油泥燃烧特性的试验

发布时间：2018-04-25 01:18

本文选题：燃烧特性 + 油泥　；参考：《环境化学》2017年07期

【摘要】：本文利用热重红外联用配合同步差热分析实验台和小型鼓泡流化床实验台共同研究了油泥的燃烧特性.由热重红外联用和同步差热分析研究发现,油泥的着火温度较低,燃尽较容易,油泥在热解过程中,轻质烃的析出开始于425 K,重质有机成分在600—800 K析出显著,油泥燃烧过程中主要放热阶段位于550 K以上发生的重质有机成分的分解和燃烧.鼓泡流化床燃烧实验结果发现,典型的油泥鼓泡流化床燃烧分为3个阶段:挥发分剧烈燃烧,挥发分弱燃烧和固定碳燃烧.通过热平衡计算得出鼓泡流化床油泥燃烧稀相区和密相区的燃烧比,结果表明稀相区的油泥燃烧比高达80.5%,稀相区是主要的燃烧放热区域,该区域发生的反应是重质有机成分的分解和燃烧.因此,在实际流化床锅炉中,对气相燃烧组织和炉内热量分布需要做特殊考虑.
[Abstract]:In this paper, the combustion characteristics of oil sludge were studied by means of thermogravimetric infrared (TIR) combined with synchronous differential thermal analysis (DTA) and small bubbling fluidized bed (BFB). The results of thermogravimetric infrared spectroscopy and simultaneous differential thermal analysis show that the ignition temperature of the sludge is lower and the burnout is easier. During the pyrolysis of the sludge, the precipitation of light hydrocarbons begins at 425K, and the heavy organic components precipitate significantly at 600-800K. Decomposition and combustion of heavy organic components occurring above 550 K in the main exothermic stage of sludge combustion. The experimental results of bubbling fluidized bed combustion show that the typical oil slurry bubbling fluidized bed combustion is divided into three stages: volatile violent combustion, volatile weak combustion and fixed carbon combustion. Through the calculation of thermal equilibrium, the combustion ratio between the dilute phase region and the dense phase zone in the bubbling fluidized bed is obtained. The results show that the combustion ratio in the dilute phase region is as high as 80.5, and the dilute phase region is the main region of combustion heat release. The reaction in this region is the decomposition and combustion of heavy organic components. Therefore, in the actual fluidized bed boiler, special consideration should be given to the gas phase combustion structure and the heat distribution in the furnace.
【作者单位】：浙江省能源集团有限公司科技工程与服务产业分公司;浙江大学能源清洁利用国家重点实验室;浙江浙能技术研究院有限公司;
【基金】：国家自然科学基金(51336008)资助~~
【分类号】：X74

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