关键词: 液固两相流化床, 压降, Kenics静态混合器, 扭率, 换热器, 水平管

Abstract: By setting a Kenics static mixer into the device of horizontal liquid-solids two-phase fluidized bed heat exchange tube，experiment was performed using saturated calcium sulfate solution as working medium. The pressure drop results of the horizontal liquid-solids fluidized bed heat exchange tube with a Kenics static mixer were presented. The effects of working fluid velocity，Kenics static mixer twist ratio，solids volume fraction and size on pressure drop were discussed，and compared with the variation of pressure drop in cold state. The pressure drop of setting the Kenics static mixer in heat exchange tube was found to be about 20%—140% over the case without setting the Kenics static mixer under the same operation conditions. Pressure drop increased with increasing Reynolds number and decreased with increasing twist ratio. Moreover，pressure drop was found to increase with increasing volume fraction，but the effect was not significant. On the basis of experiment data，an empirical equation for pressure drop was established. It provides some theoretical information for the optimal design of the liquid-solids two-phase fluidized bed.

Key words: liquid-solid two-phase fluidized bed, pressure drop, Kenics static mixer, twist ratio, heat exchanger, horizontal tube