A waste heat recovery device for thermal power generation

Abstract

This invention relates to the field of waste heat recovery technology in thermal power plants, and discloses a waste heat recovery device for thermal power generation, including a recovery box. Multiple heat exchange boxes are fixedly connected between the inner walls of both sides of the recovery box. Connecting pipes are inserted between adjacent heat exchange boxes. A water inlet pipe is inserted into one side of the rightmost heat exchange box of the recovery box, with the other end of the water inlet pipe exiting the recovery box. A water outlet pipe is inserted into one side of the leftmost heat exchange box of the recovery box, with the other end of the water outlet pipe exiting the recovery box. A mounting bracket is slidably connected between the inner walls of both sides of the recovery box. This invention utilizes a motor to rotate a threaded rod, thereby moving a slider, which in turn moves the mounting bracket, a cleaning plate, and a first cleaning brush. This causes the first cleaning brush to slide on the outer wall of the heat exchange box, thus brushing off dust and impurities adhering to the outer wall of the heat exchange box, thereby improving the heat exchange efficiency of the heat exchange box.

Description

Technical Field

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

[0002] A thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials (such as coal) as fuel to produce electricity. Its basic production process is as follows: when fuel is burned, it heats water to generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives the turbine to rotate, converting the heat energy into mechanical energy. Then, the turbine drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] Currently, in existing methods of recovering and utilizing waste heat from thermal power generation, the waste heat contains a large amount of dust. During the recovery process, dust particles adhere to the heat exchange tubes or filter screens, which are inconvenient to clean. Over time, this can lead to blockage of the heat exchange tubes or filter screens, thereby affecting the waste heat recovery efficiency of thermal power generation. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a waste heat recovery device for thermal power generation. The main purpose is to solve the problem that existing waste heat recovery methods often involve a large amount of dust mixed in with the heat. During recovery, dust particles adhere to heat exchange tubes or filter screens, making cleaning difficult and, over time, causing blockages that negatively impact the waste heat recovery efficiency.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A waste heat recovery device for thermal power generation includes a recovery box. Multiple heat exchange boxes are fixedly connected between the inner walls of both sides of the recovery box. Connecting pipes are inserted between adjacent heat exchange boxes. A water inlet pipe is inserted into one side of the rightmost heat exchange box, with the other end of the inlet pipe exiting the recovery box. A water outlet pipe is inserted into one side of the leftmost heat exchange box, with the other end of the outlet pipe exiting the recovery box. A mounting bracket is slidably connected between the inner walls of both sides of the recovery box. Multiple cleaning plates are fixedly connected to the bottom of the mounting bracket. A first cleaning brush is adhered to the cleaning plate and can contact the outer wall of the heat exchange box. A motor is fixedly mounted on one outer wall of the recovery box. A threaded rod is keyed to the output end of the motor, and a slider is threaded onto the outer wall of the threaded rod. The slider is slidably connected to one side of the recycling bin via a groove. One end of the slider is fixedly connected to one end of the mounting bracket. One end of the threaded rod is keyed to a drive gear. A fixed seat is fixedly connected between the inner walls of the two sides of the recycling bin. The top of the fixed seat has a mounting hole. A fixed ring is fixedly connected to the inner circumference of the mounting hole. Multiple second cleaning brushes are fixedly connected to the inner circumference of the fixed ring. A fixed disk is fixedly connected to one end of the multiple second cleaning brushes. A rotating seat is rotatably connected to the top of the fixed disk. The outer circumference of the rotating seat has a toothed groove. The drive gear passes through one side of the fixed seat and meshes with the toothed groove. A through hole is provided between the top and bottom of the rotating seat. A filter element is provided in the through hole. Filter screens are snapped into the top and bottom of the through hole. The second cleaning brushes contact the filter screens of the rotating seat.

[0009] Furthermore, an air inlet pipe is inserted into one side of the recycling box, and an exhaust pipe is inserted into the top of the recycling box.

[0010] Based on the aforementioned scheme, a solenoid valve is fixedly connected to the other end of the intake pipe.

[0011] As a further embodiment of the present invention, an installation box is fixedly connected to one side of the outer wall of the recycling box, and the installation box covers the outside of the threaded rod.

[0012] Furthermore, a collection hopper with a V-shaped structure is snapped into the bottom of the fixing base.

[0013] Based on the aforementioned scheme, activated carbon plates and moisture-absorbing plates are snapped together between the inner walls of the multiple sides of the recycling box, with the moisture-absorbing plates located above the activated carbon plates.

