Centrifugal machine waste heat utilization system for flue gas treatment

Abstract

The invention relates to the technical field of waste heat recycling, in particular to a centrifugal machine waste heat utilization system for flue gas treatment. Comprising a centrifugal machine body, an air outlet of the centrifugal machine body communicates with a first channel, the first channel communicates with a second channel, the first channel is perpendicular to the second channel, a filtering assembly is arranged in the first channel, a thermal expansion driving assembly is fixed in the second channel, and a sliding block is fixed to the output end of the thermal expansion driving assembly; a water tank is fixed at one end of the second channel, the water tank and the stirring rod are concentric, the stirring rod partially extends into the water tank, a heat conduction pipe is fixed in the water tank, a motor is fixed in the connecting cover, and a spline sleeve and a spline shaft are fixed at the opposite ends of the stirring rod and a motor output shaft respectively. According to the centrifugal machine, heat of the flue gas can be recycled when the centrifugal machine body treats the high-temperature flue gas, the production cost can be reduced, and energy consumption can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery and utilization, and in particular to a waste heat utilization system of a centrifuge for flue gas treatment. Background Art

[0002] In recent years, China's lead smelting industry has developed rapidly, the demand for lead has increased significantly, and the shortage of lead ore resources has become increasingly serious. The recycled lead industry has been vigorously developed and has become an important part of the sustainable development of China's lead industry. Storage batteries are one of the main industries that consume lead, and the raw materials for recycled lead are mainly scrapped lead batteries. With the rapid development of industries such as automobiles and communications, the production and sales of storage batteries have continued to increase, and the amount of scrapped batteries has increased dramatically. In order to make full use of lead waste and reduce the pollution of lead waste to the environment and the waste of resources, it is necessary to adopt a reasonable and scientific recycling method to harmlessly treat lead batteries, so that lead metal can enter a virtuous cycle of "production-consumption-recycling".

[0003] Recycled lead smelting usually includes several main processes such as pre-treatment of lead-containing metal waste such as waste lead-acid batteries (such as disassembly, crushing, sorting, pre-desulfurization, etc.), pyrometallurgy and pollutant treatment. Domestic recycled lead plants basically adopt traditional pyrometallurgy technology.

[0004] The flue gas generated during the lead smelting process has a high heat content, and the existing treatment method is to directly cool and filter it before discharging it. However, in the preparation process of the lead paste for the positive electrode of the lead-acid battery, the paste is mixed with high-temperature hot water, and the paste is mixed by a rapid acid addition process, and the jacket of the paste mixer is passed with hot water or steam to provide an external heat source, so that the paste temperature is maintained at 70-100°C. During the mixing process of the paste mixer, the high temperature can fully generate the basic lead sulfate in the lead paste. At the same time, in the process of directly preparing sulfuric acid for batteries using recycled lead smelting flue gas, the flue gas needs to be cooled. If the heat of the flue gas generated during the lead smelting process is recovered and used in the preparation process of the lead paste for the positive electrode of the lead-acid battery, the cost can be greatly reduced, and the flue gas can be directly used to prepare sulfuric acid for batteries after being cooled. Summary of the invention

[0005] The technical problem to be solved by the present invention is to recover and utilize the heat in the flue gas generated during the lead smelting process, thereby reducing the production cost of the centrifuge waste heat utilization system for flue gas treatment. In order to achieve the above purpose, the technical solution provided by the present invention is:

