Liu G Q, Itaya Y, Yamazaki R, Mori S, Yamaguchi M, Kondoh M
Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Waste Manag. 2001;21(5):427-33. doi: 10.1016/s0956-053x(00)00134-3.
A fundamental study of the combustion characteristics and the de-HCl behavior of a single refuse-derived fuel (RDF) pellet was carried out to explain the de-HCl phenomena of RDF during fluidized bed combustion and to provide data for the development of high efficiency power generation technology using RDF. In this research, combustion and pyrolysis experiments were carried out in an electrical furnace using a series of model and actual RDF samples. The de-HCl capability of Ca(OH)2 in RDF was evaluated by measuring the emission fraction of HCl in the flue gas and the capture fraction of Cl in the residue. It was found that the capture fraction of Cl components in the residue increased from 0 to nearly 70% when the molar ratio of Ca/Cl was changed from 0 to around 13. Apparently, the capture fraction also decreased with increasing oxygen concentration in the feed gas. The devolatilization process of RDF was confirmed to be a very important part of de-HCl process. The effect of temperature profile of the RDF pellet on the de-HCl process, as it varies with the heating rate of RDF and the oxygen concentration in the vicinity of the sample, is discussed.
为了解释垃圾衍生燃料（RDF）在流化床燃烧过程中的脱氯化氢现象，并为开发利用RDF的高效发电技术提供数据，对单个RDF颗粒的燃烧特性和脱氯化氢行为进行了基础研究。在本研究中，使用一系列模型和实际RDF样品在电炉中进行了燃烧和热解实验。通过测量烟气中HCl的排放分数和残渣中Cl的捕获分数来评估RDF中Ca(OH)₂的脱HCl能力。结果发现，当Ca/Cl摩尔比从0变化到约13时，残渣中Cl成分的捕获分数从0增加到近70%。显然，捕获分数也随着进料气体中氧气浓度的增加而降低。RDF的挥发过程被证实是脱HCl过程的一个非常重要的部分。讨论了RDF颗粒的温度分布对脱HCl过程的影响，因为它随RDF的加热速率和样品附近的氧气浓度而变化。
