PLANTS FOR RECOVERY OF HYDROGEN AND ARGON FROM THE PURGE GAS OF AMMONIA SYNTHESIS

Abstract

At tonnage ammonia synthesis are formed the significant volumes of purge gas which contains such valuable components as hydrogen and argon. The allocation of hydrogen from purge gas for returning it in reactor of ammonia synthesis can be made in membrane or cryogenic plants. The comparison of these plants given in the present article allows to seriously choose the concrete technology of hydrogen’s recuperation. When it is necessary from purge gas to take except hydrogen also argon, the choice of a way should be identically made for the profit of cryogenic technology. In the article is described the technological scheme of cryogenic plant for recuperation of hydrogen and argon from the purge gases. The basic ways of decrease of power expenses on recuperation argon and hydrogen from purge gases of ammonia synthesis are stated. The examples of plants are resulted in which effectively realize the cryogenic technologies of recuperative of hydrogen and also hydrogen and argon by experts of «Linde AG». The energy intensity can make 1,3-2,0 kW•h/m3 of liquid production argon.