A granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery

Abstract

The present application discloses a granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery, which relates to the technical field of tail gas treatment. In this application, the purification unit in the equipment for treating the tail gas generated during granulation operations in the prior art is optimized and improved. A mesh belt that can be moved as needed is used as a container for activated carbon, and the waste gas is controlled to flow through and penetrate the belt storing the activated carbon to efficiently and conveniently complete the adsorption treatment operation and ensure the adsorption effect. At the same time, the strip-shaped container is easier to take out and replace the activated carbon; it realizes the technical effects of high utilization rate of activated carbon, relatively high treatment efficiency for tail gas, convenient and fast process for replacing activated carbon, and no need for shutdown operation when the granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery treats tail gas.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment, and particularly to a granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery. Background Art

[0002] The negative electrode material of a lithium-ion battery is a key material in the production of lithium-ion batteries. Due to natural defects in its own structure, the negative electrode material of a lithium-ion battery 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, during the production and manufacturing process of the negative electrode coating material of a lithium-ion battery, granulation work needs to be carried out, and the granulation work will generate polluting waste gas. The direct emission of these waste gases will pollute the environment, so the waste gas needs to be treated;

[0003] Currently, the waste gas treatment processes used mostly collect and filter and cool the waste gas and then pass it into activated carbon for adsorption, and then discharge the discharged clean gas to complete the treatment of the waste gas; or use a catalytic combustion furnace to catalytically combust the waste gas before and after the activated carbon adsorption to ensure up-to-standard discharge.

[0004] Existing equipment and systems for treating the tail gas generated by granulation operations (such as the granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery disclosed in Application No. 202323661870.7) generally have problems such as low utilization rate of activated carbon as an adsorption material, low treatment efficiency for tail gas, cumbersome and time-consuming process for replacing activated carbon, and the need for shutdown operations due to their own structural limitations, which is not conducive to the efficient treatment of the tail gas generated by granulation operations.

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

[0006] By providing a granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery in the embodiments of the present application, the technical problems in the prior art that the equipment for treating the tail gas generated by granulation operations has low utilization rate of activated carbon as an adsorption material, low treatment efficiency for tail gas, cumbersome process for replacing activated carbon, and the need for shutdown operations due to its own structural limitations are solved, and the technical effects that the granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery has a high utilization rate of activated carbon, relatively high treatment efficiency for tail gas, convenient and fast process for replacing activated carbon, and no need for shutdown operations when treating tail gas are achieved.

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

[0008] The purification unit includes a purification bin assembly, a treatment bin assembly, and a purification belt assembly; the purification bin assembly includes a bin body; the treatment bin assembly includes a receiving bin body and a plurality of cylindrical guide wheels located inside the receiving bin body, and the receiving bin body is disposed closely against the bin body;

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

[0010] The two base belt bodies penetrate through the bin body and the receiving bin body, and are always in a straightened state. One end of each is wound and positioned on the top winch, and the other ends are respectively positioned on the first winch and the second winch; the main body of the base belt body is a mesh belt body, and soft strips are provided at the edges; the two base belt bodies are guided by the cylindrical guide wheels to fit together inside the bin body to form a strip-shaped space filled with activated carbon, and are separated inside the receiving bin body; the operation of adding and removing the activated carbon on the base belt body is completed inside the receiving bin body; the tail gas introduced into the bin body is discharged after passing through the two base belt bodies in sequence.

