【正文】 the physical material parameters, bined with the working conditions, select the type of heat exchanger. According to the design task, determine the process parameters on the heat transfer area, the total heat transfer coefficient, and heat transfer area, wall temperature and pressure drop calculation. Then the mechanical design based on process parameters, mechanical design including the tube, tube box, tube plate, baffle, head, tube heat exchanger, saddle and other parts, such as the bar, fixed pitch pipe calculation and selection, and calculated the strength necessary, finally using AutoCAD drawing fixed tube plate heat exchanger the assembly diagram and parts diagram, and writing a specification. [keyword]:heat exchanger,the heat transfer area,tube sheet,heat exchange tube. 目 錄 1 概述 ..........................................................................................................................1 選題的根據和意義 ...........................................................................................1 本設計的目的和要求 .......................................................................................2 國內外現(xiàn)狀和發(fā)展趨勢 ...................................................................................2 2 管殼式換熱器的分類和選型 .................................................................................3 分類 ...................................................................................................................3 選型 ...................................................................................................................6 3 換熱器的工藝設計 ..................................................................................................7 工藝計算 ...........................................................................................................7 流徑選擇 ....................................................................................................7 確定物性參數 ............................................................................................7 熱負荷及冷卻水用量計算 ........................................................................8 傳熱平均溫度差的計算 ............................................................................8 計算傳熱面積 ............................................................................................9 計算工藝結構尺寸 ....................................................................................9 換熱器核算 .....................................................................................................15 傳熱能力核算 ..........................................................................................15 壁溫核算 ..................................................................................................18 換熱器內流體的流動阻力 ......................................................................19 換熱器主要結構尺寸和計算結果 .................................................................22 4 換熱器的機械設計 ...............................................................................................23 計算筒體厚度 .................................................................................................23 筒體材料的選擇 ......................................................................................23 筒體厚度 ..................................................................................................23 計算管箱短節(jié)、封頭厚度 ..............................................................................24 管箱的結構形式 ......................................................................................25 管箱結構尺寸 ..........................................................................................25 管箱短節(jié)及封頭厚度 ..............................................................................26 開孔補強的校核 .............................................................................................29 管箱短節(jié)開孔補強的校核 ......................................................................29 筒體節(jié)開孔補強的校核 ..........................................................................31 排氣口、排液口開孔補強的校核 ...........................................................33 管板設計 ...........................................................................................................33 換熱管與管板的連接 ................................................................................34 管板與殼體的連接 ....................................................................................35 管板與管箱的連接 ....................................................................................37 管板材料 ....................................................................................................37 管板計算的相關參數的確定 ....................................................................38 計算法蘭力矩 ............................................................................................40 管板計算的另一些相關參數的確定 ........................................................45 校核設計條件不同的組合工況 ................................................................47 換熱管 ...............................................................................................................59 換熱管的型式 ............................................................................................59 換熱管的材料與質量等級 ........................................................................60 管孔 ............................................................................................................60 折流板 ...............................................................................................................60 材料的選取 ................................................................................................60 折流板的間隙 ............................................................................................60