The local bubble diameter profiles of the gas-liquid two-phase self-aspirated reversed flow jet loop reactor were studied experimentally by using internal camera CCD bubble measuring technology. The experimental resul...The local bubble diameter profiles of the gas-liquid two-phase self-aspirated reversed flow jet loop reactor were studied experimentally by using internal camera CCD bubble measuring technology. The experimental results show that the local Sauter bubble diameter profile decreases with increasing liquid jet flowrates and nozzle diameter in both the jet region and the tubular flow region inside the draft tube. Bubble diameter profiles follow inverse Gaussian Distribution in the jet effective region while inverse parabolic distribution in the tubular flow region inside the draft tube.展开更多
By using the developed gas-particle two-phase flow-reaction model,the simulation of particle dynamicswas carried out in a commercial riser in FCC. The results show clearly that the catalysts backflow seriously in the ...By using the developed gas-particle two-phase flow-reaction model,the simulation of particle dynamicswas carried out in a commercial riser in FCC. The results show clearly that the catalysts backflow seriously in the nozzle zone by the influence of shoot and congregate in the pipe center. In the upper part of the riser reactor,catalysts flow in a fully developed steady current and the radial distribution of particle concentration gradually becomes what happens in vertical tubes,because the influence of shoot is more and more weakened. It is easy to find out that shoot influences the hydrodynamics of particle-phase intensively.展开更多
文摘The local bubble diameter profiles of the gas-liquid two-phase self-aspirated reversed flow jet loop reactor were studied experimentally by using internal camera CCD bubble measuring technology. The experimental results show that the local Sauter bubble diameter profile decreases with increasing liquid jet flowrates and nozzle diameter in both the jet region and the tubular flow region inside the draft tube. Bubble diameter profiles follow inverse Gaussian Distribution in the jet effective region while inverse parabolic distribution in the tubular flow region inside the draft tube.
文摘By using the developed gas-particle two-phase flow-reaction model,the simulation of particle dynamicswas carried out in a commercial riser in FCC. The results show clearly that the catalysts backflow seriously in the nozzle zone by the influence of shoot and congregate in the pipe center. In the upper part of the riser reactor,catalysts flow in a fully developed steady current and the radial distribution of particle concentration gradually becomes what happens in vertical tubes,because the influence of shoot is more and more weakened. It is easy to find out that shoot influences the hydrodynamics of particle-phase intensively.
