CN114105132A - Continuous graphitization system - Google Patents
Continuous graphitization system Download PDFInfo
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- CN114105132A CN114105132A CN202111373389.0A CN202111373389A CN114105132A CN 114105132 A CN114105132 A CN 114105132A CN 202111373389 A CN202111373389 A CN 202111373389A CN 114105132 A CN114105132 A CN 114105132A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/205—Preparation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/20—Arrangements of devices for charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/21—Arrangements of devices for discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/24—Cooling arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The embodiment of the invention discloses a continuous graphitization system, which comprises the following components: the graphitization furnace is provided with a negative electrode material inlet, a negative electrode material outlet and a heat insulation material inlet; the heat insulation material conveying device is communicated with the heat insulation material inlet of the graphitization furnace; the negative electrode material conveying device is communicated with the negative electrode material inlet of the graphitization furnace; a cooling device arranged at the cathode material outlet of the graphitization furnace; and the discharging device is communicated with the cooling device. The embodiment of the invention can realize continuous graphitization of the battery cathode material, shortens the production period and improves the graphitization efficiency of the cathode material.
Description
Technical Field
The invention relates to major equipment for preparing a new energy material, belongs to the technical field of graphitization, and particularly relates to a continuous graphitization system.
Background
With the wide application of lithium ion batteries in the fields of electric vehicles and energy storage, the lithium battery industry is continuously and rapidly developed, and higher requirements are put forward on the graphitization of negative electrode materials. How to provide larger capacity, lower cost and more uniform performance for the manufacture of the cathode material and how to better adapt to the global high specification requirement on the environment is a direction for continuously adapting to the industry development and continuously improving the graphitization industry. At present, main devices for graphitizing the lithium ion battery graphite cathode material on the market are an Acheson graphitizing furnace, a tandem graphitizing furnace and the like. The graphitization process of the current devices mostly comprises: feeding, graphitization, cooling, ejection of compact, but each stage is gone on alone in same equipment mostly, also carries out graphitization again after a stove cathode material feeding is accomplished, cools off again after graphitization accomplishes, carries out the ejection of compact again after the cooling is accomplished, and graphitization process is discontinuous, and production cycle is very long, and production efficiency is low. In addition, most of the cooling of the current graphitizing furnace is natural cooling, a large amount of heat is discharged into the air, and the energy utilization rate is low; the sealing operation cannot be realized, and the centralized treatment and organized discharge of smoke and dust cannot be effectively realized, so that the inking environment is poor; the feeding and discharging of the crucible and the charging and discharging of the crucible are both manually operated, and the degree of automation is low. Moreover, the charging mode and the power transmission mode of the current graphitizing furnace and the water cooling protective electrode inevitably cause non-uniform heating temperature field, and further cause great difference in the final performance of the materials at each position.
Disclosure of Invention
In order to overcome at least some defects or shortcomings in the prior art, the embodiment of the invention provides a continuous graphitization system, which solves the problems of discontinuous graphitization process, long production period and low production efficiency in the prior art, shortens the production period and improves the production efficiency.
Specifically, an embodiment of the present invention provides a continuous graphitization system, including: the graphitization furnace is provided with a negative electrode material inlet, a negative electrode material outlet and a heat insulation material inlet; the heat insulation material conveying device is communicated with the heat insulation material inlet of the graphitization furnace; the negative electrode material conveying device is communicated with the negative electrode material inlet of the graphitization furnace; a cooling device arranged at the cathode material outlet of the graphitization furnace; the discharging device is communicated with the cooling device; the negative electrode material conveying device is used for continuously conveying a negative electrode material to be graphitized into the graphitizing furnace through the negative electrode material inlet; the graphitization furnace is used for continuously carrying out graphitization treatment on the negative electrode material to obtain a graphitized negative electrode material; the heat insulation material conveying device is used for conveying a heat insulation material to the graphitization furnace through the heat insulation material inlet so as to insulate the negative electrode material; the cooling device is used for continuously cooling the graphitized negative electrode material to obtain a cooled negative electrode material; and the discharging device is used for discharging the cooled cathode material.
In one embodiment of the present invention, the graphitization furnace includes: the furnace body is provided with a furnace body inner cavity, the cathode material outlet is arranged at the lower part of the furnace body inner cavity, and the cooling device is arranged at the lower part of the furnace body; the anode material input section is arranged at the upper part of the furnace body and provided with an input section inner cavity, the input section inner cavity is communicated with the furnace body inner cavity, the anode material inlet is arranged at the upper part of the anode material input section and is communicated with the input section inner cavity, and the input section inner cavity is communicated with the anode material conveying device through the anode material inlet; the heat insulation material containing barrel is sleeved outside the furnace body and attached to the outer wall of the furnace body, an inner cavity of the barrel is formed in the heat insulation material containing barrel, the heat insulation material inlet heat insulation material conveying device 300 is arranged on the upper portion of the inner cavity of the barrel, and the inner cavity of the barrel is communicated with the heat insulation material conveying device through the heat insulation material inlet.
In one embodiment of the present invention, the furnace body includes: the graphitizing furnace heating body is provided with a heating body inner cavity; the first graphitization furnace transition section is connected to the upper part of a heating body of the graphitization furnace through a first insulating piece, the first graphitization furnace transition section is provided with a first transition section inner cavity, the negative electrode material input section is arranged at the upper part of the first graphitization furnace transition section, and the input section inner cavity is communicated with the first transition section inner cavity; the second graphitization furnace transition section is connected to the lower part of a heating body of the graphitization furnace through a second insulating piece, the second graphitization furnace transition section is provided with a second transition section inner cavity, the first transition section inner cavity and the heating body inner cavity form the furnace body inner cavity, and the negative electrode material outlet is arranged at the lower part of the second transition section inner cavity; the resistance of the heating body of the graphitization furnace is gradually increased along the radial direction of the heating body of the graphitization furnace.
