System for firstly pulverizing and then pyrolyzing and recycling positive pole piece

Abstract

The utility model discloses a system for firstly pulverizing and then pyrolyzing and recovering a positive pole piece. The system comprises a conveyor; the crushing system is connected with the conveyor; the screening device is connected with the crushing system; a first sending cabin; a third vacuum conveying system; a second sending cabin; a first vacuum delivery system; an aluminum bin; the black powder trapping system is connected with the crushing system; the third sending bin and the fourth sending bin are connected with the black powder trapping system; the black powder temporary storage bin is communicated with the third vacuum conveying system; the pyrolysis system is connected with the black powder temporary storage bin; a second vacuum conveying system; the tail gas flying dust treatment system is connected with the pyrolysis system; a fifth sending bin; a sixth sending bin; a material processing system; a fourth vacuum conveying system; and a black powder bin. Compared with the prior art, the technical scheme provided by the utility model has the advantages that the pyrolysis efficiency can be improved, the energy consumption can be reduced, and the pole piece material recovery rate and the product purity can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery material recovery technical field more specifically, especially, relate to a kind of positive pole piece first beat powder and then pyrolysis recovery system. BACKGROUND

[0002] Lithium battery has the characteristics such as high energy density, long cycle life, safety and environmental protection, and is widely used in production and life, from small electronic equipment such as Bluetooth headset to large energy storage system such as power station energy storage, lithium battery is indispensable. In the production process of lithium battery, a large amount of pole piece offcut and unqualified pole piece will be produced. These offcut and unqualified materials not only occupy a large amount of storage space, but also are a valuable resource library, so battery pole piece recovery is of great significance.

[0003] However, the existing pole piece recovery process usually adopts the method of "first pyrolysis and then powder removal", and this method has the following defects: the pole piece is directly heated, the pyrolysis time is long, the pyrolysis efficiency is low, and the energy consumption is high; in the pyrolysis process, high-temperature pyrolysis will cause part of the positive pole piece material to volatilize or degrade, resulting in low material recovery rate; after pyrolysis, it is difficult to completely remove the base material and other impurities in the separation process, resulting in low product purity.

[0004] Therefore, how to provide a positive pole piece first beat powder and then pyrolysis recovery system, which can improve the pyrolysis efficiency, reduce the energy consumption, and improve the pole piece material recovery rate and product purity, has become a technical problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model provides a positive pole piece first beat powder and then pyrolysis recovery system, which can improve the pyrolysis efficiency, reduce the energy consumption, and improve the pole piece material recovery rate and product purity.

[0006] The technical scheme provided by the utility model is as follows:

[0007] The utility model provides a positive pole piece first hits powder and then pyrolysis recycling system, include: conveyer, the conveyer is used for conveying the positive pole piece of recycling, with the powder system that the conveyer links to each other, the powder system is used for smashing the positive pole piece and divides the positive pole piece particle after smashing into light material and heavy material, with the screening plant that the powder system links to each other, the screening plant is used for separating the aluminium particle and black powder in heavy material, with the first sending bin that the screening plant links to each other, the first sending bin is used for the black powder that stores temporarily separates out, with the third vacuum conveying system that the first sending bin links to each other, with the second sending bin that the screening plant links to each other, the second sending bin is used for the aluminium particle that stores temporarily separates out, with the first vacuum conveying system that the second sending bin links to each other, with the aluminium bin that the first vacuum conveying system links to each other, with the black powder trapping system that the powder system links to each other, the black powder trapping system is used for separating the black powder particle that light material carries with air in the conveying process, with the third sending bin and the fourth sending bin that the black powder trapping system links to each other, the third sending bin and the fourth sending bin are used for the black powder that stores temporarily traps, with the tail gas dust processing system that the black powder trapping system links to each other, the third sending bin and the fourth sending bin still link to each other with the third vacuum conveying system, with the sixth sending bin that the tail gas dust processing system links to each other, the sixth sending bin is used for the black powder that stores temporarily separates out in dust separation, the sixth sending bin still links to each other with the third vacuum conveying system, with the black powder buffer bin that the third vacuum conveying system is linked together, the black powder buffer bin is used for the black powder particle that concentrates separation carries in the conveying process, with the pyrolysis system that the black powder buffer bin links to each other, with the second vacuum conveying system that the black powder buffer bin links to each other, with the tail gas dusting processing system that the pyrolysis system links to each other, with the fifth sending bin that the tail gas dusting processing system links to each other, the fifth sending bin is used for the black powder that stores temporarily separates out in dust separation, the fifth sending bin still links to each other with the second vacuum conveying system, with the material processing system that the pyrolysis system links to each other, with the fourth vacuum conveying system that the material processing system links to each other, with the black powder bin that the fourth vacuum conveying system links to each other.

[0008] Further, in a preferred mode of the utility model, the powder system comprises: a single-shaft shredder connected to the conveyer, the single-shaft shredder is used for shredding the positive pole piece into blocks; a grinding and powder removing main machine connected to the single-shaft shredder, the grinding and powder removing main machine is used for grinding the shredded positive pole piece into mixed particles of aluminium particles and black powder.

[0009] Further, in a preferred mode of the utility model, the pyrolysis system comprises: a pyrolysis furnace feeder connected to the black powder buffer bin, the pyrolysis furnace feeder is used for continuously conveying the black powder; a pyrolysis rotary furnace in communication with the pyrolysis furnace feeder, the pyrolysis rotary furnace is used for decomposing the organic matter in the black powder.

[0010] Further, in a preferred mode of the utility model, the material processing system comprises: a cooling device connected with the pyrolysis rotary furnace, which is used for cooling the black powder after pyrolysis;Wherein, the black powder is transported to the black powder bin through the fourth vacuum conveying system after being cooled in the cooling device.

[0011] Further, in a preferred mode of the utility model, it further comprises: a nitrogen supply system connected with the pyrolysis rotary furnace, which is used for continuously supplying nitrogen to the pyrolysis rotary furnace.

