发明名称 |
METHOD AND APPARATUS FOR REMOVING NITROGEN FROM A CRYOGENIC HYDROCARBON COMPOSITION |
摘要 |
Nitrogen is removed from a cryogenic hydrocarbon composition. A least a first portion of the cryogenic hydrocarbon composition is fed to a nitrogen stripper column as a first nitrogen stripper feed stream. A nitrogen-stripped liquid is drawn from the nitrogen stripper column. A liquid hydrocarbon product stream and a process vapour are produced comprising at least a step of depressurizing the nitrogen-stripped liquid to a flash pressure. The process vapour is compressed, and selectively split into a stripping portion and a non-stripping portion. A stripping vapour stream comprising at least the stripping portion is passed into the nitrogen stripper column. A vapour fraction is discharged as off gas, comprising a discharge fraction of overhead vapour from the nitrogen stripper column and comprising at least the bypass portion from the non-stripping portion of the compressed vapour, which bypasses a stripping section positioned in the nitrogen stripper column. |
申请公布号 |
WO2013087569(A3) |
申请公布日期 |
2014.05.01 |
申请号 |
WO2012EP74957 |
申请日期 |
2012.12.10 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.;SHELL OIL COMPANY |
发明人 |
SANTOS, ALEXANDRE, M., C., R. |
分类号 |
F25J3/02;F25J1/00;F25J1/02 |
主分类号 |
F25J3/02 |
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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