京津冀大气污染传输通道城市燃煤大气污染减排潜力

Air pollutant emissions reduction potential from burning coal in cities of air pollution transmission channel in Beijing-Tianjin-Hebei area

以京津冀大气污染传输通道城市为研究对象,建立了燃煤电厂、燃煤锅炉、农村散煤三大污染源主要大气污染物排放计算方法,以2015年为基准年,梳理现有燃煤污染减排政策措施,对2017年"2+26"城市燃煤污染源SO_2、NOx、PM、PM_(10)、PM_(2.5)的减排潜力进行了分析.结果表明:实施燃煤电厂超低排放改造、燃煤锅炉淘汰或改造、散煤改电(气)等措施后,"2+26"城市2017年燃煤SO_2、NOx、PM、PM_(10)、PM_(2.5)排放量分别达到87×10~4t、56×10~4t、64×10~4t、45×10~4t、32×10~4t,预计比2015年分别减少44%、48%、33%、32%、30%.燃煤电厂、燃煤锅炉、农村散煤替代各项污染物减排比例分别在55%~70%、31%~38%、18%~21%,未来农村散煤治理的减排潜力还较大.从各城市情况来看,多数城市燃煤SO_2、NOx减排主要来自燃煤电厂超低排放改造;保定、廊坊等城市燃煤颗粒物减排量较大,得益于散煤治理工作的大力推进.

A framework to estimate air pollutant emissions from coal-fired power plants,coal-fired boilers,and rural residential coal-using was developed for the“2+26”cities located in the air pollution transport channels in the Beijing-Tianjin-Hebei area.The existing policies and measures to control emissions from burning coal in“2+26”cities were summarized and the potentials of reducing SO2、NOx、PM、PM10、PM2.5 emissions was quantified for year 2017.The results showed that SO2、NOx、PM、PM10、PM2.5 emissions from burning coal were 87×104t、56×104t、64×104t、45×104t、32×104t in 2017,respectively,44%,48%,33%,32%and 30%less than which in 2015 due to implementation of major emission control measures including the ultra-low emissions retrofitting in coal-fired power plants,eliminating the coal-fired boilers and switching raw coal into electricity(gas).The reduction rates of coal-fired power plants,coal-fired boilers,and rural raw coal were 55%~70%,31%~38%,18%~21%,respectively.SO2 and NOx emission reductions were mainly attributed to the ultra-low emission of coal-fired power plants for most cities,and PM emission reductions from burning coal of Langfang and Baoding were most significant in the"2+26"cities,mainly thanks to strongly promoting switch from coal into electricity and gas in residential sector.