密相半干法低温同时脱硫脱硝影响因素  

Influencing factors during simultaneous removal of NO_x and SO_2 in semi-dry dense bed at low temperature

作　　者：赵荣志[1,2] 梁宝瑞[1] 宋存义[1] 冷廷双[1,3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京首科兴业工程技术有限公司,北京100041 [3]首钢总公司环保产业事业部,北京100041

出　　处：《环境工程学报》2013年第12期4945-4950,共6页Chinese Journal of Environmental Engineering

摘　　要：针对90～160℃的低温条件下，SO2对钙基吸收剂吸收NOx的影响进行了实验研究，分析了烟气温度T、含氧率、含湿量等对SO2促进钙基吸收剂吸收NOx的影响。实验结果表明，当烟气中SO2浓度的升高可促进钙基吸收剂对NOx的吸收；同时，维持反应系统在9．2％的含湿量；保证烟气温度在结露点以上，使系统在90～100℃的温度区间；控制系统漏风率，防止含氧率的升高；保证前端电除尘效率的同时，将一部分电除尘捕集到的灰尘作为钙基脱硫剂的添加剂，并使之参与脱硫反应器内的钙基吸收剂循环过程中；可较多地脱除烟气中的污染物质。The influence of SO2 on absorption of NOx by calcium-based sorbent at low temperatures of 90 to 160℃ was studied. The effects of gas temperature （ T）, O2 concentration and humidity on the simulative absorption effectiveness of NOx by calcium-based sorbent were analyzed. Experimental results show that the increase of SO： concentration in the flue gas can promote the NOx absorption of calcium-based sorbents. In the meantime, better contamination removal would be achieved when the humidity, gas temperature and air leakage rate were controlled at 9.2%, 90 - 100℃, and a reasonable value, respectively, to prevent the increase of O2concentra- tion, garantee electro-precipitating efficiency, and make some electro-precipitating dust to be additive of calciumbased sorbent in the process of desulfurization reactor.

关 键 词：钙基吸收剂 含氧量 含湿量 氮硫比 胶凝反应 

分 类 号：X701[环境科学与工程—环境工程]