CN210736221U

CN210736221U - Quick removable formula row material cooling system

Info

Publication number: CN210736221U
Application number: CN201921603048.6U
Authority: CN
Inventors: 张瑞林; 陈国教
Original assignee: Kaifeng Greyfont New Materials Co Ltd
Current assignee: Kaifeng Ruifeng New Material Co.,Ltd.
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-06-12
Anticipated expiration: 2029-09-24

Abstract

The utility model discloses a quick removable formula discharge system cools off, the problem of solution be that the discharge system discharge gate of graphitizing furnace in case damage, need the shut down to change, greatly increased enterprise manufacturing cost. The utility model discloses a connecting plate, connecting plate top are connected with cooling system's tertiary water jacket, and the connecting plate below is equipped with level four water jacket and five-stage water jacket, connects through the toper water jacket between level four water jacket and the five-stage water jacket. The utility model discloses arrange material cooling system and be provided with two sets, two sets of systems can easily be changed, reduce and shut down the maintenance number of times, reduce the cost in business.

Description

Quick removable formula row material cooling system

Technical Field

The invention relates to the field of lithium battery negative electrode material production, in particular to a quick replaceable discharging and cooling system of a furnace kiln for vertical continuous lithium battery negative electrode material production.

Background

In the lithium ion battery cathode material, the graphite carbon cathode material is always the main type of cathode material due to wide source and low price; the carbon material is a main raw material of a graphite lithium battery cathode material, carbon atoms of the carbon material are irregularly arranged, and the carbon atoms are recrystallized and rearranged in order only by high-temperature heat treatment at 2200-3000 ℃ in a furnace kiln such as a graphitizing furnace, so that the graphite lithium battery cathode material can present a graphite crystal structure, and has a plurality of excellent performances of graphite, such as obviously improved electrical conductivity and thermal conductivity, better chemical and thermal stability, reduced impurities, reduced hardness, easier machining and the like. The graphitizing furnace has the function of converting carbonaceous materials into artificial graphite materials, such as graphite materials which can provide high-quality carbon elements for iron and steel smelting, aluminum smelting, cathode materials, other non-ferrous metal industries, nuclear industry and the like.

The most widely used graphitization furnace at present is the acheson furnace. The Acheson furnace is of an open type rectangular furnace body structure, the production process comprises the steps of longitudinally or transversely paralleling carbonized materials, filling metallurgical coke and quartz sand around the carbonized materials, electrifying in the length direction of the furnace body, utilizing resistance heating of the coke, and finally enabling the heated object to generate resistance heating; and lining materials such as coke powder, carbon black, silica sand/coke/silicon carbide mixture and the like are used for heat shielding at the periphery of the coke so as to insulate heat. However, the existing Acheson furnace can not meet the requirements of energy conservation and emission reduction, safe operation and stable product quality.

Traditional graphitizing furnace's discharge system does not have cooling function, and all sets up a discharge gate, and in case the discharge gate damages, need the shut down to change, in continuous graphitizing furnace's production process, the reproduction needs the consumption time long after the shut down, need heat up the intensification to the stove kiln reheating, greatly increased enterprise manufacturing cost, and seriously influence production efficiency.

Disclosure of Invention

The invention aims to solve the technical problem that once a discharge port of a discharge system of a graphitization furnace is damaged, production stop and replacement are needed, so that the production cost of enterprises is greatly increased, and the quick replaceable discharge cooling system is simple in structure and long in service life.

In order to solve the technical problems, the invention adopts the following technical scheme: a quick replaceable discharging cooling system comprises a connecting plate and a supporting frame, wherein the upper part of the connecting plate is connected with a three-stage water jacket of the cooling system, a four-stage water jacket and a five-stage water jacket are arranged below the connecting plate, and the four-stage water jacket and the five-stage water jacket are connected through a conical water jacket; the support frame comprises an upright post, and a movable cross beam is arranged on the upright post.

The four-stage water jacket and the five-stage water jacket are both in cylindrical structures.

