组合式粗粉分离器气-固两相流的研究

吉林大学学报(工学版) ›› 2004, Vol. ›› Issue (2): 207-211.

组合式粗粉分离器气-固两相流的研究

张锐¹, 杨善让², 刘巽俊¹

1. 吉林大学, 汽车工程学院, 吉林, 长春, 130022;
2. 东北电力学院, 动力系, 吉林省, 吉林市, 132012

收稿日期:2003-10-14 出版日期:2004-04-01
通讯作者: 刘巽俊(1935- ),男,博士生导师.E-mail:lablxj@jlu.edu.cn

Researth of gas-solid two-phase flow in coarse coal powder separator

ZHANG Rui¹, YANG Shan-rang², LIU Xun-jun¹

1. College of Automotive Engineering, Jilin University, Changchun 130022, China;
2. Dept of Dynamics, Northeast China Constitute of Electric Power Engineering, Jilin 132012, China

Received:2003-10-14 Online:2004-04-01

摘要/Abstract

摘要： 将浑江发电厂3号锅炉的原有粗粉分离器改造成新型组合式粗粉分离器。具体做法为:去掉原径向挡板,在内外筒体间新安装36片轴向挡板,下部安装两级惯性挡板,每级8片,以提高煤粉流场的均匀性和粗粉分离器的效率。用计算流体力学并结合多种多相流动理论^[1],对气固两相流体进行了研究,获得了不同条件下粗粉分离器的参数变化,并进行了现场实验。结果表明:改造后的粗粉分离器的效率提高了20%,阻力下降了500Pa。按每台锅炉年运行6000h计算,1台锅炉年节电1.8×10⁶kW·h,约合45万元人民币。

关键词: 粗粉分离器, 气-固两相流, 分离效率, 流动阻力

Abstract: The coarse coal powder separator of the coal supply system of Hunjiang power plant boiler No.3 was modified improve the separating efficiency and reduce the flow resistance. The modification was summarized as: at the upper part, 36 slices of barriers were added in stead of original radial barriers; at the lower part, two rows of inertial separating plank (8 slices per row) were added.The gas-solid two-phase flow simulation by means of CFD software FLUENT6.0 was performed for original construction and modified one. The flow field, the powder volume fraction distribution and the pressure field were simulated. Numerical simulation was verified by in-situ test data and the results show that the separator construction modification is successful: the separating efficiency increases by more than 20%,the flow resistance reduces by about 500 Pa.Taking the No.3 boiler as an example, if the boiler works 6000h per year, the electricity of 1.8 million kW·h can be saved,that is equivalent to 450000 RMB.

Key words: coarse coal power separator, gas-solid two-phase flow, separating efficiency, flow resistance

中图分类号:

TK123

张锐, 杨善让, 刘巽俊. 组合式粗粉分离器气-固两相流的研究[J]. 吉林大学学报(工学版), 2004, (2): 207-211.

ZHANG Rui, YANG Shan-rang, LIU Xun-jun. Researth of gas-solid two-phase flow in coarse coal powder separator[J]. 吉林大学学报(工学版), 2004, (2): 207-211.

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