System and method for extracting high-purity essence from thin tomato liquid

The invention discloses a system and a method for extracting high-purity essence from thin tomato liquid. The system comprises an adjusting tank, a filtering system, a pervaporation membrane separation system, a finished product tank and an essence membrane concentration system. The liquid inlet side of the adjusting tank is connected to the raw material and is used for adjusting the acid-base and salinity of the tomato thin liquid; the liquid inlet side of the filtering system is connected to the adjusting tank, and the thin tomato liquid is filtered and clarified; the pervaporation membrane separation system is connected to the liquid outlet side of the filtering system and is used for enriching effective substances in the thin tomato liquid; the finished product tank is connected to the permeation side of the pervaporation membrane separation system and is used for collecting the high-purity tomato essence; the essence membrane concentration system is used for treating the retentate of the pervaporation me