CN212142563U

CN212142563U - Gas phase coating continuous production reaction device

Info

Publication number: CN212142563U
Application number: CN202020577296.4U
Authority: CN
Inventors: 顾灵锋; 杨丽娜; 舒显全
Original assignee: Shanghai Danyuan New Material Technology Co ltd
Current assignee: Shanghai Danyuan New Material Technology Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-12-15
Anticipated expiration: 2030-04-17

Abstract

The utility model discloses a gaseous phase cladding continuous production reaction unit belongs to lithium ion battery production technical field, and it includes the retort body, and it still includes the feed tank body that sets up with retort body feed inlet intercommunication and the ejection of compact jar body that sets up with retort body discharge gate intercommunication. The utility model discloses make the reaction tank body in continuous uninterruptedly take place the reaction, realized efficient serialization production, saved the energy effectively, improved production efficiency, more be applicable to the gaseous phase cladding reaction of nanometer granule such as nanometer silica flour to make the performance of reaction product improve, be applicable to all gaseous phase cladding reactions.

Description

Gas phase coating continuous production reaction device

Technical Field

The utility model belongs to the technical field of lithium ion battery production, a reaction unit in the preparation of lithium ion battery cathode material is related to, specifically speaking are gaseous phase cladding continuous production reaction unit.

Background

Because the lithium ion battery has the advantages of high energy density, small self-discharge, wide working voltage range, no memory effect, long service life, no environmental pollution and the like, the lithium ion battery is widely applied to the fields of electronic products, electric automobiles and energy storage. The performance of the lithium ion battery depends on the performance of the electrode to a great extent, so the production and preparation process of the electrode is a very critical link in the production process of the lithium ion battery.

The application of the negative electrode material is mainly based on the traditional graphite material, but the specific capacity of the graphite is close to the theoretical value of 372mAh/g, so that the space is difficult to be improved, the energy density of the lithium ion battery is limited, and the increasing energy density requirement is difficult to meet. Therefore, carbon-coated nano silicon materials have been the popular material for lithium ion battery negative electrodes and the current research of lithium ion batteries in recent years due to their advantages of small volume expansion, high capacity, long cycle life, and the like.

Among the preparation methods of the carbon-coated nano silicon material, the gas-phase coating method is widely applied to the preparation of the lithium ion battery cathode material because the process is simple, the cost is low, the large-scale production is easy, and the obtained carbon-coated nano silicon material has better performance. The common reaction device coated by the gas phase mainly comprises a rotary furnace or a rotary kiln, the reaction process comprises the steps of displacement, temperature rise, reaction and temperature reduction, the last three steps are carried out in the environment after oxygen discharge displacement, so the reaction steps in the prior art are all carried out in the same container, the reaction can be carried out after the oxygen discharge displacement and the temperature rise, the temperature reduction is carried out in the same container after the reaction, the reaction product is discharged along an inclined reaction long pipe by the aid of the gravity of the reaction product after the temperature reduction is finished, and the reaction product is discharged and then subjected to a new round of displacement and temperature rise. In continuous production, the production mode is low in efficiency, energy waste is caused by repeated heating and cooling, certain requirements are imposed on the bulk density of raw materials by a discharging mode depending on the gravity of reaction products, and the nano silicon powder is usually low in bulk density and difficult to discharge.

SUMMERY OF THE UTILITY MODEL

For solving exist among the prior art more not enough, the utility model aims at providing a gaseous phase cladding continuous production reaction unit to reach the gaseous phase cladding reaction that can more be applicable to nanometer silica flour, and the make full use of energy realizes continuous production, improves production efficiency's purpose.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a gaseous phase cladding continuous production reaction unit, it includes the retort body, it still includes the feeding jar body that sets up with retort body feed inlet intercommunication and the ejection of compact jar body that sets up with retort body discharge gate intercommunication.

As to the utility model limit: the inner containers of the reaction tank body, the feeding tank body and the discharging tank body are all provided with vent holes for enabling air flow to be uniform.

As to the utility model limit: the discharge gate of the feeding tank body is communicated with the feed inlet of the reaction tank body through a first communicating pipe, and the discharge gate of the reaction tank body is communicated with the feed inlet of the discharging tank body through a second communicating pipe.

As to the utility model limit: and the reaction tank body is also communicated with a waste gas absorption tower.

As a further limitation to the present invention: the air vents are uniformly distributed on the end faces of the feed inlet and the discharge outlet of the reaction tank body, the feed tank body and the discharge tank body inner container.

As a further limitation to the present invention: a first powder pump is fixedly arranged on the first communicating pipe, and a second powder pump is fixedly arranged on the second communicating pipe.

As to the utility model discloses a further limit again: the air vent still sets up the one end that is close to the discharge gate at retort body, the feeding jar body, the internal container lateral wall of ejection of compact jar, is the linear strip along the internal container axial and distributes.

