附录1 物料平衡书

物料平衡说明书长城能源年产10万吨醋酸乙烯项目 17 / 17 年产10万吨醋酸乙烯项目 物料平衡说明书概述本项目是PVA废液来源醋酸乙烯生产项目，我们利用原厂聚乙烯醇工艺废液中的醋酸甲酯和甲醇，收取经过一次精馏处理的醇解废液，通过添加醋酸将甲醇转化为醋酸甲酯，再将醋酸甲酯与合成气反应生成EDA，EDA裂解制得醋酸乙烯。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全流程模拟图本流程主要分为四个工段，分别是醋酸甲酯合成抽提工段、EDA合成工段、EDA裂解工段和醋酸乙烯精制工段。本场所需主要设备有反应器、吸收塔、精馏塔、萃取塔、泵、压缩机、换热器等，涉及到的原料有PVA醇解废液、合成气等，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。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，有各工段物料衡算1. 醋酸甲酯合成抽提工段图2醋酸甲酯合成抽提工段工艺流程图表1醋酸甲酯合成抽提工段物料衡算表项目单位进口物料出口物料醋酸原料PVA废液原料醋酸甲酯68%wt醋酸少量共沸物01010103010901050108TemperatureC63.9045.0092.49108.3689.12Pressurebar1.011.013.041.013.24Volume Flowcum/hr40.6471.5097.1525.710.76Mass Flowskg/hr41500.2863119.5681023.5022960.50635.74HOACkg/hr40121.460.0011.4015515.250.00H2Okg/hr122.540.00270.127441.053.03MEOHkg/hr0.5713940.658.294.2146.52MEOACkg/hr8.5249172.3280695.870.00579.63C2H4Okg/hr0.006.600.060.006.54C4H6O3kg/hr1209.700.000.290.000.00COkg/hr0.000.000.000.000.00H2kg/hr0.000.000.000.000.00EDAkg/hr0.000.000.000.000.00CH3Ikg/hr0.010.000.000.000.01VACkg/hr37.480.0037.470.000.00NMPkg/hr0.000.000.000.000.00TOTAL104619.84 104619.74 2. 醋酸回收工段表2醋酸回收工段物料衡算表项目单位进口物料出口物料67%wt醋酸NMP循环醋酸废水少量NMP至母厂醋酸012202010211020402100212TemperatureC-20.7890.00111.00100.7485.00111.00Pressurebar1.011.011.011.011.011.01Volume Flowcum/hr22.000.2414.089.050.071.56Mass Flowskg/hr22960.50235.7413397.568238.1771.891488.62HOACkg/hr15515.250.0013275.02763.731.491475.00H2Okg/hr7441.050.00122.547304.890.0013.62MEOHkg/hr4.210.000.004.210.000.00MEOACkg/hr0.000.000.000.000.000.00C2H4Okg/hr0.000.000.000.000.000.00C4H6O3kg/hr0.000.000.000.000.000.00COkg/hr0.000.000.000.000.000.00H2kg/hr0.000.000.000.000.000.00EDAkg/hr0.000.000.000.000.000.00CH3Ikg/hr0.000.000.000.000.000.00VACkg/hr0.000.000.000.000.000.00NMPkg/hr0.00235.740.00165.3570.390.00TOTAL23196.25 23196.24 3. EDA合成工段图3 EDA合成工段工艺流程图表3 EDA合成工段总物料衡算表项目单位进口物料出口物料碘甲烷合成气醋酸甲酯57%wtEDA醋酸放空030303070123040103160305TemperatureC105.9090.6496.50146.03117.95120.88Pressurebar57.6057.6057.601.011.011.01Volume Flowcum/hr1.34718.3697.91101.7117.911511.96Mass Flowskg/hr2412.9731351.7081023.5094564.7016933.753290.02HOACkg/hr0.000.0011.40688.9016628.7241.40H2Okg/hr0.000.00270.120.000.000.00MEOHkg/hr0.000.008.290.000.577.72MEOACkg/hr0.000.0080695.870.008.52295.67C2H4Okg/hr0.000.000.060.000.000.06C4H6O3kg/hr0.000.000.2956057.58259.8281.84COkg/hr0.0030811.440.000.000.00414.49H2kg/hr0.00540.260.000.000.0018.37EDAkg/hr0.000.000.0037818.220.0016.15CH3Ikg/hr2412.970.000.000.000.012412.96VACkg/hr0.000.0037.470.0036.111.36NMPkg/hr0.000.000.000.000.000.00TOTAL114788.16114788.464. EDA裂解工段图4 EDA裂解工段工艺流程图表4 