Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (9): 57-62.doi: 10.3969/j.issn.1000-565X.2010.09.011

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Numerical Simulation of Dilution Water Applied to Headbox with Perforated Rolls

Kang Guo-bing  Chen Ke-fu  Liu Jian-an  Li Jun   

  1. State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-12-31 Revised:2010-04-10 Online:2010-09-25 Published:2010-09-25
  • Contact: 李军（1972-），男，副教授，主要从事现代制浆造纸关键技术与装备研究．E-mail：ppjunli@scut．edu．cn E-mail:kanggb@sina．com
  • About author:康国兵（1976-），男，博士生，主要从事现代高速纸机技术与装备研究．
  • Supported by:

    国家“十一五”科技支撑计划项目（2007BAF25B01）; 华南理工大学中央高校基本科研业务费专项资金资助项目（2009ZM0085）

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Abstract:

In order to determine whether dilution water can be used to adjust the weight deviation in cross direction when it is applied to the headbox with perforated rolls,the flow field in the headbox is numerically simulated with the CFD software Fluent.Then,the mixing of two kinds of liquid in the headbox is analyzed by using the Multiphase-Mixture model,and the effects of rotating zone on the flow field are discussed via the rotating reference frame（RRF） approach.Finally,the adjustment effect of dilution water at variable inlet speed and rotation speed of perforated rolls is evaluated.Simulated results show that the adjustment effect of dilution water is linear with the rotation speed of perforated rolls.Experimental results indicate that the addition of dilution water helps to decrease the deviation of the basic weight in cross direction by more than 3 points of percentage.The accordance between the experimental results and the simulated ones proves the applicability of dilution water in the headbox with perforated rolls.

Key words: numerical simulation, headbox, dilution, perforated roll, weight adjustment in cross direction