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南京扬子石化年产5.7万吨超高分子量PMMA项目 能量平衡计算书南京扬子石化年产6万吨超高分子量PMMA项目 能量平衡计算书目录1.1总述11.2 热量衡算原理11.3 热量衡算任务21.4 热量衡算21.4.1 MAL合成与精制工段21.4.1.1反应器热量衡算21.4.1.2压缩机热量衡算31.4.1.3换热器热量衡算51.4.1.4 塔的热量衡算81.4.2 MMA合成与精制工段101.4.2.1反应器热量衡算101.4.2.2压缩机热量衡算111.4.2.3换热器热量衡算121.4.2.4塔热量衡算131.4.2.5泵热量衡算171.4.3 PMMA合成工段191.4.4.1 反应器热量衡算191.4.3.2 换热器热量衡算211.4.3.4 分离罐的热量衡算211.5总结221.1总述本项目拟建一套年利用异丁烯制备6万吨PMMA的装置,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热量的消耗、释放和转化。其中的热量变换数量关系可以从热量衡算求得,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。总而言之,通过下述热量衡算,可以为后续设计工作中提高热量的利用率,降低能耗提供主要依据。1.2 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热量平衡方程: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:其中,设备的热负荷;输入系统的机械能;离开设备的各物料焓之和;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。1.3 热量衡算任务在进行脱硫并资源化利用装置的热量衡算中,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。1.4 热量衡算1.4.1 MAL合成与精制工段1.4.1.1反应器热量衡算(1)R0101 MAL合成反应器表1-1 热负荷表WQHeat Duty(Gcal/hr)0-5.32表1-2 流股焓变计算表进出口进口出口物流编号105110Temperature C335.35360Pressure bar22Vapor Frac11Mole Flow kmol/hr435.423435.423Mass Flow kg/hr14867.414867.4Volume Flow cum/hr11017.4311017.43Enthalpy Gcal/hr0.78882-4.53表1-3 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0-5.320.78882-4.53 0.11.4.1.2压缩机热量衡算(1)C0101 空气压缩机表1-4 热负荷表WQHeat Duty(Gcal/hr)0.21670表1-5 流股焓变计算表进口出口物流编号101106Temperature C25113.278Pressure bar12Vapor Frac10.599Mole Flow kmol/hr351.324351.324Mass Flow kg/hr14551.3614551.36Volume Flow cum/hr8591.168591.16Enthalpy Gcal/hr-0.000570.216表1-6 热量平衡计算W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.21670-0.000570.2160(2)C0102出料压缩机表1-7 热负荷表WQHeat Duty(Gcal/hr)0.6360表1-8 流股焓变计算表进口出口物流编号111112Temperature C80120Pressure bar27Vapor Frac11Mole Flow kmol/hr435.46435.46Mass Flow kg/hr14867.414867.4Volume Flow cum/hr6351.886351.88Enthalpy Gcal/hr-6.136-5.96表1-9 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.6360-6.136-5.96 0(3)C0103异丁烯压缩机表1-10 热负荷表WQHeat Duty(Gcal/hr)0.004120表1-11 流股焓变计算表进口出口物流编号131133Temperature C38.6468.45Pressure bar12Vapor Frac11Mole Flow kmol/hr6.8976.897Mass Flow kg/hr400400Volume Flow cum/hr174.678174.678Enthalpy Gcal/hr-0.0941-0.09000表1-12 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.004120-0.0941-0.0900001.4.1.3换热器热量衡算(1)E0101蒸发加热器表1-13 热负荷表WQHeat Duty(Gcal/hr)00.1表1-14 流股焓变计算表进出口进口出口物流编号102103104107Temperature C38986215280Pressure bar2222Vapor Frac1111Mole Flow kmol/hr435.46435.46435.46435.46Mass Flow kg/hr14867.414867.414867.414867.4Volume Flow cum/hr11983.811983.811983.811983.8Enthalpy Gcal/hr-4.53-0.150.47-5.15表1-15 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00.1-4.68-4.580(2)E0102 进料加热器表1-16 热负荷表WQHeat Duty(Gcal/hr)00.3196表1-17 流股焓变计算表进出口进口出口物流编号104109Temperature C215277Pressure bar22Vapor Frac11Mole Flow kmol/hr435.42430.443Mass Flow