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

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

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

[0014] The number of the channel units is multiple, and they are arranged in a row inside the bin body. The distance between two adjacent channel units is 2.1 to 2.4 times the thickness of the base belt body;

[0015] The channel unit includes a vertical channel pipe and a positioning partition; the vertical channel pipe penetrates through and is fixed on the positioning partition; the positioning partition is a hard plate body arranged horizontally, and its edge is fixed on the inner wall of the bin body; the top of the channel unit located at the topmost is communicated with the space outside the bin body, and the edges of its positioning partition are all closely attached to the inner side wall of the bin body; there are long strip-shaped channels between the positioning partitions of other channel units and the inner side wall of the bin body;

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

[0017] Further, the treatment bin assembly includes a receiving bin body, a storage box, a feeding component, a top guide wheel, a bottom guide wheel, and a reversing guide wheel;

[0018] A belt output port is provided on one side of the receiving bin body close to the bin body;

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

[0020] The material spreading component is used to evenly distribute activated carbon on the base belt body, communicates with the bin body for storing activated carbon, and the discharge port is located at the bottom;

[0021] Both the top guide wheel and the bottom guide wheel are rollers arranged horizontally, with their ends positioned on the inner wall of the accommodation bin body. The two are arranged one above the other and are close to the belt output port, and the base belt body passes between them;

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

[0023] Further, the two base belt bodies are respectively the first belt body and the second belt body. When inside the accommodation bin body, 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;

[0024] The material spreading component is spatially between the two base belt bodies 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 less than 5 degrees;

[0026] The combined belt body passes through the belt output port and the penetration port and then enters the bin body, and then passes through the gaps between each channel unit from bottom to top under the guidance of the near-wall guide wheel, and finally winds around the top winch; the base belt body in the bin body is in a bow shape.

[0027] Preferably, the base belt body includes a belt main body, side combination strips and partition strips;

[0028] The belt main body is a mesh belt body, and its width is greater than the bottom diameter or the bottom circumscribed circle diameter of the vertical channel pipe;

[0029] The number of the side combination strips is two, which are metal or non-metal soft strips, are of the same length as the belt main body and are fixed on the two side edges of the belt main body; the circumscribed circle diameter of the longitudinal section of the side combination strip is greater than 4 cm; long strip-shaped protrusions and grooves are provided on the side combination strip; when the two base belt bodies are closely stacked, the side combination strips on them are mutually engaged; due to the existence of the side combination strips, a belt-shaped space with a thickness greater than 3 cm is formed between the two base belt bodies after stacking;

[0030] The partition strips are metal or non-metal soft strips, the number of them is multiple, they are fixed on the belt main body, the length direction is the same as the width direction of the belt main body, and the distance between each other is less than 15 cm.

[0031] Preferably, a jet cleaning assembly is provided at a position above the storage box and the second belt body in the accommodation cavity; the jet cleaning assembly is a high-pressure air gun, which is used to jet air towards the base belt body to wash off the adhered sundries thereon.

[0032] Preferably, the processing chamber assembly further includes a vibration assembly, which is a combination of a motor, a transmission shaft and a cam, located inside the accommodation cavity, arranged close to the base belt body, and vibrates and strikes the base belt body during operation.

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

[0034] The inner processing pipe is a straight pipe, fixed on the inner wall of the chamber body through a fixing frame, and includes a gas transmission section communicated with the pretreatment unit, a breathable section communicated with the gas transmission section, and an extension section with one end communicated with the breathable section and the other end closed;

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

[0036] The outer sleeve pipe includes a guiding pipe and a breathable pipe; the guiding pipe is a trumpet-shaped pipe body, located at both ends of the breathable pipe and symmetrically arranged; the smaller end of the guiding pipe is fixed at the end of the breathable pipe; the breathable pipe is densely provided with through holes or is a grid structure;

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

[0038] The combined belt body is inserted into the gap between the inner processing pipe and the outer sleeve pipe, and is deformed into a tubular shape under the guidance of the outer sleeve pipe and sleeved on the inner processing pipe.