[0006] A waste heat utilization system of a centrifuge for flue gas treatment includes a centrifuge body, an air inlet is arranged at the lower end of the centrifuge body, and an air outlet is arranged on one side of the centrifuge body. The flue gas enters the centrifuge body from the air inlet and is centrifugally treated, and the flue gas after centrifugation is discharged through the air outlet. The air outlet of the centrifuge body is connected to the first channel, the first channel is connected to the second channel, the first channel is perpendicular to the second channel, and the flue gas after centrifugation passes through the first channel and the second channel in sequence. A filter assembly is arranged in the first channel, and the filter assembly can filter the flue gas. A thermal expansion drive assembly is fixed in the second channel, a slider is fixed on the output end of the thermal expansion drive assembly, and a stirring rod is rotatably connected to the slider, and the stirring rod is movably sealed and connected to the second channel. A water tank is fixed at one end of the second channel, the water tank is concentric with the stirring rod, and the stirring rod partially extends into the water tank. A heat conduction pipe is fixed in the water tank, and one end of the heat conduction pipe is connected to the second channel. A connecting cover is fixed at the end of the water tank away from the second channel, and the other end of the heat conduction pipe is connected to the connecting cover. A motor is fixed in the connecting cover, and the motor in the connecting cover is connected to the motor. A fan blade is fixed on the motor output shaft, the output shaft of the motor is concentric with the stirring rod, the output shaft of the motor extends into the water tank, the output shaft of the motor is rotatably sealed and connected to the connecting cover, the stirring rod and the opposite ends of the motor output shaft are respectively fixed with a spline sleeve and a spline shaft, after the stirring rod approaches the connecting cover, the spline shaft can be inserted into the spline sleeve, a part of the water guide groove is fixed around the outside of the shell of the centrifuge body, and the other part of the water guide groove is fixed on the outside of the first channel and the second channel, one end of the water guide groove is blocked, and the other end of the water guide groove is connected to the water tank, and the upper and lower ends of the water tank are respectively fixedly connected with a water injection pipe and a water outlet pipe.

[0007] Specifically, the filter assembly includes a filter screen fixed in a first channel, a scraper rod is slidably arranged in the first channel, the scraper rod includes a straight portion and a vertical portion, the straight portion of the scraper rod is slidably connected to the first channel, the vertical portion of the scraper rod is in sliding contact with the filter screen on one side toward the centrifuge body, and the slider is fixedly connected to the straight portion of the scraper rod by a connecting rod.

[0008] Specifically, a slot hole is provided on the first channel, and the slot hole corresponds to the vertical portion of the scraper rod. A collecting bucket is detachably fixedly and sealedly connected to the first channel, and the collecting bucket seals and blocks the slot hole.

[0009] Specifically, the thermal expansion drive assembly includes an inner box fixed in the second channel, a movable plate is elastically sealed in the inner box, a push rod is slidingly sealed in the inner box, a storage cavity is formed in the inner box between the movable plate and the push rod, the storage cavity is filled with a driving medium that expands due to heat, and a slider is fixed on the end of the push rod away from the movable plate.

[0010] Specifically, one end of the movable plate facing away from the push rod is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the inner box.

[0011] Specifically, a temperature sensor is fixedly installed on the upper end of the water tank, a first control valve is installed on the water injection pipe, a water outlet is opened at the lower end of the water tank, the water outlet pipe is connected to the water outlet, and a second control valve is installed in the water outlet pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention can recover the heat of flue gas when the centrifuge body processes high-temperature flue gas. The flue gas after centrifugal treatment is filtered and heat is transferred with water in the water tank. The water absorbs the heat in the flue gas to form hot water. The hot water is transported to the preparation process of the positive electrode curing-free lead paste of the lead-acid battery for use, which can reduce production costs and save energy consumption.

[0014] 2. After the water in the water tank transfers heat with the flue gas, the temperature of the flue gas decreases, and the flue gas can be directly used to prepare sulfuric acid for batteries, further reducing production costs.

[0015] 3. When high-temperature flue gas enters the second channel, the thermal expansion drive assembly can drive the stirring rod to move into the water tank. After the spline shaft and the spline groove are plugged in and matched, the motor can drive the stirring rod to rotate. After the stirring rod rotates, it can stir the water in the water tank, thereby improving the heat exchange efficiency between the water in the water tank and the heat transfer pipe.

[0016] 4. By providing a water guide groove fixed on the outside of the centrifuge body, the first channel and the second channel, the heat exchange area can be further increased and the heat exchange efficiency can be improved.

