Coal Dust Explosion Studies on Closed Room by Numerical Emulation Technique

In recent years, dust explosion is occurred more and more in Chinese coal industry and the loss is enormous. However, to prevent coal dust explosion, coal dust explosion powerful and characteristics must be determined at first, but the studies has less about coal dust explosion. ZhunGeer coal washery was used for research establishment. Using numerical emulation technique, the coal dust particle movement law in the guide-chute was simulated. Gas-solid two-phase flow theory was used to analyze the experimental result. Combined with the actual test data, the coal dust concentration distribution in the guide-chute was gained. Adopting concentration analysis method, hazard of coal dust explosion in the guide-chute was analyzed. Conclusions are drawn that dust removal equipment in the coal washery is safe and reliable and the coal dust in the guide-chute does not have the risk of explosion. The conclusions provide useful theoretical and practical reference for coal dust explosion hazard analysis.