随着中国对环保的日益重视，SO2的排放浓度也受到严格限制。在中国一些地区，SO2排放浓度限值已要求≤20 mg/m3。因此，电厂、水泥厂等污染型企业必须采取有效措施以控制SO2的排放浓度。目前，脱硫技术主要分为干法脱硫、半干法脱硫以及湿法脱硫等。每种脱硫方法又包括多种工艺。此外，中海油天津化工研究设计院有限公司开发的组合式脱硫技术在水泥厂烟气脱硫方面有着良好的应用。该脱硫工艺具有使用条件宽、建设和运行费用低、脱硫率高的特点，可以实现二氧化硫的超低排放。且该脱硫工艺不会引入钾、钠、氯、硫、磷等有害元素，因而不会影响水泥熟料的生产过程。

With the emphasis of China on environmental issues，the emission concentration of SO2 is strictly limited.In some areas of Chnia，the emission mass concentration limits of SO2 have been required to be less than or equal to 20 mg/m3.There fore，polluting factories such as power plants and cement plants must take effective measures to control the emission concen tration of SO2.At present，the major classification of desulfurization technologies includes dry desulfurization，semidry desul furization and wet desulfurization.There are many technologies for each desulfurization method.In addition，the combined desulfurization technology developed by CenerTech Tianjin Chemical Research and Design Institute Co.，Ltd.has a good app lication in desulfurization of cement plants.The desulfurization process has the characteristics of wide use conditions，low construction and operation costs and high desulfurization rate，which can achieve ultralow emission of sulfur dioxide.More over，the desulfurization process does not introduce harmful elements such as potassium，sodium，chlorine，sulfur and phos phorus etc..Thus it does not affect the production process of the cement clinker.