Abstract:
Coal utilization is the main source of air pollutants in China.Coal is used as fuel in civil coal fired,industrial boiler and power plant,but in the field of coal chemical industry as a raw material.According to scholars’ study on coal utilization pollutants emission in China,we compared the pollutant emission intensity of different products,and get the following conclusions:Reduce the use of civilian bulk coal,or be replaced by briquette or low emission fuel to cut down the air pollutants emissions;Strengthening the dust removal of industrial boilers and the denitration of electric power to reduce particulate matter and NO
X emissions;In the coal coking industry,we should comprehensively promote the desulfurization and dust removal technology;The CO
2 emission intensity of modern coal chemical industry is greater,and attention should be paid to the capture and utilization of CO
2,but it's other pollutants emission intensity is better than that of other coal utilization fields.According to the pollution emission coefficient and its coal consumption,we compared the coal pollutant emission intensity in different application fields:Coal is used as fuel,and its carbon is almost completely converted to CO
2;but as raw material,part of its carbon is transferred to the product.And,its other pollutants emissions are also much lower than the emissions as fuel.The coal emission factors of NO
X,SO
2 and particulates are respectively highest in thermal power,industrial boilers,civil coal combustion and coking industries,we should strengthen the denitration,desulfurization and dust removal projects in these areas correspondingly.