Lithium ion battery negative electrode coating material granulation tail gas treatment system

Abstract

The invention discloses a lithium ion battery negative electrode coating material granulation tail gas treatment system, and relates to the technical field of tail gas treatment.A purification unit in equipment for treating tail gas generated by granulation operation in the prior art is optimized and improved, and a net-shaped belt body capable of moving according to needs is used as a container of activated carbon; waste gas is controlled to flow through and penetrate through the belt body in which activated carbon is stored so as to efficiently and conveniently finish adsorption treatment operation and guarantee the adsorption effect; meanwhile, the strip-shaped container is easier to take out and replace the activated carbon; the technical effects that when the lithium ion battery negative electrode coating material granulation tail gas treatment system treats tail gas, the utilization rate of the activated carbon is high, the tail gas treatment efficiency is relatively high, the process of replacing the activated carbon is convenient and rapid, and shutdown operation is not needed are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to a tail gas treatment system for granulating negative electrode coating materials of lithium ion batteries. Background Art

[0002] The negative electrode material of lithium-ion batteries is a key material in the production of lithium-ion batteries. Due to the natural defects in the structure of the negative electrode material of lithium-ion batteries, the negative electrode material needs to be coated to improve the rate performance and cycle performance of the negative electrode material, so that the negative electrode material can work better. However, the negative electrode coating material of lithium-ion batteries needs to be granulated during the production process, and the granulation work will produce polluting waste gas. These waste gases will pollute the environment if they are directly discharged, so the waste gas needs to be treated;

[0003] The waste gas treatment processes currently used are mostly to collect the waste gas, filter it, cool it down, pass it into activated carbon for adsorption, and then discharge the exhausted clean gas to complete the waste gas treatment; or use a catalytic combustion furnace to catalytically burn the waste gas before and after activated carbon adsorption to ensure that the emission meets the standards.

[0004] Existing equipment and systems for treating exhaust gas generated by granulation operations (for example, the lithium-ion battery negative electrode coating material granulation exhaust gas treatment system disclosed in application number 202323661870.7) are generally limited by their own structures and have the following problems: low utilization rate of activated carbon as an adsorption material, low exhaust gas treatment efficiency, cumbersome, time-consuming and labor-intensive process for activated carbon replacement, and the need for downtime operation. These problems are not conducive to the efficient treatment of exhaust gas generated by granulation operations.

[0005] Therefore, there is a need for a lithium-ion battery negative electrode coating material granulation exhaust gas treatment system with high activated carbon utilization, relatively high exhaust gas treatment efficiency, convenient and fast activated carbon replacement process and no need for shutdown operation. Summary of the invention

[0006] The embodiment of the present application provides a lithium-ion battery negative electrode coating material granulation exhaust gas treatment system, which solves the technical problems in the prior art that the equipment for treating the exhaust gas generated by the granulation operation has low utilization rate of activated carbon as an adsorption material, low exhaust gas treatment efficiency, and complicated activated carbon replacement process and requires shutdown operation due to its own structural limitations. The technical effects of the lithium-ion battery negative electrode coating material granulation exhaust gas treatment system being high in exhaust gas utilization rate, relatively high exhaust gas treatment efficiency, and convenient and fast activated carbon replacement process without shutdown operation are achieved.

[0007] The embodiment of the present application provides a lithium-ion battery negative electrode coating material granulation tail gas treatment system, including a collection unit, a pretreatment unit and a purification unit;

[0008] The purification unit includes a purification chamber assembly, a processing chamber assembly and a purification belt assembly; the purification chamber assembly includes a chamber body; the processing chamber assembly includes a receiving chamber body and a plurality of cylindrical guide wheels located inside the receiving chamber body, and the receiving chamber body is arranged close to the chamber body;

[0009] The purification belt assembly includes a top winch located near the top of the bin body, a first winch located near the top of the bin body and away from the bin body, a second winch located at the bottom of the bin body, and two basic belt bodies;

[0010] The two basic belt bodies pass through the bin body and the containing bin body, and are always in a stretched state. One end of each is wound and positioned on the top winch, and the other end is positioned on the first winch and the second winch respectively. The main body of the basic belt body is a mesh belt body, and a soft strip is provided on the edge. The two basic belt bodies are attached together in the bin body under the guidance of the cylindrical guide wheel to form a belt-shaped space containing activated carbon, and are separated in the containing bin body. The addition and removal of activated carbon on the basic belt bodies are completed in the containing bin body; the exhaust gas introduced into the bin body is discharged after passing through the two basic belt bodies in turn.

