生物质成型燃料燃烧挥发性有机物排放特性试验

以玉米秸秆、小麦秸秆、棉秆和木质4种生物质成型燃料为原料在生物质燃烧试验平台上,采用罐采样-GC/MS采集方法,研究分析了燃烧后烟气中的VOCs排放系数和组分,结果表明,4种生物质成型燃料的VOCs排放系数分别为0.447、1.111、0.601、0.104 g/kg,与散烧秸秆相比,成型燃料的VOCs排放系数仅为其50%;燃烧后VOCs排放组分占比最大的为卤代烃和酮,分别为49.8%和36.1%;4种生物质成型燃料燃烧VOCs排放总的臭氧生成潜势(以O3计)分别为4.792、25.737、9.598、4.502 g/kg,臭氧生成潜势比较高的化合物依次为:苯系物、酮、烯烃和卤代烃。

Emission Characteristic of VOCs from Biomass Emission Characteristic of VOCs from Biomass Molding Fuel Combustion

The emission characteristic of VOCs from biomass molding fuel combustion was studied. VOCs emission factor and the components of flue gas after combustion from four kinds of biomass shaped fuel, i.e., corn straw, wheat straw, cotton stalk and wood, were analyzed on the biomass combustion experimental platform using the sample collection-GC/MS method. The results showed that the VOCs emission factors of four kinds of biomass molding fuel were 0.447, 1.111, 0.601 and 0.104 g/kg, respectively. The VOCs emission factors of biomass molding fuel were only 50% of the powder burning straw. The main types of VOCs from wood molding fuel combustion emissions were benzene series, halogenated hydrocarbon and ketones. The main kinds of VOCs from straw molding fuel combustion emissions were halogenated hydrocarbon, ketone and benzene series. The benzene content emission factor of total straw produced by lignocellulosic biomass combustion was nearly five times higher than that of VOCs emission proportion coefficient. Biomass molding fuel combustion emitted the most of hydrocarbon and ketone with contents of 49.8% and 36.1%, respectively. The ozone generating potential (O3) of total VOCs emissions from four kinds of biomass molding fuel combustion were 4.792, 25.737, 9.598 and 4.502 g/kg, respectively. The compounds with higher ozone generating potential were benzene, ketone, olefins and halogenated hydrocarbon. The results will provide reference for industry standards built of VOCs emissions from biomass molding fuel combustion.