CN216630865U

CN216630865U - Graphite class positive/negative pole material continuous reaction treatment facility

Info

Publication number: CN216630865U
Application number: CN202120841291.2U
Authority: CN
Inventors: 侯拥和; 龚俊; 廖文革; 刘诗华; 王佳宾; 黄少波
Original assignee: Hunan Asmi Technology Co ltd
Current assignee: Hunan Asmi Technology Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-05-31
Anticipated expiration: 2031-04-22

Abstract

The utility model relates to graphite anode/cathode material continuous reaction treatment equipment which comprises a feeding mechanism, a rotary reactor and a discharging mechanism, wherein the feeding mechanism and the discharging mechanism are connected with a corresponding feeding end and a corresponding discharging end of the rotary reactor in an abutting mode, the rotary reactor comprises a coating/pre-sintering section connected with the feeding end and a graphite anode carbonization section/anode material sintering section connected with the coating/pre-sintering section so as to achieve sequential continuous conveying of reaction materials from the feeding end, the coating/pre-sintering section and the carbonization/sintering section to the discharging end, a first heating furnace for coating/pre-sintering the reaction materials through heating is arranged outside the coating/pre-sintering section of the rotary reactor, and a second heating furnace for carbonizing/sintering the reaction materials through heating is arranged outside the carbonization/sintering section of the rotary reactor. The method has the advantages of reducing cost, saving energy, protecting environment, simplifying process flow and improving product quality.

Description

Graphite class positive/negative pole material continuous reaction treatment facility

Technical Field

The utility model mainly relates to the field of preparation of graphite cathode materials of lithium ion batteries, in particular to continuous reaction treatment equipment for graphite cathode/anode materials.

Background

The preparation process of the graphite cathode material of the lithium ion battery at present adopts the following process in the coating carbonization section: firstly, respectively crushing needle coke and asphalt to below-20 microns by a crushing device; mixing the two materials according to a certain proportion, then feeding the mixture into a coating reaction kettle, installing a resistance wire outside the reaction kettle, transferring heat to the materials in the reaction kettle through the wall of the reaction kettle, controlling the temperature of the materials according to a certain temperature control curve, and completing the softening and melting of the asphalt, and the coating and carbonization of the needle coke. The highest temperature of the materials is generally only 650 ℃ due to the limitation of heat transfer of equipment, partial aromatic hydrocarbon which can be decomposed only by high temperature higher than 650 ℃ in the asphalt can not be decomposed, the materials which are discharged from the coating reaction kettle need to be sprayed and cooled to be lower than 100 ℃ through another cooling kettle provided with a water-through indirect cooling device, then the materials are sent into a roller kiln or a pushed slab kiln to be heated to 1000 ℃ so that the aromatic hydrocarbon in the asphalt is further decomposed and carbonized, then the materials are sent to a graphitization furnace to complete graphitization at about 3000 ℃, and the products of the carbon-based lithium battery graphite cathode material are obtained after treatment after cooling. The material from the cooling kettle is directly sent into the graphitization furnace, and the graphitization furnace completes the task of further decomposing and carbonizing the aromatic hydrocarbon in the asphalt, but the graphitization furnace is mainly an Acheson furnace at present, and the Acheson furnace is not provided with a complete flue gas capturing and processing device, so that the environmental pollution is serious.

The process is similar to the coating carbonization process of the graphite cathode material of the lithium ion battery. At present, lithium iron phosphate, lithium nickel cobalt manganese oxide/lithium nickel cobalt aluminate (NCM/NCA) ternary lithium ion battery anode materials are also subjected to high-temperature static sintering in a pushed slab kiln or a roller kiln. The fully mixed raw materials are loaded into a corundum-mullite ceramic sagger and then enter a pushed slab kiln or a roller kiln for sintering, the temperature of a pre-sintering section is controlled below 600 ℃, and the drainage, coke removal and coating work of the materials is completed; the temperature of the high-temperature sintering section is controlled within the range of 600-1000 ℃, and the solid-phase sintering reaction of the precursor of the anode material and the lithium salt is completed. In the sintering process, a large amount of heat is absorbed by the ceramic sagger, and a large amount of heat loss is caused by the fact that the materials and the sagger need to be cooled at the discharge hole. In addition, because static sintering is adopted, heat transfer is limited, longer heat treatment residence time is needed compared with dynamic sintering, and the overall energy consumption is higher.

The existing lithium ion battery graphite negative electrode material coating carbonization process has the following problems: 1. the main thermal equipment, the reaction kettle and the water spray cooling kettle are all discontinuous operation equipment, and the single equipment has low processing capacity and high labor cost; 2. the single equipment has small processing capacity and low production efficiency due to heat transfer and limitation; 3. the thermal regulation is unreasonable, the materials are heated to 650 ℃ in the coating reaction kettle, the materials are cooled to normal temperature by an indirect water cooling method through a water spray cooling kettle during discharging, then the materials are sent into a roller kiln or a pushed slab kiln, the temperature is raised to about 1000 ℃ again, and the materials are cooled to normal temperature by water spray, so that the energy waste is serious.

