6-2附录二 能量平衡书

能量平衡书陕西北元化工集团股份有限公司化工分公司15万吨/年醋酸乙烯项目 能量平衡书目录1 概述12 热量衡算原理13 热量衡算任务24 热量衡算24.1醋酸乙烯制备工段24.1.1 反应器热量衡算24.1.2 泵热量衡算34.1.3换热器热量衡算44.1.4气液分离器热量衡算74.2循环乙炔精制工段84.2.1 塔热量衡算84.2.2换热器热量衡算124.2.3 泵热量衡算134.2.4气液分离器热量衡算164.3循环醋酸和醋酸乙烯精制工段164.3.1 塔热量衡算164.3.2换热器热量衡算195 总结2122化育臻善 工于至诚能量平衡书1 概述本项目为陕西北元化工集团股份有限公司化工分公司配套建设15万吨/年醋酸乙烯项目。在已确定化学生产工艺和流程后，由定性阶段转向定量阶段。在全工艺段中伴随着物料从一个体系或单元进入另一个体系或单元，在发生质量传递的同时也伴随着能量的消耗、释放和转化。其中的能量变换数量关系可以从能量衡算求得，对于新设计的车间，可以由此确定设备的热负荷。再根据设备的热负荷大小、所处理物料的性质及工艺要求选择恰当的设备。总之，通过下述能量衡算，可以在后续设计工作中提高热量的利用率，为降低能耗提供主要依据。2 热量衡算原理工程依据化工设计中关于热量衡算的基本思想和要求，遵循基本规范与实际工艺相结合的原则，进行热量衡算书的编制。其中一个主要依据是能量平衡方程： 其中，表示输入设备热量的总和；表示输出设备热量的总和；表示损失热量的总和。对于连续系统：Q + W =Hout - Hin其中， Q设备的热负荷。 W输入系统的机械能。Hout离开设备的各物料焓之和。Hin进入设备的各物料焓之和。在进行全厂热量衡算时，是以单元设备为基本单位，考虑由机械能转换、化学反应释放和单纯的物理变化带来的热量变化。最终对全工艺段进行系统级的热量平衡计算，进而用于指导节能降耗设计工作。3 热量衡算任务在进行本项目装置的热量衡算中，主要通过定量计算完成下述基本任务：确定工艺单元中物料输送机械（如泵）所需要的功率，以便于进行设备的设计和选型；确定精馏等单元操作中所需要的热量或冷量以及传递速率，计算换热设备的尺寸，确定加热剂和冷却剂的消耗量，为后续设计中比如供汽、供冷、供水等专业提供设备条件；确定为保持一定反应温度所需移除或者加入的热传递速率，指导反应器的设计和选型；提高热量内部集成度，充分利用余热，提高能量利用率，降低能耗；最终计算出总需求能量和能量的费用，并由此确定工艺过程在经济上的可行性。4 热量衡算4.1醋酸乙烯制备工段4.1.1 反应器热量衡算（1）列管式固定床反应器表4-1 流股焓变计算表UnitInOutMole FlowKMOL/HR2419.4962208.066Mass FlowKG/HR91250.3691250.36Volume FlowCUM/HR88748.6881520.13TemperatureC180180PressureBAR11Vapor Fraction11Liquid Fraction00Solid Fraction00Molar EnthalpyKCAL/MOL1.84850-0.413893Mass EnthalpyKCAL/KG49.0129-10.01535Enthalpy FlowGCAL/HR4.47245-0.91390Molar EntropyCAL/MOL-K-0.39911-3.489916Mass EntropyCAL/GM-K-0.010582-0.084449表4-2 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error0-5.377004.47245-0.913900.00174.1.2 泵热量衡算（1）乙炔鼓风机表4-3 流股焓变计算表UnitInOutMole FlowKMOL/HR1590.3711590.371Mass FlowKG/HR41642.0641642.06Volume FlowCUM/HR38073.1424478.49TemperatureC17.463.71PressureBAR11.8Vapor Fraction11Liquid Fraction00Solid Fraction00Molar EnthalpyKCAL/MOL53.2678553.76087Mass EnthalpyKCAL/KG2034.3772053.206Enthalpy FlowGCAL/HR84.7156585.49974Molar EntropyCAL/MOL-K13.4712813.88880Mass EntropyCAL/GM-K0.5144880.530434表4-4 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error0.78409084.7156585.499740（2）反应气鼓风机表4-5 流股焓变计算表UnitInOutMole FlowKMOL/HR2208.0662208.066Mass FlowKG/HR91250.3691250.36Volume FlowCUM/HR81520.1357680.83TemperatureC180205.9PressureBAR11.5Vapor Fraction11Liquid Fraction00Solid Fraction00Molar EnthalpyKCAL/MOL-0.4138930.093670Mass EnthalpyKCAL/KG-10.015352.266616Enthalpy FlowGCAL/HR-0.9139040.206829Molar EntropyCAL/MOL-K-3.489916-3.191204Mass EntropyCAL/GM-K-0.084449-0.077220表4-6 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error1.1207330-0.9139040.20682904.1.3换热器热量衡算（1）醋酸蒸发器表4-7 流股焓变计算表UnitInOutMole FlowKMOL/HR837.5837.5Mass FlowKG/HR50111.8050111.80Volume