[0039] Preferably, the distance between the breathable pipe and the breathable 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 spliced together, namely a connection section, a cleaning section and a base section;

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

[0042] The cleaning section is a belt body, on which bristles are densely arranged;

[0043] The base section is a fine mesh belt body for placing activated carbon; during use, the cleaning section is periodically controlled to enter the gap between the inner processing pipe and the outer sleeve pipe and move back and forth to brush off the accumulated sundries 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 tail gas generated in the granulation operation in the prior art, using a mesh belt body that can move as needed as the container for activated carbon, controlling the waste gas 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; meanwhile, the strip-shaped container is easier to take out and replace the activated carbon; effectively solving the technical problems in the prior art that the equipment for treating the tail gas generated in the granulation operation has a low utilization rate of activated carbon as the adsorption material, low treatment efficiency for the tail gas, and a cumbersome process and requires shutdown operation when replacing the activated carbon, and thus achieving the technical effects of high utilization rate of activated carbon, relatively high treatment efficiency for the tail gas, convenient and fast process when replacing the activated carbon and no need for shutdown operation in the lithium-ion battery negative electrode coating material granulation tail gas treatment system when treating the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0047] Figure 2 It is a schematic diagram of the external structure of the purification unit;

[0048] Figure 3 It is a schematic diagram of the internal structure of the purification unit;

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

[0050] Figure 5 It is a schematic diagram of the structure of the base belt body;

[0051] Figure 6 It is a simplified schematic diagram of the structure of the base belt body;

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

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

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

[0055] Figure 10 It is a cross-sectional view of the inner treatment pipe, the outer sleeve pipe and the purification belt assembly;

[0056] Figure 11 It is a schematic diagram of the layout relationship of the partition strips on the belt main body;

[0057] Figure 12 It is a simplified schematic diagram of the structure of the base belt body.

[0058] In the figure:

[0059] Collection unit 001, pretreatment unit 002, purification unit 003, catalytic combustion furnace 004, bin body 110, input pipe 120, vertical channel pipe 130, positioning partition 140, near-wall guide wheel 150, internal treatment pipe 160, gas transmission section 161, breathable section 162, extension section 163, fixing frame 170, guiding pipe 181, breathable pipe 182, accommodation bin body 210, storage box 220, paving component 230, jet cleaning component 240, oscillation component 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, connection section 350, cleaning section 360, base section 370. Specific embodiments

[0060] For ease of understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the preferred embodiments of the present invention are shown in the drawings, however, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0061] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiments.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs; the terms used in the specification of the present invention herein 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 of the related listed items.

[0063] Embodiment 1

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

[0065] Both the collection unit 001 and the pretreatment unit 002 are prior arts, respectively used for the collection of waste gas and the cooling and dust removal operations of waste gas. The waste gas collected by the collection unit 001 is introduced into the pretreatment unit 002 for cooling and dust removal, and then introduced 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 make full use of the heat energy of the tail gas.

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

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

[0069] The bin body 110 is generally in a tower shape or a longitudinally arranged hollow rectangular block structure, serving as a container; on the side of the bin body 110 close to the treatment bin assembly, a horizontally arranged long strip-shaped entrance for the base belt 340 to pass through is provided near the bottom;

[0070] The input pipe 120 is used to convey waste gas into the bin body 110, penetrating into the bin body 110 from a position near the bottom on one side of the bin body 110, and the outlet inside the bin body 110 is communicated with the bottom of the channel unit at the bottommost part;

[0071] The number of the channel units is multiple, arranged in a column inside the bin body 110, and the distance between two channel units is 2.1 to 2.4 times the thickness of the base belt 340; the channel unit includes a vertical channel pipe 130 and a positioning partition 140; the vertical channel pipe 130 is a longitudinally arranged rigid pipe body, penetrating and fixed on the positioning partition 140; the positioning partition 140 is a horizontally arranged rigid plate body, with its edge fixed on the inner wall of the bin body 110; the top of the channel unit at the topmost part is communicated with the space outside the bin body 110, and the edges of its positioning partition 140 are closely attached to the inner side wall of the bin body 110 to prevent waste gas from flowing out between the positioning partition 140 and the inner wall of the bin body 110; there is a long strip-shaped channel for the base belt 340 to pass through between the positioning partition 140 of other channel units (non-topmost channel units) and the inner side wall of the bin body 110, and the width of this channel is similar to the distance between two channel units (the difference does not exceed 3 cm);

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

[0073] Preferably, there is no long strip-shaped channel for the base belt 340 to pass through between the positioning partition 140 of other channel units (non-topmost channel units) and the inner side wall of the bin body 110; a long strip-shaped channel for the base belt 340 to pass through is provided on the positioning partition 140 of other channel units.

