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

doi:10.16265/j.cnki.issn1003-3033.2017.11.026

Abstract

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

CLC Number:

X964

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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