A cracking waste gas purification device for lithium battery production

Abstract

This invention relates to the field of waste gas treatment, and more particularly to a purification device for pyrolysis waste gas from lithium battery production. Existing devices are inconvenient for cleaning condensed tar, and the tar is highly viscous, easily clogging pipes during discharge and adhering to equipment, resulting in residue. A purification device for pyrolysis waste gas from lithium battery production includes a base plate, etc.; four support frames are fixedly connected to the base plate, and an isolation frame is fixedly connected to the base plate. The isolation frame has an opening at its upper part, and a condensation frame is fixedly connected to the isolation frame. The condensation frame has an internal cavity, and a gas guide frame is fixedly connected to the support frames. After the collection box is removed, a return spring drives the partition plate to move horizontally to its original position, causing the partition plate to block the outlet at the bottom of the inclined hopper. This allows the tar that did not flow into the collection box after cleaning to be collected in the inclined hopper, making regular cleaning of the tar adhering to the device more convenient.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment, and more particularly to a purification device for pyrolysis waste gas used in lithium battery production. Background Technology

[0002] In the production process of lithium batteries, high-temperature processing steps such as granulation and carbonization of the negative electrode material generate pyrolysis waste gas. This pyrolysis waste gas is generally treated by combustion. However, since this pyrolysis waste gas contains tar components, which can not only clog pipes and equipment, but also pollute the environment if not directly discharged, it is necessary to remove the tar components from the pyrolysis waste gas first. This can be achieved by condensing the high-temperature pyrolysis waste gas.

[0003] However, existing devices are not convenient for cleaning condensed tar, and the tar is highly viscous, which can easily clog pipes when discharged and also adhere to equipment, causing residue. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a lithium battery production pyrolysis waste gas purification device that is easier to clean tar, easier to reduce tar viscosity, improves its fluidity, and is less prone to clogging and residue.

[0005] The technical solution is as follows: A pyrolysis waste gas purification device for lithium battery production includes a base plate, four support frames fixedly connected to the base plate, an isolation frame fixedly connected to the base plate with an opening at the top, a condensation frame fixedly connected to the isolation frame, a cavity inside the condensation frame, a gas guide frame fixedly connected to the support frames, the gas guide frame communicating with the isolation frame through the central hole of the condensation frame, an air inlet pipe fixedly connected to the gas guide frame, an insulation frame outside the condensation frame, a circulating condenser fixedly connected to the support frames, the inlet and outlet of the circulating condenser being connected to the condensation frame, an outlet pipe fixedly connected to one side of the isolation frame, an oil scraping mechanism on the base plate for scraping off condensed tar, and an oil guiding mechanism on the isolation frame for guiding and collecting the scraped tar.

[0006] Furthermore, the oil scraping mechanism includes an air guide slope, which is fixedly connected to the air guide frame. A fixed isolation cover is fixedly connected to the base plate, and an electric telescopic rod is fixedly connected to the middle of the base plate. A movable isolation cover is fixedly connected to the electric telescopic rod, and the movable isolation cover is slidably and sealingly connected to the fixed isolation cover. The upper end of the movable isolation cover contacts the bottom of the air guide slope, and a ring scraper is fixedly connected to the movable isolation cover. The ring scraper contacts the inner wall of the air guide frame.

[0007] Furthermore, the oil guiding mechanism includes two collection boxes, both of which are placed on the base plate and contact the isolation frame. Elliptical locking blocks are rotatably connected to both sides of the isolation frame, and these elliptical locking blocks contact the collection boxes. Each elliptical locking block is fixedly connected to a handle. Two limiting blocks are fixedly connected to both sides of the isolation frame, and each elliptical locking block contacts one of the limiting blocks. Two vertical frames are fixedly connected to the inner wall of the isolation frame, and these vertical frames are hollow. An outer frame and an inner frame are fixedly connected between the two vertical frames. Two oil guiding inclined surfaces are fixedly connected between the inner frame and the outer frame. Two inclined buckets are fixedly connected to the inner wall of the isolation frame, and a partition is slidably connected to each inclined bucket. A return spring is connected between the partition and the inclined bucket. A baffle is fixedly connected to one side of each partition, and the baffle contacts the side of the collection box.