kg/hr14867.414551.36Volume Flow cum/hr8840.896468.781Enthalpy Gcal/hr0.4690.7888表1-18 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00.31960.4690.78880(3)E0103出料冷凝器表1-19 热负荷表WQHeat Duty(Gcal/hr)00.9858表1-20 流股焓变计算表进出口进口出口物流编号107111Temperature C28080Pressure bar22Vapor Frac11Mole Flow kmol/hr435.46435.46Mass Flow kg/hr14867.414867.4Volume Flow cum/hr10000.76351.8Enthalpy Gcal/hr-5.15-6.14表1-21 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00.9858-5.15-6.140(4)E0104出料脱盐水器表1-22 热负荷表WQHeat Duty(Gcal/hr)01.51表1-23 流股焓变计算表进出口进口出口物流编号112113Temperature C12040Pressure bar77Vapor Frac10.68Mole Flow kmol/hr435.46435.46Mass Flow kg/hr14867.414867.4Volume Flow cum/hr2000.971112.2Enthalpy Gcal/hr-5.967-7.48表1-24 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error01.51-5.967-7.4801.4.1.4 塔的热量衡算(1)T0101 MAL吸收塔表1-25 热负荷表WQHeat Duty(Gcal/hr)00表1-26 流股焓变计算表进出口进口出口物流编号114127116117Temperature C40976466Pressure bar7877Vapor Frac1010Mole Flow kmol/hr303.854.65290.867.6Mass Flow kg/hr9391.910008134.52257.4Volume Flow cum/hr1121.31.091166.042.72Enthalpy Gcal/hr-0.722-3.64-0.522-3.83表1-27 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00-4.362-4.110(2)T0102 MAL回收塔表1-28 热负荷表WCondenserReboilerQHeat Duty(Gcal/hr)0-0.09790.230.132 表1-29 流股焓变计算表进出口进口出口物流编号120123124125Temperature C40285397Pressure bar1111Vapor Frac0100Mole Flow kmol/hr127.462.617.12117.7Mass Flow kg/hr2768.77150464.72154.05Volume Flow cum/hr3.0364.010.592.37Enthalpy Gcal/hr-8.23-0.023-0.245-7.83表1-30 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00.132-8.25-8.0750.001(3)T0103 MAL精制塔表1-31 热负荷表WCondenserReboilerQHeat Duty(Gcal/hr)0-0.1620.2440.082 表1-32 流股焓变计算表进出口进口出口Temperature C129122130132Temperature C41554465Pressure bar1111Vapor Frac0010Mole Flow kmol/hr82.183.234.2874.66Mass Flow kg/hr5503.5974.742505178.84Volume Flow cum/hr6.820.08570.07106.59Enthalpy Gcal/hr-2.88-0.2026-0.404-2.52表1-33 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00.082-3.08-2.9240.0011.4.2MMA合成与精制工段1.4.2.1反应器热量衡算(1)R0201MMA合成反应器表2-1 热负荷表WQHeat Duty(Gcal/hr)0-5.84表2-2 流股焓变计算表进出口进口出口物流编号205206Temperature C5050Pressure bar2.32.3Vapor Frac0.940.87Mole Flow kmol/hr1524.781488.92Mass Flow kg/hr48199.648199.6Volume Flow cum/hr16653.615168.4Enthalpy Gcal/hr-19.94-25.78表2-3 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0-5.84-19.94 -25.78 01.4.2.2压缩机热量衡算(1)C0201空气压缩机表2-4 热负荷表WQHeat Duty(Gcal/hr)0.93790表2-5 流股焓变计算表进出口进口出口物流编号219220Temperature C25148Pressure bar12.5Vapor Frac11Mole Flow kmol/hr1089.691089.69Mass Flow kg/hr31437.931437.9Volume Flow cum/hr2700016265.2Enthalpy Gcal/hr-0.00170.936表2-6 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.93790-0.00170.9360(2)C0202精馏段进料压缩机表2-7 热负荷表WQHeat Duty(Gcal/hr)1.150表2-8 流股焓变计算表进出口进口出口物流编号227228Temperature C80168Pressure bar12.5Vapor Frac11Mole Flow kmol/hr1194.271194.27Mass Flow