Patent ID: 11918950
Assignee: NANJING TECH UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B

Claim 0:
1. A deep-condensation Volatile Organic Compounds (VOCs) recovery system using air as refrigerant, comprising a gaseous air purification system, an air liquefaction system, and a VOCs recovery cold box,
wherein the gaseous air purification system comprises an air filter, a cold dryer and an air purifier, and the air liquefaction system comprises an air compressor, an air storage tank, a turbo-expander and an air precooler, an outlet of the air filter being connected with an inlet of the air compressor, an outlet of the air compressor being connected with an inlet of the air storage tank,
wherein the VOCs recovery cold box comprises a VOCs precooler, a VOCs condenser, a gas-liquid separator, the air precooler, and the turbo-expander, and the interlayer of a shell of the VOCs recovery cold box is filled with a powder and vacuumized to achieve the purpose of heat insulation,
wherein a liquefied air serves as a cooling medium to condense VOCs in a VOCs gas, and during operation, air passes through the air filter to remove microparticles and impurities contained in the air, and
the filtered air is compressed by the air compressor and enters the air storage tank for storage.