Dust removal device applied to lithium battery recycling defluorination process

Abstract

The application discloses a dust removal device applied to a lithium battery recycling defluorination process, which comprises a defluorination flue gas pipe, a wet removal outer cylinder is arranged at the bottom of the defluorination flue gas pipe, a rotating inner cylinder is arranged in the wet removal outer cylinder, and a smoke exhaust elbow pipe connected with the defluorination flue gas pipe is arranged at the top of the rotating inner cylinder and the wet removal outer cylinder; the rotating inner cylinder drives the related components to rotate synchronously, so that the waste gas is fully impacted by the multiple structures, and the high-efficiency primary dust removal is realized in cooperation with the dislocation of the disturbance air ring and the air flow pressure difference; the water mist is used to form accumulated water to be deposited, the primary filtration separation is realized through the action of a conical disc and the like, the water quality is secondarily filtered by a microfiltration plate, the secondary wet filtration of the gas is carried out by using the secondary filtration water extracted by a backwater pump, the purification degree is improved, the sediment can be cleaned by the rotary air cylinder and the stable operation of the equipment can be maintained, and the manual maintenance is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the lithium battery recycling technical field, in particular to a dust removal device applied to a lithium battery recycling defluorination process. BACKGROUND

[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 has reached millions of tons. The waste lithium batteries contain valuable metals such as cobalt, lithium, copper and nickel, as well as plastic resources, and have high recycling value. If not properly disposed of, harmful substances such as lithium hexafluorophosphate and organic carbonate solvents contained therein can pose a serious threat to the environment and human health. Therefore, the recycling of waste lithium batteries has become a global focus, and is of great importance to environmental protection and resource recycling.

[0003] In the lithium battery recycling defluorination process, the lithium battery contains a large amount of metal elements such as cobalt, lithium, copper, nickel and iron. During the recycling defluorination process, these metals may form metal dust or metal oxide dust, and the cobalt powder, copper powder, lithium oxide and iron oxide contained therein may damage the atmospheric ozone layer. For example, hydrogen fluoride can participate in a series of chemical reactions in the atmosphere, causing ozone layer depletion. Hydrogen fluoride is highly corrosive and irritating. Inhaling it can irritate the respiratory mucosa, causing 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, and long-term exposure may cause lung diseases such as pneumoconiosis.

[0004] In combination with the above, it should be noted that the Chinese patent with the application number CN2021215247159 discloses a lithium battery recycling pulse dust collector with a spraying structure. The fan is powered on to blow the gas in the outer cover, ensuring air circulation in the outer cover, so that toxic gases generated by cleaning waste batteries do not accumulate in the outer cover, ensuring the environmental safety of the operator.

[0005] However, the lithium battery recycling exhaust gas in the above device is still not subjected to dust removal processing in a sealed environment. The dust-containing exhaust gas directly sprayed for a short distance cannot meet the discharge standard in terms of the spraying effect of the dust particles contained therein. In view of the above technical defects, the present solution is proposed. SUMMARY

[0006] The purpose of the present application is to provide a dust removal device applied to a lithium battery recycling defluorination process to solve the problems.

[0007] In order to achieve the above object, the application provides the following technical scheme: the dust removal device applied to the defluorination process of lithium battery recovery, comprising a defluorination flue gas pipe, a wet removal outer cylinder is arranged at the bottom of the defluorination flue gas pipe, a rotating inner cylinder is arranged in the wet removal outer cylinder, and a smoke exhaust elbow pipe connected with the defluorination flue gas pipe is arranged at the top of the wet removal outer cylinder and the rotating inner cylinder;

[0008] A plurality of water return spray rings facing the rotating inner cylinder are arranged on the inner wall of the wet removal outer cylinder, a support base sleeved with the rotating inner cylinder is arranged at the bottom of the wet removal outer cylinder, and a slag discharge mechanism extending into the inner cavity of the bottom of the rotating inner cylinder is arranged at the top of the support base.

[0009] The slag discharge mechanism comprises a sealing seat and a hoop, 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.

[0010] Further, the defluorination flue gas pipe and the smoke exhaust elbow pipe form a V-shaped integrated pipeline, a ring opening connected with the top of the wet removal outer cylinder is arranged at the center of the bottom of the defluorination flue gas pipe, the ring opening is sleeved at the top of the rotating inner cylinder, a ring piece separated from the smoke exhaust elbow pipe is arranged obliquely above the ring opening of the defluorination flue gas pipe, and a communication pipe communicating between the wet removal outer cylinder and the rotating inner cylinder is arranged at the bottom of the smoke exhaust elbow pipe.

