【摘要】 公路隧道是交通运输网络中的重要基础设施，为治理公路隧道气态污染物，改善隧道空气质量，根据环境工程原理，对公路隧道气态污染物活性炭吸附技术进行试验研究。基于活性炭吸附原理，以柱状活性炭为吸附剂，NO₂为吸附质，采用正交试验方法设计4种方案，对不同活性炭材质、粒径、气体风速和炭层厚度情况下活性炭的NO₂吸附特性进行试验研究。试验结果分析表明：“气体风速”对活性炭吸附效率和压损有显著影响；采用单一材质活性炭时，“活性炭粒径”也有显著影响。分析得到4种试验方案下的最优参数组合，其中最优的组合为组合1:风速0.113m/s, 4mm煤质活性炭，炭层厚度为2h（6cm）。此参数组合下NO₂气体在活性炭炭层中的停留时间为0.53s,净化效率达到90%以上。以上研究成果可为隧道气态污染物吸附装置的设计研发提供参考。更多还原

【Abstract】 Highway tunnel is an important infrastructure in the transportation network. In order to treat gaseous pollutants in highway tunnels and improve the air quality of the tunnels, according to the principles of environmental engineering, the experimental research on activated carbon adsorption technology for gaseous pollutants in highway tunnels is carried out. Based on the principle of activated carbon adsorption, using columnar activated carbon as the adsorbent and NO₂ as the adsorbate, four schemes were designed by orthogonal test methods to test the NO₂ adsorption characteristics of activated carbon under the conditions of different activated carbon material, particle size, gas wind speed and carbon layer thickness. The analysis results showed that: "gas wind speed" has a significant impact on the adsorption efficiency and pressure loss of activated carbon; when using a single material of activated carbon, the "active carbon particle size" also has a significant impact. The analysis obtained the optimal parameter combination under 4 kinds of test schemes, which is 4mm coal-based activated carbon, the wind speed is 0.113m/s, and the carbon layer thickness is 2h（6cm）. Under this parameter combination, the residence time of NO₂ gas in the activated carbon layer is 0.53s, and the purification efficiency reaches more than 90%. The above research results can provide reference for the design and development of the tunnel gaseous pollutant adsorption device.更多还原