Coating machine drying oven and coating machine waste gas recovery system

Abstract

The invention provides a coating machine oven and a coating machine waste gas recovery system.The coating machine oven comprises a first oven body and a second oven body, a drying area for drying a target product is defined in the first oven body, an air supply recovery device is assembled in the second oven body, a drying air inlet and a waste gas outlet are formed in the first oven body, and the drying air inlet is communicated with the waste gas outlet. The air supply recovery device comprises an air supply recovery air inlet and an air supply recovery air outlet, the waste gas outlet is communicated with the air supply recovery air inlet, and the drying air inlet is communicated with the air supply recovery air outlet. The coating machine drying oven has the drying function and the organic gas recycling function at the same time, no air pipe is achieved, on one hand, the construction period of air pipe construction can be shortened, the equipment cost can be reduced, on the other hand, necessary circulating air volume can be accurately controlled through each section of drying oven, and the drying efficiency is improved. And the problem of energy waste caused by overlarge circulating air volume is reduced, the adjustment time required for starting the equipment is shortened, the invalid running time of the equipment is shortened, and the production efficiency of the coating machine drying oven is improved.

Description

technical field [0001] The present application relates to the technical field of organic gas recovery, and in particular, to a coating machine oven and a coating machine waste gas recovery system. Background technique [0002] In the lithium battery production process, coating is a very important step. The main equipment used in this step is the coating machine, and the oven, as the most important part of the coating machine, includes multiple oven units. Connected and integrated, the coated substrate advances in the same direction in the oven, and is continuously baked and dried at high temperature in each oven unit during the advancing process, while the lithium battery pole piece is in the process of coating and drying , it will be accompanied by the generation of high temperature N-methylpyrrolidone (NMP) waste gas. NMP has problems such as high cost, endangering human health, and affecting production safety. If it is directly discharged, it will not only pollute the en...

AI Technical Summary

Problems solved by technology

[0004] 1. The concentration of NMP in each oven cannot be precisely controlled;

[0005] 2. In order to meet the requirements of the maximum allowable concentration in the oven, there is a problem of excessive exhaust and supply air volume, resulting in energy waste;

[0006] 3. Centralized treatment of all ovens, there is a problem of wind resistance loss caused by excessive air ducts and long air supply distances;

[0007] 4. The air volume adjustment of each section of the oven is complicated and time-consuming when starting production / replacing products

[0008] In view of the problems existing in the above-mentioned recovery methods, although it is currently proposed to use an NMP recovery device corresponding to each oven or every two ovens, such as figure 2 As shown, although this setting can solve some of the above problems, each NMP recovery device still needs to be connected to the oven through the return air and supply air pipelines

This brings about the need for on-site construction of the air duct, resulting in increased construction time and increased construction costs. Although the distance of the air duct is shortened, the air volume is reduced, and the resistance of the air supply and return air will be greatly reduced, there are still problems. Wind, air supply wind resistance loss and other issues

Images