碱洗气水冷器的设计+CAD图纸+答辩PPT
时间:2017-06-27 19:54 来源:毕业论文 作者:毕业论文 点击:次
| 摘要：传热设备作为一种通用设备广泛应用于化工、炼油、动力、冶金及其它许多工业部门，尤其在化工和炼油行业，传热设备占有很大的投资比例。列管式换热器的特点是结构简单、紧凑，能承受较高的压力，造价低，管程清洗方便，管子损坏时易于堵管或更换。但当管束与壳体的壁温相差较大时，壳体和管束中将产生较大的热应力。列管式换热器是由筒体、管箱、管板、封头、折流板。换热管等零部件组成。设计的内容包括总体方案确定、物性参数确定；热力计算、阻力计算；细部结构的设计等。根据已选定的换热器型式进行设备内各零部件的设计，如壳体，管板、折流板、拉杆、管箱等。包括设计计算、材料选择、具体尺寸和位置确定、管板的厚度计算、法兰厚度的计算、开孔补强等。10797 关键词： 换热器；薄管板；外导流筒 Design of Alkali Washed Gas Water Cooler Abstract:The heat transfer as a generic device widely used in chemical, oil refining, power, metallurgy and many other industrial sectors account for a large proportion of investment, especially in the chemical and oil refining industries. And tube heat exchanger is characterized by simple and compact structure, can withstand high pressure, low cost, easy to clean tube, pipe damaged easily plugging or replacement. However, when the tube bundle and the shell wall temperature difference is large, large thermal stress will be generated in it. And tube heat exchanger from the cylinder tube box, tube plate, head baffle. Heat transfer tubes and other component parts. The design includes overall program to determine the physical parameters determine; thermodynamic calculation; calculation of resistance; detailed structure of the design. Have been selected according to the type design of the heat exchanger inside the device parts, such as housing, tube plate, baffle, rod, tube box. Including design calculations, the choice of materials, the specific dimensions and position determination, the tube plate thickness calculation, the calculation of the thickness of the flange opening and reinforcement. KeyWords: Heat exchanger; thin tube sheet; external guide shell 目 录 1 绪论 1 1.1 前言 1 1.2 换热器的分类 1 1.2.1 间壁式换热器 1 1.2.2 蓄热式换热器 1 1.2.3 流体连接间接式换热器 2 1.2.4 混合式换热器 2 1.3 列管式换热器的基本结构及工作原理 2 1.4 课题研究的意义 3 1.5 国内外近年来的研究进展与主要成果 3 1.6 本文的研究内容 4 2 工艺计算 5 2.1 热力计算 5 2.1.1 确定物性数据 5 2.1.2 物性参数计算 5 2.1.3 流动空间及流速的确定 5 2.1.4 计算总传热系数 6 2.1.5 换热器核算 9 2.2 阻力计算 11 2.2.1 管程流动阻力 11 2.2.2 壳程阻力 12 3 换热器结构设计与强度校核 13 3.1 壳体与管箱厚度的确定 13 3.1.1 壳体和管箱材料的选择 13 3.1.2 圆筒壳体厚度的计算 13 3.1.3 管箱壁厚 14 3.2 封头 14 3.3 水压试验校核 15 3 3.1 筒体的应力校核 15 3.3.2 封头的应力校核 15 3.3.3 管箱的应力校核 16 3.4 换热管 16 3.4.1 管程分程 16 (责任编辑：qin) |