文丘里洗涤器氢氧化钠吸收二氧化硫的传质模型

为了准确预测文丘里洗涤器中的气液传质状况，进而对整个装置进行结构优化和操作条件优化，采用带有有限反应速率的二阶不可逆反应来描述氢氧化钠溶液与二氧化硫的反应，并考虑轴向涡流扩散与相对速度的影响，得到了一个描述文丘里内气液传质的宏观模型．并将理论模型的脱硫效率预测值与实验值进行了对比．结果表明，二者吻合良好，3种不同结构尺寸的文丘里洗涤器相对误差的算术平均值均小于5％，最大相对误差为-8．07％．

Mass Transfer Model for SO2 Absorption by NaOH Solution in Venturi Scrubber

In order to understand the process of mass transfer from flue gas into the scrubbing liquid in a venturi scrubber and optimize the design and industrial operation of the whole desulfurization units, a onedimensional mathematical model was proposed to predict the removal efficiency with second-order chemical reaction in venturi scrubbers. To describe accurately the mass transfer mechanism occurring in venturi scrubbers, the relative velocity of gas and droplets, and axial eddy diffusivity were considered. Comparison shows that experimental data and the predicted results by the present model are in good agreement, Average values of relative error of three venturi scrubbers with different dimensions are all less than 5% and the maximum relative error is - 8.07%.