The high-temperature sintering process of the prior lithium ion battery lithium iron phosphate, ternary anode materials and the like has the following problems: 1. high-temperature static sintering, wherein materials are contained in a ceramic sagger, the heat transfer of the materials is limited, the retention time is long, the processing capacity of single equipment is low, the energy consumption is high, and the manpower and equipment investment cost is high; 2. the sagger for containing materials absorbs a large amount of heat in the high-temperature sintering process, and the discharge port needs to be cooled in the lump, so that the energy consumption is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide the graphite type positive/negative electrode material continuous reaction treatment equipment which can reduce the cost, save energy, protect environment, simplify the process flow and improve the product quality.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a graphite class cathode material continuous reaction treatment facility, includes feed mechanism, rotary reactor and discharge mechanism, feed mechanism and discharge mechanism butt joint are at corresponding feed end and discharge end of rotary reactor, rotary reactor includes cladding/presintering section that meets with the feed end and graphite class cathode material carbomorphism section/cathode material sintering section that meets with the cladding section in order to realize that reaction material from feed end, cladding/presintering section, carbomorphism/sintering section to the continuous transport in proper order of discharge end, the cladding/presintering section of rotary reactor is arranged outward by the heating in order to realize the first heating furnace of reaction material cladding/presintering, the carbomorphism/sintering section of rotary reactor is arranged outward by the second heating furnace of heating in order to realize reaction material carbomorphism.

As a further improvement of the above technical solution:

still be provided with the cooling zone between rotary reactor's carbomorphism/sintering section and the discharge end in order to realize that reaction material from carbomorphism/sintering section, cooling zone to the continuous transport in proper order of discharge end, the cooling zone is adorned outward and is equipped with the cooling module that can cool off the outer wall of rotary reactor in order to do benefit to ejection of compact operation.

The cooling assembly comprises a water spray cooling water tank, a circulating water cooling tower, a hot water pump, a water inlet pipe, a water outlet pipe, a spray mechanism and a cold water pump, wherein the water spray cooling water tank is arranged on the lower part of the rotary reactor, the spray mechanism is arranged above the rotary reactor, the circulating water cooling tower is connected with the spray mechanism through the water inlet pipe, the water spray cooling water tank is connected with the circulating water cooling tower through the water outlet pipe, the hot water pump is arranged on the water outlet pipe, and the cold water pump is arranged on the water inlet pipe.

The first heating furnace, the second heating furnace and the cooling assembly are coaxially arranged with the rotary reactor; the first heating furnace, the second heating furnace and the cooling assembly are arranged at intervals along the rotary reactor; the supporting devices for supporting corresponding positions of the rotary reactor are arranged outside the rotary reactor at intervals; the rotary reactor comprises a reactor body and a rotary driving piece, the reactor body is arranged in the first heating furnace, the second heating furnace and the cooling assembly in a penetrating mode and is in butt joint with the feeding mechanism and the discharging mechanism, and the rotary driving piece is arranged outside the reactor body and drives the reactor body to rotate.

The first heating furnace comprises a first furnace body and a first heating element which is arranged on the first furnace body and extends into the first furnace body, and the first furnace body is arranged outside the rotary reactor; the second heating furnace comprises a second furnace body and a second heating element which is arranged on the second furnace body and extends into the second furnace body, and the second furnace body is arranged outside the rotary reactor.

A material raising scraper mechanism which can selectively realize synchronous rotation or asynchronous rotation with the rotary reactor is arranged in the reaction cavity of the rotary reactor; the material lifting scraper mechanism is configured to selectively rotate synchronously with the rotary reactor when lifting materials and to selectively rotate asynchronously with the rotary reactor when scraping materials.

The material raising scraper mechanism comprises a material raising scraper driving part, a transmission shaft and a material raising scraper plate part, the transmission shaft extends into the rotary reactor and is connected with the material raising scraper driving part, and the material raising scraper plate part is installed on the transmission shaft.

The material lifting scraper piece comprises a first material lifting scraper unit arranged at the feeding end and a second material lifting scraper unit arranged at the rear part, and the first material lifting scraper unit and the second material lifting scraper unit are arranged on the transmission shaft at intervals along the material conveying direction; the first material raising scraper blade unit and the second material raising scraper blade unit are both composed of cage-shaped support frames, and the cage-shaped support frames are installed on the transmission shaft.

A material guide barrel is arranged at the part, close to the feeding hole, of the first lifting scraper blade unit, a material guide spiral is arranged in an inner cavity of the material guide barrel, and material leaking holes are uniformly formed in the barrel wall of the material guide barrel; the cage-shaped support frame comprises support ring frames arranged at the front end and the rear end and a lifting scraper connected with the two support ring frames.

The transmission shaft is formed by connecting a plurality of short shafts through movable joint bearings, a first material lifting scraper unit is installed on one short shaft close to the feeding end, and a second material lifting scraper unit is installed on each subsequent short shaft.

The rotary reactor is obliquely arranged, the feeding end of the rotary reactor is at a high position, and the discharging end of the rotary reactor is at a low position; the included angle between the axis of the rotary reactor and the horizontal line is a, and a is more than 0 degree and less than or equal to 10 degrees.

The butt joint of the rotary reactor and the feeding mechanism and the discharging mechanism is provided with a sealing device, the sealing device comprises a first solid sealing group, a gas sealing group and a second solid sealing group which are arranged along the circumferential direction of the rotary reactor, and the first solid sealing group, the gas sealing group and the second solid sealing group are sequentially arranged along the axial direction and form axial sealing with each other; the first, gas, and second solid seal groups each form a radial seal against the rotary reactor.