[0074] The treatment bin assembly includes a receiving bin body 210, a storage box 220, a feeding assembly 230, a top guide wheel 260, a bottom guide wheel 270, and a reversing guide wheel 280;

[0075] The accommodating bin body 210 is of a box structure, located on one side of the bin body 110 and closely attached to the bin body 110; on the side of the accommodating bin body 210 close to the bin body 110, there is an output port corresponding to the penetration port.

[0076] The storage box 220 is a box body with an open top, placed inside the accommodating bin body 210 and set away from the bin body 110, for temporarily storing the activated carbon to be replaced; at the position of the accommodating bin body 210 close to the storage box 220, there is a pick-up and placement port, which is used for taking out and putting in the storage box 220, and the pick-up and placement port is equipped with a closing cover plate.

[0077] The material spreading assembly 230 is used for evenly spreading activated carbon on the base belt body 340 (inputting the activated carbon into the accommodating bin body 210 and quantitatively outputting it on the base belt body 340 so that the activated carbon is evenly sprinkled on the base belt body 340, preferably a screw mechanism with the discharge port at its bottom), and is communicated with the bin body containing the activated carbon. The material spreading assembly 230 in the accommodating bin body 210 is in a long strip shape arranged horizontally, and the discharge port of the material spreading assembly 230 is at the bottom; the material spreading assembly 230 is a prior art and will not be elaborated here.

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

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

[0080] The purification belt assembly is in an overall belt shape, for storing activated carbon, and includes a top winch 310, a first winch 320, a second winch 330, and two base belt bodies 340.

[0081] The top winch 310 is a winch structure, positioned on the inner side wall of the bin body 110 and close to the top of the bin body 110, for winding and releasing the base belt body 340.

[0082] The first winch 320 is a winch structure, positioned at a position close to the bottom inside the accommodating bin body 210, and on the side of the storage box 220 close to the bin body 110.

[0083] The second winch 330 is a winch structure, positioned at a position close to the top inside the accommodating bin body 210, and directly above the storage box 220.

[0084] Both of the two basic belt bodies 340 pass through the space between the top guide pulley 260 and the bottom guide pulley 270 and are always in a taut state;

[0085] For the convenience of description, the two basic belt bodies 340 are respectively defined as the first belt body and the second belt body herein. When in the accommodation bin 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] As Figure 4 and Figure 5 shown, the parts of the two basic belt bodies 340 on the side of the top guide pulley 260 close to the bin body 110 are closely attached to each other, and the two segments of the basic belt bodies 340 on the other side of the top guide pulley 260 are separated from each other; the paving component 230 is spatially between the two basic belt bodies 340 on the other side of the top guide pulley 260;

[0087] The first belt body and the second belt body are of equal length, and one end of each 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 winch 320, and the other end of the second belt body is fixed and wound around the second winch 330;

[0089] When the first belt body penetrates into the space between the top guide pulley 260 and the bottom guide pulley 270, it is stacked with the second belt body;

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

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

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

[0093] When the top winch 310 winds up, the basic belt body 340 moves towards the basic belt body 340, and the paving component 230 evenly scatters 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 wind up, the top winch 310 releases, 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] As Figure 5 and Figure 6As shown, the base belt body 340 includes a belt main body, side combination strips 341, and partition strips 342;

[0095] The belt main body is a mesh belt body, and its width is greater than the bottom diameter or the diameter of the circumscribed circle of the bottom surface of the vertical channel pipe 130;

[0096] The number of the side combination strips 341 is two, which are metal or non-metal soft strips, having the same length as the belt main body and fixed on the two side edges of the belt main body; the diameter of the circumscribed circle of the longitudinal section of the side combination strip 341 is greater than 4 cm; long strip-shaped protrusions and grooves are provided on the side combination strip 341; when two base belt bodies 340 are closely stacked, the side combination strips 341 thereon are mutually engaged; due to the existence of the side combination strips 341, a belt-shaped space with a thickness greater than 3 cm is formed between the two base belt bodies 340 after they are stacked;

