钙基脱硫剂掺加粉煤灰在450℃～850℃下的脱硫研究

　庞亚军　徐旭常

　　摘要　在沉降炉上进行了掺加粉煤灰提高生石灰烟气脱硫率的实验。实验表明：生石灰掺加粉煤灰可以提高烟气脱硫率和脱硫剂的钙利用率。这种作用与反应温度有关，反应温度为550℃～700℃时，效果最好。同时也研究了粉煤灰与生石灰掺混方式对气体脱硫率和脱硫剂的钙利用率的影响。
　　关键词　沉降炉　生石灰　粉煤灰　脱硫　反应温度　混合方式
　　中图分类号　X511

A Study on the Effect of Desulphurization of Calcium Sorbent by the Adding of Pulverized-coal Ash

Pang Yajun
Beijing Electrical Power College
Xu Xuchang
Qinghua University

　　By mixing pulverized-coal ash with caustic lime in a drop-tube furnace tests were conducted for enhancing SO2 removal rate. The test results show that the mixing of caustic lime with the pulverized-coal can result in an enhancement of the　SO2 removal rate and the calcium utilization rate of the calcium-based sorbent. This effect is dependent on the reaction temperature. An optimum effect can be achieved when the reaction temperature ranges from 550℃to 700℃. Also studied was the effect of the mixing mode of pulverized-coal ash with the caustic lime on the SO2 removal rate and the calcium utilization rate of the calcium-based sorbent.
　　Key words: drop-tube furnace, caustic lime, pulverized-coal ash, desulphurization, reaction temperature, mixing mode