【作者】 王鑫；

【导师】 贺尚红； 唐修俊；

【作者基本信息】 长沙理工大学 ， 机械工程， 2012， 硕士

【摘要】 作为沥青路面机械化施工的关键设备，沥青混凝土搅拌设备已经被广泛用于公路建设，并随着公路建设的快速发展，设备的需求量不断增加，但同时也对产品的性能提出了更高的要求，因为其运行状况的好坏不仅影响着道路的摊铺质量与施工的进度，而且对能源高效利用、减少对环境的污染有着重要的意义。本文主要进行以下几个方面的研究：1.概述国内外沥青混凝土搅拌设备的发展状况以及现有的生产技术，并且结合我国国情，给出适合我国施工建设的沥青混凝土搅拌设备及相关技术。2.介绍了沥青烘干加热系统各部分的结构和工作原理以及烘干加热系统的匹配问题。3.分析烘干滚筒骨料平衡问题，并对燃烧过程进行计算，确定三个工艺区烘干加热所需要的热量及温度、通过筒壁的热量损失、燃料燃烧时的有效利用热量和消耗率及废气排出所带走的热量，并在此基础上计算出烘干滚筒的热效率。4.根据烘干滚筒的热效率并结合骨料在滚筒内的充满率对滚筒的结构参数进行优化，主要包括滚筒的直径、长度和转速，并且分析了滚筒内腔叶片形状和分布的设计方法，燃烧器的选择需要从燃料燃烧的充分性和稳定性以及燃烧温度和油气喷射速度的关系去分析，最后从净化气体量和抽风机的功率的角度为常用除尘器的选择给出较为实用的计算方法，完成整个烘干加热系统的研究分析。结合烘干滚筒的结构参数，利用流体动力学软件Fluent完成了对模型流场的数值模拟，并对模拟仿真结果进行了分析，在理论和软件分析的基础上对参数的设计优化、提高热效率、降低燃油消耗及环境污染有着十分重要的意义。更多还原

【Abstract】 Asphalt mixing plant has been widely used in highway construction as animportant equipment for the mechanized construction of asphalt pavement. Thequantities of asphalt mixing plant are increasing with the rapid development ofhighway construction, but at the same time the quality of product have become moreimportant. Because it’s operational status not only direct impact the quality andprogress of road construction, but also has an important practical significance.Focusing on the following aspects:1. Summary the development and existing production technology of asphalt mixingplant domestic and foreign and combining the situation of our country.Putting forwardthat which kind of equipment is more suitable for construction in our country and therelated technology.2. Describe the structure and working principle of the asphalt heating system andput forward the problem that the matching of the dry heating system.3. Analysis the aggregate balance and then calculate the combustion process todetermine the heat of the three technology areas and the temperature, the heat lossthrough the tube, the effective use and the consumption rate when fuel burns and theheat loss from the exhaust gas, at last calculate thermal efficiency of the drying drum.4. According to the thermal efficiency of the drying drum and combined with thefull rate of the aggregate inside the drum to optimize the structure parameters of thedrying drum, including the roller diameter、volume、length and speed. Analyzing thedesign method of the shape and distribution about the material blades, the choice of theburner should analyze the adequacy and stability of fuel when it’s burning and therelationship about the combustion temperature and the gas jet velocity, at last give thepractical calculation method of the dust collector from the point of view of purificationthe amount of gas and the exhaust fan power.Utilizing the Computational Fluid Dynamics (CFD) simulates the fluid flow basedon the structural parameters of drying drum. There’s a very important significance foroptimized design and improve thermal efficiency through the theory and softwareanalysis.更多还原