发明名称 |
IMPROVED CASCADE REFRIGERATION PROCESS FOR LIQUEFACTION OF NATURAL GAS |
摘要 |
This invention relates to a process for liquefying a pressurized gas stream (10) rich in methane with a heat exchanger being cooled by a cascade refrigeration system to produce a methane-rich liquid product (20) having a temperature above about -112 .degree.C (-170 .degree.F). In this process, a pressurized gas stream (10) is introduced into heat exchange contact with a first refrigerant cycle (32) comprising at least one refrigeration stage (30-31) whereby the gas stream is cooled again st a first portion of a first refrigerant to produce a cooled gas stream. The cooled gas stream is then introduced into heat exchange contact with a second refrigerant cycle (33) comprising at least one refrigeration stage (37-39) whereby the temperature of the cooled gas stream is cooled to produce a liquefied methane-rich stream (20) having a temperature above about -112 .degree.C (-170 .degree.F) and a pressure sufficient for the liquefied stream to be at or below its bubble point. |
申请公布号 |
CA2292710(C) |
申请公布日期 |
2008.11.18 |
申请号 |
CA19982292710 |
申请日期 |
1998.06.18 |
申请人 |
EXXON PRODUCTION RESEARCH COMPANY |
发明人 |
COLE, ERIC T.;BOWEN, RONALD R. |
分类号 |
F25J3/06;B23K9/173;B23K35/30;B60K15/03;C22C38/00;C22C38/04;C22C38/06;C22C38/08;C22C38/12;C22C38/14;C22C38/16;F17C1/00;F17C1/14;F17C3/00;F17C3/02;F17C7/00;F17C7/02;F17C13/00;F17D1/08;F25J1/02;F25J5/00 |
主分类号 |
F25J3/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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