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1、 本科毕业论文题目：干熄焦炉内固-气流动及传热数值模拟学 院: 材料与冶金学院专 业: 材料成型及控制工程学 号: 201102131028学生姓名: 明廷勇指导教师: 常庆明日 期: 二一五年六月武汉科技大学本科毕业论文I摘 要干熄焦技术相对传统的熄焦工艺具有节能、环保和提高焦炭质量等优点，在国内外得到了广泛的应用，各大钢厂都非常重视对干熄焦技术的研究。随着干熄焦技术的不断发展，传统的研究方法已不能满足新的工艺要求。本文以某厂140t/h的干熄焦炉为研究对象，建立了干熄焦炉的三维几何模型，采用多孔介质理论建立了干熄焦炉内固-气流动及传热的数学模型。基于FLUENT软件中的多孔介质模型，利用U
2、DS和UDF将FLUENT中的单能量方程改写为双能量方程，模拟干熄焦炉内固-气流动及传热情况，为干熄焦炉提供设计提供依据。在此模型基础上，通过改变气体入口温度和速度，观察气体出口和焦炭出口温度的变化情况，分别分析气体入口风温和入口风速对干熄焦生产工艺的影响。研究发现，气体从底部进入干熄焦炉后在斜道和环形气体发生了偏流，越靠近气体出口，气体流速越大；气体压降主要发生在冷却室，气压在斜道和环形气道达到最低；在炉内同一位置，焦炭温度恒比气体温度高，冷却室周边的换热比中心区域更充分。气体入口风温对干熄焦生产工艺影响不大，气体出口和焦炭出口温度随气体入口风速的增大显著降低。关键词： 干熄焦；多孔介质；
3、FLUENT；数值模拟武汉科技大学本科毕业论文IIAbstractThe Coke Dry Quenching(CDQ) technology have more advantages in energy saving,environmental protection and improving the quality of and coke over the traditional cokequenching process. This technology has been widely used both at home and abroad. And themajor steel mi
4、lls attach great importance to the study of coke dry quenching technology.Withthe continuous development of dry quenching technology, traditional methods can not meettherequirements ofnew challenges.In this paper, a three-dimensional geometric model of a 140t/h coke dry quenching unitis established
5、and a mathematical model for quenching flow and heat transfer between gasand coke is established by using the theory of porous media. Based on the porous mediummodel in FLUENT software, the user defined scalars(UDS) and user defined functions(UDF)are utilized to change single-energy equation into do
6、uble-energy equations, in order tosimulate the solid-gas flow and heat transfer in dry coke quenching ,which can provide a basisfor CDQ design. On the basis of this model, different gas-inlet temperature and velocity aregiven for observing the changes in the gas-outlet and coke-outlet temperature, t
7、o analyze howgas-inlet temperature andvelocity can affect theCDQproduction process .The results show that gas in the chute and ring airway has the drift phenomenon, and thecloser to the outlet, the faster the velocity is; the loss of gas pressure mainly occurred in thecooling chamber, the lowest gas
8、 pressure form in the chute and ring airway; the coketemperature is higher than the gas temperature in any same position of CDQ and thesurrounding of the CDQ has a better heat transfer than the center of it. Gas-inlet temperaturemakes littledifferent of cokedry quenching process, whilethegas-inlet v
9、elocity makes much.Key words: CDQ； Porous medium； FLUENT； Numerical simulation武汉科技大学本科毕业论文III目 录1 绪论.11.1 干熄焦技术.11.2 干熄焦工艺流程.11.3 干熄焦炉内固-气流动及传热的研究现状.31.3.1 前苏联的研究.31.3.2 日本的研究.31.3.3 国内的研究.41.4 课题研究的意义与内容.41.4.1 课题研究的意义.41.4.2 课题研究的内容.52 研究方法-CFD.62.1 FLUENT软件介绍.62.2 FLUENT软件的二次开发.63 干熄焦炉内固-气流动及传热的数学模型.103.1 几何模型.103.2 基本假设.103.3 数学模型.113.4 边界条件.124 模拟结果及分析.134.1 结果分析.134.1.1 干熄焦炉内速度场分析.134.1.2 干熄焦炉内温度场分析.