Since the technical scheme is used, compared with the prior art, the utility model, the beneficial effect who gains lies in:

(1) the utility model discloses reactor tank body feed inlet intercommunication is provided with the feed tank body, the discharge gate intercommunication is provided with the ejection of compact jar body, can take place in separating the replacement step in the reaction to the feed tank body, take place in separating the cooling step in the reaction to the ejection of compact jar body, make the internal temperature of reactor tank keep in suitable within range, the raw materials of waiting to react let in the reactor tank body after the displacement oxygen removal of feed tank body, directly let in reaction gas under the temperature environment of the reactor tank body and take place the reaction, pass through the product to the ejection of compact jar body and cool down after the reaction is accomplished, the raw materials of waiting to react after the next batch of replacement is accomplished to this moment in the reactor tank body, the step of intensification has not only been saved, and can make the continuous reaction taking place uninterruptedly in the reactor tank body, high-efficiency serialization production has been;

(2) the inner containers of the reaction tank body, the feeding tank body and the discharging tank body are all provided with the air vents, so that the introduced and flowed air flow can be more uniform, the introduced air can be fully diffused in the inner container, the contact surface between the reaction gas and the material to be reacted can be increased, the material to be reacted and the introduced air can be fully reacted, the reaction efficiency is greatly improved, and the performance of a reaction product is improved;

(3) the utility model discloses a reaction raw materials and reaction product realize letting in and discharge through the powder pump, and this kind of mode is lower for prior art to bulk density's requirement, more is applicable to the gaseous phase cladding reaction of nanometer granules such as nanometer silica flour.

To sum up, the utility model discloses make the internal continuous uninterruptedly of retort react, realized efficient serialization production, saved the energy effectively, improved production efficiency, more be applicable to the gaseous phase cladding reaction of nanometer granules such as nanometer silica flour to make the performance of reaction product obtain improving, be applicable to all gaseous phase cladding reactions.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic front view of an embodiment of the present invention;

FIG. 2 is a schematic view of the inner container according to the embodiment of the present invention;

fig. 3 is a schematic bottom view of the embodiment of the present invention shown in fig. 2.

In the figure: 1-a feeding tank body, 2-a reaction tank body, 3-a discharging tank body, 4-a feeding air inlet, 5-a first valve, 6-a first exhaust port, 7-a first communicating pipe, 8-a powder inlet and outlet, 9-a second valve, 10-a first powder pump, 11-a third valve, 12-a second communicating pipe, 13-a second powder pump, 14-a fourth valve, 15-a reaction gas inlet, 16-a waste gas absorption tower, 17-a second exhaust port, 18-a fifth valve, 19-a third exhaust port, 20-a sixth valve, 21-a discharge port, 22-a seventh valve, 23-an air inlet, 24-a fourth exhaust port and 25-an air vent.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the gas phase coating continuous production reactor apparatus described herein is a preferred embodiment, is provided only for the purpose of illustration and explanation of the present invention, and does not constitute a limitation of the present invention.

The terms such as "upper", "lower", "left", "right" and the like or the positional relationship of the present invention are based on the positional relationship of fig. 1 and fig. 2 of the drawings of the present invention, and are only for convenience of description of the present invention and for simplification of description, and are not intended to indicate or imply that a device or an element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the protection of the present invention.

Example gas phase coating continuous production reaction apparatus

Fig. 1-3 show a gas-phase coating continuous production reaction apparatus, which includes a reaction tank 2, in this embodiment, a feed inlet and a discharge outlet of the reaction tank 2 are disposed at one location to form a powder inlet/outlet 8, the present embodiment further includes a feed tank 1 communicated with the powder inlet/outlet 8 of the reaction tank 2, and a discharge tank 3 communicated with the powder inlet/outlet 2 of the reaction tank 2. The shapes of the feeding tank body 1, the reaction tank body 2 and the discharging tank body 3 are consistent, the side walls are cylindrical surfaces, the upper end surfaces are conical surfaces with upward tips, and the lower end surfaces are conical surfaces with downward tips.

The materials to be reacted enter from the feeding tank body 1 and are subjected to oxygen discharge replacement in the feeding tank body 1. The pan feeding air inlet 4 of the feeding tank body 1 is arranged on the upper end face of the feeding tank body 1, a first valve 5 is arranged on the pan feeding air inlet 4, and a first exhaust port 6 is further formed in the upper end face. The discharge gate of the feeding tank body 1 is communicated with the powder inlet and outlet 8 of the reaction tank body 2 through a first communication pipe 7, one end of the first communication pipe 7 close to the feeding tank body 1 is provided with a second valve 9, the first communication pipe 7 is also fixedly provided with a first powder pump 10, a material to be reacted, which is introduced into the reaction tank body 2 from the feeding tank body 1, is introduced into the reaction tank body 2 through the first powder pump 10, and one end of the first communication pipe 7 close to the reaction tank body 2 is provided with a third valve 11.

