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公开(公告)号:US20090277217A1
公开(公告)日:2009-11-12
申请号:US12117364
申请日:2008-05-08
IPC分类号: F25J3/00
CPC分类号: F25J3/0209 , F25J1/0022 , F25J1/004 , F25J1/0052 , F25J1/021 , F25J1/023 , F25J1/0238 , F25J1/0241 , F25J1/0265 , F25J1/0283 , F25J3/0233 , F25J3/0257 , F25J2200/02 , F25J2200/40 , F25J2200/70 , F25J2200/78 , F25J2215/04 , F25J2220/62 , F25J2220/64 , F25J2270/12 , F25J2270/88
摘要: An LNG facility employing an enhanced nitrogen removal system that concentrates the amount of nitrogen in the feed stream to a nitrogen removal unit (NRU) to thereby increase the separation efficiency of the NRU. In one embodiment, the nitrogen removal system comprises a multistage separation vessel operable to separate nitrogen from a cooled natural gas stream. At least a portion of the resulting nitrogen-containing stream exiting the multistage separation vessel can be used as a refrigerant, processed to a nitrogen removal unit, and/or utilized as fuel gas for the LNG facility.
摘要翻译: 使用增强除氮系统的LNG设备,其将进料流中的氮气量浓缩到除氮单元(NRU),从而提高NRU的分离效率。 在一个实施方案中,除氮系统包括可操作以将氮气与冷却的天然气流分离的多级分离容器。 离开多级分离容器的所得含氮物流的至少一部分可以用作制冷剂,被处理成除氮单元,和/或用作LNG设备的燃料气体。