In one embodiment of the present invention, the cooling device includes an air cooling assembly including: the cooling gas containing cylinder is sleeved on the outer wall of the transition section of the second graphitization furnace and attached to the transition section of the second graphitization furnace, and is provided with a cooling gas containing cavity; a cooling gas introduction pipe provided at a lower portion of an outer wall of the cooling gas accommodating cylinder and communicating with the cooling gas accommodating cylinder; and the cooling gas delivery pipe is arranged at the upper part of the outer wall of the cooling gas containing cylinder and communicated with the cooling gas containing cylinder.
In one embodiment of the present invention, the cooling apparatus includes a first water cooling module including: the upper part of the first cooling liquid accommodating cylinder is communicated with the cathode material outlet of the graphitization furnace, and the first cooling liquid accommodating cylinder is provided with a first cooling liquid accommodating cavity; the first cooling liquid leading-in pipe is arranged at the lower part of the outer wall of the first cooling liquid accommodating cylinder and communicated with the first cooling liquid accommodating cavity; and the first cooling liquid delivery pipe is arranged on the upper part of the outer wall of the first cooling liquid accommodating barrel and communicated with the first cooling liquid accommodating cavity.
In an embodiment of the present invention, a first guide vane is disposed in the first coolant accommodating chamber, and the first guide vane is configured to guide the coolant guided from the first coolant inlet pipe to the first coolant outlet pipe; the first guide vane is a spiral guide vane.
In one embodiment of the invention, the discharging device comprises: a discharge barrel, one end of which is communicated with the lower part of the first cooling liquid containing barrel and is communicated with the anode material outlet of the graphitization furnace through the first cooling liquid containing barrel; the material discharging assembly is arranged in the discharging barrel and is used for discharging the graphitized negative electrode material through the other end of the discharging barrel; wherein, cooling device includes the second water cooling module, the second water cooling module includes: the second cooling liquid containing cylinder is sleeved outside the discharging cylinder and attached to the outer wall of the discharging cylinder, and is provided with a second cooling liquid containing cavity; the plurality of second cooling liquid leading-out pipes are arranged at the upper part of the outer wall of the second cooling liquid containing cylinder at intervals and communicated with the second cooling liquid containing cavity; the second cooling liquid leading-in pipes are arranged at the lower part of the outer wall of the second cooling liquid containing cylinder and communicated with the second cooling liquid containing cavity; a second guide vane is arranged in the second cooling liquid accommodating cavity and used for guiding the cooling liquid led in from the second cooling liquid lead-in pipe to the second cooling liquid lead-out pipe; and the two guide vanes are spiral guide vanes.
In one embodiment of the present invention, the continuous graphitization system further includes an exhaust gas derivation device, the exhaust gas derivation device including: the waste gas gathering cylinder is sleeved outside the graphitization furnace; and the waste gas guide pipe assemblies respectively penetrate through the side wall of the graphitization furnace so as to guide the waste gas in the graphitization furnace into the waste gas gathering cylinder.
In one embodiment of the present invention, the graphitization furnace is further provided with a first exhaust gas discharge port; the waste gas gathering cylinder is provided with a second waste gas outlet; the continuous graphitization system further includes a tail gas treatment device including: the incineration equipment is communicated with the first waste gas outlet and the second waste gas outlet; the desulfurization equipment is communicated with the incineration equipment; the fan is communicated with the desulfurization equipment; and the tail gas discharge pipe is communicated with the fan.
In one embodiment of the invention, the graphitization furnace is further provided with a heat insulating material outlet; the continuous graphitization system further comprises a heat preservation material recycling device, and the heat preservation material recycling device comprises: the screening equipment is provided with a screening inlet, a first screening outlet and a second screening outlet, and the screening inlet is communicated with the heat-insulating material outlet; the first material returning device is communicated between the first screening outlet and the heat-insulating material conveying device; and the second material returning device is communicated between the second screening outlet and the negative electrode material conveying device.
The technical scheme can have one or more of the following advantages and beneficial effects: according to the embodiment of the invention, the single graphitization furnace is designed into the continuous graphitization system which can continuously perform graphitization treatment and comprises the graphitization furnace, the negative electrode material conveying device, the heat insulation material conveying device, the cooling device and the discharging device, and the feeding, graphitization, cooling and discharging of the negative electrode material are synchronously performed through the cooperative operation of all the components, so that the continuity of the graphitization treatment of the negative electrode material of the lithium ion battery is realized, the problems of discontinuous graphitization process, long production period and low production efficiency in the prior art are solved, the production period is shortened, and the production efficiency is improved. Meanwhile, the energy utilization rate is improved, and the energy consumption is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a continuous graphitization system according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of the graphitization furnace in fig. 1.
FIG. 3 is a schematic view showing the relative positional relationship between the graphitization furnace, the cooling device, and the discharge device in FIG. 1.
Fig. 4 is a detailed structural view of the continuous graphitization system shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, embodiments of the present invention provide a continuous graphitization system 10. The continuous graphitization system 10 provided by the embodiment of the invention is used for realizing graphitization treatment of the lithium ion battery cathode material. The graphitization treatment process is a treatment process in the treatment process of the lithium ion battery negative electrode material. The lithium ion battery negative electrode material can be, for example, a negative electrode material precursor, that is, a negative electrode material before being subjected to graphitization treatment, and can include, for example, petroleum coke powder, needle-shaped coke powder, and a material in which petroleum coke powder or needle-shaped coke powder is used to prepare secondary particles.
Specifically, the continuous graphitization system 10 includes, for example: a graphitization furnace 100, a negative electrode material conveying device 200, a heat insulating material conveying device 300, a cooling device 400, and a discharging device 500. As shown in fig. 2, the graphitization furnace 100 is provided with a negative electrode material inlet 101, a negative electrode material outlet 103, and a heat insulating material inlet 102. The heat insulating material transfer device 300 communicates with the heat insulating material inlet 102 of the graphitization furnace 100. The anode material transfer device 200 communicates with the anode material inlet 101 of the graphitization furnace 100. The cooling device 400 is provided at the anode material outlet 103 of the graphitization furnace 100. The discharging device 500 is communicated with the cooling device 400. Wherein, the negative electrode material conveying device 200 is used for continuously conveying the negative electrode material to be graphitized into the graphitization furnace 100 through the negative electrode material inlet 101. The graphitization furnace 100 is used for continuously performing graphitization treatment on the negative electrode material to obtain a graphitized negative electrode material. The heat insulating material conveying device 300 is used for conveying a heat insulating material into the graphitization furnace 100 through the heat insulating material inlet 102 to insulate the anode material. The cooling device 400 is configured to continuously cool the graphitized negative electrode material to obtain a cooled negative electrode material. The discharging device 500 is used for discharging the cooled cathode material.