[0008] Furthermore, it also includes a ventilation mechanism, which is disposed within the vertical frame. The ventilation mechanism is used to introduce high-temperature steam into the vertical frame to soften the tar. The ventilation mechanism includes a steam generator, which is fixedly connected to the base plate. Two steam booster pumps are fixedly connected to the outer wall of the isolation frame and are connected to the steam generator. T-shaped pipes are fixed on both sides of the isolation frame and are connected to the steam booster pumps. Several connecting straight pipes are fixedly connected to one side of the T-shaped pipes and are connected to the vertical frame. Each connecting straight pipe is fixedly connected to a thin pipe, which is closed at the top and open at the bottom. Several inclined pipes are fixedly connected to each thin pipe.

[0009] Furthermore, it also includes an air-sealing mechanism, which is disposed on the vertical frame and is used to seal the upper part of the vertical frame. The air-sealing mechanism includes two electric push rods, both of which are fixedly connected to the isolation frame. Two round rods are fixedly connected to the side of each vertical frame. The two round rods form a group, and a sliding plate is slidably connected between the two round rods in each group. The telescopic shaft of each electric push rod passes through the isolation frame, and a push plate is fixedly connected to the telescopic shaft of each electric push rod. A compression spring is connected between the push plate and the sliding plate. Swing plates are rotatably connected to both sides of the outer frame, and a torsion spring is connected between the swing plates and the outer frame.

[0010] The beneficial effects are as follows: 1. After the collection box is removed, the reset spring will drive the partition to move horizontally and reset, so that the partition blocks the outlet at the bottom of the inclined bucket. This allows the tar that did not flow into the collection box to be collected in the inclined bucket after the collection box is removed for cleaning, making it more convenient to clean the tar attached to the device regularly.

[0011] 2. Before stopping the flow of exhaust gas for tar cleaning, the steam generator and steam booster pump can be started first to pump high-temperature steam into the T-shaped pipe, and then into the thin pipe through the connecting straight pipe. The high-temperature and high-pressure steam in the thin pipe will be sprayed out from each inclined pipe and enter the vertical frame. Then the tar will be scraped and cleaned. When the tar flowing into the vertical frame comes into contact with the high-temperature steam, it will soften due to the increase in temperature, and its viscosity will decrease and its fluidity will increase. This makes it less likely for the tar to clog the vertical frame and makes it easier to clean. In addition, the pipe openings of the inclined pipes face downwards to prevent tar from flowing in.

[0012] 3. Start the electric push rod, which drives the two push plates to move horizontally towards the vertical frame. The horizontal movement of the push plates will cause the sliding plate to push open the swing plate and insert into the vertical frame through the compression spring. The sliding plate will contact the two oil guide slopes and cover the upper part of the vertical frame. This allows the high-temperature steam that enters the vertical frame from the thin tube to stay inside for a period of time. This prolongs the contact time between the high-temperature steam and the tar, allowing the tar to be softened more fully and less likely to remain. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a cross-sectional three-dimensional structural diagram of the air guide frame and condenser frame of the present invention.

[0015] Figure 3 This is a partial three-dimensional structural schematic diagram of the oil guiding mechanism of the present invention.

[0016] Figure 4 This is a three-dimensional structural diagram of the oil guiding mechanism and the oil scraping mechanism of the present invention.

[0017] Figure 5 This is a cross-sectional perspective view of the fixed isolation cover and the movable isolation cover of the present invention.

[0018] Figure 6 This is a three-dimensional structural diagram of the vertical frame, outer frame, and inner frame of the present invention.

