湿法液柱喷射烟气脱硫工程性能

Pilot plant study of wet slurry jet flue gas desulfurization

在沈阳化肥厂脱硫示范工程上进行液柱喷射烟气脱硫系统的性能研究。根据试验结果,提出了单位体积浆液吸收SO2的量与浆液的pH值呈幂函数关系。烟气体积流量的增加有利于液滴的表面更新作用;入口烟气SO2浓度的增加有利于反应传质推动力的增加;循环浆液量的增加将增加液滴间合并趋势。前两者有利于脱硫反应,但入口SO2总量的增加导致脱硫效率下降;后者不利于脱硫反应,但脱硫浆液量的增加导致脱硫效率增加,其变化规律符合液柱喷射烟气脱硫机理。

The performance of a wet slurry jet flue gas desulfurization (FGD) system was measured in a pilot plant in Shenyang, China. The results show that the absorbed SO_2 per unit volume of slurry is related exponentially to the slurry pH. An increased flue gas volumetric flow rate enhances the droplet surface renewal effect, an increased inlet SO_2 concentration enhances the mass transfer driving force, and an increased recycle slurry flux enhances the droplet agglomeration. The increased flue gas flow rate and inlet SO_2 concentration enhance the desulfurization reaction, while an increased gross inlet SO_2 flow rate reduces the desulfurization efficiency. Increases in the slurry flow rate increase the desulfurization efficiency, which illustrates the advantages of the wet slurry jet FGD.