Beijing clean air action plan

　　This year marks the end of the Beijing Clean Air Action Plan for 2013-2017.Beijing Youth Daily reporter learned from the Municipal Environmental Protection Bureau that in the past five years, the city has eliminated 4,923 coal-fired boilers, accounting for 99.8% of the city's total coal-fired boilers and nearly 9 million tons of coal.Among them, 2,837 coal-fired boilers were eliminated this year, which is 3.3 times the task volume, and set a new record.The concentration of sulfur dioxide in this winter is expected to hit a record low.According to preliminary estimates, this year, through the transformation of coal-fired and gas-fired boilers, it can reduce the emission of nitrogen oxides by more than 10,000 tons.oC8Boiler Burner

　　According to the relevant person in charge of the Municipal Environmental Protection Bureau, as of now, the city has eliminated 4,453 coal-fired boilers, creating a new historical record.It is understood that the central unit and the troops stationed in Beijing have completely eliminated coal-fired boilers.At the same time, the city promoted the clean-up of small coal stoves with the utmost intensity.The large stoves and small coal stoves are widely distributed in scattered pollution enterprises, "industrial complexes" and commercial business services.Up to now, 2,1985 and 27,390 small coal stoves recorded in the list of small coal stoves have been eliminated.In the next step, the districts will be thoroughly integrated to prevent rebound.oC8Boiler Burner

　　For gas-fired boilers, in order to promote its deep emission reduction, it is necessary to carry out “low-nitrogen reform” to reduce boiler nitrogen oxide emissions.This work was pioneered in Beijing.Mainly controlled by the source of nitrogen oxides by replacing low-nitrogen burners or low-nitrogen gas boilers.Up to now, the city has completed about 7,000 sets of low-nitrogen boilers and 23,000 tons of steam.The city's completion scale has reached 2.3 times the national and municipal tasks.At present, the nitrogen oxide emissions of gas boilers after renovation can generally be controlled below 80 mg/m3, which meets the emission limit requirements of boilers in use, and some can even be controlled below 30 mg/m3.oC8Boiler Burner

　　The relevant person in charge of the Municipal Environmental Protection Bureau said that this year, the annual average concentration of sulfur dioxide in this city is expected to hit a new low.According to reports, under the combined effect of coal-fired boiler clean energy transformation, four major coal-fired power plants shut down four gas-fired thermal power centers completed and put into operation, and coal-fired clean energy replacement, the annual average concentration of sulfur dioxide in this city continues to decline.In 2013, 28 micrograms per cubic meter fell to 10 micrograms per cubic meter in 2016, a drop of 64.3%.This year, the cumulative concentration of sulfur dioxide in this city continued to decline.As of the end of October, the cumulative concentration of sulfur dioxide was 8 μg/m3.It is expected that the annual average concentration of sulfur dioxide will reach a new low this year.oC8Boiler Burner