Two four-stage water jackets are arranged below the connecting plate, and pulleys are arranged on the lower surface of the connecting plate; the movable beam is arranged below the three-stage water jacket, a sliding rail is arranged on the movable beam, and the pulley is matched with the sliding rail.

And a square plate is arranged below the three-stage water jacket, two cover plates are arranged on two sides of the square plate, and the cover plates are hinged with the square plate.

The discharge cooling system is provided with two sets, and the two sets of systems can be replaced easily, so that the shutdown maintenance frequency is reduced, and the enterprise cost is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic top view of the furnace lid of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure of the furnace lid of the present invention;

FIG. 5 is a schematic side view of the furnace lid according to the present invention;

FIG. 6 is a second schematic side view of the lid according to the present invention;

FIG. 7 is a schematic view of the discharge cooling configuration of the present invention;

FIG. 8 is a schematic view of the lower structure of a three-stage water jacket according to the present invention;

FIG. 9 is a schematic top view of the discharge cooling of the present invention.

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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 to 9, a quick replaceable discharging cooling system comprises a connecting plate 34 and a support frame 5, wherein the upper part of the connecting plate 34 is connected with a three-stage water jacket 23 of the cooling system, the lower part of the connecting plate 34 is provided with a four-stage water jacket 31 and a five-stage water jacket 32, and the four-stage water jacket 31 and the five-stage water jacket 32 are connected through a conical water jacket 33; the support frame 5 comprises a vertical column 51, and a movable cross beam 53 is arranged on the vertical column 51.

The four-stage water jacket 31 and the five-stage water jacket 32 are both in cylindrical tube structures. The material passes through the middle of the cylinder.

The four-stage water jacket 31, the conical water jacket 33 and the five-stage water jacket 32 are respectively provided with an independent water inlet and an independent water outlet, so that cooling is carried out in a grading manner, and the cooling effect is good. The discharging cooling system 3 is used as a part of the cooling system, the cooling system is greatly lengthened, the cooling distance of the material during falling is increased, the cooling effect is increased, the structure is simple, all levels of cold area water jackets and the discharging cooling system 3 can be connected through simple fixing, the structure is simple, and the service life is long.

Two four-stage water jackets 31 are arranged below the connecting plate 34, and pulleys 35 are arranged on the lower surface of the connecting plate 34; the movable beam 53 is arranged below the three-stage water jacket 23, a slide rail 531 is arranged on the movable beam 53, and the pulley 35 is matched with the slide rail 531. The pulley 35 moves in the slide rail 531, and the butt joint of any one of the four-stage water jacket 31 and the three-stage water jacket 23 on the connecting plate 34 is realized.

Three-level water jacket 23 below be equipped with square board 232, square board 232 both sides are equipped with two apron 231, apron 231 is connected with square board 232 is articulated. When the feeding port of one fourth-stage water jacket 31 on the connecting plate 34 is selected to correspond to the blanking port of the third-stage water jacket 23, the feeding port of the other fourth-stage water jacket 31 on the connecting plate 34 is covered by the corresponding cover plate 231, so that the four-stage water jacket 31 is protected.

According to the invention, two discharging cooling systems are arranged under one connecting plate 34 in a matched manner, when one discharging cooling system is damaged, only a slight push is needed, the feed inlet of the four-stage water jacket 31 of the other discharging cooling system can correspond to the blanking port of the three-stage water jacket 23, the operation process is rapid and simple, the loss caused by shutdown to an enterprise is avoided, the working efficiency is improved, and the production cost is reduced.

The invention is used for a vertical continuous furnace kiln for producing lithium battery cathode materials, the furnace kiln comprises a furnace body 1 and a support frame 5, a furnace cover 4 is arranged above the furnace body, a cooling system 2 is arranged below the furnace body 1, and a discharging cooling system 3 is arranged at the lower part of the cooling system 2; the support frame 5 comprises a vertical column 51, a beam 52 is arranged on the vertical column 51, and the furnace body 1 is arranged above the beam 52.

