Reduction of Bed Agglomeration in CFB Combustion Biomass with Aluminium-Contain Bed Material |
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| Institution: | 1. Department of Environmental Science and Technology, Tokyo Institute of Technology, G5-8, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan;2. Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Rd, Ladyaow Chatuchak, Bangkok 10900, Thailand;3. Istituto di Ricerche sulla Combustione – CNR, P.le V. Tecchio 80, 80125 Napoli, Italy;4. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, P.le V. Tecchio 80, 80125 Napoli, Italy;1. Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China;2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China;3. Department of Thermal Engineering, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China |
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| Abstract: | Two kinds of bed materials were used as bed materials when a biomass of cotton stalk was burnt in a circulation fluidized bed (CFB) combustion pilot plant (0.2 MW). After a long time operation, silica bed materials were found sintered while aluminous bed materials slightly changed. The particles of both kinds of bed materials were sampled and three instrumental approaches were performed (XRF, SEM/EDS, XRD) to identify the bed materials in order to find out the mechanics of agglomeration.The result shows that both of the bed materials were enriched with alkali metals but the changing speed of enrichment of aluminous particles was much slower than that of silica particles. The CFB could go steadily and well at least 72 h under our experimental condition when aluminous particles were used as bed material. Agglomeration of aluminous bed materials was reduced due to the protective element aluminous. |
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