循环气体压缩机的紧急停车，是烷基苯联合装置非计划停车中的一个比较典型的事故案例。
Emergent shutdown of the recycle gas compressor is a very typical accident of non-plan shutdown happened in alkyl benzenes combination plant.
排气过程：压缩气体移到排气口，完成一个工作循环。
Exhaust process: compressed gases to the exhaust port, to complete a working cycle.
将蒸发的乙烯馏份再循环至原料气体压缩机。
The vaporized ethylene fraction is recirculated to the raw gas compressor.
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