片狀化石燃料的循環流化床燃燒(Ⅰ)——片狀顆粒的形貌描述和流態化阻力特征描述

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基金項目:

國家自然科學基金資助項目(No.50476082)

Combustion behaviour of chip-shaped particles in a circulating fluidized bed boiler(Ⅰ): Discription of particle morphology and characteristics of fluidization quality

1. Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Thermal Power Plant of Haoyu Company, Beijing 100083, China

摘要: 比較了不同球形度概念對片狀化石燃料的描述效果,研究了片狀化石燃料球形度變化對其流態化特征的影響.分析了Krumbein球形度為0.1-0.4的京西無煙煤在一臺50MW循環流化床鍋爐上表現出來的特殊現象,如運行床溫和爐膛壓力大幅度波動、依靠排放冷渣保持穩定運行,揭示了這些現象發生的原因.
- 流化床 /
- 燃燒 /
- 顆粒形貌 /
- 球形度 /
- 形狀因子
Abstract: The effectiveness of classical sphericity and Krumbein sphericity was compared to discribe chip-shaped fossil fuel, and the influence of sphericity on fiuidization characteristics was studied. Some special pheno-mina in a 50 MW circulating fluidized bed boiler using an anthracit with Krumbein sphericities of 0.2-0.4 were discussed such as obvious fluctuations of dense phase temperature and furnace pressure as well as draining cold ash during operation, which can be explained by particle mophology.
- fluidized bed /
- combustion /
- particle morphology /
- sphericity /
- shape index