Experimental study on MSW gasification and melting technology

Abstract

In order to develop municipal solid waste (MSW) gasification and melting technology, two preliminary experiments and a principle integrated experiment were fulfilled respectively. The gasification characteristics of MSW were studied at 500–750°C when equivalence ratio (ER) was 0.2–0.5 using a fluidized-bed gasifier. When temperature was 550–700°C and ER was 0.2–0.4, low heat value (LHV) of syngas reaches 4000–12000 kJ/Nm 3. The melting characteristics of fly ash were investigated at 1100–1460°C using a fixed-bed furnace. It was proved that over 99.9% of dioxins could be decomposed and most heavy-metals could be solidified when temperature was 1100–1300°C. The principle integrated experiment was carried out in a fluidized-bed gasification and swirl-melting system. MSW was gasified efficiently at 550–650°C, swirl-melting furnace maintains at 1200–1300°C stably and over 95% of fly ash could be caught by the swirl-melting furnace. The results provided much practical experience and basic data to develop MSW gasification and melting technology.