Development of an Indoor Air Cleaner for a Non Toxic Room by Electrostatic Technique

Abstract

In this paper, an indoor air cleaner for a non-toxic room by electrostatic technique was designed,developed and tested. The cleaner prototype consists of a particle charger, a particle collector, an ionizer,a fan, a speed controller, a timer and a high voltage power supply. In this system, a fan draws a sample airinto the system through a wire-to-plate particle charger to set a charge on the particulate. After the particlecharger, the charged particulates then enter the multiple-tube particle collector that consist multiple-tubesand corona discharge electrodes. In the collector, the discharge electrodes are high voltage power supply,while the multiple-tube is grounded. The corona discharge field inside the collector will be caused aroundthe discharge electrodes. When charged particulates flow into the collector to collect and deposit with theelectrostatic force on the inner walls of the outer tube and the air without particulate then passes out througha ionizer to discharge air and the charge neutrality to improve the clean air quality. In this study, an electrostaticcharacteristic as well as a collection and treatment efficiencies were analytically and experimentallystudied. It was report that the collection efficiency of the collector is up to 99 % at the particle diameter ofabout 1.5, 7 and 18 μm with the air velocity of 0.1, 0.5 and 1 m/s, respectively, for corona voltage of 10kV. It was also showed that the developed prototype will be effective in the removal of particulate up to99% at the time of treatment for 70 minutes.

Keywords : Particulate Matter / Air Pollution / Indoor Air Cleaner / Electrostatic