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Multistage membrane separation and purification process and apparatus for separating high purity methane gas
Multistage membrane separation and purification process and apparatus for separating high purity methane gas
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机译:分离高纯甲烷气的多级膜分离纯化工艺及装置
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摘要
The present invention provides a method for separating high purity methane gas from biogas, which comprises the steps of: compressing and cooling biogas (step 1); and separating carbon dioxide by introducing the biogas compressed and cooled in step 1 into a four-stage polymer separation membrane system in which the residue stream of the first polymer separation membrane is connected to the second polymer separation membrane, the residue stream of the second polymer separation membrane is connected to the third polymer separation membrane, and the permeate stream of the second polymer separation membrane is connected to the fourth polymer separation membrane (step 2).
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