Dust removal device applied to lithium battery recovery and defluorination process

Abstract

The dust removal device comprises a defluorination flue gas pipe, a wet removal outer cylinder is arranged at the bottom of the defluorination flue gas pipe, a rotary inner cylinder is arranged in the wet removal outer cylinder, and a flue gas exhaust bent pipe connected with the defluorination flue gas pipe is arranged at the top of the rotary inner cylinder and the top of the wet removal outer cylinder; the rotary inner cylinder drives related parts to synchronously rotate, so that waste gas fully impacts multiple structures, and efficient primary dust removal is realized by cooperating with disturbance gas ring shifting piece dislocation and airflow pressure difference; water mist is utilized to form accumulated water sediment, primary filtration and separation are achieved through the conical disc and the like, then water is secondarily filtered through the microfiltration plate, secondary filtered water is pumped through the water return pump to conduct secondary wet type filtration on gas, the purification degree is improved, sediment can be cleaned through the rotary air cylinder, stable operation of equipment is kept, and manual maintenance is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery recycling, and in particular to a dust removal device used in a lithium battery recycling defluorination process. Background Art

[0002] With the rapid development of electric vehicles and renewable energy storage systems, the use of lithium batteries has increased dramatically, and the amount of waste lithium batteries generated has reached millions of tons. Waste lithium batteries contain valuable metals such as cobalt, lithium, copper, nickel, and resources such as plastics, and have high recycling value. If improperly disposed of, harmful substances such as lithium hexafluorophosphate and organic carbonate solvents contained in them will pose a serious threat to the environment and human health. Therefore, the recycling and treatment of waste lithium batteries has become a hot issue of global concern and is crucial to environmental protection and resource recycling.

[0003] In the lithium battery recycling and defluorination process, lithium batteries contain a large amount of metal elements, such as cobalt, lithium, copper, nickel, iron, etc. During the recycling and defluorination process, these metals may form metal dust or metal oxide dust, including cobalt powder, copper powder, lithium oxide, iron oxide, etc. Fluorine-containing compounds will damage the atmospheric ozone layer. For example, hydrogen fluoride will participate in a series of chemical reactions in the atmosphere, leading to ozone layer depletion. Hydrogen fluoride is highly corrosive and irritating. After inhalation by the human body, it will irritate the respiratory mucosa and cause symptoms such as coughing and difficulty breathing. In severe cases, it can cause pulmonary edema. Dust particles can enter the human body through the respiratory tract. Long-term exposure may cause lung diseases such as pneumoconiosis.

[0004] In conjunction with the above content, it should be noted that: Chinese patent application number CN2021215247159 discloses a lithium battery recycling pulse dust collector with a spray structure, which is powered on by a fan to blow out the gas in the outer cover to ensure air circulation in the outer cover, so that the toxic gas generated by cleaning the waste batteries will not accumulate in the outer cover, ensuring the environmental safety of the operator; However, the lithium battery recycling waste gas in the above-mentioned device is still not dust-removed in a sealed environment. The dust-containing waste gas directly sprayed over a short distance cannot meet the external discharge standards for the dust particles therein. In view of the above-mentioned technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a dust removal device used in the lithium battery recovery and defluorination process to solve the problems raised.

[0006] To achieve the above object, the present invention provides the following technical solution: a dust removal device used in a lithium battery recycling defluorination process, comprising a defluorination flue pipe, a wet outer cylinder is arranged at the bottom of the defluorination flue pipe, a rotating inner cylinder is arranged inside the wet outer cylinder, and a smoke exhaust elbow connected to the defluorination flue pipe is arranged at the top of the rotating inner cylinder and the wet outer cylinder; The inner wall of the wet outer cylinder is provided with multiple groups of return water spray rings facing the rotating inner cylinder, the bottom of the wet outer cylinder is provided with a support base sleeved with the rotating inner cylinder, and the top of the support base is provided with a slag discharge mechanism extending into the inner cavity at the bottom of the rotating inner cylinder; The slag discharge mechanism comprises a sealing seat and a hoop ring, and a water spray column extending to the top of the inner cavity of the rotating inner cylinder is arranged in the middle of the sealing seat.

