75kg·h^(-1)聚丙烯中试装置预络合工艺管路的优化设计计算

Optimized design and calculation of 75kg·h^(-1) polypropylene pilot-plant test pre-compounding

催化剂的预络合对聚丙烯产品的颗粒形态影响很大,对工艺操作也有一定的影响,由于在中试装置上采用的预络合单元目前没有成熟的模式可参考,且实际操作难度较大,运行稳定时间仅有1~2h后就会发生堵塞,我们通过对管路连接方式、管件对阻力损失影响的计算分析及插入管线长度对装置影响的实验,对预络合工艺管路进行了重新设计,减少了工艺管路中止回阀及截止阀的数量,将催化剂预络合物与丙烯的管路连接改为并流,提升预聚丙烯的流量为40L.h-1后大大增加了预络合工艺运行的稳定性。

The pre-compounding can not only improve the polymer morphology,but also significantly influence the plant operation.In the actual pre-compounding operation,there are many difficulties,usually it run no more than two hours.By way of the optimized design and calculation the piping connections has been redesigned and the flow of pre-polypropylene has enhanced to 40L·h-1,thereby the stability of processes running has been greatly increased.