Development of Nonthermal Plasma-EHD Hybrid Air Cleaner System

本研究的目的是研制一种由交流或脉冲高压(30kV以上)填充床等离子体反应器和高性能直流两段式电除尘器组成的新型电动空气净化器。这种电动空气净化器能够同时清除粉尘和气态危险化合物。该清洁剂可用于工厂、实验室、洁净室或室内房屋。用强磁场(=1T)的直流电磁铁研究了恒定磁场对非热等离子体或去除效率的影响。以往的研究主要采用交流高压霓虹灯变压器或旋转火花隙脉冲电源等为等离子体反应堆提供能量的高压电源，本研究对采用可控硅和IGBT器件的半导体脉冲电源进行了试验研究。用傅立叶变换红外光谱仪、气体分析仪和气相色谱仪对化学过程进行了分析。利用小流量脉动风洞和激光粒子计数器对空气净化器S电除尘器段的性能进行了评价。得到了颗粒去除效率随颗粒大小的变化规律。在性能试验中，等离子体对恶臭成分的脱除效率为95%，比能量密度为30J/L，气溶胶的脱除效率为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.