燃煤锅炉烟气脱硫技术的研究分析

本文综述了我国锅炉烟气脱硫技术研究历史、现状及近年来引进的烟气脱硫技术示范工程应用情况，分析了各种烟气脱硫技术的特点及存在的不足，提出了对于大型电站燃煤锅炉，可采用石灰石／石膏回收法等先进的烟气脱硫装置，但投资大；对于大量的中小型燃煤锅炉，由于烟囟较低，其排放的二氧化硫对地面的贡献率高达45％，急需研究开发一种价格适，脱硫效果达标，适合中国国情的实用烟气脱硫装置，推动我国的燃煤锅炉烟气脱硫技术的发展。

On the technologies for the flue-gas desulfurization on coal-fired boilers

In recent years, rapid development in energy and power industry in China has led to significant increase of sulfur dioxide emission for lack of appropriate technology of desulfurization in coal-fired power plants and on boilers in industrial plants. In this paper, the development of FGD technologies and domestic applications of FGD equipment were summarized. On the basis of this, it was concluded that the wet method has been most widely used due to its high efficiency of FGD and possibilities of byproduct utilization in spite of the high initial cost and operating expense of the system. The wet method is therefore suitable for coal-fired boilers in utility-type units. For small and medium coal-fired boilers, it is necessary to develop new FGD systems of moderate costs, which are suited to national conditions in China and can meet the requirements of the emission standards of SO2.