[0007] Furthermore, the defluorination flue gas pipe and the smoke exhaust elbow are an integrated V-shaped pipe, a ring opening connected to the top of the wet outer cylinder is arranged at the bottom center of the defluorination flue gas pipe, and the bottom of the ring opening is sleeved on the top of the rotating inner cylinder, a ring sheet is arranged obliquely above the ring opening of the defluorination flue gas pipe to separate from the smoke exhaust elbow, and a connecting pipe connecting the wet outer cylinder and the rotating inner cylinder is arranged at the bottom of the smoke exhaust elbow.

[0008] Furthermore, a conical cover is provided on the top of the wet outer cylinder, a return water pump is provided on the outer wall of the bottom of the wet outer cylinder, a return water pipe inserted into the inside of the supporting base is provided at the output end of the return water pump, a branch pipe connected to a return water spray ring is provided on the top of the return water pipe, the return water spray ring has a conical structure, and a spray hole facing the rotating inner cylinder is provided on the bottom surface of the return water spray ring.

[0009] Furthermore, a booster pump is embedded in the center of the support base, a lower slag discharge port is arranged around the outer periphery of the booster pump, a secondary filter tank is recessed on the outer periphery of the top of the lower slag discharge port, a microfilter plate is inclined on the top of the secondary filter tank, a microfilter pipe connected to the bottom of the microfilter plate is inclined at the center of the top of the lower slag discharge port, and an upper slag discharge pipe connected to the top of the microfilter plate is arranged on the outer wall of the support base.

[0010] Furthermore, a sealing ring connected to the ring mouth is arranged above the rotating inner cylinder, a ring sleeved with the sealing ring is arranged on the top of the rotating inner cylinder, a rotating motor is arranged on the outer wall of the top of the ring, a gear ring meshing with the rotating motor is arranged on the outer wall of the top of the rotating inner cylinder, and a sealing ring is sleeved on the outer wall of the gear ring.

[0011] Furthermore, a plurality of disturbance air rings are sequentially arranged on the inner wall at the top of the rotating inner cylinder from top to bottom, and a plurality of conically arranged paddles are arranged on the inner wall of the disturbance air ring, a cone disk located below the disturbance air ring is arranged on the inner wall in the middle of the rotating inner cylinder, a twisting dial is arranged below the cone disk, and a filter port located between the twisting dial and the cone disk is arranged on the outer wall of the rotating inner cylinder.

[0012] Furthermore, an inner cone frame is arranged in a ring on the top of the sealing seat, an outer cone frame is slidably sleeved on the outside of the inner cone frame, a rotary cylinder sleeved with a hoop ring is provided on the top of the outer cone frame, a microfiltration mesh is embedded in the middle of the outer wall of the inner cone frame, and a channel that penetrates the sealing seat and connects to the microfiltration tube is provided at the bottom of the microfiltration mesh.

[0013] Furthermore, a connecting valve embedded in the supporting base is arranged at the bottom of the water spray column, and a plurality of one-way spray valves are arranged on the surface of the water spray column.

[0014] The beneficial effects of the present invention are: 1. The present invention drives the disturbance air ring, the cone disk and the twisted dial to rotate synchronously by rotating the inner cylinder, and the paddles of the disturbance air ring drive the exhaust gas to rotate, so that the paddles, the inner wall of the rotating inner cylinder, the sprayed water and the water spray column fully collide and contact, accelerate the fusion of the exhaust gas and the water, and can efficiently filter the dust-containing particles into the water, forming a multi-structure synergistic effect; the paddles between each group of disturbance air rings are staggered, so that the exhaust gas has different flow trajectories, and at the same time, the airflow pressure difference in the defluorination flue gas pipe is utilized, and under the intervention of the disturbance air ring, the exhaust gas at the same level and at different levels is accelerated to impact each other, avoiding local retention of the exhaust gas or too low flow rate, further improving the dust removal efficiency, optimizing the airflow path, and forming an efficient primary dust removal for the exhaust gas.