[0017] 5. By setting a movable plate in the elastic sliding seal of the inner box, when the spline shaft and the driving medium that expands due to heat after being inserted into the spline sleeve continue to expand, the movable plate can compress the spring, thereby avoiding excessive pressure in the inner box and causing failure. At the same time, it can prevent the stirring rod from exerting a large squeezing force on the output shaft of the motor and affecting the rotation of the output shaft of the motor, thereby increasing the service life of the motor.

[0018] 6. When the slider drives the stirring rod to move into the water tank, the scraper rod moves away from the collecting bucket. When the slider drives the stirring rod to move outside the water tank, the slider drives the scraper rod to move toward the collecting bucket. At the same time, the vertical part of the scraper rod can scrape off the impurities intercepted by the filter and push them into the collecting bucket. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the present invention.

[0021] Figure 3 for Figure 2 Magnified view of area A.

[0022] Figure 4 for Figure 2 Magnified view of area B.

[0023] Figure 5 A schematic diagram of a scraper rod.

[0024] Figure 6 A schematic diagram of a collection bucket.

[0025] Figure 7 It is a schematic diagram of the water channel part outside the centrifuge body.

[0026] Figure 8 A cross-sectional view of the water tank.

[0027] The names of the parts in the attached drawings are: 1. Centrifuge body; 2. Air inlet; 3. First channel; 4. Second channel; 5. Water tank; 6. Temperature sensor; 7. Water injection pipe; 8. First control valve; 9. Connecting cover; 10. Water guide groove; 11. Scraper rod; 12. Collecting bucket; 13. Screw; 14. Filter; 15. Heat pipe; 16. Inner box; 17. Slider; 18. Bearing; 19. Stirring rod; 20. Spline sleeve; 21. Water outlet; 22. Spring; 23. Movable plate; 24. Storage chamber; 25. Push rod; 26. Spline shaft; 27. Fan blade; 28. Fixed plate; 29. ​​Motor; 30. Connecting rod; 31. Water outlet pipe; 32. Second control valve. DETAILED DESCRIPTION

[0028] like Figure 1-Figure 8 As shown, the waste heat utilization system of the centrifuge for flue gas treatment includes a centrifuge body 1, an air inlet 2 is arranged at the lower end of the centrifuge body 1, and an air outlet is arranged on one side of the centrifuge body 1. The flue gas enters the centrifuge body 1 from the air inlet 2 and is centrifugally treated, and the centrifugally treated flue gas is discharged through the air outlet.

[0029] The air outlet of the centrifuge body 1 is connected to the first channel 3, the first channel 3 is connected to the second channel 4, and the first channel 3 is perpendicular to the second channel 4. The flue gas after centrifugal treatment passes through the first channel 3 and the second channel 4 in sequence.

[0030] A filter assembly is arranged in the first channel 3. The filter assembly includes a filter screen 14 fixed in the first channel 3. The filter screen 14 can filter the smoke flowing through the first channel 3.

[0031] A scraper rod 11 is slidably disposed in the first channel 3. The scraper rod 11 includes a straight portion and a vertical portion. The straight portion of the scraper rod 11 is slidably connected to the first channel 3, and the vertical portion of the scraper rod 11 is in sliding contact with the filter screen 14 on one side facing the centrifuge body 1. The scraper rod 11 can scrape off impurities on the filter screen 14 during its movement.

[0032] The first channel 3 is provided with a slotted hole, which corresponds to the vertical portion of the scraper rod 11. The first channel 3 is detachably fixedly sealed with a collecting bucket 12, which seals and blocks the slotted hole. Specifically, the collecting bucket 12 is fixedly connected to the first channel 3 by screws 13. The vertical portion of the scraper rod 11 can scrape off impurities on the filter screen 14 and push them into the collecting bucket 12.

[0033] A thermal expansion driving assembly is fixed in the second channel 4 , a slider 17 is fixed on the output end of the thermal expansion driving assembly, and the slider 17 is fixedly connected to the straight portion of the scraper rod 11 via a connecting rod 30 .

