Study On Heat Transfer And Hydrodynamics Of The Three Phase Circulating Fluidized Bed Evaporator

In this paper, we applied the vapor-liquid-solid three-phase circulating fluidized bed evaporator to condense glucose solution considering its advantage. In the experiment, we changed the parameters such as evaporation temperature, difference in temperature of the fluid heating and heated, liquid flux, liquid thickness and the ratio of inert particles to analyze and study this kind of equipment's heat transfer properties in different operational conditions. A model was put forward and the theoretic value that calculated with it accorded with the experimental value well. At the same time, we also studied the pressure drop of the bed and the status of preventing and cleaning fouls.The results show that the heat transfer coefficient of vapor-liquid-solid three-phase circulating fluidized bed evaporator is 1.5 times of the vapor-liquid two-phase evaporator's. Inert particles can prevent and clean the fouls. This kind of evaporator fit for the condensing of the glucose solution and it maybe used broadly in foodstuff field in the future.