[0011] Further, a conical cover is arranged at the top of the wet removal outer cylinder, a water return pump is arranged on the outer wall of the bottom of the wet removal outer cylinder, a water return pipeline inserted into the inside of the support base is arranged at the output end of the water return pump, a branch pipe connected with the water return spray ring is arranged at the top of the water return pipeline, the water return spray ring has a conical structure, and a spray hole facing the rotating inner cylinder is arranged on the bottom surface of the water return spray ring.

[0012] Further, a booster pump is embedded in the center of the inside of the support base, a lower slag discharge port is arranged around the outside of the booster pump, a secondary filter groove is recessed and arranged around the top of the lower slag discharge port, a microfiltration plate is obliquely arranged on the top of the secondary filter groove, a microfiltration pipe communicating below the microfiltration plate is obliquely arranged at the center of the top of the lower slag discharge port, and an upper slag discharge pipe communicating above the microfiltration plate is arranged on the outer wall of the support base.

[0013] Further, a sealing ring connected with the ring opening is arranged above the rotating inner cylinder, a sleeve ring sleeved with the sealing ring is arranged at the top of the rotating inner cylinder, a rotating motor is arranged on the outer wall of the top of the sleeve ring, a tooth ring engaged and driven with the rotating motor is arranged on the outer wall of the top of the rotating inner cylinder, and the sealing ring is sleeved with the tooth ring.

[0014] Further, a plurality of groups of disturbance air rings are sequentially arranged on the inner wall of the top of the rotating inner cylinder from top to bottom, and a plurality of groups of conical arranged stirring pieces are arranged on the inner wall of the disturbance air rings, a cone disc is arranged on the inner wall of the middle of the rotating inner cylinder below the disturbance air rings, a twisted stirring disc is arranged below the cone disc, and a filter port is arranged on the outer wall of the rotating inner cylinder between the twisted stirring disc and the cone disc.

[0015] Further, an inner cone frame is annularly arranged on the top of the sealing seat, an outer cone frame is slidably sleeved on the outer part of the inner cone frame, a rotary air cylinder is sleeved with the hoop ring on the top of the outer cone frame, a microfiltration embedded net is embedded in the middle of the outer wall of the inner cone frame, and a channel is arranged on the bottom of the microfiltration embedded net and penetrates through the sealing seat and connects the microfiltration pipe.

[0016] Further, a connecting valve embedded in the inside of the support base is arranged on the bottom of the water spraying column, and a plurality of one-way spray valves are arranged on the surface of the water spraying column.

[0017] The beneficial effects of the present application are:

[0018] 1. The present application is characterized in that the rotating inner cylinder drives the disturbance air rings, the cone disc and the twisted stirring disc to rotate synchronously, the stirring pieces of the disturbance air rings drive the waste gas to rotate, so that the waste gas is fully impacted and contacted with the stirring pieces, the inner wall of the rotating inner cylinder, the sprayed water and the water spraying column, the waste gas is accelerated to be combined with the water, the dust particles can be efficiently filtered into the water, and a multi-structure synergistic effect is formed.

[0019] 2. The water mist generated by the water spraying column fully contacts with the waste gas to form accumulated water, the water level of the sedimentation area submerges the bottom of the cone disc, the filter material at the bottom of the cone disc and the accumulated water are rotated under the cone disc and the twisted stirring disc, the water surface is irregular, the filter material at the bottom of the cone disc can be continuously washed and cleaned and intermittently exposed, part of the dust particles in the waste gas are intercepted after the waste gas passes through this area, a first filtered gas and water are obtained, the primary filtration and sedimentation separation are realized, and the sedimentation area is designed.

[0020] 3、The application is through the primary filtering gas flowing upward, the backwater pump extracts the secondary filtering water below the microfiltration plate, the secondary wet filtering is carried out to the primary filtering gas while the rotating inner cylinder outer wall is cleaned by the backwater spray ring, the primary filtering gas is sublimated into the secondary filtering gas, the gas purification degree is further improved, the gas purity is improved by circulating filtering, the outer cone frame is rotated by the rotary air cylinder, the drainage of the precipitate at the bottom of the precipitation area is realized, the outer cone frame is reset after being discharged, the microfiltration embedded net of the inner cone frame is exposed, the microfiltration of the accumulated water in the precipitation area is continuously guided, the stable operation of the equipment is ensured, the frequency and intensity of manual maintenance are reduced, the equipment is self-cleaning and maintenance, and the integrated treatment of the dust-containing waste gas by the device is realized. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, a brief introduction will be given to the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a structure perspective view of the defluorination flue gas pipe and the smoke exhaust elbow pipe of the present application.