EDA裂解工段总物料衡算表项目单位进口物料出口物料40%wtEDA45%wt醋酸乙烯乙酸酐040104030402TemperatureC146.0362.77140.01Pressurebar1.013.041.01Volume Flowcum/hr101.7133.2768.67Mass Flowskg/hr94564.7030719.3763845.32HOACkg/hr688.9010218.0535.03H2Okg/hr0.000.000.00MEOHkg/hr0.000.000.00MEOACkg/hr0.000.000.00C2H4Okg/hr0.003719.780.00C4H6O3kg/hr56057.583070.4261607.46COkg/hr0.000.000.00H2kg/hr0.000.000.00EDAkg/hr37818.220.052202.82CH3Ikg/hr0.000.000.00VACkg/hr0.0013711.070.00NMPkg/hr0.000.000.00TOTAL94564.7094564.705. 醋酸乙烯精制工段图5醋酸乙烯精制工段表5醋酸乙烯精制工段总物料衡算表项目单位进口物料出口物料45%wt醋酸乙烯乙酸酐水乙醛溶液未吸收乙醛醋酸乙烯醋酸乙酸酐04030402050805070506050905130515TemperatureC62.56140.0125.0058.0572.0872.64118.8440.00Pressurebar1.011.013.043.043.041.011.011.01Volume Flowcum/hr33.2668.675.6110.890.0415.9011.7962.35Mass Flowskg/hr30719.3763845.325574.039290.000.1713713.5111168.9765966.08HOACkg/hr10218.0535.030.000.000.000.1710217.7235.20H2Okg/hr0.000.005574.035574.020.010.000.000.00MEOHkg/hr0.000.000.000.000.000.000.000.00MEOACkg/hr0.000.000.000.000.000.000.000.00C2H4Okg/hr3719.780.000.003715.900.163.720.000.00C4H6O3kg/hr3070.4261607.460.000.000.000.00949.8863728.01COkg/hr0.000.000.000.000.000.000.000.00H2kg/hr0.000.000.000.000.000.000.000.00EDAkg/hr0.052202.820.000.000.000.000.002202.88CH3Ikg/hr0.000.000.000.000.000.000.000.00VACkg/hr13711.070.000.000.070.0013709.621.370.00NMPkg/hr0.000.000.000.000.000.000.000.00TOTAL100138.73100138.73总流程物料衡算图6全流程工艺图表6全流程进口物料衡算表项目单位进口物料出口物料PVA废液原料NMP合成气碘甲烷水乙醛溶液醋酸乙烯产出醋酸乙酸酐第三工段放空未吸收乙醛放空NMP放空共沸物废水01030201030703030508050705090212051503050506021001080204TemperatureC45.0090.0090.64105.9025.0058.0572.64111.0040.00120.8872.0885.0089.12100.74Pressurebar1.011.0157.6057.603.043.041.011.011.011.013.041.013.241.01Volume Flowcum/hr71.500.24718.361.345.6110.8915.901.5662.351511.960.040.070.769.05Mass Flowskg/hr63119.56235.7431351.702412.975574.039290.0013713.511488.6265966.083290.020.1771.89635.748238.17HOACkg/hr0.000.000.000.000.000.000.171475.0035.2041.400.001.490.00763.73H2Okg/hr0.000.000.000.005574.035574.020.0013.620.000.000.010.003.037304.89MEOHkg/hr13940.650.000.000.000.000.000.000.000.007.720.000.0046.524.21MEOACkg/hr49172.320.000.000.000.000.000.000.000.00295.670.000.00579.630.00C2H4Okg/hr6.600.000.000.000.003715.903.720.000.000.060.160.006.540.00C4H6O3kg/hr0.000.000.000.000.000.000.000.0063728.0181.840.000.000.000.00COkg/hr0.000.0030811.440.000.000.000.000.000.00414.490.000.000.000.00H2kg/hr0.000.00540.260.000.000.000.000.000.0018.370.000.000.000.00EDAkg/hr0.000.000.000.000.000.000.000.002202.8816.150.000.000.000.00CH3Ikg/hr0.000.000.002412.970.000.000.000.000.002412.960.000.000.010.00VACkg/hr0.000.000.000.000.000.0713709.620.000.001