The first solid sealing group comprises a first static ring, a first elastic sealing element and a first movable ring, the first elastic sealing element is pressed between the first static ring and the rotary reactor, the first movable ring is connected with the end part of the first static ring and axially compresses the first elastic sealing element, and the gas sealing group is connected with the first movable ring; the gas sealing group comprises a second static ring, an inflation cavity with the gas pressure larger than that in the rotary reactor is formed between the second static ring and the rotary reactor, an inflation pipe for inflating protective gas into the inflation cavity is arranged on the second static ring, and the second solid sealing group is connected with the second static ring; the second solid sealing group comprises a third static ring, a second elastic sealing element and a pushing element, the third static ring is connected with the gas sealing group, the second elastic sealing element is pressed between the third static ring and the rotary reactor, and the pushing element is arranged on the third static ring and applies radial pressure to the second elastic sealing element; the second solid sealing group further comprises a fourth static ring, a third elastic sealing element and a second movable ring, the fourth static ring is connected with the third static ring, the third elastic sealing element is arranged between the fourth static ring and the rotary reactor in a pressing mode, and the second movable ring is connected with the end portion of the fourth static ring and compresses the third elastic sealing element axially.

Compared with the prior art, the utility model has the advantages that:

when the continuous reaction treatment equipment for the graphite anode/cathode materials is operated, the rotary reactor is started firstly, so that the rotary reactor is operated and rotated; then starting the first heating furnace, the second heating furnace and the cooling assembly to enable the body of the corresponding section to reach a corresponding preset temperature zone; then starting the feeding mechanism to enable the needle coke and the asphalt mixed according to a certain proportion to enter the rotary reactor through the feeding mechanism; and finally, starting the discharging mechanism to output the material which is coated, carbonized and sintered from the discharging mechanism. Compared with the traditional structure, the equipment realizes the continuity of the processes of coating of graphite cathode materials/presintering of anode materials, carbonization of the cathode materials/sintering of the anode materials and cooling of the lithium ion battery through the integrated rotary reactor, ensures the consistency of products and obviously improves the quality of the products; the method has the advantages that the conventional equipment for coating the reaction kettle with the negative electrode material, coating the cooling kettle, cooling the cooling kettle, carbonizing the roller kiln or the pusher kiln and indirectly cooling water and the equipment for coating the box furnace with the positive electrode material, carbonizing the roller kiln or the pusher kiln and indirectly cooling water are replaced, so that the process flow and the labor intensity and the number of workers of the operators are greatly simplified, the energy consumption per ton of the product is greatly reduced, the equipment investment, the labor cost and the energy consumption cost are remarkably reduced, and the equipment can be enlarged; meanwhile, the computer automatic control is easy to realize, so that the production cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a continuous reaction processing apparatus for graphite-based positive/negative electrode materials according to the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic view of the structure of the cooling module of the present invention.

FIG. 4 is a schematic view of the internal structure of the rotary reactor of the present invention.

Fig. 5 is a schematic view of the structure of the sealing device of the present invention.

The reference numerals in the figures denote:

1. a feeding mechanism; 2. rotating the reactor; 21. a reactor body; 22. a rotary drive member; 221. driving the supporting seat; 222. a drive motor; 223. a speed reducer; 224. a drive wheel; 225. a driving wheel; 3. a discharging mechanism; 4. a first heating furnace; 41. a first furnace body; 42. a first heating member; 5. a second heating furnace; 51. a second furnace body; 52. a second heating member; 6. a cooling assembly; 61. a water spray cooling water tank; 62. circulating water cooling tower; 63. a hot water pump; 64. a water inlet pipe; 65. A water outlet pipe; 66. a spraying mechanism; 67. a cold water pump; 7. a support device; 71. a roller seat; 72. a support wheel; 8. a material lifting scraper mechanism; 81. a material raising scraper drive; 82. a drive shaft; 821. a minor axis; 822. a movable joint bearing; 83. a material lifting scraper plate; 831. a first material raising scraper unit; 832. a second material raising scraper unit; 8311. a material guide cylinder; 83111. a material leaking hole; 8312. the material guiding is spiral; 833. a cage-shaped support frame; 8331. a support ring frame; 8332. a material raising scraper plate; 9. a sealing device; 91. a first solid seal group; 911. a first stationary ring; 912. a first resilient seal member; 913. a first rotating ring; 92. a gas seal group; 921. a second stationary ring; 922. an inflation cavity; 923. an inflation tube; 93. a second solid seal group; 931. a third stationary ring; 932. a second resilient seal member; 933. a biasing member; 934. a fourth stationary ring; 935. a third resilient seal member; 936. a second rotating ring.

Detailed Description

The utility model will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1 to 5, an embodiment of the continuous reaction treatment equipment for graphite-based positive/negative electrode materials of the present invention is used for continuous coating carbonization of graphite-based negative electrode materials of lithium ion batteries. It includes feed mechanism 1, rotary reactor 2 and discharge mechanism 3, feed mechanism 1 and discharge mechanism 3 butt joint are at the corresponding feed end and the discharge end of rotary reactor 2, rotary reactor 2 includes the cladding section that meets with the feed end and the carbomorphism section that meets with the cladding section in order to realize that reaction material is from the feed end, the cladding section, the consecutive transport of carbomorphism section to the discharge end, rotary reactor 2's cladding section is outer to be arranged and to be passed through the heating in order to realize reaction material cladding first heating furnace 4, rotary reactor 2's carbomorphism section is outer to be arranged and to pass through the heating in order to realize the second heating furnace 5 of reaction material carbomorphism. When the coating carbonization equipment operates, the rotary reactor 2 is started first, so that the rotary reactor 2 operates and rotates; then starting the first heating furnace 4 and the second heating furnace 5 to enable the corresponding sections to reach the corresponding preset temperature areas; then starting the feeding mechanism 1 to enable the needle coke and the asphalt mixed according to a certain proportion to enter the rotary reactor 2 through the feeding mechanism 1; and finally, starting the discharging mechanism 3 to output the materials which are coated and carbonized from the discharging mechanism 3. Compared with the traditional structure, the equipment realizes the continuity of the coating, carbonization and cooling processes of the graphite cathode material of the lithium ion battery through the integrated rotary reactor 2, ensures the consistency of the product and obviously improves the product quality; the equipment has the advantages that the equipment for coating the reaction kettle, cooling the cooling kettle, carbonizing the roller kiln or the pushed slab kiln and indirectly cooling water at present is replaced, the process flow and the labor intensity and the number of workers of the operators are greatly simplified, the energy consumption per ton of products is greatly reduced, the equipment investment, the labor cost and the energy consumption cost are obviously reduced, and the large-scale equipment can be realized; meanwhile, the computer automatic control is easy to realize, so that the production cost is greatly reduced.