[0015] 2. The present invention forms accumulated water after the water mist generated by the water spray column fully contacts with the exhaust gas. The water level in the sedimentation area submerges the bottom of the cone disk. The filter material and the accumulated water at the bottom of the cone disk are irregular under the rotation of the cone disk and the twisted dial and the flushing of the water spray column. The filter material at the bottom of the cone disk can be continuously flushed, cleaned and intermittently exposed. After the exhaust gas is filtered through this area, some dust-containing particles are intercepted to obtain primary filtered gas and water, realizing the separation of primary filtration and sedimentation, and the sedimentation area is designed; the primary filtered water flows into the secondary filter tank along the outer wall of the rotating inner cylinder, and is filtered twice by the microfiltration plate to separate impurities to obtain secondary filtered water and filter residue water, thereby further purifying the water quality, reducing the burden of subsequent treatment, and improving the water quality through secondary filtration.

[0016] 3. The present invention is that when the primary filtered gas flows upward, the return water pump draws the secondary filtered water under the microfiltration plate, and at the same time, the outer wall of the rotating inner cylinder is cleaned by the return water spray ring, and the primary filtered gas is subjected to secondary wet filtration to sublimate it into secondary filtered gas, thereby further improving the degree of gas purification, and the cyclic filtration improves the gas purity; the outer cone frame is driven to rotate by the rotary cylinder to realize the drainage and discharge of the sediment at the bottom of the sedimentation area, and the outer cone frame is reset after the discharge, and the microfiltration embedded net of the inner cone frame is exposed, and the accumulated water in the sedimentation area is continuously guided by microfiltration, thereby ensuring the stable operation of the equipment, reducing the frequency and intensity of manual maintenance, and the equipment is self-cleaning and maintained, so as to realize the integrated treatment of dust-containing exhaust gas by the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural stereogram of the defluorination flue gas pipe and the flue gas exhaust elbow of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the overall internal cross-sectional structure of the present invention; Figure 4 It is a structural schematic diagram of the wet outer cylinder of the present invention; Figure 5 It is a schematic diagram of the internal structure of the wet-out cylinder of the present invention; Figure 6 It is a structural schematic diagram of the rotating inner cylinder of the present invention; Figure 7 It is a structural schematic diagram of the sleeve ring of the present invention; Figure 8 It is a structural schematic diagram of the twisting dial of the present invention; Fig. 9 It is a structural schematic diagram of the slag discharge mechanism of the present invention; Fig.10 It is a schematic diagram of the structure of the water spray column of the present invention; Fig.11 It is a structural schematic diagram of the sealing seat of the present invention.

[0019] Figure numerals: 1. defluorination flue gas pipe; 2. wet outer cylinder; 201. conical cover; 202. return water spray ring; 203. return water pipe; 204. return water pump; 3. rotating inner cylinder; 301. rotating motor; 302. sleeve ring; 303. disturbance air ring; 304. cone disk; 305. filter port; 306. twisting dial; 307. sealing sleeve; 308. gear ring; 4. water spray column; 401. connecting valve; 5. slag discharge mechanism; 501. sealing seat; 502. hoop ring; 503. inner cone frame; 504. outer cone frame; 505. rotary cylinder; 6. supporting base; 601. upper slag discharge pipe; 602. lower slag discharge port; 603. booster pump; 7. exhaust elbow; 701. connecting pipe. DETAILED DESCRIPTION

[0020] 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.

[0021] Example 1: Please refer to Figure 1 - Fig.11 As shown, this embodiment is a dust removal device used in the lithium battery recycling defluorination process, including a defluorination flue pipe 1, a wet outer cylinder 2 is arranged at the bottom of the defluorination flue pipe 1, a rotating inner cylinder 3 is arranged inside the wet outer cylinder 2, and a smoke exhaust elbow 7 connected to the defluorination flue pipe 1 is arranged at the top of the rotating inner cylinder 3 and the wet outer cylinder 2. Waste lithium batteries generate a certain amount of waste gas in the recycling defluorination treatment process, and the waste gas contains a large amount of dust-containing particles. These particles may contain battery material dust, metal oxide dust, etc. After being collected and concentrated, they are guided into the defluorination flue pipe 1 for dust removal.

