Yasuda Kenji, Takahashi Michimasa
a Kanagawa Environmental Research Center , Hitatsuka City , Japan.
J Air Waste Manag Assoc. 1998 May;48(5):441-447. doi: 10.1080/10473289.1998.10463692.
The emission of polycyclic aromatic hydrocarbons (PAHs) during start-up, burning, and burn-out were determined for four municipal solid waste MSW incinerators. During start-up conditions, PAH concentrations were shown to be high due to unstable combustion. A positive correlation was seen between PAH concentrations and the organic carbon content of the dust. This study was conducted to examine the emission behaviors of PAHs according to furnace type and to measure emissions during the combustion cycle. The organic carbon in the dust, as well as PAH emissions, during three combustion periods were determined for four MSW incinerators. PAHs were high during start-up because of incomplete combustion at low temperature. In the fluid-ized-bed incinerator, PAHs were high because combustion in the fluidized bed, was more unstable than in the step grate. A batch fluidized bed showed particularly higher concentrations compared to a continuous fluidized bed, owing to less stable combustion. Organic carbon in the dust was normally highest during start-up and lowest during burning. Continuous incinerators with longer operation periods showed higher emission rates during burning. This parameter for the batch-type fluidized bed increased during start-up and burn-out.
对四座城市固体废物（MSW）焚烧炉在启动、燃烧和燃尽阶段多环芳烃（PAHs）的排放情况进行了测定。在启动阶段，由于燃烧不稳定，PAH浓度较高。PAH浓度与粉尘中的有机碳含量呈正相关。本研究旨在根据炉型研究PAHs的排放行为，并测量燃烧周期内的排放量。测定了四座MSW焚烧炉在三个燃烧阶段粉尘中的有机碳以及PAH排放量。由于低温下燃烧不完全，启动阶段PAHs含量较高。在流化床焚烧炉中，PAHs含量较高是因为流化床中的燃烧比阶梯炉排中的燃烧更不稳定。与连续流化床相比，间歇式流化床由于燃烧稳定性较差，PAH浓度特别高。粉尘中的有机碳通常在启动阶段最高，在燃烧阶段最低。运行时间较长的连续焚烧炉在燃烧阶段的排放率较高。间歇式流化床的这一参数在启动和燃尽阶段有所增加。