[0034] The thermal expansion drive assembly includes an inner box 16 fixed in the second channel 4, and a movable plate 23 is elastically sealed in the inner box 16. Specifically, one end of the movable plate 23 away from the push rod 25 is fixedly connected to one end of the spring 22, and the other end of the spring 22 is fixedly connected to the inner box 16. The push rod 25 is slidably sealed in the inner box 16, and a storage cavity 24 is formed in the inner box 16 between the movable plate 23 and the push rod 25. The storage cavity 24 is filled with a driving medium that expands due to heat. The driving medium that expands due to heat is kerosene. The slider 17 is fixed on the end of the push rod 25 away from the movable plate 23.

[0035] After the smoke enters the second channel 4 , the driving medium that expands due to heat expands in the inner box 16 and pushes the push rod 25 to move toward the outside of the inner box 16 .

[0036] The slider 17 is rotatably connected with a stirring rod 19. Specifically, the stirring rod 19 is rotatably connected to the slider 17 via a bearing 18. The stirring rod 19 is movably sealed to the second channel 4. When the push rod 25 moves, the stirring rod 19 is driven to move.

[0037] A water tank 5 is fixed at one end of the second channel 4, the water tank 5 is concentric with the stirring rod 19, and the stirring rod 19 partially extends into the water tank 5. A heat pipe 15 is fixed in the water tank 5, one end of the heat pipe 15 is connected to the second channel 4, and a connection cover 9 is fixed at one end of the water tank 5 away from the second channel 4, and the other end of the heat pipe 15 is connected to the connection cover 9.

[0038] A motor 29 is fixed in the connection cover 9. Specifically, a fixing plate 28 is fixed in the connection cover 9, and the motor 29 is fixed on the fixing plate 28. A fan blade 27 is fixed on the output shaft of the motor 29 in the connection cover 9. The output shaft of the motor 29 is concentric with the stirring rod 19. The output shaft of the motor 29 extends into the water tank 5, and the output shaft of the motor 29 is rotatably sealed and connected to the connection cover 9. The spline sleeve 20 and the spline shaft 26 are fixed to the opposite ends of the stirring rod 19 and the output shaft of the motor 29, respectively. After the stirring rod 19 is close to the connection cover 9, the spline shaft 26 can be inserted into the spline sleeve 20.

[0039] A portion of the water channel 10 is fixed around the outer side of the shell of the centrifuge body 1 , and another portion of the water channel 10 is fixed outside the first channel 3 and the second channel 4 . One end of the water channel 10 is blocked, and the other end of the water channel 10 is connected to the water tank 5 .

[0040] The upper and lower ends of the water tank 5 are fixedly connected with a water injection pipe 7 and a water outlet pipe 31. A temperature sensor 6 is fixedly installed on the upper end of the water tank 5. A first control valve 8 is installed on the water injection pipe 7. A water outlet 21 is opened at the lower end of the water tank 5. The water outlet pipe 31 is connected with the water outlet 21. A second control valve 32 is installed in the water outlet pipe 31.

[0041] During operation, the first control valve 8 is opened, the second control valve 32 is closed, and water is added to the water tank 5 through the water injection pipe 7. As the water in the water tank 5 increases, the water in the water tank 5 can enter the water guide groove 10.

[0042] At the same time, the motor 29 is started. After the motor 29 is started, the fan blade 27 rotates. After the fan blade 27 rotates, the air in the heat pipe 15, the second channel 4 and the first channel 3 can be extracted, so that negative pressure is generated in the heat pipe 15, the second channel 4 and the first channel 3, ensuring that the smoke discharged from the air outlet of the centrifuge body 1 can flow through the first channel 3, the second channel 4, the heat pipe 15 and the connecting cover 9 in sequence before being discharged.

