成果報告書詳細
管理番号20160000000151
タイトル*平成27年度中間年報 バイオマスエネルギー技術研究開発 戦略的次世代バイオマスエネルギー利用技術開発事業(実用化技術開発)原料の生産・調達、ペレット燃料製造の研究開発
公開日2016/6/15
報告書年度2015 - 2015
委託先名トヨタ自動車株式会社 株式会社北川鉄工所
プロジェクト番号P10010
部署名新エネルギー部
和文要約
英文要約Title: Development of a Technology for Raw Material Production, Supply, and Fuel Pellet Production

Supplying low cost and stable biomass fuel with a high energy density and stable quality is essential in the promotion of biomass power generation. Reduction of transportation and storage costs is a priority issue because biomass is obtained from wide areas, has low bulk density, and is seasonal.
Multiple types of agricultural residues and herbaceous plants are cultivated on unused lands in small areas are utilized for the development of biomass production and supply system. Multiple types of biomass are processed using the fuel pellet manufacturing technology, developed in this research project.
Although there are many agriculture residues, it is difficult to utilize them for biomass fuel pellet directly because of their high water content. One drying method for major agriculture residues was developed in 2014, and the efficiency of the method was confirmed at larger scale in 2015. Residues were dried for two or three weeks in dry season with plastic cover at the time of rain or night.
Utilizing unused agricultural residues as materials for biofuel has a merit because it does not compete with food production, but there are also disadvantages such as its limited quantity from certain areas. It is possible to reduce collection areas by cultivating high yield herbaceous plants, such as Napier grass, on unused lands in the certain areas. To test the concept, Napier grass was cultivated between the rows of six kinds of trees. The dry yield of Napier grass was 30-70t /ha in the second year.
Certain kind of agricultural residues need coarse crushing before pelletizing. It is necessary to optimize the crushing size because the load of pelleting machine increases if the materials’ crushing size is too large. A coarse crusher was introduced to the actual site of processing, Indonesia, and tested along with the pelletizer.
Some types of pelletizer dice were tested to mold pellets from several kinds of materials. Relationship between the molding speed and load power (kW) was different among the lengths of holes in the dice.
Pellet production facility with loading facility was relocated to the actual place, and tested to establish the production condition of pellets from several materials. Relative density of the pellets and stability of electric current was related to shape of roller grooves. Production speed was over 1.2 t / hour, and electric energy consumption was almost 85kWh.
Pellets made from Napier grass were tested by mill and burner for co-combustion in coal fired boiler. Grain size after milling was almost same with other type of pellets. Stable combustion of grain after milling was confirmed by burner. Impurity of Napier grass pellets was reduced by selection of plant part and pretreatment.
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