[0011] Furthermore, the purification chamber assembly includes a chamber body, an input pipe for conveying exhaust gas into the chamber body, a channel unit, and a plurality of near-wall guide wheels;

[0012] A through opening is provided on one side of the bin body close to the processing bin assembly;

[0013] The input pipe is connected with the outlet located in the bin body and the bottom of the channel unit located at the bottom;

[0014] There are multiple channel units, which are arranged in a row in the bin body, and the distance between two channel units is 2.1 to 2.4 times the thickness of the basic belt body;

[0015] The channel unit comprises a vertical channel tube and a positioning baffle; the vertical channel tube passes through and is fixed on the positioning baffle; the positioning baffle is a hard plate body arranged horizontally, and its edge is fixed on the inner wall of the warehouse body; the top of the channel unit located at the top is connected to the space outside the warehouse body, and the edges of its positioning baffle are closely attached to the inner wall of the warehouse body; there are long strip channels between the positioning baffles of other channel units and the inner wall of the warehouse body;

[0016] The near-wall guide wheel is a roller arranged transversely, and the end portion is rotatably connected to the inner wall of the bin body.

[0017] Furthermore, the processing chamber assembly includes a containing chamber body, a storage box, a material spreading assembly, a top guide wheel, a bottom guide wheel and a reversing guide wheel;

[0018] The side of the storage tank body close to the tank body is provided with an output port;

[0019] The storage box is a box body with an open top, which is placed inside the storage body and away from the storage body;

[0020] The material spreading assembly is used to evenly spread the activated carbon on the base belt body, is connected to the bin body containing the activated carbon, and has a material outlet at the bottom;

[0021] The top guide wheel and the bottom guide wheel are both rollers arranged transversely, and the ends are positioned on the inner wall of the accommodating bin body, and the two are arranged one above the other and close to the belt output port, and the basic belt body passes through the two;

[0022] The reversing guide wheel is a roller arranged transversely, which is located directly above the storage box and is at the same height as or lower than the bottom guide wheel.

[0023] Furthermore, the two basic belt bodies are respectively a first belt body and a second belt body. When in the accommodating chamber, the first belt body is on top; after the first belt body and the second belt body are stacked and combined, a combined belt body serving as a container is formed;

[0024] The paving assembly is spatially located between two base belt bodies located on the other side of the top guide wheel;

[0025] The second belt body between the reversing guide wheel and the top guide wheel is in a horizontal state or has an inclination angle of less than 5 degrees;

[0026] The combined belt body enters the warehouse body after passing through the belt output port and the entry port, and then passes through the gaps between each channel unit from bottom to top in sequence under the guidance of the near-wall guide wheel, and is finally wound on the top winch; the basic belt body in the warehouse body is in a bow shape.

[0027] Preferably, the basic belt body comprises a belt body, side assembly strips and spacer strips;

[0028] The belt body is a mesh belt body, the width of which is greater than the bottom diameter or the bottom circumscribed circle diameter of the vertical channel tube;

[0029] There are two side assembly strips, which are metal or non-metal soft strips, which are equal in length to the belt body and fixed to the two side edges of the belt body; the diameter of the circumscribed circle of the longitudinal section of the side assembly strip is greater than 4 cm; the side assembly strips are provided with long strip-shaped protrusions and grooves; when two basic belt bodies are closely stacked, the side assembly strips thereon fit into each other; due to the existence of the side assembly strips, a strip-shaped space with a thickness of greater than 3 cm is formed between the two basic belt bodies after they are stacked;

[0030] The spacers are metal or non-metal soft strips, there are multiple of them, fixed on the belt body, the length direction is the same as the width direction of the belt body, and the spacing between them is less than 15 cm.

[0031] Preferably, a jet cleaning assembly is provided in the storage box in the accommodating compartment and above the second belt body; the jet cleaning assembly is a high-pressure air gun for spraying air toward the base belt body to flush out the debris adhering thereto.

[0032] Preferably, the processing chamber assembly further comprises an oscillating assembly, which is a combination of a motor, a transmission shaft and a cam, and is located inside the containing chamber body and is arranged close to the base belt body, and oscillates and strikes the base belt body during operation.

