氨法烟气脱硫中的氨逃逸  

Ammonia Escape in Flue Gas Desulphurization by Ammonia Method

作　　者：宋桂东[1] 万皓[1] 邵申[1] 产文兵[1] 顾晓婧[1] 

机构地区：[1]上海大学环境与化学工程学院射线应用研究所,上海200444

出　　处：《上海大学学报（自然科学版）》2013年第6期615-618,共4页Journal of Shanghai University:Natural Science Edition

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA064102)

摘　　要：以脱硫喷淋塔出口的游离氨气为监测对象,通过模拟烟气实验,研究了吸收液的pH值、浓度、液气比(liquid to gas,L/G)和进口烟气温度等对氨逃逸量的影响.实验结果显示,随着吸收液pH值、浓度和液气比的增加,氨逃逸量逐渐增多.为减少氨逃逸,保证高脱硫率,得到较为合适的工艺参数如下:pH=6.0,吸收液浓度为1%,液气比为4 L/m^3.从氨逃逸和硫酸铵结晶两方面综合考虑,进口烟气温度控制在90~110℃较为合适.In the simulation of flue gas, free ammonia at the export of spray tower was used as the monitoring object. Factors of influence including pH value and concentration of absorption liquid, volume ratio of liquid to gas （L/G） and inlet gas temperature on the efficiency of flue gas desulphurization （FGD） were studied. Experi- mental results show that the amount of ammonia escape increases as the pH value, concentration of absorption liquid and L/G increase. To control ammonia escape and the high rate of desulphurization, appropriate pa- rameters should be used, including pH value of 6.0, concentration of absorption （（NH4）2SO3） of 1%, L/G of 4 L/m3, and inlet gas temperature of 90-110 ℃.

关 键 词：氨法 烟气脱硫 氨逃逸 

分 类 号：X511[环境科学与工程—环境工程] X701.3