[0043] The flue gas discharged from the air outlet of the centrifuge body 1 first passes through the first channel 3. The flue gas is filtered by the filter 14 during the flow in the first channel 3, and the impurities in the flue gas are intercepted by the filter 14. The flue gas enters the second channel 4 after being discharged from the first channel 3. The flue gas entering the second channel 4 exchanges heat with the driving medium that is heated and expanded in the inner box 16. The driving medium that is heated and expanded expands after the temperature rises, thereby pushing the push rod 25, the slider 17 and the stirring rod 19 to move toward the water tank 5. When the slider 17 moves toward the water tank 5, the slider 17 drives the scraper 11 to move toward the water tank 5 through the connecting rod 30.

[0044] When the spline shaft 26 is inserted into the spline sleeve 20, the motor 29 drives the stirring rod 19 to rotate, and the stirring rod 19 rotates to stir the water in the water tank 5. After the flue gas is discharged from the second channel 4, it enters the connection cover 9 through the heat pipe 15, and the flue gas discharged from the connection cover 9 flows to the equipment for preparing sulfuric acid for storage batteries.

[0045] During the process of flue gas flowing in the second channel 4, when the spline shaft 26 is inserted into the spline sleeve 20 and the temperature of the flue gas continues to rise, the driving medium that expands due to heat continues to expand, and the movable plate 23 can compress the spring 22, thereby avoiding the excessive pressure in the inner box 16 and causing a malfunction. At the same time, it can prevent the stirring rod 19 from generating a large squeezing force on the output shaft of the motor 29 and affecting the rotation of the output shaft of the motor 29, thereby improving the service life of the motor 29.

[0046] When the flue gas flows through the centrifuge body 1 , the first channel 3 and the second channel 4 , heat transfer can occur between the flue gas and the water in the water guide groove 10 .

[0047] When the flue gas flows through the heat conducting pipe 15, the flue gas transfers heat with the water in the water tank 5 through the heat conducting pipe 15, and the heat in the flue gas is transferred to the water in the water tank 5, and the temperature of the water in the water tank 5 increases. The temperature of the water in the water tank 5 can be known through the temperature sensor 6. When the water temperature in the water tank 5 reaches the set temperature, the second control valve 32 in the water outlet pipe 31 is opened to discharge the water in the water tank 5. Then the first control valve 8 is opened, and water is continuously added to the water tank 5 through the water injection pipe 7 to continue cooling the flue gas.

[0048] When the flue gas treatment is completed, the temperature of the driving medium that expands due to heat in the inner box 16 decreases and contracts, and the push rod 25 drives the stirring rod 19 away from the motor 29 through the slider 17. When the spline shaft 26 withdraws from the spline sleeve 20, the stirring rod 19 stops rotating.

[0049] When the slider 17 moves away from the motor 29 , the slider 17 drives the scraper rod 11 to move away from the water tank 5 through the connecting rod 30 . The vertical portion of the scraper rod 11 can scrape off the impurities intercepted on the filter screen 14 and push the scraped impurities into the collection bucket 12 .

