Waste heat recovery device for thermal power generation

Abstract

The invention relates to the technical field of waste heat recovery of thermal power plants, and discloses a waste heat recovery device for thermal power generation, which comprises a recovery box body, a plurality of heat exchange boxes are fixedly connected between the inner walls of the two sides of the recovery box body, connecting pipes are inserted between the adjacent heat exchange boxes, a water inlet pipe is inserted on one side of the heat exchange box on the rightmost side of the recovery box body, and a water outlet pipe is inserted on the other side of the heat exchange box on the rightmost side of the recovery box body. A water outlet pipe is inserted into one side of the heat exchange box on the leftmost side of the recycling box, the other end of the water outlet pipe penetrates out of the recycling box, and a mounting frame is slidably connected between the inner walls of the two sides of the recycling box. A threaded rod is driven by a motor to rotate, so that a sliding block is driven to move, then a mounting frame, a cleaning plate and a first cleaning brush are driven to move, the first cleaning brush slides on the outer wall of the heat exchange box, dust and impurities attached to the outer wall of the heat exchange box are brushed down, and the heat exchange efficiency of the heat exchange box is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery in thermal power plants, and in particular to a waste heat recovery device for thermal power generation. Background Art

[0002] A thermal power plant is a plant that uses combustibles (such as coal) as fuel to produce electricity. Its basic production process is: when the fuel is burned, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] At present, when the waste heat from thermal power generation is recycled, a large amount of dust is mixed in the waste heat. During recycling, the dust particles will adhere to the heat exchange tubes or filter nets, and it is inconvenient to clean them. Over time, the heat exchange tubes or filter nets will be blocked, thereby affecting the waste heat recovery effect of thermal power generation. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a waste heat recovery device for thermal power generation, which is mainly intended to solve the problem that when the waste heat from thermal power generation is recycled, a large amount of dust is mixed in the waste heat. During the recycling process, the dust particles will adhere to the heat exchange tubes or the filter net, and it is inconvenient to clean them. Over time, the heat exchange tubes or the filter net will be blocked, thereby affecting the waste heat recovery effect of thermal power generation.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A waste heat recovery device for thermal power generation comprises a recovery box body, a plurality of heat exchange boxes are fixedly connected between the inner walls on both sides of the recovery box body, connecting pipes are inserted between adjacent heat exchange boxes, a water inlet pipe is inserted at one side of the heat exchange box on the far right of the recovery box body, and the other end of the water inlet pipe passes through the recovery box body, a water outlet pipe is inserted at one side of the heat exchange box on the far left of the recovery box body, and the other end of the water outlet pipe passes through the recovery box body, a mounting frame is slidably connected between the inner walls on both sides of the recovery box body, a plurality of cleaning plates are fixedly connected at the bottom of the mounting frame, a first cleaning brush is bonded to the cleaning plate, and the first cleaning brush can contact the outer wall of the heat exchange box, a motor is fixed to the outer wall of one side of the recovery box body, a threaded rod is keyed to the output end of the motor, and a slider is provided on the threaded sleeve of the outer wall of the threaded rod, The slider is slidably connected to one side of the recycling box by opening a slide 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 driving gear, a fixing seat is fixedly connected between the inner walls of both sides of the recycling box, a mounting hole is provided at the top of the fixing seat, a fixing ring is fixedly connected to the circumferential inner wall of the mounting hole, a plurality of second cleaning brushes are fixedly connected to the circumferential inner wall of the fixing ring, a fixing disk is fixedly connected to one end between the plurality of second cleaning brushes, the top of the fixing disk is rotatably connected to a rotating seat, a tooth groove is provided on the circumferential outer wall of the rotating seat, the driving gear passes through one side of the fixed seat and meshes with the tooth groove, a through hole is penetrated between the top and the bottom of the rotating seat, a filter element is provided in the through hole, a filter screen is clamped at the top and the bottom of the through hole, and the second cleaning brush contacts the filter screen of the rotating seat.

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

[0010] Based on the above solution, the other end of the air intake pipe is fixedly connected with a solenoid valve.

