无动力氨回收技术简介

Brief Introduction to Technology for Powerless Recovery of Ammonia

利用合成氨尾气本身的压力膨胀制冷,膨胀后的低压、低温气体在高效换热器中返流,冷却正流进入系统的合成氨尾气,随着尾气温度的降低,其中的氨变为液体并与其它组分分离。该系统除了仪表控制用电外, 无需额外动力输入。该技术不仅可用于回收合成氨生产中合成放空气、液氨贮罐气中的氨,也可用于回收合成氨系统弛放气中的Ar及净化进入氨合成塔的原料气。

The pressure of the ammonia tail gas is utilized to refi＇igerate through expansion, the low-pressure, low-temperature gas after expansion is returned to the high-efficiency heat exchanger, the cooled ammonia tail gas flows forward into the system, and with the decrease in the tail gas temperature, the ammonia contained changes to liquid and is separated from other constituents. The system uses electric power for instrument control, but no other additional power input is necessary. This technology is used in the recovery of vent gas from synthesis in ammonia production and ammonia from the gas in the liquid ammonia storage tanks, but may also be used to recover argon in the purge gas from the ammonia system and purify the feed gas into the ammonia convener,