Low-temperature distillation and liquefying separation recovery system and method for coal bed gas high in nitrogen content, oxygen content and hydrogen content
A low-temperature rectification, liquefaction separation technology, applied in liquefaction, cold treatment separation, refrigeration and liquefaction, etc., can solve the problems of reduced separation and liquefaction device processing capacity, no disclosure of liquefaction process, low refrigeration efficiency, etc., to achieve strong operability and process adaptability, high level of process automation control, and the effect of improving liquefaction rate
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] Such as figure 1 As shown, the present invention provides a low-temperature rectification liquefaction separation and recovery system for coalbed methane containing high nitrogen and oxygen hydrogen, which includes cold box E1, rectification tower T2, denitrification, hydrogen, oxygen system, refrigerant circulation system, vent Gas treatment system and flash gas utilization system; Among them, the refrigerant circulation system provides cooling capacity for the cold box E1 and the rectification tower T2.
[0018] The denitrification, hydrogen, and oxygen systems include feed gas pipelines, rectification tower T2, heavy hydrocarbon separation tank V1, condenser E2, reboiler E8, and valves 1 to 5; among them, condenser E2 is set in the rectification tower T2 tower At the top, the reboiler E8 is set at the bottom of the rectification column T2. ...
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