船舶大气污染物时频特征分析  

Analysis of Time-Frequency Characteristics of Air Pollutants from Ships

作　　者：庄凯 封学军[1] 王康 沈金星[2] ZHUANG Kai;FENG Xue-jun;WANG Kang;SHEN Jin-xing(College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;College of Civil Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《环境科技》2021年第1期55-59,64,共6页Environmental Science and Technology

基　　金：江苏省生态环境厅2019年度省级环保科研课题:江苏省移动源污染防治监管综合能力研究及应用示范(2019004);江苏省基础研究计划(BK20170879)。

摘　　要：随着长江南京段及下游12.5 m深水航道工程的全线贯通,长江江苏段航道大气环境的治理,亟待新的航行条件下大气污染物的排放情况作为基础。在长江江苏段选择研究区域,应用船舶动力法对船舶大气污染物排放进行测算,在船舶大气污染物质量浓度数据分析中引入HHT变换。结果表明:研究区域内污染物平面浓度呈周期性分布,SO2波动区间集中于0~0.10 mg/m^(2),NOx集中于0~6.19 mg/m^(2),PM2.5集中于0~0.25 mg/m^(2),CO集中于0~0.74 mg/m^(2),VOCs集中于0~0.98 mg/m^(2);各类污染物总量随时间的波动趋势基本一致。污染物浓度数据的波动均为低频长周期波动,影响波动的主要为长周期因素。With the completion of the 12.5 m deep water channel project below Nanjing in the Yangtze River,the atmospheric environmental governance of the Yangtze River in Jiangsu urgently requires the emission situation of air pollutants in the channel under new navigation conditions.A study area was selected in the Yangtze River in Jiangsu,and the ship power method was used to calculate air pollutants from ships and the HHT transformation was introduced in the analysis of air pollutants from ships.The results show that the daily pollutant concentration presents a periodic distribution in the area.The fluctuation range of SO2 is concentrated in 0~0.10 mg/m^(2),NOx is concentrated in 0~6.19 mg/m^(2),PM2.5 is concentrated in 0~0.25 mg/m^(2),CO is concentrated at 0~0.74 mg/m^(2),VOCs is concentrated at 0~0.98 mg/m^(2);the fluctuation trend of the total amount of all kinds of air pollutants over time is basically the same.The fluctuations of air pollutants concentration data are low-frequency and long-period fluctuations.The main factors affecting the fluctuations of air pollutants concentration data are long-term factors.

关 键 词：船舶大气污染 船舶动力法 HHT 时频分布 

分 类 号：X8[环境科学与工程—环境工程]