应用于城市隧道的除尘脱硝技术及关键设备研究

发布时间：2018-01-07 02:20

本文关键词：应用于城市隧道的除尘脱硝技术及关键设备研究　出处：《浙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：当前,我国机动车保有量急剧增长,所排放的尾气污染日益严重。随着我国城市建设的发展和交通需求量的增大,城市隧道的数量及长度呈剧增态势。作为相对封闭的人造空间,隧道因内外空气交换不易,导致机动车尾气所排放的颗粒物(PM)和二氧化氮(NO2)等典型气态污染物逐渐积累,严重影响了城市隧道内的行车环境,对隧道内驾乘人员和周边居民的身体健康造成了严重威胁。本文针对如何将除尘脱硝技术及其关键设备有效应用于城市隧道进行了设计研究,以期为我国城市隧道的典型空气污染物治理提供理论设计依据。首先,本文综合比较和分析了现有隧道的空气净化技术,选择具有净化效率高、工程应用成熟并且经济可行的“静电除尘+吸附脱硝”作为城市隧道典型空气污染物(PM和NO2)的治理技术。接着,选择一条3000m长的典型城市隧道作为除尘脱硝技术及其关键设备的设计应用对象。通过对稀释CO和烟雾需风量进行比较,确定除尘脱硝设备运行的处理风量为250 m3/s。在距离隧道洞口1832 m处开通旁路通道,作为除尘脱硝设备的安装机房位置。然后,根据250 m3/s的处理风量,对除尘效率为80%的静电除尘设备和脱硝效率为90%的吸附脱硝设备进行选型,确定最佳运行条件和设计方案。根据每天14 h的运行时间,对城市隧道除尘脱销设备的运行费用进行核算和经济性分析。最后,对现有的城市隧道除尘脱硝技术进行改进研究。初步设计了一种用于城市隧道典型空气污染物中的颗粒物(PM)收集、二氧化氮(N02)吸附的结构简单、功能全面、操作方便、成本低的移动式城市隧道除尘脱硝车。
[Abstract]:At present, the number of motor vehicles in China is increasing rapidly, and the emission of exhaust gas is becoming more and more serious. With the development of urban construction and the increase of traffic demand in China. The number and length of urban tunnels increase dramatically. As a relatively closed artificial space, the tunnel is not easy to exchange air between inside and outside. The accumulation of typical gaseous pollutants such as particulate matter (PMPM) and nitrogen dioxide (no _ 2) from vehicle exhaust has seriously affected the driving environment in urban tunnels. It poses a serious threat to the health of drivers and residents around the tunnel. This paper studies how to effectively apply the dedusting and denitrification technology and its key equipment to the urban tunnel. In order to provide a theoretical basis for the treatment of typical air pollutants in urban tunnels in China. Firstly, this paper comprehensively compares and analyzes the existing tunnel air purification technology, the selection has high purification efficiency. Engineering application of mature and economic "electrostatic dust removal adsorption denitrification" as a typical urban tunnel air pollutants PM and no _ 2) treatment technology. A typical city tunnel with a length of 3000m is selected as the design and application object of dust removal and denitrification technology and its key equipment. It is determined that the handling air volume of the dust-removal and denitrification equipment is 250 m3 / s. A bypass passage is opened at 1832 m from the tunnel entrance as the installation room position of the dust-removal and denitrification equipment. Then. According to the treatment air volume of 250m3 / s, the electrostatic dedusting equipment with dust removal efficiency of 80% and the adsorption denitrification equipment with denitrification efficiency of 90% were selected. According to the operation time of 14 hours per day, the operating cost and economic analysis of the dedusting and unloading equipment in the city tunnel are carried out. The existing technology of dust removal and denitrification in urban tunnels was studied. A new method for collecting particulate matter (PMN) from typical air pollutants in urban tunnels was designed. The structure of nitrogen dioxide (N02) adsorption was simple. Mobile Dust removal and denitrification vehicle with full function, convenient operation and low cost.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X734

【共引文献】