Aspenplus模拟精馏塔说明书

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1、Aspenplus模拟精馏塔说明书一、设计题目根据以下条件设计一座分离甲醇、水、正丙醇混合物的连续操作常压精馏塔：生产能力：100000吨精甲醇/年；原料组成：甲醇70%w,水28.5%w,丙醇1.5%w；产品组成：甲醇$99.9%w；废水组成:水$99.5%w；进料温度：323.15K；全塔压降：0.011MPa；所有塔板Murphree效率0.35。二、设计要求对精馏塔进行详细设计，给出下列设计结果并利用AutoCAD绘制塔设备图,并写出设计说明。(1) .进料、塔顶产物、塔底产物、侧线出料流量；(2) .全塔总塔板数N；最佳加料板位置N；最佳侧线出料位置N；FP(3) .回流比R；(4)

2、 .冷凝器和再沸器温度、热负荷；(5) .塔内构件塔板或填料的设计。三、分析及模拟流程1. 物料衡算(手算)目的:求解Aspen简捷设计模拟的输入条件。内容:(1) 生产能力:一年按8000hr计算，进料流量为100000/(8000*0.7)=17.86t/hr。(2) 原料、塔顶与塔底的组成(题中已给出)：原料组成：甲醇70%w，水28.5%w,丙醇1.5%w；产品：甲醇$99.9%w；废水组成：水$99.5%w。(3) .温度及压降：进料温度：323.15K；全塔压降：0.011MPa；所有塔板Murphree效率0.35。2. 用简捷模块(DSTWU)进行设计计算目的:对精馏塔进行简捷

3、计算，根据给定的加料条件和分离要求计算最小回流比、最小理论板数、理论板数和加料板位置。3. 灵敏度分析目的:研究回流比与塔径的关系(N-R),确定合适的回流比与塔板数;T研究加料板位置对产品的影响，确定合适的加料板位置。方法:作回流比与塔径的关系曲线(N-R),从曲线上找到期望的回流T比及塔板数。4. 用详细计算模块(RadFrac)进行计算目的:精确计算精馏塔的分离能力和设备参数。方法:用RadFrac模块进行精确计算，通过设计规定(DesignSpecs)和变化(Vary)两组对象进行设定，检验计算数据是否收敛，计算出塔径等主要尺寸。5. 塔板设计目的：通过塔板设计(Traysizing)

4、计算给定板间距下的塔径。方法：在Specification表单中输入该塔段(Trayedsection)的起始塔板(Startingstage)和结束塔板(Endingstage)、塔板类型(Traytype)、塔板流型程数(Numberofpasses)、以及板间距(Trayspacing)等几何结构参数。6. 塔板核算目的:计算塔板的热负荷。方法：对第5步的计算结果(塔径)按设计规范要求进行必要的圆整，用RadFrac模块的TrayRating，对塔进行设计核算。7. 设计结果汇总进料塔顶塔底侧线流量/lbmol/h1492717764275温度/c5058.810172操作压力/atm1

5、回流比0.18塔板形式筛板式塔径/m塔板间距/m2.20.5塔板数总塔板数N最佳加料板最佳侧线1位置N出料位置NFP514842一.用简捷模块（DSTWU）进行初步模拟1.连接流股Simulstion1-PlusV7,0-asperONE-ProcessFlwfsheert:WindovjFileEditVieDataToolsRunFlowsheetLibraryWindowCostingHelpT-j7n|DllHlBj电I电I空11射叫的I同TeiI劃甘lYllfel如吨1心1列国卜|b|h|Eolnimnn|Reactois：(|PressureCh-sngersM-snipuldto

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37、设计塔板类型选为筛板塔；板间距(Trayspacing)选为0.5m。图4-1#Simulation1-AfornPlusV7Cl-jspenONE-BlockRADPRAC(RadFrac)TraySizing1-DataBrowser,!1!kIFiIeEditViewDataToc-lsIRumPlatLibraryWindojv口slingHelp图4-2图4-3塔内径：2.18m,圆整为2.2m；降液管截面积：0.1；侧降液管流速：0.01m/s；侧堰长：1584,查文献圆整1598。33Simulation1-AfornPlusV7Cl-jspenONE-BlockRADPRAC(RadFrac)TraySizing1-DataBrowser,!1!kIFiIeEditViewDataToc-lsIRumPlatLibraryWind