A METHOD TO PRODUCE LNG AT GAS PRESSURE LETDOWN STATIONS IN NATURAL GAS TRANSMISSION PIPELINE SYSTEMS

摘要

There is described a method to produce LNG at gas pressure letdown stations. Ahighpressure gas stream is pre-cooled, dewatered, and then divided into twostreams: a divertedLNG production stream (LNG stream) and a gas to end users stream (Userstream).Carbon dioxide is removed from the LNG stream and the LNG stream iscompressed. TheLNG stream is then precooled by passing through one or more heat exchangers.Hydrocarbon condensate is removed from the LNG steam by passing the LNG streamthrough a first Knock Out drum. The LNG stream is then depressured by passingthrough aJT valve to depressurize the gas vapour exiting the first Knock Out drum anddischarge itinto a second Knock Out drum where the LNG is captured.