[0022] The defluorination flue gas pipe 1 and the smoke exhaust elbow 7 are an integrated V-shaped pipe. A ring mouth connected to the top of the dehumidifying outer cylinder 2 is arranged at the bottom center of the defluorination flue gas pipe 1, and the bottom of the ring mouth is sleeved on the top of the rotating inner cylinder 3. A ring piece is arranged obliquely above the ring mouth of the defluorination flue gas pipe 1 to separate from the smoke exhaust elbow 7. A connecting pipe 701 connecting the dehumidifying outer cylinder 2 and the rotating inner cylinder 3 is arranged at the bottom of the smoke exhaust elbow 7. The first-level filtered gas enters the buffer cavity, and the connecting pipe 701 is connected to the smoke exhaust elbow 7 to form a pressure relief area, which prompts the first-level filtered gas to gather upward to the connecting pipe 701 and enter the smoke exhaust elbow 7 along the connecting pipe 701 to enter the next step.

[0023] A sealing ring connected to the ring mouth is arranged above the rotating inner cylinder 3, a ring 302 sleeved with the sealing ring is arranged on the top of the rotating inner cylinder 3, a rotating motor 301 is arranged on the top outer wall of the ring 302, a gear ring 308 meshing and transmitting with the rotating motor 301 is arranged on the top outer wall of the rotating inner cylinder 3, a sealing ring 307 is sleeved on the outer wall of the gear ring 308, the output end of the driving motor meshes and transmits with the gear ring 308 through a coupling and a gear, the gear ring 308 is sleeved on the top outer wall of the rotating inner cylinder 3, the bottom of the rotating inner cylinder 3 is sleeved on the top of the supporting base 6, and a sealing component is arranged at the connection between the rotating inner cylinder 3 and the supporting base 6, and the sealing component model is replaced according to actual needs.

[0024] The exhaust gas is guided along the bottom ring opening of the defluorination flue gas pipe 1 into the rotating inner cylinder 3. The rotating inner cylinder 3 is driven by the rotating motor 301 to rotate at a certain speed. Accordingly, the rotating inner cylinder 3 drives the disturbance air ring 303, the cone disk 304 and the twisting dial 306 to rotate synchronously. In this process, the disturbance air ring 303 drives the exhaust gas at different levels to rotate along the rotating inner cylinder 3 through a number of paddles, so as to promote the exhaust gas to fully collide and contact with the paddles, the inner wall of the rotating inner cylinder 3, the sprayed water and the water spray column 4, accelerate the fusion between the exhaust gas and the sprayed water, and filter the dust particles in the exhaust gas into the water. It should be noted that the paddles between each group of disturbance air rings 303 are arranged in a staggered combination, so that the exhaust gas produces different flow trajectories under the push of different paddles.

[0025] A plurality of groups of disturbance air rings 303 are sequentially arranged on the inner wall of the top of the rotating inner cylinder 3 from top to bottom, and a plurality of groups of conically arranged paddles are arranged on the inner wall of the disturbance air ring 303. Affected by the continuous injection of exhaust gas into the defluorination flue gas pipe 1, there are differences in the air flow pressures of multiple layers from top to bottom of the rotating inner cylinder 3. Under the active intervention of the disturbance air ring 303, the flow of exhaust gas at the same layer and the mutual contact and impact of exhaust gas at different layers are accelerated. Combined with the continuous input of exhaust gas pressure, the exhaust gas is prevented from being retained in a local area or the flow rate is too low.

[0026] A connecting valve 401 embedded in the supporting base 6 is arranged at the bottom of the water spray column 4, and a plurality of one-way spray valves are arranged on the surface of the water spray column 4. The water is continuously sprayed by the water spray column 4 and is lasered in the internal chamber of the rotating inner cylinder 3. The lasered water column contacts and collides with the inner wall of the rotating inner cylinder 3, the disturbance air ring 303 and other structures to generate exploding water mist. Under the pressure of continuous injection of exhaust gas, the exhaust gas is fully filtered by water and retained in the bottom area of ​​the rotating inner cylinder 3 to form accumulated water, which is marked as the sedimentation area.

