Analysis of particle trajectories in a quick-contact cyclone reactor using discrete phase model (DPM)

Conference Dates

May 22-27, 2016


A quick-contact cyclone reactor has been designed for residue fluid catalytic cracking instead of riser reactor. It mainly consists of a mixing-reaction chamber and a separation chamber. So the cracking reactions and the separations between the products and catalysts could occur respectively and simultaneously. In order to reveal the mechanism of the mixing and separation of gas-solid in the quick-contact cyclone reactor, the particle trajectories in the reactor were investigated using discrete phase model (DPM). The results show that the particle trajectories in the quick-contact cyclone reactor could be described as three types: escaped, trapped and ring. And the pre-vortex flow was observed in the mixing-reaction chamber. However, the solid-gas following property in it was inferior to that in the separation chamber. In addition, the particle grade efficiencies of the cyclone were obtained by counting the numbers of escaping and capturing particles. It was shown that the particles which have a size larger than 10 μm were separated completely from the reactor. Moreover, the Rossin-Rammler equation was found to the size distribution curve fitting. The separation efficiency in simulated method was higher than 98%. And the error between the simulated and experimental results was no more than 1.31%, which indicates that the simulated results are reliable and accurate.

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