摘要
为了明确城市固体废弃物中的塑料组分燃烧时生成的多环芳烃的特性,以及相应的抑制措施,在小型三段流化床上进行了混合塑料的燃烧试验,研究了不同燃烧温度时,以及相同一次风下二次风配比比例不同时多环芳烃的生成特性。并就混合塑料添加煤和不添加煤燃烧时多环芳烃的生成水平进行了比较。结果显示,混合塑料燃烧时,多环芳烃排放总量要比单组分燃烧多环芳烃量加权平均后的水平低;添加煤燃烧时,排放水平比不添加煤有明显的下降,在加20%的煤的时候排放水平最低;一次风量相同时,加适当比例(约0.20时)的二次风,可以取得抑制塑料垃圾生成多环芳烃的最佳效果。
In order to find out the special features of PAH (polycyclic aromatic hydrocarbon) formed by plastic ingredients, contained in city solid wastes, during combustion and ascertain effective countermeasures for inhibiting its emission, a series of combustion tests were performed with various plastic mixtures on a small sized three-stage fluidized bed under varying temperature, and also under constant primary air flow, but changing secondary air ratio conditions. PAH generation levels of burning plastic mixtures, with and without the addition of coal, were compared. Test results show that the total PAH emitted by burning a multicomponent plastic mixture is lower than the weighted mean, obtained for the individual components. PAH emission level was obviously reduced by burning with addition of coal, and the lowest level was obtained by adding 20% coal. With primary air kept constant, optimum effect was obtained with a suitable portion of secondary air (about 0.20).
出处
《动力工程》
EI
CSCD
北大核心
2005年第2期298-303,共6页
Power Engineering
基金
国家重点自然科学基金(N59836210)
国家重点基础研究发展规划项目(G1999022211)
关键词
环境工程学
混合塑料
流化床
多环芳烃
城市生活垃圾
二次风
environmental engineering
plastic mixture
fluidized bed
PAH
city living garbage
secondary air
