秸秆与油泥混合成型燃料燃烧特性研究

发布时间：2018-04-26 10:17

  本文选题：秸秆 + 油泥　； 参考：《黑龙江八一农垦大学》2017年硕士论文

【摘要】：本文以东北地区常见的玉米秆、水稻秆、豆秆与大庆地区含油污泥为原料混合制取成型燃料,利用等温燃烧方法研究燃烧规律,寻求混合成型燃料燃烧最优参数组合。并通过动力学模型建立燃烧反应动力学模型进行机理验证,对混合成型燃料的污染物排放特性进行了分析,为两种废弃原料的利用提供了思路。本文对玉米秆、水稻秆、豆秆与油泥原料特性进行元素分析、工业分析、发热量分析,通过元素分析得出原料中元素的含量,利用试验方法,深入探索释放出的热能,在原料中添加含油污泥,成型燃料的热值增加单位成本有所减少。燃料氧化过程中产生的化学反应为燃烧研究提供数据依据。针对秸秆与油泥冷压混合成型燃料,以油泥添加比例、燃烧温度、原料粒径为影响因.素,以最大燃烧速率,SO_2排放量作为评价指标,进行单因素试验研究并建立动力学模型,结果表明:油泥比例为5%~15%,燃烧温度为750℃~850℃,原料粒径为8~12mm时,成型燃料燃烧性能较好;得到3种混合成型燃料在不同粒径条件下的反应级数,活化能以及频率因子等参数,由参数可得混合成型燃料的燃烧过程遵循燃烧动力学基本方程,并可用一级反应来描述;其次进行二次回归正交旋转组合试验研究,进一步探索油泥添加比例、燃烧温度、原料粒径大小对燃料燃烧的影响规律,得到最优燃烧参数组合:燃烧温度800℃,油泥混合比例为8%,原料粒径8mm时,混合成型燃料燃烧时最大燃烧速率和SO_2排放量分别为0.0019g/s和57.80mg。应用管式炉燃烧试验装置对混合成型燃料SO_2和NO排放特性进行研究,考察了玉米秆、水稻秆、豆秆与油泥单独燃烧SO_2和NO的排放特性,油泥添加比例和燃烧温度对混合成型燃料燃烧SO_2和NO的排放的影响,结果表明:秸秆与油泥单独燃烧和油泥添加比例对SO_2和NO排放影响均与自身元素含量有关,油泥添加比例与SO_2和NO的转化率之间的关系需要进一步分析,温度是影响混合成型燃料污染物排放的重要因素,随着温度的升高,NO和SO_2的排放量与转化率均有明显的变化。
[Abstract]:In this paper, the common corn stalk, rice stalk, bean stalk and oily sludge in Daqing area were used as raw materials to produce molding fuel. The combustion law was studied by isothermal combustion method, and the optimal combustion parameters were sought. The combustion reaction kinetics model was established to verify the mechanism, and the pollutant emission characteristics of mixed fuel were analyzed, which provided a way for the utilization of two kinds of waste feedstock. In this paper, the characteristics of corn stalk, rice stalk, bean stalk and sludge were analyzed by elemental analysis, industrial analysis, calorific analysis, the content of elements in the raw material was obtained by element analysis, and the heat energy released from the material was deeply explored by means of test method. When oily sludge is added to the raw material, the calorific value of the fuel increases and the unit cost decreases. The chemical reactions produced in the process of fuel oxidation provide data basis for combustion research. In view of the mixture of straw and sludge under cold pressure, the influence factors were the ratio of oil sludge, combustion temperature and particle size of raw material. Taking the maximum combustion rate of so _ 2 emission as the evaluation index, a single factor experimental study was carried out and a kinetic model was established. The results showed that when the sludge ratio was 515%, the combustion temperature was 750 鈩，

本文编号：1805620