In this embodiment, still be provided with the cooling zone between the carbomorphism section of rotatory reactor 2 and the discharge end in order to realize that reaction material from carbomorphism section, cooling zone to the continuous conveyor in proper order of discharge end, the cooling zone is equipped with outward and can carries out cooling to the outer wall of rotatory reactor 2 in order to do benefit to the cooling module 6 of ejection of compact operation. This cooling module 6 continuously cools off the outer wall of rotatory reactor 2 and lowers the temperature, guarantees the material temperature of rotatory reactor 2 export.

In this embodiment, the cooling module 6 includes a water spray cooling water tank 61, a circulating water cooling tower 62, a hot water pump 63, a water inlet pipe 64, a water outlet pipe 65, a spraying mechanism 66 and a cold water pump 67, the water spray cooling water tank 61 is disposed at the lower part of the rotary reactor 2, the spraying mechanism 66 is disposed above the rotary reactor 2, the circulating water cooling tower 62 is connected with the spraying mechanism 66 through the water inlet pipe 64, the water spray cooling water tank 61 is connected with the circulating water cooling tower 62 through the water outlet pipe 65, the hot water pump 63 is mounted on the water outlet pipe 65, and the cold water pump 67 is mounted on the water inlet pipe 64. In the structure, cooling water in a circulating water cooling tower 62 enters a spraying mechanism 66 through a water inlet pipe 64 under the action of a cold water pump 67 to spray and cool a rotary reactor 2, and then the water after heat exchange flows back to the circulating water cooling tower 62 through a hot water pump 63 and a water outlet pipe 65, so that a circulating cooling system is integrally formed. The material temperature at the outlet of the rotary reactor 2 is ensured to be 0-200 ℃.

In this embodiment, the rotary reactor 2 is disposed in an inclined manner, the feeding end of the rotary reactor 2 is at a high position, and the discharging end of the rotary reactor 2 is at a low position. Set up like this for the material is in the rotatory effort of self gravity and rotatory reactor 2 and is lastingly carried to the discharge end, has improved efficiency.

In the embodiment, the included angle between the axis of the rotary reactor 2 and the horizontal line is a, and a is more than 0 degree and less than or equal to 10 degrees. The angle a is set to 7 ° in this embodiment. By the arrangement, the uniform coating, full carbonization and cooling effects of the materials can be guaranteed, and the discharging efficiency can be guaranteed.

In this embodiment, the first heating furnace 4, the second heating furnace 5 and the cooling module 6 are all arranged coaxially with the rotary reactor 2. By the arrangement, the distances among the first heating furnace 4, the second heating furnace 5 and the cooling assembly 6 and all positions of the rotary reactor 2 in the circumferential direction are consistent, namely, the hot and cold uniformity of corresponding temperature areas and corresponding cold areas of the rotary reactor 2 is ensured.

In this embodiment, the first heating furnace 4, the second heating furnace 5 and the cooling module 6 are arranged at intervals along the rotary reactor 2. The arrangement is convenient for temperature arrangement and regulation of each temperature area and each cold area, and mutual influence is reduced.

In this embodiment, the support devices 7 for supporting the respective corresponding positions of the rotary reactor 2 are installed outside the rotary reactor 2 at intervals. Because the rotary reactor 2 is a continuous integrated structure, the length of the rotary reactor is longer, and the supporting devices 7 are arranged at intervals, so that the rotary reactor 2 is conveniently supported, and the stability of the equipment is improved.

In this embodiment, the supporting device 7 includes a roller seat 71 and a supporting wheel 72, the supporting wheel 72 is fixed on the rotating reactor 2, the roller seat 71 is fixed on the ground and contacts with the supporting wheel 72, and the normal rotating function of the rotating reactor 2 can be ensured while the rotating reactor 2 is supported.

In this embodiment, the rotary reactor 2 includes a reactor body 21 and a rotary driving member 22, the reactor body 21 is inserted into the first heating furnace 4, the second heating furnace 5 and the cooling assembly 6 and is connected with the feeding mechanism 1 and the discharging mechanism 3, and the rotary driving member 22 is disposed outside the reactor body 21 and drives the reactor body 21 to rotate. In this structure, the reactor body 21 is driven to rotate by the rotary drive member 22, and the structure is simple and reliable.

In this embodiment, the rotary driving member 22 includes a driving support seat 221, a driving motor 222, a speed reducer 223, a driving wheel 224 and a driving wheel 225, the driving support seat 221 is fixed on the ground, the driving wheel 224 is installed on the driving support seat 221, the driving wheel 225 is fixed on the rotary reactor 2 and connected to the driving wheel 224, and the driving motor 222 drives the driving wheel 224 to rotate through the speed reducer 223, so as to drive the rotary reactor 2 to rotate through the driving wheel 225.