[0011] As a further solution of the present invention, a mounting box is fixedly connected to an outer wall of one side of the recovery box, and the mounting box covers the outer side of the threaded rod.

[0012] Furthermore, a collecting bucket is clamped on the bottom of the fixing seat, and the collecting bucket is a V-shaped structure.

[0013] On the basis of the above-mentioned scheme, an activated carbon plate and a moisture absorption plate are clamped between the inner walls on multiple sides of the recovery box, and the moisture absorption plate is located above the activated carbon plate.

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

[0015] Furthermore, a collecting box is provided at the bottom end of the lower 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. The threaded rod is rotated by the motor, thereby driving the slider to move, and then driving the mounting frame, the cleaning plate and the first cleaning brush to move, so that the first cleaning brush slides on the outer wall of the heat exchanger box, thereby brushing off the dust and impurities attached to the outer wall of the heat exchanger box to reduce the heat exchange efficiency of the heat exchanger box.

[0019] 2. The motor drives the active gear to rotate, and then the active gear and the tooth groove are engaged to drive the rotating seat to rotate, so that the filter screen at the bottom of the rotating seat and the second cleaning brush are moved, and the dust and impurities attached to the filter screen are brushed off to avoid affecting the filtering efficiency of the filter screen.

[0020] 3. The heat in the flue gas is exchanged with the water in the heat exchange box to heat the water in the heat exchange box. The heated hot water is discharged from the outlet pipe, thereby realizing the waste heat recovery of thermal power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a waste heat recovery device for thermal power generation proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a waste heat recovery device for thermal power generation proposed by the present invention from a bottom view;

[0023] Figure 3 This is a rear structural schematic diagram of a waste heat recovery device for thermal power generation proposed by the present invention;

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

[0025] Figure 5 This is a schematic cross-sectional view of a waste heat recovery device for thermal power generation proposed by the present invention;

[0026] Figure 6 A partial three-dimensional structural schematic diagram of a waste heat recovery device for thermal power generation proposed by the present invention;

[0027] Figure 7 A partial cross-sectional structural schematic diagram of a waste heat recovery device for thermal power generation proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the enlarged structure of point A of a waste heat recovery device for thermal power generation proposed by the present invention.

[0029] In the figure: 1. recovery 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 frame; 10. cleaning plate; 11. first cleaning brush; 12. mounting box; 13. threaded rod; 14. slider; 15. motor; 16. fixing seat; 17. collecting hopper; 18. fixing ring; 19. rotating seat; 20. filter screen; 21. filter element; 22. second cleaning brush; 23. fixing plate; 24. tooth groove; 25. driving gear; 26. activated carbon plate; 27. moisture absorption plate; 28. lower hopper; 29. ​​baffle; 30. collecting box. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Reference Figure 1-Figure 8 , a waste heat recovery device for thermal power generation, comprising a recovery box 1, a plurality of heat exchange boxes 4 are fixed between the inner walls of both sides of the recovery box 1 by bolts, a connecting pipe 5 is inserted between adjacent heat exchange boxes 4, a water inlet pipe 6 is inserted into one side of the heat exchange box 4 on the rightmost side of the recovery box 1, and the other end of the water inlet pipe 6 passes through the recovery box 1, a water outlet pipe 7 is inserted into one side of the heat exchange box 4 on the leftmost side of the recovery box 1, and the other end of the water outlet pipe 7 passes through the recovery box 1, water is input into the heat exchange box 4 from the water inlet pipe 6, and then transported to the plurality of heat exchange boxes 4 for heating through the connecting pipe 5, and the heated hot water is discharged from the water outlet pipe 7;

