循环流化床烟气脱硫效率的研究

Simulation Study on Desulfurization Efficiency of Flue Gas in Circulating Fluidized Beds

基于对气固传质、气固反应模型、浆滴蒸发等理论,从物料循环对热力学参数、传质过程和化学参数的影响几个方面对物料循环的作用过程进行研究。通过对循环流化床烟气脱硫物料循环过程的研究与分析,提出物料循环对脱硫效率的贡献由新鲜吸收剂脱硫效率的提高和循环物料中未完全反应的吸收剂参与脱硫反应产生的脱硫效率两个部分组成,还提出了物料循环对热力学、传质以及化学等参数影响的模拟计算方法。实验验证了方法的可行性与有效性。

Based on the theories of gas-solid mass transfer, modes of gas-solid reactions and slurry evaporation, the circulating process of materials is being studied from the point of view of its effect on thermodynamic parameters as well as on mass transfer and chemical parameters. By researching and analyzing the circulating process of flue gas desulfurizers in circulating fluidized beds, the conclusion is drawn that two factors contribute to the improvement of desulfurization efficiency： one is enhanced desulphurization by freshly added absorbents and the other is by the process participation of the remainiing part of absobents ini the circulating mass, which has not yet taken part in the reaction. Simultaneously, a simulation calculation method for evaluating the effect of material circulation on the thermodynamic mass transfer and chemical parameters is presented, herewith realizing the simulation of desulfurization efficiency calculation. Test results have verified the feasibility and effectiveness of tghe method. Figs 3 and refs 12.