[0012] Further, in a preferred mode of the utility model, the black powder trapping system comprises: a cyclone trap connected with the crushing system, which is used for trapping black powder in the conveying process;The cyclone trap is also connected with the third sending bin;A pulse trap in communication with the cyclone trap, which is used for trapping black powder in the conveying process;The pulse trap is also connected with the fourth sending bin;A material high-pressure fan connected with the pulse trap, which is used for providing high-pressure air, and the airflow generated blows the black powder into the cyclone trap.

[0013] Further, in a preferred mode of the utility model, the tail gas dust handling system comprises: a high-temperature dust collector connected with the pyrolysis system, which is used for recycling black powder in the tail gas generated by pyrolysis and the dust generated in the pyrolysis process.

[0014] Further, in a preferred mode of the utility model, the first vacuum conveying system comprises: a first vacuum conveying device connected with the aluminum bin;A first vacuum pump connected with the first vacuum conveying device;The second vacuum conveying system comprises: a second vacuum conveying device connected with the fifth sending bin;A second vacuum pump connected with the second vacuum conveying device;The third vacuum conveying system comprises: a third vacuum conveying device connected with the first sending bin, the third sending bin, the fourth sending bin and the sixth sending bin;A third vacuum pump connected with the third vacuum conveying device;The fourth vacuum conveying system comprises: a fourth vacuum conveying device connected with the black powder bin;A fourth vacuum pump connected with the fourth vacuum conveying device.

[0015] Further, in a preferred mode of the utility model, the tail gas dust handling system comprises: a pulse dust collector connected with the material high-pressure fan;The pulse dust collector is used for recycling black powder in the tail gas generated by the first vacuum pump, the second vacuum pump, the third vacuum pump and the fourth vacuum pump and the pulse dust collector;An exhaust chimney connected with the pulse dust collector, which is used for discharging the tail gas treated by the pulse dust collector.

[0016] Further, in a preferred mode of the utility model, it further comprises: a tail gas treatment system connected with the high-temperature dust collector.

[0017] Further, the tail gas treatment system comprises: a incinerator connected with the high-temperature dust collector, the incinerator is used for high-temperature incineration of organic matter in tail gas;A quench tower connected with the incinerator, the quench tower is used for reducing the temperature of tail gas;A first spray tower connected with the quench tower;A second spray tower connected with the first spray tower;A demister connected with the second spray tower, the demister is used for removing moisture and mist in tail gas;An activated carbon adsorption tower connected with the demister, the activated carbon adsorption tower is used for adsorbing harmful gas in tail gas;A tail gas high-pressure fan connected with the activated carbon adsorption tower, the tail gas high-pressure fan is used for providing the airflow power required for tail gas treatment;A tail gas chimney connected with the tail gas high-pressure fan.

[0018] The utility model discloses an anode sheet first hits powder and then pyrolysis recycling system, include: conveyer, the conveyer is used for conveying the anode sheet of recycling, with the powder system that the conveyer links to each other, the powder system is used for smashing the anode sheet and divide the anode sheet particle after smashing into light material and heavy material, with the screening device that the powder system links to each other, the screening device is used for separating the aluminum particle and black powder in heavy material, with the first sending bin that the screening device links to each other, the first sending bin is used for the black powder of temporary storage separation, with the third vacuum conveying system that the first sending bin links to each other, with the second sending bin that the screening device links to each other, the second sending bin is used for the aluminum particle of temporary storage separation, with the first vacuum conveying system that the second sending bin links to each other, with the aluminum bin that the first vacuum conveying system links to each other, with the black powder trapping system that the powder system links to each other, the black powder trapping system is used for separating the black powder particle and air that light material carries in conveying process, with the third sending bin and the fourth sending bin that the black powder trapping system links to each other, the third sending bin and the fourth sending bin are used for the black powder of temporary storage trapping, the third sending bin and the fourth sending bin still with the third vacuum conveying system link to each other, with the tail gas dust processing system that the black powder trapping system links to each other, with the sixth sending bin that the tail gas dust processing system links to each other, the sixth sending bin is used for the black powder of temporary storage separation, the sixth sending bin still with the third vacuum conveying system link to each other, with the black powder buffer bin that the third vacuum conveying system is linked together, the black powder buffer bin is used for the black powder particle of centralized separation carrying in conveying process, with the pyrolysis system that the black powder buffer bin links to each other, with the second vacuum conveying system that the black powder buffer bin links to each other, with the tail gas dust processing system that the pyrolysis system links to each other, with the fifth sending bin that the tail gas dust processing system links to each other, the fifth sending bin is used for the black powder of temporary storage dust separation, the fifth sending bin still with the second vacuum conveying system link to each other, with the material processing system that the pyrolysis system links to each other, with the fourth vacuum conveying system that the material processing system links to each other, with the black powder bin that the fourth vacuum conveying system links to each other.

[0019] The utility model relates to a technical scheme that first punches powder and then pyrolyzes, and the positive pole piece recovered by the conveyor enters the crushing system, the positive pole piece is torn by the crushing system, and the powder is divided into heavy material and light material, the heavy material is screened by the screening device into aluminum particles and black powder, the screened black powder enters the first sending bin, the screened aluminum particles enter the second sending bin, and enter the aluminum bin storage through the first vacuum conveying system, the black powder particles in the light material are captured by the black powder capturing system, the captured black powder is temporarily stored in the third sending bin and the fourth sending bin, the tail gas of the first vacuum conveying system, the second vacuum conveying system, the third vacuum conveying system and the fourth vacuum conveying system is separated from the black powder particles by the tail gas dust treatment system, and the black powder particles enter the fifth sending bin, simultaneously, the tail gas and the dust generated by the pyrolysis system enter the tail gas dust treatment system, and the separated black powder particles enter the fifth sending bin, the tail gas generated by the vacuum pump enters the tail gas dust treatment system, and the separated black powder particles enter the sixth sending bin, the black powder temporarily stored in the first sending bin, the third sending bin, the fourth sending bin and the sixth sending bin enters the black powder buffer bin through the third vacuum conveying system, and the black powder temporarily stored in the fifth sending bin enters the black powder buffer bin through the second vacuum conveying system, the black powder buffer bin conveys the black powder into the pyrolysis system and carries out pyrolysis, the pyrolyzed black powder enters the material treatment system and carries out treatment, and finally enters the black powder bin through the fourth vacuum conveying system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0021] Figure 1 It is a schematic diagram of the positive pole piece first powder punching and then pyrolysis recovery system provided by the utility model embodiment.

