燃煤电厂贮灰场中铬的转化迁移规律研究

Study on the Change and Remove of Chromium and its Prevention Control Countermeasure

通过对物料分析测试、模拟粉煤灰淋溶试验等,分析了燃煤电厂粉煤灰贮灰场中铬的来源及其迁移转化规律。结果表明:燃料煤是铬的主要来源,占92.24%,粉煤灰中的铬几乎均以Cr6+形式存在,经过大气降水、冲灰水淋溶后下渗,将对地下水造成严重污染。

Through the methods of analysis and test on raw materials and the simulated test of drip and dissolve on coal ash, this article analyzed the origination of chromium and the remove and change laws of it. The result indicates the most chromium came from fuel coal, account for 92. 24%, and almost all of chromium in coal ash existed in form of Cr6＋. After the dripping and dissolving action caused by rainfall or ash washing water, and seeping into the groundwater, a serious Cr6＋ pollution will come into being.