Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, 84 Gungjuan Rd., Taishan, Taipei 243, Taiwan, ROC.
Waste Manag. 2012 Mar;32(3):417-25. doi: 10.1016/j.wasman.2011.10.033. Epub 2011 Nov 25.
This study investigates the effects of the bed material size distribution, the operating conditions and the agglomeration/defluidization phenomenon on the heavy metal pollutant emissions in the combustion process. After defluidization, the emission concentration of heavy metals increased, because Na may form a low melting eutectic material that enhances bed material adherence. The emission of Cd increased when the feed simulated urban residues contained sodium; however, the presence of Na had no significant effect on the emission of Cr. Furthermore, the Cd emission concentration was low when the material had a Gaussian distribution; however, the decreases in the Cd emission when the bed material had narrow, binary or flat distributions were not significant. The heavy metal Cr showed the same trend. In addition to the operating parameters, the bed material size distribution may influence the heavy metal emissions during combustion processes.
本研究考察了床料粒度分布、操作条件和团聚/流化现象对燃烧过程中重金属污染物排放的影响。流化后，重金属的排放浓度增加，因为钠可能形成低熔点共晶物质，增强床料的附着。当进料模拟城市废物中含有钠时，镉的排放增加；然而，钠的存在对铬的排放没有显著影响。此外，当物料呈高斯分布时，镉的排放浓度较低；然而，当床料呈窄、二元或扁平分布时，镉的排放减少并不显著。重金属铬也呈现出相同的趋势。除了操作参数外，床料粒度分布也可能影响燃烧过程中的重金属排放。
