NMP recovery system and lithium battery coating system

Abstract

The invention discloses an NMP recovery system and a lithium battery coating system. The NMP recovery system comprises a coating machine drying oven, an NMP adsorption system and a plurality of cyclicrecovery systems, wherein the coating machine drying oven comprises a plurality of exhaust fans and a plurality of return fans, each cyclic recovery system comprises a heat exchanger and a condensation recovery device, an exhaust outlet is connected with a high-temperature medium inlet of the heat exchanger through an exhaust pipe, and a high-temperature medium outlet of the heat exchanger is connected with a first inlet of the condensation recovery device through a condensation pipe. An air inlet of the NMP adsorption system is connected with a first outlet of each condensation recovery device through an NMP air pipe; a second outlet of the condensation recovery device is connected with a low-temperature medium inlet of the heat exchanger through a first air return pipe, and a low-temperature medium outlet of the heat exchanger is connected with the air return opening through a second air return pipe. According to the technical scheme, controllable adjustment can be achieved so as tomeet the recovery requirements of various circulating air volumes (especially the ultra-large circulating air volume), and heat losses can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of lithium battery manufacturing, in particular to an NMP recycling system and a lithium battery coating system. Background technique [0002] In recent years, with the vigorous promotion of new energy policies, the lithium battery industry has shown a blowout growth, and as a key equipment in the lithium battery manufacturing industry, the demand for lithium battery coating machines is also going hand in hand. The lithium battery coating machine is mainly composed of a coating part and an oven part. The oven part consumes a lot of heat energy due to heating the air; Spread it on the electrode substrate (copper foil or aluminum foil), and then heat the ambient temperature air to 120°C by the heater in the oven part, so that the hot air dries the slurry solvent NMP coated on the electrode substrate, and the remaining The solid organic polymer forms a strong and highly insulating layer on the electrode substr...

AI Technical Summary

Problems solved by technology

However, the existing NMP recovery system usually can only achieve a fixed circulating air volume (for example, the existing NMP recovery system is limited in volume due to factors such as transportation, so it can only achieve a maximum circulating air volume of 150,000 during work), In addition, the volume of the air duct in the NMP recovery system also needs to be set very large, resulting in a large heat loss

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