SCI和EI收录∣中国化工学会会刊

›› 2010, Vol. 18 ›› Issue (2): 239-243.

• • 上一篇    下一篇

Modeling on a Modified Feeding Mode of Simulated Moving Bed for Improving Productivity

危凤1, 沈波1, 陈明杰1, 赵迎宪1, 邵立平2   

  1. 1. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
    2. Zhejiang NHU Company Ltd., Xinchang 312500, China
  • 收稿日期:2009-08-12 修回日期:2009-12-26 出版日期:2010-04-28 发布日期:2010-04-28
  • 通讯作者: WEI Feng,E-mail:weifeng@nit.net.cn
  • 基金资助:
    Supported by the Natural Science Foundation of Ningbo(2009A610153)

Modeling on a Modified Feeding Mode of Simulated Moving Bed for Improving Productivity

WEI Feng1, SHEN Bo1, CHEN Mingjie1, ZHAO Yingxian1, SHAO Liping2   

  1. 1. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
    2. Zhejiang NHU Company Ltd., Xinchang 312500, China
  • Received:2009-08-12 Revised:2009-12-26 Online:2010-04-28 Published:2010-04-28
  • Supported by:
    Supported by the Natural Science Foundation of Ningbo(2009A610153)

摘要: A new feeding mode for a simulated moving bed(SMB) is proposed.The outlet stream from zone Ⅱ is collected at regular intervals.The concentration of the solution is increased by dissolving raw materials and then fed to zone Ⅲ as the feed stream during the next collection interval.In this feeding mode,the concentration of the stream fed to zone Ⅲ is identical to that of original feed,while in a conventional SMB,the feed is diluted by mix-ing with the outlet stream of zone Ⅱ before feeding to zone III.The new feeding mode increases the inlet concentra-tion of zone Ⅲ.A modeling investigation shows that higher inlet concentration of zone Ⅲ increases the height of concentration band in SMB,improving the separation performance significantly.In comparison with the traditonal feeding mode,the new feeding mode increases the productivity by 23.52% and decreases the solvent consumption by 22.56%,so as to increase the raffinate and extract concentrations by 53.17% and 20.38%,respectively.The col-lection interval for the outlet stream from zone Ⅱ has no effect on the separation performance after reaching the steady state,so that the collection interval can be increased to make the operation more convenient.

关键词: simulated moving bed, feeding mode, modified operation, simulation

Abstract: A new feeding mode for a simulated moving bed(SMB) is proposed.The outlet stream from zone Ⅱ is collected at regular intervals.The concentration of the solution is increased by dissolving raw materials and then fed to zone Ⅲ as the feed stream during the next collection interval.In this feeding mode,the concentration of the stream fed to zone Ⅲ is identical to that of original feed,while in a conventional SMB,the feed is diluted by mix-ing with the outlet stream of zone Ⅱ before feeding to zone III.The new feeding mode increases the inlet concentra-tion of zone Ⅲ.A modeling investigation shows that higher inlet concentration of zone Ⅲ increases the height of concentration band in SMB,improving the separation performance significantly.In comparison with the traditonal feeding mode,the new feeding mode increases the productivity by 23.52% and decreases the solvent consumption by 22.56%,so as to increase the raffinate and extract concentrations by 53.17% and 20.38%,respectively.The col-lection interval for the outlet stream from zone Ⅱ has no effect on the separation performance after reaching the steady state,so that the collection interval can be increased to make the operation more convenient.

Key words: simulated moving bed, feeding mode, modified operation, simulation