大学毕设论文--气液介质专用换热器设计.docVIP

摘要 气-液换热器又称回热器，其作用是使节流前的制冷剂液体过冷，使从蒸发器流过来的制冷剂饱和蒸气过热，这样既保证了压缩机工作的安全性，又可以提高整个系统的制冷量。气-液热交换器的结构通常采用壳-盘管式，还有绕管式、套管式等结构。本文主要是根据给定的参数和工艺要求来设计相应的管壳式换热器。本文首先根据工艺条件来进行计算，选定气-液换热器型式，本设计选定固定管板式列管换热器，确定换热器参数。然后进行结构上的设计和强度计算，进行四种工况校核，其结果都满足要求。然后进行接管补强，水压试验，结果也都满足要求。最后再根据标准选取接管、法兰、鞍式支座、垫片等。? 体壁厚和管箱壁厚的计算管子的拉脱力和稳定性校核接管、法兰、容器法兰、支座等的选择及开孔补强设计壳体与管板连接设计 本设计通过对壳体内外的研究，对气-液换热器有了初步的认识，并根据相关知识，进行了一系列相应的设计计算，并最终完成了气氨冷却器总体的结构设计，并绘制出了设备总图及零部件图。其中包括气-液换热器总图，折流板零件图，筒体零件图等。? 关键词： 管壳式换热器； 工艺计算； 强度计算  Abstract This?article?mainly?according?to?the?given?parameters?and?technical?requirements?to?design?the?corresponding?tube?heat?exchanger.?At?first,?this?paper?calculated?according?to?the?process?conditions,?select?heat?exchanger?type,?the?design?selected?fixed?tube?plate?shell?and?tube?heat?exchanger,?heat?exchanger?parameters.?Then?carries?on?the?structure?design?and?strength?calculation,?four?kinds?of?working?condition?checking,?the?result?is?meet?the?requirements.?Finally?take?over?reinforcement,?hydrostatic?test,?the?result?is?meet?the?requirements.?According?to?the?standard?selection?of?takeover,?flange,?saddle?support,?gaskets.? First according to the given temperature and design pressure to determine the structure of device and the shell side and tube side of the material, then according to the nature of the material and the heat transfer area to determine the heat exchange tube material, size and number. According to the root of the heat exchange tube, the number of heat exchange tube arrangement, and according to the arrangement of heat exchange tube to determine cylinder diameter and length, and the choice of the baffle plate. Connection between the selection of standard parts, parts of the structure of the design, the selection of component materials and the thickness of the calculation. Including the cylinder body wall thickness, head wall thickness and pipe wall thickness and the calculation of wall thickness, tube pulled off force and stability checking, take over, flange, selectio