公开(公告)号：EP2598815A2

公开(公告)日：2013-06-05

申请号：EP10737899.4

申请日：2010-07-28

申请人： Air Products and Chemicals, Inc.

发明人： HIGGINBOTHAM, Paul ,  TOPHAM, Anthony, Knut, James ,  TAPSFIELD, Kevin, David, Thomas ,  ROSSMAN, John, Crawford

IPC分类号： F25J1/00

CPC分类号： F25J1/0012 ,  F25J1/0005 ,  F25J1/0007 ,  F25J1/001 ,  F25J1/0015 ,  F25J1/0017 ,  F25J1/002 ,  F25J1/0022 ,  F25J1/0027 ,  F25J1/0035 ,  F25J1/0037 ,  F25J1/004 ,  F25J1/0202 ,  F25J1/0234 ,  F25J1/0254 ,  F25J1/0288 ,  F25J3/04224 ,  F25J3/04357 ,  F25J3/04393 ,  F25J2215/14 ,  F25J2215/32 ,  F25J2215/62 ,  F25J2245/90 ,  F25J2270/06 ,  F25J2290/62

摘要： A system and process for liquefying a gas, comprising introducing a feed stream into a liquefier comprising at least a warm expander and a cold expander; compressing the feed stream in the liquefier to a pressure greater than its critical pressure and cooling the compressed feed stream to a temperature below its critical temperature to form a high pressure dense-phase stream; removing the high pressure dense-phase stream from the liquefier, reducing the pressure of the high pressure dense-phase stream in an expansion device to form a resultant two-phase stream and then directly introducing the resultant two-phase stream into a storage tank; and combining a flash portion of the resultant two-phase stream with a boil-off vapor from a liquid in the storage tank to form a combined vapor stream, wherein the temperature of the high pressure dense-phase stream is lower than the temperature of a discharge stream of the cold expander.