粉煤灰及其改性在烟气脱硫方面的研究进展

摘要

According to the composition of fly ash, the physical and chemical properties, its modified mechanism and the method were summarized, and its main application in flue gas desulfurization was introduced. Fly ash directly using the desulfurization activity was low, the effect was not ideal, the fire on the wet or modified can inspire the hidden in the internal activity, the desulfurization rate increased. Preparation of good selectivity and high adsorption capacity, high adsorption efficiency of SO2 adsorbent by using fly ash from coal combustion exhaust system, SO2 , processing waste by waste, was the trend of future development.%根据粉煤灰的组成成分、物理性质和化学性质,综述了其改性的机理和方法,并介绍了其在烟气脱硫方面的一些主要应用。粉煤灰直接利用时其活性低,脱硫效果不理想,通过火法或者湿法对其改性处理后,能激发其潜藏在内部的活性,使脱硫率提高。利用粉煤灰制备出选择性好、吸附容量大、吸附效率高的SO2吸附剂,脱除燃煤废气SO2,以废制废,是未来发展的趋势。