[0022] Figure 2 It is a schematic diagram of the tail gas treatment system related to the utility model embodiment.

[0023] Figure 3 It is a schematic diagram of the crushing system related to the utility model embodiment.

[0024] Figure 4 A schematic view of a vacuum conveying system according to an embodiment of the present application is shown in FIG. 1.

[0025] Figure 5 A schematic view of a pyrolysis system according to an embodiment of the present application is shown in FIG. 2.

[0026] Figure 6 A schematic view of a tail gas dust treatment system according to an embodiment of the present application is shown in FIG. 3.

[0027] Figure 7 A schematic view of a tail gas dust treatment system according to an embodiment of the present application is shown in FIG. 3.

[0028] Figure 8 A schematic view of a material treatment system according to an embodiment of the present application is shown in FIG. 4.

[0029] Reference signs:

[0030] Conveyor 1; crushing system 2; single-shaft shredder 201; grinding and powder removing main machine 202; first sending bin 301; second sending bin 302; third sending bin 303; fourth sending bin 304; fifth sending bin 305; sixth sending bin 306; black powder buffer bin 307; first vacuum conveying system 31; first vacuum conveying device 312; first vacuum pump 313; second vacuum conveying system 32; second vacuum conveying device 308; second vacuum pump 309; third vacuum conveying system 33; third vacuum conveying device 310; third vacuum pump 311; fourth vacuum conveying system 34; fourth vacuum conveying device 314; fourth vacuum pump 315; pyrolysis system 4; pyrolysis furnace feeder 401; pyrolysis rotary furnace 402; black powder capturing system 51; cyclone collector 501; pulse collector 502; material high-pressure fan 503; tail gas dust treatment system 52; pulse dust collector 504; tail gas dust treatment system; high-temperature dust collector 505; exhaust chimney 600; tail gas treatment system 6; incinerator 601; quenching tower 602; first spray tower 603; second spray tower 604; demister 605; activated carbon adsorption tower 606; tail gas high-pressure fan 607; tail gas chimney 608; aluminum bin 7; black powder bin 8; screening device 9; material treatment system 10; cooling equipment 403. DETAILED DESCRIPTION

[0031] In order to make the technical scheme of the present application better understood by those skilled in the art, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0032] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple", "several" is two or more than two, unless otherwise explicitly specified.

[0035] It should be understood that the structures, proportions, sizes and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0036] For example, Figures 1 to 8The utility model discloses an anode sheet first powder and then pyrolysis recycling system, including: conveyor 1, the conveyor 1 is used for conveying the anode sheet of recycling, with the powder system 2 of smashing of conveyor 1, the powder system 2 is used for smashing anode sheet and divide the particle of smashed anode sheet into light material and heavy material, with the screening device 9 of powder system 2, the screening device 9 is used for separating the aluminum particle and black powder in heavy material, with the first sending bin 301 of screening device 9, the first sending bin 301 is used for the temporary storage of separated black powder, with the third vacuum conveying system 33 of first sending bin 301, with the second sending bin 302 of screening device 9, the second sending bin 302 is used for the temporary storage of separated aluminum particle, with the first vacuum conveying system 31 of second sending bin 302, with the aluminum bin 7 of first vacuum conveying system 31, with the black powder trapping system 51 of powder system 2, the black powder trapping system 51 is used for separating the black powder particle and air that light material carries in conveying process, with the third sending bin 303 and the fourth sending bin 304 of black powder trapping system 51, the third sending bin 303 and the fourth sending bin 304 are used for the temporary storage of trapped black powder, the third sending bin 303 and the fourth sending bin 304 are also connected with the third vacuum conveying system 33, with the tail gas dust processing system 53 of black powder trapping system 51, with the sixth sending bin 306 of tail gas dust processing system 53, the sixth sending bin 306 is used for the temporary storage of black powder separated by dust removal, the sixth sending bin 306 is also connected with the third vacuum conveying system 33, with the black powder buffer bin 307 of third vacuum conveying system 33, the black powder buffer bin 307 is used for concentrating the black powder particle carried in conveying process, with the pyrolysis system 4 of black powder buffer bin 307, with the second vacuum conveying system 32 of black powder buffer bin 307, with the tail gas dust handling system 52 of pyrolysis system 4, with the fifth sending bin 305 of tail gas dust handling system 52, the fifth sending bin 305 is used for the temporary storage of black powder separated by dust removal, the fifth sending bin 305 is also connected with the second vacuum conveying system 32, with the material handling system 10 of pyrolysis system 4, with the fourth vacuum conveying system 34 of material handling system 10, with the black powder bin 8 of fourth vacuum conveying system 34.

[0037] The utility model relates to a technical scheme that first punches powder and then pyrolyzes, and the positive pole piece recovered by the conveyor 1 enters the crushing system 2, the positive pole piece is torn and crushed by the crushing system 2, and the heavy material and the light material are separated by powder removal, the heavy material is screened into aluminum particles and black powder by the screening device 9, the screened black powder enters the first sending bin 301, the screened aluminum particles enter the second sending bin 302, and enter the aluminum bin 7 for storage through the first vacuum conveying system 31, the black powder particles in the light material are captured by the black powder capturing system 51, and the captured black powder is temporarily stored in the third sending bin 303 and the fourth sending bin 304, the tail gas generated by the first vacuum conveying system 31, the second vacuum conveying system 32, the third vacuum conveying system 33 and the fourth vacuum conveying system 34 is separated from the black powder particles by the tail gas dust treatment system 53, and the black powder particles enter the fifth sending bin 305, simultaneously, the tail gas and the dust generated by the pyrolysis system 4 enter the tail gas dust treatment system 52, the separated black powder particles enter the fifth sending bin 305, the tail gas generated by the vacuum pump enters the tail gas dust treatment system 53, the separated black powder particles enter the sixth sending bin 306, the black powder temporarily stored in the first sending bin 301, the third sending bin 303, the fourth sending bin 304 and the sixth sending bin 306 enters the black powder buffer bin 307 through the third vacuum conveying system 33, and the black powder temporarily stored in the fifth sending bin 305 enters the black powder buffer bin 307 through the second vacuum conveying system 32, the black powder buffer bin 307 conveys the black powder into the pyrolysis system 4 for pyrolysis, the pyrolyzed black powder enters the material treatment system 10 for treatment, and finally enters the black powder bin 8 through the fourth vacuum conveying system 34.

