热量衡算草稿[总结]

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1、2.热量衡算(DE0902Tl123°Ct270°Ctl50°CT297.7°C物料：进123°C出97.7°C冷水：进50°C出70°C换热量：1.022X10e7kj/hQ=qmcCpc(t2~tl)冷却水Cpc=4.180kJ/(kg°C)qmc=Q/Cpc(t2~t1)=1.222X10e5kj/hQ=KSAtm取K值为500W/(m2oC)Atm=50.303°C得S=112.872m2(2)E0903物料：进97.7°C出40.0°C冷水：进32°C出50°CTc(K)PcCPVAPACPVAPBCPVAPCC

2、PVAPD物料T=(97.7+40)/2+273.15=342KC0CL2455566.7093.250E-2-3.281E51.211E-8CCL4556.4459.7254.893E-2-5.421E-52.112E-8C6II4CL2679.2540.5-3.4161.315E-l1.078E-43.414E-8TDI930.46102.38.65580.1589-0.8473E-40.412E-7Tr=T/TcPr=P/PcAH=T(7.9Tr-7.82-7.lllgPr)/(l.07-Tr)TrPr△Hcal/k

3、gCpcal/(kg.K)ODCB0.5034.874E-35.167E4206.218CCL40.6154.386E-37.525E4136.123C0CL20.7523.525E-31.830E5146.170Cp=A+BT+CT2+DT3由此可得Qi=CpiqmiAt+AHiQ=EQi计算得Q=2.84e4kj/hQ=qmcCpc(t2-tl)冷却水Cpc二4.174kJ/(kg°C)qmc二Q/Cpc(t2-tl)=378kg/hQ^KSAtm取K值为450W/(m2°C)△tm二22.235°C得S二0.788m

4、2(3)E0901屮压蒸汽170°C133.4°C物料：进133.4°C出159°C中压蒸汽：进170°CCPVAPACPVAPBCPVAPCCPVAPDwC0CL26.7093.250E-2-3.281E-51.211E-80.204CCL49.7254.893E-2-5.421E-52.112E-80.194C6H4CL2-3.4161.315E-l-1.078E-43.414E-80.272TD1&65580.1589-0.8473E-40.412E-70.1036gCpgJ/(mol.K)ODCB132.177CC

5、L489.195C0CL261.651TD1237.982由Cp=A+BT+CT2+DT3可得由公式(Cpl-Cpm)/R=0.634(0.5+2.2w)/(l-Tr)+3.67+11.4(1-屮压蒸汽195°C153.2°C再沸器供热量:4.42X10e6kj/h热损：5%170°C屮压蒸汽汽化热r二2052.7kJ/kg由再沸器供热量:4.42X10e6kj/h得Q=4.42X10e6/(l-0.05)=4.653X10e6kj/hQ沪0.233X10e6kj/h由Q二qr得q=2.267X10e3kg/hQ^KSAt

6、m取K值为650W/(m2oC)得S=88.701m2(4)E0904ODCB：进124.6°C；l

7、50°C冷却水：进32°C出40°C物料T二(124.6+50)/2+273.15=360.45KTr)4得1Cp1J/(mol.K)ODCB185.520CCL4141.058C0CL2113.705TDT288.14Qi二CpiqmiQ二刀Qi计算得Q二4.409e6kj/hQ=qmcCp1(t2~tl)冷却水Cpc=4.174kJ/(kg°C)qmc=Q/Cpc(t2~tl)=1.320e5kg/hQ=KSAtm取K

8、值为500W/(m2°C)△tm二43.03°C得S=56.924m2(5)E1001物料：进153.2°C出170°C中压蒸汽：进195°C再沸器供热量:2.500X10e6kj/h热损:5%170°C中压蒸汽汽化热r=2207.025kJ/kg由再沸器供热量:4.42X10e6kj/h得Q=2.500X10e6/(l-0.05)=2.632X10e6kj/hQ沪1.32X10e5kj/h由Q=qr得q二1.192X10e3kg/hQ=KSAtm取K值为650W/(m2oC)△tin二32.684°C得S二34.414m

9、2(6)E1002+E1003物料：进78.6°C出40°C冷水：进25°C出35°Cqmc=Q/Cpc(t2~tl)=3.441X10e4kj/h移热量：2.18X10e6kj/hQ=qmcCpc(t2~tl)冷却水Cpc二4.174kJ/(kg°C)qmc=Q/Cpc(t2-tl)=5.223X10