水泥工业NO_X排放控制探讨

Comments on NO_X emission abatement in cement industry

氮氧化物是化石燃料在燃烧过程中形成的。由于其特殊的形成机理,如何降低NOX排放是一项复杂的工作.火电厂NOX控制的燃烧技术已较为成熟,水泥窑炉与电厂锅炉有较大区别.本文就水泥窑炉的特点结合电厂锅炉的一些经验,阐述了水泥工业氮氧化物排放控制技术的现状,分析了低NOX燃烧器、分解炉及分级燃烧技术的各自优点及局限性,介绍了几种烟气脱硝技术,最后提出高固气比分解炉及合理组织分解炉燃烧是水泥工业有效控制NOX排放的技术措施.

The formation of nitrgen oxide is derived from fossil fuel combustion. To decrease the NOx emission is a complex work because of its special formation mechanism. The NOx Control of combustion technology in power station comes to maturity relatively. The cement kiln is different from the boiler in power station. Combined with the experience of power station and depending on the character of the cement kiln, the status of the NOx control tecnology in cement industry was described. Both of merits and demerits of the low NOx burner, caliciner and staged combustion technology were analyzed. Several flue-gas denitration techniques were introduced. At last, the rational organized burning for coal powder in caliciner are recomncended as effective measure to control NOx emission.