Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (3): 81-84,99.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Fluidization Investigation and CFD Simulation of Medium-Consistency Pulp Suspensions

Chen Qi-feng  Chen Guang-xue  Chen Ke-fu   

  1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-03-24 Revised:2008-04-30 Online:2009-03-25 Published:2009-03-25
  • Contact: 陈奇峰（1976-），男，博士，讲师，主要从事印刷材料适性与图文信息处理等方面的研究． E-mail:qfchen@scutedu．cn
  • About author:陈奇峰（1976-），男，博士，讲师，主要从事印刷材料适性与图文信息处理等方面的研究．
  • Supported by:

    华南理工大学制浆造纸工程国家重点实验室开放基金资助项目（200742）;华南理工大学传热强化与过程节能教育部重点实验室开放基金资助项目（KF0705）;华南理工大学亚热带建筑科学国家重点实验室开放基金资助项目（B11E4060290）

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Abstract:

High shear stress is employed to fluidize medium-consistency （MC） pulp suspensions, and the corre- sponding fluidization motion is investigated. The results indicate that the energy in the fluidization process dissipates in the form of heat, which may result in the temperature rising of pulp suspensions, that the fluidization of MC pulp suspensions exhibits turbulent flow of smaller floes, possessing the dynamic characteristics of Newtonian fluid, and that there exists dynamic coupling and balancing between the floeculation and dispersion of fibers. A CFD simulation of the fluidization process of MC pulp suspensions is finally performed based on the Eulerian multiphase flow model and the Reynolds time average-based hybrid turbulent model. The simulated results accord well with the experimental ones.

Key words: medium-consistency pulp suspension, fluidization, CFD simulation