CN221198002U - Rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode material - Google Patents
Rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode material Download PDFInfo
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- CN221198002U CN221198002U CN202322311588.XU CN202322311588U CN221198002U CN 221198002 U CN221198002 U CN 221198002U CN 202322311588 U CN202322311588 U CN 202322311588U CN 221198002 U CN221198002 U CN 221198002U
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000005253 cladding Methods 0.000 title claims abstract description 44
- 239000010439 graphite Substances 0.000 title claims abstract description 36
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 36
- 239000010406 cathode material Substances 0.000 title claims abstract description 9
- 238000003763 carbonization Methods 0.000 title claims description 38
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 100
- 239000003546 flue gas Substances 0.000 claims abstract description 100
- 238000010438 heat treatment Methods 0.000 claims abstract description 66
- 239000000428 dust Substances 0.000 claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 58
- 239000003345 natural gas Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 20
- 238000007664 blowing Methods 0.000 claims description 16
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims 1
- 230000005494 condensation Effects 0.000 claims 1
- 238000010000 carbonizing Methods 0.000 abstract description 23
- 239000010405 anode material Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 10
- 239000000446 fuel Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 abstract description 2
- 230000002588 toxic effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 35
- 239000000779 smoke Substances 0.000 description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000005469 granulation Methods 0.000 description 8
- 230000003179 granulation Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000010426 asphalt Substances 0.000 description 5
- 239000007773 negative electrode material Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 2
- 231100000315 carcinogenic Toxicity 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000005087 graphitization Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009656 pre-carbonization Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011331 needle coke Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a rotary kiln for cladding, cladding and carbonizing graphite cathode materials, which comprises a kiln body, a heating furnace body for providing heat for the kiln body, and a dust remover, wherein the kiln body is connected with a flue gas inlet of the dust remover through a first flue gas pipeline for delivering flue gas exhausted from the kiln body to the dust remover, and a flue gas outlet of the dust remover is connected with the heating furnace body through a second flue gas pipeline for delivering flue gas exhausted from the dust remover to the heating furnace body for burning so as to provide heat. According to the rotary kiln for coating, coating and carbonizing the graphite anode material, the combustible flue gas containing volatile matters generated in the coating, granulating and carbonizing processes of the graphite anode material is introduced into the heating furnace body to be used as fuel, so that on one hand, the heat value in the flue gas is recovered, the energy consumption of the graphite anode material in the coating, granulating and carbonizing processes is greatly reduced, on the other hand, the treatment of toxic components in the flue gas is realized, and the investment of an environment-friendly flue gas treatment device is reduced.
Description
Technical Field
The utility model belongs to the field of battery materials, and particularly relates to a preparation device of a negative electrode material.
Background
At present, graphite anode materials used in the lithium ion battery industry on a large scale are generally subjected to cladding granulation before graphitization so as to improve electrochemical performance, and carbonization is adopted to reduce material volatile matters and improve material tap density so as to improve material loading and operation safety of graphitization chemical industry. The traditional graphite negative electrode material of the lithium ion battery is coated, granulated and carbonized by the following specific operations: firstly, petroleum coke/needle coke and asphalt are respectively crushed into 8-10 microns and 2-3 microns by a crushing device; mixing the two materials according to a certain proportion, controlling the reaction temperature of the materials, and finishing softening and melting of asphalt, coating of focusing powder and partial carbonization of asphalt; and then the coated product is further heated to further decompose and carbonize the aromatic hydrocarbon in the asphalt.
When the rotary kiln is used for preparing the graphite cathode material, flue gas is generated in the coating granulation and carbonization processes, volatile matters contained in the flue gas are combustible gas with high heat value, and meanwhile, the flue gas is also carcinogenic toxic gas containing benzopyrene and the like. At present, most of the flue gas is sent into an incinerator for incineration treatment, the flue gas incineration temperature is 800-1100 ℃, the incineration tail gas is discharged or desulphurized after being subjected to water spraying, humidification and temperature reduction, a large amount of flue gas combustion heat is wasted and not effectively utilized, and even if the incineration tail gas is utilized after heat exchange, the heat utilization rate is not high. And enterprises can directly empty the flue gas containing volatile matters after condensing the flue gas with water and then electrically carrying out coke-capturing treatment, and the captured tar and asphalt are treated outside the critical waste water, so that the treatment cost of the treatment mode is high, and the production cost is increased.
