反向电场电袋过滤PM_(2.5)的试验研究

Experimental study on PM_(2.5) filtration via the bag filter in a reversed electric field

为高效收集微细颗粒物,提出一种反向电场静电增强袋式除尘器;并研究了过滤风速对反向电场静电增强袋式除尘器除尘效率的影响;试验对比了反向电场静电增强袋式除尘器、预荷电袋式除尘器、普通袋式除尘器的除尘效果,结果表明,反向电场袋式除尘器的除尘性能明显优于普通袋式除尘器和预荷电袋式除尘器。对于处理PM2.5烟雾,当风速为1.5 m/min时,反向电场静电增强袋式除尘器的除尘效率比普通袋式除尘器高10.0%以上;当风速为2.0 m/min时,反向电场静电增强袋式除尘器的除尘效率比普通袋式除尘器高50.0%以上。

The article is inclined to present an experimental study on PM2. 5filtration via the bag filter in a reversed electric field.The said bag filter has been developed by the given author to be used to collect the fine particles in the industrial gas,whose efficiency can be enhanced with an electrostatic enhancement bag,which consists of a kind of pre-charging appliance,the high voltage DC current and a bag filter with a reversed electric field device. To achieve the purpose of PM2. 5filtration,we have first of all analyzed the collection principle of the said bag filter,and tested the collection function of the said bag filter for PM2. 5fume particles. For its further successful application,the impacts of the filtration velocity on the collection efficiency of the said bag filter have been experimented. As is known,if the filtration speed can be promoted as high as about 1. 0 m / min,its collection efficiency can be regarded as being high enough. In order to respond to the different demands of the collection performance,it is convenient to set the filtration speed at 1. 5 m / min and 2. 0 m / min. To achieve the aforementioned goal,we have arranged a contrast experiment with the pre-charging bag filter and the conventional bag filter. The said experimental results have shown that the collection efficiency of the electrostatically enhanced bag filter with the reversed electric field can be taken as noticeably higher than that of the precharged bag filter and the conventional bag filter. However,when the filtration speed is 1. 5 m / min,the collection efficiency for PM2. 5fume particles of the said enhancement bag filter with the reversed electric field should be 10. 0% higher than that of the conventional one. What is more,when the filtration velocity is set at 2. 0 m / min,the collection efficiency of the electrostatic enhanced one with the reversed electric field can likely be made 50. 0% higher than that of the conventional one. Thus,it proves that the electrostatically enhanced bag filter with the reversed electric field can be applied in a wider range of filtration speed as compared with the conventional one. Therefore,an applicable technical method for collecting the fine particles efficiently in the industrial gas could possibly be provided from this research work.