ロータリーキルンを用いたバイオマスガス化システムの現状と展望(<特集>バイオマスガス化技術の現状と展望)

概要

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We developed a biomass gasification and power generation system with rotary kiln. Rotary kiln is suitable for a small scale distributed power source because rotary kiln can handle a relatively wide range of biomass; kind, size, moisture and so on. Our rotary kiln is a multi-cylindrical kiln of external heating type. Biomass materials are indirectly heated and gasified in rotary kiln. Because of indirect heating without air supply, higher calorie gas is generated. The pyrolysis gas is partially oxidized in a gas reforming reactor and further thermally decomposed with its own heat in the atmosphere at a temperature as high as 1100℃. High temperature thermal decomposition causes tar decomposition and soot generation. Outlet gas of gas reformer is provided to filter and dusts in the gas are eliminated. Rotary kiln is heated by hot gas which generates by char and dust combustion. Therefore, this gasification system can run without fossil fuel. We performed demonstration among about 5 years and established a biomass gasification and co-generation system which biomass converts electricity and heat (steam and hot water). We installed 2 commercial plants and now 1 plant is under construction which is built for disposal of rubbles generated by earthquake disaster.
2012-10-20