沸腾床渣油加氢裂化装置紧急泄压限流孔板核算

Checking calculation of emergency pressure relief orifice inebullated-bed residue hydrocracking unit

在事故处理中,高压加氢装置的紧急泄压速率对于安全生产至关重要。装置的紧急泄压速率与紧急泄压系统限流孔板孔径等参数相关。文中介绍了一种沸腾床渣油加氢裂化装置紧急泄压系统限流孔板孔径的校对计算方法。通过理论计算验证装置的泄压速率是否满足设计要求,进一步计算实际需要的孔板孔径,从而大大减少了试验次数,缩短开工试车时间。以某炼油厂沸腾床渣油加氢裂化装置为研究对象,装置在试车阶段,高压氢气工况下启动联锁条件,手动打开紧急泄压阀按钮进行紧急泄压试验。根据计算公式校核孔板孔径,把试验孔板孔径由34.5 mm改为41.0 mm,经过试验验证满足实际生产要求。

The emergency pressure relief rate is very important for the safe operation of high pressure hydrogenation unit in the handling of the accident.The emergency pressure relief rate of the unit is related to the pore size of emergency pressure relief orifice.A calculation method is introduced for checking the pore size of emergency pressure relief orifice in ebullated-bed residue hydrocracking unit.The pressure relief rate is theoretically calculated to verify whether it could meet the design requirement,and further calculated the actual required orifice pore size,thus the number of tests and the initial start-up time of the unit could be minimized significantly.The ebullated-bed residue hydrocracking unit of a refinery is studied.In the test phase of the unit,the interlock condition is started under high pressure hydrogen,and the emergency pressure relief valve button is manually opened for emergency pressure relief testing.According to the calculation,the pore size of the orifice is checked.After actual experimental verification,the pore size of the test orifice is changed from 34.5 mm to 41.0 mm,which meets the practical production requirements.