[0097] The partition strips 342 are metal or non-metal soft strips, and the number of them is multiple, which are fixed on the belt main body, and the length direction is the same as the width direction of the belt main body, and the distance between each other is less than 15 cm; the existence of the partition strips 342 makes the activated carbon on the base belt body 340 not easy to aggregate due to the space movement of the base belt body 340.

[0098] Furthermore, the belt main body with a mesh structure also plays a certain filtering role for the waste gas; a jet cleaning assembly 240 is provided at a position above the storage box 220 and the second belt body in the storage bin body 210; the jet cleaning assembly 240 is a high-pressure air gun, which is used to jet air towards the base belt body 340 to wash off the adhered sundries thereon. This is prior art and will not be elaborated here.

[0099] Furthermore, in order to accelerate the detachment of the activated carbon from the base belt body 340, the treatment bin assembly further includes a vibration assembly 250, which is a combination of a motor, a transmission shaft and a cam, located inside the storage bin body 210, closely arranged against the base belt body 340, and vibrates 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 running:

[0101] The collection unit 001 first collects the waste gas (tail gas) and enters the pretreatment unit 002 for temperature reduction and dust removal treatment; then the waste gas enters the chamber body 110 through the input pipe 120, flows through the channel unit and flows through the base belt body 340 between the channel units multiple times for adsorption treatment and finally is discharged; the base belt body 340 moves and replaces the base belt body 340 between the channel units regularly according to the waste gas concentration; when it is necessary to replace the used activated carbon, the base belt body 340 is controlled to move towards the first winch 320 and the second winch 330, so that the used activated carbon falls into the storage box 220; then the base belt body 340 is controlled to move towards the top winch 310, and at the same time, the feeding assembly 230 is controlled to spread new or desorbed activated carbon on the second belt.

[0102] Furthermore, the waste gas treatment system for the granulation tail gas of the negative electrode coating material of the lithium-ion battery in this application further includes a catalytic combustion furnace 004, and the adsorbed waste gas is introduced into the catalytic combustion furnace 004 to remove the combustibles in the waste gas and then discharged.

[0103] Preferably, after the waste gas burns 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 can occur before the adsorption of the waste gas.

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

[0106] It solves the technical problems in the prior art that the equipment for treating the tail gas generated by the granulation operation has a low utilization rate of activated carbon as an adsorption material, low treatment efficiency of the tail gas, and a cumbersome process and requires shutdown operation when replacing the activated carbon, and realizes the technical effects of high utilization rate of activated carbon, relatively high treatment efficiency of the tail gas, convenient and fast process when replacing the activated carbon and no need for shutdown operation in the waste gas treatment system for the granulation tail gas of the negative electrode coating material of the lithium-ion battery.

[0107] Embodiment 2

[0108] In order to further improve the utilization of activated carbon and the degree of waste gas treatment in the waste gas treatment system for the granulation tail gas of the negative electrode coating material of the lithium-ion battery in this application, the structure of the purification chamber assembly is optimized and improved in this embodiment of the application on the basis of the above embodiment, specifically:

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

[0110] The chamber body 110 is of a box structure;

[0111] The inner treatment pipe 160 is a rigid circular pipe arranged horizontally as a whole, and is fixed on the inner wall of the bin body 110 through a fixing frame 170, and includes a gas transmission section 161, a breathable section 162 and an extension section 163;

[0112] The length of the gas transmission section 161 is greater than 40 cm, and it is connected to the pretreatment unit 002 for transmitting waste gas;

[0113] The breathable section 162 is a rigid circular pipe with dense through holes or a rigid circular pipe with a grid structure. One end is fixed to the end of the gas transmission section 161 and is connected to the gas transmission section 161;

