Study On Sampling Method For Dust Concentration Of Regenerated Flue Gas In Catalytic Unit

Catalytic Cracking Unit Flue gas turbine is not only a key equipment, but also an important energy-saving facilities, its operating conditions will directly affect the device's operating cycle and energy consumption levels. Catalytic regeneration of flue gas dust content is too high will cause fouling scale, thus affecting the stable operation of the smoke machine. Therefore, the accurate determination of catalyst particle concentration in flue gas is very important to evaluate the efficiency of three-rotation and guarantee the safe operation of smoke machine. It is difficult to determine the concentration of dust in the flue gas because the particle size of the solid particles in the flue gas is micrometer and the flue gas temperature is high.In this paper, simulation and experiment on the catalytic high temperature regeneration of flue gas dust sampling method research. First, the FLUENT simulation software was used to model the sampler and flue, and the influence of different sampling tube parameters on the sampling process was analyzed. Through the research on the trajectory of the solid particles during the sampling process, the accuracy and sampling of the sample were verified.. The gas-solid two-phase flow in different diameter flue is simulated to study the effect of pipe size on the dust concentration distribution. According to the experimental results, the accuracy of the simulation result of the sampler FLUENT is verified. It is further proved that the flue gas dust sampling must be carried out under the constant velocity conditions. Finally, the effects of different operating conditions and structural parameters on the separation performance of the cyclone were investigated.