Ammonia Plant

摘要

A synthesis plant ( 309 A) includes a compression device ( 360 A) that increases a pressure differential between the bottom product pressure of a cryogenic separator ( 340 A) and the delivery pressure of the bottom product to a downstream plant component. Such increased pressure differential is employed to increase cooling in the separator ( 340 A) to thereby significantly reduce the volume of excess air. In most preferred aspects, at least part of the energy required for the compression device is provided by expansion ( 320 A) of the separator feed.