Flue gas waste heat utilization device for thermal power plant

Abstract

The utility model relates to the technical field of thermal power plants, in particular to a thermal power plant flue gas waste heat utilization device which comprises a bearing plate, a waste heat utilization component and a flue gas filtering component, the waste heat utilization component comprises a water tank, a transmission component is installed at the lower end of the water tank, and a heat exchange plate is arranged at the upper end of the transmission component. The smoke filtering component comprises a smoke filtering tank, a rotating rod is arranged in the smoke filtering tank, a filtering plate is arranged at one end of the interior of the smoke filtering tank, and an ash scraping component is arranged on the outer side of the rotating rod. Dust on one side of the filter plate is cleaned through the bristles, dust on the inner wall of the flue gas filter tank is cleaned through the dust scraping component, the filtering smoothness of the filter plate is kept, the contact area of the heat exchange plate and the heat exchange pipe with water in the water tank is increased through reciprocating sliding of the heat exchange plate and the heat exchange pipe in the water tank, and the heat exchange efficiency is improved. And the heating efficiency of the water is improved.

Description

Technical Field

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

[0002] A thermal power plant is a factory that uses combustible materials as fuel to produce electricity. Its basic production process is as follows: when fuel is burned, it heats water to generate steam, which converts the chemical energy of the fuel into heat energy. The steam pressure drives the turbine to rotate, and the heat energy is converted into mechanical energy. Then the turbine drives the generator to rotate, which converts the mechanical energy into electrical energy. A waste heat recovery device for flue gas in thermal power plants is a device used to recover waste heat from the flue gas in thermal power plants. It can improve energy utilization efficiency and reduce energy waste and environmental pollution.

[0003] Chinese patent discloses a waste heat recovery device for flue gas in thermal power plants (authorization announcement number CN219036676U). This patented technology increases the overall travel of the flue gas through a spiral plate to heat water in a water tank. To increase heating efficiency, the side wall of the water tank is made of a material with good thermal conductivity. A rotating shaft, fan blades, stirring shaft, and spiral plate are used to drive the rotating shaft as the flue gas enters and blows towards the fan blades, thereby using the stirring shaft to agitate the water and ensure uniform heating. However, in the aforementioned waste heat recovery device, dust adheres to the filter screen, easily clogging it and affecting the smoothness of the filtration operation. Cleaning the dust is also inconvenient. Heating the water in the tank via a heat channel results in a small contact area between the water and the heat channel, which is detrimental to the heating efficiency and affects the waste heat utilization effect. Therefore, those skilled in the art have provided a waste heat recovery device for flue gas in thermal power plants to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a device for utilizing waste heat from flue gas in thermal power plants, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A waste heat recovery device for flue gas in a thermal power plant includes a support plate, a waste heat recovery component, and a flue gas filtration component. The waste heat recovery component is located on the upper side of the support plate, and the flue gas filtration component is located on one side of the waste heat recovery component. The waste heat recovery component includes a water tank, a transmission component is installed at the lower end of the water tank, and a heat exchange plate is provided at the upper end of the transmission component. A heat exchange tube is installed inside the heat exchange plate. The flue gas filtration component includes a flue gas filter canister, a rotating rod is provided inside the flue gas filter canister, a filter plate is provided at one end of the flue gas filter canister, and a scraping component is provided on the outer side of the rotating rod. A first mounting plate is provided on one side of the filter plate, and brush bristles are provided on one side of the first mounting plate. A dust collection box is provided on the lower side of the flue gas filter canister. An air guide pipe is provided on one side of the water tank, and a first connecting hose is provided on one side of the air guide pipe. An exhaust pipe is provided on the other side of the water tank, and a second connecting hose is provided on one side of the exhaust pipe. A water filling pipe is provided on the upper side of the water tank, and a water outlet pipe is provided on the lower side of the water tank. An air inlet pipe is provided on one side of the flue gas filter canister, and a fan is provided on the other side of the flue gas filter canister. A first drive motor is installed on the outer side of the flue gas filter canister at the position corresponding to the rotating rod.

[0007] As a further embodiment of this utility model: the transmission component includes a slide, a third mounting plate is provided at the lower end of the slide, a turntable is provided on the rear side of the third mounting plate, an eccentric rod is provided at the outer rear end of the turntable, a slider is provided on the outer side of the slide, a first sliding rod is provided on the upper side of the slider, a guide ring is provided on the outer side of the first sliding rod, a second transmission motor is installed on the front side of the third mounting plate corresponding to the position of the turntable, the scraping component includes a second mounting plate, a second sliding rod is provided at the outer end of the second mounting plate, a scraper is provided on the outer side of the second sliding rod, a spring is provided on the outer side of the second sliding rod at the corresponding side position of the second mounting plate and the scraper, and a sliding groove is opened at the outer end of the second mounting plate.

