] Because a reinforcing rib 10 is fixedly installed between the two support columns 8, the cooperation between the support columns 8 and the reinforcing rib 10 facilitates stable support for the insulation box 3, ensuring the stability of the insulation box 3 during use.

[0030] The top of the mounting frame 7 is fixedly equipped with a handrail 6, and the outer surface of the handrail 6 is U-shaped.

[0031] Because the outer surface of the handrail 6 is U-shaped in the mounting frame 7, and the U-shaped mounting frame 7 is ergonomic, it is easy for workers to hold the mounting frame 7 and insert the handrail 6 into the interior of the insulation box 3, thus ensuring the installation efficiency of the mounting frame 7.

[0032] A fixing plate 9 is fixedly installed at the angle between the support column 8 and the reinforcing rib 10, and the fixing plate 9 is triangular in shape.

[0033] Since the fixing plate 9 is triangular in shape at the angle between the support column 8 and the reinforcing rib 10, and the triangle has the characteristic of stability, it is convenient to provide stable support for the support column 8 and the reinforcing rib 10, thereby improving the efficiency of the support column 8 during use.

[0034] Among them, a support plate 21 is fixedly installed on the right side of the heat preservation box 3, and the interior of the support plate 21 is in the form of a U-shaped groove.

[0035] Since the support plate 21 has a U-shaped groove on the left side of the insulation box 3, and the support plate 21 is attached to the outer surface of the first motor 20, it is convenient to provide stable support for the first motor 20 and ensure the stability of the first motor 20 during use.

[0036] The outer diameter of the positioning block 28 is equal to the inner diameter of the positioning hole 34, and the interior of the positioning hole 34 has a smooth surface design.

[0037] Since the outer diameter of the positioning block 28 is equal to the inner diameter of the positioning hole 34, and the interior of the positioning hole 34 has a smooth surface design, it is convenient for the positioning block 28 to limit and fix the mounting frame 7 inside the positioning hole 34, thus ensuring the stability of the filter plate 19 and the mounting frame 7 during use.

[0038] Working principle and usage process: Waste heat medium flows out from generator 1 and is conducted to the inside of insulation box 3 through component exhaust pipe 2 fixed on its right side; in insulation box 3, waste heat medium first passes through filter plate 19 fixed in mounting frame 7 to effectively filter out impurities in the medium, ensuring clean and efficient heat exchange process in the subsequent process. The filtered waste heat medium exchanges heat with the circulating water in the water tank 11 below in the insulation box, transferring heat to the water and realizing the conversion of waste heat into thermal energy. When it is necessary to clean or replace the filter plate 19, it can be achieved by operating the positioning mechanism inside the box body 24 fixed on the back of the insulation box 3. Specifically, pull the pull rod 30, which drives the positioning block 28 to compress the spring 29 and disengage it from the positioning hole 34 of the mounting frame 7, thereby releasing the lock on the mounting frame 7. The mounting frame 7 can then be easily removed from the insulation box 3 for cleaning or replacement of the filter plate. After cleaning or replacement, the mounting frame 7 is put back into the insulation box 3, the pull rod 30 is released, the spring 29 returns to its original position, and the positioning block 28 is pushed back into the positioning hole 34, completing the fixation of the mounting frame 7 and ensuring that the equipment returns to normal operation.

[0039] A rotating shaft 5 is installed through the inside of the insulation box 3, with both ends extending to the outside of the box. An exhaust fan 17 is fixedly mounted on the surface of the shaft. When the equipment is running, the second motor 25 fixed to the back of the insulation box 3 starts, and its output drives the second drive gear 27 to rotate. This gear meshes with the second driven gear 26 fixed to the end of the rotating shaft 5, thereby driving the rotating shaft 5 and the exhaust fan 17 to rotate synchronously. The rotation of the exhaust fan 17 generates forced airflow, which drives the waste heat medium, such as high-temperature flue gas, in the insulation box 3 to form a directional flow, enhancing the heat exchange efficiency between the medium and the box wall. This airflow organization mechanism works in conjunction with the spiral propulsion of the auger 18 in the insulation box 3 to optimize the distribution and contact area of ​​the waste heat medium. Finally, the heat is efficiently transferred to the circulating water in the water tank 11 below through the box wall, realizing the conversion and recovery of waste heat into thermal energy.