FlowCUM/HR51.5228110648.13TemperatureC96136PressureBAR11.75Vapor Fraction00.99Liquid Fraction10.01Solid Fraction00Molar EnthalpyKCAL/MOL-112.1301-105.1984Mass EnthalpyKCAL/KG-1873.989-1758.142Enthalpy FlowGCAL/HR-93.90896-88.10367Molar EntropyCAL/MOL-K-69.16485-52.11250Mass EntropyCAL/GM-K-1.155927-0.870937表4-8 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error05.80529-93.90896-88.103670（2）混合器预热器表4-9 流股焓变计算表UnitInOutMole FlowKMOL/HR2419.4962419.496Mass FlowKG/HR91250.3691250.36Volume FlowCUM/HR37564.9788748.68TemperatureC101180PressureBAR1.751Vapor Fraction11Liquid Fraction00Solid Fraction00Molar EnthalpyKCAL/MOL-0.6903211.848503Mass EnthalpyKCAL/KG-18.3038049.01291Enthalpy FlowGCAL/HR-1.6702294.472446Molar EntropyCAL/MOL-K-7.594095-0.399110Mass EntropyCAL/GM-K-0.201357-0.010582表4-10 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error06.142675-1.6702294.4724460（3）反应气冷却器表4-11 流股焓变计算表UnitInOutMole FlowKMOL/HR2208.0662208.066Mass FlowKG/HR91250.3691250.36Volume FlowCUM/HR57680.8320629.52TemperatureC20610PressureBAR1.51.5Vapor Fraction10.60390Liquid Fraction00.39610Solid Fraction00Molar EnthalpyKCAL/MOL0.093670-6.956886Mass EnthalpyKCAL/KG2.266616-168.3419Enthalpy FlowGCAL/HR0.206829-15.36126Molar EntropyCAL/MOL-K-3.191204-22.58859Mass EntropyCAL/GM-K-0.077220-0.546596表4-12 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error015.568090.206829-15.3612604.1.4气液分离器热量衡算（1）液滴分离器表4-13 流股焓变计算表UnitInOutMole FlowKMOL/HR837.5829.1258.375Mass FlowKG/HR50111.8049608.30503.4917Volume FlowCUM/HR10648.1410647.590.549611TemperatureC136136136PressureBAR1.751.751.75Vapor Fraction0.9910Liquid Fraction0.0101Solid Fraction000Molar EnthalpyKCAL/MOL-105.1984-105.1349-111.4872Mass EnthalpyKCAL/KG-1758.142-1757.165-1854.463Enthalpy FlowGCAL/HR-88.10367-87.16996-0.933707Molar EntropyCAL/MOL-K-52.11250-51.97021-66.19951Mass EntropyCAL/GM-K-0.870937-0.868601-1.101153表4-14 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error0088.1036788.103670（2）反应气初步分离罐表4-15 流股焓变计算表UnitInOutMole FlowKMOL/HR2208.0661395.731812.335Mass FlowKG/HR91250.3639265.2351985.13Volume FlowCUM/HR20629.5230428.6750.97042TemperatureC102020PressureBAR1.51.11.1Vapor Fraction0.6010Liquid Fraction0.4001Solid Fraction000Molar EnthalpyKCAL/MOL-6.95688648.29613-100.9668Mass EnthalpyKCAL/KG-168.34191716.746-1577.736Enthalpy FlowGCAL/HR-15.3612667.40842-82.01881Molar EntropyCAL/MOL-K-22.5885910.68636-75.51324Mass EntropyCAL/GM-K-0.5465960.379860-1.179992表4-16 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error00-15.36126-14.610390.054.2循环乙炔精制工段4.2.1 塔热量衡算（1）酸洗塔表4-17 流股焓变计算表UnitInOutMole FlowKMOL/HR1395.731201219.5751377.156Mass