• 关键词：石化企业  排放清单  空气质量影响  CMAQ  污染浓度贡献

• 基金项目：广东省省级科技计划项目（No. 2019B020208006）

• 彭子龙
• 华南理工大学环境与能源学院，广东省大气环境与污染控制重点实验室，广州 510006

• 朱云
• 华南理工大学环境与能源学院，广东省大气环境与污染控制重点实验室，广州 510006

• 袁颖枝
• 华南理工大学环境与能源学院，广东省大气环境与污染控制重点实验室，广州 510006

• 方婷婷
• 华南理工大学环境与能源学院，广东省大气环境与污染控制重点实验室，广州 510006

• 陈莺
• 华南理工大学环境与能源学院，广东省大气环境与污染控制重点实验室，广州 510006

• 常旺
• 华南理工大学环境与能源学院，广东省大气环境与污染控制重点实验室，广州 510006

• 曾建伟
• 广东省生态环境监测中心，广州 523146

• 摘要：基于惠州市大亚湾区2017年大气污染源排放清单，利用WRF-CMAQ模型系统量化评估了大亚湾区某典型石化企业在关停和增产排放情景下对周边空气质量的影响.清单结果显示该企业2017年SO₂、NO_x、PM₁₀、PM_2.5、CO和VOCs的排放量分别为212 、1744 、455 、359 、1458 和6446 t，在严格落实等量替代及减排措施后，该石化企业虽然产能翻倍，但VOCs排放量同比2017年显著减少了30%，其它污染物排放量增加了6%~19%.模拟结果显示2017年该石化企业排放对大亚湾区NO₂、PM₁₀、PM_2.5和O₃的浓度贡献分别为0.91、0.64、0.54和-0.08 μg·m^-3，完全关闭该企业排放后对周边站点NO₂改善效果最大（可使邻近管委会子站NO₂浓度下降1.24 μg·m^-3，下降百分比为5.10%），但由于NO的滴定效应，该企业NO_x减排对周边管委会子站和霞涌子站的O₃浓度均有轻微负贡献；该石化企业的增产改造对周边O₃浓度降低影响明显，周边站点中O₃浓度最高可下降2.45 μg·m^-3（下降幅度为1.72%），大亚湾区O₃浓度整体也可下降1.45 μg·m^-3.此外，受秋冬季不利扩散条件以及主导上风向污染传输影响，该企业在1月和10月对管委会子站NO₂、PM₁₀和PM_2.5的浓度贡献较大，由于冬季低温导致光化学反应自由基活性降低，该企业在1月对管委会子站O₃浓度负贡献显著.

• Abstract：In this study， based on the 2017 air pollutant emission inventory in Dayawan， a district of Huizhou city， the shutdown and production increase impacts of a typical petrochemical company in Dayawan on the surrounding air quality were quantified using the WRF-CMAQ modeling system. Emission inventory results indicated that the emissions of SO₂， NO_x， PM₁₀， PM_2.5， CO and VOCs from the selected petrochemical company were 212， 1744， 455， 359， 1458 and 6446 t respectively in 2017. After the implementation of emission alternatives and strict reduction measures， the selected petrochemical company achieved a doubled production， but the VOCs emissions were significantly decreased by 30%， while the emissions of other pollutants increased by 6% to 19% compared to that in 2017. Simulation results showed that the emission contribution of the selected petrochemical company to the concentrations of NO₂， PM₁₀， PM_2.5 and O₃ in Dayawan was 0.91， 0.64， 0.54 and -0.08 μg·m^-3 respectively in 2017. The shutdown of the selected company contributed the most to NO₂ declines in the surrounding national-controlled air-monitoring stations， such as the Guanweihui station in which the NO₂ can be reduced by 1.24 μg·m^-3 （with a decline rate of 5.10%）； however， due to the effect of NO titration， the NO_x emission reduction of the selected company exerted slight negative contribution to O₃ in the Guanweihui and Xiachong stations. The production increase and technology transformation of the selected company exhibited a significant impact on O₃ decreases in the surrounding stations， in which the O₃ concentrations can be decreased by up to 2.45 μg·m^-3 （with a decline rate of 1.72%）， and the overall O₃ concentrations in Dayawan can be also decreased by 0.82 μg·m^-3. In addition， affected by the poor air diffusion condition and the transported pollutants from upwind areas in autumn and winter， the emissions of the selected company made significant positive contributions to the concentrations of NO₂， PM₁₀ and PM_2.5 in the Guanweihui station in January and October， while an obvious negative contribution to O₃ in January due to the low temperature and decreased radical activity in winter.

• Key words：petrochemical company  emission inventory  air quality impact  CMAQ  pollution concentration contribution

• 
  摘要点击次数： 188 全文下载次数： 246