摘要
利用AERMOD模型对某1 000 MW燃煤机组改造前后排放NO_X在大气中的传输、扩散过程进行了模拟,定量计算了NO_X环境浓度及其分布情况。研究发现:通过超低排放改造项目削减NO_X排放,可使环境空气中NO_X最大落地浓度大量减少、占标率明显下降;各峰值分布区域污染物浓度降幅显著,各时段均值占标率大幅下降;全区域各时间段浓度值均降低、分布梯度变小。研究结果表明:火电行业通过"超低排放"进一步控制NO_X污染对环境影响正效益显著,发电厂周边环境空气质量得以整体大幅提升。
The diffusion and transmission in the atmosphere of NOX emissions from a 1 000 MW coal-fired power plant is simulated by using AERMOD modeling system to calculate the ambient concentration and distribution of NOX. The results show that the reduction of NOXby ＂ultra-low emission＂ transformation enables greatly reduction of maximum ground concentration in ambient air and decrease of the ratio to standard concentration; the pollutant concentration in peak distribution area decreases and the mean values to standard concentration at each time period are lowered greatly; the concentration value in the whole region at every time period decreases and the distribution gradient of NOXbecomes smaller. The research shows that further control of thermal power industry over NO_Xpollution by ＂ultra-low emission＂ has positive benefit on the environment, and the ambient air quality around the power plant is notably improved.
出处
《浙江电力》
2016年第12期21-25,共5页
Zhejiang Electric Power