FlowKG/HR39265.2312084.3913797.3237552.3Volume FlowCUM/HR26792.4811.2022713.3786931910.8TemperatureC322027.343133.4128PressureBAR1.31.21.2121.1Vapor Fraction1001Liquid Fraction0110Solid Fraction0000Molar EnthalpyKCAL/MOL48.43096-109.2250-101.079849.2587Mass EnthalpyKCAL/KG1721.539-1816.743-1608.621806.47Enthalpy FlowGcal/hr67.59661-21.95423-22.194667.8370Molar EntropyCAL/MOL-K10.81075-58.49031-60.927112.3816Mass EntropyCAL/GM-K0.384282-0.972871-0.969610.454069表4-18 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error0045.642445.64240（2）水洗塔表4-19 流股焓变计算表UnitInOutMole FlowKMOL/HR1377.156101.2951372.485105.966Mass FlowKG/HR37552.31849.22935746.233655.295Volume FlowCUM/HR31910.81.90195733657.483.63794TemperatureC33.412840.143223.720125.0042PressureBAR1.1311.088Vapor Fraction1010Liquid Fraction0101Solid Fraction0000Molar EnthalpyKCAL/MOL49.2587-67.344350.4957-78.22618Mass EnthalpyKCAL/KG1806.47-3688.921938.80-2267.758Enthalpy FlowGcal/hr67.8370-6.821769.3046-8.2893Molar EntropyCAL/MOL-K12.3816-37.8556813.2558-43.07313Mass EntropyCAL/GM-K0.454069-2.073620.50896-1.248680表4-20 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error0061.015361.01530（3）脱水塔表4-21 流股焓变计算表UnitInOutMole FlowKMOL/HR105.9665.705657.874142.3865Mass FlowKG/HR3655.295157.52451067.2292430.542Volume FlowCUM/HR3.63794174.13881.127062.59458TemperatureC25.00426060118.455PressureBAR1.0880.90.91.132Vapor Fraction0100Liquid Fraction1011Solid Fraction0000Molar EnthalpyKCAL/MOL-78.2261821.9055-66.4935-109.6284Mass EnthalpyKCAL/KG-2267.758793.431-3605.83-1911.82Enthalpy FlowGcal/hr-8.28930.1250-3.8482-4.6468Molar EntropyCAL/MOL-K-43.073136.70967-36.60091.42E+27Mass EntropyCAL/GM-K-1.2486800.24303-1.984802.47E+25表4-22 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error00-8.2893-8.37-0.01（4）二氧化碳吸收塔表4-23 流股焓变计算表UnitInOutMole FlowKMOL/HR1372.4855.705657.874142.3865Mass FlowKG/HR35746.23157.52451067.2292430.542Volume FlowCUM/HR33657.48174.13881.127062.59458TemperatureC25.00426060118.455PressureBAR1.0880.90.91.132Vapor Fraction0100Liquid Fraction1011Solid Fraction0000Molar EnthalpyKCAL/MOL-78.2261821.9055-66.4935-109.6284Mass EnthalpyKCAL/KG-2267.758793.431-3605.83-1911.82Enthalpy FlowGcal/hr-8.28930.1250-3.8482-4.6468Molar EntropyCAL/MOL-K-43.073136.70967-36.60091.42E+27Mass EntropyCAL/GM-K-1.2486800.24303-1.984802.47E+25表4-24 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error00-8.2893-8.37-0.01（5）二氧化碳解吸塔表4-25 流股焓变计算表UnitInOutMole FlowKMOL/HR114.7178.271106.686Mass FlowKG/HR3932.551067.2293747.72Volume FlowCUM/HR3.48189248.9993.76307TemperatureC-12791.135104.781PressureBAR1.211.016Vapor Fraction110Liquid Fraction001Solid Fraction000Molar