摘要
以京津冀地区为研究区域,采取自下而上的方法,建立京津冀地区钢铁行业细化至焦化、烧结和球团、炼铁、炼钢、轧钢等工序的多污染物排放清单.清单估算结果显示,2015年京津冀地区钢铁行业SO_2、NOx、TSP、PM_(10)、PM_(2.5)、CO、VOC的排放量分别为38.82、27.23、79.19、53.15、38.68、823.38、26.53万t,其中烧结和球团工序是最主要的污染物排放工序(17.0%~72.0%),其次为炼铁工序(4.6%~42.4%)和轧钢工序(3.5%~35.7%).采用具有污染物来源示踪功能的双层嵌套气象-空气质量模型系统(WRF-CAMx)耦合模型模拟京津冀地区钢铁行业污染物排放对区域大气PM_(2.5)浓度的影响.模拟结果显示:钢铁行业在春夏秋冬这4个季节对京津冀地区PM_(2.5)浓度贡献率分别达到14.0%、15.9%、12.3%、8.7%.各地市中,钢铁行业对唐山市PM_(2.5)影响最大,年均PM_(2.5)浓度贡献率高达41.2%,其次为秦皇岛市、石家庄市、邯郸市,年均PM_(2.5)浓度贡献率分别达到19.3%、15.3%、15.1%.
The iron and steel industry,which discharges a large amount of pollutants including SO2,NOx,and PM2.5,is the main source of atmospheric pollution in the Beijing-Tianjin-Hebei region. Based on the bottom-up method,a high temporal and spatial resolution emission inventory of the iron and steel industry in the Beijing-Tianjin-Hebei region was developed,which took into account the multiple air pollutants released during coking,sintering,pelletizing,ironmaking,steelmaking,and the steel rolling process. As the emission inventory showed,the total emissions of SO2,NOx,TSP,PM10,PM2.5,CO,and VOC from the iron and steel industry in the Beijing-Tianjin-Hebei region in 2015 were 388. 2,272. 3,791. 9,531. 5,386. 8,8233. 8,and 265. 3 kilotons,respectively,among which,sintering and pelletizing were the two processes discharging the most pollutants（ 17. 0%-72. 0%）,followed by the ironmaking process（ 4. 6%-42. 4%） and the steel rolling process（ 3. 5%-35. 7%）; the iron and steel industry in Tangshan discharged the most pollutants（ 39. 1%-63. 5%） among those in all the 13 cities. The impact of the iron and steel industry on the regional PM2.5 concentration was simulated by a two-layer nested meteorology-air quality coupling model system（ WRF-CMAx） with Particulate Source Apportionment Technology（ PSAT）. The simulation results showed that the iron and steel industry contributed14. 0%,15. 9%,12. 3%,and 8. 7% of the PM2.5 concentrations of the Beijing-Tianjin-Hebei region in spring,summer,autumn,and winter,respectively,and that the iron and steel industry had the most significant impact on the PM2.5 concentrations in Tangshan among all the 13 cities,with a contribution rate up to 41. 2%,followed by those in Qinhuangdao,Shijiazhuang,and Handan,with contributions of 19. 3%,15. 3%,and 15. 1%,respectively. The iron and steel industry has an important impact on the PM2.5 concentration of the Beijing-Tianjin-Hebei region to which the government should pay more attention,and take more effective control measures to addr
作者
段文娇
郎建垒
程水源
贾佳
王晓琦
DUAN Wen-jiao, LANG Jian-lei, CHENG Shui-yuan , JIA Jia, WANG Xiao-qi(Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, Chin)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第4期1445-1454,共10页
Environmental Science
基金
国家自然科学基金项目(91544232
51638001)
北京市科学技术委员会项目(Z161100004516013
Z171100002217002)