[0033] Preferably, the purification chamber assembly comprises a chamber body, an inner processing tube, a fixing frame and an outer sleeve;

[0034] The inner treatment tube is a straight tube, fixed to the inner wall of the bin body by a fixing frame, and comprises a gas delivery section connected to the pretreatment unit, a gas permeable section connected to the gas delivery section, and an extension section with one end connected to the gas permeable section and the other end closed;

[0035] The outer sleeve is sleeved on the inner processing tube, the two are coaxial, and fixed on a fixing frame;

[0036] The outer sleeve comprises a guide tube and a ventilation tube; the guide tube is a trumpet-shaped tube body, located at both ends of the ventilation tube, and arranged symmetrically; the smaller end of the guide tube is fixed to the end of the ventilation tube; the ventilation tube is densely covered with through holes or has a grid structure;

[0037] The spacers on the belt body are arranged in a grid pattern;

[0038] The combined belt body penetrates into the gap between the inner processing tube and the outer casing, and is deformed into a tubular shape under the guidance of the outer casing to be sleeved on the inner processing tube.

[0039] Preferably, the spacing between the air permeable tube and the air permeable section is 1.1 to 1.3 times the thickness of the combined belt body.

[0040] Preferably, the belt body is composed of three sections, which are a connecting section, a cleaning section and a base section.

[0041] The cleaning section is located in the middle, and the connecting section is arranged close to the top winch; the connecting section plays a connecting role and is a mesh belt body;

[0042] The cleaning section is a belt body, which is densely covered with bristles;

[0043] The base section is a fine mesh belt body used to place activated carbon; when in use, the cleaning section is regularly controlled to enter the gap between the inner processing tube and the outer casing and move back and forth to brush off the debris accumulated thereon.

[0044] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0045] By optimizing and improving the purification unit in the equipment for treating the exhaust gas generated by the granulation operation in the prior art, a mesh belt body that can be moved as needed is used as a container for activated carbon, and the exhaust gas is controlled to flow through and penetrate the belt body storing the activated carbon to efficiently and conveniently complete the adsorption treatment operation and ensure the adsorption effect; at the same time, the belt-shaped container is easier to take out and replace the activated carbon; the technical problems of low utilization rate of activated carbon as an adsorption material, low exhaust gas treatment efficiency, and complicated activated carbon replacement process and need for shutdown operation caused by the equipment for treating the exhaust gas generated by the granulation operation in the prior art due to its own structure are effectively solved, thereby achieving the technical effects of high utilization rate of activated carbon when treating exhaust gas, relatively high exhaust gas treatment efficiency, and convenient and fast activated carbon replacement process without shutdown operation in the lithium ion battery negative electrode coating material granulation exhaust gas treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the overall structure of the tail gas treatment system for granulating the negative electrode coating material of a lithium-ion battery in this application;

[0047] Figure 2 This is a schematic diagram of the appearance structure of the purification unit;

[0048] Figure 3 Schematic diagram of the internal structure of the purification unit;

[0049] Figure 4 This is a schematic diagram of the internal structure of the purification unit;

[0050] Figure 5 A schematic diagram of the structure of the basic belt body;

[0051] Figure 6 A simplified structural diagram of the basic belt body;

[0052] Figure 7 It is a schematic diagram of the positional relationship between the fixed frame and the warehouse body;

[0053] Figure 8 It is a schematic diagram of the positional relationship between the inner processing tube, the outer sleeve and the purification belt assembly;

[0054] Fig. 9 It is a schematic diagram of the structure of the purification belt assembly;

[0055] Fig.10 It is a cross-sectional view of the inner processing tube, the outer sleeve and the purification belt assembly;

[0056] Fig.11 It is a schematic diagram of the layout relationship of the partitions on the belt body;

[0057] Fig.12 This is a simplified diagram of the structure of the basic belt body.

[0058] In the figure:

[0059] Collection unit 001, pretreatment unit 002, purification unit 003, catalytic combustion furnace 004, warehouse body 110, input pipe 120, vertical channel pipe 130, positioning partition 140, near-wall guide wheel 150, internal processing pipe 160, gas transmission section 161, air permeable section 162, extension section 163, fixing frame 170, guide pipe 181, air permeable pipe 182, accommodating warehouse body 210, storage box 220, paving assembly 230, jet cleaning assembly 240, oscillation assembly 250, top guide wheel 260, bottom guide wheel 270, reversing guide wheel 280, top winch 310, first winch 320, second winch 330, base belt body 340, side combination strip 341, partition strip 342, connecting section 350, cleaning section 360, base section 370. DETAILED DESCRIPTION

[0060] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0061] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0063] Embodiment 1

[0064] like Figure 1 As shown, the lithium-ion battery negative electrode coating material granulation tail gas treatment system of the present application includes a collection unit 001, a pretreatment unit 002 and a purification unit 003.

