【摘要】 应用自动烟尘测试仪在沙角C电厂1#炉静电除尘器前进行飞灰颗粒物采集,分析了煤种、负荷对飞灰细颗粒排放特性的影响,同时对飞灰颗粒粒径分布、化学成分、矿物含量和形貌特征等进行了研究。结果表明,机组负荷越高,飞灰颗粒越细,生成的PM1和PM2.5越多,但总的烟尘排放浓度随负荷升高而降低;随着伊泰煤的掺烧比例增大,飞灰颗粒粒径分布向细颗粒区域移动,PM1和PM2.5的含量增大。低负荷时易形成含有熔融小球体的煤胞结构,高负荷时易形成多孔煤胞。高低负荷和不同配煤的燃煤颗粒物矿物成分类似。更多还原

【Abstract】 Particulate matter from coal combustion is one of the most main atmospheric pollutants in urban China currently. It has caused serious damage to the environment and human health. A 3012H type automatic smokedust(flue-gas) monitor was used to collect PMs in front of the ESP of 1#boiler in Shajiao C pow er plant in Humen. The influence of boiler load and coal type on the emission characteristics of the fly ash was studied. The particle size distribution,chemical composition,mineral constituent and morphology characteristics of the fly ash were also analyzed. The results indicate that the fractions of PM1and PM2. 5increase with the rising of boiler load,how ever,the concentration of the total smoke-dust decreases. The level of PM1and PM2. 5becomes higher when the blending ratio of Yitai coal increases. The coal is easy to form coal cells containing molten spherules when burned in a high load boiler,and to form porous cenospheres when burned in a low load boiler. The mineral component of the ashes collected from different situations is similar.更多还原