气固钙基脱硫反应的钙平衡分析方法

基于脱硫剂反应前后钙元素总量守恒的原理,提出了一个分析钙基气固脱硫反应的新方法-钙平衡法。与纯粹从气相一侧分析脱硫过程相比,钙平衡法不但可以确定脱硫系统的效率,脱硫剂的利用率,还可以确定产物的类型,并指出不同位置脱硫产物的再利用价值的差异。对循环流化床中温钙基脱硫的具体工况物料分析结果表明,脱硫产物以硫酸钙为主,亚硫酸钙所占比例很小,伴生一定量的碳酸钙,脱硫剂的转化率与气相一侧测量值的换算转化率一致。

An Analytic Method Featuring Calcium Balance during a Gas-solid Calcium-based Desulfuration Reaction

Based on the total mass conservation principle of calcium element in a desulfurization agent before and after a reaction,the authors have proposed a novel method for analyzing a calcium-based gas-solid desulfurization reaction-calcium balance method.Compared with the method for analyzing the desulfurization process purely from the gas-phase side,the calcium balance method can determine not only the efficiency of the desulfurization system and the utilization rate of the desulfurization agent but also the type of products.Moreover,the difference in the recycling value of the desulfurization products at different locations can also be identified.The results of an analysis of bed materials under specific operating conditions for the calcium-based medium-temperature desulfurization process on a circulating fluidized bed(CFB) show that the desulfurization products mainly consist of calcium sulfate,and calcium sulfite accounts for a very small proportion with a concurrent generation of a certain amount of calcium carbonate.The transformation rate of the desulfurization agent is consistent with the conversion-based transformation rate of values measured at the gas-phase side.