Disclosure of utility model
The utility model aims to overcome the defects and the shortcomings in the background art, and provides a graphite anode material cladding, cladding carbonization or rotary kiln for carbonization, which can fully utilize volatile matters in flue gas as fuel to reduce fuel cost. In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
The utility model provides a graphite negative pole material cladding, cladding carbomorphism or rotary kiln that carbomorphism was used, includes the kiln body and is used for to the kiln body provides thermal heating furnace body, still includes the dust remover, the kiln body is through one be used for with kiln body inside exhaust flue gas send to the first flue gas pipeline of dust remover with the flue gas entry of dust remover links to each other, the flue gas export of dust remover is through one be used for with dust remover exhaust flue gas send to the heating furnace body burns in order to provide thermal second flue gas pipeline with the heating furnace body links to each other.
In the rotary kiln for cladding, cladding and carbonizing or carbonizing the graphite anode material, preferably, the dust remover is a filter element filtering type flue gas dust remover (high temperature resistant) for reducing the dust content in the flue gas to below 30mg/Nm 3. If the dust content in the flue gas is not controlled, the flue gas conveying pipeline, the burner and other combustion components are blocked, normal work cannot be performed, dust loss can be caused by directly using the flue gas as fuel without dust removal, and the dust is a material in the rotary kiln, so that the recovery rate of products is low. The preferable research shows that the effect is better when the dust content in the flue gas is reduced to below 30mg/Nm 3.
In the rotary kiln for cladding, cladding carbonization or carbonization of the graphite anode material, preferably, the filter element filtering type flue gas dust remover comprises a shell, a filter element and a heating device for preventing flue gas in the shell from condensing, and the filter element is arranged in the shell. By arranging the heating device, the flue gas can be prevented from condensing tar in the dust remover to block the filter core, the operation temperature of the dust remover can be 150-500 ℃, preferably 300-400 ℃, the heating device can be an external jacket heater, an internal electric heater, an internal heat exchange tube heater and the like, more preferably, the heat source of the heating device is from the heat exchanger, and the high-temperature incineration tail gas of the incinerator is fully utilized. The filter element can be a high-temperature resistant fiber filter bag, a metal sintering filter bag, a metal wire mesh filter cylinder and the like.
In the rotary kiln for cladding, cladding and carbonizing or carbonizing the graphite anode material, preferably, a back-blowing air path for back-blowing and ash cleaning the filter element is further arranged above the shell, and a heating air bag for heating the back-blowing air is arranged on the back-blowing air path; and a dust recycling pipeline is arranged below the shell and is connected with the kiln body. The gas in the back blowing gas path can be nitrogen, pulse blowing ash removal is carried out by adopting a nitrogen dust remover, and the nitrogen is heated to 150-400 ℃ by adopting a heating gas bag so as to prevent tar in smoke from condensing and blocking a filter element due to cold nitrogen back blowing.
In the rotary kiln for cladding, cladding carbonization or carbonization of the graphite anode material, preferably, the heating furnace body is provided with a natural gas burner and a smoke burner, the natural gas burner is connected with a natural gas pipeline, and the smoke burner is connected with a second smoke pipeline.
In the rotary kiln for cladding, cladding carbonization or carbonization of the graphite anode material, preferably, a natural gas burner is arranged on the heating furnace body, a natural gas pipeline is connected to the natural gas burner, and the second flue gas pipeline is connected with the natural gas pipeline.
The two flue gas utilization modes can be adopted, one mode is to directly add a flue gas burner to directly burn flue gas for supplying heat, the mode can avoid the influence on the natural gas burner as much as possible, and the other mode is to directly integrate the flue gas into a natural gas pipeline for mixing the flue gas with the natural gas for use. The specific operation mode can be determined by considering the site condition and the smoke condition. The natural gas burner and the flue gas burner can be conventional products, such as energy-saving burners, such as a regenerative burner, a radial burner and the like, are adopted as the natural gas burner, and the regenerative burner is preferred in a high-temperature area. Combustion air can be introduced into the burner.
