烧结烟气污染物脱除的进展

来源期刊：钢铁2010年第12期

论文作者：张春霞 王海风 齐渊洪

文章页码：1 - 11

关键词：烧结烟气； 脱硫； 减排； 钢铁企业

Key words：sintering flue gas； desulphurisation； emission reduction； steel plant

摘    要：烧结工序是硫氧化物、氮氧化物和二恶英类(POPs)的主要排放源。其烟气量大、流量波动大和污染物浓度低,脱除难度很大。中国烧结脱硫刚刚起步,高效、稳定和经济运行的技术还未过关。随着未来中国环保标准越来越严,氮氧化物和二恶英也将是污染控制内容。烧结烟气脱硫是钢铁行业污染减排的重点,减排形势日趋严峻。分析了钢铁企业硫素流来源与走向,介绍了石灰-石膏法、氨-硫铵法、海水脱硫法、氧化镁法、循环流化床法、密相干塔法、MEROS法、NID法和活性炭法等几种典型烧结烟气脱硫技术的工艺原理和优缺点,并列举了现有国内外钢铁企业烧结脱硫方法,指出了未来烧结烟气脱硫、脱硝和脱二恶英的多功能一体化先进技术将是发展方向,同时鼓励副产物资源化高效利用技术的开发。

Abstract: The main origin of the sulphur oxide,nitrogen oxide and dioxin(POPs) was sinter process.It was very difficult to separate the pollutant for the large quantity of exhaust,the fluctuant range of flux and low density of pollutant.The desulfurization was just started in our country and the technique hadn’t been passed with efficient,steady and economical operation.As the environmental protection standard was more and more strict in our country,nitrogen oxide and dioxin will be controlled,too.Sintering gas desulfurization was emphasized in iron and steel industry.SO2 emission reduction was serious.The sulphur flow was analyzed.And process principles,advantage and disadvantage of some typical sintering gas desulphurization technologies,such as limestone/lime-plaster,ammonia-ammonium sulfate,seawater,magnesia,CFB,dense flow absorber,MEROS,NID,active carbon and so on was described.The sinter process desulphurization technologies of steel plant both in China and abroad were listed.The development trend of sintering gas desulfurization was put forward that the technique of separate the sulphur oxide,nitrogen oxide and dioxin would be researched and the by-product efficiently used would be encouraged at the same time.