[0038] More specifically, in the utility model embodiment, the screening device 9 is specifically a disc screen.

[0039] More specifically, in the utility model embodiment, the black powder is specifically a metal mixture composed of the crushed waste battery material, and the black powder includes lithium, manganese, cobalt and nickel.

[0040] More specifically, the heavy material is specifically a mixture of aluminum material and a small amount of black powder, and the light material is specifically air carrying black powder particles.

[0041] Specifically, in the embodiment of the utility model, the pulverizing system 2 includes: single shaft shredder 201 connected with the conveyor 1, the single shaft shredder 201 is used to shred the positive pole piece into blocks;Grinding and powder removing main machine 202 connected with the single shaft shredder 201, the grinding and powder removing main machine 202 is used to grind the shredded positive pole piece into the mixed particles of aluminum particles and black powder.

[0042] Wherein, the conveyor 1 transports the recovered positive pole piece to the single shaft shredder 201 of the pulverizing system 2, the single shaft shredder 201 shreds the positive pole piece into blocks.The shredded blocks enter the grinding and powder removing main machine 202 through the conveying system, and the grinding and powder removing main machine 202 further grinds the shredded positive pole piece into mixed particles of aluminum particles and black powder.The positive pole piece is shredded into uniform blocks by the high-speed rotating blade of the single shaft shredder 201, which avoids the agglomeration phenomenon, facilitates grinding and separation, and improves the overall operation efficiency;The shredded blocks are further ground into particles by the grinding and powder removing main machine 202, which ensures that the positive material, i.e.black powder, and the base material, i.e.aluminum particles, are completely separated, the mixed particles after grinding are uniform in size, which is beneficial to subsequent separation and processing, and improves the purity of the recovered material.The whole process ensures efficient shredding, grinding, separation and processing of the positive pole piece, and realizes high-purity recovery of the material.

[0043] Specifically, in the embodiment of the utility model, the pyrolysis system 4 includes: pyrolysis furnace feeder 401 connected with the black powder buffer bin 307, the pyrolysis furnace feeder 401 is used for continuously conveying black powder;Pyrolysis rotary furnace 402 in communication with the pyrolysis furnace feeder 401, the pyrolysis rotary furnace 402 is used for decomposing organic matter in black powder.

[0044] Wherein, the pyrolysis furnace feeder 401 continuously and uniformly feeds the black powder into the pyrolysis rotary furnace 402, and the pyrolysis rotary furnace 402 pyrolyzes the black powder under high temperature conditions, usually 500-800°C, to decompose the organic matter in the black powder, ensuring that the organic matter in the black powder is completely removed and improving the purity of the black powder.

[0045] Specifically, in the embodiment of the utility model, the material processing system 10 includes: cooling equipment 403 connected with the pyrolysis rotary furnace 402, the cooling equipment 403 is used for cooling the pyrolyzed black powder;Wherein, the black powder is cooled in the cooling equipment 403, and then conveyed to the black powder bin 8 through the fourth vacuum conveying system 34.

[0046] The temperature of the pyrolyzed black powder is high, and the cooling device 403 reduces the temperature of the pyrolyzed black powder to a safe range by means of cooling water or air cooling, and the cooled black powder is sent into the black powder bin through a conveying system, so that the physical properties of the black powder are stable, and the black powder is convenient for subsequent storage and use. The whole process realizes high-purity recovery of the material, improves the continuity and stability of the system, and ensures the production efficiency and the quality of the recovered material.

[0047] Specifically, in the embodiment of the utility model, still include: with the pyrolysis rotary furnace 402 link's nitrogen supply system, the nitrogen supply system is used for continuously supplying nitrogen to the pyrolysis rotary furnace 402.

[0048] The nitrogen supply system continuously supplies nitrogen to the pyrolysis rotary furnace, ensures that the pyrolysis process is carried out in an inert gas environment, prevents oxidation reaction, and improves the pyrolysis efficiency. At the same time, the continuous supply of nitrogen ensures that the pyrolysis process is carried out in an oxygen-free environment, avoids oxidation reaction of organic matter, reduces the generation of harmful gas, and improves the purity of the pyrolysis product.

[0049] Specifically, in the embodiment of the utility model, the black powder trapping system 51 includes: a cyclone trap 501 connected to the crushing system 2, the cyclone trap 501 is used for trapping black powder in the conveying process, the cyclone trap 501 is also connected to the third sending bin 303, a pulse trap 502 in communication with the cyclone trap 501, the pulse trap 502 is used for trapping black powder in the conveying process, the pulse trap 502 is also connected to the fourth sending bin 304, and a material high-pressure fan 503 connected to the pulse trap 502, the material high-pressure fan 503 is used to provide high-pressure air, and the generated airflow blows the black powder into the cyclone trap 501.

[0050] Specifically, in the embodiment of the utility model, the tail gas dust handling system 52 includes: a high-temperature dust collector 505 connected to the pyrolysis system 4, the high-temperature dust collector 505 is used for recycling black powder in the tail gas generated by pyrolysis and the dust generated in the pyrolysis process.

[0051] Specifically, in the embodiment of the utility model, the tail gas dust handling system 53 includes: a pulse dust collector 504 connected to the material high-pressure fan 503, the pulse dust collector 504 is used for recycling black powder in the tail gas generated by the first vacuum pump 313, the second vacuum pump 309, the third vacuum pump 311 and the fourth vacuum pump 315, and an exhaust chimney 600 connected to the pulse dust collector 504, the exhaust chimney 600 is used for discharging the tail gas treated by the pulse dust collector 504.

