石灰石-石膏法烟气脱硫过程中SO_3酸雾脱除特性  

Removal properties of sulfuric acid mist during limestone-gypsum flue gas desulfurization process

作　　者：潘丹萍[1] 吴昊[1] 黄荣廷 张亚平[1] 杨林军[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《东南大学学报（自然科学版）》2016年第2期311-316,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21276049);国家重点基础研究发展计划(973计划)资助项目(2013CB228505);国家高科技研究发展计划(863计划)资助项目(2013AA065004);江苏省环境监测科研基金资助项目(1412)

摘　　要：基于石灰石-石膏法烟气脱硫工艺,分析探讨了湿法烟气脱硫（WFGD）过程中对SO_3酸雾脱除机理,并考察了脱硫操作条件、塔入口烟气飞灰浓度及不同煤质组分对SO_3酸雾脱除效率的影响.结果表明,湿法烟气脱硫过程中SO_3酸雾可通过脱硫浆液的吸收以及对吸附SO_3酸雾颗粒物的捕集而脱除.单塔湿法烟气脱硫系统对SO_3酸雾脱除效率为25%~50%;随着脱硫液气比和脱硫塔入口飞灰浓度增加、脱硫入口烟气温度下降,湿法烟气脱硫系统对SO_3酸雾脱除效率均有所提高.实际电厂双塔湿法烟气脱硫系统对SO_3酸雾脱除效率为50%~65%,随着煤中硫分与灰分的增加,SO_3酸雾脱除效率随之提高.Based on the limestone-gypsum flue gas desulphurization technology,the removal mechanism of sulfuric acid mist during the wet flue gas desulphurization process（ WFGD） was analyzed,and effects of desulfurization operational conditions,fly ash concentration before desulfurization and coal quality on sulfuric acid mist removal efficiency were also investigated. The results showthat the sulfuric acid mist can be removed by the absorption of the desulfurization slurry and the capture of particles absorbing sulfuric acid mist. The sulfuric acid mist removal efficiency across the single desulfurization scrubber is from 25% to 50%. With the increase of the gas-liquid ratio and the fly ash concentration before desulfurization,and the decrease of flue gas temperature before desulfurization,the sulfuric acid mist removal efficiency increases. For the desulfurization process with double scrubbers in a certain power plant,the sulfuric acid mist removal efficiency is from 50% to 65%. With the increasing content of sulfur and ash in the coal,the removal efficiency increases.

关 键 词：石灰石-石膏法脱硫 燃煤烟气 SO3酸雾 脱除 

分 类 号：X51[环境科学与工程—环境工程]