发明申请
US20150300733A1 Nitrogen Removal with ISO-Pressure Open Refrigeration Natural Gas Liquids Recovery
有权
氮气去除与ISO压力开放制冷天然气液体回收
- 专利标题: Nitrogen Removal with ISO-Pressure Open Refrigeration Natural Gas Liquids Recovery
- 专利标题(中): 氮气去除与ISO压力开放制冷天然气液体回收
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申请号: US14751562申请日: 2015-06-26
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公开(公告)号: US20150300733A1公开(公告)日: 2015-10-22
- 发明人: Michael Malsam
- 申请人: Lummus Technology Inc.
- 专利权人: Lummus Technology Inc.
- 当前专利权人: Lummus Technology Inc.
- 主分类号: F25J1/00
- IPC分类号: F25J1/00 ; F25J3/02
摘要:
A process for recovery of natural gas liquids is disclosed, the process including: fractionating a gas stream comprising nitrogen, methane, ethane, and propane and other C3+ hydrocarbons into at least two fractions including a light fraction comprising nitrogen, methane, ethane, and propane, and a heavy fraction comprising propane and other C3+ hydrocarbons; separating the light fraction into at least two fractions including a nitrogen-enriched fraction and a nitrogen-depleted fraction in a first separator; separating the nitrogen-depleted fraction into a propane-enriched fraction and a propane-depleted fraction in a second separator; feeding at least a portion of the propane-enriched fraction to the fractionating as a reflux; recycling at least a portion of the propane-depleted fraction to the first separator. In some embodiments, the nitrogen-enriched fraction may be separated in a nitrogen removal unit to produce a nitrogen-depleted natural gas stream and a nitrogen-enriched natural gas stream.