EnthalpyKCAL/MOL-73.3936-20.0175-74.8099Mass EnthalpyKCAL/KG-2140.97-895.717-2129.60Enthalpy FlowGcal/hr-8.14672-0.16556-7.98116Molar EntropyCAL/MOL-K7.42E+330.981927-63.7703Mass EntropyCAL/GM-K2.16E+320.043938-1.81534表4-26 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error00-8.14672-8.1467204.2.2换热器热量衡算（1）冷凝器表4-27 流股焓变计算表UnitInOutMole FlowKMOL/HR57.874157.8741Mass FlowKG/HR1067.231067.23Volume FlowCUM/HR1.127061.10342TemperatureC6040PressureBAR0.91Vapor Fraction00Liquid Fraction11Solid Fraction00Molar EnthalpyKCAL/MOL-66.4935-66.8349Mass EnthalpyKCAL/KG-3605.83-3624.34Enthalpy FlowGCAL/HR-3.84825-3.86801Molar EntropyCAL/MOL-K-36.6009-37.6591Mass EntropyCAL/GM-K-1.98480-2.04219表4-28 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error-0.019760-3.84825-3.868010（2）吸收剂冷却器表4-29 流股焓变计算表UnitInOutMole FlowKMOL/HR106.6858106.6858Mass FlowKG/HR3747.7203747.720Volume FlowCUM/HR3.763073.82588TemperatureC104.78150PressureBAR1.0161Vapor Fraction00Liquid Fraction11Solid Fraction00Molar EnthalpyKCAL/MOL-74.8099-71.3784Mass EnthalpyKCAL/KG-2129.60-2031.92Enthalpy FlowGCAL/HR-7.98116-7.61506Molar EntropyCAL/MOL-K-63.77036.52E+33Mass EntropyCAL/GM-K-1.815341.86E+32表4-30 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error00.3661-7.98116-7.6150604.2.3 泵热量衡算（1）乙炔进料鼓风机表4-31 流股焓变计算表UnitInOutMole FlowKMOL/HR1395.7331395.733Mass FlowKG/HR39265.2339265.23Volume FlowCUM/HR30428.6726792.48TemperatureC2031.963PressureBAR1.11.3Vapor Fraction11Liquid Fraction00Solid Fraction00Molar EnthalpyKCAL/MOL48.296148.4310Mass EnthalpyKCAL/KG1716.751721.54Enthalpy FlowGCAL/HR67.408467.5966Molar EntropyCAL/MOL-K10.686410.8108Mass EntropyCAL/GM-K0.379860.38428表4-32 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error00.188267.408467.59660（2）乙炔气鼓风机表4-33 流股焓变计算表UnitInOutMole FlowKMOL/HR1406.591406.59Mass FlowKG/HR36324.2636324.26Volume FlowCUM/HR39945.0121778.50TemperatureC35.895102.663PressureBAR0.92Vapor Fraction11Liquid Fraction00Solid Fraction00Molar EnthalpyKCAL/MOL47.782148.5100Mass EnthalpyKCAL/KG1850.281878.46Enthalpy FlowGCAL/HR67.210068.2338Molar EntropyCAL/MOL-K13.427313.9866Mass EntropyCAL/GM-K0.519950.54161表4-34 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error1.0238067.210068.23380（3）水洗塔进料泵表4-35 流股焓变计算表UnitInOutMole FlowKMOL/HR114.717114.717Mass FlowKG/HR3932.553932.55Volume FlowCUM/HR3.793303.48189TemperatureC24.887-127.045PressureBAR0.9321.2Vapor Fraction00Liquid Fraction11Solid Fraction00Molar EnthalpyKCAL/MOL-73.3943-73.3936Mass EnthalpyKCAL/KG-2140.99-2140.97Enthalpy FlowGCAL/HR-8.4196-8.4195Molar EntropyCAL/MOL-K-66.99107.42E+33Mass EntropyCAL/GM-K-1.954202.16E+32表4-36 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error0.00010-8.4196-8.419504.2.4气液分离器热量衡算（1）乙炔气液滴分离器表4-37 