浮头式换热器毕业设计方案说明指导书摘要本次设计为浮头式换热器，浮头式换热器主要由管箱、管板、壳体、换热管、折流板、拉杆、定距管、钩圈、浮头盖等组成。浮头换热器的一端管板与壳体固定，另一端为浮动管板。因此其优点为热应力较小，便于检查和清洗，缺点为结构较为复杂。在传热计算工艺中，包括传热量、传热系数的确定和换热器内径及换热管型号的选择，以及传热系数、阻力降等问题。在强度计算中主要讨论的是筒体、管箱、管板厚度计算以及折流板、法兰和接管、支座、分隔板等零部件的设计，还要进行一些强度校核。本设计是根据 GB151《管壳式换热器》和 GB150《钢制压力容器》设计的。换热器在工、农业的各个领域应用十分广泛，在日常生活中传热设备也随处见，是不可缺少的工艺设备之一。随着讨论的深化，工业应用取得了令人瞩目的成果。 关键字：换热器，工艺计算，强度校核Abstract This design is floating head heat exchanger, it is made up of tube box 、 tube sheet 、 shell 、 heat exchange tube 、 baffle plate 、 draw bar 、 spacer pipe 、 hook circle、floating head cover and so on. One tube sheet of the exchanger is connected with shell, and the other tube sheet is floating tube sheet. So it’s easy to check and clean. On the other hand the structure of it complex. In the process of heat transfer calculation, include area computation 、 capacity of heat transmission 、 the determine of heat transfer coefficient and the choice of the heat exchange tube. About strength calculation, it involve the calculating of shell 、tube box 、 sealing head and so on. This design is according to GB151 << shell-and-tube heat exchanger >> and GB150 << Steel pressure vessel >> to design. Heat exchanger is one of the indispensable process equipment. With the deepening of the research, industrial application made remarkable achievements. Keywords: heat exchanger; Process calculation ；strength check 目录摘要................................................................