[0023] Figure 2 It is a whole structure perspective view of the present application.

[0024] Figure 3 It is a whole internal section structure schematic view of the present application.

[0025] Figure 4 It is a structure schematic view of the wet removal outer cylinder of the present application.

[0026] Figure 5 It is an internal structure schematic view of the wet removal outer cylinder of the present application.

[0027] Figure 6 It is a structure schematic view of the rotating inner cylinder of the present application.

[0028] Figure 7 It is a structure schematic view of the sleeve ring of the present application.

[0029] Figure 8 It is a structure schematic view of the twist dial of the present application.

[0030] Figure 9 It is a structure schematic view of the slag discharge mechanism of the present application.

[0031] Figure 10 It is a structure schematic view of the water spray column of the present application.

[0032] Figure 11 It is a structure schematic view of the sealing seat of the present application.

[0033] Figure 1, defluorination flue gas pipe; 2, wet removal outer cylinder; 201, conical cover; 202, backwater spray ring; 203, backwater pipeline; 204, backwater pump; 3, rotating inner cylinder; 301, rotating motor; 302, collar; 303, disturbance air ring; 304, conical disc; 305, filter port; 306, twisted dial; 307, sealing sleeve; 308, tooth ring; 4, water spray column; 401, connecting valve; 5, slag discharge mechanism; 501, sealing seat; 502, hoop ring; 503, inner conical frame; 504, outer conical frame; 505, rotary air cylinder; 6, support base; 601, upper slag discharge pipe; 602, lower slag discharge port; 603, booster pump; 7, smoke exhaust elbow; 701, communication pipe. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Embodiment one: please refer to Figure 1 - Figure 11 As shown in the figure, the embodiment is a dust removal device applied to the defluorination process of lithium battery recycling, which comprises a defluorination flue gas pipe 1, the bottom of the defluorination flue gas pipe 1 is provided with a wet removal outer cylinder 2, the inside of the wet removal outer cylinder 2 is provided with a rotating inner cylinder 3, the rotating inner cylinder 3 and the top of the wet removal outer cylinder 2 are provided with a smoke exhaust elbow 7 connected with the defluorination flue gas pipe 1, a certain amount of waste gas is generated in the recycling defluorination treatment process of waste lithium batteries, and the waste gas contains a large amount of dust particles, which may contain battery material dust, metal oxide dust, etc. After being collected and guided into the defluorination flue gas pipe 1, the dust particles are treated.

[0036] The defluorination flue gas pipe 1 and the smoke exhaust elbow 7 are V-shaped integral pipes, the center of the bottom of the defluorination flue gas pipe 1 is provided with a ring opening connected with the top of the wet removal outer cylinder 2, and the ring opening is sleeved on the top of the rotating inner cylinder 3, the ring opening of the defluorination flue gas pipe 1 is provided with a ring piece separated from the smoke exhaust elbow 7, the bottom of the smoke exhaust elbow 7 is provided with a communication pipe 701 communicating between the wet removal outer cylinder 2 and the rotating inner cylinder 3, the first filtered gas enters the buffer cavity, the communication pipe 701 and the smoke exhaust elbow 7 form a pressure relief area, which promotes the first filtered gas to collect upward to the communication pipe 701, and enters the smoke exhaust elbow 7 along the communication pipe 701, for the next step.

[0037] A sealing ring connected with the ring mouth is arranged above the rotating inner cylinder 3, a sleeve ring 302 connected with the sealing ring is arranged at the top of the rotating inner cylinder 3, a rotating motor 301 is arranged on the outer wall of the top of the sleeve ring 302, a tooth ring 308 engaged with the rotating motor 301 is arranged on the outer wall of the rotating inner cylinder 3, a sealing ring 307 is sleeved on the outer wall of the tooth ring 308, the output end of the driving motor is engaged with the tooth ring 308 through a shaft coupling and a gear, the tooth ring 308 is sleeved on the outer wall of the top of the rotating inner cylinder 3, the bottom of the rotating inner cylinder 3 is sleeved on the top of the support base 6, and a sealing member is arranged at the connection between the rotating inner cylinder 3 and the support base 6. The type of the sealing member is replaced and matched according to actual needs.

