The cracking gas compressor in the 220 kt/a ethylene plant of a company was started in September 2019 after overhaul,the third-stage outlet flow rate was maintained at around 118 t/h,and the third-stage outlet pressure reached a maximum of 1 720 kPa,which is close to the set pressure of safety valve of 1 746 kPa,resulting in limited load adjustment of cracking gas compressor and weakened ability to resist fluctuations.In response to the abnormal third-stage outlet pressure of cracking gas compressor and the deviations from design conditions,the operating process parameters and mechanical structure of the compressor were analyzed,and some measures such as setting internal control indicators for compressor outlet pressure,replacing inter-stage gas seals and adding high-pressure nitrogen sealing pipelines were taken to ensure the long-term,full-load and optimal operation of the cracking gas compressor.
关键词
裂解气压缩机/三段出口压力/内控指标/级间气封
Key words
cracking gas compressor/third-stage outlet pressure/internal control indicator/inter-stage gas seal
维普
万方数据