| The thermal power industry is one of the high-polluting industries in China,and its impact on the environment is a concern for researchers and environmental protection departments.In recent years,many studies have accurately and detailedly described the current situation and characteristics of pollutant emissions from China’s thermal power industry and their impact on the environment through the construction of evaluation indicator systems and emission inventories,achieving certain results.However,there are still some shortcomings in current research,such as the evaluation indicator system mainly consisting of qualitative indicators and a small number of evaluation indicators.The construction of the thermal power industry emission inventory using online monitoring system(CEMS)data is difficult,which poses certain obstacles to the establishment of high spatiotemporal resolution thermal power industry emission inventories.This study conducted relevant research to address the above issues,and the research content and conclusions are as follows:(1)The environmental impact assessment documents of thermal power construction projects in China are collected and sorted out.According to the principles of index system construction,combined with the results of literature investigation and principal component analysis method,the index system of atmospheric environmental impact assessment of thermal power industry including 7 primary assessment indicators and 23 secondary assessment indicators is constructed.The weight order of primary indicators in the evaluation system is determined as follows:fuel nature(0.203),pollutant emission characteristics(0.149),cleaner Production(0.142),basic information of construction projects(0.136),resource consumption(0.127),exhaust gas treatment(0.126)and flue gas outlet design(0.116).The five most weighted indexes in the secondary indexes are coal sulfur content(0.0684),smoke emission(0.0669),smoke emission emission per unit power generation(0.0630),chimney outlet diameter(0.0625)and dust removal efficienc(0.0612),indicating that the design of the above index parameters is closely related to the influence of thermal power construction project on atmospheric environment.(2)Using the data from the environmental impact assessment report as the main data,selecting the data that reflects the activity level of thermal power construction projects and the measures for controlling flue gas emissions,and constructing the 2017 Shandong Province thermal power industry emission inventory.A total of 82 thermal power plants in Shandong province were included in the emission inventory in 2017,including geographical location information and pollutant emission intensity levels.The total capacity of the thermal power plant in emission intensity Shandong thermal power in 2017 is 83423MW,the total power generation is 48.253 billion kW-h,and the total coal consumption is 18.845 billion t,which is in line with the statistical data published by Shandong Province,indicating that the constructed emission inventory has high accuracy;(3)The topographic data,land use data,meteorological monitoring data and monitoring data of national air quality control stations of Shandong Province in 2017 were sorted out.The weather forecast model WRF meteorological data was used as a substitute for sounding data,and the constructed Shandong thermal power inventory data was input into the medium-scale air quality model CALPUFF to study the impact of Shandong thermal power industry on ambient air quality.The results show that the contribution of the thermal power industry in Shandong Province to the average annual concentration of the three air pollutants(SO2,NOx and PM10)is 0.19～1.18 μg/m3,0.76～3.08 μg/m3 and 0.23～0.91 μg/m3,respectively.The correlation coefficients of the three pollutants are 0.89,0.68 and 0.68,respectively.The contribution to the monthly average value of state-controlled stations is related to geographical location.The eastern coastal cities have lower pollution in autumn and higher in winter,while inland cities have higher pollution in autumn and winter.(4)In the study,the thermal power industry in Jinan,Jining and Zibo of Shandong Province was simulated.The monthly average values of pollutant concentrations in the three key urban areas are close to the trend of collected monitoring data,which is consistent with the results of local meteorological data and backward trajectory analysis;Among the three key urban areas,the contribution of Jining’s thermal power industry to local pollutant concentration accounts for more than 30%of the total contribution of Shandong province’s thermal power industry to Jining’s pollutant concentration,followed by Jinan(9.09～25.16%)and Zibo(9.35～20.90%).(5)To quantify the effects of emissions from thermal power industry in Shandong Province on population health by means of average daily exposure dose and exposure relative risk index.The average daily exposure dose change caused by emissions from the thermal power industry in Shandong Province is 1.00～5.90%(SO2),1.93～7.70%(NOx)and 0.40～1.52%(PM10)of the average daily exposure dose corresponding to the primary air quality standard.The grid numbers of the three pollutants in different risk grades are similar,and the spatial distribution of the exposure relative risk evaluation index is basically similar.The area with the exposure relative risk evaluation index less than 1 in Shandong Province is relatively stable,corresponding to the three pollutants of 59.27%(SO2),60.73%(NOx)and 60.0%(PM10),respectively. |
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