许多石化企业在生产过程中都产生大量甲烷、乙烷、氮气、氢气等易爆可燃气体,为确保生产设备安全,均将这些可燃气体引入火炬塔点燃排放,浪费大量能源,还对环境造成烟尘污染和热污染。而某些工艺过程中又要消耗大量民用液化气加热。一些发达国家采用往复式压缩机配巨大储气柜回收火炬气,但投资昂贵,运行也不十分可靠,未能根本解决问题。七一一研究所于1986年主攻这一难题,首选上海石化总厂乙烯厂,经综合评估,提出了中国独特的湿式螺杆压缩机火炬气回 Many petrochemical enterprises produce large quantities of explosive flammable gases such as methane, ethane, nitrogen, and hydrogen in the production process. To ensure the safety of production equipment, these flammable gases are introduced into the torch tower to ignite and discharge, which wastes a lot of energy and causes smoke and dust to the environment. Pollution and heat pollution. In some processes, a large amount of civilian LPG heating is used. Some developed countries have used reciprocating compressors and huge gas storage tanks to recover the flare gas. However, the investment is expensive and the operation is not very reliable. It has not solved the problem fundamentally. In 1986, the 711 Institute focused on this problem and preferred the Shanghai Petrochemical Plant ethylene plant. After a comprehensive assessment, it proposed the unique Chinese wet screw compressor flare gas back.