In the rotary kiln for cladding, cladding and carbonizing or carbonizing the graphite anode material, preferably, the rotary kiln further comprises an incinerator, the second flue gas pipeline is connected with the incinerator through a third flue gas pipeline for enabling redundant flue gas to enter the incinerator, the incinerator is provided with an incineration tail gas outlet, and the incineration tail gas outlet is connected with a heat exchanger. The incinerator may be a direct-fired incinerator (TO) or a regenerative incinerator (RTO) incinerator, and is preferably a direct-fired incinerator.
In the rotary kiln for cladding, cladding carbonization or carbonization of the graphite anode material, preferably, auxiliary heating devices are arranged on the first flue gas pipeline, the second flue gas pipeline and the third flue gas pipeline, and the heat exchanger is connected with the auxiliary heating devices. The auxiliary heating device is arranged on the flue gas pipeline to prevent tar and the like in the flue gas from cooling, condensing and blocking the pipeline, and a heat source of the auxiliary heating device can preferably adopt a heat medium in a heat exchanger.
In the rotary kiln for cladding, cladding and carbonizing or carbonizing the graphite cathode material, preferably, the incineration tail gas outlet is connected with the heat exchanger for heat exchange and then is converged with the tail gas outlet of the heating furnace body to form a tail gas pipeline, and the tail gas pipeline is sequentially connected with the desulfurization device and the activated carbon adsorption device. The desulfurization device for desulfurizing the incineration tail gas and the combustion tail gas of the heating furnace body can adopt a lime gypsum method and a double-alkali method for desulfurization, the small device adopts the double-alkali method for desulfurization preferentially, and the large device adopts the lime gypsum method for desulfurization preferentially. And deeply purifying the desulfurized tail gas by an active carbon adsorption device and then discharging.
For materials with higher volatile content, the combustion heat of volatile smoke is rich, and redundant combustible smoke can be sent into an incinerator for incineration, and the incineration tail gas is subjected to heat exchange by a heat exchanger for waste heat utilization. Specifically, the heat exchanger comprises a hot gas inlet, a cold gas outlet, a cold medium inlet and a heat medium outlet, wherein the incineration tail gas outlet is connected with the hot gas inlet and used for providing heat for the heat exchanger and heating the cold medium added from the cold medium inlet to obtain the heat medium, and the heat medium is discharged from the heat medium outlet and used for providing heat for other devices, such as providing heat for an auxiliary heating device, providing heat for a heating device of a dust remover or used for drying raw materials. The incineration tail gas enters the heat exchanger to be changed into cold gas after heat exchange, the cold gas is discharged from the cold gas outlet, finally, a tail gas pipeline is collected with the combustion tail gas of the heating furnace body, and the subsequent procedures of desulfurization and the like are carried out.
In the rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode materials, preferably, the kiln body comprises a barrel and kiln tail boxes and kiln head boxes arranged on two sides of the barrel, the heating furnace body is arranged on the outer wall of the barrel, the first flue gas pipeline is connected with the kiln tail boxes, the kiln tail boxes are connected with feeding devices, the feeding devices sequentially comprise a vacuum feeder, a buffering bin, a weighing metering unit and a screw feeder according to material flow directions, the barrel is sequentially divided into a cladding material making section, a carbonization section and a cooling section according to material flow directions, and the kiln head boxes are sequentially connected with a cooler and a discharging device. The cylinder body is provided with a transmission mechanism.
In the rotary kiln for cladding, cladding carbonization or carbonization of the graphite anode material, preferably, fans can be selectively arranged in each pipeline, for example, a smoke fan is arranged in the second smoke pipeline.
