燃煤锅炉改造对城区可吸入颗粒物质量浓度分布的影响  

Impact of Transformation of Coal-fired Boiler on the Urban Inhalable Particulate Matter Concentration Distribution in Urban Areas

作　　者：邹惠芬[1] 张晶晶[1] 李绥[1] 杨二东 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2016年第6期1122-1129,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51208312);辽宁省环保厅项目(LNZC20141001076)

摘　　要：目的研究抚顺市可吸入颗粒物浓度的时间变化规律及燃煤锅炉改造前后可吸入颗粒物质量浓度的分布规律,为抚顺市综合整治计划提供理论依据.方法以抚顺市实时监测数据为基础,采用Origin软件对监测数据进行处理并对其分析,采用Fluent软件模拟燃煤锅炉改造前后颗粒物的质量浓度分布情况.结果 2014年1月、10月、11月、12月,可吸入颗粒物污染最为严重,日均值超标率均达到40%以上.24小时中PM_(2.5)的质量浓度有两个峰值,最大值出现在21时,次值出现在9时,15时质量浓度最低.而按照综合整治方案改造抚顺市的燃煤锅炉后,PM_(2.5)的质量浓度也有了明显的降低.结论冬季污染严重的原因是冬季采暖燃煤量大,可吸入颗粒物排放量大,加之气象扩散条件差导致污染严重.改造燃煤锅炉后,可以有效减少可吸入颗粒物排放量.The paper is aimed to time-dependent regularity of inhalable particulate matter concen- tration as well as the concentration distribution regularities of inhalable particulate matter before and after the transformation of coal-fired boiler in Fushun. Based on the real-time monitoring data of inhalable particulate matter and the meteorological data in Fushun, the monitoring data was pro- cessed and analyzed by using Origin. With the help of software Fluent, the concentration distribu- tion of inhalable particulate matter was simulated before and after the transformation of coal-fired boiler. The result shows it is polluted seriously in October, November, December and January, and over-limit ratios are all over forty percent. There are two concentration peak values of PM2.5, the maximum appeared in 21 o ＇clock,the sub-value appeared in 9 o ＇clock,the concentration is the lowest in 15 o ＇clock. And according to the comprehensive improvement plan, after the transforma- tion of coal-fired boiler, the concentration PM2.5 also has significantly reduced. The reason that pol- lution is serious in winter is the use of coal-fired boiler, the increase of pollutant emissions, coupled with poor weather, these lead to severe pollution. After the transformation of coal-fired boiler, air pollutant emissions can be effectively reduced.

关 键 词：可吸入颗粒物 燃煤锅炉改造 数值模拟 变化规律 

分 类 号：X513[环境科学与工程—环境工程]