Unipol聚丙烯工艺反应器静电波动分析及处理

Analysis and Treatment of Static Fluctuation in Unipol Polypropylene Process Reactor

阐述了Unipol气相流化床聚丙烯工艺在静电波动期间分析思路及处理方法。中煤蒙大公司聚丙烯装置在国产营口向阳CS-1-G催化剂切换至进口SHAC201催化剂后反应器出现静电波动,针对反应器静电波动问题,对静电产生的原因进行分析,同时通过优化工艺操作等措施来消除静电影响,结果表明:采用催化剂直接切换法,切换后反应器形成两种不同催化剂粉料形成的混合状态,在这种混合状态下,反应器内树脂粉料与树脂粉料摩擦增加引发静电;催化剂切换方法采用衰减终止切换可有效抑制静电的持续发生,实现聚丙烯装置的安全稳定运行。

The analysis and treatment of Unipol polypropylene gas phase fluidized bed were described,when the static electricity fluctuated.After the domestic xiangyang CS-1-G catalyst was switched to imported SHAC201 catalyst,the static electricity fluctuation occurred in the polypropylene unit of China Coal Mengda.Aiming at the static electricity fluctuation of reactor,the causes of static electricity and eliminate static effects were analyzed by optimizing process operation.The results show that the mixture state formed by two different catalyst powders is formed in the reactor by direct catalyst switching method.In this mixing state,the strong friction between the resin powder and the resin powder in the reactor could cause static electricity.The catalyst switching method using attenuation termination switch can effectively suppress the static electricity and ensure the stable operation of polypropylene plant.