[0040] Waste heat enters the system through the top of the insulation box 3. The built-in auger 18 rotates under the drive of the first motor 20. The first drive gear 23 at its output end meshes with the first driven gear 22 at the end of the auger, causing the auger to spirally propel the waste heat medium, such as flue gas or steam, along the inside of the insulation box. During the flow, the waste heat exchanges heat with the water in the water tank 11 below through the insulation box wall. The heated water is output through the outlet pipe 15 for reuse. The cooled waste heat medium may return to the main system or outside through the connecting pipe 4. The one-way valve 35 installed in the water tank controls the direction of water flow to prevent backflow. The collection box 13 on the left side of the water tank is connected to the fixed rod 32 through the limiting plate 33 and the rotating block 31. It can receive condensate or wastewater from the water tank. The universal wheel 14 at the bottom of the collection box, together with the push rod 12, facilitates movement and handling. Then, the water is poured into the inside of the water tank 11 through the water inlet pipe 16, thereby completing the heat recovery.

[0041] 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.

[0042] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermal power plant waste heat recovery and reuse apparatus comprising a power generator (1), characterized by: The right side of the generator (1) is fixedly installed with an exhaust pipe (2), one end of the exhaust pipe (2) is fixedly installed with a heat preservation box (3), the inside of the heat preservation box (3) is movably installed with a mounting frame (7), the inside of the mounting frame (7) is fixedly installed with a filter plate (19), the back of the heat preservation box (3) is fixedly installed with a box body (24), the inside of the mounting frame (7) is provided with a positioning hole (34), the inside of the positioning hole (34) is movably installed with a positioning block (28), one end of the positioning block (28) is fixedly installed with a pull rod (30), one end of the pull rod (30) penetrates the inside of the box body (24), and the positioning block (28) and the box body (24) are fixedly installed with a spring (29).

2. A thermal power plant waste heat recovery and recycling apparatus according to claim 1, characterized in that: The inside of the heat preservation box (3) is movably installed with a rotating shaft (5), both ends of the rotating shaft (5) penetrate the inside of the heat preservation box (3), the outer surface of the rotating shaft (5) is fixedly installed with an exhaust fan (17), the back of the heat preservation box (3) is fixedly installed with a second motor (25), the output end of the second motor (25) is fixedly installed with a second drive gear (27), one end of the second drive gear (27) is movably installed in the inside of the heat preservation box (3), one end of the rotating shaft (5) is fixedly installed with a second driven gear (26), and the second driven gear (26) is engaged with the second drive gear (27).

3. A thermal power plant waste heat recovery and recycling device according to claim 1, characterized in that: The bottom of the heat preservation box (3) is fixedly installed with a connecting pipe (4), the bottom of the connecting pipe (4) is fixedly installed with a water tank (11), the top of the water tank (11) is fixedly installed with a water inlet pipe (16), the inside of the heat preservation box (3) is movably installed with a dragon (18), one end of the dragon (18) penetrates the inside of the heat preservation box (3), the right side of the heat preservation box (3) is fixedly installed with a first motor (20), the output end of the first motor (20) is fixedly installed with a first drive gear (23), one end of the first drive gear (23) is movably installed in the inside of the heat preservation box (3), one end of the dragon (18) is fixedly installed with a first driven gear (22), the first driven gear (22) is engaged with the first drive gear (23), the left side of the water tank (11) is fixedly installed with a limiting plate (33), the inside of the limiting plate (33) is movably installed with a fixing rod (32), one end of the fixing rod (32) is hingedly connected with a rotating block (31), the other end of the fixing rod (32) is fixedly installed with a collecting box (13), the bottom of the collecting box (13) is hingedly connected with a universal wheel (14), the inside of the water tank (11) is fixedly installed with a check valve (35), the right side of the collecting box (13) is fixedly installed with a push rod (12), and the bottom of the water tank (11) is fixedly installed with a water outlet pipe (15).

4. The waste heat recovery and reuse apparatus for thermal power plants according to claim 1, characterized in that: The bottom of the heat preservation box (3) is fixedly installed with a supporting column (8), and the two supporting columns (8) are fixedly installed with a reinforcing rib (10).

5. The apparatus for waste heat recovery and reuse in thermal power generation according to claim 1, characterized in that: The top of the mounting frame (7) is fixedly installed with a handrail (6), and the outer surface of the handrail (6) is in the shape of U.

6. A thermal power plant waste heat recovery and recycling apparatus according to claim 4, characterized in that: The support column (8) and the reinforcing rib (10) are fixedly installed with a fixed plate (9) at the angle, and the fixed plate (9) is triangular.

7. The thermal power plant waste heat recovery and recycling apparatus according to claim 1, characterized in that: The right side of the heat preservation box (3) is fixedly installed with a support plate (21), and the inside of the support plate (21) is in the form of a U-shaped groove.

8. The thermal power plant waste heat recovery and recycling apparatus according to claim 1, characterized in that: The outer diameter value of the positioning block (28) is equal to the inner diameter value of the positioning hole (34), and the inside of the positioning hole (34) has a light surface design.

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