选煤厂暗道多热源叠加作用对通风排尘特性的影响

doi:10.16265/j.cnki.issn1003-3033.2017.11.026

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (11): 150-156.doi: 10.16265/j.cnki.issn1003-3033.2017.11.026

选煤厂暗道多热源叠加作用对通风排尘特性的影响

陈曦^1,2 讲师, 葛少成¹ 教授, 张兴华¹, 张忠温^1,3, 葛斐¹

1 辽宁工程技术大学安全科学与工程学院,辽宁阜新 12300
2 辽宁工程技术大学安全工程技术研究院,辽宁阜新 123000
3 中煤平朔集团有限公司,山西朔州 036000

收稿日期:2017-07-20 修回日期:2017-09-22 发布日期:2020-10-21
作者简介:陈曦 (1987—),男,辽宁瓦房店人,博士,讲师,主要从事大气污染控制与矿井通风除尘应用研究。E-mail:chenxi615520@126.com。
基金资助:
国家自然科学基金资助(51704145,51274116)。

Analysis of multithermo-sources superimposed effect on ventilation dedusting in coal preparation plant

CHEN Xi^1,2, GE ShaoCHENG¹, ZHANG Xinghua¹, ZHANG Zhongwen^1,3, GE Fei¹

1 College of Safety Science and Engineering, Liaoning Technical University,Fuxin Liaoning 123000,China
2 Research Institute of Safety Engineering and Technology, Liaoning Technical University,Fuxin Liaoning 123000,China
3 China Coal Pingshuo Group Company Limited, Shuozhou Shanxi 036000, China

Received:2017-07-20 Revised:2017-09-22 Published:2020-10-21

摘要/Abstract

摘要： 为探究选煤厂输煤暗道多热源叠加作用对粉尘颗粒瞬态扩散的影响,采用热-流-固三场耦合理论,利用Fluent软件对通风排尘供暖过程中空间温度分布情况和粉尘颗粒瞬态扩散过程进行模拟研究,并在平朔安家岭选煤厂2125暗道进行试验。模拟结果表明:在内部热源辐射散热的影响下,暗道空间内靠近热源区域形成了明显的温度梯度;热泳力加剧了粉尘颗粒沉积效果,粉尘颗粒更易积聚在设备表面或地面,下部区域粉尘质量浓度高达394 mg/m³。现场试验表明:暗道空间各测点温度的模拟值与实测值基本吻合,验证了热-流-固耦合方法分析封闭空间内多污染热源通风供暖排尘过程中热源散热、气流场流动和粉尘颗粒动力场的三场耦合关系是正确的;明确暗道空间粉尘颗粒逸散特征,对提高降尘效果具有重要意义。

关键词: 热-流-固耦合, 温度场, 多热源叠加作用, 温度梯度, 通风排尘

Abstract: In order to explore the influence of multithermo-sources superimposed on dust particles transient diffusion, based on the coupled thermo-hydro-mechanical model, the distribution of space temperature and the dispersion law of dust particles were studied by using Fluent software. Related experimental study was conducted in Anjialing coal preparation plant. The simulation and experimental results indicated that temperature gradient was formed quickly in the high-temperature area under the influence of thermal radiation of internal heat sources. At the same time, the thermophoresis force played a dominant role in dust particles diffusion which resulted in dust accumulation on the surfaces of equipment and ground. The dust concentration was 394 mg/m³. Through comparison of temperature from simulation results and measuring data in the postern, the modeling results have been proven to be reliable. The interrelationship and interreaction of multi-physical coupled fields, which was composed of heating dissipation, airflow field and particles dynamic field in the enclosure space, were verified by the coupled thermo-hydro-mechanical method. The research findings further revealed the dust dispersion characteristics in preparation plant and had important scientific significance in improving the efficiency of dust removal.

Key words: coupled thermo-hydro-mechanical, temperature field, multithermo-sources superimposed, temperature gradient, ventilation dedusting

中图分类号:

X964

陈曦讲师, 葛少成教授, 张兴华, 张忠温, 葛斐. 选煤厂暗道多热源叠加作用对通风排尘特性的影响[J]. 中国安全科学学报, 2017, 27(11): 150-156.

CHEN Xi, GE ShaoCHENG, ZHANG Xinghua, ZHANG Zhongwen, GE Fei. Analysis of multithermo-sources superimposed effect on ventilation dedusting in coal preparation plant[J]. China Safety Science Journal, 2017, 27(11): 150-156.

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选煤厂暗道多热源叠加作用对通风排尘特性的影响

Analysis of multithermo-sources superimposed effect on ventilation dedusting in coal preparation plant

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