Using special return circuit to remove nitrogen in LPG production

摘要

The invention describes a method and a device for liquefying the energy flow of natural gas and nitroglycerin to produce a low content dinitrogen product, delivering natural gas through a main heat exchanger to generate the first LNG flow, It is separated into a low content nitrogen dioxide product and a nitrogen containing steam recovery flow composed of natural gas steam. The first batch of nitrogen dioxide flow is generated through the recovery flow of the main heat exchanger,Separate from and parallel to the supply flow of natural gas to produce the first batch of rich nitrated natural gas - at least partially liquefied to provide rich nitrated steam products