循环流化床烟气脱硫床料的质量平衡和化学成份的变化

Mass Equilibrium of Gas Desulfurization Bed Materials in a Circulating Fluidized Bed and the Variation of Chemical Composition

对循环流化床内脱硫过程中床料的质量、化学成份的变化进行了理论分析 ,发现当选定循环倍率 5～ 5 0后 ,只要分离器的效率达到 83%～ 98% ,床内就可以维持质量平衡。当操作参数变化引起床内物料质量改变时 ,改变离开床的床料量可以很快达到平衡 ;而化学成份的动态是不平衡的 ,它的过渡过程与床内的床料量、反应产物的产率以及相关参数的变化幅度等有关。

A theoretical analysis was conducted of the variation of bed materials mass and chemical composition in the desulfurization process in a circulating fluidized bed. It has been found that with the circulation ratio selected at 5-50 and the effectiveness of a separator attaining 83%-98% it is possible to maintain a mass equilibrium in the bed. In case a change of operating parameters gives rise to a change of mass of in-bed materials, it is possible through a quantitative change of bed materials leaving the bed to attain equilibrium very rapidly. By contrast, the dynamic state of chemical composition is unbalanced. Its transition process has been found to be dependent on bed material quantity in the bed, production rate of reaction products and the variation range of related parameters, etc.