Chin Sungmin, Jurng Jongsoo, Lee Jae-Heon, Hur Jin-Huek
Department of Mechanical Engineering, Graduate School of Hanyang University, Seoul 133-791, Korea.
Waste Manag. 2008 Dec;28(12):2684-9. doi: 10.1016/j.wasman.2008.01.004. Epub 2008 Mar 5.
Pilot-plant experiments were performed to evaluate the effect of oxygen enrichment on the co-incineration of MSW and organic sludge from a wastewater treatment facility. Combustion chamber temperatures, stack gas concentrations, i.e., CO(2) and CO, and the residual oxygen were measured. The maximum ratio of organic sludge waste to total waste input was 30 wt.%. Oxygen-enriched air, 22 vol.% (dry basis) oxygen, was used for stable combustion. As the co-incineration ratio of the sludge increased, the primary and secondary combustion chamber temperatures were decreased to 900 and 750 degrees C, respectively, approximately 100 degrees C below the proper incineration. However, if the supplied air was enriched with 22 vol.% (dry basis) oxygen content, the incinerator temperature was high enough to burn the waste mixture containing 30 wt.% moisture sludge, with an estimated heating value of 6.72 MJ/kg. There are two main benefits of using oxygen enrichment in the co-incineration. First, the sensible heat can be reduced as the quantity of nitrogen in the flue gas will be decreased. Second, the unburned carbon formation is reduced due to the oxygen-enriched burning of the waste, despite an increase in the sludge co-incineration ratio.
进行了中试实验，以评估富氧对城市固体废物（MSW）与来自废水处理设施的有机污泥共焚烧的影响。测量了燃烧室温度、烟囱气体浓度，即二氧化碳（CO₂）和一氧化碳（CO）以及残余氧气。有机污泥废物与总废物输入的最大比例为30重量%。使用含氧量为22体积%（干基）的富氧空气来实现稳定燃烧。随着污泥共焚烧比例的增加，一次燃烧室和二次燃烧室的温度分别降至900℃和750℃，比适当焚烧温度低约100℃。然而，如果供应的空气中氧气含量富集至22体积%（干基），焚烧炉温度就足以燃烧含有30重量%水分污泥的废物混合物，其估计热值为6.72兆焦/千克。在共焚烧中使用富氧有两个主要益处。首先，由于烟道气中氮气量减少，显热可降低。其次，尽管污泥共焚烧比例增加，但由于废物的富氧燃烧，未燃碳的形成减少。
