| 摘要 |
The invention includes a process and apparatus for separating a liquefied natural gas (LNG) stream containing methane and lighter components and heavy hydrocarbon components into a more volatile gas fraction containing a substantial amount of the methane and lighter components and a less volatile fraction containing a large portion of the heavy hydrocarbon components. The process includes preheating the LNG stream prior to introduction to the fractionation tower. At least part of the tower overhead stream is cooled to substantially condense that portion. This is then pumped to high pressure to produce a high pressure lean LNG stream which is then split into two streams, one of which is cooled and used as reflux to the fractionation tower.
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