流股焓变计算表UnitInOutMole FlowKMOL/HR1406.591328.6677.93Mass FlowKG/HR36324.2634829.941494.32Volume FlowCUM/HR21778.508981.111.64702TemperatureC102.662020PressureBAR23.53.5Vapor Fraction110Liquid Fraction001Solid Fraction000Molar EnthalpyKCAL/MOL48.510053.0232-54.8178Mass EnthalpyKCAL/KG1878.462022.68-2858.99Enthalpy FlowGCAL/HR68.233870.4497-2.2723Molar EntropyCAL/MOL-K13.986610.9423-34.3274Mass EntropyCAL/GM-K0.541610.41741-1.79033表4-38 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（GCAL/HR）Hout（GCAL/HR）Error0068.233868.233804.3循环醋酸和醋酸乙烯精制工段4.3.1 塔热量衡算（1）脱乙醛塔表4-39 流股焓变计算表UnitInOutMole FlowKMOL/HR812.335181.680219.57534.444208.274970.872Mass FlowKG/HR51985.1314828.7613797.321112.9615575.4963922.77Volume FlowCUM/HR50.971416.522717.1108839.511916.775469.2228TemperatureC2048.548176.9782020107.383PressureBAR1.41.11.2111.192Vapor Fraction000100Liquid Fraction111011Solid Fraction000000Molar EnthalpyKCAL/MOL-100.966-81.365-101.079834.8101-77.1479-101.5194Mass EnthalpyKCAL/KG-1577.72-996.881-1608.621077.30-1031.62-1541.90Enthalpy FlowGcal/hr-82.0182-14.7825-22.19461.1990-16.0679-98.5624Molar EntropyCAL/MOL-K-75.5124-87.0660-61.82764.6133-83.1177-61.5360Mass EntropyCAL/GM-K-1.17998-1.06672-0.983940.14277-1.11144-0.93462表4-40 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error00-118.9953-113.4313-0.05（2）乙醛萃取塔表4-41 流股焓变计算表UnitInOutMole FlowKMOL/HR558.570516.7571541.8134Mass FlowKG/HR10330.46569.5149760.941Volume FlowCUM/HR10.47353476.16610.6385TemperatureC19.64973.664100.739PressureBAR111.04Vapor Fraction010Liquid Fraction101Solid Fraction000Molar EnthalpyKCAL/MOL-67.0998-18.5617-66.9324Mass EnthalpyKCAL/KG-3628.10-546.152-3715.30Enthalpy FlowGcal/hr-37.4800-1.2151-36.2649Molar EntropyCAL/MOL-K-39.0452-8.3534-34.9799Mass EntropyCAL/GM-K-2.11118-0.24579-1.94168表4-42 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error00-37.4800-37.48000（3）醋酸乙烯精制塔表4-43 流股焓变计算表UnitInOutMole FlowKMOL/HR970.872199.607771.265Mass FlowKG/HR63922.7717164.0746758.7Volume FlowCUM/HR64.467120.321751.5333TemperatureC60.04685.046140.789PressureBAR21.52Vapor Fraction000Liquid Fraction111Solid Fraction000Molar EnthalpyKCAL/MOL-107.312-81.2472-111.187Mass EnthalpyKCAL/KG-1629.88-944.853-1833.99Enthalpy FlowGcal/hr-104.186-18.431-85.755Molar EntropyCAL/MOL-K-75.5147-86.7074-66.0972Mass EntropyCAL/GM-K-1.14693-1.00835-1.09025表4-44 热量平衡计算一览W（Gcal/hr）Q（Gcal/hr）Hin（Gcal/hr）Hout（Gcal/hr）Error00-104.186-104.1860（4）醋酸精制塔表4-45 流股焓变计算表UnitInOutMole FlowKMOL/HR10640292.532.5325Mass FlowKG/HR180.152838800.6417434.771967.2119578.82Volume FlowCUM/HR0.18037542.7625918.52982.079420.7054TemperatureC20140.789113