[0014] As a further embodiment of the present invention, a hopper is fixedly connected to the bottom of the recycling box, and a baffle is slidably inserted into one side of the hopper.

[0015] Furthermore, a collection box is provided at the bottom of the hopper.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a waste heat recovery device for thermal power generation, which has the following beneficial effects:

[0018] 1. Driven by the motor, the threaded rod rotates, which in turn moves the slider, which in turn moves the mounting bracket, cleaning plate, and first cleaning brush. This causes the first cleaning brush to slide on the outer wall of the heat exchange box, thus brushing off the dust and impurities adhering to the outer wall of the heat exchange box to improve the heat exchange efficiency of the heat exchange box.

[0019] 2. The motor drives the drive gear to rotate, and the drive gear meshes with the tooth groove to drive the rotating seat to rotate. This causes the filter screen at the bottom of the rotating seat to move with the second cleaning brush, thereby brushing off the dust and impurities adhering to the filter screen to avoid affecting the filtration efficiency of the filter screen.

[0020] 3. Heat is exchanged between the heat in the flue gas and the water in the heat exchange box, thereby heating the water in the heat exchange box. The heated hot water is discharged from the outlet pipe, thus realizing the recovery of waste heat from thermal power generation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a waste heat recovery device for thermal power generation proposed in this invention.

[0022] Figure 2 This is a bottom view schematic diagram of a waste heat recovery device for thermal power generation proposed in this invention.

[0023] Figure 3 This is a rear view schematic diagram of a waste heat recovery device for thermal power generation proposed in this invention.

[0024] Figure 4 This is a schematic diagram of the internal structure of a waste heat recovery device for thermal power generation proposed in this invention.

[0025] Figure 5 This is a cross-sectional structural schematic diagram of a waste heat recovery device for thermal power generation proposed in this invention.

[0026] Figure 6 This is a partial three-dimensional structural schematic diagram of a waste heat recovery device for thermal power generation proposed in this invention.

[0027] Figure 7 This is a partial cross-sectional view of a waste heat recovery device for thermal power generation proposed in this invention.

[0028] Figure 8 This is an enlarged structural diagram of point A of a waste heat recovery device for thermal power generation proposed in this invention.

[0029] In the diagram: 1. Recycling box; 2. Air inlet pipe; 3. Exhaust pipe; 4. Heat exchange box; 5. Connecting pipe; 6. Water inlet pipe; 7. Water outlet pipe; 8. Solenoid valve; 9. Mounting bracket; 10. Cleaning plate; 11. First cleaning brush; 12. Mounting box; 13. Threaded rod; 14. Slider; 15. Motor; 16. Fixed seat; 17. Collection hopper; 18. Fixed ring; 19. Rotating seat; 20. Filter screen; 21. Filter element; 22. Second cleaning brush; 23. Fixed disc; 24. Gear; 25. Drive gear; 26. Activated carbon plate; 27. Moisture-absorbing plate; 28. Feed hopper; 29. ​​Baffle; 30. Collection box. Detailed Implementation

[0030] 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.

[0031] Reference Figures 1-8 A waste heat recovery device for thermal power generation includes a recovery box 1. Multiple heat exchange boxes 4 are fixed between the inner walls of both sides of the recovery box 1 by bolts. Connecting pipes 5 are inserted between adjacent heat exchange boxes 4. A water inlet pipe 6 is inserted into one side of the rightmost heat exchange box 4 of the recovery box 1. The other end of the water inlet pipe 6 extends out of the recovery box 1. A water outlet pipe 7 is inserted into one side of the leftmost heat exchange box 4 of the recovery box 1. The other end of the water outlet pipe 7 extends out of the recovery box 1. Water is input into the heat exchange box 4 from the water inlet pipe 6 and then transported to multiple heat exchange boxes 4 for heating through the connecting pipes 5. The heated hot water is discharged from the water outlet pipe 7.

[0032] A mounting bracket 9 is slidably connected between the inner walls of both sides of the recycling box 1. Multiple cleaning plates 10 are fixed to the bottom of the mounting bracket 9 by bolts. A first cleaning brush 11 is attached to the cleaning plate 10. The first cleaning brush 11 can contact the outer wall of the heat exchange box 4. A motor 15 is fixed to one side of the outer wall of the recycling box 1. A threaded rod 13 is keyed to the output end of the motor 15. A slider 14 is threaded on the outer wall of the threaded rod 13. The slider 14 is slidably connected to one side of the recycling box 1 by opening a groove. One end of the slider 14 is fixedly connected to one end of the mounting bracket 9. Under the drive of the motor 15, the threaded rod 13 rotates, thereby driving the slider 14 to move, which in turn drives the mounting bracket 9, the cleaning plate 10 and the first cleaning brush 11 to move, so that the first cleaning brush 11 slides on the outer wall of the heat exchange box 4, thus brushing off the dust and impurities adhering to the outer wall of the heat exchange box 4.

