预热器课程设计2_new重点解读.doc

精馏塔进料预热器的设计说明书 姓 名： 学 号：专业班级：高分子材料与工程09-3 指导老师： 日 期：2012年6月29日 目录 一、前言 3 二、正文 11 2.1 确定方案 11 2.2设计计算 11 2.2.1 初选型号 11 2.2.2 结构设计 14 2.2.3 校核 16 2.2.4 强度设计 18 三、设计结果一览表 24 四、主要符号说明 25 五、小结 25 六、参考文献 26 摘要 随着换热器在工业生产中的地位和作用不同，换热器的类型也多种多样，不同类型的换热器各有优缺点，性能各异。在换热器设计中，首先应根据工艺要求选择适用的类型，然后计算换热所需传热面积，并确定换热器的结构尺寸。 本课程设计以0.6MPa的饱和水蒸气加热初始温度为20摄氏度40%的乙醇水溶液，首先根据进料热状况参数计算出进料温度，即冷流体出口温度，然后按照所规定的工艺条件 通过以上计算，绘制精馏塔进料预热器的工艺流程图和结构图，设计出能满足要求处理量及处理特定物料的换热器。 Abstract With the status and role of heat exchangers in industrial production, the type of heat exchanger is also a variety of different types of heat exchangers have advantages and disadvantages, and different performance. In heat exchanger design, we should first select the applicable type, and then calculate the heat exchanger heat transfer area required, and determine the size of the structure of the heat exchanger according to process requirements. This course is designed to 0.6MPa of saturated steam heating the initial temperature of 20 degrees Celsius and 40% aqueous ethanol solution, first of all according to the parameters of the feed thermal conditions of feed temperature, the cold fluid outlet temperature, and then follow the required process conditions. by studying the mechanism of heat transfer to calculate the heat transfer area, checking the heat transfer coefficient and thus to explore the type and structure of the heat exchanger, the main heat exchanger type has been selected, the device internal parts (such as take over the baffle from the pipe, pipe boxes, etc.) design, including choice of materials, specifically to determine the size, the specific location of the installation, the calculation of the thickness of the tube plate, flange options, opening reinforcement calculation. Through the above calculation, draw a process flow chart and block diagram of the distillation column feed preheaters, and designed to meet the requirements of processing capacity and processing of specific materials heat exchang