In the present embodiment, the first heating furnace 4 includes a first furnace body 41 and a first heating member 42 mounted on the first furnace body 41 and extending to the inside thereof, the first furnace body 41 being disposed outside the rotary reactor 2; the second heating furnace 5 includes a second furnace body 51 and a second heating member 52 installed on the second furnace body 51 and extending to the inside thereof, the second furnace body 51 being disposed outside the rotary reactor 2. In the structure, the first heating furnace 4 is designed to be at a temperature of 0-650 ℃, an electric heating element (a first heating element 42), combustion fuel oil, combustion producer gas and combustion natural gas can be used for heating, in order to ensure the uniformity of a temperature field, a burner for combusting the fuel can adopt a radiation type burner, and the task of the first section is mainly to complete the coating and partial carbonization of the carbon raw material by the asphalt; the second heating furnace 5 is designed to be at a temperature of 450-1100 ℃, and the heating mode can use an electric heating element (the second heating element 52), fuel oil combustion, producer gas combustion and natural gas combustion. In order to reduce energy consumption, a regenerative burner can be adopted as a burner for burning fuel. The second stage of the process mainly completes the carbonization of the coated asphalt.

In the embodiment, a material lifting scraper mechanism 8 which can selectively realize synchronous rotation or asynchronous rotation with the rotary reactor 2 is arranged in the reaction cavity of the rotary reactor 2; the lifter scraper mechanism 8 is configured to selectively rotate synchronously with the rotary reactor 2 when lifting and to selectively rotate asynchronously with the rotary reactor 2 when scraping. Compared with the traditional structure, the device is used for raising materials to ensure uniform coating when the device rotates synchronously with the rotary reactor 2 through the material raising scraper mechanism 8, can effectively turn the materials, and ensures the coating quality of the asphalt on the needle coke; when the material lifting scraper mechanism 8 and the rotary reactor 2 rotate asynchronously, the material lifting scraper mechanism is used for scraping materials to prevent the materials from sticking to the wall, the materials sticking to the rotary reactor 2 can be cleaned, the ring formation caused by the materials sticking to the wall in the rotary reactor 2 is effectively prevented, and the long-period operation of the process is ensured.

In this embodiment, the material raising scraper mechanism 8 comprises a material raising scraper driving member 81, a transmission shaft 82 and a material raising scraper plate member 83, the transmission shaft 82 extends into the rotary reactor 2 and is connected with the material raising scraper driving member 81, and the material raising scraper plate member 83 is installed on the transmission shaft 82. The material lifting scraper driving piece 81 drives the transmission shaft 82 to rotate, the transmission shaft 82 drives the material lifting scraper 83 to rotate, when the material lifting scraper 83 and the rotary reactor 2 rotate synchronously, the material can be effectively stirred, and the coating quality of the needle coke by the asphalt is ensured; when the lifting scraper plate 83 rotates the reactor 2 asynchronously, the material stuck on the rotating reactor 2 can be cleaned, the ring formation caused by the material sticking on the wall in the rotating reactor 2 is effectively prevented, and the long-period operation of the process is ensured.

In this embodiment, the lifting scraper plate 83 includes a first lifting scraper unit 831 and a second lifting scraper unit 832 at the rear of the first lifting scraper unit 831, which are disposed at the feeding end, and the first lifting scraper unit 831 and the second lifting scraper unit 832 are disposed on the transmission shaft 82 at intervals along the material conveying direction; the first winnowing scraper unit 831 and the second winnowing scraper unit 832 are both composed of cage-shaped support frames 833, and the cage-shaped support frames 833 are installed on the transmission shaft 82. In this structure, through the first material raising scraper blade unit 831 and the second material raising scraper blade unit 832 of interval arrangement, can realize that the effective material that turns over of each position falls the material that glues on rotary reactor 2 with the clearance, further guaranteed the cladding quality and effectively prevented in the rotary reactor 2 because of the material glues the knot circle that the wall arouses.

In this embodiment, a part of the first material lifting scraper unit 831, which is close to the feed inlet, is provided with a material guide cylinder 8311, an internal cavity of the material guide cylinder 8311 is provided with a material guide screw 8312, and a wall of the material guide cylinder 8311 is uniformly provided with material leaking holes 83111, in the structure, continuous material guide conveying is formed under the action of the material guide cylinder 8311 and the material guide screw 8312, and the material leaking holes 83111 are arranged, so that on one hand, materials can pass quickly, and a normal conveying function is ensured; on the other hand, the material from the material leakage hole 83111 temporarily supports the material guide cylinder 8311, which is equivalent to indirectly supporting the transmission shaft 82, thereby improving the stability; the cage-shaped supporting frame 833 comprises supporting ring frames 8331 arranged at the front end and the rear end and a material lifting scraper 8332 connected with the two supporting ring frames 8331. In the structure, the support ring frames 8331 rotate along with the transmission shaft 82, and when the material lifting scraper 8332 between the two support ring frames 8331 and the rotary reactor 2 synchronously rotate, the material can be effectively turned, so that the coating quality of the needle coke by the asphalt is ensured; when the material lifting scraper plate member 33 and the rotary reactor 2 rotate asynchronously, the material stuck on the rotary reactor 2 can be cleaned, so that the ring formation caused by the material sticking to the wall in the rotary reactor 2 is effectively prevented, and the long-period operation of the process is ensured.

