摘要
2016年底我国建成投运的超低排放机组容量4.4亿k W,占全国煤电机组容量的49%,形成了全世界最大的清洁煤电体系,电力行业三大常规污染物烟尘、SO_2、NO_x大幅下降。湿烟气中以SO_3为主的可凝结颗粒物、雾滴及其溶解盐的排放逐渐受到重视,超低排放机组烟气中排放的SO_3浓度介于1.1~36 mg/m^3,平均值为8.9 mg/m^3;溶解盐浓度介于0.15~2.0 mg/m^3。湿烟气加热排放,可以消除"湿烟羽"现象,但不能减少非常规污染物排放。通过采用凝变除湿技术,可以收集湿烟气中部分水,并减少非常规污染物的排放。凝变湿电一体化工艺在某630 MW机组上的应用表明,其对湿烟气中雾滴(溶解盐)、SO_3、PM_(2.5)的脱除率分别为75.2%、76.0%、77.4%。
By the end of 20]6, the capacity of ultra - low - emission units which had been put into operation in our country was 440 million kW, accounting for 49% of the coal - fired power generating units capacity nation wide and forming the worlds largest clean coal power system. Three conventional pollutants in the power industry that includes dust, SO2, NO, dropped significantly. The emission of SO3 - based condensable particles, mist drop- let,sand dissolved salts in the wet flue gas is paid more attention gradually. The SO2 concentration in the flue gas of the ultra - low - emission units ranges from 1. ] mg/m3 to 36 mg/m3 with an average value of 8.9 mg/m3. Dis- solved salts concentration was between 0. 1.5 - 2.0 mg/m3. Heating of wet flue gas can eliminate the ＂wet plume＂ phenomenon, but it cannot reduce the unconventional pollutants emission. The integrated technology of phase -transition agglomeration and dehumidification can collect part water in the wet flue gas and reduce un- conventional pollutants emission. And the integrated technology of phase -transition agglomeration and dehu- midificationwas applied on a 630 MW unit. Results show that, the removal efficiency of mist droplets （ dissolved salts）, SO3 and PM2.5 in wet flue gas is 75.2%, ？6.0% and 77.4% respectively.
出处
《电力科技与环保》
2018年第1期23-26,共4页
Electric Power Technology and Environmental Protection
关键词
清洁煤电
非常规污染物
排放
凝变除湿一体化
clean coal power
unconventional pollutants
emission
integration of phase- transition agglomera-tion and dehumidification
作者简介
朱法华（1966-），男，江苏人，博士，教授级高级工程师，长期从事电力环境保护科研工作。E-mail：zhufagua@nepri．com
