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1、 沈阳化工大学科亚学院 本科毕业设计 题 目： 流量为200t/h双管程固定管板式换热器 专 业： 过程装备与控制工程 班 级： 1201班 学生姓名： 宋雅诗 指导教师： 汤方丽 论文提交日期：2016 年 月 日 论文答辩日期：2016 年 6 月 6 日毕业设计（论文）任务书过程装备与控制工程1201班学生：000毕业设计（论文）题目：流量为200t/h双管程固定管板式换热器毕业设计（论文）内容： 有关换热器综述一篇； 计算书说明书一份； 绘制工程图折合A1号图四张以上； 毕业设计（论文）专题部分： 固定管板式换热器起止时间：2016年12月2016年6月指导教师： 签字 年 月 日 课
2、题名称流量为200t/h双管程固定管板式换热器设计者宋雅诗图号GK3122020118-01设计参数管口表容器类别符号公称尺寸用途或名称参数名称壳程管程a450进油管工作压力MPa1.62b450出油管设计压力MPa1.652.5c200热水出口工作温度2590d设计温度15095e20放气口介质油水f20放气口介质特性h200冷水进口推荐材料Q34520钢g20排液口腐蚀余量mm20.3m20排液口焊接接头系数0.850.85程数12传热面积465465换热管推荐尺寸管子与管板连接方式强度焊接强度焊接设计参数： 壳程：壳程介质为热油，由25加热到70； 管程： 管程为水，入口温度为160，出
3、口温度为90；流量为200t/h 结构为固定管板式换热器内容摘要本设计为固定管板式换热器，由管箱、壳体、管板、管子等零部件组成。其结构较紧凑，排管较多，在相同直径情况下面积较大制造较简单。本设计采用单壳程，双管程。管程工作压力2MPa，工作温度90摄氏度，介质为水。壳程工作压力1.6MPa，工作温度70摄氏度，介质为油。固定管板式换热器的设计包括：管子的规格和排列方式、圆筒、封头、管板的材料选择及厚度设计，拆流板、防冲板的选择等。首先管子的选择是以清洗方面及合理使用管材为原则。管子在管板上的排列方式为三角形排列。因为三角形排列时，管板的强度高、流体短路机会少，且相同管程内可排列更多的管子。壳体
4、厚度计算式是由圆筒薄膜应力准则推导出的。其最小壁厚应不小于封头内径的0.15%。管板是管壳式换热器中最重要的部件之一，在选材时除力学性能外，还应考虑流体的腐蚀性的影响。在计算厚度时，要在满足强度要求的前提下，尽量减少管板的厚度。拆流板最常用的为圆缺型挡板，切去的弓形高度一般取外壳内径的20%25%。关键字： 换热器 管板Abstract Change a hot machine, is hot parts of calorieses of the fluid deliver to the equipments of cold fluid, and then call a heat exchan
5、ger.Changing the hot machine is the in general use equipments of chemical engineering, petroleum, power and food and other many industrial sections, occupy an important position in the production.Produce in the chemical engineering in change hot machine as heating apparatus, water cooler, congealed
6、machine, evaporate a machine and again Fei machine etc., apply more extensively. This design topic floats a type to change for the 105 ts/h vapor-water for the discharge hot machine, float a type to change hot machine of a carry to take care of plank and hull body fix, but another one the tube plank
7、 carrying can float in the hull freedom inside the body, hull body and control free to inflation, past be two difference in temperatures that lie quality more big, control to produce a difference in temperature in response to the dint with of hull bodies not.Float a head to carry to design can disma
8、ntle structure, making to control can easily insert or draw out a hull body.(Can also design can not dismantle of).Fix, cleaned to provide convenience for check like this.But should change hot machine structure more complicated, and float to carry a small cover can not know to reveal a circumstance
9、while operating, consequently need to specially notice it to seal completely while installing.The floating the advantage that a type changes a hot machine can draw out for controling and clean a tube, hull distance by convenience;Lie a quality difference in temperature to be free from restriction;Ca
10、n under the heat, high pressure work, the general temperature is smaller than to equal 450 degrees, the pressure is smaller than to equal 6,400,000,000,000 Pas;Can used for knotting the dirt more serious situation;Can used for taking care of a distance to easily decay situation.The weakness leaks fo
11、r being small to float inside easy occurrence;Metal material consumes to have great capacity, the cost is 20% in height;The structure is complicated.Compute in the traditional craft in include to transmit heat an area calculation, spread a calories calculation and transmit heat coefficient to really
12、 settle and change hot path inside the tube and change hot tube model number of choice, and transmit heat coefficient, press to decline and checking of wall calculate etc. problem.In strength compute win main discussion of is a tube body, tube box and head, take care of plank thickness calculation a
13、nd fold to flow plank, method orchid and mat a slice and connector and, box off the design of zero partses like plank,etcs, also need to carry on some strength pit in the school.Have to consider floating path Do outside a tube knothole while designing.Its outside paths turn to should be smaller than
14、 path Di inside the hull body, generally recommend float mural the cleft inside a tube plank and hull body b 1=35 mms.Like this, after being the hook turn of floating a to tore down, can immediately will control from the hull body inside draw out.In order to in carry on check to fix, clean.Float the cranium just can carry on assemble after controling to pack into, so should consider promising to float necessary space for cranium to assemble in the design.This design is according to the GB151 tube hull the type change hot machin
