Highly Efficient Evaporative Crystallization of a High Suspension Density Sodium Chloride Slurry in a Draft-Tube Stirred Vessel in Continuous Operation

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Kazuhiko Nishi¹  Ryuta Misumi¹  Suisei Ibe²  Meguru Kaminoyama¹  Shimpei Kato² 

[1] Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University;Division of Materials Science and Chemical Engineering, Graduate School of Engineering, Yokohama National University

关键词: Solid–Liquid Mixing;    Draft-Tube;    Evaporative Crystallization;    High-Density Suspension;    Continuous Operation;   

DOI  :  10.1252/jcej.10we212

来源: Maruzen Company Ltd

【 摘 要 】

References(7)Cited-By(2)High suspension density slurries generally require high-power stirring, which can introduce a large amount of particle abrasion following particle collisions, and subsequent secondary nucleation. In this study, the influence of stirring operation and suspension density on evaporative crystallization of a high-density suspension of sodium chloride in continuous operation was investigated for an optimally designed draft-tube stirred vessel based on the time evolution of the number of crystals and the particle size distribution. For highly efficient evaporative crystallization in continuous operation, the particle suspension density should be kept high to eliminate excess nucleation with large particle surface areas. The impeller speed should be somewhat higher than the condition at which particles just become completely suspended to prevent particle agglomeration.

【 授权许可】

Unknown