[0052] The tail gas discharged by the vacuum pump is treated by the pulse dust collector 504 before being discharged, so that the discharged tail gas meets the requirements of environmental protection regulations.

[0053] The black powder capturing system 51 and the tail gas dust treatment system 52 ensure efficient capturing and recycling of black powder during the whole conveying and treatment process. The double capturing mechanism of the cyclone collector 501 and the pulse collector 502 ensures that the black powder in the conveying process is effectively captured, and the loss of black powder is reduced. The high-pressure airflow provided by the material high-pressure fan 503 blows the captured black powder back into the cyclone collector 501, further improving the recycling rate of the black powder. The pulse dust collector 504 and the high-temperature dust collector 505 capture the black powder in the dust generated in the conveying process and the pyrolysis process, respectively, ensuring clean and efficient operation of the whole system.

[0054] Specifically, in the embodiment of the utility model, the first vacuum conveying system 31 includes: the first vacuum conveying device 312 connected with the aluminum bin 7;The first vacuum pump 313 connected with the first vacuum conveying device 312;The second vacuum conveying system 32 includes: the second vacuum conveying device 308 connected with the fifth sending bin 305;The second vacuum pump 309 connected with the second vacuum conveying device 308;The third vacuum conveying system 33 includes: the third vacuum conveying device 310 connected with the first sending bin 301, third sending bin 303, fourth sending bin 304 and sixth sending bin 306;The third vacuum pump 311 connected with the third vacuum conveying device 310;The fourth vacuum conveying system 34 includes: the fourth vacuum conveying device 314 connected with the black powder bin 8;The fourth vacuum pump 315 connected with the fourth vacuum conveying device 314.

[0055] Among them, through a plurality of vacuum conveying devices, ensure that the material has a stable intermediate storage point in the conveying process, reduce the pressure fluctuation in the conveying process, improve the stability of conveying;Through the negative pressure conveying of vacuum pump, the material is conveyed from the matched vacuum conveying device to the target storage bin, which ensures efficient transmission of the material in the conveying process and reduces dust generation. At the same time, through the conveying system, the closed conveying of the material is realized, the leakage of the material in the conveying process is reduced, and the material recycling rate is improved.

[0056] Specifically, in the embodiment of the utility model, still include: with the high temperature dust collector 505 connects the tail gas treatment system 6, the tail gas treatment system 6 includes: with the high temperature dust collector 505 connects the incinerator 601, the incinerator 601 is used for high temperature incineration organic matter in tail gas;With the incinerator 601 connects the quench tower 602, the quench tower 602 is used for reducing tail gas temperature;With the quench tower 602 connects the first spray tower 603;With the first spray tower 603 connects the second spray tower 604;With the second spray tower 604 connects the demister 605, the demister 605 is used to remove moisture and mist in tail gas;With the demister 605 connects the activated carbon adsorption tower 606, the activated carbon adsorption tower 606 is used for adsorbing harmful gas in tail gas;With the activated carbon adsorption tower 606 connects the tail gas high pressure fan 607, the tail gas high pressure fan 607 is used for providing the airflow power required for tail gas treatment;With the tail gas high pressure fan 607 connects the tail gas chimney 608.

[0057] Wherein, through high temperature incineration, organic matter in tail gas is thoroughly decomposed, and harmful substance emission is reduced;Through quenching, tail gas temperature is rapidly reduced, and damage of high temperature tail gas to subsequent treatment equipment is avoided;Through spraying water, particulate matter and part of harmful gas in tail gas are removed, and tail gas is preliminarily purified;Through secondary spraying, particulate matter and harmful gas in tail gas are further removed, and tail gas is further purified;Through demisting, tail gas humidity is avoided from being too high, thereby affecting subsequent treatment equipment;Through adsorption of activated carbon, harmful gas in tail gas is removed;Through operation of high pressure fan 607, smooth flow of tail gas in treatment system is ensured, and tail gas treatment efficiency is improved;Through tail gas chimney 608, treated tail gas is discharged into atmosphere, and discharged tail gas reaches environmental protection standard. Through multistage purification of quench tower 602, first spray tower 603, second spray tower 604, demister 605 and activated carbon adsorption tower 606, harmful substances in tail gas are effectively removed, discharged tail gas reaches environmental protection standard, equipment corrosion and damage are reduced, and equipment service life is prolonged.

[0058] More specifically, in the embodiment of the utility model, the pyrolysis rotary furnace 402 includes: a rotary furnace body in communication with an outlet of the pyrolysis furnace feeder 401, the rotary furnace body includes two sections: a preheating section structure located at one end of the rotary furnace body close to the pyrolysis furnace feeder 401; a main pyrolysis section structure located at one end of the rotary furnace body away from the pyrolysis furnace feeder 401; a temperature control system provided on the rotary furnace body, the temperature control system includes: a preheating section temperature sensor provided on the inner wall of the preheating section structure; a preheating section heating element provided on the inner wall of the preheating section structure; a main pyrolysis section temperature sensor provided on the inner wall of the main pyrolysis section structure; a main pyrolysis section heating element provided on the inner wall of the main pyrolysis section structure.

[0059] More specifically, in the embodiment of the present application, the target temperature range of the preheating section is 200-400 DEG C, and the target temperature range of the main pyrolysis section is 500-800 DEG C.

[0060] Wherein, directly feeding the normal temperature material into the high temperature main pyrolysis section will cause thermal shock of the equipment, causing deformation or damage of the equipment. The preheating section can gradually increase the temperature of the material, reduce the thermal shock, protect the service life of the equipment, and make the temperature of the material more uniform when entering the main pyrolysis section, ensure the uniformity of the pyrolysis process, reduce the side reactions of the material in the main pyrolysis section, such as excessive carbonization or coking, ensure the purity and quality of the pyrolysis products, and improve the quality of the products. In addition, the required temperature for preheating is relatively low, and the required energy is also less, reducing the overall energy consumption. The main pyrolysis section structure pyrolyzes the preheated material at high temperature, decomposes the organic matter therein, and generates gas and dust. The temperature control system ensures that the temperature of the preheating section and the main pyrolysis section is within the set range, realizes accurate temperature control, and improves the pyrolysis efficiency and product quality. Through segmented heating, the system shortens the heating time of the main pyrolysis section, thereby shortening the time of the entire pyrolysis process, reducing the production energy consumption, and improving the production efficiency.

