Experimental investigation and application of dry-type filtering dust collection technology in fully mechanized excavation face
ZHOU Fu-bao
LI Jian-long
LI Shi-hang
WANG Fei
Abstract：The coal mine dust induced an increasing coal miner's pneumoconiosis and serious coal dust explosion.However,the existing wet dust collection technologies are generally inefficient.According to the environmental conditions of fully-mechanized excavation face in coal mine,the main influencing factors of dry-type filtering dust collection technology in fully-mechanized excavation face are water spraying in the air,uniformity of cleaning and cleaning strategy,etc.Therefore,dry-type filtering dust collection experiment system and prototype are built in this study.An experimental study shows that a moderate amount of spray (2 200 mL/min) is beneficial to improve the filtration performance of the dust collection system.The installation of the normal cone and column cone in the filter cartridge can improve the injection flow field.The positive and reverse cleaning mode is more conducive to improve the cleaning effect and reduce the dust emission concentration respectively.A dry-type filtration dust collector KCG-200D is developed and applied in the Gequan coal mine.The total and respirable dust collection efficiencies are 97.39％ and 96.41％ at the scene.
Keywords：fully-mechanized excavation facedry-type dust collectionfilteringwater sprayinguniformity of cleaningcleaning strategy
Publication Date：2017-01-01
Pages：7( 639-645 )