[0019] Figure 7 This is a cross-sectional three-dimensional structural diagram of the outer frame of the present invention.

[0020] Figure 8 This is a cross-sectional three-dimensional structural diagram of the inclined bucket of the present invention.

[0021] Figure 9 This is a three-dimensional structural diagram of the ventilation mechanism of the present invention.

[0022] Figure 10 This is a three-dimensional structural diagram of the T-shaped tube, the connecting straight tube, and the thin tube of the present invention.

[0023] Figure 11 This is a three-dimensional structural diagram of the air-sealing mechanism of the present invention.

[0024] Figure 12 For the present invention Figure 11 A magnified three-dimensional structural diagram at point A in the middle.

[0025] Figure 13 This is a schematic diagram of the three-dimensional structure of the outer frame and the swing plate of the present invention.

[0026] Figure 14 For the present invention Figure 13 A magnified three-dimensional structural diagram at point B.

[0027] Reference numerals: 1_Base plate, 2_Support frame, 31_Isolation frame, 32_Condensation frame, 33_Air guide frame, 34_Inlet pipe, 35_Insulation frame, 36_Circulating condenser, 37_Outlet pipe, 41_Air guide slope, 42_Fixed isolation cover, 43_Electric telescopic rod, 44_Moving isolation cover, 45_Circular scraper, 51_Collection box, 52_Oval locking block, 53_Handle, 54_Limiting block, 55_Vertical frame 56_Outer frame, 57_Inner frame, 58_Oil guide slope, 59_Sloping bucket, 510_Baffle, 511_Reset spring, 512_Baffle, 61_Steam generator, 62_Steam booster pump, 63_T-tube, 64_Connecting straight pipe, 65_Thin tube, 66_Sloping tube, 71_Electric push rod, 72_Round rod, 73_Sliding plate, 74_Push plate, 75_Compression spring, 76_Swing plate, 77_Torsion spring. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings.

[0029] A device for purifying pyrolysis waste gas used in lithium battery production, such as Figure 1-14 As shown, the device includes a base plate 1, four support frames 2 fixedly connected to the base plate 1, an isolation frame 31 fixedly connected to the base plate 1, an opening at the top of the isolation frame 31, a condenser frame 32 fixedly connected to the isolation frame 31, and a cavity inside the condenser frame 32. A gas guide frame 33 is fixedly connected to the support frames 2, and the gas guide frame 33 communicates with the isolation frame 31 through the central hole of the condenser frame 32. An air inlet pipe 34 is fixedly connected to the gas guide frame 33. An insulation frame 35 is provided on the outside of the condenser frame 32. A circulating condenser 36 is fixedly connected to the support frames 2, and both the inlet and outlet of the circulating condenser 36 are connected to the condenser frame 32. An air outlet pipe 37 is fixedly connected to one side of the isolation frame 31. An oil scraping mechanism is provided on the base plate 1 to scrape off the condensed tar. An oil guiding mechanism is provided on the isolation frame 31 to guide and collect the scraped tar.

[0030] The oil scraping mechanism includes an air guide slope 41, which is fixedly connected to the air guide frame 33. A fixed isolation cover 42 is fixedly connected to the base plate 1. An electric telescopic rod 43 is fixedly connected to the middle of the base plate 1. A movable isolation cover 44 is fixedly connected to the electric telescopic rod 43. The movable isolation cover 44 is slidably and sealingly connected to the fixed isolation cover 42. The upper end of the movable isolation cover 44 contacts the bottom of the air guide slope 41. A ring scraper 45 is fixedly connected to the movable isolation cover 44. The ring scraper 45 contacts the inner wall of the air guide frame 33.

