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Evaluation on the oxy-fuel combustion behavior of dried sewage sludge

机译：干燥污泥的氧燃料燃烧行为评价

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摘要

The combustion behavior of sewage sludge under oxy-fuel condition was evaluated based on a thermal analysis technique. At heating rates of 20-80 K min(-1), the ignition temperatures of the sewage sludge were between 250 and 300 degrees C under air and three O-2/CO2 atmospheres (oxygen contents of 21%, 30% and 40%). The burning process of the sewage sludge in air was very similar to 30%O-2/70%CO2 atmosphere. The ignition and burnout temperatures of the sewage sludge decreased with increasing oxygen contents in O-2/CO2 atmospheres. The average comprehensive performance indices of the sewage sludge in 40% O-2/60%CO2 atmosphere were about 2 times more than that in 21%O-2/79%CO2 atmosphere. Moreover, the ignition and comprehensive performance indices of the sample sharply rose up with increasing heating rates. The ignition and comprehensive performance indices of the sewage sludge in 30%O-2/70%CO2 atmosphere at 80 K min(-1) were about 4 times and 6 times more than that at 20 K min(-1). The kinetic parameters in four combustion stages around two peaks were evaluated based on the Coats-Redfern method coupled with Ozawa-Flynn-Wall equation. There were certain kinetic compensation effects for both main combustion stages and different oxygen contents in oxy-fuel. (C) 2016 Elsevier Ltd. All rights reserved.
机译：基于热分析技术评估了含氧燃料条件下污泥的燃烧行为。在20-80 K min（-1）的加热速率下，污泥的着火温度在空气和三个O-2 / CO2气氛下（氧气含量分别为21％，30％和40％）在250至300摄氏度之间。 ）。空气中污水污泥的燃烧过程与30％O-2 / 70％CO2气氛非常相似。随着O-2 / CO2气氛中氧气含量的增加，污水污泥的着火和燃尽温度降低。在40％O-2 / 60％CO2大气中，污水污泥的平均综合性能指数约为21％O-2 / 79％CO2大气中的平均综合性能指数的2倍。此外，样品的着火和综合性能指标随着加热速率的增加而急剧上升。在80 K min（-1）下30％O-2 / 70％CO2气氛下的污泥的着火和综合性能指标分别是20 K min（-1）的4倍和6倍。基于Coats-Redfern方法与Ozawa-Flynn-Wall方程相结合，评估了两个峰值附近四个燃烧阶段的动力学参数。对于主燃烧阶段和含氧燃料中不同的氧含量都有一定的动力学补偿作用。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2016年第15期|129-138|共10页
  • 作者

    Niu Shibo; Chen Meiqian; Li Yang; Xue Feng;

  • 作者单位

    Beijing Jiaotong Univ, Inst Thermal Engn, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China|Beijing Key Lab Flow & Heat Transfer Phase Changi, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Inst Thermal Engn, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China|Beijing Key Lab Flow & Heat Transfer Phase Changi, Beijing 100044, Peoples R China;

    Beijing Jiaotong Univ, Inst Thermal Engn, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China|Beijing Key Lab Flow & Heat Transfer Phase Changi, Beijing 100044, Peoples R China;

    Guodian Sci & Technol Res Inst, Nanjing 210033, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Combustion; Sewage sludge; Oxy-fuel; Heating rate; Kinetics;

    机译：燃烧;污水污泥;含氧燃料;加热速率;运动学;

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