The volatile smoke generated in the process of coating granulation and carbonization of the graphite anode material is a combustible gas with high heat value (about 35530kJ/Nm 3) and is also a cancerogenic toxic gas containing benzopyrene and the like. For the characteristic of the volatile smoke generated by coating granulation and carbonization, taking continuous pre-carbonization as an example, when the volatile of the raw material is about 6%, the combustion of the volatile smoke generated by pre-carbonization can meet the requirement of more than 50% of the heat required by coating granulation and carbonization. According to the utility model, the volatile smoke generated in the process of coating and granulating the graphite negative electrode material and carbonizing is introduced into a dust remover to be purified and removed, and then is sent into a heating furnace body to be used as combustible gas, and the combustible gas is burnt to provide heat for externally heating the rotary kiln, so that the effective recycling of the heat value of the volatile smoke released in the process of coating and granulating the graphite negative electrode material and carbonizing is realized, the toxic gas treatment is realized, the energy consumption in the process of coating and carbonizing the graphite negative electrode material of the lithium ion battery is greatly reduced, and the investment of a smoke environment-friendly treatment device is reduced.
Compared with the prior art, the utility model has the advantages that:
1. According to the rotary kiln for coating, coating and carbonizing the graphite anode material, combustible smoke containing volatile matters generated in the process of coating, granulating and carbonizing the graphite anode material is introduced into the heating furnace body to be used as fuel, so that on one hand, the heat value in the smoke is recovered, on the other hand, the energy consumption of the graphite anode material in the process of coating, granulating and carbonizing is greatly reduced, on the other hand, the treatment of toxic components in the smoke is realized, the investment of a smoke environment-friendly treatment device is reduced, and both the fuel cost and the smoke treatment cost are improved.
2. According to the rotary kiln for coating, coating carbonization or carbonization of the graphite anode material, combustible smoke containing volatile matters generated in the process of coating granulation and carbonization of the graphite anode material is introduced into the heating furnace body to be used as fuel.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a graphite anode material coated, coated carbonized or rotary kiln for carbonization in example 1.
Fig. 2 is a schematic structural view of the dust remover in embodiment 1.
Fig. 3 is a schematic structural diagram of a graphite anode material coated, coated carbonized or rotary kiln for carbonization in example 2.
Legend description:
1. A vacuum feeder; 2. buffering bin; 3. a weighing and metering unit; 4. a screw feeder; 5. a kiln tail box; 6. a cylinder; 7. a transmission mechanism; 8. heating the furnace body; 9. an auxiliary heating device; 10. a kiln head box; 12. a dust remover; 121. a housing; 122. a filter element; 123. a heating device; 124. heating the air bag; 13. a flue gas fan; 14. a natural gas burner; 15. a flue gas burner; 16. a shower pipe; 17. a cooling machine; 19. an incinerator; 20. a heat exchanger; 22. a desulfurizing device; 23. an activated carbon adsorption device; 101. a first flue gas duct; 102. a second flue gas duct; 103. a third flue gas duct; 104. a back-blowing air path; 105. a dust recycling pipeline; 106. and a tail gas pipeline.
Detailed Description
The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present utility model are commercially available or may be prepared by existing methods.
Example 1:
As shown in fig. 1, the rotary kiln for cladding, cladding and carbonizing or carbonizing graphite cathode materials of this embodiment includes a kiln body and a heating furnace body 8 (specifically, the heating furnace body 8 may be disposed on an outer wall of the cylinder 6) for providing heat to the interior of the kiln body, and further includes a dust remover 12, wherein the kiln body is connected to a flue gas inlet of the dust remover 12 through a first flue gas pipe 101 for delivering flue gas exhausted from the interior of the kiln body to the dust remover 12, and a flue gas outlet of the dust remover 12 is connected to the heating furnace body 8 through a second flue gas pipe 102 for delivering flue gas exhausted from the dust remover 12 to the heating furnace body 8 for burning to provide heat.
In this embodiment, the dust collector 12 is a high temperature resistant filter element filter type flue gas dust collector for reducing dust in flue gas from 10-20g/Nm 3 to 30mg/Nm 3. Specifically, as shown in fig. 2, the high temperature resistant filter element filtering type flue gas dust remover comprises a housing 121, a filter element 122 and a heating device 123 for preventing flue gas in the housing 121 from condensing, wherein the filter element 122 is arranged in the housing 121. A back-blowing gas path 104 (nitrogen can be adopted) for back-blowing and ash cleaning of the filter element 122 is arranged above the shell 121, and a heating gas bag 124 for heating the back-blowing gas is arranged on the back-blowing gas path 104; a dust recycling pipeline 105 is arranged below the shell 121, and the dust recycling pipeline 105 is connected with the kiln tail box 5 of the kiln body. The heat source of the heating device 123 may be from the heat exchanger 20, and the filter element 122 may be a high temperature resistant fiber filter bag, a metal sintering filter bag, a wire mesh filter cartridge, or the like.