[0114] The length of the extension section 163 is greater than 40 cm. One end is fixed to the other end of the breathable section 162 and is connected to the breathable section 162, and the other end is closed;

[0115] The fixing frame 170 is in a plate shape, rod shape and / or frame structure, and is fixed on the inner wall of the bin body 110, playing a role in bearing the inner treatment pipe 160 and the outer sleeve pipe;

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

[0117] The length of the outer sleeve pipe is more than 60 cm longer than the length of the breathable section 162, and includes a guiding pipe 181 and a breathable pipe 182; the guiding pipe 181 is a trumpet-shaped pipe body, located at both ends of the breathable pipe 182 and symmetrically arranged; the smaller end of the guiding pipe 181 is fixed to the end of the breathable pipe 182; the breathable pipe 182 is a rigid circular pipe with dense through holes or a rigid circular pipe with a grid structure;

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

[0119] As Figure 11 shown, the partition strips 342 on the belt body are arranged in a grid pattern, dividing the space between the two base belt bodies 340 into multiple block-shaped spaces;

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

[0121] Preferably, in order to facilitate the maintenance and cleaning of the purification bin assembly, as Figure 12As shown, the belt body is composed of three sections spliced together, namely a connection section 350, a cleaning section 360, and a base section 370. The cleaning section 360 is located in the middle, and the connection section 350 is arranged close to the top hoist 310. The connection section 350 serves as a connection and is a mesh belt body. The cleaning section 360 is a belt body with dense bristles thereon. The base section 370 is a fine mesh belt body for placing activated carbon. During use, the cleaning section 360 is periodically controlled to enter the gap between the inner treatment pipe 160 and the outer sleeve pipe and reciprocate to brush off the accumulated debris thereon.

[0122] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A granulation tail gas treatment system for a negative electrode coating material of a lithium-ion battery, comprising a collection unit (001), a pretreatment unit (002) and a purification unit (003); characterized in that: The purification unit (003) includes a purification chamber assembly, a treatment chamber assembly and a purification belt assembly; the purification chamber assembly includes a chamber body (110); the treatment chamber assembly includes a receiving chamber body (210) and a plurality of cylindrical guide wheels located inside the receiving chamber body (210), and the receiving chamber body (210) is arranged closely against the chamber body (110); The purification belt assembly includes a top winch (310) located near the top inside the chamber body (110), a first winch (320) located near the top inside the receiving chamber body (210) and away from the chamber body (110), a second winch (330) located at the bottom of the receiving chamber body (210), and two basic belt bodies (340); The two basic belt bodies (340) penetrate through the chamber body (110) and the receiving chamber body (210), are always in a straightened state, and one end of each is wound and positioned on the top winch (310), and the other ends are 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 soft strips are provided at the edges; the two basic belt bodies (340) are joined together inside the chamber body (110) under the guidance of the cylindrical guide wheels to form a strip-shaped space filled with activated carbon, and are separated inside the receiving chamber body (210); the operation of adding and removing the activated carbon on the basic belt body (340) is completed inside the receiving chamber body (210); a storage box (220) is arranged inside the receiving chamber body (210). When the activated carbon needs to be replaced, the purification belt assembly unloads the activated carbon into the storage box (220), and the storage box (220) is taken out regularly and the activated carbon inside is desorbed and reused; the tail gas introduced into the chamber body (110) is discharged after passing through the two basic belt bodies (340) in sequence; The purification chamber assembly includes an inner treatment pipe (160), a fixing frame (170) and an outer sleeve pipe; The inner treatment pipe (160) is a straight pipe, fixed on the inner wall of the chamber body (110) through the fixing frame (170), and includes a gas transmission section (161) communicated with the pretreatment unit (002), a breathable section (162) communicated with the gas transmission section (161), and an extension section (163) with one end communicated with the breathable section (162) and the other end closed; The outer sleeve pipe is sleeved on the inner treatment pipe (160), the two are coaxial, and are fixed on the fixing frame (170); The outer sleeve pipe includes a guiding pipe (181) and a breathable pipe (182); the guiding pipe (181) is a trumpet-shaped pipe body, located at both ends of the breathable pipe (182), and is symmetrically arranged; the smaller end of the guiding pipe (181) is fixed at the end of the breathable pipe (182); the breathable pipe (182) is densely provided with through holes or is a grid structure; The basic belt body (340) includes a belt main body, side combination strips (341) and partition strips (342); The partition strips (342) on the belt main body are arranged in a grid pattern; The combined belt body is inserted into the gap between the inner treatment pipe (160) and the outer sleeve pipe, and is deformed into a tubular shape under the guidance of the outer sleeve pipe and sleeved on the inner treatment pipe (160). The belt body is composed of three segments spliced together, namely a connecting segment (350), a cleaning segment (360), and a base segment (370). The cleaning segment (360) is located in the middle, and the connecting segment (350) is arranged close to the top hoist (310); the connecting segment (350) plays a connecting role and is a mesh belt body. The cleaning segment (360) is a belt body with dense bristles on it. The base segment (370) is a fine mesh belt body for placing activated carbon; during use, the cleaning segment (360) is periodically controlled to enter the gap between the inner treatment pipe (160) and the outer sleeve pipe and move back and forth to brush off the accumulated debris on it.