[0027] A cone disk 304 located below the disturbance air ring 303 is arranged on the inner wall of the middle part of the rotating inner cylinder 3, a twisting dial 306 is arranged below the cone disk 304, and a filter port 305 located between the twisting dial 306 and the cone disk 304 is arranged on the outer wall of the rotating inner cylinder 3. The water level in the sedimentation area is maintained at the bottom area of ​​the cone disk 304 submerged. The bottom area of ​​the cone disk 304 is the filter material. The accumulated water generates active rotational power due to the rotation of the cone disk 304 and the twisting dial 306, and continuously and irregularly rotates and flows in the top area of ​​the sedimentation area. Combined with the falling and gathering scouring of the water continuously sprayed by the water spray column 4, and the influence of the water column directly ejected by the water spray column 4 near the cone disk 304, the water surface of the submerged area at the bottom of the cone disk 304 maintains irregular waves at all times, which is used to continuously scour, clean and intermittently expose the filter material to the bottom area of ​​the cone disk 304.

[0028] At the same time, affected by the pressure of the continuous injection of exhaust gas, the water surface in this area is extremely unstable, causing the exhaust gas to penetrate into the water surface gaps exposed along the filter material or the bottom of the cone disk 304, and then gather at the bottom edge of the cone disk 304, and leak out to the outside of the rotating inner cylinder 3 along the filter port 305. It should be noted that part of the exhaust gas is dissolved in the accumulated water under pressure, and is filtered by the filter port 305, and the dust particles therein are filtered and initially intercepted to obtain primary filtered gas and primary filtered water, and the primary filtered gas and primary filtered water are guided to the buffer cavity between the rotating inner cylinder 3 and the wet outer cylinder 2, and the intercepted dust particles continue to precipitate in the accumulated water to obtain primary sediment.

[0029] A conical cover 201 is provided on the top of the wet outer cylinder 2, and a return water pump 204 is provided on the outer wall of the bottom of the wet outer cylinder 2. A return water pipe 203 inserted into the supporting base 6 is provided at the output end of the return water pump 204, and a branch pipe connected to a return water spray ring 202 is provided on the top of the return water pipe 203. The return water spray ring 202 has a conical structure, and a spray hole facing the rotating inner cylinder 3 is provided on the bottom surface of the return water spray ring 202.

[0030] Example 2: Please refer to Figure 1 - Figure 5 As shown, this embodiment is a dust removal device used in the lithium battery recovery defluorination process, including a plurality of return water spray rings 202 arranged on the inner wall of the wet outer cylinder 2 facing the rotating inner cylinder 3, a support base 6 sleeved with the rotating inner cylinder 3 is arranged at the bottom of the wet outer cylinder 2, and a slag discharge mechanism 5 extending to the inner cavity at the bottom of the rotating inner cylinder 3 is arranged on the top of the support base 6; the slag discharge mechanism 5 includes a sealing seat 501 and a hoop ring 502, and a water spray column 4 extending to the top of the inner cavity of the rotating inner cylinder 3 is arranged in the middle of the sealing seat 501.

[0031] When the primary filtered gas flows upward through the multiple groups of return water spray rings 202, the return water pump 204 extracts the secondary filtered water from under the microfilter plate, and the secondary filtered water enters the multiple groups of return water spray rings 202 along the return water pump 204, the return water pipe 203 and the branch pipe. The return water spray ring 202 guides the secondary filtered water to be obliquely sprayed from top to bottom on the outer wall of the rotating inner cylinder 3, so as to continuously clean the outer wall of the rotating inner cylinder 3 and perform secondary wet filtration treatment on the primary filtered gas passing through, so that the primary filtered gas passing through the multiple groups of return water spray rings 202 is sublimated into the secondary filtered gas.

