CN-224230655-U - Thermal cycle low temperature sintering tunnel cave

CN224230655UCN 224230655 UCN224230655 UCN 224230655UCN-224230655-U

Abstract

The utility model discloses a thermal cycle low-temperature sintering tunnel kiln which comprises a coating chamber, a drying chamber, a low-temperature sintering chamber and a cooling chamber which are sequentially arranged, wherein the coating chamber is provided with a feed inlet, a coating agent solution inlet, a stirring kettle and an inclined water filtering net, the drying chamber is provided with a conveying belt, a hot gas inlet and an exhaust gas outlet, the low-temperature sintering chamber is provided with a particle treatment mechanism, a trolley and a hot gas outlet, the cooling chamber is provided with a first nitrogen inlet, the stirring kettle is provided with a stirring paddle and a discharge hole, one end of the inclined water filtering net is positioned below the discharge hole, the other end of the inclined water filtering net is positioned above the conveying belt, the other end of the conveying belt is positioned above the particle treatment mechanism, the trolley is positioned below the particle treatment mechanism, and the hot gas inlet is communicated with the hot gas outlet through a hot gas pipe. The utility model solves the problem of complex operation of multiple procedures in the prior art, improves the production efficiency and the coating quality of the powder surface, and avoids energy waste and saves resources by recycling the heat generated by sintering the low-temperature sintering chamber.

Inventors

Qiu Dianchun
LIU BAINAN
LUO FEI
CAO CHAO

Assignees

河南天目先导电池材料有限公司

Dates

Publication Date: 20260512
Application Date: 20250417

Claims (10)

1. A thermal cycle low-temperature sintering tunnel kiln is characterized by comprising a coating chamber, a drying chamber, a low-temperature sintering chamber and a cooling chamber which are sequentially arranged, wherein the coating chamber is provided with a feed inlet, a coating agent solution inlet, a stirring kettle and an inclined water filtering net, the drying chamber is provided with a conveying belt, a hot gas inlet and an exhaust gas outlet, the low-temperature sintering chamber is provided with a particle treatment mechanism, a trolley and a hot gas outlet, the cooling chamber is provided with a first nitrogen inlet, the stirring kettle is provided with a stirring paddle and a discharge hole, one end of the inclined water filtering net is positioned below the discharge hole, the other end of the inclined water filtering net is positioned above the conveying belt, the other end of the conveying belt is positioned above the particle treatment mechanism, the trolley is positioned below the particle treatment mechanism, and the hot gas inlet is communicated with the hot gas outlet through a hot gas pipe.
2. The heat cycle low temperature sintering tunnel kiln of claim 1 wherein the side wall of the cladding chamber is provided with a second nitrogen inlet.
3. The heat cycle low temperature sintering tunnel kiln of claim 1, wherein a coating agent solution recovery tank is arranged below the inclined water filtering net.
4. The heat cycle low temperature sintering tunnel kiln of claim 3 wherein the coating agent solution recovery tank is in communication with the stirred tank via a circulation line.
5. The heat cycle low temperature sintering tunnel kiln of claim 1 wherein the particle treatment mechanism comprises a screen or two oppositely disposed press rolls.
6. The thermal cycle low temperature sintering tunnel kiln of claim 1, wherein an adsorption plate is arranged in the hot air pipe.
7. The heat cycle low temperature sintering tunnel kiln as set forth in claim 1, wherein isolation gates are provided between the cladding chamber and the drying chamber, and between the drying chamber and the low temperature sintering chamber, respectively.
8. The heat cycle low temperature sintering tunnel kiln of claim 7 wherein one end of the inclined water filter screen passes through the isolation gate and is positioned above the conveyor belt.
9. The heat cycle low temperature sintering tunnel kiln of claim 7 wherein one end of the conveyor belt passes through the isolation gate and is positioned above the particle handling mechanism.
10. The thermal cycle low temperature sintering tunnel kiln according to claim 1, wherein an isolation gate is arranged or not arranged between the low temperature sintering chamber and the cooling chamber, and when the isolation gate is arranged between the low temperature sintering chamber and the cooling chamber, a nitrogen transmission port is arranged on the inner wall of the joint of the low temperature sintering chamber and the cooling chamber.