In this embodiment, the transmission shaft 82 is formed by connecting a plurality of short shafts 821 through movable knuckle bearings 822, a first material raising scraper unit 831 is installed on one short shaft 821 near the feeding end, and a second material raising scraper unit 832 is installed on each subsequent short shaft 821. In the structure, the transmission shaft 82 is formed by connecting a plurality of short shafts 821 through movable knuckle bearings 822, so that the whole bending resistance of the transmission shaft 82 is enhanced; and a first material raising scraper blade unit 831 is installed on a section of short shaft 821 near the feeding end, and a second material raising scraper blade unit 832 is installed on each subsequent section of short shaft 821, so that the materials at the feeding end can be fully turned through the first material raising scraper blade unit 831, and the rapid material conveying is ensured through the second material raising scraper blade unit 832 subsequently.

In this embodiment, the joints of the rotary reactor 2 and the feeding mechanism 1 and the discharging mechanism 3 are provided with sealing devices 9, each sealing device comprises a first solid sealing group 91, a gas sealing group 92 and a second solid sealing group 93 which are circumferentially arranged along the rotary reactor 2, and the first solid sealing group 91, the gas sealing group 92 and the second solid sealing group 93 are sequentially arranged along the axial direction at the gas leakage point and form axial sealing with each other; the first solids seal pack 91, the gas seal pack 92 and the second solids seal pack 93 all form radial seals to the rotary reactor 2. In the structure, a rotating gap exists at the butt joint of the rotating reactor 2 and a fixing piece at the end part of the rotating reactor, and the rotating reactor 2 is sealed by the first solid sealing group 91 to prevent harmful gas from leaking; protective gas is further introduced through the gas seal group 92, so that on one hand, the gas pressure of the gas seal group 92 is greater than the gas pressure in the rotary reactor 2 to form further positive pressure seal, and on the other hand, if the protective gas enters the rotary reactor 2, the protective gas can be provided for the rotary reactor 2, and the reaction efficiency is further improved; and the second solids seal group 93 further forms a seal against the rotating reactor 2, equivalent to forming a third stage seal, further preventing leakage of protective nitrogen. The whole structure is simple and reliable, and the sealing performance is good. Through the axial and radial double sealing, the sealing performance is greatly improved.

In this embodiment, the first solids seal group 91 comprises a first stationary ring 911, a first elastic seal 912 and a first rotating ring 913, the first elastic seal 912 is press-fitted between the first stationary ring 911 and the rotary reactor 2, the first rotating ring 913 is connected with the end of the first stationary ring 911 and axially presses the first elastic seal 912, and the gas seal group 92 is connected with the first rotating ring 913; the gas sealing group 92 comprises a second stationary ring 921, a gas filling cavity 922 with the gas pressure larger than the gas pressure in the rotary reactor 2 is formed between the second stationary ring 921 and the rotary reactor 2, a gas filling pipe 923 used for filling protective gas into the gas filling cavity 922 is arranged on the second stationary ring 921, and a second solid sealing group 93 is connected with the second stationary ring 921; the second solid sealing group 93 comprises a third static ring 931, a second elastic sealing element 932 and a pushing member 933, the third static ring 931 is connected with the gas sealing group 92, the second elastic sealing element 932 is pressed between the third static ring 931 and the rotary reactor 2, and the pushing member 933 is arranged on the third static ring 931 and applies radial pressure to the second elastic sealing element 932; the second solid seal group 93 further comprises a fourth stationary ring 934, a third elastic seal 935 and a second moving ring 936, wherein the fourth stationary ring 934 is connected with the third stationary ring 931, the third elastic seal 935 is press-fitted between the fourth stationary ring 934 and the rotary reactor 2, and the second moving ring 936 is end-connected with the fourth stationary ring 934 and axially compresses the third elastic seal 935. In the structure, the first elastic sealing element 912 is formed by an asbestos packing to form a soft high-temperature-resistant sealing material, and the first movable ring 913 axially compresses the first elastic sealing element 912, so that the first elastic sealing element 912 radially expands, and the first elastic sealing element 912 radially seals the rotary reactor 2. Nitrogen is filled through the gas filling pipe 923 to make the gas pressure of the gas filling cavity 922 larger than the gas pressure in the rotary reactor 2, thereby forming further positive pressure sealing. The second elastic sealing member 932 is formed of an asbestos packing to form a soft high temperature resistant sealing material, and the biasing member 933 radially biases the second elastic sealing member 932 to radially seal the rotary reactor 2. The third elastic sealing member 935 is formed of an asbestos packing to form a soft high temperature resistant sealing material, and the second moving ring 936 axially compresses the third elastic sealing member 935 to cause radial expansion of the third elastic sealing member 935, thereby achieving radial sealing of the third elastic sealing member 935 against the rotary reactor 2.