[0031] The oil guiding mechanism includes two collection boxes 51, both of which are placed on the base plate 1 and contact the isolation frame 31. Elliptical locking blocks 52 are rotatably connected to both sides of the isolation frame 31, and each elliptical locking block 52 contacts the collection box 51. A handle 53 is fixedly connected to each elliptical locking block 52. Two limiting blocks 54 are fixedly connected to both sides of the isolation frame 31, and the elliptical locking block 52 contacts one of the limiting blocks 54. Two vertical... The frame 55 is hollow. An outer frame 56 and an inner frame 57 are fixedly connected between the two vertical frames 55. Two oil guiding inclined surfaces 58 are fixedly connected between the inner frame 57 and the outer frame 56. Two inclined hoppers 59 are fixedly connected to the inner wall of the isolation frame 31. A partition 510 is slidably connected to each inclined hopper 59. A return spring 511 is connected between the partition 510 and the inclined hopper 59. A baffle 512 is fixedly connected to one side of each partition 510. The baffle 512 contacts the side of the collection box 51.

[0032] In actual pyrolysis waste gas treatment, initially, the condenser frame 32 is filled with condensate, and the return spring 511 is in a stretched state, which lowers the temperature of the inner wall of the central hole of the condenser frame 32. Then, during lithium battery production, the high-temperature pyrolysis waste gas generated during the firing of the negative electrode material is introduced through the inlet pipe 34. The waste gas is then divided into two airflows in the guide frame 33. The two airflows flow towards each other at the bottom of the guide frame 33, thereby slowing down the incoming waste gas and reducing its flow speed. Then, the waste gas continues to flow downwards, and the circulating condenser 36 carries the condensate in the condenser frame 32 from bottom to top. The gaseous tar in the high-temperature exhaust gas condenses into liquid tar when it passes through the inner wall of the central hole of the condenser frame 32, which has a lower temperature. Due to the high viscosity of tar, the liquid tar adheres to the inner wall of the central hole of the condenser frame 32, thus removing the tar component from the exhaust gas. The exhaust gas then continues downward into the isolation frame 31 and is discharged from the exhaust pipe 37. The guide slope 41 guides the exhaust gas entering the condenser frame 32 to the inner wall of the central hole of the condenser frame 32 to the greatest extent. In addition, the deceleration effect of the guide frame 33 on the airflow makes the removal of tar from the exhaust gas more thorough. When the gas stops... After stopping the flow of exhaust gas, the electric telescopic rod 43 is activated, causing the movable isolation cover 44 and the ring scraper 45 to move downwards, scraping off the liquid tar on the inner wall of the central hole of the condensation frame 32. The scraped tar flows downwards between the outer frame 56 and the inner frame 57, and is then diverted by two oil guiding slopes 58, allowing the tar to flow from the two vertical frames 55 into the inclined hopper 59 below, and finally into the collection box 51. Then, the operator pulls the handle 53 upwards, causing the elliptical locking block 52 to rotate 90°, and then the elliptical locking block 52 disengages from the collection box 51, no longer pressing down on the collection box 51. This allows the operator to remove the collection box 51 for cleaning. After removing the collection box 51, the return spring 511 will drive the partition 510 to move horizontally to reset, so that the partition 510 blocks the outlet at the bottom of the inclined bucket 59. This allows the tar that did not flow into the collection box 51 after it is removed for cleaning to be collected in the inclined bucket 59. After the collection box 51 is put back in, it will squeeze the baffle 512 to open the partition 510, allowing this part of the tar to flow back into the collection box 51. This makes it more convenient to clean the tar adhering to the device periodically.

[0033] Example 2 Based on Example 1, such as Figure 9-14As shown, it also includes a ventilation mechanism, which is disposed within the vertical frame 55. The ventilation mechanism is used to introduce high-temperature steam into the vertical frame 55 to soften the tar. The ventilation mechanism includes a steam generator 61, which is fixedly connected to the base plate 1. Two steam booster pumps 62 are fixedly connected to the outer wall of the isolation frame 31. The steam booster pumps 62 are connected to the steam generator 61. T-shaped pipes 63 are fixed on both sides of the isolation frame 31. The T-shaped pipes 63 are connected to the steam booster pumps 62. Several connecting straight pipes 64 are fixedly connected to one side of the T-shaped pipes 63. The connecting straight pipes 64 are connected to the vertical frame 55. Each connecting straight pipe 64 is fixedly connected to a thin pipe 65. The thin pipe 65 is closed at the top and open at the bottom. Several inclined pipes 66 are fixedly connected to each thin pipe 65.

