蛋形辊道窑主体结构的数值模拟研究

发布时间：2018-05-24 23:33

  本文选题：宽截面辊道窑 + 弧形窑顶　； 参考：《景德镇陶瓷学院》2015年硕士论文

【摘要】：辊道窑出现于二十世纪二十年代,到目前为止已经经历了近百个年头,多年来陶瓷辊道窑的能耗问题一直都是研究者最关心的问题,能源消耗也是全球共同关注的话题,所以采取有效的办法来尽量的降低其能耗是对陶瓷辊道窑优化的首要任务。本课题研究是以降低能耗为主线,通过改变辊道窑传统结构模式,提出一种新型辊道窑结构模型,这种新型辊道窑模型的主要特点是窑顶窑底都为弧形,即拱顶拱底的结构,整个窑体是个形似鸡蛋的形状,文中称之为蛋形辊道窑。使用对比分析的方法,探究这种新型模型在烧成带窑内的温度场和气体流场的分布。对比对象是通过建立两种传统模型,一种是弧顶平底结构,一种平顶平底结构,同时分析这两种传统模型烧成带窑内的温度场和气体流场,与课题提出的蛋形窑体内部的温度场和气体流场的分布对比分析,得出课题提出的模型的可行性和优越性本文应用fluent软件,在同等初始边界条件的前提下,对提出的蛋形辊道窑结构和两种传统辊道窑结构的烧成带内部的流场进行了数值模拟,模拟结果通过Tecplot后处理软件处理出三种温度场和速度场的分布云图,进而对其对比分析。分析结果表明：本课题提出的蛋形辊道窑结构可以比传统辊道窑型更好的解决宽体辊道窑内窑炉温差难控制的困扰问题,此新型窑型可以将窑内的温差控制在±5℃以内,更大程度的确保了陶瓷制品的烧成质量。而且此窑型能够更好的保证窑内热量散失,以至可以减少助燃风的风量,高效的降低了烧制所消耗的能量；弧顶弧底同时也增加窑炉内腔的体积,可以满足当今工业上的大产量、宽截面窑炉的应用要求,蛋形结构可以加强窑内气流流动,降低对抽烟风机的抽力要求,节省了电能。
[Abstract]:Roller kiln appeared in the 1920s, and has experienced nearly 100 years so far. For many years, the energy consumption of ceramic roller kiln has always been the most concerned issue for researchers, and energy consumption is also a topic of global common concern. Therefore, the most important task to optimize the ceramic roller kiln is to adopt effective methods to reduce its energy consumption as far as possible. This research is to reduce energy consumption as the main line, by changing the traditional structure model of roller kiln, a new type of roller kiln structure model is put forward. The main characteristic of this new type of roller kiln model is that the bottom of kiln top and kiln is arc, that is, the structure of arch bottom. The whole kiln is an egg-like shape, called egg-shaped roller kiln. The distribution of the temperature field and gas flow field in the firing zone kiln was investigated by using the method of comparative analysis. The object of comparison is to establish two traditional models, one is arc-top flat-bottom structure, the other is flat-top flat-bottomed structure. At the same time, the temperature field and gas flow field in the kiln are analyzed. By comparing and analyzing the distribution of temperature field and gas flow field in the egg-shaped kiln, the feasibility and superiority of the model are obtained. In this paper, using fluent software, under the same initial boundary condition, the feasibility and superiority of the model are obtained. The flow field inside the firing zone of the egg roller kiln and the two traditional roller kiln structures is numerically simulated. The distribution cloud diagrams of the three temperature and velocity fields are processed by Tecplot post-processing software, and then the distribution of the temperature field and velocity field is compared and analyzed. The analysis results show that the structure of the egg-shaped roller kiln proposed in this paper can better solve the problem that the temperature difference of the wide body roller kiln is difficult to control than the traditional one. The new type of kiln can control the temperature difference in the kiln within 卤5 鈩，

本文编号：1931090