公开(公告)号：US06945075B2

公开(公告)日：2005-09-20

申请号：US10278610

申请日：2002-10-23

Applicant: John D. Wilkinson ,  Hank M. Hudson ,  Kyle T. Ceullar

Inventor： John D. Wilkinson ,  Hank M. Hudson ,  Kyle T. Ceullar

IPC: F25J1/02 ,  F25J3/02 ,  F25J3/00 ,  F25J1/00

CPC classification number: F25J1/0022 ,  F25J1/0035 ,  F25J1/0042 ,  F25J1/0045 ,  F25J1/0052 ,  F25J1/0057 ,  F25J1/0216 ,  F25J1/0239 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0238 ,  F25J3/0242 ,  F25J2200/02 ,  F25J2200/74 ,  F25J2200/80 ,  F25J2205/04 ,  F25J2230/60 ,  F25J2240/02 ,  F25J2240/30 ,  F25J2270/02 ,  F25J2270/12 ,  F25J2270/60 ,  F25J2270/66

Abstract: A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressure, and supplied to a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

Abstract translation: 公开了一种液化天然气与生产主要包含比甲烷重的烃的液体流的方法。 在此过程中，待液化的天然气流部分冷却，膨胀至中压，并供给蒸馏塔。 来自该蒸馏塔的底部产物优先含有大于甲烷重量的任何烃类，否则会降低液化天然气的纯度。 将来自蒸馏塔的残余气流压缩至更高的中间压力，在压力下冷却以冷凝，然后膨胀至低压以形成液化的天然气流。