合成氨回路中降低惰性气体含量的措施  

Countermeasures of reducing inert gas content in synthetic ammonia loop

作　　者：鲁玉莹[1] 李庆勋[1] 刘晓彤[1] 王林[1] 刘克峰[1] 孔繁华[1] 

机构地区：[1]中国石油天然气股份有限公司石油化工研究院,北京102206

出　　处：《现代化工》2016年第8期166-169,共4页Modern Chemical Industry

基　　金：国家重点研发计划(2016YFB0600900)

摘　　要：分析了现有合成氨回路惰性气体浓度增加的可能原因,介绍了深冷分离、变压吸附、膜分离法3种合成氨弛放气回收氢降低惰性组分含量的技术,并进行了对比分析。对于大型合成氨厂,可以在氨合成之前采用深冷净化装置或变压吸附装置净化原料气,以降低原料气中惰性组分的含量;对于小型合成氨厂,可以考虑从驰放气提氢方面入手。The possible reasons for the increased inert gas content in the existing ammonia synthesis loop are analyzed. Three kinds of methods for reduction of inert gas conetent and recovery of hydrogen,including cryogenic separation,pressure swing adsorption（ PSA） and membrane separation technology,are introduced and compared. For a large-scale synthetic ammonia plant,feed gas could be purified before ammonia synthesis by using cryogenic separation or PSA to decrease the concentration of inert gas. For a small-scale synthetic ammonia plant,recovering hydrogen from purge gas might be a breakthrough point.

关 键 词：合成氨 惰性气体 氢回收 

分 类 号：TQ072[化学工程]