[0038] The waste gas is guided into the rotating inner cylinder 3 through the ring mouth at the bottom of the defluorination flue gas pipe 1, 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 conical disc 304 and the twisted dial 306 to rotate synchronously. In this process, the disturbance air ring 303 drives the waste gas at different levels to make rotational motion in the rotating inner cylinder 3 through the plurality of pokers, so as to promote the waste gas to fully collide and contact with the pokers, the inner wall of the rotating inner cylinder 3, the sprayed water and the water spray column 4, accelerate the fusion between the waste gas and the sprayed water, and filter the dust particles in the waste gas into the water. It should be noted that the pokers between each group of disturbance air rings 303 are arranged in staggered combination, so that the waste gas produces different flow trajectories under the pushing of different pokers.

[0039] A plurality of disturbance air rings 303 are arranged on the inner wall of the top of the rotating inner cylinder 3 from top to bottom, and a plurality of groups of conical pokers are arranged on the inner wall of the disturbance air ring 303. Influenced by the continuous injection of waste gas in the defluorination flue gas pipe 1, there is a difference between the pressures of the multiple levels of air flow in the rotating inner cylinder 3 from top to bottom, and under the active intervention of the disturbance air ring 303, the flow of waste gas at the same level is accelerated, and the mutual contact and impact of waste gas between different levels is accelerated. Combined with the continuous input of waste gas pressure, the waste gas is prevented from staying or flowing too slowly in the local area.

[0040] The water spray column 4 is provided with a connection valve 401 embedded in the inside of the support base 6, and the surface of the water spray column 4 is provided with a plurality of one-way spray valves. The water spray column 4 continuously sprays water jets in the inner chamber of the rotating inner cylinder 3, the water jets contact and impact with the structures such as the inner wall of the rotating inner cylinder 3 and the disturbance air ring 303, and produce scattered water mist. Under the pressure of the continuous injection of waste gas, the waste gas is fully filtered by water, and stays in the bottom area of the rotating inner cylinder 3 to form accumulated water, which is marked as a sedimentation area.

[0041] A cone 304 is arranged on the inner wall of the middle part of the rotating inner cylinder 3 below the disturbance air ring 303, a twist dial 306 is arranged below the cone 304, a filter port 305 is arranged on the outer wall of the rotating inner cylinder 3 between the twist dial 306 and the cone 304, the water level in the precipitation area is kept submerged in the bottom area of the cone 304, the bottom area of the cone 304 is a filter material, the standing water is affected by the rotation of the cone 304 and the twist dial 306 to generate active rotating power, and the water in the top area of the precipitation area flows continuously and irregularly, combined with the continuous spraying of the water falling and gathering of the water column 4 and the influence of the water column 4 directly facing the jet near the cone 304 area, the water surface of the submerged area at the bottom of the cone 304 is kept irregularly at all times, which is used to continuously flush, clean and intermittently expose the filter material at the bottom area of the cone 304.

[0042] At the same time, affected by the continuous injection of waste gas pressure, the water surface in this area is extremely unstable, so that the waste gas penetrates into the gap between the filter material or the exposed water surface at the bottom of the cone 304, and then gathers at the edge of the bottom of the cone 304, and then leaks out of the filter port 305 to the outside of the rotating inner cylinder 3. It should be noted that part of the waste gas is dissolved in the standing water under pressure, and the filter port 305 filters it to preliminarily intercept the dust particles contained therein, to obtain a primary filtered gas and a primary filtered water, and guides the primary filtered gas and the primary filtered water to the buffer cavity between the rotating inner cylinder 3 and the wet removal outer cylinder 2, while the intercepted dust particles are continuously precipitated in the standing water to obtain a primary precipitate.

[0043] A conical cover 201 is arranged at the top of the wet removal outer cylinder 2, a backwater pump 204 is arranged on the outer wall of the bottom of the wet removal outer cylinder 2, a backwater pipeline 203 is arranged on the output end of the backwater pump 204 and inserted into the inside of the support base 6, a branch pipe is arranged on the top of the backwater pipeline 203 and connected with the backwater spray ring 202, the backwater spray ring 202 is in a conical structure, and the bottom surface of the backwater spray ring 202 is provided with a spray hole facing the rotating inner cylinder 3.

