流量1750kg每小时固定管板式换热器设计大学学位论文.doc

摘要 换热器可按照其结构形式有固定管板式换热器填料函式换热器浮头式换热器形管换热器。固定管板式换热器有许多特点特点是少比较便宜密封性能好壳程无法机械清洗管子腐蚀后会和壳体一起报废，设备的寿命就会降低所以当所需流量不同时需要根据不同的流量设计不同的换热器GB150-2011《钢制压力容器》和GB151-1999《管壳式换热器》以及GB和JB等标准以及查看设计要求，我对固定管板式换热器进行了结构设计和CAD绘图。进行了标准件的选取，零件间连接结构的设计，零件材料的选择以及厚度的计算。其中包括了筒体壁厚和管箱壁厚的计算管子拉脱力和稳定性校核接管、法兰、容器法兰、支座等的选择及开孔补强设计壳体与管板连接设计随着经济的发展Abstract Heat exchanger according to its structure form can be divided into: fixed tube plate heat exchanger; Stuffing box heat exchanger; Floating head heat exchanger; U-tube heat exchanger[3]. Fixed tube plate heat exchanger tube and shell heat exchanger, tube heat exchanger is a kind of typical structure, also is a kind of heat exchanger is applied more widely. This kind of heat exchanger with many features: simple structure, compact, widely applicable, high safety coefficient, the material widely, low cost, so the heat exchange surface cleaning is extremely convenient. Due to the fixed tube plate heat exchanger can withstand high temperature and high pressure operation, so in the large-scale heat exchanger with high temperature and high pressure heat exchanger, dominate. Fixed tube plate heat exchanger has many features, the most outstanding characteristic is less forgings, cheaper, sealed performance is good. Due to the shell side cannot mechanical cleaning, so after the pipe corrosion will be scrapped, along with shell will reduce equipment life[4]. So when the flow is not required at the same time, need according to the different heat exchanger of different flow design. First according to the given temperature and design pressure to determine the structure of device and the shell side and tube side of the material, then according to the material properties and the heat transfer area to determine the heat exchange tube material, size, number of root. According to the root of the heat exchange tube, the number of heat exchange tube arrangement, and according to the arrangement of heat exchange tube to determine cylinder diameter and length, and the choice