水泥窑协同处置垃圾衍生燃料对NOx和SO2生成转化的影响

利用水泥窑协同处置垃圾衍生燃料是目前发展趋势之一,但实际处置过程中存在着污染物排放不稳定的问题,因此本文以湖北某水泥厂处置的垃圾衍生燃料为研究对象,利用高温管式炉开展试验,研究了五种垃圾衍生燃料在500～900℃的燃烧环境下燃烧产物NOx、SO2的释放特点.试验结果表明:垃圾衍生燃料在不同温度下燃烧过程中NOx的浓度峰...

Effect of Cement Kiln Collaborative Disposal of Refuse Derived Fuel on Generation and Transformation of NOx and SO2

It is one of the developing trends to utilize cement kiln to co-dispose refuse derived fuel (short for RDF). But in the process of actual disposal, there exists the problem of unstable pollutant discharge. Hence, five kinds of RDF treated by a cement plant in Hubei province were taken as the research objects. The high-temperature tubular furnace was used to carry out experiments to study the generation and transformation of NO_x and SO₂ at 500~900 ℃. The experimental results show that in the process of RDF combustion the peak concentration of NO_x is more affected by temperature at low temperatures (500~600 ℃), which increases multiply with temperature; the peak concentration of NO_x is less affected at high temperatures (700~900 ℃). At 900 ℃, the NO_x conversion rate is low and the combustion rate is fast, so it’s the suggested temperature to dispose of RDF. In the combustion process of different RDF, the conversion rate of NO_x shows an “inverted V shape” with the changing of combustion temperature, while the conversion rate of SO₂ shows a “positive V shape” with the change of combustion temperature. The NO_x and SO₂ play a mutual inhibition role in the formation process.