电除尘器烟道中的高密度离子产生技术

Technology of Generating High Density Ions in the Flue of ESP

目前电除尘器存在着微小颗粒粉尘捕集效率低、本体体积庞大和能耗高等问题。为了解决这一问题,基于烟道中粒子动量高、放电通道中离子输运特性有很大提高的特点,将离子源、荷电凝并装置设置于电除尘器前烟道中。实验结果表明气体粒子动量为9.82×10-22g.cm/s,离子源中的电场强度为7 kV/cm,电晕极线间距为25mm,异极间距为10 mm,离子密度可达到1.97×109cm-3,比现有电除尘器的离子密度高出2～3个数量级,进而可省去一个相当电除尘器的除尘室大小的荷电设备。实验结果表明可以实现在不增加电除尘器室数、不改变原有运行方式和运行参数条件下,利用烟道中的气体粒子动量高的特点,解决现有电除尘器预荷电离子密度过低问题,从而有利于微细粉尘的荷电凝并,增大其捕集效率。

Inefficiency of collecting submicron dust,great volume and much consuming energy and so on are the problems of ESP in being.In the paper the ion source and the charging and coagulation equipment were set in the flue,with high ion transportation rate for high particle momentum.in the conditions of particle momentum of 9.82×10-22 g·cm/s,electrostatic field intensity of 7 kV/cm,the gap spacing between two powered electrodes of 25 mm and the gap spacing between powered electrodes and its adjacent grounded electrode of 10mm,the ion density was 1.97×109 cm-3,which was two^three orders of magnitude higher than the ion density in being.Then we can save a charging system equal to a room of ESP.we need not increase the rooms of ESP,not change the running matter and the parameter,but only make use of the high momentum of charging particles in the flue to solve the problem of much low ion density of ESP.