Numerical simulation of pulp suspension flow field inside pressure screen based on FLUENT

CHEN Yongli,ZHANG Jian,ZHANG Hui

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2012, Vol. 36 ›› Issue (03) : 105-110.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2012, Vol. 36 ›› Issue (03) : 105-110. DOI: 10.3969/j.jssn.1000-2006.2012.03.022

Numerical simulation of pulp suspension flow field inside pressure screen based on FLUENT

  • CHEN Yongli,ZHANG Jian,ZHANG Hui*
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Abstract

In order to avoid blocking of holes and gaps of the pressure screen in the process of screening waste paper pulp screening, the fluid characteristics such as viscosity of the waste paper pulp with different concentrations were first tested and analyzed; and then the flow field inside pressure screen was drawn with Unigraphics NX software(UG)finally,pulp suspension flow field inside the pressure screen was simulated with computational fluid dynamics(ICEM CFD)and FLUENT software. From the numerical simulation,the detail distribution of the pressure,turbulence intensity and velocity of pulp flow in the screening zone were obtained. The results for the pressure screen used with representative pulp and structure’s characteristics and running parameters showed that the highest turbulence intensity near the corrugated plate was 306% and highest turbulence intensity in the screen holes was 128%; the maximum velocity at the screening holes’ inlet was 8.16 m/s,the maximum velocity at the screening holes’ outlet was 3.5 m/s,and the average was 1.2 m/s; and the biggest static pressure near the screen plate at the head of rotor wing was about 1.8×105 Pa and the minimum static pressure at the end of rotor wing was 6.92×104 Pa.

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CHEN Yongli,ZHANG Jian,ZHANG Hui. Numerical simulation of pulp suspension flow field inside pressure screen based on FLUENT[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2012, 36(03): 105-110 https://doi.org/10.3969/j.jssn.1000-2006.2012.03.022

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