摘要本设计是双管程固定管板式换热器，是目前应用较为广泛的换热器。固定管板式换热器的优点是：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；这种换热器使用于壳侧介质清洁且不宜结垢，并能进行清洗管束，壳程两侧温差不大或者温差较大但壳侧压力不高的场合。本台换热器主要完成的是甲醇蒸汽、水蒸气-水之间的热量交换，设计压力为管程 0.6MPa，壳程 0.6MPa，工作温度管程进/出口 32/42℃，壳程进出口 91.86/86.4℃，设计温度管程 60℃，壳程 150℃，管程介质为 0.4MPa 的水，壳程介质主要为 0.1MPa 的甲醇蒸汽（85%）与水蒸气（15%）的混合物，传热面积为 158m2，采纳 Φ25×2.5×4500 的无缝钢管换热，则可计算出 446 根换热管，DN=800mm 的圆筒。本台换热器的管板延长兼做法兰，管板与换热管的连接方式为焊接，因管板上的应力较多，且内外温度有一定的差值，因此，对管板强度的校核是一个重点，也是一个难点，本文根据弹性支撑假设对管板进行设计和校核的。关键词： 换热管； 固定管板； 温差应力AbstractThis design is about fixed plate heat exchanges. At present this exchanges are most used.The advantages of the fixed tube-shell exchanged: The exchanged can bear high press; the price of making is low; Structure is simple and compacted; we can wash the tubes easily; we can change the broken tubes conveniently. The foremost shortcoming of the fixed tube-shell exchanged is the heats tress between the shell and the tubes is very large. This exchanged is mainly completed the heat exchange from hot water steam to water. The design pressure of the tube-side is 0.6MPa. The design pressure of the shell-side is 0.6MPa. The work temperature of the import and export of the tube-side is 32/42.The work temperature of the import and℃ export of the shell-side is 91.86/86.4. The design temperature of the tube-℃side is 60.The design temperature of the shell-side is 150.The fluid of℃℃ the tube-side is 0.4MPa water and the fluid of the shell...
