浮头式煤气冷换热器毕业设计.doc

摘 要 换热器是将热流体的部分热量传递给冷流体的设备，以实现不同温度流体间的热能传递，又称热交换器。换热器是实现化工生产过程中热量交换和传递不可或缺的设备。 本设计是以《传热学》为基础，根据《热交换器原理与设计》进行热力计算，参照GB 151—1999标准选型设计出了一个有效换热面积为61.8，管外一程、管内二程（1-2型）的浮头式煤气冷却换热器。 本毕业设计首先是热力计算，主要根据给定的设计条件估算换热面积，从而进行换热器的选型，校核传热系数，计算出实际的换热面积，最后进行压力降和壁温的计算。然后是关于结构和强度的设计，主要是根据已经选定的换热器型式进行设备内各零部件（如折流板、拉杆、钩圈、浮头盖等）的设计。最后设计结果可通过表3-9和2张CAD图表现出来。 关键词：管壳式换热器 浮头式换热器 热力计算 浮头盖 浮头法兰 Abstract The heat exchanger is part of the thermal fluid heat transfer equipment to the cold fluid, in order to achieve different temperature heat transfer fluid, also known as heat exchangers. The heat exchanger is the heat exchange process of the realization of the chemical production and delivery of essential equipment. This design is based on the heat transfer based on thermodynamic calculation based on the heat exchanger principle and design, reference GB of 151-1999 standard selection to design an effective heat transfer area is 61.8, outside the one-way pipe tube two of shell (1-2 type) floating head gas cooling heat exchanger. This graduation project is first of all the thermodynamic calculation, according to the given design conditions to estimate the heat transfer area, thus the selection of the heat exchanger, check the heat transfer coefficient, to calculate the actual heat transfer area, and finally the pressure drop and wall temperature calculations. And then on the structure and strength of design, mainly based on the type of heat exchanger has been selected the design of the device components (such as baffles, rod, hook ring, floating head cover, etc.). The final design results shown in Table 3-9 and two CAD drawings. Key word: Shell-Tube heat exchanger, floating head heat exchanger, tube sheet, floating head planting, floating head flange. 目 录 摘 要 I 前 言 1 1 换热器概述 2 1.1 换热器的应用 2 1.2 换热器的主要分类 2 1.2.1 换热器的分类及特点 2 1.2.2 管壳式换热器的分类及特点 3 1.3 管壳式换热器特殊结构 9 1.4 换热管简介 9 1.5本章小结 10 2 热力计算 11 2.1 设计条件 11 2.2 核算换热器传热面积 11 2.2.1 流动空间的确定 11 2.2.2 初算换热器传热面积 12 2.2.3 总传热系数K的校验 13 2.2.4