摘要随着我国汽车产业的发展，汽车的数量也逐渐增多，这也导致了废轮胎的产量增 多，越来越多的废轮胎被堆积到了焚烧厂，造成了资源的极大浪费和严重的环境污染。 为了对废轮胎进行回收利用，迫切需要对废轮胎热解装置的设计。83510

固定床式废轮胎热解装置是将破碎后的废轮胎颗粒放入热解炉内加热至 500℃， 并通入惰性气体（或 N2）进行热解反应，废轮胎在高温环境中进行裂解反应生成小 分子裂解气，从而达到对废轮胎的回收再利用的目的。热解产物经过加工和处理后， 能被重新利用，实现了废轮胎的二次利用。

热解气体可以作为生活能源使用或者提供给热解装置供热或者为其它工厂提供 能量;热解油可以用作燃料，也可以继续催化裂解，为其他领域提供原料。本课题主 要研究固定床式废轮胎热解装置热解系统的设计，包括热解炉设计、风机选型和温控 装置选型。然后对热解炉进行热力学分析，完善设计方案，从而达到优化设计的目的。 本设计采用内、中、外三筒设计方案，内筒直径为 20mm，中筒直径为 1000mm，外筒直径为 1100mm。惰性气体（或 N2）由内筒导入热解炉内部，起到加速炉体内气 体流通、加快热解二次反应的目的；中筒存放废轮胎颗粒用以热解；外筒和中筒之间 留有间隙，使热解气和通入的惰性气体（或 N2）的混合气体顺着间隙流到出口出导 出。如果采用整胎热解的方式，会省去破碎的环节，不需要使用破碎机，可以大量节 省破碎成本减少了废轮胎预处理的时间。但整胎热解的缺点是每次只能热解少量废轮 胎，造成更换原料过于频繁，操作难度加大，热解的效率略低，不适合大规模生产。

运用 fluent 软件对进气口不同流速时热解炉炉内的流场进行分析，得出最佳的进 气 速 度 从 而 达 到 优 化 的 目 的 。 从 分 析 结 果 可 以 看 出 ， 进 气 口 速 度 设 定 在

0。5m/s~1。5m/s 之间比较合适。

毕业论文关键词：固定床 废轮胎 热解

ABSTRACT With the development of Chinese automobile industry, the number of cars is increasing。, which also led to an increase in production of waste tires。Scrap tires are piled more and more to the incineration plant, resulting in a tremendous waste of resources and serious environmental pollution。 To waste tire recycling, waste tires is an urgent need for the thermal design of the device solution。

Fixed bed pyrolysis of waste tires means the tire grain is crushed into the pyrolysis furnace heated to 500 ℃, and an inert gas (or N2) pyrolysis reaction, scrap tire pyrolysis reaction carried out in a hot environment small molecule pyrolysis gas, so as to achieve the purpose of the recovery of waste tires recycling。The pyrolysis products can be re used to achieve the two utilization of waste tires after processing and treatment。

Pyrolysis gas can be used as a living energy or provided to the pyrolysis unit heating or other plants to provide energy; pyrolysis oil can be used as fuel, but also can continue to catalytic cracking, to provide raw materials for other areas。 The main topic of pyrolytic fixed-bed pyrolysis system design device, including pyrolysis furnace design, fan selection and temperature control device selection。 Then pyrolysis furnace thermodynamic analysis, perfect design, so as to achieve the purpose of optimizing the design。

This design adopts the inner, middle and outer and the diameter of inner is 20mm,the diameter of middle is 1000mm,the diameter of outer is 1100mm。 Cylinder design  scheme of inert gas (or N2) or by the inner barrel internal import pyrolysis furnace, accelerate the gas inside the furnace body circulation, accelerate the purpose of the pyrolytic secondary reaction; Deposit in barrel waste tire pyrolysis; Gaps between outer cylinder and the cylinder, the pyrolysis gas and flux into the inert gas (or N2) along the clearance flow of gas to export the export。 If adopt the way of the whole tire pyrolysis, may leave out a broken link, do not need to use the crusher, to save a lot of broken cost reduced the waste tires pretreatment time。 But the whole tire pyrolysis per pyrolysis are the shortcomings of a small amount of waste tyres, causing frequent replacement raw material, operation difficulty, the efficiency of pyrolysis is low, not suitable for mass production。