[0032] A booster pump 603 is embedded in the center of the support base 6, and a lower slag discharge port 602 is arranged around the outer periphery of the booster pump 603. A secondary filter tank is recessed on the outer periphery of the top of the lower slag discharge port 602, and a microfilter plate is tiltedly mounted on the top of the secondary filter tank. A microfilter pipe connected to the bottom of the microfilter plate is tiltedly arranged at the center of the top of the lower slag discharge port 602. An upper slag discharge pipe 601 connected to the top of the microfilter plate is arranged on the outer wall of the support base 6. The primary filtered water flows down along the outer wall of the rotating inner cylinder 3 and is collected in the secondary filter tank. It is subjected to secondary filtration treatment by the microfilter plate to separate impurities in the primary filtered water again to obtain secondary filtered water and residue water. The residue water is discharged through the upper slag discharge pipe 601, and the secondary filtered water is collected in the area below the microfilter plate.

[0033] The booster pump 603 is connected to the external water source and the connecting valve 401 through a delivery pipe, which is used to guide the external water source into the water spray column 4. A number of one-way spray valves guide the water to be sprayed toward the inner wall of the rotating inner cylinder 3. The microfiltration tube is used to connect the microfiltration embedded net to continuously seep the accumulated water in the sedimentation area, maintain the water level in the sedimentation area and ensure the extraction demand of the return water pump 204. It should be noted that the external water source is prepared in advance according to the dust removal needs, and relevant agents can be added, but it is not limited to this.

[0034] An inner cone frame 503 is arranged in a ring on the top of the sealing seat 501, an outer cone frame 504 is slidably sleeved on the outside of the inner cone frame 503, a rotary cylinder 505 sleeved with the hoop 502 is arranged on the top of the outer cone frame 504, a microfiltration mesh is embedded in the middle of the outer wall of the inner cone frame 503, and a channel that penetrates the sealing seat 501 and connects to the microfiltration tube is arranged at the bottom of the microfiltration mesh.

[0035] The hoop ring 502 is sleeved on the outer wall at the bottom of the water spray column 4, and cooperates with the inner cone frame 503 and the sealing seat 501 to form a limiting support for the water spray column 4. When too much dust particles are deposited in the accumulated water in the sedimentation area, the rotary cylinder 505 drives the outer cone frame 504 to rotate at a certain angle, so that the cracks between the outer cone frames 504 are aligned with the cracks between the inner cone frames 503, so that the sediment at the bottom of the sedimentation area is drained, enters the lower slag discharge port 602, and enters the external container along the lower slag discharge port 602. The sediment is collected and processed. After waiting for the sediment to be cleaned, the rotary cylinder 505 carries the outer cone frame 504 to reset, so that the cracks of the outer cone frame 504 expose the microfiltration embedded net of the inner cone frame 503, which is used to continuously microfilter the accumulated water in the sedimentation area and guide it into the secondary filter tank.

[0036] In combination with Example 1 and Example 2, the present invention has great advantages in the defluorination of waste gas dust removal from waste lithium batteries. The rotating inner cylinder 3 drives the relevant components to rotate synchronously, so that the exhaust gas fully collides with the multiple structures, and cooperates with the misalignment of the paddles of the disturbance air ring 303 and the air flow pressure difference to achieve efficient primary dust removal.

[0037] Water mist is used to form accumulated water sediment, and the primary filtration and separation is achieved through the action of cone disk 304, and then the water quality is filtered for the second time by the microfiltration plate. The secondary filtered water is extracted by return pump 204 for the secondary wet filtration of the gas to improve the purification degree. The rotary cylinder 505 can also be used to clean the sediment and keep the equipment running stably, reducing manual maintenance.

[0038] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Related accessories include couplings, screws, gears, gaskets and other commonly used mechanical connection components in this field, but are not limited thereto. They are replaced and adapted according to actual use.

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dust removal device used in a lithium battery recycling and defluorination process, comprising a defluorination flue gas pipe (1), characterized in that: A wet outer cylinder (2) is arranged at the bottom of the defluorination flue gas pipe (1), a rotating inner cylinder (3) is arranged inside the wet outer cylinder (2), and a smoke exhaust elbow (7) connected to the defluorination flue gas pipe (1) is arranged at the top of the rotating inner cylinder (3) and the wet outer cylinder (2); The inner wall of the wet outer cylinder (2) is provided with a plurality of groups of return water spray rings (202) facing the rotating inner cylinder (3); the bottom of the wet outer cylinder (2) is provided with a support base (6) sleeved with the rotating inner cylinder (3); the top of the support base (6) is provided with a slag discharge mechanism (5) extending into the inner cavity at the bottom of the rotating inner cylinder (3); The slag discharge mechanism (5) comprises a sealing seat (501) and a hoop ring (502), and a water spray column (4) extending to the top of the inner cavity of the rotating inner cylinder (3) is provided in the middle of the sealing seat (501).

