附录1-物料平衡书

中石化镇海炼化分公司年产20万吨醋酸乙烯酯生产分厂 物料平衡书2019 “东华科技-恒逸石化杯” 第十三届全国大学生化工设计竞赛 中石化镇海炼化分公司年产20万t醋酸乙烯酯生产分厂物料平衡书VAc想要变得可爱队严琦斌 吴徐冰 黄蓓 卢润芝 王要辉指导老师：胡晓萍目录1.概述12.物料衡算的目的与原理13.各工段物料衡算23.1醋酸乙烯酯合成工段23.2产品分离预处理工段53.3气体精制工段83.4醋酸乙烯酯精制工段114.总流程物料衡算175.总结241.概述本项目是中石化镇海炼化分公司的醋酸乙烯酯分厂项目。该项目采用乙烯气相氧化法路线将乙烯、醋酸和氧气合成醋酸乙烯酯，再将合成的粗品醋酸乙烯酯经吸收、精馏等处理得到高纯醋酸乙烯酯。产品纯度达到99.8%，为优等品，产量为20万吨/年，副产物为乙醛。设计过程中利用Aspen Plus对全流程进行模拟，并在此基础上完成物料衡算、能量衡算，Aspen Plus模拟流程如图1所示。图1全流程模拟图工艺包括醋酸乙烯酯合成、产品分离预处理、气体吸收处理、醋酸乙烯酯精制四个工段设备及其参数的确定。本场所需主要设备有反应器、气液分离器、吸收塔、精馏塔、泵、压缩机、换热器、蒸发器、搅拌釜等，涉及到的原料有乙烯、醋酸等，输入整个系统的能量主要有电能、加热介质带入的能量等，输出的能量主要有冷却剂带走的能量和输出物料的焓。2.物料衡算的目的与原理工艺设计中，物料衡算是在工艺流程确定后进行的。目的是根据原料与产品之间的定量转化关系，计算原料的消耗量，各种中间产品、产品和副产品的产量，生产过程中各阶段的消耗量以及组成，进而为热量衡算、其他工艺计算及设备计算打基础。系统的物料衡算以质量守恒为理论基础，研究某一系统内进出物料量及组成的变化，即： 系统累积的质量=输入系统的质量-输出系统的质量+反应生成的质量-反应消耗的质量假设系统无泄漏，有当系统无化学反应发生时，有在稳定状态下，有3.各工段物料衡算3.1醋酸乙烯酯合成工段图2醋酸乙烯酯合成工段工艺流程图表1 醋酸乙烯酯合成工段总物料衡算表项目单位进口物料出口物料乙烯进料乙烯循环醋酸进料醋酸循环氧气进料I氧气进料II反应器出口产物0102010101060420011001120113PhaseVapor PhaseVapor PhaseLiquid PhaseLiquid PhaseVapor PhaseVapor PhaseVapor PhaseTemperatureC2555.3329708425202.5645409155155157.8199036Pressurebar8.78.78.758.658.558.157.64777025Volume Flowcum/hr824.92936716148.16892915.93055093904.8438912444.3760628485.605911913375.3489Mass Flowskg/hr8551.07890866731.4585516579.1012415685.335553414.943363557.21696114521.2645C2H4kg/hr8550.09100536946.70227000036976.00618O2kg/hr0.0975341682313.100527003414.943363557.216962316.763234CH3COOHkg/hr00.11595850916496.2057415377.47830015384.51043H2Okg/hr0.219646405323.653854982.89550622302.1240067006589.26459CO2kg/hr0.67072190626990.15301000029337.82248N2kg/hr0000000VINYL-01kg/hr079.9699392405.5496684720023593.74943H3O+kg/hr0000000HCO3-kg/hr0000000CH3COO-kg/hr0000000CO3-kg/hr0000000OH-kg/hr0000000ME-ACkg/hr00000112511004.101972062ET-ACkg/hr00.07978573300.10502083200116.6722453AHkg/hr077.4414292605.52E-0600193.9311716EGDAkg/hr0000.078426635007.807190177ACROL-01kg/hr00.05760281806.61E-06000.635523733K2CO3kg/hr0000000KHCO3kg/hr0000000K+kg/hr0000000KOHkg/hr0000000AIRkg/hr0000000ETHYL-01kg/hr0000000TOTALkg/hr114519.1346114521.26453.2产品分离预处理工段图3产品分离预处理工段工艺流程图表2 产品分离预处理工段全物料衡算表项目单位进口物料出口物料闪蒸罐进口物料酸洗塔醋酸进料水洗塔水进料闪蒸罐液相出料酸洗塔液相出料水洗塔液相出料水洗塔气相出料0203041402060202020402080207PhaseLiquid PhaseLiquid PhaseLiquid PhaseLiquid PhaseLiquid PhaseVapor PhaseTemperatureC5050255061.4662367.6136760.1825Pressurebar7.54777037.56.97.547777.476.8Volume Flowcum/hr7559.372319.967221.42220438.073826.472514.9860398403.008Mass