“2+26”城市秋冬季大气污染治理措施效果评估

Assessment on air pollution control measures during autumn and winter seasons in“2+26”cities

针对京津冀及周边“2+26”城市秋冬季不同大气污染治理措施的减排量进行核算,结果表明,2017~2018年秋冬季“2+26”城市SO_(2),NO_(x),VOCs,PM_(2.5)和PM_(10)的总减排量分别为43.26,20.63,18.36,28.00和47.31万t,2018~2019年秋冬季“2+26”城市SO_(2),NO_(x),VOCs,PM_(2.5)和PM_(10)的总减排量分别为16.68,18.11,11.03,17.04和25.33万t.基于此,采用CAMx模型对各项措施的减排效果进行模拟评估,采取措施后,2017~2018年秋冬季“2+26”城市SO_(2),NO_(x),PM_(2.5)和PM_(10)浓度的平均下降量(下降率)分别为22.69μg/m^(3)(42.67%),33.22μg/m^(3)(37.81%),24.28μg/m^(3)(22.58%)和31.26μg/m^(3)(18.67%),2018~2019年秋冬季“2+26”城市SO_(2),NO_(x),PM_(2.5)和PM_(10)浓度的平均下降量(下降率)分别为9.36μg/m^(3)(26.86%),25.73μg/m^(3)(30.62%),16.38μg/m^(3)(16.09%)和20.43μg/m^(3)(12.33%).2017~2018年秋冬季各项措施对PM_(2.5)浓度的平均减排效率排序依次为:“散乱污”企业治理>交通运输结构调整>企业错峰生产>民用散煤替代>燃煤锅炉综合整治,2018~2019年秋冬季各项措施对PM_(2.5)浓度的平均减排效率排序依次为:重点行业升级改造>企业错峰生产>“散乱污”企业治理>交通运输结构调整>民用散煤替代>燃煤锅炉综合整治.

Emission reductions from different air pollution control measures during autumn and winter seasons in“2+26”cities of Beijing-Tianjin-Hebei and its surrounding areas were calculated in this study.The results showed that total emission reductions of SO_(2),NO_(x),VOCs,PM_(2.5),and PM_(10) in“2+26”cities during autumn and winter seasons in 2017~2018 were 432.6,206.3,183.6,280.0,and 473.1kilo-tons respectively,while those of which in 2018~2019 were 166.8,181.1,110.3,170.4,and 253.3kilo-tons respectively.According to this,the effects of each measure were evaluated by the CAMx model.By implementing air pollution control measures,the simulated concentrations(percentages)of SO_(2),NO_(x),PM_(2.5),and PM_(10) in“2+26”cities during autumn and winter seasons in 2017~2018 decreased 22.69μg/m^(3)(42.67%),33.22μg/m^(3)(37.81%),24.28μg/m^(3)(22.58%)and 31.26μg/m^(3)(18.67%)respectively,while those of which in 2018~2019 decreased 9.36μg/m^(3)(26.86%),25.73μg/m^(3)(30.62%),16.38μg/m^(3)(16.09%)and 20.43μg/m^(3)(12.33%)respectively.The sequence of averaged reduction efficiency on PM_(2.5) concentrations of each control measure during autumn and winter seasons in 2017~2018 was as follows:scattered and disqualified enterprises governance,transportation structural adjustment,industrial off-peak production,civil coal burning replacement,and coal-fired boiler renovation,and that of which in 2018~2019 was as follows:upgrading and transformation of key industries,industrial off-peak production,scattered and disqualified enterprises governance,transportation structural adjustment,civil coal burning replacement,and coal-fired boiler renovation.