Description

Thermal cycle low temperature sintering tunnel cave Technical Field The utility model relates to the technical field of tunnel kilns, in particular to a thermal cycle low-temperature sintering tunnel kiln. Background At present, the lithium ion battery cathode material used in large-scale commercialization mainly comprises carbon materials, including graphite and the like, but the theoretical specific capacity is low, and the requirement of a high-capacity high-power lithium ion battery cannot be met, so that a graphite powder coating method is adopted in the prior art to prepare the graphite cathode material for the high-capacity high-power lithium ion battery with the capacity density and the quick charge performance. Dispersing a low-carbon precursor in a solvent, then depositing the low-carbon precursor on the surface of graphite powder by mixing and drying, and then heating and cooling the coated powder in an inert atmosphere to finally obtain a carbon material coating structure, wherein the powder is coated step by step in the prior art, the powder and a surface coating agent solution are firstly mixed in a kettle, then poured into an oven for drying, and then the powder is sent into a tunnel kiln for sintering, and a plurality of procedures are separated, so that the coating quality of the powder surface is influenced, and the problems of mutual adhesion and uneven coating exist. Therefore, in order to solve the above problems and technical needs, it is necessary to design an integrated tunnel kiln, which can integrate suspension dispersion, drying and sintering, reduce operation steps and powder aggregation, and simultaneously can utilize sintering for preheating. Disclosure of Invention The utility model aims to provide a thermal cycle low-temperature sintering tunnel kiln which has a simple structure and strong practicability, integrates the functions of surface coating, drying, low-temperature sintering and cooling, solves the problem of complex separate operation of multiple procedures in the prior art, and improves the production efficiency and the coating quality of powder surfaces. In order to achieve the above purpose, the utility model adopts the following technical scheme: A thermal cycle low-temperature sintering tunnel kiln comprises a coating chamber, a drying chamber, a low-temperature sintering chamber and a cooling chamber which are sequentially arranged, wherein the coating chamber is provided with a feeding hole, a coating agent solution inlet, a stirring kettle and an inclined water filtering net, the drying chamber is provided with a conveying belt, a hot gas inlet and an exhaust gas outlet, the low-temperature sintering chamber is provided with a particle treatment mechanism, a trolley and a hot gas outlet, the cooling chamber is provided with a first nitrogen inlet, the stirring kettle is provided with a stirring paddle and a discharging hole, one end of the inclined water filtering net is positioned below the discharging hole, the other end of the inclined water filtering net is positioned above the conveying belt, the other end of the conveying belt is positioned above the particle treatment mechanism, the trolley is positioned below the particle treatment mechanism, and the hot gas inlet is communicated with the hot gas outlet through a hot gas pipe. In the utility model, the inclined water filtering net refers to a water filtering net which is obliquely arranged and is used for filtering the coating agent solution, and the obliquely arranged water filtering net is convenient for conveying the coated powder to a drying chamber. Powder to be sintered is sent to a stirring kettle through a feed inlet, meanwhile, a coating agent solution is conveyed through a coating agent solution inlet for powder coating, a stirring paddle is used for stirring, the powder is in favor of contact with the coating agent solution, the coating rate is improved, the coated powder is sent to a conveyor belt through an inclined water filtering net for drying, then is sent to a particle processing mechanism for powder processing through the conveyor belt, powder gathered in the coating process is screened out, and then the powder is carried by a small vehicle for sintering and cooling in sequence. The hot gas generated in the sintering process enters the drying chamber through the hot gas pipe, and the powder is dried by utilizing the residual temperature of the hot gas, so that the resources can be saved, and the thermal cycle is realized. According to the utility model, nitrogen is introduced into the cooling chamber through the first nitrogen inlet and then enters the low-temperature sintering chamber, and the cooling chamber exchanges heat with the nitrogen while cooling the sintered product, so that the nitrogen is preheated and then enters the low-temperature sintering chamber, the condition that the ambient temperature is influenced by the direct introduction of the nitrogen into the low-temper