摘要
 
  本设计是双管程固定管板式换热器，也是目前应用比较广泛的一种换热器主要完成的是水蒸气-水之间的热量交换固定。这类换热器具有结构简单、紧凑、可靠性高、适应性广的特点,并且生产成本低、选用的材料范围广、换热表面的清洗比较方便。固定管板式换热器能承受较高的操作压力和温度，因此在高温高压和大型换热器中，其占有绝对优势。
本次设计的题目是固定管板式换热装置的设计，课题预期达到的目标为：
换热器面积的计算（实际换热面积：160m²），管程壳程压力降的计算（小于等于0.9MPa），工艺结构尺寸的计算：管程数（2管程），换热管的确定（内径：19mm 数量：450根），壳体内径（600mm），壳程数（1壳程）的计算，折流板的选型（形式：弓形折流板，数量：13）等。
换热器的强度计算：对筒体、管箱厚度的计算和校核，对壳体及管箱各处开孔补强，对延长部分兼做法兰的计算及强度核算。经水压试验、压力校核后显示结果全部合格。
换热器的结构设计：折流板、法兰（甲型平焊法兰）、换热管、支座（鞍式支座）、垫片（石棉橡胶板垫片）的规格及选型。
完善设计图纸及设计说明书。
关键词： 换热器； 工艺； 结构； 强度
 

Abstract
 
Fixed tube plate heat exchanger is a typical structure of the shell and tube heat exchanger and a wide range of heat exchanger. This type of heat exchanger has the characteristics of a simple structure, compact, high reliability and wide adaptability , and low cost of the production, wide choice of used materials, more convenient of cleaning heat exchanger the surface . Fixed tube plate heat exchanger can withstands the higher operating pressure and temperature, so it has the absolute advantage in the possession of high temperature and high pressure heat exchangers and large.
This design topic is naphtha condenser design, the goal which the topic anticipated achieved.
In this design the craft design of heat exchanger, the heat transfer area computation(actual heat transfer area:160㎡); the tube side pressure drop computation(≤0.4MPa); the craft structure size computation: number of tube passes(2 tube passes).         
The number of heat exchange tube(inside diameter: 19mm, number: 900), the inside diameter of shell(1000mm), number of shell passes(1 shell passes), the lectotype of baffle board(form: segmental baffle, number: 13) etc.  
The strength calculation of heat exchanger: the computation and check of cylinder thinckness  and channel thinckness, the shell and the reinforcement for opening supplements the intensity, the extension part concurrently makes the flange the computation and the intensity calculation. Examinatation part carried on the hydraulic pressure test, the pressure examination and so on, in which all results has been all qualified.
The structural design of the heat exchanger the specification and lectotype of baffle plate, flange(type a manhole weded flange), heat exchange tube、suppot(saddle support)、gasket(paronite gasket)Consummates the design paper and the design instruction booklet.
Key words:Heat exchanger;  Craft;  Structure;  Intensity;