[0034] It also includes an air-sealing mechanism, which is disposed on the vertical frame 55. The air-sealing mechanism is used to seal the upper part of the vertical frame 55. The air-sealing mechanism includes two electric push rods 71, both of which are fixedly connected to the isolation frame 31. Two round rods 72 are fixedly connected to the side of each vertical frame 55. The two round rods 72 form a group. A sliding plate 73 is slidably connected between the two round rods 72 in each group. The telescopic shaft of each electric push rod 71 passes through the isolation frame 31. A push plate 74 is fixedly connected to the telescopic shaft of each electric push rod 71. A compression spring 75 is connected between the push plate 74 and the sliding plate 73. Swing plates 76 are rotatably connected to both sides of the outer frame 56. A torsion spring 77 is connected between the swing plate 76 and the outer frame 56.

[0035] Before stopping the flow of exhaust gas for tar removal, the steam generator 61 and steam booster pump 62 can be started to pump high-temperature steam into the T-shaped pipe 63, and then into the thin pipe 65 through the connecting straight pipe 64. The high-temperature and high-pressure steam entering the thin pipe 65 will be sprayed out from each inclined pipe 66 and enter the vertical frame 55. Then the scraping and cleaning of tar will begin. When the tar flowing into the vertical frame 55 comes into contact with the high-temperature steam, it will soften due to the increase in temperature, and its viscosity will decrease and its fluidity will increase. This makes it less likely for the tar to clog the vertical frame 55 and makes it easier to clean. In addition, the pipe openings of the inclined pipes 66 face downwards to prevent tar from flowing in.

[0036] After the ring scraper 45 moves downward to scrape off the tar and stops moving, the electric push rod 71 is activated, which drives the two push plates 74 to move horizontally towards the vertical frame 55. The horizontal movement of the push plates 74 will cause the sliding plate 73 to push open the swing plate 76 and insert into the vertical frame 55 through the compression spring 75. The sliding plate 73 will contact the two oil guide slopes 58 and cover the upper part of the vertical frame 55. This allows the high-temperature steam introduced into the vertical frame 55 from the thin tube 65 to stay inside for a period of time. This prolongs the contact time between the high-temperature steam and the tar, so that the tar can be softened more fully and is less likely to leave residue.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pyrolysis off-gas purification device for lithium battery production, characterized by, The utility model provides a condensing device, including bottom plate (1), four support frames (2) are fixedly connected on the bottom plate (1), the isolation frame (31) is fixedly connected on the bottom plate (1), the isolation frame (31) upper opening, the condensing frame (32) is fixedly connected on the isolation frame (31), the air guide frame (33) is fixedly connected on the support frame (2), the air guide frame (33) with the isolation frame (31) is communicated through the center hole of condensing frame (32), the air guide frame (33) is fixedly connected with the air inlet pipeline (34), the condensing frame (32) outside is equipped with the heat preservation frame (35), the circulating condenser (36) is fixedly connected on the support frame (2), and the water inlet and the water outlet of circulating condenser (36) are connected with condensing frame (32), the air outlet pipeline (37) is fixedly connected on the one side of isolation frame (31), the bottom plate (1) is equipped with the oil scraping mechanism, and the oil scraping mechanism is used for scraping the condensed tar, and the oil guide mechanism is equipped on the isolation frame (31), and the oil guide mechanism is used for guiding the scraped tar and collecting.