The working principle of the continuous graphitization system provided by the embodiment of the invention can be as follows: the negative electrode material conveying device 200 continuously conveys the negative electrode material to be graphitized into the graphitization furnace 100 through the negative electrode material inlet 101, and the graphitization furnace 100 continuously conducts graphitization treatment on the negative electrode material to obtain a graphitized negative electrode material; the heat insulating material conveying device 300 conveys a heat insulating material into the graphitization furnace 100 through the heat insulating material inlet 102 so as to insulate the heat of the negative electrode material during the graphitization treatment of the negative electrode material; the cooling device 400 continuously cools the graphitized negative electrode material to obtain a cooled negative electrode material. The discharging device 500 discharges the cooled cathode material.
By controlling the speed of the cathode material conveying device 200, the heat insulating material conveying device 300, the graphitization furnace 100, the discharging device 500, the cooling system 400 and the like, the whole continuous graphitization system can continuously perform graphitization treatment on the cathode material, so that the situation that the graphitizing treatment furnace waits for one furnace after feeding one furnace and then cools the furnace and finally discharges the graphitized cathode material as in the graphitization furnace in the prior art is not needed. The continuous graphitization system provided by the embodiment of the invention can realize synchronous feeding, graphitization, cooling and discharging,
in the embodiment of the invention, a single graphitization furnace is designed into the continuous graphitization system 10 which can continuously perform graphitization treatment and comprises the graphitization furnace 100, the negative electrode material conveying device 200, the heat insulation material conveying device 300, the cooling device 400 and the discharging device 500, and the feeding, graphitization, cooling and discharging of the negative electrode material are synchronously performed through the cooperative operation of all the components, namely, the graphitization treatment continuity of the negative electrode material of the lithium ion battery is realized, so that the problems of discontinuous graphitization process, long production period and low production efficiency in the prior art are solved, the production period is shortened, and the production efficiency is improved. Meanwhile, the energy utilization rate is improved, and the energy consumption is reduced.
Specifically, as shown in fig. 1 and 2, the graphitization furnace 100 is a main apparatus for graphitization treatment of the anode material, and may be, for example, a cylindrical tubular structure, a square tubular structure, or the like, preferably a cylindrical tubular structure. The graphitization furnace 100 includes, for example, a furnace body 110, a negative electrode material input section 120, and a heat insulating material accommodating cylinder 130.
As shown in fig. 2, the furnace body 110 is a heating device. Be provided with the furnace body inner chamber in the furnace body 110, the furnace body inner chamber is used for holding the negative pole material to supply the negative pole material to carry out graphitization in furnace body 110. The cathode material outlet 103 is arranged at the lower part of the inner cavity of the furnace body. The furnace body 110 may be, for example, a cylindrical tubular structure disposed in the vertical direction, and a furnace body cavity is disposed in the interior of the cylindrical tubular structure.
The cathode material input section 120 is an inverted cone-shaped part with a hollow interior, and is arranged and connected to the upper portion of the furnace body 110, an input section inner cavity 121 is arranged in the cathode material input section 120, the input section inner cavity 121 is communicated with the furnace body inner cavity, the cathode material inlet 101 is arranged on the upper portion of the cathode material input section 120 and is communicated with the input section inner cavity 121, and the input section inner cavity 121 is communicated with the cathode material conveying device 200 through the cathode material inlet 101. The negative electrode material enters through the negative electrode material inlet 101 and reaches the inner cavity of the furnace body 110 through the inner cavity 121 of the input section of the negative electrode material input section 120 to be graphitized, namely, the negative electrode material is heated and treated at high temperature, wherein the temperature range is 1000-3300 ℃. Preferably, a material guiding member (also called a material distributing member) 122 is further disposed in the anode material input section 120. The material guiding member 122 is, for example, an inverted cone-shaped component, and is configured to guide the negative electrode material entering the negative electrode material input section 120 to the outer edge of the inner cavity of the furnace body 110, so that the negative electrode material is not accumulated in the middle of the inner cavity of the furnace body, and the graphitization effect can be improved.
The heat insulating material accommodating cylinder 130 is, for example, a hollow cylindrical member. The thermal insulation material accommodating cylinder 130 is provided with a cylinder inner cavity 131 for accommodating thermal insulation material. The heat insulation material accommodating cylinder 130 is sleeved outside the furnace body 110 and attached to the outer wall of the furnace body 110. The heat insulation material inlet 102 is arranged at the upper part of the inner cavity of the cylinder body, and the inner cavity of the cylinder body is communicated with the heat insulation material conveying device 300 through the heat insulation material inlet 102. The thermal insulation material conveying device 300 conveys the thermal insulation material into the thermal insulation material accommodating cylinder 130 of the graphitization furnace 100 through the thermal insulation material inlet 102 to insulate the negative electrode material during the graphitization treatment of the negative electrode material.