[0065] The collection unit 001 and the pretreatment unit 002 are both existing technologies, which are used for collecting waste gas and cooling and dust removal of waste gas respectively. The waste gas collected by the collection unit 001 is passed into the pretreatment unit 002 for cooling and dust removal, and then passed into the purification unit 003 for adsorption operation.

[0066] Furthermore, the pretreatment unit 002 includes a heat exchanger, and the heat exchanger is used to fully utilize the thermal energy of the exhaust gas.

[0067] like Figures 2 to 4 As shown, the purification unit 003 includes a purification chamber assembly, a processing chamber assembly and a purification belt assembly;

[0068] The purification chamber assembly includes a chamber body 110, an input pipe 120, a channel unit and a plurality of near-wall guide wheels 150;

[0069] The silo 110 is in the shape of a tower or a hollow rectangular block structure arranged longitudinally, and serves as a container; a side of the silo 110 close to the processing silo assembly is provided with a horizontally arranged long strip-shaped entry opening near the bottom for the base belt 340 to pass through;

[0070] The input pipe 120 is used to transport exhaust gas into the bin body 110, and penetrates into the bin body 110 from a side of the bin body 110 near the bottom, and the outlet located in the bin body 110 is connected to the bottom of the channel unit located at the bottom;

[0071] There are multiple channel units, which are arranged in a row in the warehouse body 110, and the distance between two channel units is 2.1 to 2.4 times the thickness of the basic belt body 340; the channel unit includes a vertical channel tube 130 and a positioning baffle 140; the vertical channel tube 130 is a hard tube body arranged longitudinally, which penetrates and is fixed on the positioning baffle 140; the positioning baffle 140 is a hard plate body arranged transversely, and the edge of which is fixed on the inner wall of the warehouse body 110; the top of the channel unit located at the top is connected to the space outside the warehouse body 110, and the edges of its positioning baffle 140 are close to the inner wall of the warehouse body 110 to prevent exhaust gas from flowing out from between the positioning baffle 140 and the inner wall of the warehouse body 110; there is a long strip channel between the positioning baffle 140 of other channel units (not the channel units located at the top) and the inner wall of the warehouse body 110 for the basic belt body 340 to pass through, and the width of the channel is close to the distance between the two channel units (the difference does not exceed 3 cm);

[0072] The near-wall guide wheel 150 is a roller arranged transversely, with its end rotatably connected to the inner wall of the warehouse body 110 , and the side wall is close to the inner wall of the warehouse body 110 , and is used to guide the movement of the base belt body 340 that penetrates the warehouse body 110 .

[0073] Preferably, there is no long strip channel for the basic belt body 340 to pass through between the positioning partition 140 of other channel units (not the channel unit located at the top) and the inner wall of the warehouse body 110; a long strip channel for the basic belt body 340 to pass through is provided on the positioning partition 140 of other channel units.

[0074] The processing chamber assembly includes a containing chamber body 210, a storage box 220, a material laying assembly 230, a top guide wheel 260, a bottom guide wheel 270 and a reversing guide wheel 280;

[0075] The storage bin 210 is a box structure, located on one side of the bin 110 and arranged close to the bin 110; the storage bin 210 is provided with a belt output port corresponding to the through port on one side close to the bin 110;

[0076] The storage box 220 is a box body with an opening at the top, which is placed inside the storage bin 210 and away from the bin 110, and is used to temporarily store the activated carbon that needs to be replaced; a take-in and put-out opening is provided at a position of the storage bin 210 near the storage box 220, and the take-in and put-out opening is used to take out and put in the storage box 220, and the take-in and put-out opening is equipped with a closed cover plate;

[0077] The material spreading assembly 230 is used to evenly spread the activated carbon on the base belt 340 (the activated carbon is input into the containing bin 210 and quantitatively output on the base belt 340 so that the activated carbon is evenly spread on the base belt 340, preferably an auger mechanism with a discharge port located at the bottom of the base belt 340), and is connected to the bin containing the activated carbon. The material spreading assembly 230 in the containing bin 210 is a horizontally arranged long strip, and the discharge port of the material spreading assembly 230 is located at the bottom; the material spreading assembly 230 is a prior art and will not be described in detail here;

[0078] The top guide wheel 260 and the bottom guide wheel 270 are both rollers arranged transversely, and the ends are positioned on the inner wall of the accommodating bin 210. The two are arranged one above the other and close to the belt output port, and the basic belt body 340 passes between the two.

[0079] The reversing guide wheel 280 is a roller arranged transversely, located directly above the storage box 220 and at the same height as or lower than the bottom guide wheel 270 , and is used to guide the moving direction of the base belt body 340 .