In other embodiments, the device can also be used for continuous high-temperature sintering of lithium iron phosphate cathode materials of lithium ion batteries. The rotary reactor comprises a feeding mechanism 1, a rotary reactor 2 and a discharging mechanism 3, wherein the feeding mechanism 1 and the discharging mechanism 3 are butted at a corresponding feeding end and a corresponding discharging end of the rotary reactor 2, the rotary reactor 2 comprises a pre-sintering section connected with the feeding end and a sintering section connected with the pre-sintering section so as to realize sequential and continuous conveying of reaction materials from the feeding end, the pre-sintering section and the sintering section to the discharging end, a first heating furnace 4 for realizing pre-sintering of the reaction materials through heating is arranged outside the pre-sintering section of the rotary reactor 2, and a second heating furnace 5 for sintering the reaction materials at a high temperature through heating is arranged outside the sintering section of the rotary reactor 2. When the high-temperature sintering equipment runs, the rotary reactor 2 is started firstly, so that the rotary reactor 2 runs and rotates; then starting the first heating furnace 4 and the second heating furnace 5 to enable the corresponding sections to reach the corresponding preset temperature areas; starting the feeding mechanism 1 again to enable the precursor and the lithium salt mixed according to a certain proportion to enter the rotary reactor 2 through the feeding mechanism 1; and finally, starting the discharging mechanism 3 to output the material subjected to high-temperature sintering from the discharging mechanism 3. Compared with the traditional structure, the device realizes the continuity of the procedures of pre-sintering, high-temperature sintering and cooling of the lithium iron phosphate anode material of the lithium ion battery through the integrated rotary reactor 2, ensures the consistency of the product and obviously improves the product quality; the method has the advantages that the existing box-type furnace and roller kiln or pushed slab kiln sintering equipment is replaced, the process flow and the labor intensity and the number of workers for operating the workers are greatly simplified, the energy consumption per ton of products is greatly reduced, the equipment investment, the labor cost and the energy consumption cost are obviously reduced, and the large-scale equipment can be realized; meanwhile, the computer automatic control is easy to realize, so that the production cost is greatly reduced.

In other embodiments, the device can also be used for continuous high-temperature sintering of the nickel cobalt lithium manganate ternary positive electrode material of the lithium ion battery. Similarly, the device comprises a feeding mechanism 1, a rotary reactor 2 and a discharging mechanism 3, wherein the feeding mechanism 1 and the discharging mechanism 3 are butted at a feeding end and a discharging end corresponding to the rotary reactor 2, the rotary reactor 2 comprises a pre-sintering section connected with the feeding end and a sintering section connected with the pre-sintering section so as to realize sequential and continuous conveying of reaction materials from the feeding end, the pre-sintering section and the sintering section to the discharging end, a first heating furnace 4 for realizing pre-sintering of the reaction materials through heating is arranged outside a coating section of the rotary reactor 2, and a second heating furnace 5 for sintering at a high temperature through heating is arranged outside the sintering section of the rotary reactor 2. When the high-temperature sintering equipment runs, the rotary reactor 2 is started firstly, so that the rotary reactor 2 runs and rotates; then starting the first heating furnace 4 and the second heating furnace 5 to enable the corresponding sections to reach the corresponding preset temperature areas; starting the feeding mechanism 1 again to enable the ternary precursor and the lithium salt mixed according to a certain proportion to enter the rotary reactor 2 through the feeding mechanism 1; and finally, starting the discharging mechanism 3 to output the material subjected to high-temperature sintering from the discharging mechanism 3. Compared with the traditional structure, the device realizes the continuity of the processes of pre-sintering, high-temperature sintering and cooling of the lithium ion battery nickel cobalt lithium manganate anode material through the integrated rotary reactor 2, ensures the consistency of products and obviously improves the product quality; the sintering equipment of the prior roller kiln or pushed slab kiln is replaced, the process flow and the labor intensity and the number of workers for operating the workers are greatly simplified, the energy consumption per ton of products is also greatly reduced, the equipment investment, the labor cost and the energy consumption cost are obviously reduced, and the large-scale equipment can be realized; meanwhile, the computer automatic control is easy to realize, so that the production cost is greatly reduced.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the utility model, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A graphite class positive/negative pole material continuous reaction treatment facility which characterized in that: comprises a feeding mechanism (1), a rotary reactor (2) and a discharging mechanism (3), the feeding mechanism (1) and the discharging mechanism (3) are butted at the corresponding feeding end and the corresponding discharging end of the rotary reactor (2), the rotary reactor (2) comprises a coating/pre-sintering section connected with the feeding end and a carbonization/sintering section connected with the coating/pre-sintering section so as to realize the sequential and continuous conveying of reaction materials from the feeding end, the coating/pre-sintering section and the carbonization/sintering section to the discharging end, a first heating furnace (4) for realizing the coating/presintering of reaction materials by heating is arranged outside the coating/presintering section of the rotary reactor (2), and a second heating furnace (5) for heating to realize carbonization/sintering of the reaction materials is arranged outside the carbonization section of the rotary reactor (2).

2. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to claim 1, characterized in that: still be provided with the cooling zone between the carbomorphism/sintering section of rotatory reactor (2) and the discharge end in order to realize that reaction material from carbomorphism/sintering section, cooling zone to the continuous transport in proper order of discharge end, the cooling zone is adorned outward and is equipped with cooling assembly (6) that can cool off the outer wall of rotatory reactor (2) in order to do benefit to ejection of compact operation.

3. The continuous reaction treatment apparatus for graphite-based positive/negative electrode materials according to claim 2, characterized in that: cooling module (6) are including water spray cooling trough (61), circulating water cooling tower (62), hot water pump (63), inlet tube (64), outlet pipe (65), spray mechanism (66) and cold water pump (67), water spray cooling trough (61) sets up in rotatory reactor (2) lower part, spray mechanism (66) and install the top at rotatory reactor (2), circulating water cooling tower (62) are connected with spray mechanism (66) through inlet tube (64), water spray cooling trough (61) pass through outlet pipe (65) with circulating water cooling tower (62) are connected, hot water pump (63) are installed on outlet pipe (65), cold water pump (67) are installed on inlet tube (64).

4. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to claim 2, characterized in that: the first heating furnace (4), the second heating furnace (5) and the cooling assembly (6) are coaxially arranged with the rotary reactor (2); the first heating furnace (4), the second heating furnace (5) and the cooling assembly (6) are arranged at intervals along the rotary reactor (2); supporting devices (7) used for supporting corresponding positions of the rotary reactor (2) are arranged outside the rotary reactor (2) at intervals; rotatory reactor (2) include reactor body (21) and rotary driving piece (22), reactor body (21) wear to locate in first heating furnace (4), second heating furnace (5) and cooling module (6) and with feed mechanism (1) and discharge mechanism (3) butt joint, rotary driving piece (22) set up in reactor body (21) outside and drive reactor body (21) rotatory.

5. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to any one of claims 1 to 4, characterized in that: the first heating furnace (4) comprises a first furnace body (41) and a first heating element (42) which is arranged on the first furnace body (41) and extends into the first furnace body, and the first furnace body (41) is arranged outside the rotary reactor (2); the second heating furnace (5) comprises a second furnace body (51) and a second heating element (52) which is arranged on the second furnace body (51) and extends into the second furnace body, and the second furnace body (51) is arranged outside the rotary reactor (2).

6. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to any one of claims 2 to 4, characterized in that: a material lifting scraper mechanism (8) which can selectively realize synchronous rotation or asynchronous rotation with the rotary reactor (2) is arranged in a reaction cavity of the rotary reactor (2); the material lifting scraper mechanism (8) is configured to selectively rotate synchronously with the rotary reactor (2) when lifting material and to selectively rotate asynchronously with the rotary reactor (2) when scraping material.

7. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to claim 6, characterized in that: raise material scraper mechanism (8) including raising material scraper blade driving piece (81), transmission shaft (82) and raise material and scrape plate spare (83), transmission shaft (82) extend in rotatory reactor (2) and are connected with raising material scraper blade driving piece (81), raise material and scrape plate spare (83) and install on transmission shaft (82).

8. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to claim 7, characterized in that: the material lifting scraper plate component (83) comprises a first material lifting scraper unit (831) arranged at the feeding end and a second material lifting scraper unit (832) arranged at the rear part, and the first material lifting scraper unit (831) and the second material lifting scraper unit (832) are arranged on the transmission shaft (82) at intervals along the material conveying direction; the material lifting device is characterized in that the first material lifting scraper blade unit (831) and the second material lifting scraper blade unit (832) are composed of cage-shaped support frames (833), and the cage-shaped support frames (833) are installed on the transmission shaft (82).

9. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to claim 8, characterized in that: a material guide barrel (8311) is arranged at the part, close to the feeding hole, of the first material raising scraper unit (831), a material guide spiral (8312) is arranged in an inner cavity of the material guide barrel (8311), and material leaking holes (83111) are uniformly formed in the barrel wall of the material guide barrel (8311); the cage-shaped support frame (833) comprises support ring frames (8331) arranged at the front end and the rear end and a material lifting scraper (8332) connected with the two support ring frames (8331).

10. The continuous reaction processing apparatus of graphite-based positive/negative electrode materials according to claim 8 or 9, characterized in that: the transmission shaft (82) is formed by connecting a plurality of short shafts (821) through movable knuckle bearings (822), a first material raising scraper unit (831) is installed on one short shaft (821) close to the feeding end, and a second material raising scraper unit (832) is installed on each subsequent short shaft (821).

11. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to any one of claims 1 to 4, characterized in that: the rotary reactor (2) is obliquely arranged, the feeding end of the rotary reactor (2) is at a high position, and the discharging end of the rotary reactor (2) is at a low position; the included angle between the axis of the rotating reactor (2) and the horizontal line is a, and a is more than 0 degree and less than or equal to 10 degrees.

12. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to any one of claims 2 to 4, characterized in that: the butt joint of the rotary reactor (2) and the feeding mechanism (1) and the discharging mechanism (3) is provided with a sealing device (9), the sealing device (9) comprises a first solid sealing group (91), a gas sealing group (92) and a second solid sealing group (93) which are circumferentially arranged along the rotary reactor (2), and the first solid sealing group (91), the gas sealing group (92) and the second solid sealing group (93) are sequentially arranged along the axial direction and form axial sealing with each other; the first solid seal group (91), the gas seal group (92) and the second solid seal group (93) each form a radial seal against the rotary reactor (2).

13. The continuous reaction treatment apparatus of graphite-based positive/negative electrode materials according to claim 12, characterized in that: the first solid sealing group (91) comprises a first static ring (911), a first elastic sealing element (912) and a first moving ring (913), the first elastic sealing element (912) is pressed between the first static ring (911) and the rotary reactor (2), the first moving ring (913) is connected with the end part of the first static ring (911) and axially compresses the first elastic sealing element (912), and the gas sealing group (92) is connected with the first moving ring (913); the gas seal group (92) comprises a second static ring (921), an inflation cavity (922) with the air pressure larger than the air pressure in the rotary reactor (2) is formed between the second static ring (921) and the rotary reactor (2), an inflation pipe (923) used for inflating the inflation cavity (922) with protective gas is arranged on the second static ring (921), and the second solid seal group (93) is connected with the second static ring (921); the second solid seal group (93) comprises a third static ring (931) and a second elastic seal (932), and a pushing element (933), the third static ring (931) is connected with the gas seal group (92), the second elastic seal (932) is pressed between the third static ring (931) and the rotary reactor (2), and the pushing element (933) is installed on the third static ring (931) and exerts radial pressure on the second elastic seal (932); the second solid seal group (93) further comprises a fourth stationary ring (934), a third elastic seal (935) and a second movable ring (936), the fourth stationary ring (934) is connected with the third stationary ring (931), the third elastic seal (935) is pressed between the fourth stationary ring (934) and the rotary reactor (2), and the second movable ring (936) is connected with the fourth stationary ring (934) in an end portion and axially compresses the third elastic seal (935).