锅炉烟气联合脱硫脱氮技术

硫氧化物和氮氧化物是燃煤锅炉排放的主要污染物 ,传统分步脱硫脱氮设备昂贵且效率不高 ,而联合脱硫脱氮技术具有很大的优越性 ,如可以减小系统的复杂性、具有更好的运行性能、较低的成本及较小的占地面积 ,因此实现在一个系统内同时脱硫脱氮的工艺成为国内外烟气净化技术的研究重点。对近年来国内外各种联合脱硫脱氮技术的脱除原理、研究现状、应用情况和主要优缺点进行了论述 ,并对各工艺的经济技术指标给予了多方面的比较。通过对两类烟气联合脱硫脱氮技术 (炉内联合脱除和烟气中联合脱除 )的分析、综合和比较 ,找出了我国今后脱硫脱氮技术的研究重点 ,从而为脱硫脱氮技术的进一步开发和改进提供参考

Combined removal technology for SO2/NOx from flue gas

The main pollutants from coal fired power plants are SO 2 and NO x .Equipment for desulfurization and denitrification step by step are expensive and have a lower efficiency.Comparing with them,combined removal technology of SO 2 and NO x have great advantages,such as, the simplified complication, better operation property, lower cost and less using area. So combined removal of SO 2 and NO x in one system become the keystone in the research of cleancomplicationing technology.This paper makes a detailed introduction about combined removal technology of SO 2 and NO x lately in China and other countries,including removal principles,main advantages and defects, the present situation and application of the technology.The contrast of economic and technical standard is given.Through analysis and comparison of two kinds of technology combined removal of SO 2/NO x in boiler and in flue gas, the key of research in future is found out.