Development of Nonthermal Plasma-EHD Hybrid Air Cleaner System

本研究的目的是开发一种新型的电空气净化器，由一个交流或脉冲高压（30 kV以上）填充床等离子体反应器和一个高性能的直流两级式静电除尘器。这种电动空气净化器能够同时去除灰尘和气态有害化合物。本产品可用于工厂、实验室、无尘室及室内。用强磁场（= 1 T）直流电磁铁研究了稳恒磁场对低温等离子体或去除效率的影响。作为用于激励等离子体反应器的高压电源，交流高压氖Transformer或旋转火花隙型脉冲电源已在以前的研究中使用，半导体型脉冲电源使用SCR和IGBT器件进行了测试，在本研究中。利用傅立叶变换红外光谱仪、气体分析仪和气相色谱仪对反应过程进行了分析。采用小流量脉动风洞和激光粒子计数器对空气滤清器电除尘段的性能进行了评价。获得了与粒径相关的颗粒去除效率。在性能测试中，使用等离子体的气味组分的去除效率= 95%，比能量密度=30 J/L，气溶胶的去除效率=99.0%。

The objective of the present study is to develop a new type electric air cleaner composed of an AC or pulse high voltage (over 30 kV) packed-bed plasma reactor and a high performance DC two-stage type electrostatic precipitator. This electric air cleaner enables to remove dusts and gaseous hazardous chemical compounds simultaneously. This cleaner can be used for factory, laboratory, clean room or indoor house. The effect of a steady magnetic field on the nonthermal plasma or removal efficiency was investigated using a DC electromagnet of strong magnetic field (=1T). As high voltage power supplies for energizing the plasma reactor, an AC high voltage neon transformer or a rotating spark gap type pulse power supply had been used in the previous studies, semiconductor type pulse power supplies using SCR and IGBT devices were tested in the present study. The chemical processes were clarified using FT-IR analyzer and gas analyzers and gas chromatograph. The performance of the s electric precipitator section of the air cleaner was evaluated using a small wind tunnel of small flow fluctuation and a laser particle counter. The size dependent particle removal efficiencies were obtained. The removal efficiency of odor components using the plasma=95%, specific energy density=30 J/L and the removal efficiency of the aerosol=99.0% were achieved in the performance test.