竖直涡旋向对卧轮式分级机流场及性能影响

doi:10.16085/j.issn.1000-6613.2017.06.011

化工进展 ›› 2017, Vol. 36 ›› Issue (06): 2045-2050.DOI: 10.16085/j.issn.1000-6613.2017.06.011

竖直涡旋向对卧轮式分级机流场及性能影响

孙占朋¹, 孙国刚², 杨晓楠¹, 颜深¹

1 中国石油大学(北京)化学工程学院, 北京 102249;
2 中国石油大学(北京)过程流体过滤与分离技术北京市重点实验室, 北京 102249

收稿日期:2016-11-04 修回日期:2016-11-24 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: 孙国刚
作者简介:孙占朋(1989—),男,博士研究生,研究方向为颗粒分级和气固分离技术。E-mail:zhanpengsunbj@126.com。
基金资助:
国家自然科学基金（21276274）及国家重点基础研究计划（2014CB744304）项目。

Effect of vertical vortex direction on flow field and performance of horizontal turbo air classifier

SUN Zhanpeng¹, SUN Guogang², YANG Xiaonan¹, YAN Shen¹

1 School of Chemical Engineering, China University of Petroleum, Beijing 102249, China;
2 Beijing Key Laboratory of Process Fluid Filtration and Separation, China University of Petroleum, Beijing 102249, China

Received:2016-11-04 Revised:2016-11-24 Online:2017-06-05 Published:2017-06-05

摘要/Abstract

摘要： 采用数值模拟方法对卧轮式分级机内气相流动特性进行了研究，重点考察了竖直涡旋向对分级机内全流场的影响。模拟结果表明，分级机锥体段以旋转上升的竖直涡为主流型，竖直涡旋向对分级室内流型有重要影响。根据右手定则，竖直涡旋向与转笼旋向满足象限Ⅰ和Ⅲ时，分级室内形成两股旋向相反的水平涡，局部出现二次涡流，转笼外缘气流切向速度接近为0；竖直涡旋向与转笼旋向满足象限Ⅱ或Ⅳ时，分级室内流场分布一致性较好，转笼外缘及叶片间速度分布比较均匀且波动较小。以流化催化裂化（FCC）催化剂为分级物料，处于象限Ⅳ的分级机其分级粒径平均减少5.3μm，分级精度平均提高7.5%；以粉煤灰为物料，分级粒径平均减少2.2μm，分级精度平均提高8.4%，粉料分级试验结果与数值模拟结果吻合。研究结果对卧轮式分级机的结构设计有一定指导作用。

关键词: 粉体技术, 卧轮式分级机, 数值模拟, 竖直涡旋向, 流场特性, 粒度分布

Abstract: Flow field characteristics in horizontal turbo air classifier were investigated by numerical simulation. Effects of swirling direction of the vertical vortex were taken into account. The simulated results showed that,an upwind vertical vortex is the dominant flow in conical part of the classifier,and the vertical vortex direction has a significant influence on flow pattern inside the classifying chamber. By controlling the vertical vortex direction,the flow field distribution can be greatly improved. For the classifiers in quadrant P or IV according to the right-hand rule,the flow field inside the classifying chamber was evenly distributed. Cut sizes of the classifier are decreased by 5.3μm for FCC catalysts and 2.2μm for fly ash while the classification accuracies are increased by 7.5% and 8.4%,respectively. The powder classification experiments well validate the simulation results. Those results could provide guidance to the design of horizontal turbo air classifier.

Key words: powder technology, horizontal turbo air classifier, numerical simulation, vertical vortex direction, flow field characteristics, particle size distribution

中图分类号:

TQ051.8

孙占朋, 孙国刚, 杨晓楠, 颜深. 竖直涡旋向对卧轮式分级机流场及性能影响[J]. 化工进展, 2017, 36(06): 2045-2050.

SUN Zhanpeng, SUN Guogang, YANG Xiaonan, YAN Shen. Effect of vertical vortex direction on flow field and performance of horizontal turbo air classifier[J]. Chemical Industry and Engineering Progress, 2017, 36(06): 2045-2050.

参考文献

[1] SHAPIRO M,GALPERIN V.Air classification of solid particles: a review[J].Chemical Engineering and Processing,2005,44(2):279-285.
[2] XU N,LI G,HUANG Z.Numerical simulation of particle motion in turbo classifier[J].China Particuology,2005,3(5):275-278.
[3] 党栋,王克俭.分级轮转速对粒径分布的影响[J].中国粉体技术,2016,22(2):82-85. DANG D,WANG K J.Effect of classifier wheel speed on particle size distribution[J].China Powder Science and Technology,2016,22(2):82-85.
[4] 党栋,王克俭.加料速度对分级机内部流场的影响[J].化工学报,2015,66(s1):159-164. DANG D,WANG K J.Effect of feeding rate on flow field inside classifier[J].Journal of Chemical Industry and Engineering(China),2015,66(s1):159-164.
[5] TONEVA P,EPPLE P,BREUER M,et al.Grinding in an air classifier mill—Part I:Characterisation of the one-phase flow[J].Powder Technology,2011,211(1):19-27.
[6] TONEVA P,WIRTH K E,PEUKERT W.Grinding in an air classifier mill—Part II:Characterisation of the two-phase flow[J].Powder Technology,2011,211(1):28-37.
[7] 蒋士忠,葛晓陵,王家贤.卧式涡轮分级机气流场研究[J].非金属矿,1999,22(3):35-37. JIANG S Z,GE X L,WANG J X.Study of flow field in a horizontal turbo classifier[J].Non-Metallic Mines,1999,22(3):35-37.
[8] WANG X,GE X,ZHAO X,et al.Study on horizontal turbine classification[J].Powder Technology,1999,102(2):166-170.
[9] 刘丹,宋扬.FJJ型涡流分级机导流盘结构的试验研究[J].硫磷设计与粉体工程,2012,111(6):13-15. LIU D,SONG Y.Experimental study of guide disc structure of FJJ model vortex classifier[J].Sulphur Phosphorus & Bulk Materials Handling Related Engineering,2012,111(6):13-15.
[10] 孙占朋,孙国刚,许杰.挡板对卧轮式气流选粉机性能的影响[J].中国粉体技术,2016,22(1):6-10. SUN Z P,SUN G G,XU J.Effect of deflector on classification performance of horizontal turbo classifier[J].China Powder Science And Technology,2016,22(1):6-10.
[11] BAUDER A,MÜLLER F,POLKE R.Investigations concerning the separation mechanism in deflector wheel classifiers[J].International Journal of Mineral Processing,2004,74:S147-S154.
[12] REN W J,LIU J X,YU Y.Design of a rotor cage with non-radial arc blades for turbo air classifiers[J].Powder Technology,2016,292:46-53.
[13] 岳大鑫,刁雄,李双跃,等.基于颗粒轨迹分析的分级机切割粒径计算[J].化工进展,2012,31(9):1919-1925. YUE D X,DIAO X,LI S Y,et al.Computation of classifier cut size based on analysis of particle tracks[J].Chemical Industry and Engineering Progress,2012,31(9):1919-1925.
[14] 童聪,李双跃,李翔.选粉机颗粒轨迹的非稳态模拟[J].化工进展,2013,32(9):2061-2067. TONG C,LI S Y,LI X.Numerical simulation on particles classification trajectory using unsteady tracking[J].Chemical Industry and Engineering Progress,2013,32(9):2061-2067.

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竖直涡旋向对卧轮式分级机流场及性能影响

Effect of vertical vortex direction on flow field and performance of horizontal turbo air classifier

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