成果報告書詳細
管理番号20130000000606
タイトル*平成23年度中間年報 省エネルギー革新技術開発事業 先導研究 リサイクル炭素繊維の低コスト省エネ再生技術の研究開発
公開日2013/8/22
報告書年度2011 - 2011
委託先名国立大学法人岐阜大学 カーボンファイバーリサイクル工業株式会社
プロジェクト番号P09015
部署名省エネルギー部
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等
本研究開発の目的は長繊維の炭素繊維再生プロセスの省エネルギー性を向上させることであり,プロセスの設計・運転などの最適条件を得るため,小型バッチ試験装置で各種パラメータの詳細データ(伝熱および熱分解速度等のデータ取得と設計計算)の収集を行うとともに,得られた知見を基に長繊維炭素繊維再生の実証試験を行う。また,省エネルギー性と再生炭素繊維品質の両立を図るため,種々の条件で再生した長繊維炭素繊維の材料としての評価試験を行う。主な研究開発項目は(1)炭化炉の省エネの研究,(2)焼成炉の省エネの研究,(3)連続プロセスの研究,(4)再生炭素繊維の評価の4項目である。
英文要約Title: Study of Low Cost and Saving Energy Methods of Carbon Fiber Reinforced Plastic Recycling (FY2010-2012) FY2011 Annual Report

It is expected for carbon fiber reinforced plastic (CFRP) to be used as the composite materials of automobiles and aircrafts to significantly reduce the transportation energy. However, the waste CFRP is at present landfilled because it is difficult to be recycled. From the viewpoint of the development of a sustainable society, the establishment of recycling process of carbon fiber has become an urgent matter. Also, if a resin component in CFRP is used as energy, it can significantly reduce the energy in process for recovering the carbon fiber. In this research, we have preceded the development to establish an excellent energy saving process and the control system to recover the carbon fiber by thoroughly using the plastic component with the CFRP.
In the research for saving energy of carbonizing furnace in FY2011 we investigated the material balance and the energy balance using a small electric furnace and a laboratory-scale carbonizing furnace. As the results, we confirmed that the heat capacity of the product gases and tar after thermally decomposed the resin components can cover the amount of heat required to the CFRP pyrolysis and that the superheated steam can give energy saving of 38% for a small furnace CYT-1700 and of 56% for a large furnace CYT-7000.
In the research for saving energy of oxidizing furnace, we confirmed that the oxidizing condition less than 500°C is appropriate from the view point of the fiber strength. In the large kiln furnace study of the utilization of waste heat from carbonizing furnace and from the residual carbon firing, improvement of heat exchange efficiency of the kiln, the utilization of superheated steam and the increase of density of the carbon fiber in a box, we confirmed to achieve energy saving of 33% and to improve increasing to 48% in stable operation condition.
In the research for a continuous operation, although the heating effect by the extra superheated steam from carbonizing furnace to the kiln was only energy savings of 3-5%, we confirmed that the other effects of adding superheated stem to the carbonizing furnace, improving heat exchange and increasing fiber-filled density in the oxidizing furnace provided a large energy saving of 52% totally.
In the research of the carbon fiber strength tests, we confirmed that the recycled carbon fiber can obtain more than 80 % strength of the treated virgin carbon fiber.
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