深圳妈湾电厂烟气脱硫工程对区域SO_2改善作用研究

Research on the Effect of Shenzhen Mawan Power Plant Flue Gas Desulphurization Project on the Improvement of Regional SO_2 Concentraiton at the Atmosphere

深圳妈湾电厂地处海、陆交界,面临大海,背靠起伏不平的山地和台地。为了较准确评估妈湾电厂治理脱硫效果和周围环境质量改善程度,选用合适模型十分重要。结合电厂和深圳市南山区实际情况,选用诊断风场模式与轨道烟流模式相结合的模型,该模型能较细致地反映海陆风转换、流场辐散、辐合时的污染物浓度分布特征,是中、小尺度范围高架连续点源污染物浓度预测较为理想的模型。研究表明:该模型能够在流场复杂、气象条件多变的情况下,预测精度较好;通过预测分析深圳妈湾电厂采取了烟气脱硫工程后对南山乃至深圳宝安地区的大气环境中SO2的改善作用明显。

Shenzhen Mawan Power Plant is located in the boundary between the sea and the land,facing the ocean and backed by undulating hills and terraces.In order to accurately assess the desulfurisation result of the Mawan power plant,also the improvement level of environmental quality of the surroundings,it is very important to choose the appropriate model.Considering the actual situation of both the power plant and Shenzhen Nanshan District,model that combines wind field diagnosis mode and plum track mode was used.This model can detailed reflect distribution features of the pollutant concentration during land-sea breeze conversion,flow field divergence and flow convergence,and ideal model to forecast pollutant concentration of elevated continuous point sources in small and medium scale.The research shows that the forecast accuracy of this model is better under complex flow field and variable weather conditions.The analysis reveals that after taking the flue gas desulphurization project in Mawan power plant,the SO2 concentration at the atmosphere in Shenzhen Nanshan and Baoan District has been significantly improved.