摘要随着汽车工业的发展，废轮胎的处理成为亟待解决的问题。传统的填埋和焚烧等 处理方式因其对环境造成危害已经在一些国家被禁止。而废轮胎热解能有效解决这一 难题，且可以得到且可以得到热解气、热解油和炭黑，热解气净化后作为高热值的燃 气，热解油可以作为燃料油或经过深加工作为化学品重新利用，热解炭黑可以做为填 充炭黑。回转窑的运行可靠、操作弹性大、适应性强、处理能力大、因此广泛应用于 炼金，建材，轻工的部门。83980

本文设计出实际可行的废轮胎回转窑热解系统。包括回转窑筒体尺寸的设计和材 料的选择，进料装置中螺旋轴的设计及电动机的选型，传动装置中电动机的选型和大 齿圈、小齿轮的尺寸确定，支撑装置内轮带、托轮的设计，还有其它系统部件的设计 与选择。同时对回转窑窑内的传热过程进行了分析模拟，完善了回转内壁与料床间传 热过程的研究，进而提出电热式炉型的传热模型，通过 COMSOL 对传热模型进行数 值模拟分析，得出温度分布情况。综合考虑物料和筒体的温度情况，分析回转率热解 系统的可行性。

毕业论文关键词：热解；回转窑；换热系数；数值模拟； 传热模型

Abstract With the development of automobile industry, the processing of waste tires become a problem to be solved。The traditional landfill and incineration treatment because of its harm to the environment has been banned in some countries。And waste tires pyrolysis can solve this problem effectively, and can be obtained and pyrolysis, pyrolysis oil and carbon black can be obtained。As a high calorific value gas after pyrolysis gas purification,Pyrolysis oil can be used as a fuel oil or highly processed as chemical reuse,Pyrolysis carbon black as filler carbon black。Reliable operation of rotary kiln, large elasticity of operation, strong adaptability, large capacity, so widely used in gold, building materials, light industry department。

This article design a practical selection of system components。Including the design of the rotary kiln cylinder size and the selection of materials,The design of the feeding device of the spiral shaft and motor selection,Transmission device of motor selection and the size of the big ring gear and small gear,Support belting leather plant, the design of the roller,Support belting leather plant, the design of the roller。Analyses the heat transfer process in rotary kiln, we will complete the mechanism of heat transfer between the rotary surface and material bed, and put forward the general calculation correlations。 Put forward with internal heat transfer model of fumace type, through COMSOL numerical simulation analysis was carried out on the heat transfer model, the temperature distribution are obtained。 Considering the material and the temperature of the cylinder, the feasibility of the temperature of the cylinder, the feasibility of the pyrolysis of turn rate system。

Key word: pyrolysis; rotary kiln; heat transfer coefficient; numerical simulation; the heat transfer model

目 录

第一章 绪论

1。1 废轮胎热解技术简介 1

1。2 回转窑概述 1

1。3 国内外研究现状 2

1。3。1 国外研究现状 2

1。3。2 国内的研究现状 3

1。4 选题的目的及意义 4

第二章 回转窑的热解系统的设计 5

2。1 回转窑热解装置的原理及结构