空气清洗技术是用空气动力的办法加速一氧化氮在空气中的氧化，从而实现在常温下大气量清除氮氧化物的目的。此技术2018年获发明专利。
       下图是福建某工厂高浓度硝酸烟气经两级空气清洗后达标排放情况，烟囱口再没有黄烟排出。
       Air cleaning is using the air dynamic force to inset the oxygen of the air into NO, thus speed up the transform from NO to NO2 in order to absorb by water or alkaline. This technology got invention patent in 2018. The following picture shows the cleaning for a high tense nitrate smoke from a factory in Fujian province. This factory must dry 1mt of nitric acid per every one hour. In the picture, the system is running but no yellow smoke be released from the chimney.