[0061] More specifically, in the embodiment of the present application, further comprising: a multi-stage grinding device arranged in the interior of the grinding and de-powdering main machine 202, the multi-stage grinding device comprising: a main machine feed inlet; a grinding and de-powdering main machine body; a first-stage grinding mechanism connected with the main machine feed inlet, the first-stage grinding mechanism comprising: a first-stage rotary grinding roller arranged on the inner wall of the grinding and de-powdering main machine body; a first-stage grinding plate arranged below the first-stage rotary grinding roller; a first-stage screen arranged at the outlet of the first-stage grinding mechanism; a second-stage grinding mechanism connected with the first-stage grinding mechanism, the second-stage grinding mechanism comprising: a second-stage rotary grinding roller arranged on the inner wall of the grinding and de-powdering main machine body; a second-stage grinding plate arranged below the second-stage rotary grinding roller; a second-stage screen arranged at the outlet of the second-stage grinding mechanism; a third-stage grinding mechanism connected with the second-stage grinding mechanism, the third-stage grinding mechanism comprising: a third-stage rotary grinding roller arranged on the inner wall of the grinding and de-powdering main machine body; a third-stage grinding plate arranged below the third-stage rotary grinding roller; a third-stage screen arranged at the outlet of the third-stage grinding mechanism; and a main machine discharge outlet connected with the third-stage grinding mechanism.

[0062] More specifically, in the embodiment of the present application, further comprising: a convex structure arranged on the first-stage grinding plate, the second-stage grinding plate, and the third-stage grinding plate.

[0063] The shredded material enters a grinding and de-powdering main machine from a main machine feed inlet, is processed through a first grinding mechanism, a first rotary grinding roller preliminarily grinds the entering material through high-speed rotation, a first grinding plate cooperates with the first rotary grinding roller, and the material is further refined through shearing and extrusion, the material processed through the first grinding is screened through a first screen, and the material that does not meet the standard is returned to the first grinding mechanism for continuous grinding; the material processed through the first grinding is processed through a second grinding mechanism, a second rotary grinding roller further grinds the entering material through high-speed rotation, a second grinding plate cooperates with the second rotary grinding roller, and the material is further refined through shearing and extrusion, the material processed through the second grinding is screened through a second screen, and the material that does not meet the standard is returned to the second grinding mechanism for continuous grinding; the material processed through the second grinding is processed through a third grinding mechanism, a third rotary grinding roller finally grinds the entering material through high-speed rotation, a third grinding plate cooperates with the third rotary grinding roller, and the material is further refined through shearing and extrusion, the material processed through the third grinding is screened through a third screen, and the material that does not meet the standard is returned to the third grinding mechanism for continuous grinding. Moreover, the protruding structure on the grinding plate increases the roughness of the grinding plate, improves the grinding efficiency, and reduces the grinding time and energy consumption; the screens at the outlets of the grinding mechanisms ensure that only the material meeting the specified particle size can pass through, the material that does not meet the standard is returned to the grinding mechanism for continuous grinding, and the grinding effect is ensured. Through the step-by-step refinement of the multi-stage grinding mechanism, dynamic de-powdering is realized, the positive plate material is completely separated from the base material, impurities are reduced, the purity of the recycled material is improved, the material recycling rate is improved, meanwhile, the design of the multi-stage grinding mechanism reduces the load of a single grinding mechanism, and prolongs the service life of the equipment.

[0064] More specifically, in the embodiment of the utility model, still include: be located between the pyrolysis rotary furnace 402 and the cooling equipment 403's waste heat recovery device, be located on the preheating section structure with the open structure that the outlet of waste heat recovery device links to.

[0065] More specifically, in the embodiment of the utility model, the waste heat recovery device includes: a heat exchanger connected to the outlet of the pyrolysis rotary furnace 402, the heat exchanger is used to recover the heat in the high-temperature gas discharged from the pyrolysis rotary furnace 402; a heat exchange pipe located inside the heat exchanger, the heat exchange pipe is used to transfer heat; and a fan connected to the heat exchange pipe, the fan is used to introduce the high-temperature gas discharged from the pyrolysis rotary furnace 402 into the heat exchanger.

[0066] Wherein, through the suction effect of the fan, it is ensured that the high-temperature gas can smoothly enter the heat exchanger, and the efficiency of heat exchange is improved; through the heat exchange process, the heat in the high-temperature gas is transferred to the material that needs to be preheated, realizing the reuse of energy, and at the same time, by introducing the recovered heat into the preheating section, the heating efficiency of the preheating section is improved, and the energy consumption is reduced.

[0067] More specifically, lithium batteries have high energy density, long cycle life, safety and environmental protection, etc. In production and life, from small electronic devices such as Bluetooth headset to large energy storage systems such as power station energy storage, lithium batteries are widely used. In the production process of lithium batteries, a large amount of pole piece offcuts and unqualified pole pieces will be generated. These offcuts and unqualified materials not only occupy a large amount of storage space, but also are a valuable resource library, so the battery pole piece recycling is of great significance.

[0068] Among them, the positive pole piece first powdering and pyrolysis recycling system provided by the embodiment of the utility model is divided into three sections: crushing and powdering, pyrolysis recycling, and tail gas treatment. First, the pole piece material is crushed, scattered, and ground to remove powder, the black powder falling off the pole piece is collected, the collected material is pyrolyzed, and finally the pyrolyzed material is cooled and packaged. The pole piece is manually fed into the conveyor, the aluminum particles and black powder are separated in the crushing and powdering section, and then the aluminum particles are transported to the aluminum bin and the black powder is transported to the black powder buffer bin through the vacuum conveying system; the black powder in the black powder buffer bin is sent to the pyrolysis system through the conveyor, and the pyrolyzed material is cooled through the cooling equipment and then transported to the black powder bin through the vacuum conveying system for collection. Through the optimization of the process flow, the problems of large occupied area, high energy consumption, low material recovery rate, and easy material leakage at the connection of each device in the traditional pyrolysis and powdering process are solved. The technical scheme involved in the utility model can ensure that the positive pole piece material is stripped clean, the recovered positive pole piece material has high purity, the pyrolysis efficiency is high, the equipment occupies a small area, and the recovered positive material can meet the battery grade standard. The whole process adopts closed conveying, there is no dust leakage, and the energy consumption is low.

