发明申请
- 专利标题: Internal refrigeration for enhanced NGL recovery
- 专利标题(中): 内部制冷用于增强NGL恢复
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申请号: US11032464申请日: 2005-01-10
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公开(公告)号: US20060150672A1公开(公告)日: 2006-07-13
- 发明人: Rong-Jywn Lee , Ying Zhang , Jame Yao , Jong Juh Chen , Douglas Elliot
- 申请人: Rong-Jywn Lee , Ying Zhang , Jame Yao , Jong Juh Chen , Douglas Elliot
- 申请人地址: US TX Houston
- 专利权人: IPSI L.L.C.
- 当前专利权人: IPSI L.L.C.
- 当前专利权人地址: US TX Houston
- 主分类号: F25J3/00
- IPC分类号: F25J3/00
摘要:
The present invention is directed to methods for improving the efficiency of processes for the recovery of natural gas liquids from a gas feed, e.g., raw natural gas or a refinery or petrochemical plant gas stream. These methods may be employed with most, if not all, conventional separation methods using distillation towers, e.g., a demethanizer and/or deethanizer column. The methods of the present invention involve installing an internal refrigeration system consisting of an open cycle refrigerant withdrawn from a distillation column and a closed cycle refrigerant derived from the open cycle refrigeration system. A separator is installed downstream of the recycle compressor discharge cooler in the open cycle refrigeration scheme. At least a portion of liquid withdrawn from this separator is used as a closed cycle refrigerant by indirect heat exchange with the inlet gas or other process streams. Thus a closed refrigeration cycle enhances the performance of the open refrigeration cycle.
公开/授权文献
- US07257966B2 Internal refrigeration for enhanced NGL recovery 公开/授权日:2007-08-21