催化裂化装置旋风分离器料腿翼阀系统排料流态的实验分析

Experimental Analysis of Discharge Patterns of Cyclone Dipleg-Trickle Valve System in Fluid Catalytic Cracking Unit

针对催化裂化装置旋风分离器料腿翼阀系统的排料过程,在150mm×5000mm料腿冷模实验装置中悬空安装翼阀,在颗粒质量流率0-50kg/（m^2·s）、负压差0-11kPa范围内进行系统的排料实验,考察负压差和颗粒质量流率对排料过程的影响。结果表明,料腿翼阀系统的排料流态有连续式滴流状排料和间歇周期性节涌状排料2种形式。负压差小、颗粒质量流率大,排料流态趋于连续式滴流排料;负压差大、颗粒质量流率小,排料流态趋于间歇式周期性排料。2种排料流态随负压差和颗粒质量流率的变化可以互相转换。根据实验数据还提出了旋风分离器料腿翼阀系统的排料相图。

An experiment was conducted on a150mm×5000mm dipleg experimental apparatus to study the discharge process of dipleg-trickle valve system of cyclone in the fluid catalytic cracking unit（FCCU）.The dipleg exit was arranged so that the trickle valve could suspend in the hopper.The experiment focuses on the effects of negative pressure drop（0-11kPa）and solid flux rate（0-50kg/（m^2·s））on the discharge pattern.The experimental results showed that there were two discharge patterns in the dipleg-trickle valve.The one is continuous trickling discharge at low negative pressure drop and high solid flux rate.The other one is intermittent periodic dumping discharge at high negative pressure drop and low solid flux rate.The two discharge patterns can transform each other as the negative pressure drop or solid flux rate varying.The discharge regime map was proposed according to the experimental data,which related to the negative pressure drop and solid flux rate.