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• Main Authors: Shih-Feng Yang, 楊士鋒
• Other Authors: Wei-Hsing Huang
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/w2955m

碩士 === 國立中央大學 === 土木工程學系 === 107 === A domestic textile mill generates electricity through co-combustion of coal and textile sludge in order to replace coal with biomass industrial waste as fuel. This study, based on the ash produced by the circulating fluidized bed boiler(CFB) in this mill, aims to investigate the material properties of ashes produced by co-firing coal and textile sludge. Two types of fuel materials are selected, they are bituminous coal and a mixture of bituminous coal and textile sludge. To study the stability of fly ash generated from co-combustion, three batches are tested following the current specification. The research material will be compared with the fly ash produced by a boiler in a coal-fired power station. To explore the material properties and construct the baseline data of ash from co-combustion, all research materials undergo tests of both physical and chemical properties. Since CFB adopts different burning parameters and lower burning temperature, and uses limestone as sulfur-scrubbing admixture, research results show that the fly ash produced by CFB is characterized by a high fineness, with the presence of anhydrite and active aluminum. These properties result in a higher pozolanic activity when blended with cement at an early age, but engender an issue of durability. In the experiments on utilization of fly ash as construction materials, results show that adjusting the amount of water will make workability of CLSM and fly ash concrete in accordance with current specification. To consume the fly ash, it could be used in a large amount on CLSM. Since the concrete manufactured using CFB fly ash exhibits poor resistance to sulfur, it is recommended that the use of CFB fly ash be limited to making concrete products.