U型管式换热器设计毕业设计说明书.doc

摘 要 换热器是化工生产过程中的重要设备，它能够实现介质之间热量交换。广泛应用于石油、化工、制药、食品、轻工、机械等领域。U型管式换热器用于高温高压的场合。甲烷化换热器是合成氨生产中的重要设备之一, 它能将的混合气升温至274，同时将339的精制气降温至。甲烷化换热器型甲烷化换热器型甲烷化换热器型甲烷化换热器的混合气升温至，同时将的精制气降温至型甲烷化换热器能将150的混合气升温至274，同时将339的精制气降温至215。型甲烷化换热器甲烷化换热器Abstract Heat exchanger is important in the process of chemical production equipment, which can be achieved between the heat exchange media. Widely used in petroleum, chemical, pharmaceutical, food, light industry, machinery and other fields. U-tube heat exchanger is a heat exchanger, it has only one tube plate, simple structure, less sealing surface, and the U-shaped tubes are free to stretch, no thermal stress, it can be used for high temperature and pressure of the occasion . General high-pressure, high temperature, corrosive media, take control process, thus reducing the pressure of space, and can reduce heat loss and saving materials and reduce costs. Methanation heat exchanger, ammonia production is one of the important equipment, it will be 27 ℃ of H2N2 mixture heated to 274 ℃, 339 ℃ while the H2N2 refined gas cooled to 90 ℃. Methanation heat exchanger is generally used in U-tube heat exchanger, which consists of Type Ⅰ and type Ⅱ methanation methanation Heat exchanger connected to form a methanation type. Heat exchanger type Ⅰ methanation of H2N2 to 27 ℃ heating the mixture to 150 ℃, 215 ℃ while the H2N2 refined gas cooled to 90 ℃; Ⅱ-type heat exchanger can methanation 150 ℃, heating the mixture to the H2N2 274 ℃, 339 ℃ while the H2N2 refined gas cooled to 215 ℃. This design mainly based on GB150 "steel pressure vessels"and GB151 "shell and tube heat exchangers, " the main pressure parts of the equipment was designed and strength calculation, but also with HG/T20615 "steel pipe flange", JB / T 4712 "containers bearing" pressure vessels and other relevant standards, the design of other components, he finally completed the methanation Ⅱ type heat exchanger design. Keywords: Heat exchanger;Methanation heat exchanger 目 录 图表清单 1 符号说明 3 引言