湿法烟气脱硫系统中FAS式氧化装置性能的试验研究

An Experimental Investigation of Properties of FAS Oxidation Equipment in Wet Flue Gas Desulfurization

进行了曝气器开孔直径、表观气速及孔排布置方式等因数对固定空气喷射器(FAS)式氧化装置性能影响的试验研究。结果表明:随着曝气器开孔直径减小,氧化速率提高;表观气速增加,氧化速率增加,但当表观气速增大到一定值后,氧化速率增加的趋势减缓;曝气器与氧化槽当量直径比值D/D0增加时,氧化速率增加;但当D/D0大于0.8时,氧化速率变化较小。孔排布置方式对氧化速率影响较大,对不同的开孔直径,存在一合理的孔间距与孔径的比值,使氧化槽具有较高的氧化能力;尽量保证各喷管出口流量均匀,改善氧化槽中的气液分布。

A simulation experimental bench of fixed air sparger (FAS) oxidation equipment was established. The effect of holes diameter of the sparger, superficial velocity, arrangement of holes and the sparger equivalent diameter on oxidation characteristics of FAS oxidation equipment have been conducted. The experimental results show that with decreasing holes diameter of the sparger, the oxidation rate (OR) increases; with increasing the superficial velocity, the OR increases, but when the superficial velocity increases to a certain value, the increase of the OR begins to slow down; with increasing the ratio value D/D0 of equivalent diameter of the sparger to oxidation tank , the OR increases, but when the D/D0 is larger than (0.8), the increase of the OR is slow down; the influence of holes arrangement on the OR is large, for different holes diameter, there would be a rational ratio value of holes diameter of the sparger to the distance between the holes, the higher OR can be gained; the same flow rate of every hole should be guaranteed, thus, the flow field could be improved. Figs 10 and refs 5.