[0008] As a further embodiment of this utility model: the output end of the air inlet pipe is connected to the input end of the flue gas filter canister, the output end of the flue gas filter canister is connected to the input end of the fan, the output end of the fan is connected to the input end of the air guide pipe, the output end of the air guide pipe is connected to the input end of the first connecting hose, the output end of the first connecting hose is connected to the input end of the heat exchange tube, the output end of the heat exchange tube is connected to the input end of the second connecting hose, and the output end of the second connecting hose is connected to the input end of the exhaust pipe.

[0009] As a further embodiment of this utility model: the output end of the water inlet pipe is connected to the upper end of the water tank, the lower end of the water tank is connected to the input end of the water outlet pipe, the rotating rod is rotated by the first transmission motor to the internal position of the flue gas filter canister, the brush bristles are located on one side of the filter plate, and the outer side of the ash scraping component slides inside the flue gas filter canister.

[0010] As a further embodiment of this utility model: the upper end of the transmission component is fixed to the lower side of the heat exchange plate, and the heat exchange plate slides inside the water tank through the transmission component.

[0011] As a further embodiment of this utility model: the turntable rotates at the rear position of the third mounting plate via the second transmission motor, the lower end of the eccentric rod rotates at the outer end position of the turntable, the upper end of the eccentric rod rotates at the lower position of the slider, the slider slides at the outer position of the scraper, the guide ring is fixed at the lower position of the water tank, the first slide rod slides at the inner position of the guide ring, and the upper end of the first slide rod is fixed at the lower position of the heat exchange plate.

[0012] As a further embodiment of this utility model: the second mounting plate is fixed to the outer side of the rotating rod, the inner end of the second sliding rod slides to the inner side of the sliding groove, and the scraper block slides to the outer side of the second mounting plate via the second sliding rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model discloses a waste heat recovery device for flue gas in thermal power plants. The device cleans the dust on one side of the filter plate with brush bristles, cleans the dust on the inner wall of the flue gas filter canister with a dust scraping component, maintains the smoothness of the filter plate filtration, and collects the dust with a dust collection box, thereby improving the convenience of dust cleaning.

[0015] 2. By having the heat exchange plates and heat exchange tubes slide back and forth inside the water tank, the contact area between the heat exchange plates and heat exchange tubes and the water inside the water tank is increased, which is beneficial to the heating efficiency of the water and improves the waste heat utilization effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a waste heat recovery device for flue gas from a thermal power plant.

[0017] Figure 2 This is a perspective view of a waste heat utilization component in a waste heat utilization device for flue gas in a thermal power plant.

[0018] Figure 3 This is a perspective view of a flue gas filter component in a waste heat recovery device for thermal power plants.

[0019] Figure 4This is a schematic diagram of the transmission component in a waste heat recovery device for flue gas in a thermal power plant.

[0020] Figure 5 This is a schematic diagram of the ash scraping component in a waste heat recovery device for flue gas in a thermal power plant.

[0021] In the diagram: 1. Support plate; 2. Waste heat utilization component; 3. Flue gas filtration component; 5. Water tank; 6. Transmission component; 7. Heat exchange plate; 8. Heat exchange tube; 9. Flue gas filter canister; 10. Rotating rod; 11. Filter plate; 12. Dust scraping component; 13. First mounting plate; 14. Brush bristles; 15. Dust collection box; 16. Air guide pipe; 17. First connecting hose; 18. Second connecting hose; 19. Exhaust pipe; 20. Water inlet pipe; 21. Water outlet pipe; 22. Air inlet pipe; 23. Fan; 24. First drive motor; 25. Slide frame; 26. Third mounting plate; 27. Turntable; 28. Eccentric rod; 29. ​​Slider; 30. First slide rod; 31. Guide ring; 32. Second drive motor; 33. Second mounting plate; 34. Second slide rod; 35. Scraper block; 36. Spring; 37. Slide groove. Detailed Implementation

