单壳程浮头式换热器设计(含CAD零件图装配图)

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[size=1em]单壳程浮头式换热器设计(含CAD零件图装配图)(选题审批表,任务书,开题报告,中期检查表,外文翻译,论文说明书10000字,CAD图5张)
摘 要
换热器是化工生产中重要的设备之一，它是一种冷热流体间传递热量的设备，其中管壳式换热器应用最为广泛。本次设计为浮头式换热器，浮头式换热器主要由管箱、管板、壳体、换热管、折流板、拉杆、钩圈、浮头盖等组成。浮头换热器的一端管板与壳体固定，另一端为浮动管板。因此其优点为热应力较小，便于检查和清洗，其相较于固定管板式和U形管式的结构复杂，造价较高。
本次设计分工艺计算，结构设计和强度校核。在传热计算工艺中，包括传热面积计算，传热量、传热系数的确定和换热器内径及换热管型号的选择，以及传热系数、压降及壁温的验算等问题。在结构设计和强度校核中,主要讨论的是筒体、管箱、封头、管板以及折流板、法兰、垫片和接管、支座、分隔板等零部件的设计和强度校核。
关键词：换热器  强度校核  工艺计算  结构设计

Design of floating head heat exchanger using the single side shell
Abstract
Heat exchanger is one of the important equipment in the chemical production.It is a kind of equipment which cold and hot fluid transfer heat each other. Tube heat exchanger is used widely. The design is  floating head heat exchanger. Floating head heat exchanger is mainly composed of tube box, tube plate, shell, heat exchange tube, baffle plate, rod, hook ring, floating head cover, etc. The end of floating head heat exchanger fixed tube sheet and shell, the other end is floating tube sheet. So its advantages is the thermal stress is lesser, facilitate inspection and cleaning. It compared with fixed tube plate and U tube type, it has complex structure, high cost.
The design has process calculation, structure design and strength check. In the heat transfer calculation process, it includes the heat transfer area computation the determination of heat transfer, heat transfer coefficient , the selection of heat exchange tube type heat exchanger and diameter ,calculating the heat transfer coefficient, pressure drop and the wall temperature and so on. In structure design and strength check. It discusses the design and strength check of the cylinder, pipe, head, tube plate and baffle plate, flange, gasket, and taking over, bearing, division plate parts.
Key Words: Strength check; Heat exchanger；Process calculation；architectural design

2.2 选择方案
1.2.1 换热器类型的确定   两流体的温度变化情况为煤油进口120℃，出口70℃；而水进口的温度35℃，出口的温度45℃。换热器的管壁温度和壳体温度差距比较大，所以选用浮头式换热器较为妥当。
1.2.2 流程的安排   从两流体工作压力来看，水是2MPa，煤油是1.9MPa，水走管程，煤油走壳程。而且工业水流速低，容易结垢，若其流速太低，加快污垢增长速度，则换热器传热能力下降，从总体考虑，水走管程，煤油走壳程。

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