[0044] Embodiment two: please refer to Figure 1 - Figure 5 As shown in the figure, the embodiment is a dust removal device applied to the defluorination process of lithium battery recycling, which comprises a plurality of backwater spray rings 202 arranged on the inner wall of the wet removal outer cylinder 2 and facing the rotating inner cylinder 3, a support base 6 arranged at the bottom of the wet removal outer cylinder 2 and sleeved with the rotating inner cylinder 3, and a deslagging mechanism 5 arranged on the top of the support base 6 and extending into the inner cavity of the bottom of the rotating inner cylinder 3.

[0045] When the primary filtered gas flows upward through the area of the multiple sets of backwater spray rings 202, the backwater pump 204 draws the secondary filtered water below the microfiltration plate, and the secondary filtered water enters the multiple sets of backwater spray rings 202 along the backwater pump 204, the backwater pipeline 203, and the branch pipe. The backwater spray rings 202 guide the secondary filtered water to be obliquely sprayed on the outer wall of the rotating inner cylinder 3 from top to bottom, for continuously cleaning the outer wall of the rotating inner cylinder 3 and performing secondary wet filtration on the passing primary filtered gas, so that the primary filtered gas passing through the multiple sets of backwater spray rings 202 sublimates into secondary filtered gas.

[0046] The booster pump 603 is embedded in the center of the inside of the support base 6, and the lower slag outlet 602 is arranged around the outer periphery of the booster pump 603. The secondary filter groove is recessed on the top outer periphery of the lower slag outlet 602. The microfiltration plate is obliquely arranged on the top of the secondary filter groove. The microfiltration tube communicating with the lower side of the microfiltration plate is obliquely arranged on the top center of the lower slag outlet 602. The upper slag outlet pipe 601 communicating with the upper side of the microfiltration plate is arranged on the outer wall of the support base 6. The primary filtered water flows downward along the water flow of the outer wall of the rotating inner cylinder 3 and is collected in the secondary filter groove. The secondary filtration is performed on the primary filtered water by the microfiltration plate to separate the impurities in the primary filtered water again to obtain the secondary filtered water and the filter residue water. The filter residue water is guided to be discharged through the upper slag outlet pipe 601. The secondary filtered water is collected in the area below the microfiltration plate.

[0047] The booster pump 603 is connected with the external water source and the connection valve 401 through the delivery pipe, for guiding the external water source into the water spray column 4, and guiding the water to be sprayed to the inner wall of the rotating inner cylinder 3 by the plurality of one-way spray valves. The microfiltration tube is used to connect the microfiltration embedded net to continuously infiltrate the accumulated water in the sedimentation area, maintain the water level of the accumulated water in the sedimentation area, and ensure the extraction requirement of the backwater pump 204. It should be noted that the external water source is prepared in advance according to the dust removal requirement, and relevant agents can be added, which are not limited thereto.

[0048] The inner cone frame 503 is arranged in an annular manner on the top of the sealing seat 501. The outer cone frame 504 is slidably sleeved on the outside of the inner cone frame 503. The rotary cylinder 505 is arranged on the top of the outer cone frame 504 and is sleeved with the hoop 502. The microfiltration embedded net is embedded in the middle of the outer wall of the inner cone frame 503, and the channel penetrating through the sealing seat 501 and connecting the microfiltration tube is arranged on the bottom of the microfiltration embedded net.

[0049] The hoop ring 502 is sleeved on the outer wall of the water spray column 4 at the bottom, cooperates with the inner cone frame 503 and the sealing seat 501 to form a limiting support for the water spray column 4, and when dust particles in the accumulated water in the sedimentation area are too much, the outer cone frame 504 is rotated by a certain angle under the driving of the rotary air cylinder 505, so that the cracks between the outer cone frame 504 and the cracks between the inner cone frame 503 are aligned, and the sediment at the bottom of the sedimentation area is guided to enter the lower slag discharge port 602, and then enters the external container along the lower slag discharge port 602, and the sediment is collected and processed. After the sediment is cleaned, the rotary air cylinder 505 carries the outer cone frame 504 back to the original position, so that the cracks of the outer cone frame 504 expose the microfiltration mesh of the inner cone frame 503, and the accumulated water in the sedimentation area is continuously guided into the secondary filter tank.

[0050] In combination with Embodiment One and Embodiment Two, the present application has great advantages in dust removal of waste lithium battery defluorination waste gas. The rotary inner cylinder 3 drives the related parts to rotate synchronously, so that the waste gas collides with the multiple structures, and the dislocation of the disturbance air ring 303 and the air pressure difference are combined to realize efficient primary dust removal.