[0069] Compared with the prior art, the positive pole piece first powdering and pyrolysis recycling system provided by the utility model has low energy consumption, improves the recovery rate of the pole piece material, and has a small equipment footprint. Through process optimization, the recovered material can be used as battery grade black powder without the need for purification treatment, reducing operating costs. At the same time, the tail gas has no dust and harmful gas emission, so that the system meets the environmental protection requirements.

[0070] Specifically, the positive electrode sheet is manually put into the conveyor 1, the conveyor 1 uniformly delivers the material to the single-shaft shredder 201, and the shredded material is uniform in size and free of agglomeration. Subsequently, the material enters the grinding and powder removal main machine 202, and the ground and powder-removed material is divided into light material and heavy material, the heavy material being a mixture of aluminum material and a small amount of black powder, which enters the screening device 9, and the aluminum particles and black powder are screened out, the black powder enters the first sending bin 301, and the aluminum particles enter the second sending bin 302. The first vacuum pump 313 is started to generate negative pressure vacuum, and the aluminum material is sucked into the first vacuum conveying device 312, which has the functions of material suction and discharge, and after discharge, the material enters the aluminum bin 7. At the same time, the light material is respectively sent into the cyclone collector 501 and the pulse collector 502 by pneumatic conveying, and enters the third sending bin 303 and the fourth sending bin 304, respectively. The dust collected by the pulse dust collector 504 enters the sixth sending bin 306. Next, the third vacuum pump 311 is started to generate negative pressure vacuum, and the black powder in the sending bin is sucked into the third vacuum conveying device 310, and after discharge of the third vacuum conveying device 310, the black powder enters the black powder buffer bin 307. The black powder in the black powder buffer bin 307 enters the pyrolysis furnace feeder 401 and is sent into the pyrolysis rotary furnace 402, which works in a nitrogen atmosphere. The tail gas and dust generated during the pyrolysis process enter the high-temperature dust collector 505 together, and the dust is left in the high-temperature dust collector 505 and then enters the fifth sending bin 305. Subsequently, the dust is sucked into the second vacuum conveying device 308, and after discharge of the second vacuum conveying device 308, the black powder again enters the black powder buffer bin 307. The tail gas after dust removal enters the tail gas treatment system 6, and is treated in turn by the incinerator 601, the quenching tower 602, the first spray tower 603, the second spray tower 604, the demister 605 and the activated carbon adsorption tower 606, and then is sucked out by the tail gas high-pressure fan 607 and discharged through the tail gas chimney 608. The material after pyrolysis enters the cooling equipment 403, and after cooling, the black powder is sucked into the fourth vacuum conveying device 314, and after discharge of the fourth vacuum conveying device 314, the black powder enters the black powder bin for collection. In addition, the tail gas discharged by the vacuum pump is treated by the pulse dust collector 504 and then discharged through the exhaust chimney 600. This series of steps ensures that the entire system is efficient, dust-free, low-energy and environmentally friendly.

[0071] The utility model relates to technical scheme through the process of beating powder and pyrolysis, ensure that the positive pole piece material and base material separate thoroughly, avoid the volatilization and degradation of material in the high temperature pyrolysis process, reduce material loss, improve material recovery rate.The system is mainly divided into two stages: in the powder removal stage, the conveyor 1 is continuously conveyed to the single shaft shredder 201 with the recovered positive pole piece, and the positive pole piece is shredded into blocks through the single shaft shredder 201, and then the further grinding of the shredded material is carried out through the grinding powder removal host 202, so that the positive pole piece material and base material separate thoroughly, and light material (black powder) and heavy material (aluminum material mixed with part of black powder) are generated; through the multi-stage trapping of the cyclone collector 501 and the pulse collector 502, the black powder in the light material is further collected, and the recovery rate is improved; the material high-pressure fan 503 provides high-pressure air required for pneumatic conveying, to ensure efficient transmission of the material in the conveying process; through the screening device 9 and the separation mode of multiple sending bins, the purity of the positive pole piece material is ensured; the conveying system conveys the black powder and aluminum particles from each sending bin to the target storage bin through negative pressure, to ensure that the material does not produce dust in the transmission process, and to keep the working environment clean; the aluminum bin 7 stores the aluminum particles conveyed by the conveying system, for further processing or sales; the black powder buffer bin 307 stores the black powder conveyed by the conveying system, for feeding into the pyrolysis furnace feeder 401. In the pyrolysis stage, the pyrolysis furnace feeder 401 continuously conveys the black powder into the pyrolysis rotary furnace 402, to ensure stable and continuous pyrolysis process; the organic matter in the black powder is decomposed through high-temperature pyrolysis of the pyrolysis rotary furnace 402; the dust generated in the conveying process is trapped through the high-temperature dust collector 505 and the pulse dust collector 504, to ensure the cleanliness of the conveying process; the black powder after pyrolysis is cooled through the cooling equipment 403, to ensure that the material temperature is reduced to a safe range; the black powder bin 8 stores the cooled black powder, for further processing or sales. Compared with the prior art, the positive pole piece powder beating and pyrolysis recovery system provided by the utility model embodiment adopts the mode of first crushing the pole piece material, beating and powder removing, grinding and powder removing, collecting the black powder falling from the pole piece, and then pyrolyzing the collected material, cooling and packaging the pyrolyzed material, which can improve the pyrolysis efficiency, reduce energy consumption, and improve the pole piece material recovery rate and product purity.

