The Pollution Contribution Research Of Xigu Petrochemical Industrial Zone To The Main Area Of Lanzhou Based On CALPUFF Model

Xigu petrochemical industrial zone is the main supporting enterprise of Economics and also the main concerning enterprise of environmental protection in lanzhou.Xigu petrochemical industrial zone is carriing out a series of environmental protection measures responsing to the government.Lanzhou’s air quality is gradually improving in recent years,but the overall situation is still not optimistic,heavy pollution weather happens now and then.For comprehening the pollution contribution of Xigu petrochemical industrial zone to the main area of Lanzhou and definiting the main sources in Xigu petrochemical industrial zone,the paper collectes the organized pollution sources of conventional pollution factor in Xigu petrochemical industrial zone in 2015.according to the technical guideline for atmospheric environmental impact assessment(HJ2.2-02008),adaptes AERMOD and CALPUFF model to predict atmospheric environmental impact of Xigu petrochemical industrial zone,and then,according to the amount of the contribution of each pollution source to determine the main pollution sources.at the same time,analysing the environmental impact of the main pollution sources cut and reduction effect in heavy pollution weather,main research work includes the following aspects:(1)Bases on the data of the Emission Declaration of Xigu petrochemical industrial zone in 2015,definites the organized pollution sources of conventional pollution factor in Xigu petrochemical industrial zone.(2)Through the air pollution diffusion model AERMOD and CALPUFF predicts pollution contribution of the organized pollution sources in Xigu petrochemical industrial zone.(3)Through the CALPUFF model calculates the pollution contribution of Xigu petrochemical industrial zone to the main area of Lanzhou.Under definiting the pollution sources,through the model predicts the contribution of each pollution source to the main area of Lanzhou,through the above analysis,draws the following conclusions:(1)Statistics the main point pollution sources in Xigu petrochemical industrial zone.The total statistics of point source pollution is 43,which refinery area is 25, chemical District is 18 and gives pollution source parameters and the corresponding emission parameters.(2)Due to the Lanzhou special topography,diffusion model difference principle and Comparison of predictive results with current monitoring values,the paper identifies the CALPUFF model to predict the the pollution contribution of Xigu petrochemical industrial zone to the main area of Lanzhou.(3)According to the prediction results of CALPUFF model,gets the pollution contribution of Xigu petrochemical industrial zone to the main area of Lanzhou.(4)Gets the pollution contribution of each pollution source for Different main city of Xigu petrochemical industrial zone based on CALPUFF model.(5)According to pollution contribution,determines the main pollution sources in Xigu petrochemical industrial zone.(6)In the heavy pollution weather considering the main sources of pollution decreased by 5% and 10% respectively,and then,the pollution contribution to the main area of Lanzhou has a certain degree of reduction.When the production load is reduced by 5%,the concentration of NOx with accounted for standard rate decreased percentage for 2.52%-4.13%;when the production load is reduced by 10%,the concentration of NOx with accounted for standard rate decreased as a percentage of 5.04%-8.26%.So far,there has no research on the pollution contribution of Xigu petrochemical industrial zone to the main area of Lanzhou for the organized pollution in recent years,the paper can get the contribution of Xigu petrochemical industrial zone,and have important guiding significance in putting forward the corresponding measures for the management and governance.