[0033] One end of the threaded rod 13 is keyed to a drive gear 25. A fixing seat 16 is bolted between the inner walls of both sides of the recycling box 1. The top of the fixing seat 16 has a mounting hole, and a fixing ring 18 is welded to the inner circumference of the mounting hole. Multiple second cleaning brushes 22 are bolted to the inner circumference of the fixing ring 18. A fixing disc 23 is welded to one end of each of the multiple second cleaning brushes 22. A rotating seat 19 is rotatably connected to the top of the fixing disc 23. A toothed groove 24 is provided on the outer circumference of the rotating seat 19. The drive gear 25 passes through one side of the fixing seat 16 and meshes with the toothed groove 24. A through hole is provided between the top and bottom of the rotating seat 19, and a filter element 21 is provided in the through hole. A filter screen 20 is snapped into the top and bottom of the through hole. The filter screen 20 is used to filter dust and particulate impurities. The second cleaning brush 22 contacts the filter screen 20 of the rotating seat 19. The motor 15 drives the drive gear 25 to rotate. Under the action of the drive gear 25 meshing with the tooth groove 24, the rotating seat 19 is driven to rotate, so that the filter screen 20 at the bottom of the rotating seat 19 is brushed by the second cleaning brush 22, thereby brushing off the dust and impurities adhering to the filter screen 20.

[0034] An air inlet pipe 2 is inserted into one side of the recycling box 1, and an exhaust pipe 3 is inserted into the top of the recycling box 1. Smoke enters the recycling box 1 through the air inlet pipe 2, is processed, and then exits through the exhaust pipe 3. A solenoid valve 8 is fixed to the other end of the air inlet pipe 2 with bolts. A mounting box 12 is fixed to the outer wall of one side of the recycling box 1 with bolts. The mounting box 12 covers the outside of the threaded rod 13. A collection hopper 17 is snapped into the bottom of the fixing seat 16. Dust and impurities adhering to the filter screen 20 are brushed off and collected in the collection hopper 17. The collection hopper 17 has a V-shaped structure. The recycling box 1 has multiple... An activated carbon plate 26 and a moisture-absorbing plate 27 are snapped together between the inner side walls. The activated carbon plate 26 adsorbs harmful substances in the flue gas, and the moisture-absorbing plate 27 is located above the activated carbon plate 26. The moisture-absorbing plate 27 adsorbs the moisture generated when the flue gas exchanges heat with the heat exchange box 4. The bottom of the recovery box 1 is fixed with a feeding hopper 28 by bolts. A baffle 29 is slidably inserted into one side of the feeding hopper 28. A collection box 30 is provided at the bottom of the feeding hopper 28. Dust and impurities fall on the baffle 29. The baffle 29 is then pulled outward so that the dust and impurities on it fall into the collection box 30 for collection.

[0035] The working principle of this embodiment is as follows: In use, firstly, water is introduced into the heat exchange box 4 through the water inlet pipe 6, and then transported to multiple heat exchange boxes 4 through the connecting pipe 5. Then, the solenoid valve 8 is opened, and the flue gas enters the recovery box 1 through the air inlet pipe 2. Next, the flue gas rises upward. When the flue gas rises to the position of the heat exchange box 4, the heat in the flue gas exchanges heat with the water in the heat exchange box 4, thereby heating the water in the heat exchange box 4. The heated hot water is discharged from the water outlet pipe 7. Then, the flue gas continues to rise and passes through the filter screen 20 to filter the dust and particulate impurities. Then, the activated carbon plate 26 adsorbs the harmful substances in the flue gas. Then, the moisture absorption plate 27 adsorbs the moisture generated when the flue gas exchanges heat with the heat exchange box 4. Finally, it is discharged from the exhaust pipe 3.