In one embodiment of the present invention, as shown in fig. 2, the furnace body 110 may include, for example, a graphitization furnace heating body 112, and a first graphitization furnace transition section 111 and a second graphitization furnace transition section 113 respectively disposed at both ends of the graphitization furnace heating body 112. The materials of the graphitization furnace heating body 112, the first graphitization furnace transition section 111, and the second graphitization furnace transition section 113 are, for example, graphite/carbon. Wherein, a heating body inner cavity 1124 is arranged in the heating body 112 of the graphitization furnace. The transition section 111 of the first graphitization furnace is connected to the upper portion of the heating body 112 of the graphitization furnace through a first insulating member 114. The first graphitization furnace transition section 111 is provided with a first transition section inner cavity 1111, the anode material input section 120 is arranged at the upper part of the first graphitization furnace transition section 111, and the input section inner cavity 121 is communicated with the first transition section inner cavity 1111. The second graphitization furnace transition section 113 is connected to the lower portion of the graphitization furnace heating body 112 through a second insulating member 115. The transition section 113 of the second graphitization furnace is provided with a second transition section inner cavity 1131, and the second transition section inner cavity 1131, the first transition section inner cavity 1111 and the heating body inner cavity 1124 form the furnace body inner cavity. The anode material outlet 103 is disposed at a lower portion of the second transition section cavity 1131. Here, the first insulating member 114 and the second insulating member serve to block current. In addition, the furnace body 110 may further include a power supply 1123. The power supply 1123 is connected to two ends of the heating body 112 of the graphitization furnace, and is used for supplying power to the heating body 112 of the graphitization furnace so as to heat the negative electrode material in the heating body 112 of the graphitization furnace. Further, as shown in fig. 2, the diameter of heater cavity 1124 gradually increases from the end of graphitization furnace heater 112 adjacent to first insulation 114 to the end of graphitization furnace heater 112 adjacent to second insulation 115. That is, the diameter D1 of heater cavity 1124 from a section of graphitization furnace heater 112 adjacent to first insulation 114 is smaller than the diameter D2 of heater cavity 1124 from a section of graphitization furnace heater 112 adjacent to second insulation 115. This ensures that the material in the heating body 112 of the graphitization furnace flows smoothly from top to bottom.
Preferably, the resistance of the graphitization furnace heater 112 gradually increases outward in the radial direction of the graphitization furnace heater 112, and preferably, the outermost layer resistance is 5 times or more the innermost layer resistance. That is, in the radial direction, the resistance at the outer side wall position of the graphitizing furnace heating body 112 with the larger radius dimension is greater than the resistance at the inner side wall position with the smaller radius dimension, and the graphitizing furnace heating body 112 has a resistance gradient from inside to outside, and is low inside and high outside, so that the current can mainly pass through the inner side of the graphitizing furnace heating body 112, and the graphitization effect of the negative electrode material is improved. More preferably, the graphitization furnace heating body 112 may further include, for example, a first heating body 1121 and a second heating body 1122. The first heating body 1121 and the second heating body 1122 are both cylindrical tubular parts. The second heating member 1122 is disposed outside the first heating member 1121 and attached to the outer wall of the first heating member 1121. The first heating member 1121 is made of graphite having a high degree of graphite, and the first heating member 1121 is made of a porous non-graphitizable amorphous material. The resistance of the first heating body 1121 is smaller than that of the second heating body 1122. Thus, the graphitization effect of the negative electrode material can be further improved.
Further, as shown in fig. 1 and 3, the cooling device 400 includes an air cooling module 410, for example. The air cooling assembly 410 is sleeved on the outer wall of the lower part of the furnace body 110 and attached to the furnace body 110. The air cooling module 410 includes, for example: a cooling gas receiving cylinder 411, a cooling gas introduction pipe 412, and a cooling gas delivery pipe 413. Wherein, the cooling gas holds a section of thick bamboo 411 cover and establishes just attached on the outer wall of second graphitization furnace changeover portion 113 for cool off the cathode material through second graphitization changeover portion 113's second changeover portion inner chamber 1131, also can reduce the scaling loss of graphitization furnace 10 simultaneously. The cooling gas receiving cylinder 411 has a cooling gas receiving chamber 4111. A cooling gas introduction pipe 412 provided at a lower portion of an outer wall of the cooling gas storage cylinder 411 and communicating with the cooling gas storage cylinder 411; a cooling gas outlet pipe 413 is disposed on an upper portion of an outer wall of the cooling gas receiving cylinder 411 and communicates with the cooling gas receiving cylinder 411. In this way, the cooling gas housing cylinder 411, the cooling gas introduction pipe 412, and the cooling gas delivery pipe 413 form one gas cooling cycle, and the cooling gas enters from the cooling gas introduction pipe 412, passes through the gas housing cylinder 411, and is discharged from the cooling gas delivery pipe 413. It should be noted that the gas introduced into the gas cooling module 410 may be, for example, nitrogen, argon or other inert gases.
In addition, as shown in fig. 3, the cooling device 400 may further include a first water cooling assembly 420. The upper part of the first water cooling assembly 420 is connected to the lower part of the furnace body 110 and is communicated with the anode material outlet for cooling the material discharged from the anode material outlet. The first water cooling module 420 includes, for example: a first coolant storage cylinder 421, a first coolant introduction pipe 422, and a first coolant discharge pipe 423. Specifically, the upper portion of the first cooling liquid containing cylinder 421 communicates with the anode material outlet 103 of the graphitization furnace 100, and the first cooling liquid containing cylinder 421 has a first cooling liquid containing cavity 4211. The first cooling liquid introduction pipe 422 is disposed at a lower portion of an outer wall of the first cooling liquid accommodation cylinder 421 and communicates with the first cooling liquid accommodation chamber 4211. The first coolant outlet pipe 423 is disposed on an upper portion of an outer wall of the first coolant storage cylinder 421 and communicates with the first coolant storage chamber 4211. In this way, the first cooling liquid containing cylinder 421, the first cooling liquid inlet pipe 422, and the first cooling liquid outlet pipe 423 form a liquid cooling cycle, and the cooling liquid enters from the first cooling liquid inlet pipe 422, passes through the first cooling liquid containing cylinder 421, and is discharged from the first cooling liquid outlet pipe 423. It should be noted that the liquid introduced into the first water cooling module 420 may be, for example, water or other cooling liquid, which is not limited herein. Further, a first guide vane 4212 is further disposed on an inner wall of the first coolant accommodating cavity 4211, wherein the first guide vane 4212 is, for example, a spiral guide vane. The first guide vane 4212 guides the coolant introduced from the first coolant introduction pipe 422 to the first coolant discharge pipe 423. Thus, the cooling effect is improved.