Flowskg/hr114521.26200601412.2936357.3425315.564815.83669504.82C2H4kg/hr36976.006008.0473742.690870.51835936964.75O2kg/hr2316.7632001.1834841.2241550.2223242314.133CH3COOHkg/hr15384.5119656.63015211.515404.114423.3472.188875H2Okg/hr6589.2646386.16411412.296072.041803.4983339.86531172.314CO2kg/hr29337.82200242.6458184.89530.443628879.84N2kg/hr0000000VINYL-01kg/hr23593.7497.09329014657.758839.39117.2127986.49155H3O+kg/hr0000000HCO3-kg/hr0000000CH3COO-kg/hr0000000CO3-kg/hr0000000OH-kg/hr0000000ME-ACkg/hr4.10197210.00014402.701511.1664280.0324170.20176ET-ACkg/hr116.672250.134232086.4774230.216070.0257370.087252AHkg/hr193.931177.05E-06066.8140938.281064.08081984.75522EGDAkg/hr7.80719029.97873607.8008819.9055570.0794881.14E-12ACROL-01kg/hr0.63552378.45E-0600.3816450.1827020.0084520.062733K2CO3kg/hr0000000KHCO3kg/hr0000000K+kg/hr0000000KOHkg/hr0000000AIRkg/hr0000000ETHYL-01kg/hr0000000TOTALkg/hr135993.5545135993.55453.3气体精制工段图4气体精制工段工艺流程图表4气体精制工段全物料衡算表-1项目单位进口物料水洗塔气相出料解吸塔水进料平衡水碳酸钾溶液进料207306317318PhaseVapor PhaseVapor PhaseLiquid PhaseLiquid PhaseTemperatureC60.1825107.14152020Pressurebar6.81.31.31.3Volume Flowcum/hr8403.008964.39490.1786960.312659Mass Flowskg/hr69504.82720.6112178.3999403.8004C2H4kg/hr36964.75000O2kg/hr2314.133000CH3COOHkg/hr2.188875000H2Okg/hr1172.314720.6112178.3999282.4568CO2kg/hr28879.84001.28E-07N2kg/hr0000VINYL-01kg/hr86.49155000H3O+kg/hr002.80E-071.26E-13HCO3-kg/hr0000.688983CH3COO-kg/hr0000CO3-kg/hr00051.9226OH-kg/hr002.50E-070.192045ME-ACkg/hr0.20176000ET-ACkg/hr0.087252000AHkg/hr84.75522000EGDAkg/hr1.14E-12000ACROL-01kg/hr0.062733000K2CO3kg/hr0000KHCO3kg/hr0000K+kg/hr00068.5399KOHkg/hr0000AIRkg/hr0000ETHYL-01kg/hr0000TOTALkg/hr70807.63403表5气体精制工段全物料衡算表-2项目单位出口物料解吸塔闪蒸废气解吸塔闪蒸废水吸收液废水循环气废水精制气废水乙烯废气循环气310311315323326328331PhaseVapor PhaseLiquid PhaseLiquid PhaseLiquid PhaseLiquid PhaseVapor PhaseVapor PhaseTemperatureC35355035353535.23715Pressurebar1.251.251.213256.76.46.46.7Volume Flowcum/hr913.51180.7008080.3110690.7939410.2651372.3699427508.99Mass Flowskg/hr1925.384689.1394401.7193780.3853260.624217.931666731.46C2H4kg/hr2.7898380.00020700.3475780.15068514.771236946.7O2kg/hr0.068451.43E-0600.0063680.0027470.9252972313.101CH3COOHkg/hr0.0008360.1088490.026391.89810.0384662.32E-060.115959H2Okg/hr37.11075687.3529266.4812774.9617260.2320.100954323.6539CO2kg/hr1873.6970.9312430.0007791.8328120.1467872.12809326990.15N2kg/hr0000000VINYL-01kg/hr6.205130.1158092.93E-050.1871160.0068080.00295779.96994H3O+kg/hr007.57E-110000HCO3-kg/hr0027.694390000CH3COO-kg/hr0000000CO3-kg/hr0038.969860000OH-kg/hr000.0066720000ME-ACkg/hr0.0140680.0012842.02E-050.0021774.24E-053.63E-060.184162ET-ACkg/hr0.0063240.0004361.48E-060.0006968.95E-061.05E-060.079786AHkg/hr5.4867490.6284019.29E-061.1481730.0465710.00309377.44143EGDAkg/hr0000000ACROL-01kg/hr0.0041850.0003311.88E-050.0005692.27E-052.30E-060.057603K2CO3kg/hr0000000KHCO3kg/hr0000000K+kg/hr0068.53990000KOHkg/hr0000000AIRkg/hr0000000ETHYL-01kg/hr0000000TOTALkg/hr70806.64193.4醋酸乙烯酯精制工段图5醋酸乙烯酯精制工段工艺流程图表6 