室内试验用橡胶沥青制备设备研究

发布时间：2018-11-27 17:34

【摘要】：橡胶沥青技术是目前世界范围内应用前景十分广阔的一门道路工程材料技术,其之所以受到人们的青睐首先是因为通过这项技术获得的改性沥青具有十分优良的特性,满足了人们对普通沥青提出的改性要求,其次是生产橡胶沥青所使用的胶粉来源于废旧轮胎等,为这类废旧橡胶制品的废物再利用提供了一种有效解决途径,一举两得。任何的工程技术都离不开工程装备作为基础与支持,橡胶沥青也不例外,目前对于橡胶沥青制备设备的研究与开发多集中在大型的生产设备,而小型化的试验用设备鲜有人涉足,但是对于改性沥青的研发来说,最重要的就是试验环节,如果此时没有专业的试验用制备设备提供保障,那么试验效果将会是事倍功半。所以,当前十分有必要对这类小型化的试验用制备设备展开研究。本文在实地调研与阅读文献的基础上,总结当前试验用制备设备的不足体现在三方面,即:加热、搅拌、通风净化。本文将以上述三个方面为研究方向,采用理论分析、计算机模拟与试验验证相结合的方式展开研究。加热方面,通过对各种常用加热方式的特点以及局限性进行分析后,采用电磁加热作为沥青的加热方式,并利用ANSYS进行仿真,得到了不同参数下容器壁上的磁场、涡流及温度分布云图,确定了适宜的激励电流与激励频率范围。搅拌方面,通过查阅文献资料,选择了六叶盘式涡轮搅拌器,并对挡板、搅拌器尺寸、搅拌位置、粘度、胶粉粒径、搅拌转速对胶粉分布的影响及叶片在预应力下的模态响应做了模拟研究。通风净化方面,通过对通风的控制方式、气流组织方式的认真研究以及对各种空气净化方法的特性的对比优选,结合实际应用场合,选择全面通风并采用下送上排的气流组织方式,净化方法采用以活性炭为吸附剂的吸附法,然后对容器的三种常用位置下的通风过程进行了模拟。最后,针对三个方面分别设计了一个验证性的试验,通过试验验证了设计的有效性,并借助于试验现象及得出的试验数据对其性能有了更实际、更直观的了解。
[Abstract]:Rubber asphalt technology is a widely used road engineering material technology in the world at present. The reason why it is favored by people is that the modified asphalt obtained by this technology has very good characteristics. The rubber powder used in the production of rubber asphalt comes from waste tires, which provides an effective way to reuse the waste of this kind of waste rubber products and can kill two birds with one stone. Any engineering technology can not be separated from engineering equipment as the foundation and support, and rubber asphalt is no exception. At present, the research and development of rubber asphalt preparation equipment is mostly focused on large-scale production equipment. But for the research and development of modified asphalt, the most important is the test link, if there is no professional experimental equipment to provide protection, then the test effect will be half the effort. Therefore, it is necessary to study this miniaturized experimental preparation equipment. On the basis of field investigation and reading literature, this paper summarizes the shortcomings of the present experimental preparation equipment in three aspects: heating, stirring, ventilation and purification. In this paper, the above three aspects will be taken as the research direction, and the research will be carried out by means of theoretical analysis, computer simulation and experimental verification. In the heating aspect, after analyzing the characteristics and limitations of various common heating methods, electromagnetic heating is used as the heating method of asphalt, and the magnetic field on the wall of the vessel under different parameters is obtained by ANSYS simulation. The suitable excitation current and frequency range are determined by cloud diagram of eddy current and temperature distribution. In the aspect of stirring, by consulting the literature, the six-leaf disk turbine agitator is selected, and the baffle, agitator size, stirring position, viscosity, rubber particle size, The influence of stirring speed on the distribution of rubber powder and the modal response of blade under prestress were simulated. In the area of ventilation purification, through the careful study of the control mode of ventilation, the way of airflow organization and the comparison and optimization of the characteristics of various air purification methods, combined with the practical application situation, In this paper, the overall ventilation was selected and the air flow organization was adopted, and the adsorption method with activated carbon as the adsorbent was used to purify the vessel. Then the ventilation process in three common locations of the container was simulated. Finally, a confirmatory test is designed for the three aspects, and the validity of the design is verified by the experiment, and its performance is more practical and intuitionistic with the help of the experimental phenomena and the experimental data obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U414

【参考文献】