| 摘要 |
Apparatus for separating natural gas liquids is disclosed, the apparatus comprises a heat exchanger to provide the heating and cooling necessary for separation of natural gas liquids from a feed stream by heat exchange contact between the feed gas stream and one or more process streams. There is a distillation column operable to receive the feed gas stream and separate the feed gas stream into a column overhead stream comprising a substantial amount of the lighter hydrocarbon components of the feed gas stream and a column bottoms stream, comprising a substantial amount of the heavier hydrocarbons. A first separator is operable to receive the distillation column overhead stream and separate the column overhead stream into an overhead sales gas stream enriched in nitrogen and a nitrogen-depleted bottoms stream comprising a mixed refrigerant for providing process cooling in the heat exchanger and a side draw stream of intermediate nitrogen content. A compressor is operable to compress the mixed refrigerant stream after the mixed refrigerant stream has provided process cooling in the heat exchanger and a second separator is operable to receive the compressed mixed refrigerant stream and separate it into an overhead stream and a bottoms stream that is fed to the distillation column as a reflux stream. |
