유동층 연소로에서 고체 폐기물 연료의 열분해 및 연소 특성 비교

Abstract

The information on the proceses of volatile combustion and devolatilization is important in designing and oper-ating the combustor of solid waste fuels of which volatile proportion in the combustible is very high. The aims were to com-pare the reactions of the waste fuels having different origin and to sort out their own distinguishable characteristics that areimportant in designing the FBC(fluidized bed combustor). Waste fuels were selected to examine their characteristics of pyrolysisand combustion in a laboratory scale combustor in which a nearly single particle combustion condition was reproduced. Wod,paper sludge, sewage sludge and RDF were selected and the fuel particles whose characteristic lengths were a few centimeterswere injected into a fluidizing environment of 700oC sand in the thermally maintained reactor. By introducing some experimentalparameters such as the rate and the fraction of carbon conversion, the combustion characteristics of the fuels were checked for thetwo separated proceses of devolatilization and char combustion. Additional experimental work was caried out to determine theinfluence of the high water content of sludge fuels on its combustion proces. The comminution effects on the combustion processof the large fuel particle were rechecked by performing the experiments for the wod particles of various size. The meanings of thefuel combustion characteristics in designing of FBC were checked and some design strategies were suggested.