半干式喷雾干燥法烟气脱硫工艺讨论 摘要：[目的] 在中等试验台上讨论烟道作为脱硫反应器的半干法烟气脱硫技术，确定工艺条件，重点在提高脱硫效率和脱硫剂利用率。[方法] 选用半干式喷淋塔脱除烟气中的SO2。[结果] 1.脱硫效率虽然随钙/硫比（Ca/S）的增加而增加(Ca/S 为 0.806 时，平均去除效率为 57.53%; Ca/S 为 1.207 时，平均去除效率为 77.34%; Ca/S 为 1.414 时，平均去除效率为 80.75%)，但当 Ca/S>1 以后脱硫增加率趋缓。2.伴随 SO2进口浓度的增加，脱硫效率略有增加。3.随 Ca/S 的增加，脱硫剂利用率有所下降。4.加入一定量 NaCl 添加剂对提高 SO2去除效率影响不很明显(平均去除率约提高 2%)，但对稳定去除效率有所帮助。[结论]1. 提高 Ca/S 是提高脱硫效率的一种有效方法，综合对脱硫效率和脱硫剂利用率的影响，Ca/S 在 1.0～1.4 范围内较为合适。2.循环利用脱硫剂是提高脱硫剂利用率的有效方法 。3.NaCl 添加剂适合工况变化较大的焚烧处理系统。 关键词：半干法烟气脱硫；Ca/S；脱硫剂；NaCl 添加剂The Research of SO2 Removal by Semidry Spraying Tower Abstract: [Objective] To evaluate the operation conditions of Semi-dry Flu Gas Desulfurization and its influence factors on bench-scale equipment; to investigate how to improve the SO2 removal efficiency and the utilization of sorbent. [Methods] SO2 in flue gas can be removed by spraying tower. [Results] The removal efficiency of SO2 will be improved with the increase of Ca/S ratio. Under the experiment condition of different Ca/S ratios as 0.806, 1.207 and 1.414, the average SO2 removal efficiency is 57.53%, 77.34% and 80.75%, respectively. When Ca/S>1, however, the increase of SO2 removal efficiency becomes insignificant. With respect to the initial concentration of SO2, no appreciable effect on the removal efficiency has been observed so far. The utilization efficiency of sorbent is found to decrease with the increase of Ca/S. The sorbent with NaCl added cannot increase SO2 removal efficiency sign...
