METHOD OF MULTISTAGE GAS MIX PROCESSING TO PARAMETERS OF ITS CONSUMPTION Russian patent published in 2012 - IPC B01D53/22 B01D63/02 

FIELD: process engineering.

SUBSTANCE: invention relates to multistage cleaning of gas mix with the help of semipermeable membranes. Proposed method comprises feeding initial gas mix via pipeline into high-pressure chamber of first membrane gas-separation module. Portion of gas flow not penetrated membrane is fed from first membrane gas-separation module high-pressure chamber into second membrane gas-separation module high-pressure chamber. Another portion of not penetrated gas is directed for purging of first membrane gas-separation module low-pressure chamber. Gas flow penetrated from first membrane gas-separation module low-pressure chamber is directed for recovery. Portion of not penetrated gas in second membrane gas-separation module is fed to consuming equipment. Another portion of not penetrated gas is directed to purging of second membrane gas-separation module low-pressure chamber. Note here that portion of flow penetrated from second membrane gas-separation module low-pressure chamber outlet is fed into initial mix feed pipeline. Pressure is reduced in low-pressure chamber of every membrane gas-separation module by means of vacuum compressors. Gas flowing from said chambers is compressed.

EFFECT: higher process efficiency.

3 cl