喷淋式脱硫塔脱硫特性的试验研究

Experimental study of the Desulfurization Characteristics of a Sprinkling Type Desulfurization Tower

采用两种细度石灰石作为脱硫剂,对喷淋式脱硫塔的脱硫特性进行了试验研究,试验结果表明在一定烟气流速下,脱硫效率随液气比的增大而增大;在高烟气流速下,脱硫效率随液气比的增大而增加的趋势更加显著。脱硫效率随着提高浆液的pH值而提高,随入口烟气SO2浓度增加而下降;石灰石粒径越小,其溶解性好,有利于提高脱硫效率。结合吸收段阻力特性,分析得到该装置的一个最佳工况点:烟气流速2.31 m/s,循环浆液量50 m3/h,浆池pH值5.6～5.8时,脱硫效率为93.9%。

With limesone at two finenesses serving as the desulfurization agent,experimentally studied were the desulfurization characteristics of a sprinkling type desulfurization tower.The test results show that at a definite flue gas flow speed,the desulfurization efficiency will increase with an increase of the liquid-gas ratio.At a high flue gas flow speed,the tendency increasing the desulfurization efficiency with the liquid-gas ratio will be even more remarkable.The desulfurization efficiency will also increase with an increase of the pH value of the slurry and decrease with an increase of the SO2 concentration of the flue gas at the inlet.The smaller the particle diameter of the limestone,the better the dissolvability,more favorable to improving the desulfurization efficiency.In combination with the drag force characteristics in the absorption section,an optimal operating point of the device was obtained from an analysis.When the flue gas flow speed is 2.31 m/s,the circulating slurry flow rate is 50 m3/h and the PH value in the slurry pool ranges from 5.6 to 5.8,the desulfurization efficiency hits 93.9%.