FUNDAMENTAL STUDY OF THE BEHAVIOR OF CHLORINE DURING THE COMBUSTION OF SINGLE RDF

摘要

A fundamental study of the combustion characteristics and the de-HCl behavior of a single RDF pellet wasrncarried out to explain the de-HCl phenomena of RDF during fluidized bed combustion and provide data for therndevelopment of high efficient power generation technology using RDF. In this research work, combustion andrnpyrolysis experiments were carried out in an electrical furnace burning a series of simulated and actual RDF samples.rnThe de-HCl capability of Ca (OH)2 in RDF was evaluated by measuring the emission fraction of HCl in thernflue gas and the capture fraction of Cl by the residue. It was found that the capture fraction of Cl components in thernresidue increased from 0 to near 70% when the molar ratio of Ca/Cl was changed from 0 to about 13. It was alsornfound that the capture fraction apparently decreased with increasing the oxygen concentration in the feed gas. Therndevolatilization process of RDF was confirmed to be a very important part of de-HCl process. The effect of temperaturernin the RDF pellet, which varied with the heating rate of RDF and the oxygen concentration in the vicinityrnof the sample, on the de-HCl process was discussed.