摘要
煤矿采煤过程中会产生大量的粉尘,二次负压降尘器是一种通过高速喷射水雾,利用水雾活塞原理,形成负压,并达到卷吸粉尘净化的高效降尘装置。笔者基于流体力学理论,利用计算流体动力学软件FLUENT,对二次负压喷雾器进行了数值模拟仿真分析,得出了出口压力与渐扩管扩散角度的关系;扩散管长度一定时,随着扩散半角从0°增加到70°,出口端面处的负压由中心向边缘逐渐减弱,转换为由中心向边缘逐渐增强,而边缘处的负压越强,越有利于卷吸周围的粉尘。
Plenty of dust generate during coal mining process in the colliery, the secondary negative-pressure dust remover is an effective dust suppression device. It applies water spray piston principle to generate negative pressure via high-speed jet atomization, so as to entrainment and purify dust. In the paper, based on fluid mechanics theory, FLUENT was applied to conduct numerical simulation on a secondary negative-pressure dust remover, and the relationship between the outlet pressure and the diffusing angle of the diffusion tube was obtained： at the same length of the diffusion tube, with the half diffusing angle increasing from 0°to 70°, the negative pressure on the end surface of the outlet transformed from gradual reduction from the center to the edge into gradual enhancement from the center to the edge; the stronger the negative pressure at the edge was, the more dust was entrained away.
出处
《矿山机械》
2015年第10期121-125,共5页
Mining & Processing Equipment
基金
国家自然基金联合基金项目(U1261107)
中北大学第十一届研究生科技立项(20141114)
关键词
负压降尘
煤尘
FLUENT仿真
压力分布
negative-pressure dust suppression
coal dust
FLUENT simulation
pressure distribution
作者简介
王欣东，男，1989年生，硕士研究生，主要从事煤矿喷雾降尘方面的研究工作。
