催化裂化再生烟气颗粒物浓度及粒度测量分析

催化裂化再生烟气中颗粒物的浓度和粒度检测分析对于能量回收系统的正常运行是至关重要的。针对再生烟气高温带压的现场条件,预测流速法是非常合适的检测方法,通过对再生烟气的检测可以对三旋、烟机的运行情况做出一定的反馈和技术指导,保证设备的平稳运行。测定烟气中粉尘含量及粉尘粒度分布,并计算三旋分离效率。结果表明,三旋入口催化剂的标况下湿基浓度为1 025 mg·Nm~(-3),Dv(50)=29.713μm,出口催化剂标况下湿基浓度为309 mg·Nm~(-3),Dv(50)=2.660μm,三旋总分离效率为69.85%。

Measurement and analysis of particle concentration and particle size in FCC regeneration flue gas

It is very important for the normal operation of energy recovery system to detect and analyze the concentration and particle size of particles in FCC regeneration flue gas.According to the site conditions of high temperature and pressure of regenerated flue gas,the predictive flow rate method is a very suitable detection method.Through the detection of regenerated flue gas,it can make certain feedback and technical guidance for the operation of three rotary and flue gas turbine,so as to ensure the stable operation of the equipment.The dust content and particle size distribution in flue gas were measured,and the separation efficiency was calculated.The results showed that the total separation efficiency was 69.85% with the wet base concentration of 1 025 mg·Nm^-3,Dv(50)=29.713 μm in inlet and 309 mg·Nm^-3, Dv(50)=2.660 μm in outlet under standard conditions.