Theoretical and numerical analysis of coal dust separated by centrifugal force for working and heading faces

Shiqiang Chen,Yiqun Li,Xiaowei Zhang,Haijiao Cui,Haiqiao Wang,Jie Zhao

doi:10.1007/s40789-014-0039-9

Abstract

In order to meet engineering needs of Chinese underground coal mines, a new dust-collecting fan, a device of dust separated by centrifugal force in driven cyclone passageway (DCCP) was designed. In centrifugal dust removal section (CDRS) of DCCP, a general equation is derived from the principle of force equilibrium. According to CDRS structure parameters and fan running parameters, the general equation is simplified, and the simplest equation is calculated numerically by MATLAB. The calculation results illustrate that increasing quantity of air current is against dust removal, but it is beneficial to dust removal by increasing the radius of driven spiral blade and increasing the particle diameter of coal dust. The conclusions show that the dust-collecting structure parameters coupled with the fan running parameters is a novel optimization approach to dust-collection fan for working and heading faces, which is especially suitable for Chinese underground mines.

Highlights

It was known that overexposure to airborne respirable dust will cause disabling or fatal respiratory disease, and health problems of coal dust have been an ongoing occupational health concern
In order to meet engineering needs of Chinese underground coal mines, a new dust-collecting fan, a device of dust separated by centrifugal force in driven cyclone passageway (DCCP) was designed
In centrifugal dust removal section (CDRS) of DCCP, a general equation is derived from the principle of force equilibrium

Summary

Introduction

It was known that overexposure to airborne respirable dust will cause disabling or fatal respiratory disease, and health problems of coal dust have been an ongoing occupational health concern. As far as Chinese coal mines, it was reported that there was over 2.65 million workers exposure to dust and the pneumoconiosis detection percentage was up to 7.2 %, and the number of accumulated pneumoconiosis patients had been over 57,000 (Zheng 2011). Zhang School of Mining & Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

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