加氢反应器多相阻塞流新的判断方法

New judgment method for multiphase blocking flow in hydrogenation reactor

论述了PTA加氢反应器流程、反应原理和控制方法。加氢反应器发生故障即加氢反应器液位不能靠氢气流量来控制,按控制原理来说氢气流量加大,液位应该下降,但是反应器液位反而不断上涨,造成反应器满液位;反应器满液位时,反应器压力波动大,而此时加氢催化剂容易损坏或产品不合格。由此推测加氢反应器内产生阻塞流。但用化工设计手册提供流体阻塞流的判断方法去判断,结果与实际不符。经过工业试验,找到多相阻塞流新的判断和处理方法,并经过实际检验效果较好。

This paper describes the PTA hydrogenation reactor process,reaction principle,and control methods,as well as the occurrence of failure phenomena.The liquid level of the hydrogenation reactor cannot be controlled by the hydrogen flow rate.According to the principle of control,the hydrogen flow rate is increased,the liquid level should be lowered,but the liquid level of the reactor is continuously rising,causing the reactor to be full;and the reactor is full.The pressure fluctuation is large,and at this time,the hydrogenation catalyst is easily damaged or the product is unqualified.We speculate that a blocked flow is produced in the hydrogenation reactor.However,using the chemical design manual to provide a method for judging fluid blocking flow,and the results does not match the design.Through industrial experiments,this paper finds the new judgment and treatment method of multi-phase blocking flow,and has a good effect after actual inspection.