城市隧道运营通风与净化系统设计探讨

Analysis of Operation Ventilation and Purification System of Urban Tunnel

以北京新建隧道工程为研究对象,对隧道内污染物排放和分布特征、隧道通风与净化系统设计等问题进行分析探讨。结果表明,随着清洁能源车保有量的不断上升,机动车污染物(CO、NOX等)的排放量呈下降趋势。本工程中,隧道内污染物浓度远低于限值,洞口排放污染物浓度高于环境空气质量标准。右线污染物浓度高于左线。隧道通风与净化系统组成和规模的主要影响因素为污染物排放限值及排放系数、交通流量和净化站位置等。

This paper analyzes the emission and distribution characteristics of pollutants inside and outside a tunnel in Beijing,and the design of tunnel ventilation and purification system.The main conclusions include that the emission of pollutants(CO,NOX,etc.)is decreasing with the continuous rise of new energy vehicles.In this case,the pollutant concentration in the tunnel is lower than the limitation,but the pollutant concentration at the entrance is higher than the standard.The pollutant concentration on the right is higher than that on the left.The tunnel pollutant emission standard,traffic flow,pollutant emission coefficient and purification station location will affect the composition and scale of tunnel ventilation and purification system.