合成氨装置氮氢气压缩机级间气体余热利用研究  

Study of Waste Heat Utilization of Nitrogen Hydrogen Compressor Interstage Gas of Synthetic Ammonia Plant

作　　者：马凤兰 孟祥睿[2,3] 刘宏[2,3] 毛文睿 魏新利[2,3] 

机构地区：[1]郑州市安全生产教育中心,河南郑州450006 [2]热能系统节能技术与装备教育部工程研究中心,河南郑州450001 [3]郑州大学化工与能源学院,河南郑州450001

出　　处：《化肥工业》2016年第4期33-39,共7页Chemical Fertilizer Industry

摘　　要：针对合成氨生产系统,提出了回收氮氢气压缩机级间气体余热的工艺技术新方案。该方案以回收的氮氢气压缩机级间气体余热来驱动溴化锂吸收式制冷机制取冷水,再用冷水冷却压缩机一入气体,达到降低压缩工段能耗、提高生产效率的目的。通过对240 kt/a合成氨生产装置压缩工段的研究表明:该方案可节省近2/3的循环冷却水用量;在同等耗电量的情况下,压缩机打气量将增加9 156 m^3/h(标态),折合氨产量2.1 t/h以上,吨氨电耗可降低约115 k W·h;新方案的投资回收期约为7.5个月。In connection with synthetic ammonia production system, a new process technology scheme to recover waste heat of nitrogen hydrogen compressor interstage gas is proposed. The scheme, which uses the recovered waste heat of nitrogen hydrogen compressor interstage gas to drive lithium bromide absorption refrigerator to make cooling water, then the cooling water is used to cool primary entrance gas of compressor, can achieve the aim of reducing energy consumption of compression section and improving productivity. Study results of compression section of 240 kt/a synthesis ammonia production plant indicates that this scheme can save nearly 2/3 of circulating cooling water; under same power consumption, the capacity of the compressor will increase 9 156 m^2/h （standard conditions）, converted into ammonia output it is above 2. 1 t/h, power consumption per ton of ammonia can decrease about 115 kW· h; investment recovery period of the new scheme is approximately 7.5 months.

关 键 词：余热利用 氮氢气压缩机 级间气体 溴化锂吸收式制冷 经济性分析 

分 类 号：X706[环境科学与工程—环境工程]