[0080] The purification belt assembly is in the shape of a belt as a whole and is used to store activated carbon, and includes a top hoist 310, a first hoist 320, a second hoist 330 and two basic belt bodies 340;

[0081] The top winch 310 is a winch structure, which is positioned on the inner side wall of the warehouse body 110 and is arranged close to the top of the warehouse body 110, and is used to reel in and release the base belt body 340;

[0082] The first hoist 320 is a hoist structure, which is positioned in the storage bin 210 near the bottom and located on a side of the storage box 220 near the bin 110;

[0083] The second hoist 330 is a hoist structure, which is positioned near the top of the storage bin 210 and directly above the storage box 220;

[0084] The two basic belt bodies 340 pass between the top guide wheel 260 and the bottom guide wheel 270 and are always in a straight state;

[0085] For the convenience of description, the two basic belt bodies 340 are defined as a first belt body and a second belt body respectively. When the first belt body is contained in the storage body 210, the first belt body is on the top. After the first belt body and the second belt body are stacked and combined, a combined belt body serving as a container is formed.

[0086] like Figure 4 and Figure 5 As shown, the parts of the two basic belt bodies 340 located on the side of the top guide wheel 260 close to the warehouse body 110 are closely attached to each other, and the two sections of the basic belt bodies 340 located on the other side of the top guide wheel 260 are separated from each other; the paving assembly 230 is spatially located between the two basic belt bodies 340 located on the other side of the top guide wheel 260;

[0087] The first belt body and the second belt body are of equal length, and one end of each belt body is fixed and wound around the top winch 310;

[0088] The other end of the first belt body is fixed and wound around the first hoist 320, and the other end of the second belt body is fixed and wound around the second hoist 330;

[0089] When the first belt body passes through the space between the top guide wheel 260 and the bottom guide wheel 270, it overlaps with the second belt body;

[0090] The second belt body passes around the reversing guide wheel 280 and then passes between the top guide wheel 260 and the bottom guide wheel 270;

[0091] The second belt body between the reversing guide wheel 280 and the top guide wheel 260 is in a horizontal state or has an inclination angle of less than 5 degrees;

[0092] The combined belt body enters the warehouse body 110 after passing through the belt output port and the entry port, and then passes through the gaps between each channel unit from bottom to top in sequence under the guidance of the near-wall guide wheel 150, and is finally wound around the top winch 310; the basic belt body 340 (combined belt body) in the warehouse body 110 is in a bow shape.

[0093] When the top winch 310 is retracted, the base belt body 340 moves toward the base belt body 340, and the spreading assembly 230 evenly spreads the activated carbon on the top of the second belt body; when the activated carbon needs to be replaced, the first winch 320 and the second winch 330 are retracted, and the top winch 310 is released, and the activated carbon on the second belt body falls into the storage box 220 under the influence of its own weight; the storage box 220 is taken out regularly, and the activated carbon in the storage box 220 is desorbed and reused.

[0094] like Figure 5 and Figure 6As shown, the basic belt body 340 includes a belt body, a side assembly strip 341 and a spacer strip 342;

[0095] The belt body is a mesh belt body, the width of which is greater than the bottom diameter or the bottom circumscribed circle diameter of the vertical channel tube 130;

[0096] There are two side assembly strips 341, which are metal or non-metal soft strips, which are equal in length to the belt body and fixed to the two side edges of the belt body; the diameter of the circumscribed circle of the longitudinal section of the side assembly strip 341 is greater than 4 cm; the side assembly strip 341 is provided with long strip-shaped protrusions and grooves; when two basic belt bodies 340 are closely stacked, the side assembly strips 341 thereon fit into each other; due to the existence of the side assembly strips 341, a strip-shaped space with a thickness of more than 3 cm is formed between the two basic belt bodies 340 after they are stacked;

[0097] The spacers 342 are metal or non-metal soft strips, there are multiple of them, fixed on the belt body, the length direction is the same as the width direction of the belt body, and the spacing between them is less than 15 cm; the existence of the spacers 342 makes it difficult for the activated carbon on the base belt body 340 to aggregate due to the spatial movement of the base belt body 340.

[0098] Furthermore, the mesh structure of the belt body also plays a certain filtering role in exhaust gas; a jet cleaning assembly 240 is provided at the position above the storage box 220 in the accommodating bin 210 and the second belt body; the jet cleaning assembly 240 is a high-pressure air gun, which is used to spray toward the base belt body 340 to flush down the debris adhering to it, which is a prior art and will not be described in detail here.