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas treatment centrifuge waste heat utilization system, comprising a centrifuge body (1), an air inlet (2) being arranged at the lower end of the centrifuge body (1), and an air outlet being arranged at one side of the centrifuge body (1), characterized in that: The air outlet of the centrifuge body (1) is in communication with the first channel (3), the first channel (3) is in communication with the second channel (4), the first channel (3) and the second channel (4) are perpendicular, a filter assembly is arranged in the first channel (3), a thermal expansion drive assembly is fixed in the second channel (4), a slider (17) is fixed on the output end of the thermal expansion drive assembly, a stirring rod (19) is rotatably connected to the slider (17), the stirring rod (19) is movably sealedly connected to the second channel (4), a water tank (5) is fixed at one end of the second channel (4), the water tank (5) and the stirring rod (19) are concentric, a portion of the stirring rod (19) extends into the water tank (5), a heat conduction pipe (15) is fixed in the water tank (5), one end of the heat conduction pipe (15) is in communication with the second channel (4), a connection cover (9) is fixed at one end of the water tank (5) away from the second channel (4), the other end of the heat conduction pipe (15) is in communication with the connection cover (9), a heat conduction pipe (15) is fixed in the connection cover (9), A motor (29) is provided, and a fan blade (27) is fixed on the output shaft of the motor (29) in the connecting cover (9). The output shaft of the motor (29) is concentric with the stirring rod (19), and the output shaft of the motor (29) extends into the water tank (5). The output shaft of the motor (29) is rotatably sealed and connected to the connecting cover (9). The opposite ends of the stirring rod (19) and the output shaft of the motor (29) are respectively fixed with a spline sleeve (20) and a spline shaft (26). The stirring rod (19) is close to the water tank (5). The spline shaft (26) can be inserted into the spline sleeve (20) near the connection cover (9), a part of the water guide groove (10) is fixed around the outer side of the shell of the centrifuge body (1), and the other part of the water guide groove (10) is fixed on the outer side of the first channel (3) and the second channel (4). One end of the water guide groove (10) is blocked, and the other end of the water guide groove (10) is connected to the water tank (5). The upper and lower ends of the water tank (5) are fixedly connected with a water injection pipe (7) and a water outlet pipe (31).

2. The centrifuge waste heat utilization system for flue gas treatment according to claim 1, characterized in that: The filter assembly comprises a filter screen (14) fixed in a first channel (3), a scraper rod (11) is slidably arranged in the first channel (3), the scraper rod (11) comprises a straight portion and a vertical portion, the straight portion of the scraper rod (11) is slidably connected to the first channel (3), the vertical portion of the scraper rod (11) is in slidable contact with the filter screen (14) toward one side of the centrifuge body (1), and the slider (17) is fixedly connected to the straight portion of the scraper rod (11) via a connecting rod (30).

3. The centrifuge waste heat utilization system for flue gas treatment according to claim 2, characterized in that: The first channel (3) is provided with a slotted hole, which corresponds to the vertical portion of the scraper rod (11). The first channel (3) is detachably fixedly sealed with a collecting bucket (12), which seals and blocks the slotted hole.

4. The centrifuge waste heat utilization system for flue gas treatment according to claim 3, characterized in that: The collecting hopper (12) is fixedly connected to the first channel (3) via screws (13).

5. The centrifuge waste heat utilization system for flue gas treatment according to claim 1, characterized in that: The thermal expansion drive assembly comprises an inner box (16) fixed in the second channel (4), a movable plate (23) being elastically sealed in the inner box (16), a push rod (25) being slidably sealed in the inner box (16), a storage cavity (24) being formed in the inner box (16) between the movable plate (23) and the push rod (25), the storage cavity (24) being filled with a driving medium that expands due to heat, and a slider (17) being fixed on one end of the push rod (25) away from the movable plate (23).

6. The centrifuge waste heat utilization system for flue gas treatment according to claim 5, characterized in that: One end of the movable plate (23) away from the push rod (25) is fixedly connected to one end of the spring (22), and the other end of the spring (22) is fixedly connected to the inner box (16).

7. The centrifuge waste heat utilization system for flue gas treatment according to claim 5, characterized in that: The driving medium that expands due to heat is kerosene.

8. The centrifuge waste heat utilization system for flue gas treatment according to claim 1, characterized in that: A temperature sensor (6) is fixedly mounted on the upper end of the water tank (5); a first control valve (8) is mounted on the water injection pipe (7); a water outlet (21) is provided at the lower end of the water tank (5); a water outlet pipe (31) is connected to the water outlet (21); and a second control valve (32) is mounted in the water outlet pipe (31).

9. The centrifuge waste heat utilization system for flue gas treatment according to claim 1, characterized in that: The stirring rod (19) is rotatably connected to the slider (17) via a bearing (18).

10. The centrifuge waste heat utilization system for flue gas treatment according to claim 1, characterized in that: A fixing plate (28) is fixed inside the connection cover (9), and the motor (29) is fixed on the fixing plate (28).

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