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作 者:唐利刚[1]
机构地区:[1]天地科技股份有限公司开采设计事业部,北京100013
出 处:《煤炭工程》2012年第7期103-105,108,共4页Coal Engineering
基 金:国家自然科学基金创新研究群体项目(50921002);中国博士后科学基金项目(20100480473)
摘 要:为提高干扰流化床对细粒煤的分选性能,文章介绍了一种内构件(截顶倒圆锥形多孔板)的板倾角、板间距、水速对干扰床分选效果的影响。实验结果表明,板倾角不是影响精煤灰分的显著因素,精煤灰分随着板间距(水速)增大逐渐降低(升高)。板间距不小于6.51cm或水速不超过20.14mm/s时,精煤灰分可控制在10%以下。精煤产率随着板间距(板倾角)增大逐渐下降(升高),较大水速有助于提高精煤产率。在优化的实验条件下,1.5~0.25mm细粒煤的灰分可由21.57%降至10%以下,同时精煤产率在70%~83%。In order to improve the separation prformances of the fine particle coal with the disturbance and fluidized bed, the paper introduced the board inclination, board space and water velocity of the inner part ( a reversed cone type multi borehole plate) affected to the separation effect of the disturbance bed. The experiment results showed that the board inclination would not be the remarkable factor affected to the ash content of the cleaned coal and the clean coal ash content would be decreased (or increased with the board space (water velocity) increased. When the board space less than 6. 51cm or the water velocity not over 20. 14mm/s, the ash content of the clean coal could be controlled below 10%. The clean coal production rate would be decreased (or increased) with the board space (board inclination) increased and a higher water velocity could be favorable to improve the clean coal production rate. Under the optimized experiment conditions, the ash content of the fine particle coal with a size ranging from 21.57% to below 10% and the cleaned coal production rate would be at 70% - 83%.
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