| 摘要 |
A process is disclosed for the purification of natural gas in which the reduction of the nitrogen content of a natural gas stream is achieved by a combination of absorption, purification, flashing, and reflux steps. More specifically, the process achieves the rejection of inert components such as nitrogen from natural gas without operating in the cryogenic temperature range. The process uses a lean solvent to absorb the non-rejected components in a recovery zone of an absorber and uses a portion of the off-gas from the flashing zone to purify the rich solvent in a purification zone of the absorber. In a further embodiment, solvent entrained in off-gases from low and medium pressure flash zones is recovered in a high pressure flash zone by washing the off-gases with recovered lean solvent.
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