CN218764517U

CN218764517U - Nitrogen protection device for tunnel carbide furnace of cathode material

Info

Publication number: CN218764517U
Application number: CN202222830445.5U
Authority: CN
Inventors: 陈正东; 陈泽林
Original assignee: Huanggang City Zhongji Kiln Co ltd
Current assignee: Huanggang City Zhongji Kiln Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-28
Anticipated expiration: 2032-10-26

Abstract

The utility model discloses a nitrogen protection device of negative pole material tunnel carbide furnace, it has solved prior art and has had the cold wind rapid cooling in-process to take place secondary oxidation easily and influence product quality scheduling problem, its characterized in that: the tail part of the high-temperature zone and the front part of the cooling zone are provided with a nitrogen protection device and a cold air quenching device, the nitrogen protection device is composed of a nitrogen inlet (4), a nitrogen supply main pipe (5), a nitrogen branch pipe (6), a nitrogen regulating valve (7) and an air spraying pipe (8), and the cold air quenching device is composed of a quenching fan (9), a cold air main pipe (10) and a cold air branch pipe (11). The device has the advantages of reasonable structure, simplicity in operation, capability of preventing products from being oxidized, improvement on product quality and the like, can be widely applied to the tunnel carbide furnace made of the negative electrode material, and can bring good economic and social benefits to enterprises when being popularized and applied.

Description

Nitrogen protection device for tunnel carbonization furnace of cathode material

Technical Field

The utility model belongs to thermal equipment field especially relates to a nitrogen protection device of negative pole material tunnel carbide furnace.

Background

With the rapid development of the domestic lithium battery industry, a novel cathode material tunnel carbonization furnace is produced. The negative electrode material is loaded in a crucible on a furnace car, a layer of carbon fiber felt with the thickness of 10mm is covered on the surface of the negative electrode material, calcined coke with the thickness of 20-30 mm and the particle size of 1-3 mm is filled in the crucible for sealing, a gap between the crucible and a cover is sealed by high-temperature fibers, and the diameter of the fiber felt is slightly larger than the inner diameter of the crucible by 10-20 mm. Under the protection measures, the negative electrode material produces qualified graphitized products through high-temperature roasting. After the high-temperature roasting of the cathode material tunnel carbonization furnace, the product enters a cooling zone, a rapid cooling air device is arranged at the tail part of the high-temperature zone and the front part of the cooling zone, and cold air is sent into the tunnel carbonization furnace through a fan pipeline to cool the outer wall of the crucible. Because the cold air contains a lot of oxygen, the product is easy to generate secondary oxidation under the action of the oxygen, and the quality of the cathode product is influenced.

Disclosure of Invention

The utility model aims at providing a rational in infrastructure, easy operation, prevent product oxidation, improve the nitrogen protection device of negative pole material tunnel carbide furnace of product quality.

The technical scheme of the utility model is that: the device comprises a furnace body metal frame, a nitrogen pipeline, a valve, a crucible and the like, wherein the crucible is loaded on a furnace car, and a nitrogen protection device and a cold air quenching device are arranged at the tail part of a high-temperature belt and the front part of a cooling belt. The nitrogen protection device is composed of a nitrogen inlet, a nitrogen supply main pipe, a nitrogen branch pipe, a nitrogen regulating valve and an air injection pipe, wherein the nitrogen supply main pipe is fixedly arranged on the top of a metal frame of the furnace body, the air injection pipe is arranged at the tail part of a high-temperature zone and the top part of a front hearth of a cooling zone and is communicated with the nitrogen supply main pipe through the nitrogen branch pipe, the nitrogen regulating valve is arranged on the nitrogen branch pipe, and the nitrogen inlet is connected with a nitrogen injection machine through a pipeline and a regulating valve. The cold air quenching device is composed of a quenching fan, a cold air main pipe and a cold air branch pipe, wherein the cold air main pipe is fixedly arranged above a metal frame at the tail part of a high-temperature zone and the front part of a cooling zone of the furnace body and is connected with the quenching air, the cold air branch pipe is arranged on the inner wall of the furnace wall, the upper end of the cold air branch pipe is connected with the cold air main pipe, and a cold air hole is arranged at the middle lower part of the corresponding crucible.

Furthermore, four gas injection pipes are arranged at the tail part of the high-temperature belt and the front part of the cooling belt, two ends of each gas injection pipe are closed, the distance between gas injection holes at two ends is 85mm from the end part, 3 gas injection holes are correspondingly arranged above each crucible, the distance between the gas injection holes is 140mm, and the distance between the gas injection holes between the two crucibles is 240mm.

The utility model has the advantages that: as nitrogen is fed into the periphery of the upper cover of the crucible, the product in the crucible is protected to prevent oxygen from entering the crucible. The cold air cooling method is still adopted at the middle lower part of the crucible. Therefore, the purpose of cooling the crucible and the product is achieved, and the product in the crucible is protected. Has the advantages of reasonable structure, simple operation, product oxidation prevention, product quality improvement and the like, and has wide popularization and application values.

The present invention will be further described with reference to the accompanying drawings.

Drawings

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

fig. 2 is a schematic view of the nitrogen protection device of the present invention.