As shown in fig. 1, 2 and 3, the discharging device 500 may include: a discharge barrel 510 and a material discharge assembly 520. The material discharge assembly 520 is disposed within the discharge barrel 510. Specifically, the discharging cylinder 510 is, for example, a long cylindrical component, and one end of the discharging cylinder 510 is communicated with the lower portion of the first cooling liquid containing cylinder 421 and is communicated with the anode material outlet 103 of the graphitization furnace 100 through the first cooling liquid containing cylinder 421, so as to receive the material discharged from the anode material outlet 103, that is, the cooled anode material. A material discharge assembly 520 is disposed within the discharge cylinder 510 to discharge the graphitized negative electrode material through the other end of the discharge cylinder 510. The material discharging component 520 can be, for example, a spiral discharging device, but can also be other discharging devices, and the invention is not limited thereto. Typically, the helical discharge device may, for example, comprise a rotating shaft, helical blades arranged on the rotating shaft, and a power transmission assembly connected to the rotating shaft.
Further, as shown in fig. 1 and fig. 3, the cooling device 400 may further include a second water cooling assembly 430 to further reduce the temperature of the graphitized negative electrode material, so as to improve the cooling effect. The second water cooling module 430 includes, for example: a second coolant storage cylinder 431, a second coolant introduction pipe 432, and a second coolant discharge pipe 433. The second cooling liquid containing cylinder 431 is sleeved outside the discharging cylinder 510 and attached to the outer wall of the discharging cylinder 510; the second cooling liquid containing cylinder 431 has a second cooling liquid containing chamber 4311. The second cooling liquid delivery pipe 433 is disposed on the upper portion of the outer wall of the second cooling liquid containing cylinder 431 and is communicated with the second cooling liquid containing cavity 4311. The second cooling liquid introduction pipe 432 is disposed at a lower portion of an outer wall of the second cooling liquid receiving cylinder 431 and communicates with the second cooling liquid receiving chamber 4311. It should be noted that the liquid introduced into the second water cooling module 430 may be, for example, water or other cooling liquid, which is not limited in the present invention. Further, a second guide vane 4312 is disposed in the second cooling liquid receiving cavity 4311, wherein the second guide vane 4312 is a spiral guide vane. The second guide vane 4312 is configured to guide the coolant introduced from the second coolant introduction pipe 432 to the second coolant discharge pipe 433, so as to further reduce the temperature of the material.
In one embodiment of the present invention, as shown in fig. 1 and 3, the continuous graphitization system 10 may further include an exhaust gas outlet means 800. Specifically, the exhaust gas discharge device 800 includes, for example: an exhaust gas collection canister 810 and a plurality of exhaust gas conduit assemblies 820. A plurality of exhaust manifold assemblies 820 communicate with the exhaust manifold 810. Specifically, the exhaust gas collecting cylinder 810 is, for example, a cylindrical component with a hollow interior, which is sleeved outside the graphitization furnace 100. An exhaust gas accommodating cavity 811 is arranged in the exhaust gas collecting cylinder 810. The plurality of exhaust gas duct assemblies 820 penetrate the side wall of the graphitization furnace 100, respectively, to guide the exhaust gas generated during graphitization treatment in the graphitization furnace 100 to the exhaust gas accommodating chamber 811 in the exhaust gas collecting cylinder 810. Further, as shown in fig. 3, each waste pipe assembly 820 includes, for example, a bent pipe 821 and a straight pipe 822. The elbow pipe 821 penetrates, for example, a side wall of the furnace body 110 of the graphitization furnace 100, that is, the elbow pipe 821 passes through the graphitization furnace heating body 112 of the furnace body 110 from the heating body inner cavity 1124 and extends into the cylinder inner cavity 131 of the heat insulating material accommodating cylinder 130 to introduce the exhaust gas in the furnace body 110 into the cylinder inner cavity 131. The straight guide pipe 822 penetrates the heat insulating material accommodating cylinder 130 and the exhaust gas accommodating chamber 811, that is, the straight guide pipe 822 extends from the cylinder inner chamber 131 of the heat insulating material accommodating cylinder 130 to the exhaust gas accommodating chamber 811 of the exhaust gas collecting cylinder 810 to guide the exhaust gas in the cylinder inner chamber 131 into the exhaust gas accommodating chamber 811. Further, the openings at both ends of the elbow 821 are disposed downward (refer to fig. 3), so that the possibility of the negative electrode material entering the elbow 821 can be reduced, and the obstruction of the elbow 821 can be avoided. Still further, the insulating material may, for example, include small particle size excipients and large particle size excipients. The particle size of the large-particle auxiliary material is larger than that of the small-particle auxiliary material. When carrying insulation material, can adopt the mode that little granule auxiliary material and large granule auxiliary material carried in turn for insulation material holds and fills with the position that exhaust duct subassembly 820 corresponds in the barrel inner chamber 131 of barrel 130 has the large granule auxiliary material, so, can promote the air permeability between curved pipe 821 and the straight pipe 822, is favorable to the discharge of waste gas. Of course, in other embodiments of the present invention, the curved conduit 821 and the straight conduit 822 may be directly connected to directly introduce the exhaust gas in the furnace body 110 into the exhaust gas receiving chamber 811.
Further, as shown in fig. 2 and 3, the graphitization furnace 100 is also provided with a first exhaust gas discharge port 104. Specifically, the first off-gas discharge port 104 is provided at an upper portion of the anode material input section 120, adjacent to the anode material inlet 101, for discharging off-gas from an upper portion of the graphitization furnace 100. The upper portion of the exhaust gas collecting cylinder 810 is provided with a second exhaust gas outlet 812 for discharging the exhaust gas in the exhaust gas accommodating chamber 811.
Further, as shown in fig. 1, fig. 3 and fig. 4, the continuous graphitization system 10 may further include an exhaust gas treatment device 600, and the exhaust gas treatment device 600 includes, for example: the incinerator 610, the desulfurizer 620, the fan 630 and the tail gas discharge pipe 640. Specifically, the incineration apparatus 610 is, for example, an incinerator. The incineration apparatus 610 communicates the first exhaust gas discharge port 104 and the second exhaust gas discharge port 812 for incinerating the discharged exhaust gas. The desulfurization device 620 is, for example, a desulfurization tower, which communicates with the incineration device 610, and is configured to perform desulfurization treatment on the incinerated exhaust gas discharged from the incineration device 610; the blower 630 is communicated between the desulfurization device 620 and the tail gas discharge pipe 640, and is used for discharging the desulfurized waste gas through the tail gas discharge pipe 740. Here, the exhaust gas treated and discharged by the exhaust gas treatment device 600 meets the emission standard. Consequently, carry out centralized processing to waste gas through setting up tail gas processing apparatus 600, reduced the destruction of harmful waste gas to the environment, reduced environmental pollution, be favorable to living environment's protection.