[0036] When cleaning of the heat exchange box 4 is required, the motor 15 is started. Driven by the motor 15, the threaded rod 13 rotates, thereby moving the slider 14, which in turn moves the mounting bracket 9, the cleaning plate 10, and the first cleaning brush 11. This causes the first cleaning brush 11 to slide on the outer wall of the heat exchange box 4, thus brushing off the dust and impurities adhering to the outer wall of the heat exchange box 4. Then, the dust and impurities fall onto the baffle 29, and the baffle 29 is pulled outward so that the dust and impurities on it fall into the collection box 30 for collection. At the same time, the motor 15 drives the drive gear 25 to rotate, and the drive gear 25, in the action of meshing with the tooth groove 24, drives the rotating seat 19 to rotate, thereby causing the filter screen 20 at the bottom of the rotating seat 19 to brush against the second cleaning brush 22, thus brushing off the dust and impurities adhering to the filter screen 20. Then, the dust and impurities fall into the collection hopper 17 for collection.

[0037] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0038] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely 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.

[0040] 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 waste heat recovery device for thermal power generation, comprising a recovery tank (1), characterized in that, Multiple heat exchange boxes (4) are fixedly connected between the inner walls of the two sides of the recovery box (1). Connecting pipes (5) are inserted between adjacent heat exchange boxes (4). A water inlet pipe (6) is inserted into one side of the rightmost heat exchange box (4) of the recovery box (1), and the other end of the water inlet pipe (6) extends out of the recovery box (1). A water outlet pipe (7) is inserted into one side of the leftmost heat exchange box (4) of the recovery box (1), and the other end of the water outlet pipe (7) extends out of the recovery box (1). The inner walls of the two sides of the recovery box (1) are connected by a sliding joint. A mounting bracket (9) is connected to the dynamic connection. Multiple cleaning plates (10) are fixedly connected to the bottom of the mounting bracket (9). A first cleaning brush (11) is adhered to the cleaning plate (10). The first cleaning brush (11) can contact the outer wall of the heat exchange box (4). A motor (15) is fixedly connected to one side of the outer wall of the recovery box (1). A threaded rod (13) is keyed to the output end of the motor (15). A slider (14) is threaded on the outer wall of the threaded rod (13). The slider (14) is slidably connected to the recovery box by opening a groove. On one side of the collection box (1), one end of the slider (14) is fixedly connected to one end of the mounting bracket (9), and one end of the threaded rod (13) is keyed to a drive gear (25). A fixed seat (16) is fixedly connected between the inner walls of the two sides of the collection box (1). The top of the fixed seat (16) is provided with a mounting hole. A fixed ring (18) is fixedly connected to the inner circumference of the mounting hole. Multiple second cleaning brushes (22) are fixedly connected to the inner circumference of the fixed ring (18). One end of the multiple second cleaning brushes (22) is connected to the inner circumference of the fixed ring (18). A fixed plate (23) is fixedly connected, and a rotating seat (19) is rotatably connected to the top of the fixed plate (23). The outer circumference of the rotating seat (19) is provided with a toothed groove (24). The drive gear (25) passes through one side of the fixed seat (16) and meshes with the toothed groove (24). A through hole is provided between the top and bottom of the rotating seat (19). A filter element (21) is provided in the through hole. A filter screen (20) is snapped into the top and bottom of the through hole. The second cleaning brush (22) contacts the filter screen (20) of the rotating seat (19).

2. The waste heat recovery device for thermal power generation according to claim 1, characterized in that, An air inlet pipe (2) is inserted into one side of the recycling box (1), and an exhaust pipe (3) is inserted into the top of the recycling box (1).

3. A waste heat recovery device for thermal power generation according to claim 2, characterized in that, The other end of the air intake pipe (2) is fixedly connected to a solenoid valve (8).

4. A waste heat recovery device for thermal power generation according to claim 1, characterized in that, An installation box (12) is fixedly connected to one side of the outer wall of the recycling box (1), and the installation box (12) covers the outside of the threaded rod (13).

5. A waste heat recovery device for thermal power generation according to claim 1, characterized in that, The bottom of the fixed base (16) is fitted with a collection hopper (17), which has a V-shaped structure.

6. A waste heat recovery device for thermal power generation according to claim 1, characterized in that, An activated carbon plate (26) and a moisture-absorbing plate (27) are snapped together between the inner walls of the recycling box (1), with the moisture-absorbing plate (27) located above the activated carbon plate (26).

7. A waste heat recovery device for thermal power generation according to claim 1, characterized in that, The bottom end of the recycling box (1) is fixedly connected to a hopper (28), and a baffle (29) is slidably inserted into one side of the hopper (28).

8. A waste heat recovery device for thermal power generation according to claim 7, characterized in that, The bottom end of the hopper (28) is provided with a collection box (30).

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