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延安石油化工厂20万t/a聚丙烯装置出现反应弱的异常情况,分析排查了催化剂、氢源、丙烯尾气回收系统、失活系统及丙烯原料等影响因素,并将丙烯原料送至专业分析机构及催化剂公司进行有针对性地分析及小试实验,最终确定原因是丙烯原料中水和CO含量偏高.通过加强脱水塔分子筛再生、调整脱乙烷塔及汽提塔操作等措施后,丙烯原料中水和CO含量均达到指标要求,聚合反应逐步好转,装置恢复正常.“,”There is a serious abnormal phenomena (weak reaction) in 200 kt/a polypropylene unit of Yan' an petrochemical plant.The influencing factors,including catalyst,hydrogen source,propylene tail gas recovery system,deactivation system,propylene feedstock,and so on,are analyzed.It is confirmed that relatively higher content of water and CO in propylene feedstock is attributed to the weak reaction phenomena.By strengthening the regeneration of molecular sieve and adjusting the operation of dethanizing column and stripping column,the contents of water and CO in propylene feedstock all can reach the requirements of index.The polymerization reaction is gradually improved and the device is returned to normal conditions.