In this embodiment, a natural gas burner 14 and a flue gas burner 15 are arranged on the heating furnace body 8, a natural gas pipeline is connected to the natural gas burner 14, the flue gas burner 15 is connected to the second flue gas pipeline 102, and a flue gas fan 13 is arranged on the second flue gas pipeline 102.
In this embodiment, the rotary kiln further comprises an incinerator 19, the second flue gas duct 102 is connected to the incinerator 19 through a third flue gas duct 103 for introducing excess flue gas into the incinerator 19, the incinerator 19 is provided with an incineration exhaust outlet, and the incineration exhaust outlet is connected to a heat exchanger 20.
In this embodiment, the auxiliary heating device 9 is disposed on each of the first flue gas pipeline 101, the second flue gas pipeline 102 and the third flue gas pipeline 103, and the heat exchanger 20 is connected to the auxiliary heating device 9. The heat source of the auxiliary heating device 9 may be from the heat exchanger 20.
In this embodiment, the incineration exhaust outlet exchanges heat with the exhaust outlet of the heating furnace body 8 through the connection heat exchanger 20 and then is converged to an exhaust pipeline 106, and the exhaust pipeline 106 is sequentially connected with the desulfurization device 22 and the activated carbon adsorption device 23.
In this embodiment, the kiln body includes barrel 6 and locates kiln tail case 5, kiln head case 10 of barrel 6 both sides, and the outer wall of barrel 6 is located to heating furnace body 8, and first flue gas pipeline 101 links to each other with kiln tail case 5, is connected with feeding device on the kiln tail case 5, and feeding device includes vacuum feeder 1, buffering feed bin 2, weighing measurement unit 3 and screw feeder 4 in proper order according to the material flow direction, and barrel 6 divide into cladding material section, carbonization section and cooling section according to the material flow direction in proper order, is equipped with shower 16 on the cooling section, is equipped with drive mechanism 7 on the barrel 6, has connected gradually cooler 17 and discharging device on the kiln head case 10.
The graphite cathode material of the embodiment is used for cladding, cladding and carbonizing or a rotary kiln for carbonizing, in a continuous cladding and granulating rotary kiln with phi 1600 multiplied by 30000mm adopting heat accumulating type burner external heating, the feeding amount of the material is 800kg/h, the volatile content of the raw material is 6.3 percent (mass fraction), the temperature of three temperature areas of cladding and granulating are 300 ℃, 450 ℃ and 650 ℃, the carbonizing section is 950 ℃, and the total residence time of the material heating section is 240min. The fume with the dust content of 10-20g/Nm 3 volatile matters is introduced into the heating furnace body 8 to be used as fuel after being dedusted to the fume with the dust content of less than or equal to 30mg/Nm 3 at high temperature, the volatile matters content of the carbonized material finished products is less than or equal to 0.8 percent, and the tap density is more than or equal to 0.88g/cm 3. The natural gas consumption of the continuous coating granulation and carbonization rotary kiln is less than or equal to 30Nm 3/t.
And the flue gas containing volatile matters is not introduced into the heating furnace body 8 to be used as fuel, and the natural gas consumption of the continuous cladding granulation and carbonization rotary kiln is about 100Nm 3/t of product.
