流動層石灰焼成炉の開発

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タイトル別名
  • Development of a Fluidized-Bed Limestone Calciner.
  • リュウドウソウ セッカイ ショウセイロ ノ カイハツ

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抄録

Many layouts have been used for limestone calcining, such as preheating of limestone and combustion air, precalcination of limestone and heat recovery from combustion gas and quicklime produced. To obtain an optimum system, we focused on fuel consumption, calcination efficiency and prevention of coating trouble in a preliminary study, resulting in a system consisting of precalcination of limestone using a fluidized bed and subsequent fluidized-bed calciner.<BR>A commercial-scale plant with capacity of 50t/d for CaO was designed and constructed. Both the degree of pulverizing and entrainment depends on properties of the raw material limestone. Therefore, by controlling the ratio of fuel consumption between the freeboard and fluidized bed, both conversion over 96% and calcination efficiency over 98% were successfully achieved.

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