公路隧道空气净化的实验研究

随着交通事业的发展，公路隧道，特别是长大隧道，在整个线路中所占的比重越来越大。由于隧道是个相对闭塞的空间，污染空气不易扩散，致使隧道空气中污染物质的浓度不断增加。目前，国内外普遍采用通风换气法来稀释、控制隧道空气中污染物的浓度，使其达到环保要求。对长大隧道，有时不得不增大隧道断面或设置通风竖井，以满足通风要求。这必然导致增大初期投资和运行费用。因此，国际上正在探索新的技术途径来治理公路长隧道空气污染问题。笔者用脉冲电晕放电技术对公路隧道中的污染空气进行了净化实验研究。实验取得满意效果，除尘效率达９０％ 以上，ＣＯ氧化脱除率可达７０％ 。该技术为解决公路长隧道污染空气的就地净化问题提供了一条新的途径。

Experimental Study on Air Cleaning of Highway Tunnel

With the development of transporation, more and more highway tunnels,especially the big and long tunnels, are built on the hihgway. It is difficult for the pollutants to be diffused from the tunnel, so the air in the tunnel is heavily polluted. Now ventilation is the usual way to clean the air. Due to the huge investment and great cost in constructing the ventilation system and running the factilities, this method is not consideted to be an ideal one to deal with therefore, other methods and technologies about how to control the pollution in highway tunnel are being explored. Experimental study on air clening in highway tunnel using pulse corona discharge is conducted. Under simulated conditions,91% of dust could be collected and 70% of carbon monoxide could be oxidized. It shows a promising future in applying the pulse corona discharge to clean the polluted air in highway tunnel.