228 次世代ストーカ炉[酸素リッチ燃焼システム]の開発

抄録

We developed the advanced stoker-type MSW incineration system that is characterized by oxygen-enriched combustion and bottom ash recirculation. The concept of this system is reduction of dioxins concentration in exhaust gas and improvement of bottom ash quality due to high temperature combustion using oxygen-enrichment and bottom ash recirculation. The demonstration tests were carried out for about 40days continuous operation using our small-scale test plant (300kg/h, RDF). And we have successfully optimized the combustion condition for minimizing dioxins concentration at furnace exit (0.1-0.2ng-TEQ/m^3_N) and confirmed the opssibility of improvement of bottom ash quality using bottom ash recirculation instead of using ash melting furnace.