論文
微粉炭燃焼時に発生する石炭灰粒子径に及ぼす影響因子の検討
2016 年 53 巻 7 号 p. 428-435
詳細
2016 年 53 巻 7 号 p. 428-435
In order to expand the application of coal ash from coal-fired power plants, both controlling the ash characteristics and supplying coal ash, meeting the requirements for the specified application, are required. Since fly ash diameter particularly affects ash properties, influence factor of ash diameter distribution are investigated by performing CCSEM measurement and a detailed ash formation model for coal ash from both a pulverized coal combustion test furnace and actual coal-fired power plants. Results show that ash diameter is strongly affected by pulverized coal diameter and ash content. CCSEM measurement shows that the effect of coalescence of included mineral is larger than that of fragmentation of excluded mineral. Model calculation shows that the coalescence parameter varied depending on coal type. However, the coalescence parameter for all coal type tends to approach 1.0 by taking into account the generation of clinker ash. This result indicates that almost all include mineral in a single coal particle tend to become single ash particle as well as coal ash generated in actual coal-fired power plants.
