1、DD 大 学毕业设计（论文）任务书毕业设计（论文）任务书学学 院：院：机械工程学院机械工程学院 题题 目目 1000 甲醇精馏塔设计 论文(设计)内容及要求：一一、毕业设计（论文）原始依据毕业设计（论文）原始依据装置参数：操作压力 常压操作温度 120入塔物料 甲醇塔高 14.96 米，塔径 1.0 米环境 衡阳室外二二、毕业设计（论文）主要内容毕业设计（论文）主要内容设计图纸折合 0#图 3 张以上（其中手工绘图不少于 1 张 1#图）。设计说明书 12000 字以上，并有 20003000 字的外文文献翻译和 300字左右中英文摘要。三三、毕业设计（论文）基本要求毕业设计（论文）基本要求设
2、计符合最新国家标准及行业标准。设计图样达到工程设计施工图水平。四四、毕业设计（论文）进度安排毕业设计（论文）进度安排2013.1.7-2013.1.14 文献查阅2013.1.14-2013.16 开题报告2013.3.1-2013.4.1 总体设计2013.4.2-2013.5.1 强度校核213.5.1-2013.6.1 画图及编写说明书五、主要参考文献五、主要参考文献化工设备设计全书（塔设备）化工原理 化工工艺设计手册 GB150-1998钢制压力容器 指导老师：（签 名）年 月 日毕 业 设 计毕 业 设 计(论 文论 文)题 目：1000 甲醇精馏塔设计 学 院：机械工程学院 指 导
3、 老 师：专 业 班 级：学 号：学 生 姓 名：年 5 月 30 日毕业设计（论文）开题报告毕业设计（论文）开题报告设计（论文）题目甲醇精馏塔设计设计（论文）题目来源自选设计（论文）题目类型工程设计起止时间一、设计（论文）依据及研究意义：甲醇用途广泛，是基础的有机化工原料和优质燃料。主要应用于精细化工，塑料等领域，用来制造甲醛、醋酸、氯甲烷、甲氨、硫酸二甲脂等多种有机产品，也是农药、医药的重要原料之一。甲醇在深加工后可作为一种新型清洁燃料，也加入汽油掺烧。因此，甲醇在现实中需求量是比较大的，甲醇的大量生产也是很有必要的。二、设计（论文）主要研究的内容、预期目标（技术方案、路线）：本次设计的是
4、在常压下操作温度为 120 摄氏度的甲醇精馏塔。设计包括的主要内容：物料衡算、热量衡算、塔设备的工艺设计（塔内径、塔高、封头、筛板、进出口接管及裙座等）等。并对其进行强度计算及校核，绘制图纸等。技术方案及路线：首先进行物料衡算和热量衡算，然后进行塔设备的尺寸计算，最后进行强度计算和校核。三、设计（论文）的研究重点及难点：重点是：物料衡算、热量衡算和塔设备的尺寸计算和确定以及强度计算和校核。难点是：一、由于甲醇精馏过程比较复杂以及现有理论的不完备，其难点为塔内的物料及热量衡算，并对其进行比较准确的计算。二、由于本次设计的塔是满足常压下操作温度为 120 度的生产，其难点是对塔高、塔内径以及壁厚等
5、进行比较优化的设计。三、由于本次设计的塔为高压塔而且考虑了各种载荷，其难点是对塔体以及一些塔内件的强度计算及校核。四、设计（论文）研究方法及步骤（进度安排）：2013.1.7-2013.1.14 了解我们所要设计的试验装置，为进行设计做准备，文献查阅2013.1.14-2013.1.16 开题报告2013.3.1-2013.4.1 算数据，求得设计的各种依据，总体设计2013.4.2-2013.5.1 整理图纸，进行打印，强度校核 2013.5.1-2013.6.1 画图及编写说明五、进行设计（论文）所需条件：1、要有充分的资料（在图书馆查阅与甲醇精馏相关的书籍，进行筛选，选出有用的信息）。2
6、、到工厂进行实习，了解甲醇精馏全流程，并了解甲醇精馏塔塔的基本结构。3、设计所需设计方法、软件、工具等。六、指导教师意见：签名：年 月 日英文论文翻译英文论文翻译英文原文：英文原文：Troubleshooting Distillation Column by Gamma Ray Scanning TechniqueBao Xiaojun,Wei Weishen,Liu Yansheng,Shi Gang and Shen FuThe key laboratory of catalysis,China national petroleum co.,university of petroleum,
7、Beijing 102200,China【Abstract】A digitally controlled three-dimensional gamma-scanning apparatus was developed and used to troubleshoot distillation column in the present investigation.In a 140mm(ID)model column,various malfunction phenomena,both rate and process related conditions and structural pro
8、blems,which way be frequently encountered in the operation of tray and columns,were experimentally simulated and tested with the developed scanning system.The experimental results showed that the scanning spectra can fairly reflect the simulated phenomena.The salient feature of the scanning apparatu
9、s lies in that it integrates the so called grid scan and computer-assisted tomography scan in a single system.It was confirmed that the gamma-scanning technique can serve as an important on-line troubleshooting and maintenance tool.【Keywords】gamma ray scanning,distillation,troubleshooting 1.Introduc
10、tion It has been widely accepted that gamma-scanning or radiation scanning can play a key role in troubleshooting,predictive maintenance and optimization of distillation columns,although its application has been expanded to other chemical engineering equipment now.It was noted that gamma-scanning pr
11、ovides essential data to(1)optimize the performance of columns(and other vessels);(2)extend column runtime;(3)track the performance-deteriorating effects of fouling and solids deposition;and(4)identify maintenance requirements well in advance of scheduled turnarounds.Bao et al.showed that with elabo
12、rately designed scanning apparatus the quantitative information about the hydrodynamic behavior in both tray and packing distillation columns and the solid distribution and coke deposition in the fluid catalytic cracking(FCC)unit could be obtained.The success of these applications demands a better d
13、esign of the scanning system in order to obtain more detailed description of the process to be evaluated.There are three techniques that use radioisotopes,i.e.,grid scanning,tracing,and computer-assisted tomography(CAT)scanning.Their application areas and features had been summarized by Bowman.In th
14、e present contribution,a three dimensional digitally controlled scanning apparatus that integrates grid scanning and CAT scanning in a single system was developed and used for the detailed description of malfunction of distillations and structural problems.In addition to the description of the scann
15、ing apparatus,various spectra of density/count vs.position profiles and corresponding malfunction performances were presented and discussed.2.Scanning apparatusFor troubleshooting scan,a radiation source(Cs137,40mCi)and a NaI scintillation detector are aligned on the opposite sides of a column or ve
16、ssel.They are then synchronously elevated while intensity vs.height profiles are logged.The process change in the column due to its geometrical structure and the flowing media inside it can be distinguished by comparing the empty scan at reduced loadings with an actual troubleshooting scan.The simple scanning apparatus introduced by D.W.Jones and J.B.Jones can be fairly applied for this purpose.For fine process description such as the determination of the three-dimensional gas-solid density dist
