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化工原理课程设计

煤油冷却器的设计

姓 名： 学 号： 学 院： 专业班级： 指导教师：

xx年xx月

摘 要

本设计的任务就是完成一满足生产要求的列管式换热器的设计和选型。 本设计的核心是计算换热器的传热面积，进而确定换热器的其他尺寸或选择换热器的型号。由总传热速率方程可知，要计算换热面积，得确定总传热系数和平均温差。由于总传热系数与换热器的类型、尺寸、流体流到等诸多因素有关，----而平均温差与两流体的流向、辅助物料终温的选择有关，因此管壳式换热器设计和选型需考虑许多问题。通过多次核算和比较，设计结果如下：带膨胀节的固定管板式换热器，选用φ25Χ2.5的碳钢管，换热面积为131.4 m2，且为双管程单壳程结构，传热管排列采用组合排列法，即每程内均按正三角形排列，隔板两侧采用正方形排列。管数为300，管长为6m，管间距为32mm，折流板形式采用上下结构，其间距为150mm，切口高度为25%，壳体内径为700mm，该换热器可满足生产需求。

Abstract

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The task of this design is to complete a meet the production requirements of shell and tube heat exchanger design and type selection. The total heat transfer rate equation shows that to calculate heat transfer area, you must determine the total heat transfer coefficient and the mean temperature difference. Through the repeated calculation and comparison, design results are as follows. Fixed tube plate heat exchanger with expansion joint, Select phi25?25carbon steel pipe, heat transfer area of 131.4 square meters, And for the tube side shell side of the single structure, the pipe arrangement method, namely each way are sorted by regular triangle, diaphragm use square is arranged on both sides. Pipe number is 300, the length is 6 meters, tube spacing is 32 mm, baffle plate form adopts up and down structure, the spacing is 150 mm, incision height was 25%, the shell inside diameter is 700 mm, the heat exchanger can meet the production requirements.

目 录

前言 ......................................................................................................................................................................... 4

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