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ETHANE RECOVERY METHODS AND CONFIGURATIONS FOR HIGH CARBON DIOXIDE CONTENT FEED GASES
ETHANE RECOVERY METHODS AND CONFIGURATIONS FOR HIGH CARBON DIOXIDE CONTENT FEED GASES
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机译:高二氧化碳含量进料气的乙烷回收方法和构造
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摘要
Ethane is separated from a carbon dioxide-containing feed gas in a demethanizer that receives a rich subcooled reflux stream at very low temperature. Freezing of carbon dioxide is prevented by feeding a temperature-controlled vapor portion of the feed gas to the column, wherein the temperature of the vapor portion is adjusted by routing a portion of the expander discharge through a heat exchanger in response to the tray temperature in the demethanizer. Thus, high separation efficiency is achieved at reduced, or even eliminated carbon dioxide freezing.
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