窑尾烟气脱硫工艺分析对比及实际应用

Analysis and Comparison of Flue Gas Desulfurization Technology at Preheater and its Practical Application

简述了某公司4000t/d水泥熟料生产线脱硫工程概况,就湿法和半干法脱硫工艺的特点及应用情况进行了比较,详细介绍了脱硫方案的选用原则及该工程选用石灰石-石膏脱硫系统的配置情况。系统投运后,该生产线窑尾主烟囱出口二氧化硫排放浓度降至30mg/Nm^(3),优于国家和山东省最新排放标准。生产线脱硫剂全部采用窑尾回灰,年可节约成本约53万元,副产物脱硫石膏可直接应用于水泥生产,年可造创经济效益约28万元。

This paper briefly describes the general situation of the desulfurization project of a 4000t/d cement clinker production line,compares the characteristics and application of wet and semi-dry desulfurization processes,and introduces in detail the selection principles of desulfurization schemes and the configuration of this desulfurization system.After the limestone-gypsum desulfurization system put into operation,the sulfur dioxide emission concentration at the outlet of the main chimney is reduced to 30mg/Nm3,which is superior to the latest emission standards of both national and Shandong Province.The desulfurizer is the recycled ash from the preheater,which can save about 530000 yuan of cost per year.The by-product desulfurized gypsum can be directly used in cement production,which can create an economic benefit of 280000 yuan per year.