INTEGRATED METHOD AND INSTALLATION FOR AIR SEPARATION BY CRYOGENIC DISTILLATION AND GAS COOLING Russian patent published in 2021 - IPC F25J3/04 

FIELD: chemistry.

SUBSTANCE: invention relates to gas separation. The integrated unit comprises an air separation unit (ASU) by cryogenic distillation, a pipeline (17) for the extraction of nitrogen-rich gas, and a pipeline (1) for the extraction of oxygen-rich gas from the air separation unit. The pipeline (1) is connected to a liquid producing unit (MEOH). The installation also contains the first column (19) for mass transfer and heat transfer. The bottom of the first column is connected to a pipeline (17). The top of the first column is connected to means (25) for water supply and a pipeline for withdrawing chilled water (21) from the first column. The liquid production unit contains a liquid product (5) storage unit (7). The unit contains a reheating gas pipeline for the extraction of gas generated as a result of reheating the liquid product from the storage tank. The pipeline (21) allows the chilled water to be supplied to the heat exchanger (23) connected to the reheating gas pipeline. The heat exchanger is connected to the storage unit to supply the chilled reheating gas into it.

EFFECT: reduced electricity consumption.

10 cl, 2 dwg