聚酯装置终缩聚真空系统堵塞的原因及处理措施  

Causes and solutions of blockage in vacuum system of polyester final polycondensation unit

作　　者：陈蕾 邱中南 王春燕 钱国华 徐剑锋 CHEN Lei;QIU Zhongnan;WANG Chunyan;QIAN Guohua;XU Jianfeng(Tongkun Group Co.,Ltd.,Tongxiang 314500;Tongkun Group Zhejiang Hengtong Chemical Fiber Co.,Ltd.,Tongxiang 314500;:Zhejiang Tongkun Hengtong New Fiber Research Institute,Tongxiang 314500)

机构地区：[1]桐昆集团股份有限公司,浙江桐乡314500 [2]桐昆集团浙江恒通化纤有限公司,浙江桐乡314500 [3]浙江省桐昆恒通新纤维研究院,浙江桐乡314500

出　　处：《合成纤维工业》2021年第6期81-83,88,共4页China Synthetic Fiber Industry

摘　　要：结合400 kt/a聚酯装置实际生产情况,分析了聚酯装置终缩聚真空系统出现堵塞的原因,并提出处理措施。结果表明:终缩聚真空系统堵塞主要原因为气相管线堵塞和大气腿堵塞,低聚物吸附在气相管线管壁上会造成气相管线堵塞,酯化率过低、真空度过高和终缩聚反应器内的温度过高会造成大气腿堵塞;通过采取优化聚酯工艺平台和定期使用回用乙二醇热冲洗、氮气反吹、捅残渣、刮刀正反转等手段,终缩聚真空系统堵塞风险减少,保证了真空系统的稳定运行。The causes and solutions of the blockage in the vacuum system of polyester final polycondensation unit were analyzed based on the actual production situation of 400 kt/a polyester plant.The results showed that the blockage in the vacuum system of polyester final polycondensation unit was mainly caused by gas phase pipeline and atmospheric leg blockage,the oligomer adsorption on gas phase pipeline led to the gas phase pipeline blockage,and the atmospheric leg blockage occurred due to the and extremely low esterification rate and extremely high vacuum degree and final polycondensation reactor temperature;the blockage of the final polycondensation vacuum system can be prevented by optimizing polyester process platform and irregularly reusing EG hot stamping,applying nitrogen recoiling,poking residue and using scraper forward and reversely to ensure the stable operation of vacuum system.

关 键 词：终缩聚 真空系统 堵塞 气相管线 大气腿 

分 类 号：TQ342[化学工程—化纤工业]