Heat pump and molecular sieve adsorption runner combined cycle organic solvent recovery device

Abstract

The invention relates to a heat pump and molecular sieve adsorption turning wheel combined cycle organic solvent recycling device. The heat pump and molecular sieve adsorption turning wheel combined cycle organic solvent recycling device comprises an internal cycle pipeline, a sub pipeline and a branch pipeline, wherein the internal cycle pipeline comprises a gas inlet, an internal cycle fan, a gas heater and a gas outlet; the gas inlet is communicated with a gas outlet of a coating machine; the gas outlet is communicated with a gas inlet of the coating machine; the sub pipeline comprises the gas outlet of the coating machine, an exhaust fan, a hot gas introducing and discharging opening of a gas-gas heat exchanger, an air cooler, an evaporator of the high-temperature heat pump, an evaporator of a low-temperature heat pump, a condenser of the low-temperature heat pump, a condenser of the high-temperature heat pump, a cold gas introducing and discharging opening of the gas-gas heat exchanger and a gas inlet; the branch pipeline comprises a branch pipeline gas inlet, an adsorption area of a molecular sieve concentration turning wheel, a processing fan and a branch pipeline gas outlet; the branch pipeline gas inlet is connected with a gas outlet of the evaporator of the low-temperature heat pump, and the branch pipeline gas outlet is communicated with a machine head and a machine tail of the coating machine. According to the device, a heat pump is used for recycling an organic solvent, and meanwhile the gas temperature is increased, so that energy sources are saved; meanwhile, zero emission under the condition of saving the coating energy sources is realized.

Description

technical field [0001] The invention relates to a device for recovering an organic solvent from exhaust gas in a coating process, in particular to a combined cycle organic solvent recovery device for a heat pump and a molecular sieve adsorption runner. Background technique [0002] Coating one material onto another substrate by coating is a common process operation. The manufacturing process of lithium battery positive electrode sheet is to make the battery positive electrode material, binder electrode, conductive agent and organic solvent into slurry Finally, it is coated on aluminum foil and then dried. [0003] figure 1 Is a schematic diagram of the working principle of a typical coating operation. [0004] figure 1 After heating the solvent-containing slurry, the organic solvent in the slurry will volatilize. In order to ensure the safety of the coating process, there must be a process of discharging gas containing organic solvents during the coating operation. figur...

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Problems solved by technology

[0009] Finally, the gas discharged from point a contains a certain amount of organic solvents. If it is discharged directly, it will cause waste of resources and pollute the environment.

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