流化催化裂化装置烟机结垢原因分析

STUDIES ON FOULING OF FLUE GAS TURBINE IN FCCU

流化催化裂化装置烟机结垢是导致烟机故障率居高不下的主要原因。针对某石化公司催化裂化装置烟机结垢问题,分析了烟机内细粉、结垢物和所用催化剂的成分,确认了催化剂颗粒存在磨损;测定了新鲜催化剂、平衡催化剂、细粉以及结垢物的比表面积、孔体积等,研究了细粉沉积体系的致密化过程。结果表明,导致烟机结垢的主要原因是催化剂颗粒产生的细粉,烟机结垢是一个粉末烧结过程。

The fouling of flue gas turbine in fluid catalytic cracking unit （FCCU） causes the high failure rate of the turbine. The wear of catalyst particle was confirmed by analyzing the chemical compo- sition of powder, fouling materials and catalyst in the trouble machine in a petrochemical corporation. It is found that the densification of deposited fine powder is a sintering process, proved by measuring the specific surface areas and pore volumes of the fresh catalyst, equilibrium catalysts and powder. It is the powder deposition and subsequent sintering that leads to the failure of the flue gas turbine.