The materials to be reacted and the products after the reaction are discharged from the reaction tank 2, which are introduced into the reaction tank 2, are discharged through the powder inlet and outlet 8, the powder inlet and outlet 8 is arranged on the lower end surface of the reaction tank 2, the connecting pipes of the powder inlet and outlet 8 extend out of the reaction tank 2 and are divided into two parts, one of which is a first communicating pipe 7, and the other is a second communicating pipe 12. The second communicating pipe 12 is communicated with the feed inlet of the discharge tank body 3. A second powder pump 13 is fixedly arranged on the second communicating pipe 12, and the reaction product discharged from the reaction tank body 2 is discharged through the second powder pump 13 and is introduced into the discharge tank body 3. A fourth valve 14 is provided at an end of the second communication pipe 12 adjacent to the reaction tank body 2.

The lower end face of the reaction tank body 2 is also provided with a reaction gas inlet 15, and reaction gas is introduced from the inlet and reacts with the material to be reacted. The upper end surface of the reaction tank body 2 is communicated with a waste gas absorption tower 16, a second exhaust port 17 is arranged on the waste gas absorption tower 16, and a fifth valve 18 is arranged between the reaction tank body 2 and the waste gas absorption tower 16. The upper end surface of the reaction tank body 2 is also provided with a third air outlet 19, and the third air outlet 19 is provided with a sixth valve 20.

The product after the reaction flows to the discharging tank body 3 through the second communicating pipe 12, the cooling step is completed in the discharging tank body 3, and the final product is discharged through the discharging port 21. In this embodiment, the discharge tank 3 is cooled by water. The discharge port 21 is arranged on the lower end face of the discharge tank body 3, and a seventh valve 22 is arranged on the discharge port 21. The discharging tank body 3 is also provided with an air inlet 23 and a fourth air outlet 24, the air inlet 23 is arranged on the lower end face of the discharging tank body 3, and the fourth air outlet 24 is arranged on the upper end face of the discharging tank body 3.

The inner containers of the reaction tank body 1, the feeding tank body 2 and the discharging tank body 3 are all provided with vent holes 25 for enabling air flow to be uniform. The air vents 25 are uniformly distributed on the upper end surfaces and the lower end surfaces of the three tank inner containers and the lower half parts of the inner container side walls, wherein the air vents 25 arranged on the lower half parts of the inner container side walls are distributed in a linear shape along the vertical direction.

When the method is used, the temperature of the reaction tank body 2 is set to 600-1100 ℃, the inert gas is introduced from the reaction gas inlet 15 for replacement for 10-60 min, the nano silicon powder is put into the feeding gas inlet 4 of the feeding tank body 1, and the inert gas is introduced for replacement for 10-60 min; then, the replaced nano silicon powder is conveyed to a reaction tank body 2 through a first powder pump 10, carbon source gas is introduced from a reaction gas inlet 15 for gas phase coating reaction for 30-60 min, and meanwhile, new nano silicon powder can be added into a feeding tank body 1 for replacement; finally, the product after the reaction is conveyed to the discharging tank body 3 through the second powder pump 13 to be cooled, meanwhile, new nano silicon powder can be introduced into the reaction tank body 2 to react, inert gas protection is also needed in the discharging tank body 3, gas enters from the gas inlet 23 and is discharged from the fourth gas outlet 24, the cooled final reaction product is discharged from the discharge port 21, and meanwhile, the discharging tank body 3 can be cooled by introducing new reaction product.

Claims

1. The utility model provides a gaseous phase cladding continuous production reaction unit, it includes the retort body, its characterized in that: it still includes the feeding tank body that sets up with retort body feed inlet intercommunication and the ejection of compact jar body that sets up with retort body discharge gate intercommunication.

2. The gas-phase coating continuous production reactor according to claim 1, wherein: the inner containers of the reaction tank body, the feeding tank body and the discharging tank body are all provided with vent holes for enabling air flow to be uniform.

3. The gas-phase coating continuous production reactor according to claim 2, characterized in that: the air vents are uniformly distributed on the end faces of the feed inlet and the discharge outlet of the reaction tank body, the feed tank body and the discharge tank body inner container.

4. The gas-phase coating continuous production reactor according to claim 3, characterized in that: the air vent still sets up the one end that is close to the discharge gate at retort body, the feeding jar body, the internal container lateral wall of ejection of compact jar, is the linear strip along the internal container axial and distributes.

5. The gas-phase-coating continuous-production reaction device according to any one of claims 1 to 4, wherein: the discharge gate of the feeding tank body is communicated with the feed inlet of the reaction tank body through a first communicating pipe, and the discharge gate of the reaction tank body is communicated with the feed inlet of the discharging tank body through a second communicating pipe.

6. The gas-phase coating continuous production reactor according to claim 5, wherein: a first powder pump is fixedly arranged on the first communicating pipe, and a second powder pump is fixedly arranged on the second communicating pipe.

7. The gas-phase-coating continuous production reactor according to any one of claims 1 to 4 and 6, wherein: and the reaction tank body is also communicated with a waste gas absorption tower.

8. The gas-phase coating continuous production reactor according to claim 5, wherein: and the reaction tank body is also communicated with a waste gas absorption tower.