2. The granulation tail gas treatment system for the negative electrode coating material of the lithium-ion battery according to claim 1, characterized in that: The purification chamber assembly includes an input pipe (120) for conveying waste gas into the chamber body (110). One side of the chamber body (110) close to the treatment chamber assembly is provided with a penetration port.

3. The granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery according to claim 1, characterized in that: The treatment chamber assembly includes a containing chamber body (210), a storage box (220), a feeding assembly (230), a top guide wheel (260), a bottom guide wheel (270), and a reversing guide wheel (280). One side of the containing chamber body (210) close to the chamber body (110) is provided with a belt output port. The storage box (220) is a box body with an open top, placed inside the containing chamber body (210) and set away from the chamber body (110). The feeding assembly (230) is used to evenly distribute activated carbon on the base belt body (340), is communicated with the chamber body containing activated carbon, and the discharge port is located at the bottom. Both the top guide wheel (260) and the bottom guide wheel (270) are rollers arranged horizontally, with their ends positioned on the inner wall of the containing chamber body (210). The two are arranged one above the other and close to the belt output port, and the base belt body (340) passes between them. The reversing guide wheel (280) is a roller arranged horizontally, located directly above the storage box (220) and at the same height as or lower than the bottom guide wheel (270).

4. The granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery according to claim 3, wherein: The two base belt bodies (340) are the first belt body and the second belt body respectively. When in the containing chamber 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; the parts of the two base belt bodies (340) on the side of the top guide wheel (260) close to the chamber body (110) are closely attached together, and the two base belt bodies (340) on the other side of the top guide wheel (260) are separated from each other. The feeding assembly (230) is spatially between the two base belt bodies (340) 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 less than 5 degrees. The combined belt body passes through the belt output port and the penetration port and then enters the chamber body (110).

5. The granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery according to claim 1, characterized in that: A jet cleaning assembly (240) is provided at the position above the storage box (220) and the second belt body in the containing chamber body (210); the jet cleaning assembly (240) is a high-pressure air gun, used to jet air towards the base belt body (340) to wash off the adhered debris on it.

6. The granulation tail gas treatment system for the negative electrode coating material of a lithium-ion battery according to claim 1, characterized in that: The processing bin assembly further includes a vibration assembly (250), which is a combination of a motor, a transmission shaft, and a cam. It is located inside the accommodation bin body (210), is disposed closely against the base belt body (340), and vibrates and strikes the base belt body (340) during operation.

7. The granulation tail gas treatment system for the negative electrode coating material of the lithium ion battery according to claim 1, characterized in that: The distance between the air permeable pipe (182) and the air permeable section (162) is 1.1 to 1.3 times the thickness of the combined belt body.

Images