成果報告書詳細
管理番号20130000000228
タイトル*平成22年度中間年報 新エネルギーベンチャー技術革新事業 新エネルギーベンチャー技術革新事業(バイオマス) 超高温常圧水蒸気を用いたバイオマス廃棄物の高効率ガス化技術によるコジェネシステム開発
公開日2013/6/22
報告書年度2010 - 2010
委託先名日本ファーネス株式会社 国立大学法人名古屋大学
プロジェクト番号P10020
部署名技術開発推進部
和文要約
英文要約Title: New Energy Venture Business Technology Innovation Program / New Energy Venture Business Innovation Program (Biomass) /Development of CHP (Combined Heat and Power) system by gasifying biomass wastes with use of super high temperature normal pressure steam process(FY2010-FY2011) FY2010 Annual Report.

Innovative and practical technical development is intended by gasifying biomass wastes for achieving power generation with use of super high temperature normal pressure steam process. Compact and dispersion treatment type system was taken up so that it will be economically feasible as well as it can be spread widely in the country. 1,000oC or higher normal pressure steam was adopted for the gasifier that can reform pyrolysis gases to lower hydrocarbon gases. In this process, tar is hardly produced and high calorific syngas is obtainable. Pyrolysis and reforming processes proceed simultaneously which enables the gasification process simpler and smaller. Tests with Drop Tube Furnace (DTF), Thermogravimetory (TG) were conducted and calculation with numerical model (DARS) was adopted in basic research. As a result, carbon conversion rate increased by about 5 times when the reaction temperature changed from 640oC to 820oC. Tests with TG indicated the increase of gasification rate by 7 times when the steam temperature increased from 800oC to 1,000oC. With use of DARS, the gasifying reaction was simulated for verification of experimental data. The results agree with measured values of TG by calibrating the reaction rate constant. Meanwhile power generation unit was investigated as a compatible combined heat and power (CHP) system. The size of expected system and the expected plant cost was studied. Light oil supported diesel engine power generator is considered to achieve stabilization of the performance against the fluctuation of syngas calorific value. According to the experience of power generator supplier as our joint partner, the power conversion efficiency will be 30% as an achievable value. About 45 - 50 million yen is estimated for the CHP inclusive subsystems and accessories, but further cost saving can be achieved on our system against the other ordinary gasification systems which are already in market.A lumber mill factory is taken up in this study, the owner of which has about 50ha wide forests, he can collect thin out trees and waste lumbers for gasification for about 2,500m3/year. Accordingly 100kg/h is suitable value for gasification. Electric and thermal energy can be converted as part of the profit of 18million yen/year, when it is regarded as the selling price of electricity and cost of LP gas. Collection cost of thin out or cut down trees can be reduced to the level for sustainable business. The depreciation cost and raw material cost is deducted from 18million yen, then the balance is 7.5million yen/year. This value is reasonable cost for operation. Thermal energy from hot water can be used for drying lumbers and wood chips in a cascade manner. 125kW is required for drying fresh lumbers and 168kW of hot water is produced from the CHP so it is more than enough for drying lumbers. Drying process can be adopted for increasing the quality of lumbers and enhancing its productivity. Thus this CHP will be able to make profit.
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