[0072] The above description of disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positive electrode tab pre-pulverization and pyrolysis recycling system, characterized in that, include: Conveyor (1), the conveyor (1) is used to transport the recovered positive electrode sheet; A crushing system (2) connected to the conveyor (1); A screening device (9) connected to the crushing system (2); A first sending chamber (301) connected to the screening device (9) is used to temporarily store the separated black powder; A third vacuum delivery system (33) connected to the first delivery chamber (301); A second sending chamber (302) connected to the screening device (9) is used to temporarily store the separated aluminum particles; A first vacuum conveying system (31) connected to the second sending chamber (302); An aluminum chamber (7) connected to the first vacuum conveying system (31); A black powder collection system (51) connected to the pulverizing system (2); A tail gas dust treatment system (53) connected to the black powder collection system (51). A sixth sending chamber (306) is connected to the exhaust gas dust treatment system (53), the sixth sending chamber (306) is used to temporarily store the black powder separated by dust removal; the sixth sending chamber (306) is also connected to the third vacuum conveying system (33); The third sending chamber (303) and the fourth sending chamber (304) are connected to the black powder collection system (51), and the third sending chamber (303) and the fourth sending chamber (304) are used to temporarily store the collected black powder; the third sending chamber (303) and the fourth sending chamber (304) are both connected to the third vacuum conveying system (33); The black powder buffer chamber (307) is connected to the third vacuum conveying system (33). A pyrolysis system (4) connected to the black powder buffer (307); A second vacuum conveying system (32) connected to the black powder buffer (307); A tail gas dust treatment system (52) connected to the pyrolysis system (4); A fifth sending chamber (305) is connected to the exhaust gas dust treatment system (52), the fifth sending chamber (305) is used to temporarily store the black powder separated by dust removal; the fifth sending chamber (305) is also connected to the second vacuum conveying system (32); Material handling system (10) connected to the pyrolysis system (4); A fourth vacuum conveying system (34) connected to the material handling system (10); The black powder hopper (8) is connected to the fourth vacuum conveying system (34).

2. The anode tab pre-pulverization and pyrolysis recycling system according to claim 1, characterized in that, The pulverizing system (2) includes: A single-shaft shredder (201) connected to the conveyor (1) is used to shred the positive electrode sheet into blocks; A grinding and de-powdering host (202) is connected to the single-shaft shredder (201), which is used to grind the shredded positive electrode sheet into a mixture of aluminum particles and black powder.

3. The anode tab pre-pulverization and pyrolysis recycling system according to claim 1, characterized in that, The pyrolysis system (4) includes: A pyrolysis furnace feeder (401) connected to the black powder buffer bin (307) is used for continuously conveying black powder; A pyrolysis rotary furnace (402) in communication with the pyrolysis furnace feeder (401), the pyrolysis rotary furnace (402) being used for decomposing organic matters in the black powder.

4. The anode tab pre-pulverization and pyrolysis recycling system according to claim 3, characterized in that, The material processing system (10) comprises: A cooling device (403) connected to the pyrolysis rotary furnace (402), the cooling device (403) being used for cooling the black powder after pyrolysis; Wherein, the black powder is transported to the black powder bin (8) through the fourth vacuum conveying system (34) after being cooled in the cooling device (403).

5. The anode tab pre-pulverization and pyrolysis recycling system according to claim 4, characterized in that, Further comprising: A nitrogen supply system connected to the pyrolysis rotary furnace (402), the nitrogen supply system being used for continuously supplying nitrogen to the pyrolysis rotary furnace (402).

6. The anode tab pre-pulverization and pyrolysis recycling system according to claim 5, characterized in that, The tail gas dust treatment system (52) comprises: a high-temperature dust collector (505) connected to the pyrolysis system (4), the high-temperature dust collector (505) being used for recovering black powder in the tail gas generated by pyrolysis and the dust generated in the pyrolysis process.

7. The anode tab pre-pulverization and pyrolysis recycling system of claim 1, wherein, The black powder capturing system (51) comprises: A cyclone collector (501) connected to the crushing system (2), the cyclone collector (501) being used for capturing black powder in the conveying process; the cyclone collector (501) is also connected to the third sending bin (303); A pulse collector (502) in communication with the cyclone collector (501), the pulse collector (502) being used for capturing black powder in the conveying process; the pulse collector (502) is also connected to the fourth sending bin (304); A material high-pressure fan (503) connected to the pulse collector (502), the material high-pressure fan (503) being used for providing high-pressure air, and the airflow generated by the high-pressure air blows the black powder into the cyclone collector (501).

8. The positive electrode tab first-pulverizing-and-then-pyrolyzing recovery system according to claim 7, characterized in that, The first vacuum conveying system (31) comprises: A first vacuum conveying device (312) connected to the aluminum bin (7); A first vacuum pump (313) connected to the first vacuum conveying device (312); The second vacuum conveying system (32) comprises: A second vacuum conveying device (308) connected to the fifth sending bin (305); A second vacuum pump (309) connected to the second vacuum conveying device (308); The third vacuum conveying system (33) comprises: A third vacuum conveying device (310) connected to the first sending bin (301), the third sending bin (303), the fourth sending bin (304), and the sixth sending bin (306); A third vacuum pump (311) connected to the third vacuum conveying device (310); The fourth vacuum conveying system (34) comprises: A fourth vacuum conveying device (314) connected to the black powder bin (8); A fourth vacuum pump (315) connected to the fourth vacuum conveying device (314).

9. The anode tab pre-pulverization and pyrolysis recycling system according to claim 8, characterized in that, The tail gas dust treatment system (53) comprises: A pulse dust collector (504) connected with the material high-pressure fan (503); the pulse dust collector (504) is used for recycling black powder in tail gas generated by the first vacuum pump (313), the second vacuum pump (309), the third vacuum pump (311) and the fourth vacuum pump (315); An exhaust chimney (600) connected with the pulse dust collector (504), the exhaust chimney (600) is used for discharging tail gas treated by the pulse dust collector (504).

10. The anode tab pre-pulverization and pyrolysis recycling system of claim 6, wherein, Further comprising: A tail gas treatment system (6) connected with the high-temperature dust collector (505).

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