[0051] The water mist forms accumulated water and sediment, and the sediment is separated by the cone disc 304 and other components to realize primary filtration and separation. The secondary filtration of the water quality is realized by the microfiltration plate, the secondary wet filtration of the gas is realized by the secondary filtration water extracted by the water pump 204, the purification degree is improved, the sediment is cleaned by the rotary air cylinder 505, and the stable operation of the equipment is maintained, and the manual maintenance is reduced.

[0052] The above content is only an example and description of the structure of the present application. Those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as the modifications or supplements do not deviate from the structure of the present application or exceed the scope defined by the present application.

[0053] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and the relevant accessories include couplings, lead screws, gears, gaskets and other commonly used mechanical connecting components in the field, and are not limited thereto. The connecting mode is replaced and used according to the actual use.

[0054] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to provide the best illustration of the application and its practical application to those skilled in the art and to enable those skilled in the art to best utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A dust removal device used in the defluorination process of lithium battery recycling, comprising a defluorination flue gas pipe (1), characterized in that, The bottom of the defluorinated flue gas pipe (1) is provided with a wet exhaust cylinder (2), and the inside of the wet exhaust cylinder (2) is provided with a rotating inner cylinder (3). The top of the rotating inner cylinder (3) and the wet exhaust cylinder (2) is provided with an exhaust bend (7) connected to the defluorinated flue gas pipe (1). The inner wall of the wet outer cylinder (2) is provided with multiple sets 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) that is sleeved with the rotating inner cylinder (3). The top of the support base (6) is provided with a slag discharge mechanism (5) that extends into the bottom cavity of the rotating inner cylinder (3). The slag discharge mechanism (5) includes a sealing seat (501) and a hoop (502). A water jet (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). The defluorinated flue gas pipe (1) and the exhaust bend pipe (7) are integrated in a V-shape. The bottom center of the defluorinated flue gas pipe (1) is provided with an annular opening that connects to the top of the wet outer cylinder (2), and the bottom of the annular opening is fitted onto the top of the rotating inner cylinder (3). A ring plate that separates the defluorinated flue gas pipe (1) from the exhaust bend pipe (7) is provided diagonally above the annular opening. The bottom of the exhaust bend pipe (7) is provided with a connecting pipe (701) that connects the wet outer cylinder (2) and the rotating inner cylinder (3). The top of the wet outer cylinder (2) is provided with a conical cover (201), and a return water pump (204) is provided on the bottom outer wall of the wet outer cylinder (2). The output end of the return water pump (204) is provided with a return water pipe (203) inserted into the support base (6). The top of the return water pipe (203) is provided with a branch pipe connected to the return water spray ring (202). A sealing ring connected to the annular opening is provided above the rotating inner cylinder (3). A collar (302) that fits into the sealing ring is provided at the top of the rotating inner cylinder (3). A rotary motor (301) is provided on the outer wall of the top of the collar (302). A toothed ring (308) that meshes with the rotary motor (301) is provided on the outer wall of the top of the rotating inner cylinder (3). A sealing ring (307) is fitted on the outer wall of the toothed ring (308). The rotating inner cylinder (3) has multiple sets of disturbance air rings (303) arranged from top to bottom on the top inner wall, and several sets of conical paddles are arranged on the inner wall of the disturbance air rings (303). The rotating inner cylinder (3) has a cone disk (304) located below the disturbance air rings (303) on the middle inner wall, and a twisting paddle disk (306) is arranged below the cone disk (304). The rotating inner cylinder (3) has a filter port (305) located between the twisting paddle disk (306) and the cone disk (304) on the outer wall. The bottom of the water jet (4) is provided with a connecting valve (401) embedded in the support base (6), and the surface of the water jet (4) is provided with several one-way spray valves.

2. The dust removal device applied in the defluorination process of lithium battery recycling 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 recessed on the top outer periphery of the lower slag discharge port (602). A micro filter plate is inclinedly mounted on the top of the secondary filter tank. A micro filter tube communicating with the lower micro filter plate is inclinedly arranged at the center of the top of the lower slag discharge port (602). An upper slag discharge pipe (601) communicating with the upper micro filter plate is arranged on the outer wall of the support base (6).

3. The dust removal device applied in the defluorination process of lithium battery recycling according to claim 1, characterized in that, The sealing seat (501) has an inner cone frame (503) arranged in a ring at the top. An outer cone frame (504) is slidably sleeved on the outside of the inner cone frame (503). A rotary cylinder (505) that is sleeved with the hoop ring (502) is provided at the top of the outer cone frame (504). A micro-filter mesh is embedded in the middle of the outer wall of the inner cone frame (503).

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