塔内运行温度对循环流化床烟气脱硫效率影响的试验研究

摘要

In this paper,The circulating fluidized bed（CFB）flue gas desulfurization system of a power plant was studied.A problem of the desulfurization system has arisen during text run that SO2 removal efficiency is too low.In this study,the effect of SO2 concentration and outlet temperature on desulfurization efficiency was carried out on a text stand.The results showed that the desulfurization efficiency decreased as outlet temperature increased.The desulfurization efficiency increased 20 percents when the outlet temperature decreased from 84 ℃ to 75 ℃.In the outlet temperature of 75 ℃,the desulfurization efficiency was the highest.In the condition of other parameters remaining unchanged,the removal efficiency first increased and then decreased with the SO2 concentration increased.Under the text conditions,the highest desulfurization efficiency turned up at the inlet SO2 concentration of 1 700 mg/m^3 to 1 900 mg/m^3.The exit temperature has been adjusted according to the results.The operational results showed that decreased the outlet temperature to 75 ℃ led the desulfurization efficiency rising to 88%.%针对某电厂循环流化床烟气脱硫系统运行期间存在的脱硫效率很低的问题进行探讨,并对吸收塔入口SO2浓度和出口温度对脱硫效率的影响进行了试验研究。结果表明,脱硫效率随烟气出口温度的降低而升高,当出口温度从84℃降低到75℃时,脱硫效率可提高20%;在其它条件不变的情况下,脱硫效率随入口SO2含量的增加呈现先上升后降低的趋势。在试验条件下,入口SO2含量在1700 mg/m^3到1 900 mg/m^3之间脱除效率最高;根据试验结果对出口温度进行调节,运行结果表明,降低出口温度到75℃,脱硫效率可达88%。