由于世界能源消耗逐年增加，作为一次能源的煤摸底的燃烧利用，释放出大量的二氧化硫以及由其形成的区域性酸雨，对环境已造成了严重的污染，它破坏着生态平衡，引起森林大面积积毁灭、土壤湖泊酸化、建筑物腐蚀等。 
因此，控制和减少二氧化硫的排放量是一个十分重要的任务。在众多的脱硫技术中，利用喷雾干燥法脱去烟道气中的二氧化硫是一个越来越受重视的技术。这项技术是在20世纪70年代开始进行研究的，20世纪70年代末已投入商业运行。它投资少、操作简单、除硫效率高、没有二次污染，与烟道气脱硫中大量使用的湿法相比，喷雾干燥法脱硫形成的粉末产品有更大的选择性和开发价值。
喷雾干燥设备技术能否广泛应用的一个重要前提是能否解决干燥后的大量粉末硫酸盐的合理开发利用问题。可以再生作为吸收剂，部分干料可循环使用，作为大地的添充物，转为为膏剂用于水泥的缓凝剂，制成颗粒状的人造砂石，作为建筑材料的填充剂代替常用的混凝土和沥青等。
As the world energy consumption increased year by year, as a primary energy source of coal combustion by thoroughly releasing large amounts of sulfur dioxide, and the formation of regional acid rain on the environment has caused serious pollution, it damaged the ecological balance caused by forest destruction, soil acidification, Lake area building corrosion.
Therefore, the control and reduction of sulfur dioxide emissions is a very important task. In many desulfurization technologies, the use of spray drying method to remove sulfur dioxide in flue gas is a more and more important technology. The technology started in 1970s and was put into commercial operation in late 1970s. It is less investment, simple operation, high efficiency, no sulfur removal two pollution, compared with the use of a large number of wet flue gas desulfurization process, powder spray dry desulfurization formed selectively and develop greater value.
An important prerequisite for the wide application of spray drying equipment technology is whether it can solve the problem of rational exploitation and utilization of large amount of powder sulfate after drying. Can be recycled as absorbent, part of dry material can be recycled and used as fillers to the earth, as retarder for cement paste, made of granular artificial sand, used as a filler in building materials instead of the common concrete and asphalt.
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