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Equal consistency spraying and flow field characteristics of spraying water pipe

Authors

  • Jin-Song Zeng,

    Corresponding author
    1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangdong Province Public Laboratory of Paper Making Technology and Equipment, Guangzhou, China
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  • Ke-Fu Chen,

    1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangdong Province Public Laboratory of Paper Making Technology and Equipment, Guangzhou, China
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  • Yu-Cheng Feng,

    1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangdong Province Public Laboratory of Paper Making Technology and Equipment, Guangzhou, China
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  • Wang Wei,

    1. PERA China, GuangZhou, China
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  • De-Tao Liu

    1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangdong Province Public Laboratory of Paper Making Technology and Equipment, Guangzhou, China
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Abstract

As one of the key parts of discharging system in the diluted zone at the bottom of high consistency bleaching tower, the spraying water pipe would be used to dilute the pulp uniformly while it was rotating, with a range from 0 to 90 rpm. Fluid dynamics of the three kinds of spraying water pipes such as straight-shaped, spindle-shaped and waist-shaped were studied by performing computational fluid dynamics (CFD) simulations and particle image velocimetry (PIV) measurements. Simulated velocity fields were compared with experiment PIV data. The results from the simulations and experiments are in good agreement. The works show that CFD simulations using the Realisable κϵ model combined with the MRF technique can predict the hydrodynamic characteristics in industrial scales spraying water pipes. Spindle-shaped spraying water pipe would be better finished equal consistency spraying water.

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