2. The pyrolysis off-gas purification device for lithium battery production according to claim 1, characterized in that, The condensing frame (32) is internally provided with a cavity. 3.The split exhaust gas purification device for lithium battery production of claim 1, characterized in that, The oil scraping mechanism includes a wind guide slope (41) fixedly connected in the air guide frame (33), a fixed isolation cover (42) fixedly connected to the bottom plate (1), a middle electric telescopic rod (43) fixedly connected to the bottom plate (1), a movable isolation cover (44) fixedly connected to the electric telescopic rod (43), a sliding sealing connection between the movable isolation cover (44) and the fixed isolation cover (42), a contact between the upper end of the movable isolation cover (44) and the bottom of the wind guide slope (41), a ring scraper (45) fixedly connected to the movable isolation cover (44), and a contact between the ring scraper (45) and the inner wall of the air guide frame (33).

4. The split exhaust gas purification device for lithium battery production according to claim 1, characterized in that, The oil guiding mechanism includes two collection boxes (51), both of which are placed on the base plate (1) and are in contact with the isolation frame (31). Elliptical locking blocks (52) are rotatably connected to both sides of the isolation frame (31), and each elliptical locking block (52) is in contact with the collection box (51). A handle (53) is fixedly connected to each elliptical locking block (52). Two limiting blocks (54) are fixedly connected to both sides of the isolation frame (31), and each elliptical locking block (52) contacts one of the limiting blocks (54). Two vertical frames (550 ... 5) The vertical frame (55) is hollow. An outer frame (56) and an inner frame (57) are fixedly connected between the two vertical frames (55). Two oil guide slopes (58) are fixedly connected between the inner frame (57) and the outer frame (56). Two inclined buckets (59) are fixedly connected to the inner wall of the isolation frame (31). A partition (510) is slidably connected to each inclined bucket (59). A reset spring (511) is connected between the partition (510) and the inclined bucket (59). A baffle (512) is fixedly connected to one side of each partition (510). The baffle (512) contacts the side of the collection box (51).

5. The split exhaust gas purification device for lithium battery production according to claim 4, characterized in that, It also includes a ventilation mechanism, which is set inside the vertical frame (55). The ventilation mechanism is used to introduce high-temperature steam into the vertical frame (55) to soften the tar. The ventilation mechanism includes a steam generator (61), which is fixedly connected to the base plate (1). Two steam booster pumps (62) are fixedly connected to the outer wall of the isolation frame (31). The steam booster pumps (62) are connected to the steam generators (61). T-shaped pipes (63) are fixed on both sides of the isolation frame (31). The T-shaped pipes (63) are connected to the steam booster pumps (62). Several connecting straight pipes (64) are fixedly connected to one side of the T-shaped pipes (63). The connecting straight pipes (64) are connected to the vertical frame (55). Each connecting straight pipe (64) is fixedly connected to a thin pipe (65). Each thin pipe (65) is fixedly connected to several inclined pipes (66).

6. The split exhaust gas purification device for lithium battery production according to claim 5, characterized in that, The upper part of the tube (65) is closed, and the lower part is open.

7. The split exhaust gas purification device for lithium battery production according to claim 4, characterized in that, It also includes an air-sealing mechanism, which is set on the vertical frame (55) and is used to seal the upper part of the vertical frame (55). The air-sealing mechanism includes two electric push rods (71), which are fixedly connected to the isolation frame (31). Two round rods (72) are fixedly connected to the side of each vertical frame (55). The two round rods (72) form a group. A sliding plate (73) is slidably connected between the two round rods (72) in each group. The telescopic shaft of each electric push rod (71) passes through the isolation frame (31). A push plate (74) is fixedly connected to the telescopic shaft of each electric push rod (71). A compression spring (75) is connected between the push plate (74) and the sliding plate (73). Swing plates (76) are rotatably connected to both sides of the outer frame (56). A torsion spring (77) is connected between the swing plate (76) and the outer frame (56).

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