This year is the closing year of Beijing's five-year Clean Air Action Plan. Reducing coal combustion is one of the key tasks. Yesterday, the Municipal Environmental Protection Bureau reported that 99.8% of the coal-fired boilers in the city have been eliminated in the past five years, correspondingly reducing coal consumption by nearly 9 million tons. This year, the city's clean coal and nitrogen reduction projects have been substantially over-completed, reducing nitrogen oxides every year. The emissions of pollutants such as dust and sulfur dioxide reached 22,000 tons, and the annual average concentration of sulfur dioxide is expected to hit a new low.

The reporter learned that in order to promote the deep reduction of nitrogen oxides in boilers, Beijing is the first in the country to carry out low-nitrogen reformation of gas boilers, mainly by replacing low-nitrogen burners or low-nitrogen gas boilers to control the source of nitrogen oxides. . Up to now, Beijing has completed about 7,000 sets of low-nitrogen boilers and 23,000 tons of steam. 

According to preliminary estimates, this year's two projects of clean energy conversion of coal-fired boilers and low-nitrogen reformation of gas-fired boilers can achieve annual emission reductions of about 5,700 tons and 4,800 tons of nitrogen oxides, respectively, totaling more than 10,000 tons. The clean energy transformation of coal-fired boilers can achieve an annual reduction of nearly 3 million tons of coal, an annual emission reduction of about 5,500 tons of dust and about 6,600 tons of sulfur dioxide.