255吨每小时u形管式冷却器设计 大学学位论文.doc

摘要 本文介绍了U型管冷却器的整体结构设计计算。U型管冷却器仅有一个管板，管子两端均固定于同一管板上，管子可以自由伸缩，无热应力，热补偿性能好；管程采用双管程，流程较长，流速较高，传热性能较好，承压能力强，管束可从壳体内抽出，便于检修和清洗，且结构简单，造价便宜。U型管式冷却器的主要结构包括管箱、筒体、封头、换热管、接管、折流板、防冲板和导流筒、防短路结构、支座及管壳程的其他附件等。 换热器的设计工作主要有换热器综述，换热器的工艺计算以及结构强度计算。其中换热器工艺计算中需要根据初始数据计算其处理量以及工艺参数，换热器的结构强度计算主要集中在折流板，筒体以及开口上。 换热器是化学工艺生产中重要的设备之一，它是一种冷热流体间的传递热量的设备，他们的使用条件和要求差别很大，如容量，温度，压力和工作介质的性质等，涉及的种类很多，因此换热器的结构形式也多种多样。U形管换热器仅有一个管板，管束可从壳体内抽出，便于检修和清洗，而且结构简单，造价便宜。U形管换热器主要结构包括筒体，封头，换热管，接管，折流板，防冲板，导流筒，防短路结构，支座和管壳层的其他设备等。 本次设计为二类压力容器，设计温度和设计压力都较高，因而设计要求高。冷却器采用双管程，不锈钢换热管制造。设计中主要进行了冷却器的结构设计，强度设计以及零部件的选型和工艺设计。 关键词： U型管冷却器； 结构； 强度； 设计计算 Abstract This paper introduces the U-tube heat exchanger design and calculation. U-tube heat exchanger has only one tube sheet, tubes are fixed at both ends of boards in the same tube, and tubes could telescopic freely, non-thermal stress, thermal performance and compensation; use of double-tube process, the process is longer, higher speed, better heat transfer performance, pressure capacity, and control can be extracted from the shell with easy maintenance and cleaning, and simple structure cost less. The main structure of U-tube heat exchanger, includes Equipment control, shell, head, exchanger tubes, nozzles, baffled, impingement baffle, guide shell, anti-short-circuit structure, support and other shell-tube accessories. This time I designed a second category pressure vessel, which has high design temperature and high design pressure. Thus the design demands are strict. It has dual heat exchanger tube, stainless steel heat exchanger manufacturers. I mainly carried out the design of heat exchanger structural design, strength of design and parts selection and process design. The design for the second category pressure vessel, design temperature and design pressure are high, so the design requirements is high. Double tube heat exchange, heat transfer tubes of stainless steel manufacturing. Design mainly for the design, selection and process design and strength design of heat