Multiphase flow simulation of a simplified coal pulveriser

被引：41

作者：

Vuthaluru, HB ^{[1
]}

Pareek, VK ^{[1
]}

Vuthaluru, R ^{[1
]}

机构：

[1] Curtin Univ Technol, Dept Chem Engn, Perth, WA 6001, Australia

来源：

FUEL PROCESSING TECHNOLOGY | 2005年 / 86卷 / 11期

关键词：

pulveriser; turbulent flow; multiphase flow; grid generation; CFD; particle trajectories;

D O I：

10.1016/j.fuproc.2004.12.003

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In coal-fired power plants, the first major component is pulveriser, whose performance dictates the total power station efficiency. Pulveriser is employed to grind the lumped coal and transport the fine coal powder to furnace chamber for an efficient combustion. In this study, we have simulated motion of air and coal particles inside a commercial-scale pulveriser. Multiphase flow simulation of a simplified pulveriser was carried out using a granular Eulerian-Eulerian approach. Due to inclined air-distributor vanes, the flow field within pulveriser was slightly asymmetric. Regions of exceptionally high velocities were predicted close to the outer walls of the pulveriser, indicating a strong probability of particles carryover within these regions. The 100 mu m coal particles qualitatively followed the air path-lines. However, the velocity vectors for 500 mu m particle deviated significantly from those of airflow. The results presented in the paper provide impetus for the development of a complex pulveriser model, which further could prove valuable to designers for optimisation of components within the mill. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1195 / 1205

页数：11

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