極性反転高速繰り返しパルス放電の排ガス処理への適用

概要

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We propose a new method for gas cleaning system with repetitive discharges produced by reciprocal voltage pulse in a coaxial cable. When the cable is charged and then grounded at one end of the cable without any resistance, a reciprocal traveling voltage pulse is repeatedly applied to a barrier-type reactor at the opposite end with a change in its polarity. High speed photographs of discharge light showed that the voltage oscillation caused by one switching induced alternate propagation of positive and negative streamers with a very high frequency. The minimum charging voltage which has 50% probability for streamer propagation with the reciprocal pulse generator became much smaller than that with a self-matched pulse generator having a matching resistance. The reason for the difference of the minimum charging voltage was explained by the space charge effect. In the case of reciprocal pulse, a large number of space charges were accumulated on the barrier surface during the cable charging, so that the field strength in the gap was strongly enhanced after the polarity reversal. In a test of NO removal from a flue gas, high NO removal ratio could be obtained under the low charging voltage with the reciprocal pulse generator.
愛媛大学の論文