防风网对露天煤堆PM2.5的减排效果评估方法

Evaluation method of PM2.5 emission reduction effectiveness of a porous fence to an open coal stockpile

  • 摘要: 科学评价防风网的减排效果,特别是其针对PM2.5的减排率,对指导防风网优化设计和防风网工程的验收具有重要意义。提出一种计算防风网对露天煤堆PM2.5的减排效果新方法。采用Fluent软件计算出煤堆前的最大风速值,并代入美国国家环保局(US EPA)推荐的露天堆场扬尘排量计算公式,分别计算出设置防风网前后露天煤堆PM2.5的月排放量。结果表明,开孔率为40%的平面型防风网对露天煤堆的PM2.5减排率可达99.33%。为了验证该计算方法的有效性,采用其他减排效果计算方法对此煤堆进行了计算,结果显示两种方法的计算结果相一致。

     

    Abstract: Evaluating the emission reduction effectiveness of porous fence especially for PM2.5 scientifically is meaningful for directing the optimization design of porous fence and the acceptance of porous fence facility.A novel method was proposed to evaluate PM2.5 emission reduction effectiveness of a porous fence to an open coal stockpile.An open coal stockpile and the wind condition of a month in a literature were employed and a computational fluid dynamics software Fluent was employed to calculate the maximum wind velocity in front of the stockpile with and without porous fence.The data of maximum velocity and wind conditions were put into the formula of emission calculation for PM2.5 recommended by US EPA (United States Environmental Protection Agency) to calculate the PM2.5 emission of the stockpile.The results indicated that the emission reduction efficiency of plane porous fence with 40% porosity reached up to 99.33%.In order to validate this method, the condition of this method was put into another method.The results of those two methods were in well agreement.

     

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