Analysis for the Sieve Structure of Pulp Pressure Screen Based on CFD
Rippled type drum is the mainly kind of pressure screen drum for papermaking,which is also called bar screen drum and composed with lots of bars fixed by solid rings.Recently,the investigation of pressure screen drum is focused on the shape of ripple,ignoring the influence on pressure screen drum of other parts of the bars.The aim of this paper is to investigate the influence on pressure screen drum of length and width for one specific model bar.CFD(Computational Fluid Dynamics)is used to simulate the different size models by Realizable k-ε model,then the speed of the pulp flow from sieve seam,the pressure difference between internal and external of screen drum,and the changes of turbulence intensity around the sieve seam are analyzed.The changes of the length and width of the bar cause obvious influence on the pressure difference between internal and external of screen drum and the turbulence intensity around the sieve seam.By simulation,an optimal length and width of sieve is found,increasing the effect of backwashing and the smallest changes of turbulence intensity,reducing the resistance of the pulp out of the screen.
CFD Pressure screen Pressure screen drum Sieve
Rong xueqing Shi yanbin Zhang lili
Qilu University of Technology,Jinan City,Shandong Province,China
国际会议
第十七届国际制造会议(The 17th International Manufacturing Conference in China)(IMCC 2017))
深圳
英文
1-6
2017-11-23（万方平台首次上网日期，不代表论文的发表时间）