Optimization Of Discharge Space And Effect On Indoor Air Particulates Collection Of Needle-matrix Bipolar Corona Discharge

With the development of national economy and the improvement of people's living standard, the requirement of healthy living is becoming more and more important. Generally, one person spends most of his time in the house. The IAQ (indoor air quality) condition has a direct influence on the health of human beings. One of the main measures of improving IAQ is to control indoor air contaminants.Particulate is one of the primary indoor air contaminants. Particulate is one of the major killers of indoor air quality and human health, and should been paid more attention. Particulate removal technologies mainly include mechanical filtration, negative ions generation, electrostatic precipitator and non-thermal plasma treatment. Non-thermal plasma method, as a promising technology with high efficiency and low cost, has been widely studied both home and abroad. The proposed multi-needle-to-multi-needle corona discharge is more powerful at discharge energy density and stability than the ones of needle-to-plate corona discharge.In order to gain the effective method and results of improved discharge energy density of multi-needle-to-multi-needle corona discharge, the discharge experiments with different spaces between needlepoints, different spaces between electrode and different needlepoint radius had been conducted. Meanwhile, the effects of the spaces between needlepoints and between electrodes, and the effects of needlepoint radius on discharge energy density had also been analyzed theoretically. Generally, discharge energy density can be changed very little while the needlepoint radius is smaller than 0.1 mm. At the same time discharge energy density reduces with increase of spaces between needlepoints and between electrodes, but it has small changes when the space between needlepoints is in the range of 12mm ~ 22mm. The optimum space between needlepoint is about 16mm. And the allowable discharge energy density is up to its peak value when the space between electrodes is about 32mm.The non-thermal discharge reactor was made at the optimum parameters, and was used for the particulate matter removal experiments. The effect of different operation parameters(applied voltage, wind speed) on purify efficiency and clean air delivery rate was researched by the above experiments. And we concluded that the reactor operation parameters has a great impact on its purify efficiency. The purify...