醋酸乙烯酯精制工段全物料衡算表-1项目单位进口物料闪蒸罐液相出料酸洗塔液相出料水洗塔液相出料回收塔水蒸气202204208424PhaseLiquid PhaseLiquid PhaseLiquid PhaseVapor PhaseTemperatureC49.9999977661.4662307367.61366626107.1415009Pressurebar7.547770257.471.3Volume Flowcum/hr38.0737963426.472512374.986038629921.1310722Mass Flowskg/hr36357.3363525315.559494815.836072694.3774857C2H4kg/hr8.0473735722.6908699550.5183591840O2kg/hr1.1834843831.2241554610.2223244130CH3COOHkg/hr15211.4956115404.108664423.3467740H2Okg/hr6072.040859803.498254339.8653126694.3774857CO2kg/hr242.6458322184.895010830.443601950N2kg/hr0000VINYL-01kg/hr14657.747668839.39072417.212787140H3O+kg/hr0000HCO3-kg/hr0000CH3COO-kg/hr0000CO3-kg/hr0000OH-kg/hr0000ME-ACkg/hr2.7015101761.1664280810.0324174090ET-ACkg/hr86.4774150930.216073470.0257370610AHkg/hr66.8140858438.2810564.0808189770EGDAkg/hr7.8008812389.9055574750.0794876210ACROL-01kg/hr0.3816454730.1827016810.0084520340K2CO3kg/hr0000KHCO3kg/hr0000K+kg/hr0000KOHkg/hr0000AIRkg/hr0000ETHYL-01kg/hr0000TOTALkg/hr67183.1094表7 醋酸乙烯酯精制工段全物料衡算表-2项目单位出口物料酸洗塔醋酸进料醋酸精馏塔废液循环醋酸回收塔废液气体回收系统废气VAc产品醋酸乙烯精制塔废液醛酯浓缩塔废气I醛酯浓缩塔废气II乙醛产品乙醛废液414417420426440454455466469472473PhaseLiquid PhaseLiquid PhaseLiquid PhaseVapor PhaseLiquid PhaseLiquid PhaseVapor PhaseVapor PhaseLiquid PhaseLiquid PhaseTemperatureC50165.3241118202.5645409502024.3138350.1728016820.0000167618.4086421.8850213252.35928357Pressurebar7.51.213258.651.224.80.150.397023813.951.31.51.7Volume Flowcum/hr19.967222980.009861113904.84389127.4725769.4682525.353330.150036890.4016107640.2384690.1125658670.001636237Mass Flowskg/hr200609.27096296815685.335557233.517478.552823492.99131.16767973.0093314890.58651587.280714151.408885784C2H4kg/hr0001.19E-2011.2553000.0012866951.51E-053.25E-077.14E-59O2kg/hr0004.07E-252.629922004.21E-051.34E-077.43E-101.13E-68CH3COOHkg/hr19656.629481.53790160215377.47831.7109915.98E-113.12E-431.603838570000H2Okg/hr386.16410250.00429027302.12400677213.8640.408637.00215700.0003482230.000170.0673623480.14296969CO2kg/hr0007.14E-13455.6065002.1912923140.1614050.0249640262.16E-43N2kg/hr00000000000VINYL-01kg/hr7.0932900562.33E-065.5496684721.7800015.95742923448.7544.338314270.0012480840.0006340.0791099960.817394135H3O+kg/hr00000000000HCO3-kg/hr00000000000CH3COO-kg/hr00000000000CO3-kg/hr00000000000OH-kg/hr00000000000ME-ACkg/hr0.0001438066.16E-120.0001125110.2329460.0020923.65977901.26E-056.53E-060.0011021720.004151864ET-ACkg/hr0.1342321071.10E-070.1050208320.6923940.00748230.5465285.225526835.86E-092.98E-092.58E-075.72E-06AHkg/hr7.05E-061.83E-155.52E-0615.179922.6844972.52809600.8150783150.42427287.106152720.43771936EGDAkg/hr9.9787361587.7287686540.07842663500000000ACROL-01kg/hr8.45E-061.77E-136.61E-060.0570860.0009530.50608102.32E-051.21E-050.0020223010.006645018K2CO3kg/hr00000000000KHCO3kg/hr00000000000K+kg/hr00000000000KOHkg/hr00000000000AIRkg/hr00000000000ETHYL-01kg/hr00000000000TOTALkg/hr67183.12065VAc想要变得可爱队4.