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|Table of Contents|

基于FLUENT的压力缝筛波纹形状的改进机制(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2012年06期
Page:
105-109
Column:
研究论文
publishdate:
2012-12-05

Article Info:/Info

Title:
Improving mechanism of pressure screen contoured slot shape based on FLUENT
Author(s):
CHEN Yongli ZHANG Jian ZHANG Hui*
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China
Keywords:
pressure screen corrugation FLUENT numerical simulation
Classification number :
TS733+8; TQ019
DOI:
10.3969/j.jssn.1000-2006.2012.06.021
Document Code:
A
Abstract:
In order to turn the pulp in the pressure screen turn into the slot more easily and to improve the screening ability, the vortex near the contoured slot should be reduced or eliminated. The local flow field model of the screen slot was drawn with UG software, and then the flow field model was simulated with FLUENT software. Different improvements of the contoured slot shape were analyzed, and finally the detail distribution contours of the pressure, turbulent kinetic energy and velocity magnitude in the contoured slot field were obtained. The results showed that in the experimental condition the larger the screen slot chamfering angle was, the smoother the fluid flow near the screen slot was. When chamfering angle radius increased to 04 mm, the vortex disappeared. When the chamfering angle radiuses of the contoured slot entrance on both sides were 05 mm, the pulp flow form was the best, the passage ratio was the largest and improved 124 % higher than before.

References

[1]姜海龙,刘梅城,孙垂宝.新型筛选设备外流式中浓压力筛[J].中国造纸,2008,27(5):41-44.
[2]Gooding R W. The passage of fibers through slots in pulp screening[D]. Vancouver: The University of British Columbia, 1986.
[3]杨光誉,陈克复.新型压力筛的结构[J].中国造纸,1997,16(1):58-63.
[4]Wikstrm T, Rasmuson A. Transition modeling of pulp suspensions applied to a pressure screen[J]. Journal of Pulp and Paper Science, 2002,28(11):374-378.
[5]Zeng J S, Chen K F, Chai X S, et al. CFD simulation of dischargers dilutionzone in high consistency bleaching tower[J]. The Canadian Journal of Chemical Engineering, 2011,89(3):475-483.
[5]Gonzalez J A. Characterization of design parameters for a free foil rotor in a pressure screen[D].Vancouver: The University of British Columbia, 2002.
[7]Dong S,Salcudean M, Gartshore I. The effect of slot shape on the performance of a pressure screen[J]. Tappi Journal,2004,3(5):3-7.
[8]Biniaris A. Insight on the effect of contour height in pressure screening[D]. Vancouver: The University of British Columbia, 2008.
[9]mml A. Fractionation of thermomechanical pulp in pressure screening: An experimental study on the classification of fibres with slotted screen plates[D]. Oulu: University of Oulu, 2001.
[10]Dong S. Modeling of fiber motion in pulp and paper equipment[D].Vancouver: The University of British Columbia, 2002.
[11]李海青.两相流参数检测及应用[M].杭州:浙江大学出版社,1991.
[12]Satyanarana V Mokamati. Effect of aperture geometry of the steady flow through the narrow apertures in a pulp screen numerical and experimental study[D].Vancouver: The University of British Columbia, 2007.
[13]孙加龙, 陈克复,朱冬生,等.纸浆流动的数值模拟[J].四川大学学报:自然科学版, 2002, 39(5): 878-882.

Last Update: 2012-11-30