kg/hr3236932369Volume Flow cum/hr34606.834606.8Enthalpy Gcal/hr-60.85-59.71表2-9 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error1.150-60.85-59.710.0011.4.2.3换热器热量衡算(1)E0201 反应出料气冷却器表2-10 热负荷表WQHeat Duty(Gcal/hr)00.9415表2-11 流股焓变计算表进出口进口出口物流编号210201Temperature C4525Pressure bar1.11.1Vapor Frac00Mole Flow kmol/hr2443.272443.27Mass Flow kg/hr56257.256257.2Volume Flow cum/hr61.5560.178Enthalpy Gcal/hr-164.55-165.492表2-12 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00.9415-164.55-165.49201.4.2.4塔热量衡算(1)T0201 MMA吸收塔表2-13 热负荷表WQHeat Duty(Gcal/hr)00表2-14 流股焓变计算表进出口进口出口物流编号201206Water203212Temperature C2550254344Pressure bar1.12.3311Vapor Frac00.876010Mole Flow kmol/hr2443.271488.921665.251155.134442.32Mass Flow kg/hr56257.248199.63000032171102286Volume Flow cum/hr60.18715168.430.1830317.7111.904Enthalpy Gcal/hr-165.4-25.78-113.6-5.71-299.18表2-15 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00-304.78-304.890.11(2)T0202 MMA萃取塔表2-16 热负荷表WQHeat Duty(Gcal/hr)00表2-17 流股焓变计算表进出口进口出口物流编号209218213217Temperature C44504442Pressure bar3.2111Vapor Frac0000Mole Flow kmol/hr1999.0474.35131928.56144.835Mass Flow kg/hr46028.65620.273897512673.9Volume Flow cum/hr50.358.4842.6716.04Enthalpy Gcal/hr-134.628-3.715-127.93-10.42表2-18 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00-138.343-138.350.07(2)T0203 正己烷回收塔表2-19 热负荷表WQHeat Duty(Gcal/hr)00表2-20 流股焓变计算表进出口进口出口物流编号223207208Temperature C4350100Pressure bar1.211Vapor Frac000Mole Flow kmol/hr144.83574.1470.70Mass Flow kg/hr12673.956027071.86Volume Flow cum/hr16.048.458.32Enthalpy Gcal/hr-10.42-3.71-6.49表2-21 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00-10.42-10.20.22(4)T0204甲醇水精制馏表2-22 热负荷表WCondenserReboilerQHeat Duty(Gcal/hr)0-1.891.72 -0.17 表2-23 流股焓变计算表进出口进口出口物流编号208221222Temperature C10011555Pressure bar10.20.2Vapor Frac000Mole Flow kmol/hr70.700.2770.43Mass Flow kg/hr7071.86237048.86Volume Flow cum/hr8.320.0257.80Enthalpy Gcal/hr-6.49-0.025-6.62表2-24 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0-0.17-6.49 -6.6450.155(5)T0205A MMA精馏塔提馏段表2-25 热负荷表WCondenserReboilerQHeat Duty(Gcal/hr)00 5.385.38表2-26 流股焓变计算表进出口进口出口物流编号213226214227Temperature C457510080Pressure bar11.111Vapor Frac0001Mole Flow kmol/hr1928.56914.481648.771194.27Mass Flow kg/hr38975233943000032369Volume Flow cum/hr42.681713.1332.7334606.8Enthalpy Gcal/hr-127.93-55.35-110.34-60.85表2-27 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error05.38-183.28 -171.196.71(6)T0205B MMA精制塔提馏段表2-28 热负荷表WCondenserReboilerQHeat Duty(Gcal/hr)0-6.74 0-6.74表2-29 流股焓变计算表进出口进口出口物流编号218225219Temperature C16588100Pressure bar2.52.52.5Vapor Frac100Mole Flow kmol/hr1194.27279.78914.48Mass Flow kg/hr32369879523394Volume Flow cum/hr17306.312.5730.96Enthalpy Gcal/hr-59.71-15.50-55.35表2-30 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0-6.74-59.71-70.854.41.4.2.5泵热量衡算(1)P0201塔底物料输出泵表2-31 