The furnace cover 4 is of an upward convex spherical structure, the furnace cover 4 comprises a plurality of fan-shaped blocks 41, arc-shaped grooves 42 are formed in the vertex angles of the fan-shaped blocks 41, and outer layer holes 43 and inner layer holes 44 are formed in the fan surfaces of the fan-shaped blocks 41. The furnace cover assembled by the fan-shaped blocks 41 has integrity, the normal service life of the furnace cover reaches 8-10 years, and the service life of the furnace cover is greatly prolonged.

The vertical distance h between the highest lower surface 49 of the inner surface of the furnace lid 4 is greater than 450 mm. The vertical distance between the highest position of the inner surface of the furnace cover 4 with the spherical structure and the lower surface 49 is 500mm, the thickness of the sector block 41 is 180-220mm, the distance between the furnace cover body and the high-temperature zone of the furnace body is increased, the furnace cover cannot be damaged even if the temperature in the furnace body reaches more than 2800 ℃, the temperature of the furnace body is higher, and the graphitization degree of the product is greatly improved. The graphitization degree of the lithium battery cathode material produced by the method reaches 96%, the carbon content reaches more than 99%, while the graphitization degree of the lithium battery cathode material prepared by the traditional process only reaches about 90%, and the carbon content is only within 99%. The quality of the lithium battery cathode material prepared by the invention is greatly improved.

The furnace kiln designed by the invention greatly shortens the desulfurization time, the traditional furnace kiln needs 6-7 hours for desulfurization, the sulfur content after desulfurization is 0.05-1.5%, the desulfurization of the invention only needs 3-4 hours, and the sulfur content of the finished product is detected to be within 0.05%.

The number of the fan-shaped blocks 41 is 4, the central angle of each fan-shaped block is 90 degrees, and the arc-shaped grooves 42 of the four fan-shaped blocks 41 form a circular electrode hole 45; the positive electrode of the kiln is inserted in the electrode hole 45 and used for discharging electricity to the inside of the kiln.

Each sector 41 is provided with an inner layer hole 44 and two outer layer holes 43. The four fan-shaped blocks 41 are provided with four inner layer holes 44 and eight outer layer holes 43, wherein two inner layer holes 44 are used for the insertion holes of the flue pipe of the kiln, and the other two inner layer holes 44 are used for the insertion holes of the explosion-proof air bag of the kiln; eight outer holes 43 are used for the insertion holes of the material feeding pipeline. The sector block of the invention can be three, five, six, etc., and the corresponding number of the outer layer holes 43 and the inner layer holes 44 is required to be reserved.

A bulge 46 is arranged on one side of each sector 41, a groove 47 is arranged on the other side of each sector 41, adjacent sectors 41 are connected through the matching of the bulge 46 and the groove 47, and heat insulation cotton 48 is arranged between the bulge 46 and the groove 47 of each adjacent sector 41. The external dimension of the protrusion 46 is matched with the internal dimension of the groove 47, and when the fan-shaped fan is installed, the protrusion of one fan-shaped block 41 is clamped into the groove of the adjacent; the heat insulation cotton 48 is arranged to fill the gap between the bulge 46 and the groove 47 of the adjacent fan-shaped block 41, and simultaneously, the heat insulation effect is achieved, and heat leakage from the gap between the bulge 46 and the groove is prevented.

The lower surface 49 of the outer side of the sector block 41 is a plane and is used for matching with the upper surface of the furnace body 1. The fan-shaped blocks 41 can be stably arranged on the furnace body.

