The Study On The Circulating Fluidized Bed Flow Character In Pipe

The experiment apparatus to apply to study the flow behavior of solid and liquid circulating fluidization bedvtos designed and built by oneself in this paper. Frame gathering and datum transact apply to measure the particle parameter was exploited .The flow character of solid and liquid circulating fluidization bed was invested by using CCD and laser, including distributing of concentration and velocity, using the concept of unequality degree,describing guantitatively distributing of concentration unequality degree .Physical field of particle concentration and velocity were built through MATLAB program. The experiment result : In some constant flow ,the unequality degree of particle decreases while concentration of particle increases. The concentration of particle in the pipe varie. while flux varie. The distributing of particle in laminar flow was near the pipe's wall.The distributing of particle in overflow is in the center of pipe. The study of axe velocity express :in some flow the velocity of particle varied while radial situation varied In laminar flow ,the particle radial velocity increase while radial situation increase; In onflow ,particle radial velocity produce wave while radial situation variedAccording th rebuilt concentration physical field, a two flow model had been proposed to predict connection among liquid velocity ,particle velocity and radial situation and concentration. And the predicted results agree with the experimental data well.