化工原理课程设计年处理万吨乙醇的换热器设计.docVIP

PAGE 1 化工原理课程设计说明书 课题名称：年处理7万吨乙醇的换热器设计 目 录 TOC \o "1-2" \h \z \u \l "_Toc327869608"摘 要 1 \l "_Toc327869609"Abstract 2 \l "_Toc327869610"第一章 设计内容 3 \l "_Toc327869611"1.1概述 3 \l "_Toc327869612"1.2固定管板式换热器的优缺点 4 \l "_Toc327869613"1.3固定管板式换热器的构成及结构特点 4 \l "_Toc327869614"1.4固定管板式换热器的结构原理 4 \l "_Toc327869615"第二章 设计计算 5 \l "_Toc327869616"2.1确定设计方案 5 \l "_Toc327869617"2.2确定物性数据 5 \l "_Toc327869618"2.3初选总传热系数 7 \l "_Toc327869619"2.4计算传热面积 8 \l "_Toc327869620"2.5工艺结构尺寸 8 \l "_Toc327869621"第三章 换热器核算 14 \l "_Toc327869620"3.1面积核算 14 \l "_Toc327869620"3.2压降核算 16 \l "_Toc327869623"附表及符号说明 20 \l "_Toc327869623"设计小结与致谢 21 \l "_Toc327869625"参考文献 22 PAGE 1 摘要 换热器是将热流体的部分热量传递给冷流体的设备，又称 热交换器。换热器是实现化工生产过程中热量交换和传递不可缺少的设备。在石油、化工、轻工、制药、能源等工业生产中，常常用作把低温流体加热或者把高温流体冷却，把液体汽化成蒸汽或者把蒸汽冷凝成液体。根据统计，热交换器的吨位约占整个工艺设备的20%有的甚至高达30%，其重要性可想而知。 我们这次课程设计的任务是设计一套固定管板式换热器。乙醇为热流体,水为冷流体。乙醇进口温度为,出口温度为在这次设计过程包括设计方案的确定，设计计算（总传热系数选择 传热面积及其工艺尺寸的计算），然后进行面积与压降核算经过反复核算最终确定出了换热器的各个参数。面积裕度为24.7%符合面积裕度范围（15%-25%）,管程压降为2028.6pa<105pa,壳程压降为5722pa<105pa符合设计要求。紧接着我们开始编写说明书，用CAD画换热器装配图。最终完成满足要求的设计方案。 关键词：固定管板式换热器 设计 Abstract The heat exchanger?is?part of?thermal fluid heat?transfer?to the?cold fluid equipment,?also called heat?exchanger.?Heat exchanger?is?the realization of chemical processes of heat?exchange and transmission of essential?equipment the petroleum,?chemical industry,?light industry,?pharmaceuticals,?energy and other industrial production,?often?used for?the?cryogenic fluid?heating?or?cooling the?high temperature fluid,?the liquid vaporized into steam or the?steam is condensed into?liquid.?According to statistics,?heat exchanger?tonnage?about the entire?process equipment?20%,?some even as high as 30%,?one can imagine?the importance. We this course design task is to design a set of fixed tube plate heat exchanger Ethanol as the hot fluid, water as cooling fluid. Ethanol inlet temperature, outlet temperature in determining this design process including design, design calculation (ca