[0022] Please see Figures 1-5In this embodiment of the present invention, a waste heat utilization device for flue gas in a thermal power plant includes a support plate 1, a waste heat utilization component 2, and a flue gas filtration component 3. The waste heat utilization component 2 is located on the upper side of the support plate 1, and the flue gas filtration component 3 is located on one side of the waste heat utilization component 2. The waste heat utilization component 2 includes a water tank 5, a transmission component 6 is installed at the lower end of the water tank 5, a heat exchange plate 7 is provided at the upper end of the transmission component 6, and a heat exchange tube 8 is provided inside the heat exchange plate 7. The flue gas filtration component 3 includes a flue gas filter canister 9, a rotating rod 10 is provided inside the flue gas filter canister 9, a filter plate 11 is provided at one end of the flue gas filter canister 9, a scraper component 12 is provided on the outer side of the rotating rod 10, and a first scraper component 12 is provided on the outer side of the rotating rod 10 on one side of the filter plate 11. Mounting plate 13, brush bristles 14 are provided on one side of the first mounting plate 13, dust collection box 15 is provided on the lower side of the flue gas filter canister 9, air guide pipe 16 is provided on one side of the water tank 5, first connecting hose 17 is provided on one side of the air guide pipe 16, exhaust pipe 19 is provided on the other side of the water tank 5, second connecting hose 18 is provided on one side of the exhaust pipe 19, water filling pipe 20 is provided on the upper side of the water tank 5, water outlet pipe 21 is provided on the lower side of the water tank 5, air inlet pipe 22 is provided on one side of the flue gas filter canister 9, fan 23 is provided on the other side of the flue gas filter canister 9, first drive motor 24 is installed on the outer side of the flue gas filter canister 9 at the position corresponding to the rotating rod 10, the output end of the air inlet pipe 22 is connected to the input end of the flue gas filter canister 9, and the output end of the flue gas filter canister 9 is connected to the fan. The input end of the fan 23 is connected to the output end of the air guide pipe 16, the output end of the air guide pipe 16 is connected to the input end of the first connecting hose 17, the output end of the first connecting hose 17 is connected to the input end of the heat exchange pipe 8, the output end of the heat exchange pipe 8 is connected to the input end of the second connecting hose 18, the output end of the second connecting hose 18 is connected to the input end of the exhaust pipe 19, the output end of the water supply pipe 20 is connected to the upper end of the water tank 5, the lower end of the water tank 5 is connected to the input end of the water outlet pipe 21, the rotating rod 10 rotates to the internal position of the flue gas filter canister 9 through the first drive motor 24, the brush bristles 14 are located on one side of the filter plate 11, and the outer side of the scraper component 12 slides inside the flue gas filter canister 9. The upper end of the transmission component 6 is fixed to the lower side of the heat exchange plate 7. The heat exchange plate 7 slides inside the water tank 5 via the transmission component 6. First, a waste heat utilization device for flue gas in a thermal power plant is fixed to the usage position via the support plate 1. Clean water is added to the inside of the water tank 5 through the water inlet pipe 20. Then, the fan 23 runs, and the flue gas enters the inside of the flue gas filter canister 9 through the air inlet pipe 22. The filter plate 11 filters the dust in the flue gas. The first transmission motor 24 runs, driving the rotating rod 10 to rotate inside the flue gas filter canister 9. The rotating rod 10 drives the first mounting plate 13 to rotate. The brush bristles 14 clean the dust on one side of the filter plate 11. The scraper 35 scrapes off the dust from the inner wall of the flue gas filter canister 9. The dust enters the dust collection box 15 for temporary storage. The spring 36 contracts.The inner end of the second slide bar 34 slides inside the slide groove 37, adaptively adjusting the scraper 35. Filtered gas is introduced into the first connecting hose 17 via the fan 23 and the air guide pipe 16. The gas inside the first connecting hose 17 is then introduced into the heat exchange tube 8. The heat exchange plate 7 displaces the heat inside the heat exchange tube 8, and the heat exchange tube 8 and heat exchange plate 7 displace the water temperature inside the water tank 5. The gas inside the heat exchange tube 8 is discharged through the second connecting hose 18 and the exhaust pipe 19. The transmission component 6 drives the heat exchange plate 7 to slide back and forth inside the water tank 5, improving heat exchange efficiency.