[0032] A mounting frame 9 is slidably connected between the inner walls of both sides of the recovery box body 1, and a plurality of cleaning plates 10 are fixed to the bottom of the mounting frame 9 by bolts. A first cleaning brush 11 is bonded to the cleaning plate 10, and the first cleaning brush 11 can contact the outer wall of the heat exchange box 4. A motor 15 is fixed to the outer wall of one side of the recovery box body 1, and a threaded rod 13 is keyed to the output end of the motor 15. A slider 14 is threadedly sleeved on the outer wall of the threaded rod 13. The slider 14 is slidably connected to one side of the recovery box body 1 by providing a slide groove, and one end of the slider 14 is fixedly connected to one end of the mounting frame 9. Driven by the motor 15, the threaded rod 13 rotates, thereby driving the slider 14 to move, and then driving the mounting frame 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, so that the dust and impurities attached to the outer wall of the heat exchange box 4 are brushed off;

[0033] One end of the threaded rod 13 is key-connected with a driving gear 25, a fixing seat 16 is fixed between the inner walls of both sides of the recovery box 1 by bolts, a mounting hole is provided at the top of the fixing seat 16, a fixing ring 18 is welded to the circumferential inner wall of the mounting hole, a plurality of second cleaning brushes 22 are fixed to the circumferential inner wall of the fixing ring 18 by bolts, a fixing plate 23 is welded at one end between the plurality of second cleaning brushes 22, a rotating seat 19 is rotatably connected to the top of the fixing plate 23, a tooth groove 24 is provided on the circumferential outer wall of the rotating seat 19, the driving gear 25 passes through one side of the fixing seat 16 and meshes with the tooth groove 24, and the rotating A through hole is provided between the top and bottom of the movable seat 19, and a filter element 21 is provided in the through hole. A filter screen 20 is clamped at the top and bottom of the through hole, and 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, and the driving gear 25 is driven to rotate by the motor 15, and then the rotating seat 19 is driven to rotate under the action of the engagement of the driving gear 25 and the tooth groove 24, so that the filter screen 20 at the bottom of the rotating seat 19 is brushed with the second cleaning brush 22, and then the dust and impurities attached to the filter screen 20 are brushed off.

[0034] An air intake pipe 2 is plugged into one side of the recovery box 1, and an exhaust pipe 3 is plugged into the top of the recovery box 1. The smoke enters the recovery box 1 from the air intake pipe 2 and is discharged from the exhaust pipe 3 after treatment. The other end of the air intake pipe 2 is fixed with a solenoid valve 8 by bolts. A mounting box 12 is fixed to the outer wall of one side of the recovery box 1 by bolts. The mounting box 12 is covered on the outside of the threaded rod 13. A collecting bucket 17 is clamped at the bottom of the fixing seat 16. The dust and impurities attached to the filter screen 20 are brushed down and fall into the collecting bucket 17 for collection. The collecting bucket 17 is a V-shaped structure. An activated carbon plate 26 and a moisture absorbing plate 27 are clamped between the side inner walls. The activated carbon plate 26 absorbs harmful substances in the flue gas. The moisture absorbing plate 27 is located above the activated carbon plate 26. The moisture generated when the flue gas exchanges heat with the heat exchange box 4 is absorbed by the moisture absorbing plate 27. A lower hopper 28 is fixed to the bottom end of the recovery box body 1 by bolts. A baffle 29 is slidably inserted on one side of the lower hopper 28. A collecting box 30 is provided at the bottom end of the lower hopper 28. Dust and impurities fall on the baffle 29, and then the baffle 29 is pulled outward so that the dust and impurities on it fall into the collecting box 30 for collection.

[0035] Working principle of this embodiment: when in use, first, water is input into the heat exchange box 4 from the water inlet pipe 6, and then transported to multiple heat exchange boxes 4 respectively through the connecting pipe 5, then, the solenoid valve 8 is opened, and the flue gas enters the recovery box 1 from the air inlet pipe 2, then, the flue gas floats upward, and when the flue gas floats 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, and the heated hot water is discharged from the water outlet pipe 7, then, the flue gas continues to float upward and passes through the filter 20 to filter the dust and particulate impurities therein, and then the activated carbon plate 26 absorbs the harmful substances in the flue gas, and then the moisture generated when the flue gas exchanges heat with the heat exchange box 4 is adsorbed by the moisture absorption plate 27, and finally, it is discharged from the exhaust pipe 3;