热负荷表WQHeat Duty(Gcal/hr)0.000270表2-32 流股焓变计算表进出口进口出口物流编号212211Temperature C4444Pressure bar11.1Vapor Frac00Mole Flow kmol/hr4442.324442.32Mass Flow kg/hr102286102286Volume Flow cum/hr111.904111.904Enthalpy Gcal/hr-299.18-299.18表2-33 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.000270-299.18-299.18 -0.002(2)P0202 MMA萃取塔进料泵表2-34 热负荷表WQHeat Duty(Gcal/hr)0.00250表2-35 流股焓变计算表进出口进口出口物流编号202209Temperature C4444Pressure bar1.13.2Vapor Frac00Mole Flow kmol/hr1999.041999.04Mass Flow kg/hr46028.646028.6Volume Flow cum/hr50.3650.36Enthalpy Gcal/hr-134.63-134.63表2-36 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.00250-134.63-134.630.002(3)P0203 正己烷回收塔进料泵表2-37 热负荷表WQHeat Duty(Gcal/hr)0.000070表2-38 流股焓变计算表进出口进口出口物流编号217223Temperature C4242Pressure bar11.2Vapor Frac00Mole Flow kmol/hr144.835144.835Mass Flow kg/hr12673.912673.9Volume Flow cum/hr16.0416.04Enthalpy Gcal/hr-10.42-10.42表2-39 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0.000070-10.42-10.4201.4.3 MMA聚合工段1.4.4.1 反应器热量衡算(1)R0301 表3-1 热负荷表WQHeat Duty(Gcal/hr)0-31.29表3-2 流股焓变计算表进出口进口出口物流编号301309302Temperature C303085Pressure atm111Vapor Frac111Mole Flow kmol/hr71.9157302.01373.933Mass Flow kg/hr7200.017247.22937437.1Volume Flow cum/hr128.757.512580.09Enthalpy Gcal/hr-6.840-38.13表3-3 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0-31.29-6.84-38.130(2)R0302表3-4 热负荷表WQHeat Duty(Gcal/hr)00表3-5 流股焓变计算表进出口进口出口物流编号306303Temperature C8550Pressure bar1.11.1Vapor Frac00Mole Flow kmol/hr373.933373.933Mass Flow kg/hr37437.137437.1Volume Flow cum/hr580.0937.296Enthalpy Gcal/hr-38.13-38.13表3-6 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00-38.13-38.130(3)R0303表3-7 热负荷表WQHeat Duty(Gcal/hr)00表3-8 流股焓变计算表进出口进口出口物流编号306303Temperature C8550Pressure bar1.11.1Vapor Frac00Mole Flow kmol/hr373.933373.933Mass Flow kg/hr37437.137437.1Volume Flow cum/hr580.083580.083Enthalpy Gcal/hr-38.13-38.13表3-9 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error00-38.13-38.1301.4.3.2 换热器热量衡算E0301表3-10 热负荷表WQHeat Duty(Gcal/hr)0-2.83表3-11 流股焓变计算表进出口进口出口物流编号305308Temperature C21050Pressure bar0.21Vapor Frac00Mole Flow kmol/hr373.933373.933Mass Flow kg/hr37437.337437.3Volume Flow cum/hr623.44623.44Enthalpy Gcal/hr-35.88-38.71表3-12 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error0-2.83-35.88-38.7101.4.3.3 分离罐的热量衡算S0301表3-13 热负荷表WQHeat Duty(Gcal/hr)01.65表3-14 流股焓变计算表进出口进口出口物流编号307304305Temperature C120120210Pressure bar1.110.2Vapor Frac010Mole Flow kmol/hr373.934373.934373.934Mass Flow kg/hr37437.337437.337437.3Volume Flow cum/hr591.9591.9591.9Enthalpy Gcal/hr-37.540.001-35.88表3-15 热量平衡计算一览表W(Gcal/hr)Q(Gcal/hr)Hin(Gcal/hr)Hout(Gcal/hr)Error01.65-37.54-38.8901.5总结通过本次热量衡算,我们计算所有塔设备、反应器、气液分离器等能量流动,各工段设备基本符合能量守恒。 23/23

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