In the figure: 1 is a furnace body metal frame, 2 is a furnace carriage, 3 is a crucible, 4 is a nitrogen inlet, 5 is a nitrogen supply main pipe, 6 is a nitrogen branch pipe, 7 is a nitrogen regulating valve, 8 is an air injection pipe, 9 is a quenching fan, 10 is a cold air main pipe, 11 is a cold air branch pipe, 12 is an air injection hole, and 13 is a cold air hole.

Detailed Description

As shown in figure 1, negative pole material tunnel carbide furnace's nitrogen protection device includes spare parts such as furnace body metal crate 1, nitrogen gas pipeline, valve and stove car 2, takes the anterior nitrogen protection device and cold wind rapid cooling device that set up in tail, cooling zone at high temperature, nitrogen gas protection device is by nitrogen gas entry 4, supply nitrogen gas to be responsible for 5, nitrogen gas branch pipe 6, nitrogen gas governing valve 7 and jet-propelled pipe 8 etc. and constitute, supplies nitrogen gas to be responsible for 6 fixed mounting on furnace body metal crate 1 tops, and jet-propelled pipe 8 sets up at high temperature area afterbody, the anterior furnace top in cooling zone, is responsible for 5 with supplying nitrogen gas through nitrogen gas branch pipe 6 and communicates with each other, has set up nitrogen gas governing valve 7 on nitrogen gas branch pipe 6, and nitrogen gas entry 4 links to each other with notes nitrogen machine through pipeline and governing valve. Four gas nozzles 8 are arranged at the tail part of the high-temperature zone and the front part of the cooling zone, two ends of each gas nozzle 8 are closed, gas nozzles 12 at two ends are 85mm away from the end part, 3 gas nozzles 12 are correspondingly arranged above each crucible 3, the distance between the gas nozzles is 140mm, and the distance between the gas nozzles 12 between the two crucibles 3 is 240mm. The cold-air quenching device comprises a quenching fan 9, a cold-air main pipe 10, a cold-air branch pipe 11 and the like, wherein the cold-air main pipe 10 is fixedly arranged at the tail part of the high-temperature zone of the furnace body and above the metal frame 1 at the front part of the cooling zone and is connected with the quenching fan 9, the cold-air branch pipe 11 is arranged on the inner wall of the furnace wall, the upper end of the cold-air branch pipe is communicated with the cold-air main pipe 10, and a cold-air hole 13 is arranged at the position corresponding to the middle lower part of the crucible.

When the utility model is implemented, enough nitrogen is prepared in the front part of the cooling zone; the nitrogen consumption in the furnace is 100-200 m ³ Between/h; feeding nitrogen into the tunnel carbonization furnace through a pipeline and an adjusting valve by using a nitrogen injection machine, wherein the feeding point is positioned around the crucible cover to form a nitrogen protection area; with the continuous entering of nitrogen, an oxygen-free area is formed near the crucible cover, oxygen cannot enter the crucible, and the possibility of contact with products in the crucible is avoided, so that the problem of secondary oxidation of the products is solved; the nitrogen enters the top of the crucible on the cooling belt furnace car, the concentration reaches a certain degree, the space around the crucible cover can be covered, a protection area is formed, the cathode product is protected from being oxidized, meanwhile, the nitrogen protection device is used for achieving the purpose of cooling, and the nitrogen cooling device can achieve two purposes with one stroke.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a nitrogen protection device of negative pole material tunnel carbide furnace, it includes furnace body metal crate (1), nitrogen gas pipeline, valve, stove car (2), its characterized in that: the nitrogen protection device and the cold air quenching device are arranged at the tail part of the high-temperature zone and the front part of the cooling zone, the nitrogen protection device is composed of a nitrogen inlet (4), a nitrogen supply main pipe (5), a nitrogen branch pipe (6), a nitrogen regulating valve (7) and an air injection pipe (8), the nitrogen supply main pipe (5) is fixedly arranged on the top of a furnace body metal frame (1), the air injection pipe (8) is arranged at the tail part of the high-temperature zone and the top of a furnace hearth at the front part of the cooling zone and is communicated with the nitrogen supply main pipe (5) through the nitrogen branch pipe (6), the nitrogen regulating valve (7) is arranged on the nitrogen branch pipe (6), and the nitrogen inlet (4) is connected with a nitrogen injection machine through a pipeline and a regulating valve; the cold wind rapid cooling device is composed of a rapid cooling fan (9), a cold wind main pipe (10) and a cold wind branch pipe (11), wherein the cold wind main pipe (10) is fixedly arranged above a metal frame (1) at the tail part of a high-temperature zone and the front part of a cooling zone of the furnace body and is connected with the rapid cooling fan (9), the cold wind branch pipe (11) is arranged on the inner wall of the furnace wall, the upper end of the cold wind branch pipe is communicated with the cold wind main pipe (10), and a cold wind hole (13) is arranged at the position corresponding to the middle lower part of the crucible.

2. The nitrogen protection device of the tunnel carbonization furnace for anode material according to claim 1, wherein: four gas injection pipes (8) are arranged at the tail part of the high-temperature belt and the front part of the cooling belt, two ends of each gas injection pipe (8) are closed, gas injection holes (12) at two ends are 85mm away from the end part, 3 gas injection holes (12) are correspondingly arranged above each crucible (3), the distance between the gas injection holes is 140mm, and the distance between the gas injection holes (12) between the two crucibles (3) is 240mm.