基于山区水文地质条件下燃煤电厂贮灰场地下水生态环境影响预测

基于我国以煤炭为主的能源结构,火力发电厂仍然在发电领域占有绝对的统治地位。但与此同时,火力发电的副产品粉煤灰堆放问题日益成为社会性问题。由于京津冀地区空气和地下水污染防控的巨大压力,环保问题成为困扰电厂灰场的一大问题。通过对石家庄井陉某大型火力发电厂灰场(灰渣体积31×10~4m^3)的地下水资料收集、现场调查、水质检测、数据分析预测,对井陉地区水文地质条件进行模型概化,用数值模拟的方法预测灰场特征污染物氟化物和六价铬的污染运移情况,探讨分析了灰场污染物泄漏进入地下水环境的迁移范围和影响程度,认为该灰场地下水对周边环境影响很小,从而对灰场的地下水生态环境保护提供指导作用。

Prediction of groundwater ecological environmental impact in ash storage site of coal-fired power plant based on hydrogeological conditions in mountain areas

Based on China''s coal-based energy structure,thermal power plants still occupy an absolute dominant position in the field of power generation. But at the same time,the problem of fly ash stacking,a by-product of thermal power generation,has increasingly become a social problem. Due to the huge pressure of air and groundwater pollution prevention and control in Beijing,Tianjin and Hebei,environmental protection has become a major problem that plagues the ash yard of power plants. Based on groundwater data collection,field investigation,water quality detection and data analysis and prediction of a large thermal power plant ash yard in Shijiazhuang,the hydrogeological conditions in Jingxing area are generalized. The pollution transport of fluoride and hexavalent chromium in ash yard is predicted by numerical simulation,and the migration of pollutants leaking from ash yard into groundwater environment is discussed and analyzed. The scope and degree of influence can provide guidance for the protection of groundwater environment in ash field.