[0023] exist Figure 2 , 3 In sections 4 and 5: the transmission component 6 includes a slide 25, a third mounting plate 26 is provided at the lower end of the slide 25, a turntable 27 is provided at the rear side of the third mounting plate 26, an eccentric rod 28 is provided at the outer rear end of the turntable 27, a slider 29 is provided on the outer side of the slide 25, a first sliding rod 30 is provided on the upper side of the slider 29, a guide ring 31 is provided on the outer side of the first sliding rod 30, and a second drive motor 32 is installed on the front side of the third mounting plate 26 at the position corresponding to the turntable 27. Component 12 includes a second mounting plate 33, a second sliding rod 34 is provided at the outer end of the second mounting plate 33, a scraper 35 is provided on the outer side of the second sliding rod 34, and a spring 36 is provided on the outer side of the second sliding rod 34 at the corresponding side of the second mounting plate 33 and the scraper 35. A groove 37 is formed at the outer end of the second mounting plate 33. The turntable 27 rotates to the rear position of the third mounting plate 26 via the second drive motor 32, and the lower end of the eccentric rod 28 rotates to the outer end position of the turntable 27. The upper end of the eccentric rod 28 rotates to the lower position of the slider 29, the slider 29 slides to the outer position of the scraper 35, the guide ring 31 is fixed to the lower position of the water tank 5, the first slide rod 30 slides to the inner position of the guide ring 31, the upper end of the first slide rod 30 is fixed to the lower position of the heat exchange plate 7, the second mounting plate 33 is fixed to the outer position of the rotating rod 10, the inner end of the second slide rod 34 slides to the inner position of the slide groove 37, and the scraper 35 passes through the second slide rod 34. Sliding on the outer side of the second mounting plate 33, the second drive motor 32 drives the turntable 27 to rotate on the rear side of the third mounting plate 26. The lower end of the eccentric rod 28 rotates on the outer end of the turntable 27, and the upper end of the eccentric rod 28 rotates on the lower side of the slider 29. The slider 29 slides back and forth on the outer side of the slide frame 25. The slider 29 drives the first slide rod 30 to slide inside the guide ring 31. The first slide rod 30 drives the heat exchange plate 7 to slide back and forth inside the water tank 5, thereby improving the heat exchange efficiency.

[0024] The working principle of this utility model is as follows: First, a waste heat utilization device for flue gas from a thermal power plant is fixed to the usage position via a support plate 1. Clean water is added to the inside of the water tank 5 through the water inlet pipe 20. Then, the fan 23 runs, and the flue gas enters the inside of the flue gas filter canister 9 through the air inlet pipe 22. The filter plate 11 filters the dust in the flue gas. The first drive motor 24 runs, driving the rotating rod 10 to rotate inside the flue gas filter canister 9. The rotating rod 10 drives the first mounting plate 13 to rotate. The brush bristles 14 clean the dust on one side of the filter plate 11. The scraper 35 scrapes off the dust on the inner wall of the flue gas filter canister 9. The dust enters the dust collection box 15 for temporary storage. The spring 36 retracts, and the inner end of the second sliding rod 34 slides inside the sliding groove 37, adaptively adjusting the scraper 35. The filtered gas passes through the fan 23. 3. The gas is introduced into the first connecting hose 17 through the gas guide pipe 16. The gas inside the first connecting hose 17 is introduced into the heat exchange tube 8. The heat exchange plate 7 replaces the heat inside the heat exchange tube 8. The heat exchange tube 8 and the heat exchange plate 7 replace the temperature of the water liquid inside the water tank 5. The gas inside the heat exchange tube 8 is discharged through the second connecting hose 18 and the exhaust pipe 19. The second drive motor 32 drives the turntable 27 to rotate behind the third mounting plate 26. The lower end of the eccentric rod 28 rotates outside the turntable 27, and the upper end of the eccentric rod 28 rotates below the slider 29. The slider 29 slides back and forth on the outside of the slide frame 25. The slider 29 drives the first slide rod 30 to slide inside the guide ring 31. The first slide rod 30 drives the heat exchange plate 7 to slide back and forth inside the water tank 5, thereby improving the heat exchange efficiency.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for flue gas from a thermal power plant, comprising a support plate (1), a waste heat recovery component (2), and a flue gas filtration component (3), wherein the waste heat recovery component (2) is located on the upper side of the support plate (1), and the flue gas filtration component (3) is located on one side of the waste heat recovery component (2), characterized in that, The waste heat utilization component (2) includes a water tank (5), a transmission component (6) is installed at the lower end of the water tank (5), a heat exchange plate (7) is provided at the upper end of the transmission component (6), and a heat exchange tube (8) is provided inside the heat exchange plate (7). The flue gas filtration component (3) includes a flue gas filter canister (9), a rotating rod (10) is provided inside the flue gas filter canister (9), a filter plate (11) is provided at one end of the flue gas filter canister (9), a scraping component (12) is provided on the outside of the rotating rod (10), and a first mounting plate (13) is provided on the outside of the rotating rod (10) at one side of the filter plate (11). A brush bristle (14) is provided on one side of the first mounting plate (13). A dust collection box (15) is provided on the lower side of the air filter canister (9). An air guide pipe (16) is provided on one side of the water tank (5). A first connecting hose (17) is provided on one side of the air guide pipe (16). An exhaust pipe (19) is provided on the other side of the water tank (5). A second connecting hose (18) is provided on one side of the exhaust pipe (19). A water filling pipe (20) is provided on the upper side of the water tank (5). A water outlet pipe (21) is provided on the lower side of the water tank (5). An air inlet pipe (22) is provided on one side of the flue gas filter canister (9). A fan (23) is provided on the other side of the flue gas filter canister (9). A first drive motor (24) is installed on the outer side of the flue gas filter canister (9) at the position corresponding to the rotating rod (10).