Preferably, as shown in fig. 3 and 4, the cooling gas outlet pipe 413 communicates with the exhaust gas accommodating chamber 811 of the exhaust gas collecting cylinder 810 to introduce the gas in the gas cooling device 410 into the exhaust gas accommodating chamber 811. At this time, nitrogen or inert gas is introduced into the air cooling device 410, and therefore, the nitrogen or inert gas is mixed with the waste gas in the waste gas accommodating cavity 811, so that safety accidents caused by burning of the waste gas in the waste gas accommodating cavity 811 due to high temperature can be avoided, and the safety of the whole system is improved.
As shown in fig. 1 and 4, the graphitization furnace 100 is further provided with a heat insulating material outlet 104. Specifically, the insulating material outlet 104 is provided at a lower portion of the insulating material accommodating cylinder 130. The continuous graphitization system 10 may also include an insulation reclamation apparatus 700. The heat insulating material recycling device 700 is communicated with the graphitization furnace 100, the cathode material conveying device 200 and the heat insulating material conveying device 300. The thermal insulation material recycling apparatus 700 includes, for example: a screening device 710, a first feedback device 720 and a second feedback device 730. Specifically, the screening device 710 is provided with a screening inlet 711, a first screening outlet 712 and a second screening outlet 713, and the screening inlet 711 communicates with the insulation outlet 104 of the graphitization furnace 100 for receiving the insulation discharged from the graphitization furnace 100. The first feedback device 720 is connected between the first screening outlet 712 and the insulation material delivery apparatus 300. The second feeding back device 730 is communicated between the second screening outlet 713 and the anode material conveying device 200. The first material returning device 720 and the second material returning device 730 are material conveying devices, respectively. Typically, the first material returning device 720 includes, for example, a roots blower, a dust remover, a buffer storage bin, etc. connected in sequence, which will not be described in detail herein. The first material returning device 720 is used for conveying large-particle auxiliary materials in the heat insulating materials to the heat insulating material conveying device 300, and the second material returning device 730 is used for conveying small-particle auxiliary materials in the heat insulating materials to the negative electrode material conveying device 200, so that the small-particle auxiliary materials are conveyed into the graphitization furnace 100 through the negative electrode material conveying device 200, and graphitization treatment is performed on the small-particle auxiliary materials. It is worth mentioning that the small particle auxiliary material is the same material as the negative electrode material. In this way, the preheating of the small-particle auxiliary materials in the heat-insulating material accommodating cylinder 130 is equivalent to the primary pre-graphitization of the small-particle auxiliary materials, and the small-particle auxiliary materials are conveyed into the graphitization furnace 100 by the heat-insulating material recycling device 700 for further graphitization treatment. That is, the heat insulating material accommodating cylinder 130 is sleeved outside the furnace body 110 of the graphitization furnace 100, energy emitted in the graphitization treatment process is well utilized to pre-graphitize the negative electrode material, and compared with the graphitization furnace in the prior art, energy is greatly saved, so that the graphitization effect of the negative electrode material can be improved, the energy utilization rate can be greatly improved, the energy consumption can be reduced, and the national energy is contributed.
Of course, in other embodiments of the present invention, the second material returning device 730 may also be communicated between the second screening outlet 713 and the heat insulating material conveying device 300, so as to convey the small particle auxiliary materials in the heat insulating material to the heat insulating material conveying device 300 for reuse as the heat insulating material, which may also improve the utilization rate of energy and reduce energy consumption. Even in other embodiments of the present invention, the small particle auxiliary materials and the large particle auxiliary materials may be fed into the graphitization furnace 100 manually or the like without providing the first material returning device 720 and the second material returning device 730.
In other embodiments of the present invention, as shown in fig. 4, the anode material conveying device 200 includes, for example, an anode material bin (also referred to as a main bin) 210 and a calcining apparatus 220. The anode material storage bin 210 is configured to receive an anode precursor (anode material before graphitization). Calcining apparatus 220, such as a calciner, communicates between anode material bin 210 and anode material inlet 101. The calcining equipment 220 is used for calcining the anode material before graphitization at the temperature of 600-1350 ℃ to remove volatile matters in the material, improve the quality of the material and reduce the generation of gas in the graphitization process. Further, a second material returning device 730 may be connected to the negative electrode material bin 210, and is configured to send the preheated small particle auxiliary material into the graphitization furnace 100 through the negative electrode material conveying device 200 for graphitization treatment.
In other embodiments of the present invention, as shown in FIG. 4, the insulation material delivery device 300 includes, for example, a small particle excipient delivery device 310 and a large particle excipient delivery device 320. The small-particle auxiliary material conveying device 310 includes, for example, a small-particle auxiliary material bunker 311, a calcining device 312, and a feeding machine 313. A small particle size additive bin 311 is provided for receiving small particle size additive. The small-particle auxiliary material is, for example, a negative electrode material to be graphitized or a material the same as the negative electrode material, and the particle size range of the small-particle auxiliary material is 0-3 mm. The calcining device 312, which is, for example, a calciner, communicates between the negative electrode material bin 210 and the feeding machine 313. The calcining equipment 312 is used for calcining the small-particle auxiliary materials at the temperature of 600-1350 ℃ so as to remove volatile matters in the materials, improve the quality of the materials and reduce the generation of gas in the graphitization process. A feeder 313 is connected between the calcining device 312 and the insulating material inlet 102 for conveying the calcined small particle auxiliary materials into the insulating material inlet 102. The large granule auxiliary material conveying device 320 includes, for example, a large granule auxiliary material bin 321 and a feeder 322. The large particle excipient silo 321 is configured to receive large particle excipients. The large-particle auxiliary material is, for example, calcined coke and/or graphite, the shape of the large-particle auxiliary material is preferably spherical, the spherical preparation is preferably subjected to isostatic pressing, and the particle size range of the large-particle auxiliary material is, for example, 5-30 mm. The feeder 322 is connected between the large-particle auxiliary material bin 321 and the insulation material inlet 102, and is used for conveying the received large-particle auxiliary material to the insulation material inlet 102. In addition, the aforementioned first material returning device 720 is connected to the large particle auxiliary material bin 321 to recycle the large particle auxiliary material. The number of the insulating material inlets 102 may be one, or may be plural, and the invention is not limited thereto.
