煤焦油加氢工艺分离流程模拟研究

STUDY ON SIMULATION OF SEPARATION PROCESS FOR COAL TAR HYDROGENATION

应用Aspen Plus模拟软件,对20万t/a BRICC非均相悬浮床煤焦油加氢产品的分离流程进行了模拟研究.模拟结果表明,在低温高压分离器分离过程中有较多的轻油组分的损失.在此基础上设计利用常压分馏中油对低温高压分离器气相组分进行油洗回收,以减少轻油组分的损失.得到满足回收要求的最低中油消耗量为3 500kg/h.油洗后,轻油组分损失量最大的332K馏分的损失由未油洗前的26.98%降低到5.31%,油洗效果显著.模拟结果对BRICC非均相悬浮床煤焦油加工技术的工业化设计具有重要的指导意义.

By the application of Aspen Plus simulation software, the product separation process of BRICC coal tar hydrocracking with heterogeneous suspending - bed reactor which the scale is 200 000 t/a was studied. According to the analysis of the simulation results, more light oil component was lost in separation process of high pressure separator at low temperature. In or- der to reduce the loss of light oil, we used atmospheric distillation medium oil as wash oil to wash and recover the gas phase component of high pressure separator at low temperature in this work. The simulation results show the minimum quantity of medium oil consumption to satisfy the recovery is 3 500 kg/h. And after oil washing, the loss of the most light component 332 K has re- duced to 5.31% from 26.98% The effect of recovery is obvious. The simulation results have im- portant guiding significance to industrial design of BRICC coal tar hydrocracking with heteroge- neous suspending-bed.