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METHOD FOR SEPARATING A NATURAL GAS STREAM INTO A METHANE-ENRICHED FRACTION AND A FRACTION ENRICHED IN C2 AND HIGHER HYDROCARBONS
METHOD FOR SEPARATING A NATURAL GAS STREAM INTO A METHANE-ENRICHED FRACTION AND A FRACTION ENRICHED IN C2 AND HIGHER HYDROCARBONS
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机译:将天然气流分离为甲烷富集馏分和富含C2和更高碳氢化合物的馏分的方法
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摘要
A process for purifying a feed gas including methane and heavy hydrocarbons, including: step a): cooling the feed gas in a heat exchanger; step b): introducing the resulting into a first phase separator to produce a liquid stream depleted in methane and enriched in heavy hydrocarbons and a gas stream; step c): separating the gas stream in a membrane from which a methane-enriched permeate stream and a partially condensed residue stream exit; step d): introducing the residue stream from step c) into a second phase separator vessel in order to produce a liquid stream and a gas stream; step e): introducing at least one portion of the gas stream resulting from step d) into a JT expansion means; and step f): heating at least one portion of the expanded stream in the heat exchanger used in step a) counter-current to the feed stream in order to cool the latter.
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