[0036] When the heat exchange box 4 needs to be cleaned, the motor 15 is started, and the threaded rod 13 rotates under the drive of the motor 15, thereby driving the slider 14 to move, and then driving the mounting frame 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, so that the dust and impurities attached to the outer wall of the heat exchange box 4 are brushed off, and then the dust and impurities fall on the baffle 29, and then 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 driving gear 25 is driven by the motor 15 to rotate, and then the rotating seat 19 is driven to rotate under the action of the engagement of the driving gear 25 and the tooth groove 24, so that the filter screen 20 at the bottom of the rotating seat 19 and the second cleaning brush 22 are brushed, and then the dust and impurities attached to the filter screen 20 are brushed off, and then the dust and impurities fall into the collecting bucket 17 for collection.

[0037] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0038] In the description of this article, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for thermal power generation, comprising a recovery box (1), characterized in that: A plurality of heat exchange boxes (4) are fixedly connected between the inner walls on both sides of the recovery box (1), and connecting pipes (5) are inserted between adjacent heat exchange boxes (4). A water inlet pipe (6) is inserted into one side of the heat exchange box (4) on the far right of the recovery box (1), and the other end of the water inlet pipe (6) passes through the recovery box (1). A water outlet pipe (7) is inserted into one side of the heat exchange box (4) on the far left of the recovery box (1), and the other end of the water outlet pipe (7) passes through the recovery box (1). The inner walls on both sides of the recovery box (1) are slidably connected. The heat exchange box (4) is connected to the heat exchange box (4) by a mounting frame (9), the bottom of which is fixedly connected to a plurality of cleaning plates (10), the cleaning plates (10) being bonded with a first cleaning brush (11), the first cleaning brush (11) being able to contact the outer wall of the heat exchange box (4), the outer wall of one side of the recovery box (1) being fixed with a motor (15), the output end of the motor (15) being key-connected with a threaded rod (13), the outer wall of the threaded rod (13) being threadedly sleeved with a slider (14), the slider (14) being slidably connected to the recovery box (4) by a slide groove On one side of the collection box (1), one end of the slider (14) is fixedly connected to one end of the mounting frame (9), one end of the threaded rod (13) is key-connected to a driving gear (25), a fixing seat (16) is fixedly connected between the inner walls of both sides of the collection box (1), a mounting hole is provided on the top of the fixing seat (16), a fixing ring (18) is fixedly connected to the circumferential inner wall of the mounting hole, a plurality of second cleaning brushes (22) are fixedly connected to the circumferential inner wall of the fixing ring (18), and one end between the plurality of second cleaning brushes (22) is fixedly connected to the inner wall of the fixing ring (18). A fixed disk (23) is fixedly connected, the top of the fixed disk (23) is rotatably connected to a rotating seat (19), a tooth groove (24) is provided on the circumferential outer wall of the rotating seat (19), a driving gear (25) passes through one side of the fixed seat (16) and meshes with the tooth groove (24), a through hole is penetrated 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 clamped at the top and bottom of the through hole, and a second cleaning brush (22) contacts the filter screen (20) of the rotating seat (19).

2. A waste heat recovery device for thermal power generation according to claim 1, characterized in that: An air intake pipe (2) is plugged into one side of the recovery box (1), and an exhaust pipe (3) is plugged into the top of the recovery 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. The waste heat recovery device for thermal power generation according to claim 1, characterized in that: A mounting box (12) is fixedly connected to one side outer wall of the recovery box (1), and the mounting box (12) covers the outer side of the threaded rod (13).

5. The waste heat recovery device for thermal power generation according to claim 1, characterized in that: A collecting bucket (17) is clamped at the bottom of the fixing seat (16), and the collecting bucket (17) is a V-shaped structure.

6. The waste heat recovery device for thermal power generation according to claim 1, characterized in that: An activated carbon plate (26) and a moisture absorption plate (27) are clamped between the inner walls on multiple sides of the recovery box (1), and the moisture absorption plate (27) is located above the activated carbon plate (26).

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

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

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