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公开(公告)号:US09335091B2
公开(公告)日:2016-05-10
申请号:US13951021
申请日:2013-07-25
发明人: Wesley Roy Qualls , Qi Ma , Megan Victoria Evans , Karl Lee Herzog , Jame Yao , Mohan Chahal , Matt Calvin Gentry , Attilio Jose Praderio , Marc Thomas Bellomy , Satish Gandhi , Mike Wilkes , Will James
CPC分类号: F25J1/0022 , F25J1/004 , F25J1/0045 , F25J1/0052 , F25J1/0082 , F25J1/0085 , F25J1/0087 , F25J1/0209 , F25J1/021 , F25J1/0217 , F25J1/0238 , F25J1/0245 , F25J3/0209 , F25J3/0233 , F25J3/0257 , F25J2200/08 , F25J2200/40 , F25J2200/70 , F25J2200/76 , F25J2215/60 , F25J2220/64 , F25J2245/42 , F25J2270/02 , F25J2270/42
摘要: Methods and systems for removing nitrogen during liquefaction of natural are provided. Methods of removing nitrogen include warming a predominantly methane stream in a methane cold box to provide a warmed predominantly methane stream; conducting at least a portion of the warmed predominantly methane stream from the methane cold box to a nitrogen removal unit comprising at least a first nitrogen removal column and a last nitrogen removal column, wherein the first nitrogen removal column is located upstream of the last nitrogen removal column; passing the warmed predominantly methane stream through the last nitrogen removal column to provide a refluxed warmed predominantly methane stream; and routing at least a portion of the refluxed warmed predominantly methane stream to the last nitrogen removal column.
摘要翻译: 提供了在天然液化过程中除氮的方法和系统。 去除氮的方法包括在甲烷冷箱中主要加热甲烷流,以提供主要为暖气的甲烷流; 将来自甲烷冷箱的至少一部分加热的主要甲烷物流引导至至少包括第一除氮塔和最后一个除氮塔的除氮单元,其中第一除氮塔位于最后一个氮气去除的上游 柱; 将主要温热的甲烷流通过最后一个除氮塔,以提供回流温热的主要甲烷物流; 并将至少一部分回流加热的主要甲烷物流路由至最后一个除氮塔。