It should be mentioned here that the small-particle auxiliary material conveying device 310 and the large-particle auxiliary material conveying device 320 are separately provided to control the alternating feeding and feeding ratio of the large-particle auxiliary material and the small-particle auxiliary material. Of course, in other embodiments of the present invention, the heat insulating material is the auxiliary material with the same particle size, and only one auxiliary material conveying device needs to be provided.
In summary, the continuous graphitization system provided by the embodiment of the present invention has the following characteristics and advantages:
1) continuous discharging and high productivity;
2) all materials pass through the same temperature field, and the processed materials have good consistency;
3) the crucible and the resistance material are not used, and the cost is low;
4) the graphitization furnace is not cooled after being heated for one time, a crucible and a resistance material are not required to be heated, electric energy is mainly used for graphitization, and the unit energy consumption of a product is greatly reduced;
5) inert gas and circulating water are sequentially adopted to accelerate cooling, so that the cooling time is greatly shortened, and meanwhile, the oxidation burning loss of the graphitization furnace can be effectively reduced;
6) the high-temperature inert gas is introduced into the smoke tube, so that on one hand, the tail gas of the waste gas is prevented from being ignited and combusted outside the graphitizing furnace, and on the other hand, heavy components such as tar and the like generated at high temperature are kept in the gaseous water inlet tail gas treatment device.
7) The method comprises the following steps of (1) pre-graphitizing a negative electrode material (a negative electrode material precursor) serving as a heat insulation material, mixing the discharged negative electrode material with other negative electrode material raw materials, then feeding the mixture into a calcining furnace, and then feeding the mixture into a graphitizing furnace for graphitization treatment, so that the realization of high graphitization degree is ensured, and the power consumption is fully utilized;
8) the automation degree of the whole process is high;
9) the whole process is in a closed environment, tail gas is treated in a centralized manner, the environment is controlled simply, and the atmospheric environment is protected.
Furthermore, the production process of the continuous graphitization system provided by the embodiment of the present invention includes, for example:
1) preparing materials, namely preparing a negative electrode precursor (small particle auxiliary material) to be graphitized, a high-temperature calcined negative electrode precursor (negative electrode material) and a coarse particle material (large particle auxiliary material), wherein the preparation amount of the high-temperature calcined negative electrode precursor at least meets the amount of filling a whole furnace, and the coarse particle material is calcined coke and/or graphite with the particle size of 5-30 mm. To increase the number of uses, it is preferred to isostatically press the spherical particles of calcined coke and/or graphite composite.
2) First filling: the high-temperature calcined cathode precursor is continuously filled into the cathode powder graphitization region from the storage bin 210 through the calcining equipment 220 until more than three-fourths of the whole furnace is filled; filling a negative electrode precursor to be graphitized into a heat-insulating material zone from a bin 311 through a calcining device 312, filling coarse particles into the heat-insulating material zone from a bin 321 and a screw feeder 322, and filling the coarse particles by 10-20 cm after filling the negative electrode precursor to be graphitized by 30-100 cm until the coarse particles are filled to more than three quarters of the whole furnace;
3) the calcining equipment and the graphitizing furnace are powered on, and a tail gas treatment device is started;
4) continuously filling;
5) starting a discharging device, and discharging in a variable frequency manner;
6) starting the liquid cooling assembly and the air cooling assembly;
7) packaging, namely, materials in the first furnace need to be re-burnt because the temperature does not reach the graphitization temperature;
8) the heat-insulating material accommodating cylinder body discharges materials, and a negative electrode precursor (small particle auxiliary materials) and a coarse particle material (large particle auxiliary materials) are separated through screening; and the negative electrode precursor material subjected to high-temperature treatment by the heat-insulating material containing barrel enters a graphitization furnace from a negative electrode material inlet for graphitization, and the coarse particle material is packaged and then reused or directly conveyed to a large-particle auxiliary material conveying device for use.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A continuous graphitization system comprising:
the graphitization furnace is provided with a negative electrode material inlet, a negative electrode material outlet and a heat insulation material inlet;
the heat insulation material conveying device is communicated with the heat insulation material inlet of the graphitization furnace;
the negative electrode material conveying device is communicated with the negative electrode material inlet of the graphitization furnace;
a cooling device arranged at the cathode material outlet of the graphitization furnace; and
the discharging device is communicated with the cooling device;
the negative electrode material conveying device is used for continuously conveying a negative electrode material to be graphitized into the graphitizing furnace through the negative electrode material inlet; the graphitization furnace is used for continuously carrying out graphitization treatment on the negative electrode material to obtain a graphitized negative electrode material; the heat insulation material conveying device is used for conveying a heat insulation material to the graphitization furnace through the heat insulation material inlet so as to insulate the negative electrode material; the cooling device is used for continuously cooling the graphitized negative electrode material to obtain a cooled negative electrode material; and the discharging device is used for discharging the cooled cathode material.
2. The continuous graphitization system of claim 1 wherein the graphitization furnace includes:
the furnace body is provided with a furnace body inner cavity, the cathode material outlet is arranged at the lower part of the furnace body inner cavity, and the cooling device is arranged at the lower part of the furnace body;
the anode material input section is arranged at the upper part of the furnace body and provided with an input section inner cavity, the input section inner cavity is communicated with the furnace body inner cavity, the anode material inlet is arranged at the upper part of the anode material input section and is communicated with the input section inner cavity, and the input section inner cavity is communicated with the anode material conveying device through the anode material inlet; and
the heat insulation material containing barrel is sleeved outside the furnace body and attached to the outer wall of the furnace body, the heat insulation material containing barrel is provided with a barrel inner cavity, a heat insulation material inlet is formed in the upper portion of the barrel inner cavity, and the barrel inner cavity is communicated with the heat insulation material conveying device through the heat insulation material inlet.
