Taiyuan University of Technology Tunlan Coal Preparation Plant,Xishan Coal Electricity Group Company Limited

针对屯兰选煤厂由于生产环境封闭导致生产过程中产生的煤尘积聚易造成环境污染的问题,在分析选煤厂煤尘危害性的基础上,根据现场煤尘产生来源、产生方式、粒度级别的不同,以及对现场煤尘质量浓度分析,分别采取如下措施:针对煤尘的一次煤尘和二次煤尘产生环节特点,将振动筛、破碎机、给煤机、转载溜槽进行封闭,采用布袋式除尘器进行除尘;对重点煤转运环节以及二次煤尘产生环节,采用增设除尘喷雾方式进行除尘。改造前后煤尘质量浓度检测结果表明,经过布袋式除尘器和除尘喷雾系统的联合作用,系统正常开车时煤尘质量浓度降低3 mg/m~3左右,临时停车后启动过程中煤尘质量浓度平均降低2 mg/m~3左右,治理效果显著,有效改善了现场工作环境。

According to the enironment pollation problem caused by the coal dustaccunulation resulted from closed producion environment during the productionprocess in Tunian Coal Preparation Plan,based on the analysis on the coal dust danger of the coal preparation plant.accoding to the sie cal dust sourcesoccured mod diferent cal paricle grade and sSite coal dust mass density analysis,the folowing measures were conducted individual y. According to the link features of the primary coal dust and secondary coal dustoccured.cosures were made to the vibration screen.coal crusher.coalfeeder and stage chute and the bag dustc llctors were applied to the dust clcion. As for the key coal transer links and the secondar high dust links adtonal dust colection and water spraying mode were appiedto the dust collction.Before and aiter the reonstruction.the dection resuts of the cal dust mass densty showed that withthe combined role of the bag dust collctor and te dust cllecion and water spraying system,ywhen the system was nmormally operated,the coal dust mas density would be reduced by abou 3 mg / ms. Afier an operaton stopped temporarily in the equipment restarting pro.ess.he average coal dust densty would be reduced by about mg / n3.Thus the dust cotrolefect was obious and the site operation environment was effectively improved.