总流程物料衡算图6 全流程工艺图表8 全流程物料衡算表项目单位进口物料乙烯进料醋酸进料氧气进料I氧气进料II水洗塔水进料 解吸塔水进料平衡水碳酸钾溶液进料回收塔水蒸气010201060110011202060306031703180424PhaseVapor PhaseLiquid PhaseVapor PhaseVapor PhaseLiquid PhaseVapor PhaseLiquid PhaseLiquid PhaseVapor PhaseTemperatureC2525155155251071415009Pressurebar8.78.758.558.156.91.31.31.31.3Volume Flowcum/hr824.929415.93055444.3761485.60591.422204964.39490.1786960.312658985921.1310722Mass Flowskg/hr8551.07916579.13414.9433557.2171412.29720.6112178.3999403.800376694.3774857C2H4kg/hr8550.09100000000O2kg/hr0.09753403414.9433557.21700000CH3COOHkg/hr016496.210000000H2Okg/hr0.21964682.89551001412.29720.6112178.3999282.4568432694.3774857CO2kg/hr0.6707220000001.28E-070N2kg/hr000000000VINYL-01kg/hr000000000H3O+kg/hr0000002.80E-071.26E-130HCO3-kg/hr00000000.6889828120CH3COO-kg/hr000000000CO3-kg/hr000000051.922604930OH-kg/hr0000002.50E-070.1920451250ME-ACkg/hr000000000ET-ACkg/hr000000000AHkg/hr000000000EGDAkg/hr000000000ACROL-01kg/hr000000000K2CO3kg/hr000000000KHCO3kg/hr000000000K+kg/hr000000068.539899850KOHkg/hr000000000AIRkg/hr000000000ETHYL-01kg/hr000000000TOTALkg/hr35511.82表9全流程物料衡算表-2项目单位出口物料解吸塔闪蒸废气解吸塔闪蒸废水吸收液废水循环气废水精制气废水乙烯废气醋酸精馏塔废液回收塔废液气体回收系统废气VAc产品醋酸乙烯精制塔废液醛酯浓缩塔废气I醛酯浓缩塔废气II乙醛产品乙醛废液031003110315302303260328041704260440045404550466046904720473PhaseVapor PhaseLiquid PhaseLiquid PhaseLiquid PhaseLiquid PhaseVapor PhaseLiquid PhaseLiquid PhaseVapor PhaseLiquid PhaseLiquid PhaseVapor PhaseVapor PhaseLiquid PhaseLiquid PhaseTemperatureC353550353535165.3241502024.3138350.172820.0000218.4086421.8850252.35928Pressurebar1.251.251.213256.76.46.41.213251.224.80.150.3970243.951.31.51.7Volume Flowcum/hr913.51183030.7008076110.3110692060.7939410.2651372.3699420.0098617.4725769.4682525.353330.1500370.4016110.2384690.1125660.001636Mass Flowskg/hr1925.383564689.1394246401.719265780.3853260.624217.93169.2709637233.517478.552823492.99131.16773.0093310.58651587.280711.408886C2H4kg/hr2.7898383210.00020702200.3475780.15068514.771201.19E-2011.2553000.0012871.51E-053.25E-077.14E-59O2kg/hr0.0684499731.43E-0600.0063680.0027470.92529704.07E-252.629922004.21E-051.34E-077.43E-101.13E-68CH3COOHkg/hr0.0008361680.1088487040.0263900121.89810.0384662.32E-061.5379021.7109915.98E-113.12E-431.6038390000H2Okg/hr37.11074667687.352863266.4811944774.9617260.2320.1009540.004297213.8640.408637.00215700.0003480.000170.0673620.14297CO2kg/hr1873.6972360.9312429330.000779321.8328120.1467872.12809307.14E-13455.6065002.1912920.1614050.0249642.16E-43N2kg/hr000000000000000VINYL-01kg/hr6.2051298270.1158090562.93E-050.1871160.0068080.0029572.33E-061.7800015.95742923448.7544.338310.0012480.0006340.07911