The Study On Particle Distribution In Solid-Liquid Circulating Fluidized Bed With Distributor

A solid-liquid fluidized bed has been designed and installed ,which will be used in the heat exchanging and descale field .The experimental study for distributor design was carried out and the particles distribution in the tubes of the solid-liquid fluidized bed under different operating conditions was studied by using the CCD measure system .Experimental results show that heterogeneous pores distributor which was arranged in the inlet chamber of the solid-liquid fluidized bed can improve the nonuniform distribution of particles in the pipe bundle under high flow rate . The nonuniform decreases by decreasing the mount of pore, but the solid holdup decreases too. The particles distribution is influenced by the position of the heterogeneous pores distributor. The nonuniform of distribution decreases with the increase of the distance between distributor and the tubes inlet in operating range. So based on the given operating range, the reasonable pore rate and position of heterogeneous pores distributor can be determined to obtain the distribution of particles as homogeneous as possible. According to the experimental result ,the relevancy formulae were proposed, and according to discrete particle model, particle velocity distribution model was proposed and the experimental result agreed with the calculated result.