Research On The Environmental Air Quality Of Coal-fired Flue Gas Pollutants In Qinggang Town

As an industrial town in the north,Qinggang Town consumes mainly coal,which is used for heat and energy consumption.The quality of the atmospheric environment in the city is relatively poor,and even worse in winter.How to improve the atmospheric environment quality of Qinggang Town under the premise of ensuring economic and normal life has become a top priority.The equivalent pollution load method was adopted to identify the main pollution sources and major pollutants of coal-fired flue gas in Qinggang Town.Geographical distribution,the maximum concentration of the source of the pollution and the distance are used to determine environmentally sensitive points.The AERMOD atmospheric prediction model is used to predict the concentration of major pollution sources per month,and the daily average daily value for 2017 is obtained.There are 12 data for each pollution source.Then the research on the variation law of coal-fired flue gas concentration is carried out,and the reasons such as atmospheric stability,wind frequency,wind speed and geographical distribution of pollution sources are analyzed.There are 4 industrial parks in Qinggang Town,and there are many enterprises in the park.The coal consumption,the distance from the town,the dominant wind direction,and other standard pollution loads were used as the basis for screening five major coal-fired flue gas sources such as the Beijing-Gangzhou Longjiang self-supplied power station.The maximum concentration of each pollution source and the urban layout were used to identify the six sensitive points of the Qinggang County Government.Coal-fired flue gas has the highest contribution rate to NOx in the air in the central part of Qinggang Town,with a contribution rate of up to 17.6%.The largest contribution to NOx in coal-fired flue gas is the Jingliang Longjiang self-supplied power station.The maximum concentration is 2.64?g/m³,and the concentration from October to April is higher than other months.The highest concentration of NOx in coal-fired flue gas in the sixth Qinggang.The contribution rate to SO₂ in the air is up to 16.38%;the contribution rate to PM10 in the air is up to 1.45%.The NO_x contribution of coal-fired flue gas in Qinggang Town has the highest contribution to NO_x in the central air;the coal-fired flue gas SO₂ has the highest contribution rate to SO₂ in the central air;the coal-fired flue gas PM₁₀ has the highest contribution rate to PM₁₀ in the northern air.The average concentration of NO_x and SO₂ in the coal-fired flue gas of Qinggang Town is the highest in winter,with the maximum values being 3.96?g/m³ and 3.79?g/m³ respectively.The average concentration of PM₁₀ in spring is the largest,and the maximum value is 0.35?g/m³.Qinggang No.6 Middle School,Qinggang No.1Middle School and Qinggang No.4 Middle School are sensitive points affected by coal-fired flue gas in Qinggang Town.The NO_X of coal-fired flue gas in Qinggang Sixth Middle is the most affected,with a contribution concentration of 6.75?g/m³;Qinggang No.1 Middle School is most affected by coal-fired flue gas SO₂,with a contribution concentration of 4.77?g/m³;Qinggang No.4 is most affected by coal-fired flue gas PM₁₀,with a contribution concentration of 0.55?g/m³.Jingliang Longjiang self-supplied power station and Jinan Thermal Power contributed the most to the concentration of coal-fired flue gas pollutants in Qinggang Town.