2. The waste heat recovery device for flue gas in a thermal power plant according to claim 1, characterized in that, The transmission component (6) includes a slide (25), a third mounting plate (26) is provided at the lower end of the slide (25), a turntable (27) is provided at the rear side of the third mounting plate (26), an eccentric rod (28) is provided at the outer rear end of the turntable (27), a slider (29) is provided on the outer side of the slide (25), a first sliding rod (30) is provided on the upper side of the slider (29), a guide ring (31) is provided on the outer side of the first sliding rod (30), and the third mounting plate (26) A second drive motor (32) is installed at the position corresponding to the turntable (27) on the front side. The scraping component (12) includes a second mounting plate (33). A second slide rod (34) is provided at the outer end of the second mounting plate (33). A scraper block (35) is provided on the outer side of the second slide rod (34). A spring (36) is provided on the outer side of the second slide rod (34) at the corresponding side position of the second mounting plate (33) and the scraper block (35). A groove (37) is opened at the outer end of the second mounting plate (33).

3. The waste heat recovery device for flue gas from a thermal power plant according to claim 1, characterized in that, The output end of the air inlet pipe (22) is connected to the input end of the flue gas filter canister (9), the output end of the flue gas filter canister (9) is connected to the input end of the fan (23), the output end of the fan (23) is connected to the input end of the air guide pipe (16), the output end of the air guide pipe (16) is connected to the input end of the first connecting hose (17), the output end of the first connecting hose (17) is connected to the input end of the heat exchange tube (8), the output end of the heat exchange tube (8) is connected to the input end of the second connecting hose (18), and the output end of the second connecting hose (18) is connected to the input end of the exhaust pipe (19).

4. The waste heat recovery device for flue gas in a thermal power plant according to claim 1, characterized in that, The output end of the water inlet pipe (20) is connected to the upper end of the water tank (5), the lower end of the water tank (5) is connected to the input end of the water outlet pipe (21), the rotating rod (10) is rotated by the first transmission motor (24) to the internal position of the flue gas filter canister (9), the bristles (14) are located on one side of the filter plate (11), and the outer side of the scraper component (12) slides to the internal position of the flue gas filter canister (9).

5. The waste heat recovery device for flue gas from a thermal power plant according to claim 1, characterized in that, The upper end of the transmission component (6) is fixed to the lower side of the heat exchange plate (7), and the heat exchange plate (7) slides inside the water tank (5) through the transmission component (6).

6. The waste heat recovery device for flue gas in a thermal power plant according to claim 2, characterized in that, The turntable (27) is rotated by the second drive motor (32) to the rear position of the third mounting plate (26). The lower end of the eccentric rod (28) is rotated to the outer end position of the turntable (27). The upper end of the eccentric rod (28) is rotated to the lower position of the slider (29). The slider (29) slides to the outer position of the scraper (35). The guide ring (31) is fixed to the lower position of the water tank (5). The first slide rod (30) slides to the inner position of the guide ring (31). The upper end of the first slide rod (30) is fixed to the lower position of the heat exchange plate (7).

7. A waste heat recovery device for flue gas from a thermal power plant according to claim 2, characterized in that, The second mounting plate (33) is fixed to the outer side of the rotating rod (10), the inner end of the second sliding rod (34) slides in the inner position of the sliding groove (37), and the scraper (35) slides on the outer side of the second mounting plate (33) through the second sliding rod (34).

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