煤是一种复杂的化合物,当煤燃烧时一部分细微颗粒物随烟气排往烟道,称为烟尘或粉煤灰。粉煤灰的产生主要集中在火电厂和大型工矿企业的动力锅炉上,是目前世界上排放量最大的工业废料之一,主要堆积于贮存场,由于我国燃烧用煤含灰分较高,所以排出的粉煤灰量很大。目前,我国贮灰库的环境安全存在漏洞,当遇到贮灰库坍塌、粉煤灰外泄时,易引起次生环境事件,直接威胁群众饮用水源安全。2006年两起贮灰库坍塌次生粉煤灰污染事件中,由于污染物下泄,导致大面积农田被掩埋,河流水质受到很大的影响,造成附近的环境污染,特别是对农田浇灌水以及饮用水的污染,严重影响农产品质量,危害了群众身体健康。这两起事件虽然得到了妥善处置,但是贮灰库引起的环境安全隐患必须引起足够重视。 Coal is a complex compound that is emitted as fine particles of flue gas into flue gas as coal dust or fly ash. Fly ash is mainly produced in power boilers of thermal power plants and large-scale industrial and mining enterprises. It is one of the largest industrial wastes in the world at present, and is mainly accumulated in storage yard. Due to the high ash content of coal in our country, coal ash is discharged The amount of fly ash is very large. At present, there are loopholes in the environmental safety of the ash storage in our country. When encountering the collapse of the ash storage and the release of fly ash, it is easy to cause secondary environmental events and directly threaten the safety of drinking water sources for the masses. In 2006, two ash storage silos collapsed secondary fly ash pollution incidents, due to the release of pollutants, resulting in a large area of ​​farmland was buried, the river water quality is greatly affected, resulting in the nearby environmental pollution, especially for irrigation of farmland and water Drinking water pollution, seriously affecting the quality of agricultural products, endangering the health of the masses. Although these two incidents have been properly disposed of, the environmental safety hazard caused by the ash storage warehouse must be given enough attention.