烧结机风箱中烟气排放规律及分析

Emission law and analysis of flue gas in sinter wind boxes

为了研究烧结机各个风箱中烟气的变化规律,选择某400m2烧结机为研究对象,通过使用不同的烟气分析仪器对烧结机48个风箱中的烟气进行检测,得出了大型烧结机不同风箱中烟气温度、负压、流速、烟气成分(包括氧气、二氧化硫、一氧化碳、氮氧化物)等的变化规律;将烧结过程的料层分为6个状态,结合料层状态和风箱烟气参数分析了不同风箱对应的料层状态,解析了各个风箱烟气参数变化与料层状态的关联性和各个参数之间的相关性。可以得出,烟气的负压与流速的变化正相关;烟气温度与二氧化硫质量浓度变化趋势一致;氧气体积分数与一氧化碳、氮氧化物质量浓度变化呈现负相关趋势;一氧化碳和氮氧化物质量浓度变化一致;不同风箱烟气参数变化与风箱对应的烧结料层状态密切相关。

In order to study the variation law of the flue gas in the sinter wind boxes,a 400 m^2 sinter was selected as the research object.The flue gas in 48 wind boxes of the sinter was detected by different flue gas analysis instruments.Variation laws of the flue gas temperature,the negative pressure,the flow velocity,the composition(including oxygen,sulfur dioxide,carbon monoxide,nitrogen oxides)of different wind boxes were obtained.In the sintering process,the material layer was divided into six states.The states of the material layer corresponding to the different wind boxes were analyzed by combining the material layer states and the wind boxes flue gas parameters.Then,the correlation between the flue gas parameters of each wind box and the material layer states and the correlation among the parameters were analyzed.The conclusions are as follows:the negative pressure of the flue gas was positively correlated with the change of the flow velocity;the trend of the temperature was consistent with the sulfur dioxide mass concentration;the change of the oxygen volume concentration was negatively correlated with the carbon monoxide and the nitrogen oxide mass concentration;the variations of carbon monoxide mass concentration and nitrogen oxide mass concentration were same;the variation of flue gas parameters of different wind boxes was related to the state of sintered material layer corresponding to the wind boxes.