2. The dust removal device used in the lithium battery recovery and defluorination process according to claim 1, characterized in that: The defluorination flue gas pipe (1) and the exhaust bend pipe (7) are an integral V-shaped pipe. A ring opening connected to the top of the dehumidifying outer cylinder (2) is provided at the center of the bottom of the defluorination flue gas pipe (1), and the bottom of the ring opening is sleeved on the top of the rotating inner cylinder (3). A ring sheet is provided obliquely above the ring opening of the defluorination flue gas pipe (1) to separate the dehumidifying outer cylinder (2) from the exhaust bend pipe (7). A connecting pipe (701) connecting the dehumidifying outer cylinder (2) and the rotating inner cylinder (3) is provided at the bottom of the exhaust bend pipe (7).

3. The dust removal device used in the lithium battery recovery and defluorination process according to claim 1, characterized in that: A conical cover (201) is provided at the top of the wet outer cylinder (2), a return water pump (204) is provided on the outer wall of the bottom of the wet outer cylinder (2), a return water pipe (203) inserted into the interior of the support base (6) is provided at the output end of the return water pump (204), and a branch pipe connected to the return water spray ring (202) is provided at the top of the return water pipe (203).

4. The dust removal device used in the lithium battery recovery and defluorination process according to claim 1, characterized in that: A booster pump (603) is embedded in the center of the support base (6), a lower slag discharge port (602) is arranged around the outer periphery of the booster pump (603), a secondary filter tank is arranged in a recessed manner on the outer periphery of the top of the lower slag discharge port (602), a microfilter plate is arranged obliquely on the top of the secondary filter tank, a microfilter pipe connected to the bottom of the microfilter plate is arranged obliquely at the center of the top of the lower slag discharge port (602), and an upper slag discharge pipe (601) connected to the top of the microfilter plate is arranged on the outer wall of the support base (6).

5. The dust removal device used in the lithium battery recovery and defluorination process according to claim 2, characterized in that: A sealing ring connected to the ring mouth is arranged above the rotating inner cylinder (3); a sleeve ring (302) sleeved with the sealing ring is arranged at the top of the rotating inner cylinder (3); a rotating motor (301) is arranged on the top outer wall of the sleeve ring (302); a gear ring (308) meshing with the rotating motor (301) is arranged on the top outer wall of the rotating inner cylinder (3); and a sealing ring (307) is sleeved on the outer wall of the gear ring (308).

6. The dust removal device used in the lithium battery recovery and defluorination process according to claim 5, characterized in that: A plurality of groups of disturbance air rings (303) are arranged in sequence from top to bottom on the inner wall of the top of the rotating inner cylinder (3), and a plurality of groups of paddles arranged in a conical shape are arranged on the inner wall of the disturbance air ring (303). A cone disk (304) located below the disturbance air ring (303) is arranged on the inner wall of the middle part of the rotating inner cylinder (3), a twisting dial (306) is arranged below the cone disk (304), and a filter port (305) located between the twisting dial (306) and the cone disk (304) is arranged on the outer wall of the rotating inner cylinder (3).

7. The dust removal device used in the lithium battery recovery and defluorination process according to claim 1, characterized in that: An inner cone frame (503) is arranged in an annular pattern on the top of the sealing seat (501); an outer cone frame (504) is slidably sleeved on the outside of the inner cone frame (503); a rotary cylinder (505) sleeved on the hoop (502) is provided on the top of the outer cone frame (504); and a microfiltration mesh is embedded in the middle of the outer wall of the inner cone frame (503).

8. The dust removal device used in the lithium battery recovery and defluorination process according to claim 1, characterized in that: The bottom of the water spray column (4) is provided with a connecting valve (401) embedded in the interior of the supporting base (6), and the surface of the water spray column (4) is provided with a plurality of one-way spray valves.

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