Lithium iron phosphate atmosphere furnace capable of uniformly discharging gas

Abstract

An air inlet structure comprises an air inlet chamber arranged at the bottom of a combustion chamber, the air inlet chamber is provided with an air inlet hole, a flow guide part is placed above the air inlet hole, the flow guide part is of a porous structure, and the flow guide part corresponds to the bottom of the combustion chamber; the flow guide part is used for guiding the introduced nitrogen, so that the nitrogen introduced into the combustion chamber is uniformly discharged from the bottom, and the atmosphere in the whole combustion chamber is uniformly controlled; wherein the flow guide piece is of a porous structure, so that nitrogen can be effectively and uniformly discharged.

Description

Technical Field

[0001] The utility model discloses a lithium iron phosphate atmosphere furnace with uniform gas outlet, belonging to the field of atmosphere furnaces. Background Art

[0002] Lithium iron phosphate atmosphere furnace is a kind of equipment used for the preparation of lithium iron phosphate battery materials. Lithium iron phosphate is an important positive electrode material used in the manufacture of lithium-ion batteries. Atmosphere furnace is a kind of heat treatment equipment that controls the atmosphere environment. It can perform sintering, heat treatment and other processes of materials under specific atmosphere conditions.

[0003] In order to prevent oxygen from entering the furnace and affecting the heat treatment process of the material, nitrogen is usually introduced. By introducing nitrogen, the oxidation reaction of oxygen on the lithium iron phosphate material can be effectively reduced, oxidation damage to the material can be avoided, and the purity and performance of the material can be ensured.

[0004] However, the existing technology usually injects nitrogen into the combustion chamber only through a one-way channel, which may cause uneven distribution of nitrogen in the furnace and fail to achieve uniform control of the atmosphere in the entire combustion chamber. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a lithium iron phosphate atmosphere furnace with uniform gas outlet to solve the problem.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a lithium iron phosphate atmosphere furnace with uniform gas outlet, comprising a furnace body, an air intake structure and an air outlet channel arranged on the furnace body; wherein a combustion chamber is arranged inside the furnace body, and the combustion chamber is respectively connected with the air intake structure and the air outlet channel; the air intake structure comprises an air intake chamber arranged at the bottom of the combustion chamber, the air intake chamber has an air intake hole, a guide piece is placed above the air intake hole, the guide piece is a porous structure, and the guide piece corresponds to the bottom of the combustion chamber.

[0007] Preferably, each of the air inlet holes corresponds to an air inlet chamber.

[0008] Preferably, the guide member has recesses on both sides, and the air inlet chamber is provided with convex portions corresponding to the recesses; after the guide member is placed in the air inlet chamber, the recesses and the convex portions are snap-fitted.

[0009] Preferably, the inert gas will be connected to several gas inlet holes.

[0010] Preferably, a fence is provided at the bottom of the combustion chamber, and the fence is located between the air intake chamber and the combustion chamber.

[0011] Beneficial Effects

[0012] The utility model utilizes a flow guide to guide the nitrogen introduced, so that the nitrogen introduced into the combustion chamber is discharged evenly from the bottom, thereby realizing uniform control of the atmosphere in the entire combustion chamber; wherein the flow guide is a porous structure, which can effectively make the nitrogen discharge evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a schematic diagram of the structure of a lithium iron phosphate atmosphere furnace with uniform gas outlet according to the utility model;

[0015] Figure 2 It is a structural schematic diagram of the flow guide member of the utility model. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] See also Figure 1 , Figure 2 The utility model provides a technical solution for a lithium iron phosphate atmosphere furnace with uniform gas outlet: comprising a furnace body 1, an air intake structure and an air outlet channel 2 arranged on the furnace body 1; wherein a combustion chamber A is arranged inside the furnace body 1, and the combustion chamber A is connected to the air intake structure and the air outlet channel 2 respectively.

[0018] Preferably, the furnace body 1 is made of refractory bricks and is provided with an inlet and outlet channel C connected to the combustion chamber A. A furnace door 11 is provided at the port of the inlet and outlet channel C to remove the lithium iron phosphate material sintered in the combustion chamber A after the furnace door 11 is opened.

[0019] In one embodiment, the gas outlet channel 2 is arranged in the upper half of the combustion chamber A to discharge the waste gas generated during sintering.

[0020] The air intake structure includes an air intake chamber B disposed at the bottom of the combustion chamber A, and the air intake chamber B has an air intake hole 3. In one embodiment, nitrogen is connected to a plurality of air intake holes 3 as an inert gas. Preferably, each of the air intake holes 3 corresponds to an air intake chamber B, so that the nitrogen flowing out of each air intake hole 3 can enter the independent air intake chamber B separately.

[0021] In order to ensure that the nitrogen gas enters the combustion chamber A uniformly, a guide member 4 is placed above the air inlet 3, and the guide member 4 is a porous structure. In addition, the porous guide member 4 can also effectively make the nitrogen gas uniformly discharged.

[0022] In order to prevent the guide member 4 from shaking in the air intake chamber B and affecting the discharge of nitrogen, the guide member 4 has recesses 41 on both sides, and the air intake chamber is provided with convex portions 12 corresponding to the recesses 41; after the guide member 4 is placed in the air intake chamber B, the recess 41 and the convex portion 12 form a snap connection; the convex portion 12 of the air intake chamber B is used to limit the recess 41, thereby preventing the guide member 4 from shaking due to the blowing of nitrogen after being placed.

[0023] In order to prevent the medium in the combustion chamber A from clogging the guide member 4, a fence 5 is provided at the bottom of the combustion chamber A, and the fence 5 is located between the air intake chamber B and the combustion chamber A.

[0024] The guide member 4 mentioned in this patent is made of materials such as metal, refractory bricks, or other high-temperature refractory porous materials to be suitable for applications in high temperature environments (800°C), wherein the porous structure of the guide member 4 can be the microstructure of the material itself, or a perforated structure formed by post-processing; the preferred pore size is 1 micron to 1000 microns.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A lithium iron phosphate atmosphere furnace with uniform gas outlet, comprising a furnace body, an air inlet structure and an air outlet channel arranged on the furnace body; wherein a combustion chamber is arranged inside the furnace body, and the combustion chamber is communicated with the air inlet structure and the air outlet channel respectively; characterized in that: The air intake structure includes an air intake chamber arranged at the bottom of the combustion chamber, the air intake chamber has an air intake hole, a guide member is placed above the air intake hole, the guide member is a porous structure, and the guide member corresponds to the bottom of the combustion chamber.

2. The lithium iron phosphate atmosphere furnace with uniform gas outlet according to claim 1, characterized in that: Each of the air inlet holes corresponds to an air inlet chamber.

3. The lithium iron phosphate atmosphere furnace with uniform gas outlet according to claim 1, characterized in that: The guide member has recesses on both sides, and the air inlet chamber is provided with convex portions corresponding to the recesses; after the guide member is placed in the air inlet chamber, the recesses and the convex portions are snap-fitted.

4. The lithium iron phosphate atmosphere furnace with uniform gas outlet according to claim 1, characterized in that: Inert gas will be connected to several inlet holes.

5. The lithium iron phosphate atmosphere furnace with uniform gas outlet according to claim 1, characterized in that: A fence is arranged at the bottom of the combustion chamber, and the fence is located between the air intake chamber and the combustion chamber.

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