关键词:

旋风分离器, 升气管外壁, 结焦, 双入口, 径向压力梯度

Abstract:

The tangential velocity and static pressure distribution at the outer wall of vortex finder through a single and a double inlet cyclone were simulated using RSM model.It is shown that the adverse and favorable pressure gradient zone along the outer wall of vortex finder of the double-tangential-inlet cyclone separator is much smaller than that in single-tangential-inlet cyclone separator.The tangential gas velocity around the vortex finder wall has no significant fluctuation and the easy deposit area for oil drip and catalyst is relatively small.There is no stagnant flow area, and the back flow zone near vortex finder wall is not prone to yield.Consequently the probability of coke accumulation on the outer wall of vortex finder of a double-tangential-inlet cyclone is less than that in a single-tangential-inlet cyclone.On the other hand, in double-tangential-inlet separator, the average shearing strength to the coke deposited on the outer wall of vortex finder is large and the average radial pressure grads force is small, which suggests less coking and thinner coke layer on the outer wall of vortex finder.

Key words:

旋风分离器, 升气管外壁, 结焦, 双入口, 径向压力梯度