Scale Formation Dynamics on Cooling Surface during Start-Up Operation in Melt Crystallization
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概要
- 論文の詳細を見る
In industrial cooling crystallization, knowledge of scale formation is important because this phenomenon becomes a cause of decreased heat exchange coefficient and productivity loss. However, only a few studies investigating the dynamic change of scale formation have been reported. The present study focuses on crystallization and scale formation dynamics which occur during the cooling operation at the start-up of melt crystallization. Methacrylic acid containing 5 wt% of MeOH was linearly cooled with a cooling coil and the crystallization phenomenon was observed dynamically. During crystallization, five crystallization processes were newly observed: (i) nucleation in melt bulk, (ii) rapid formation of bulky scale on the surface, (iii) temperature increase and loss/disappearance of suspension crystals, (iv) dissolution of bulky scale, and (v) growth of dense layer scale. Since dynamic scale formation in the initial stage of start-up operation became clear, it is expected that these results will be useful for designing the start-up operation.
- Society of Chemical Engineers, Japanの論文
- 2012-07-01
著者
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TAKIYAMA HIROSHI
Department of Chemical Engineering, Tokyo University of Agriculture and Technology
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Takiyama Hiroshi
Graduate School Of Bio-applications And Systems Engineering Tokyo University Of Agriculture And Tech
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Takiyama Hiroshi
Graduate School Of Bio-application And Systems Engineering (base) Tokyo University Of Agriculture An
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Takiyama Hiroshi
Department Of Chemical Engineering Tokyo University Of Agriculture And Technology
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Hino Tomomichi
Productin Technology Laboratories Mitsubishi Rayon Co. Ltd.
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Kudo Shoji
Graduate School Of Bio-applications And Systems Engineering Tokyo University Of Agriculture And Technology
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