[0099] Furthermore, in order to accelerate the detachment of the activated carbon from the base belt body 340, the processing chamber assembly also includes an oscillation assembly 250, which is a combination of a motor, a transmission shaft and a cam, and is located inside the containing chamber 210, and is arranged close to the base belt body 340, and oscillates and hits the base belt body 340 during operation.

[0100] When the lithium-ion battery negative electrode coating material granulation tail gas treatment system of the embodiment of the present application is in operation:

[0101] The collection unit 001 first collects the waste gas (exhaust gas) and enters the pretreatment unit 002 for cooling and dust reduction treatment; then the waste gas enters the bin body 110 through the input pipe 120, flows through the channel unit and flows through the basic belt body 340 between the channel units for multiple times for adsorption treatment and finally discharged; the basic belt body 340 is regularly moved and replaced between the channel units according to the waste gas concentration; when the used activated carbon needs to be replaced, the basic belt body 340 is controlled to move toward the first winch 320 and the second winch 330, so that the used activated carbon falls into the storage box 220; then the basic belt body 340 is controlled to move toward the top winch 310, and at the same time the laying component 230 is controlled to lay new or desorbed activated carbon on the second belt body.

[0102] Furthermore, the lithium-ion battery negative electrode coating material granulation tail gas treatment system of the present application also includes a catalytic combustion furnace 004, and the adsorbed exhaust gas is introduced into the catalytic combustion furnace 004 to treat the combustibles in the exhaust gas and discharge it.

[0103] Preferably, after the exhaust gas is burned in the catalytic combustion furnace 004, it is introduced into the collection unit 001 again for adsorption and then discharged.

[0104] Preferably, the combustion treatment of the waste gas may occur before the adsorption of the waste gas.

[0105] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0106] The invention solves the technical problems in the prior art of the equipment for treating the exhaust gas generated by the granulation operation, such as the low utilization rate of activated carbon as the adsorption material, the low exhaust gas treatment efficiency, the complicated process of replacing the activated carbon and the need for shutdown operation, which are caused by the limitation of its own structure. The invention realizes the technical effect that the lithium-ion battery negative electrode coating material granulation exhaust gas treatment system has a high utilization rate of activated carbon when treating the exhaust gas, the exhaust gas treatment efficiency is relatively high, the activated carbon replacement process is convenient and fast, and there is no need for shutdown operation.

[0107] Embodiment 2

[0108] In order to further improve the utilization of activated carbon and the adequacy of waste gas treatment in the tail gas treatment system for granulating the negative electrode coating material of the lithium ion battery of the present application, the embodiment of the present application optimizes and improves the structure of the purification chamber assembly on the basis of the above embodiment, specifically:

[0109] like Figures 7 to 10 As shown, the purification chamber assembly includes a chamber body 110, an inner processing tube 160, a fixing frame 170 and an outer sleeve;

[0110] The warehouse body 110 is a box structure;

[0111] The inner processing tube 160 is a horizontally arranged hard round tube, fixed to the inner wall of the bin body 110 by a fixing frame 170, and includes a gas delivery section 161, a gas permeable section 162 and an extension section 163;

[0112] The gas transmission section 161 is longer than 40 cm and is connected to the pre-treatment unit 002 for transmitting waste gas;

[0113] The air permeable section 162 is a hard round tube with dense through holes or a hard round tube with a grid structure, one end of which is fixed to the end of the gas transmission section 161 and communicated with the gas transmission section 161;

[0114] The extension section 163 is longer than 40 cm, one end of which is fixed to the other end of the ventilating section 162 and communicated with the ventilating section 162, and the other end of which is closed;

[0115] The fixing frame 170 is a plate-shaped, rod-shaped and / or frame-shaped structure, fixed on the inner wall of the bin body 110, and serves to support the inner processing tube 160 and the outer sleeve;

[0116] The outer sleeve is sleeved on the inner processing tube 160, and the two are coaxial; the outer sleeve is fixed on the fixing frame 170;

[0117] The outer sleeve is longer than the air-permeable section 162 by more than 60 cm, and includes a guide tube 181 and an air-permeable tube 182; the guide tube 181 is a trumpet-shaped tube body, located at both ends of the air-permeable tube 182, and symmetrically arranged; the smaller end of the guide tube 181 is fixed to the end of the air-permeable tube 182; the air-permeable tube 182 is a hard round tube with dense through holes or a hard round tube with a grid structure;

[0118] The distance between the air permeable tube 182 and the air permeable section 162 is 1.1 to 1.3 times the thickness of the combined belt body.

