Formation of Submicron Particulates (PM1) from the Oxygen-Enriched Combustion of Dried Sewage Sludge and Their Properties
Formation of Submicron Particulates (PM1) from the Oxygen-Enriched Combustion of Dried Sewage Sludge and Their Properties
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DOI：
10.1021/ef060024c
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发表时间：
2007
期刊：
影响因子：
5.3
通讯作者：
Lian Zhang;M. Masui;Hiroharu Mizukoshi;Y. Ninomiya;Chikao Kanaoka
中科院分区：
文献类型：
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作者：
Lian Zhang;M. Masui;Hiroharu Mizukoshi;Y. Ninomiya;Chikao Kanaoka
将干燥后的污泥粉碎后在富氧气氛中燃烧，研究了污泥中小于1.0 μm颗粒物（PM1）的排放特性。燃烧在1200 °C下在下降管式炉中进行，其中在气体气氛中氧含量从10%变化至30%和50%。收集的PM1的特征在于，包括其浓度，粒度分布，以及元素组成和化学物种的尺寸依赖性。结果表明，污泥完全燃烧后，生成的PM1约占总灰分的1. 7%。一般来说，由于焦炭颗粒温度的提高及其破碎，PM 1的量随氧含量的增加呈指数增加。就PM1的形成机制而言，其中的难熔元素，包括Si、Al、Ca、Fe和Mg，经历了两个阶段。
The dried sewage sludges were pulverized and combusted in an oxygen-enriched atmosphere to investigate the emission of particulate matter smaller than 1.0 μm (PM1). Combustions were conducted at 1200 °C in a drop tube furnace with the oxygen content varying from 10% to 30% and 50% in the gas atmosphere. The collected PM1 was characterized including its concentration, particle size distribution, and the size-dependence of the elemental composition and chemical species. The results indicate that, after the complete combustion of sludges, the PM1 formed accounts for about 1∼7% on the basis of total ash, which is influenced significantly by the oxygen content in the gas atmosphere as well as the sludge type. In general, because of the improvement on the temperature of char particles and their breakage, the amount of PM1 is increased exponentially with the increasing of the oxygen content. With regard to PM1 formation mechanisms, the refractory elements within it, including Si, Al, Ca, Fe, and Mg, undergo two ...