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氮氧化物是大气主要污染物之一,是造成酸雨和光化学烟雾的主要原因。阐述燃煤锅炉NOx的生成机理及控制原则,介绍后石电厂600MW机组采用的PM型低NOx燃烧器和分级燃烧三菱燃烧技术,该技术在实现分级送风降低氮氧化物排放方面有许多独到之处,特别是布置了与主燃烧器组间隔较远的燃烬风喷口,对节约SCR脱销运行成本和降低对大气NOx排放,取得较好效果。
Nitrogen oxides are one of the major pollutants in the atmosphere and are the main cause of acid rain and photochemical smog. Describes the formation mechanism and control principle of NOx in coal-fired boilers, and introduces the PM low NOx burner and the staged combustion Mitsubishi combustion technology adopted by the 600MW unit in Houshi Power Plant. This technology has many unique features in achieving staged air supply and reducing nitrogen oxide emissions Department, in particular, arranged with the main burner group farther away from the ember ash nozzle to save SCR out of running costs and reduce NOx emissions to the atmosphere, and achieved good results.