Device for the separation of methane from a gas mixture containing methane, carbon dioxide and hydrogen sulphide

摘要

Device for the separation of methane from a gas mixture containing methane, carbon dioxide and hydrogen sulphide;Comprehensive gas compressor (1);a feed -in line (2) to feed the gas mixture into the gas compressor (1); a first membrane run -off stage (3) downstream of the gas compressor (1),comprising a gas chamber with higher carbon dioxide permeability than methane and providing a first retardate (4) and a first permeat (5);a second membrane runner (6),which is connected to the first membrane run stage (3) for recording the first delay date (4) as an operating current,where the second membrane run -off stage (6) includes a gas run membrane with higher permeability for carbon dioxide than for methane and a second delay rate (7) as product gas,which is enriched with methane and provides a second permeat (8);optionally a third membrane race (9),which is connected to the first membrane run stage (3) to receive the first permate (5) as an operating current,where the third membrane run -off stage (9) includes a gas run membrane with higher carbon dioxide permeability than for methane and provides a third delay rate (10) and a third permeat (11);a feedback line (12) connected to a feedback point (13) at the feedback line (2) upstream of the gas compressor (1);where the feedback line (12) is connected to the second membrane run stage (6) for recording the second permeate (8), or where the optional third membrane run stage (9) is available,with the third stage of the membrane race (9) to start the third stage of retention (10) or with both the second stage of the membrane race (6) and the third stage of the membrane race (9) to start the second stageen Permeats (8) and third Retentat (10) are connected, and at least one hydrogen sulphide adsorber (14),comprising an activated charcoal bed with catalytic activity for the oxidation of hydrogen sulphide with oxygen,where the hydrogen sulphide adsorber (14) is positioned between the feedback point (13) and the first membrane race stage (3).