The cooling system 2 comprises a plurality of stages of cooling water jackets, the cooling water jackets sequentially comprise a first-stage water jacket 21, a second-stage water jacket 22 and a third-stage water jacket 23 from top to bottom, the third-stage water jacket 23 is connected with the discharging cooling system 3, the cross sectional area of the first-stage water jacket 21 is larger than that of the second-stage water jacket, and an annular cooling water disc 26 is arranged between the upper part of the second-stage water jacket 22 and the first-stage water jacket 21. The upper part of the primary water jacket 21 is connected with the furnace body. Each stage of cooling water jacket of the cooling system 2 comprises cooling water pipes, cooling water passes through the cooling water pipes and is not full of the whole cooling water jacket, and each cooling water jacket is provided with an independent water inlet and an independent water outlet, so that a layered cooling device is formed, the cost is reduced, and the cooling efficiency is improved.

The inside of the annular cooling water disk 26 is formed by winding cooling water pipes one by one. The annular cold water plate has a larger cooling area and is suitable for high-temperature products with higher cooling temperature, and the annular cold water plate is arranged between the first-stage water jacket and the second-stage water jacket, so that high-temperature materials coming out of the first-stage water jacket are greatly cooled, then the materials are gradually cooled through the second-stage water jacket, the third-stage water jacket and the discharging cooling system, the cooling level is clear, the cooling division is clear, the cooling efficiency is improved, and the cooling effect is optimized.

And graphite lining layers 27 are arranged on the inner walls of the secondary water jacket 22 and the tertiary water jacket 23. The graphite lining layer 27 has good heat transfer effect and fast heat transfer, accelerates the heat exchange speed between the material and the cooling water, and is suitable for the two-stage water jacket 22 area and the three-stage water jacket 23 area with higher material temperature. And the graphite lining layer 27 is not arranged in the region of the primary water jacket 21, because the material which just falls from the furnace body is primarily cooled in the region of the primary water jacket, the cooling strength cannot be too large. The temperature of the lower electrode of the furnace body is prevented from being influenced, the lower electrode is protected, the furnace body is prevented from exploding, and the temperature of high-temperature materials is preliminarily reduced.

The primary water jacket 21, the secondary water jacket 22 and the tertiary water jacket 23 are all in a cylindrical structure.

The utility model discloses because 500mm has been increased to the bell, and adopts the overall structure design for the high temperature resistance of bell increases, and has prolonged the high temperature region of furnace body, makes the interior temperature of stove can reach more than 2800 ℃, and after the interior temperature reached 2800 ℃, the graphitization degree of material increased greatly in the stove, and the carbon content increases, and metallic impurity becomes few, and product quality has obtained qualitative leap.

Adopt the graphite that above-mentioned technical scheme produced, each item data is obviously superior to national standard, and because each item data of the lithium cell negative pole material of producing with other technologies of trade, the utility model discloses the concrete detection data of the graphite that 4 batches were produced see table 1 below:

table 1: the invention discloses a specific detection data table of graphite produced in batches

Claims

1. A quick replaceable blowdown cooling system characterized by: the cooling system comprises a connecting plate (34) and a support frame (5), wherein the upper part of the connecting plate (34) is connected with a three-stage water jacket (23) of the cooling system, a four-stage water jacket (31) and a five-stage water jacket (32) are arranged below the connecting plate (34), and the four-stage water jacket (31) and the five-stage water jacket (32) are connected through a conical water jacket (33); the support frame (5) comprises an upright post (51), and a movable cross beam (53) is arranged on the upright post (51).

2. The quick replaceable drain cooling system of claim 1, wherein: the four-stage water jacket (31) and the five-stage water jacket (32) are both in cylindrical tube structures.

3. The quick replaceable drain cooling system of claim 2, wherein: two four-stage water jackets (31) are arranged below the connecting plate (34), and pulleys (35) are arranged on the lower surface of the connecting plate (34); the movable beam (53) is arranged below the three-stage water jacket (23), a sliding rail (531) is arranged on the movable beam (53), and the pulley (35) is matched with the sliding rail (531).

4. The quick replaceable drain cooling system of claim 3, wherein: tertiary water jacket (23) below be equipped with square board (232), square board (232) both sides are equipped with two apron (231), apron (231) are connected with square board (232) are articulated.