热粗煤气、合成气热交换器设计的毕业设计.docVIP

热粗煤气、合成气热交换器设计 机电工程系… 指导老师：… 摘 要：换热器是许多工业部门广泛应用的工艺设备。设计中考虑操作条件及介质的特性，本设计采用固定管板式换热器结构。该设备适用于温度不大，壳程流体清洁，不易结垢拆卸，清洗的场合。在设计过程中，依照GB151-1999《钢制管壳式换热器》对换热器依次进行工艺计算、结构设计、强度计算，最后完成专题讨论。本设计每层管子排列方式采用正三角形排列，这种方法在相同的面板面积上可排较多的管子，且管外表面传热系数大。最后检测该换热器是否满足介质换热的需求。  关键词：换热器，固定管板，工艺设计，结构设计，强度计算。 The design of hot coal gas, synthesis gas heat exchanger Department of mechanical and electrical engineering equipment and process control1022Liu Huan instructs teacher: Yan Jianxin Abstract : Heat exchanger is a kind of process equipment which is widely used by many Industry departments. Considering the operating conditions and the characteristic of medium, this design uses the fixed tube sheet heat exchanger structure. The equipment is suitable for the situation that temperature is not high and not easy scaling. In this design process, according to the GB151-1999the type of steel tube shell heat exchanger conduct process calculation, structure design, strength calculation, finally completes the seminar. The arrangement mode of each layers of tube in this design adopts equilateral triangle arrangement. This method in the same area of the panel can be discharged more pipes, and the outer surface of the tube own high conduct heat coefficient. Finally, testing this heat exchanger whether meet the demand of heat transfer medium. Key words: Heat exchanger a fixed tube sheet process design structure design strength calculation 目录摘要. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .- I - 1 工艺流程 - 1 - 1.1 合成氨的工艺流程 - 1 - 1.2 低温甲醇洗工段工艺流程 - 2 - 1.3 换热器(w-501)的设计说明 - 2 - 1.4 工艺过程及控制参数的选取 - 3 - 1.5 控制方案的设计 - 3 - 1.6 各仪表的作用方式 - 4 - 2 工艺计算 - 5 - 2.1 原始数据 - 5 - 2.2 类型选择 - 5 - 2.3 流体流径的选择 - 5 - 2.4 工艺参数的计算 - 6 - 2.4.1 确定冷热流体的定性温度 - 6 - 2.4.2 物性参数的计算 - 6 - 2.4.3 计算热负荷 - 11 - 2.4.4 平均温度差 - 12 - 2.4.5 初选总传热系数 - 13 - 2.4.6 初算所需传热面积 - 13 - 2.4.7 换热器结构设计 - 13 - 2.4.8 核算总传热系数 - 14 - 2.5