[0119] like Fig.11 As shown, the partition bars 342 on the belt body are arranged in a grid shape, dividing the space between the two basic belt bodies 340 into a plurality of block spaces;

[0120] The combined belt body penetrates into the gap between the inner treatment tube 160 and the outer sleeve, and is deformed into a tubular shape under the guidance of the outer sleeve and is sleeved on the inner treatment tube 160; after the exhaust gas enters the inner treatment tube 160, it is discharged from the air permeable section 162, and is discharged from the air permeable tube 182 after passing through the basic belt body 340 and the activated carbon thereon.

[0121] Preferably, in order to facilitate maintenance and cleaning of the purification chamber components, Fig.12As shown, the belt body is composed of three sections, which are the connecting section 350, the cleaning section 360 and the base section 370; the cleaning section 360 is located in the middle, and the connecting section 350 is arranged close to the top winch 310; the connecting section 350 plays a connecting role and is a mesh belt body; the cleaning section 360 is a belt body, which is densely covered with bristles; the base section 370 is a fine mesh belt body, which is used to place activated carbon; when in use, the cleaning section 360 is regularly controlled to enter the gap between the inner treatment tube 160 and the outer sleeve and move back and forth to brush off the debris accumulated thereon.

[0122] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium-ion battery negative electrode coating material granulation tail gas treatment system, comprising a collection unit (001), a pretreatment unit (002) and a purification unit (003); characterized in that: The purification unit (003) comprises a purification chamber assembly, a processing chamber assembly and a purification belt assembly; the purification chamber assembly comprises a chamber body (110); the processing chamber assembly comprises a containing chamber body (210) and a plurality of cylindrical guide wheels located inside the containing chamber body (210), and the containing chamber body (210) is arranged close to the chamber body (110); The purification belt assembly comprises a top winch (310) located near the top of the silo (110), a first winch (320) located near the top of the accommodating silo (210) and away from the silo (110), a second winch (330) located at the bottom of the accommodating silo (210), and two basic belt bodies (340); The two basic belt bodies (340) penetrate the bin body (110) and the containing bin body (210), are always in a stretched state, and one end of each is wound and positioned on the top winch (310), and the other end is respectively positioned on the first winch (320) and the second winch (330); the main body of the basic belt body (340) is a mesh belt body, and a soft strip is provided on the edge; the two basic belt bodies (340) are attached together in the bin body (110) under the guidance of the columnar guide wheel to form a belt-shaped space containing activated carbon, and are separated in the containing bin body (210); the addition and removal of activated carbon on the basic belt bodies (340) are completed in the containing bin body (210); the exhaust gas introduced into the bin body (110) passes through the two basic belt bodies (340) in sequence and is discharged.

2. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 1, characterized in that: The purification chamber assembly comprises a chamber body (110), an input pipe (120) for conveying waste gas into the chamber body (110), a channel unit, and a plurality of near-wall guide wheels (150); A through opening is provided on one side of the bin body (110) close to the processing bin assembly; The input pipe (120) is connected to the outlet located in the bin body (110) and the bottom of the channel unit located at the bottom; There are a plurality of channel units, which are arranged in a row in the warehouse body (110), and the distance between two channel units is 2.1 to 2.4 times the thickness of the basic belt body (340); The channel unit comprises a vertical channel tube (130) and a positioning baffle (140); the vertical channel tube (130) passes through and is fixed on the positioning baffle (140); the positioning baffle (140) is a hard plate body arranged horizontally, and its edge is fixed on the inner wall of the warehouse body (110); the top of the channel unit located at the top is connected to the space outside the warehouse body (110), and the edge of its positioning baffle (140) is closely attached to the inner wall of the warehouse body (110); there is a long strip channel between the positioning baffle (140) of other channel units and the inner wall of the warehouse body (110); The near-wall guide wheel (150) is a roller arranged transversely, and its end is rotatably connected to the inner wall of the bin body (110).

3. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 1, characterized in that: The processing chamber assembly comprises a containing chamber body (210), a storage box (220), a material spreading assembly (230), a top guide wheel (260), a bottom guide wheel (270) and a reversing guide wheel (280); The receiving bin (210) is provided with an output port on one side close to the bin (110); The storage box (220) is a box body with an open top, which is placed inside the storage bin body (210) and is arranged away from the bin body (110); The material spreading assembly (230) is used to evenly spread the activated carbon on the base belt body (340), is connected to a bin body containing the activated carbon, and has a material discharge port located at the bottom; The top guide wheel (260) and the bottom guide wheel (270) are both rollers arranged transversely, and the ends are positioned on the inner wall of the accommodating bin (210). The two are arranged one above the other and close to the belt output port, and the basic belt body (340) passes between the two. The reversing guide wheel (280) is a roller arranged transversely, located directly above the storage box (220) and at the same height as or lower than the bottom guide wheel (270).

4. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 3, characterized in that: The two basic belt bodies (340) are respectively a first belt body and a second belt body. When contained in the storage chamber (210), the first belt body is on top. After the first belt body and the second belt body are stacked and combined, a combined belt body serving as a container is formed. The material laying assembly (230) is spatially located between two base belt bodies (340) located on the other side of the top guide wheel (260); The second belt body between the reversing guide wheel (280) and the top guide wheel (260) is in a horizontal state or has an inclination angle of less than 5 degrees; The combined belt body passes through the belt outlet and the entrance and enters the warehouse body (110), and then passes through the gaps between each channel unit from bottom to top in sequence under the guidance of the near-wall guide wheel (150), and finally winds around the top winch (310); the basic belt body (340) in the warehouse body (110) is in a bow shape.

5. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to any one of claims 1 to 4, characterized in that: The basic belt body (340) comprises a belt body, a side assembly strip (341) and a spacer strip (342); The belt body is a mesh belt body, the width of which is greater than the bottom diameter or the bottom circumscribed circle diameter of the vertical channel tube (130); The number of the side assembly strips (341) is two, which are metal or non-metal soft strips, which are the same length as the belt body and fixed on the two side edges of the belt body; the diameter of the circumscribed circle of the longitudinal section of the side assembly strip (341) is greater than 4 cm; the side assembly strip (341) is provided with long strip-shaped protrusions and grooves; when two basic belt bodies (340) are tightly stacked, the side assembly strips (341) thereon are mutually embedded; due to the existence of the side assembly strips (341), a strip-shaped space with a thickness greater than 3 cm is formed between the two basic belt bodies (340) after they are stacked; the spacer strips (342) are metal or non-metal soft strips, which are multiple in number and fixed on the belt body, and the length direction is the same as the width direction of the belt body, and the spacing between them is less than 15 cm.

6. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 1, characterized in that: A jet cleaning assembly (240) is provided at a position above the storage box (220) and the second belt body in the storage bin (210); the jet cleaning assembly (240) is a high-pressure air gun used to spray air toward the base belt body (340) to wash away the debris adhering thereto.

7. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 1, characterized in that: The processing chamber assembly further comprises an oscillating assembly (250), which is a combination of a motor, a transmission shaft and a cam, and is located inside the containing chamber body (210), and is arranged close to the base belt body (340), and oscillates and strikes the base belt body (340) during operation.

8. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 1, characterized in that: The purification chamber assembly comprises a chamber body (110), an inner processing tube (160), a fixing frame (170) and an outer sleeve; The inner processing tube (160) is a straight tube, fixed to the inner wall of the bin body (110) through a fixing frame (170), and comprises an air delivery section (161) connected to the pre-processing unit (002), an air permeable section (162) connected to the air delivery section (161), and an extension section (163) with one end connected to the air permeable section (162) and the other end closed; The outer sleeve is sleeved on the inner processing tube (160), the two are coaxial, and are fixed on a fixing frame (170); The outer sleeve comprises a guide tube (181) and a ventilation tube (182); the guide tube (181) is a trumpet-shaped tube body, located at both ends of the ventilation tube (182) and symmetrically arranged; the smaller end of the guide tube (181) is fixed to the end of the ventilation tube (182); the ventilation tube (182) is densely covered with through holes or has a grid structure; The spacers (342) on the belt body are arranged in a grid shape; The combined belt body penetrates into the gap between the inner processing tube (160) and the outer casing, and is deformed into a tubular shape under the guidance of the outer casing to be sleeved on the inner processing tube (160).

9. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 8, characterized in that: The distance between the air permeable tube (182) and the air permeable section (162) is 1.1 to 1.3 times the thickness of the combined belt body.

10. The lithium-ion battery negative electrode coating material granulation tail gas treatment system according to claim 8, characterized in that: The belt body is composed of three sections spliced ​​together, the three sections are a connecting section (350), a cleaning section (360) and a base section (370); The cleaning section (360) is located in the middle, and the connecting section (350) is arranged close to the top winch (310); the connecting section (350) plays a connecting role and is a mesh belt body; The cleaning section (360) is a belt body, on which bristles are densely covered; The base section (370) is a fine mesh belt body used to place activated carbon; when in use, the cleaning section (360) is regularly controlled to enter the gap between the inner processing tube (160) and the outer sleeve and move back and forth to brush off the debris accumulated thereon.

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