焦化项目大气污染特征及环境影响评价

Characteristics and Environmental Impact Assessment of Atmospheric Pollution from Coking Project

以甘肃省酒泉市阿克塞哈萨克族自治县某焦化项目为案例,在分析其工艺流程和排污环节的基础上,利用AERMOD模型定量预测评价该焦化项目对区域大气环境质量的影响程度。预测结果表明:SO2,NO2,NH3,H2S的区域最大地面小时质量浓度占标率分别为15.8%,29.6%,16.8%,24.8%;SO2、NO2、苯并[a]芘、固体悬浮物(TSP)的区域最大日均质量浓度占标率分别为7.5%,11.4%,7.2%,95.8%;TSP最大日均质量浓度坐标点为(500,0),位于厂界内部,高浓度是由焦化厂低矮面源造成的,且浓度随距离消减得较快。

Taking a coking project in Gansu province as an example,the technological process and the pollutant sources were analyzed,and the impact of the coking project on regional atmospheric environmental quality was quantitatively predicted and evaluated using the AERMOD model. The prediction results show that：The maximum ratio to standard of the Regional daily average concentration of SO2,NO2,NH3,H2 S is 15.8%,29.6%,16.8%,24.8% respectively;The maximum ratio to standard of the regional hourly average concentration of SO2,NO2,BaP,TSP is 7.5%,11.4%,7.2%,95.8% respectively;The coordinate of maximum regional daily average concentration of TSP is at（500,0）,located in the factory bound. The high concentration is caused by the low non-point sources of the coking plant, and the concentration is rapid reduced with the distance.