Example 2:
As shown in fig. 3, the rotary kiln for cladding, cladding carbonization or carbonization of the graphite anode material of this embodiment differs from that of embodiment 1 in that: the heating furnace body 8 is provided with a natural gas burner 14, the natural gas burner 14 is connected with a natural gas pipeline, and the second flue gas pipeline 102 is connected with the natural gas pipeline. Other structures may be the same as embodiment 1.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode materials comprises a kiln body and a heating furnace body (8) for providing heat for the kiln body, and is characterized by further comprising a dust remover (12), wherein the kiln body is connected with a flue gas inlet of the dust remover (12) through a first flue gas pipeline (101) for conveying flue gas exhausted from the interior of the kiln body to the dust remover (12), and a flue gas outlet of the dust remover (12) is connected with the heating furnace body (8) through a second flue gas pipeline (102) for conveying flue gas exhausted from the dust remover (12) to the heating furnace body (8) for burning so as to provide heat.
2. Rotary kiln according to claim 1, characterized in that the dust separator (12) is a filter element filter type flue gas dust separator for reducing the dust content of the flue gas to below 30mg/Nm 3.
3. The rotary kiln according to claim 2, characterized in that the cartridge filter type flue gas dust remover comprises a housing (121), a cartridge (122) and a heating device (123) for preventing condensation of flue gas inside the housing (121), the cartridge (122) being provided inside the housing (121).
4. A rotary kiln according to claim 3, characterized in that a back-blowing air path (104) for back-blowing ash removal of the filter element (122) is arranged above the shell (121), and a heating air bag (124) for heating the back-blowing air is arranged on the back-blowing air path (104); a dust recycling pipeline (105) is arranged below the shell (121), and the dust recycling pipeline (105) is connected with the kiln body.
5. Rotary kiln according to any one of claims 1-4, characterized in that the heating furnace body (8) is provided with a natural gas burner (14) and a flue gas burner (15), the natural gas burner (14) is connected with a natural gas pipeline, and the flue gas burner (15) is connected with the second flue gas pipeline (102).
6. Rotary kiln according to any one of claims 1-4, characterized in that the heating furnace body (8) is provided with a natural gas burner (14), the natural gas burner (14) is connected with a natural gas pipeline, and the second flue gas pipeline (102) is connected with the natural gas pipeline.
7. Rotary kiln according to any one of claims 1-4, characterized in that the rotary kiln further comprises an incinerator (19), the second flue gas duct (102) being connected to the incinerator (19) by means of a third flue gas duct (103) for letting excess flue gas into the incinerator (19), the incinerator (19) being provided with an incineration exhaust outlet, the incineration exhaust outlet being connected to a heat exchanger (20).
8. The rotary kiln according to claim 7, characterized in that the first flue gas duct (101), the second flue gas duct (102) and the third flue gas duct (103) are each provided with an auxiliary heating device (9), and the heat exchanger (20) is connected to the auxiliary heating device (9).
9. The rotary kiln according to claim 7, wherein the incineration exhaust outlet is connected with the heat exchanger (20) for exchanging heat and then is converged with the exhaust outlet of the heating furnace body (8) to an exhaust pipeline (106), and the exhaust pipeline (106) is sequentially connected with a desulfurization device (22) and an activated carbon adsorption device (23).
10. The rotary kiln according to any one of claims 1-4, wherein the kiln body comprises a barrel (6) and kiln tail boxes (5) and kiln head boxes (10) arranged on two sides of the barrel (6), the heating furnace body (8) is arranged on the outer wall of the barrel (6), the first flue gas pipeline (101) is connected with the kiln tail boxes (5), the kiln tail boxes (5) are connected with feeding devices, the feeding devices sequentially comprise a vacuum feeder (1), a buffer bin (2), a weighing metering unit (3) and a screw feeder (4) according to the material flow direction, the barrel (6) sequentially comprises a coating material making section, a carbonization section and a cooling section according to the material flow direction, and the kiln head boxes (10) sequentially are connected with a cooler (17) and a discharging device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322311588.XU CN221198002U (en) | 2023-08-25 | 2023-08-25 | Rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322311588.XU CN221198002U (en) | 2023-08-25 | 2023-08-25 | Rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode material |
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| CN221198002U true CN221198002U (en) | 2024-06-21 |
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| CN202322311588.XU Active CN221198002U (en) | 2023-08-25 | 2023-08-25 | Rotary kiln for cladding, cladding carbonization or carbonization of graphite cathode material |
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| CN (1) | CN221198002U (en) |
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