RESEARCH ON CHANGING TREND OF COAL CONSUMPTION IN PROVINCIAL CAPITAL CITY BASED ON THE DATA OF ENVIRONMENTAL STATISTICAL INVESTIGATION

Coal is the main energy source in China. It is very important to analyze the changing trend of coal consumption in order to predict the emission of carbon dioxide and air pollutants. Based on the National Environmental Statistics Survey data, this paper analyzed the utilization of coal consumption in major cities from 2011 to 2018, as well as the coal consumption trends of industrial sources and living sources by clustering analysis of provincial capitals in China using the thermodynamic clustering map, and according to the eastern cities, central cities and western cities for regional comparison of coal consumption. The following conclusions were drawn: through cluster analysis, it was found that there was a certain similarity in the base and changing trend of the total coal consumption of industrial enterprises among the cities in the same cluster. Overall, the coal consumption of urban industrial enterprises showed a decreasing trend year by year. The total coal consumption of eastern cities was higher than that of central and western cities, and the decline of coal consumption in the eastern cities was generally better than that in the central and western cities. Except for a few cities such as Beijing, the annual coal consumption in the power and heat production and supply industries did not changed much. The trend of coal consumption of urban living source was decreasing year by year generally, and it was increasing in the west, decreasing in the east and the middle. The coal consumption peaking in eastern cities was better than that in central and western cities.