Removal of fine particle, smell and heavy metal by use of new type cyclone with spraying mist and electro potential

采用新型旋流器喷雾电势去除细颗粒、异味、重金属

基本信息

批准号：
17560661
负责人：
YOSHIDA Hideto
金额：
$ 2.24万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

Experimental and numerical studies were conducted about the cut size control with modified dry-cyclone. New type of revised cyclone by use of mist spray showed high particle separation performance compared to the conventional cyclone. By use of the apex cone at the inlet of dust box, it is possible to decrease the fluid velocity component in the dust box and to reduce the re-entrainment of particles from the dust box. The cut size indicated the minimum value for the specific height of the apex cone. The optimum apex cone height changed to the lower position as the cyclone inlet velocity increases. The effect of the apex cone increased under low inlet flow velocity condition. The optimum apex cone angle was about 70 deg.Classification performance of modified cyclone by use of an additional fluid in upper cylindrical part was also examined. By selecting a special part of additional flow position, it was possible to reduce the cut size with the increase of additional flow rate. Three dimensional numerical simulation were also conducted and compared with the experimental data.In order to classify fine particles and heavy metal in slurry flow, horizontal type water sieve with electro-potential applied to flow is newly developed. The experimental classification performances were compared with numerical calculation. Test particles used were pure silica with mass median diameter of 4.1 μm. Effects of inlet flow rate, slurry concentration, applied potential on particle classification were also examined. It is found that the newly developed water sieve is quite effective to separate fine particle and heavy metal.

通过改良的干循环进行了有关切割大小控制的实验和数值研究。与常规旋风相比，通过使用薄雾喷雾剂的新型修订的旋风分离器表现出较高的颗粒分离性能。通过在防尘箱入口处使用顶端锥体，可以减少尘埃盒中的流体速度成分，并减少从灰尘盒中重新进入颗粒。切割尺寸表示顶端锥体的特定高度的最小值。随着气旋入口速度的增加，最佳顶端锥高度变为较低位置。在低入口流速度条件下，顶端锥的作用增加。还检查了最佳顶端锥角约为70度。还检查了在上圆柱部分中使用额外的流体的修饰旋风分离的分类性能。通过选择额外流动位置的特殊部分，可以随着额外的流量增加而减小切口尺寸。还进行了三维数值模拟，并将其与实验数据进行了比较。为了对浆液流中的细颗粒和重金属进行分类，水平型水筛子与电施加到流量的水平筛分是新开发的。将实验分类性能与数值计算进行了比较。所使用的测试颗粒是纯二氧化硅，质量中值直径为4.1μm。还检查了入口流量，浆液浓度，对粒子分类的潜力的影响。发现新发达的水筛对于分离细粒子和重金属非常有效。