3. The continuous graphitization system of claim 2 wherein the furnace body includes:
the graphitizing furnace heating body is provided with a heating body inner cavity;
the first graphitization furnace transition section is connected to the upper part of a heating body of the graphitization furnace through a first insulating piece, the first graphitization furnace transition section is provided with a first transition section inner cavity, the negative electrode material input section is arranged at the upper part of the first graphitization furnace transition section, and the input section inner cavity is communicated with the first transition section inner cavity;
the second graphitization furnace transition section is connected to the lower part of a heating body of the graphitization furnace through a second insulating piece, the second graphitization furnace transition section is provided with a second transition section inner cavity, the first transition section inner cavity and the heating body inner cavity form the furnace body inner cavity, and the negative electrode material outlet is arranged at the lower part of the second transition section inner cavity;
the resistance of the heating body of the graphitization furnace is gradually increased outwards along the radial direction of the heating body of the graphitization furnace.
4. The continuous graphitization system of claim 3 wherein the cooling apparatus includes an air cooling assembly comprising:
the cooling gas containing cylinder is sleeved on the outer wall of the transition section of the second graphitization furnace and attached to the transition section of the second graphitization furnace, and is provided with a cooling gas containing cavity;
a cooling gas introduction pipe provided at a lower portion of an outer wall of the cooling gas accommodating cylinder and communicating with the cooling gas accommodating cylinder; and
and the cooling gas delivery pipe is arranged on the upper part of the outer wall of the cooling gas containing barrel and communicated with the cooling gas containing barrel.
5. The continuous graphitization system of claim 1 wherein the cooling means includes a first water cooling assembly comprising:
the upper part of the first cooling liquid accommodating cylinder is communicated with the cathode material outlet of the graphitization furnace, and the first cooling liquid accommodating cylinder is provided with a first cooling liquid accommodating cavity;
the first cooling liquid leading-in pipe is arranged at the lower part of the outer wall of the first cooling liquid accommodating cylinder and communicated with the first cooling liquid accommodating cavity; and
and the first cooling liquid delivery pipe is arranged on the upper part of the outer wall of the first cooling liquid accommodating barrel and communicated with the first cooling liquid accommodating cavity.
6. The continuous graphitization system according to claim 5, wherein a first guide vane for guiding the coolant introduced from the first coolant introduction pipe to the first coolant discharge pipe is provided in the first coolant accommodating chamber; the first guide vane is a spiral guide vane.
7. The continuous graphitization system of claim 5 wherein,
the discharging device comprises:
a discharge barrel, one end of which is communicated with the lower part of the first cooling liquid containing barrel and is communicated with the anode material outlet of the graphitization furnace through the first cooling liquid containing barrel; and
the material discharging assembly is arranged in the discharging barrel and is used for discharging the graphitized negative electrode material through the other end of the discharging barrel;
wherein, cooling device includes the second water cooling module, the second water cooling module includes:
the second cooling liquid containing cylinder is sleeved outside the discharging cylinder and attached to the outer wall of the discharging cylinder, and is provided with a second cooling liquid containing cavity;
the plurality of second cooling liquid leading-out pipes are arranged at the upper part of the outer wall of the second cooling liquid containing cylinder at intervals and communicated with the second cooling liquid containing cavity; and
the plurality of second cooling liquid leading-in pipes are arranged at the lower part of the outer wall of the second cooling liquid accommodating cylinder and are communicated with the second cooling liquid accommodating cavity;
a second guide vane is arranged in the second cooling liquid accommodating cavity and used for guiding the cooling liquid led in from the second cooling liquid lead-in pipe to the second cooling liquid lead-out pipe; and the two guide vanes are spiral guide vanes.
8. The continuous graphitization system of claim 1 further comprising an exhaust gas removal means comprising:
the waste gas gathering cylinder is sleeved outside the graphitization furnace;
and the waste gas guide pipe assemblies respectively penetrate through the side wall of the graphitization furnace so as to guide the waste gas in the graphitization furnace into the waste gas gathering cylinder.
9. The continuous graphitization system of claim 8 wherein the graphitization furnace is further provided with a first exhaust gas discharge port; the waste gas gathering cylinder is provided with a second waste gas outlet; the continuous graphitization system further includes a tail gas treatment device including:
the incineration equipment is communicated with the first waste gas outlet and the second waste gas outlet;
the desulfurization equipment is communicated with the incineration equipment;
the fan is communicated with the desulfurization equipment; and
and the tail gas discharge pipe is communicated with the fan.
10. The continuous graphitization system of claim 1 wherein the graphitization furnace is further provided with an insulation outlet; the continuous graphitization system further comprises a heat preservation material recycling device, and the heat preservation material recycling device comprises:
the screening equipment is provided with a screening inlet, a first screening outlet and a second screening outlet, and the screening inlet is communicated with the heat-insulating material outlet;
the first material returning device is communicated between the first screening outlet and the heat-insulating material conveying device; and
and the second material returning device is communicated between the second screening outlet and the negative electrode material conveying device.
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| CN201882914U (en) * | 2010-12-03 | 2011-06-29 | 长沙海容新材料有限公司 | High-temperature graphitizing carbon tube furnace used for lithium ion battery and made of graphite cathode material |
| CN106458596A (en) * | 2014-05-12 | 2017-02-22 | 株式会社Ihi | Graphitization furnace |
| CN104477885A (en) * | 2014-11-20 | 2015-04-01 | 中国电子科技集团公司第四十八研究所 | Vertical continuous induction type high-temperature graphitization furnace |
| CN108050848A (en) * | 2017-11-17 | 2018-05-18 | 唐红艳 | A kind of continuous electric forge furnace of high temperature |
| CN212151630U (en) * | 2020-03-05 | 2020-12-15 | 河南雅利安新材料有限公司 | Reaction furnace for graphite production |
| CN111457732A (en) * | 2020-05-07 | 2020-07-28 | 辽宁金田储能科技有限公司 | High-purity graphite continuous production system |
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| CN114608308A (en) | 2022-06-10 |
| CN114608308B (en) | 2023-05-02 |
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