II異戊二烯精制工段物料衡算和能量衡算計(jì)算案例1物料衡算物料衡算即對(duì)已經(jīng)知道的組成物流組成和各組成的質(zhì)量流量來(lái)建立物料衡算式，最終求出未知物流的組成以及各組成的質(zhì)量流量。則對(duì)于本設(shè)計(jì)而言，可根據(jù)DMF二級(jí)解析塔T0305塔頂出口中異戊二烯的質(zhì)量含量大于99%的分離要求，塔釜出口中異戊二烯的質(zhì)量含量小于于3%的進(jìn)行物料衡算，所用公式如下：（1）F=D+W（2）F本次設(shè)計(jì)對(duì)工段進(jìn)行了Aspenplus模擬，由模擬結(jié)果中得出異戊二烯精制全工段的物料衡算表，見(jiàn)表3.2.1-3.2.2表3.2.1異戊二烯精制工段的進(jìn)口物料衡算一覽表進(jìn)口單位0127051306070619相態(tài)汽相液相液相溫度C48.2125432.488642525壓力bar1.6111質(zhì)量汽相分率11.16E-0800質(zhì)量液相分率0111質(zhì)量固相分率0000摩爾密度mol/cc6.31E-050.0103650.0138230.012932質(zhì)量密度gm/cc0.0042940.6565321.2730090.945226摩爾流量kmol/hr65356.907830.2體積流量l/min17175.85573.88173.6172060.257768質(zhì)量流量kg/hr4425.24122606.31276.284214.61894表3.2.2異戊二烯精制工段的出口物料衡算一覽表出口單位060306060611相態(tài)液相液相溫度C96.85269217.977920.25163壓力bar110.8質(zhì)量汽相分率00.0454460質(zhì)量液相分率10.9545541質(zhì)量固相分率000摩爾密度mol/cc0.0471950.0002360.008891質(zhì)量密度gm/cc0.8947260.0179070.628065摩爾流量kmol/hr42.108573.8151體積流量l/min14.87041268.5727283.0648質(zhì)量流量kg/hr798.296288.558510666.98續(xù)表3.2.2異戊二烯精制工段的出口物料衡算一覽表出口單位0617062606300631相態(tài)液相液相液相液相溫度℃36.9244110.932860.8836735.24197壓力bar10.50.30.3質(zhì)量汽相分率0000質(zhì)量液相分率1111質(zhì)量固相分率0000摩爾密度mol/cc0.0098610.0095060.0101610.009418質(zhì)量密度gm/cc0.6735990.6611170.6922460.664595摩爾流量kmol/hr5.2112102體積流量l/min8.78842219.2853344.46593.539476質(zhì)量流量kg/hr355.1926764.990514307.3141.1392結(jié)論：由異戊二烯精制工段進(jìn)出口的物料衡算一覽表3.2.1-3.2.2可得知，已知：qn因?yàn)閝n進(jìn)口=qn出口，所以異戊二烯精制工段進(jìn)出物料質(zhì)量守恒。2能量衡算在整個(gè)異戊二烯精制工藝流程中，隨著物料的流動(dòng)，在物料在遵守物料質(zhì)量守恒的同時(shí)，還伴隨著有能量的變化，能量衡算則是一個(gè)重要方法來(lái)提供參考依據(jù)來(lái)驗(yàn)證系統(tǒng)是否能量守恒，其中，列能量平衡方程是能量衡算的常用途徑。即：Q式中：因?yàn)楫愇於┚乒ざ螢檫B續(xù)系統(tǒng)且無(wú)外加機(jī)械能，又遵循以下的能量衡算式：Q式中：本設(shè)計(jì)是通過(guò)運(yùn)用AspenplusV8.4軟件對(duì)異戊二烯精制工段進(jìn)行模擬，可直接從軟件模擬結(jié)果中得出各設(shè)備的能量衡算一覽表，見(jiàn)表3.3.1-3.5（1）E0601熱量衡算表3.3.1熱負(fù)荷表WQHeatDuty（Mcal/hr）0-842.5897表3.3.2流股焓變計(jì)算表單位06080609相態(tài)液相溫度C216.696840壓力bar11摩爾汽相分率0.0922190摩爾焓cal/mol-111874-120300質(zhì)量焓cal/gm-1464.21-1574.49摩爾熵cal/mol-K-93.9681-114.841質(zhì)量熵cal/gm-K-1.22986-1.50305焓流量Mcal/hr-11187.4-12030摩爾流量kmol/hr100100質(zhì)量流量kg/hr7640.5627640.562表3.3.3熱量平衡計(jì)算表一覽W（Mcal/hr）Q（Mcal/hr）Hin（Mcal/hr）Hout（Mcal/hr）Error0-842.5897-11187.37290-12029.96260結(jié)論：由表3.3.1-3.3.2-3.3.3可得知，因?yàn)镠out（2）E0602換熱器熱量衡算表3.3.4熱負(fù)荷表WQHeatDuty（Mcal/hr）0-1386.07表3.3.5流股焓變計(jì)算表單位06130625相態(tài)汽相液相溫度C27.0114320壓力bar0.85摩爾汽相分率10摩爾焓cal/mol15884.079696.219質(zhì)量焓cal/gm232.8424142.1356摩爾熵cal/mol-K-57.257-77.9565質(zhì)量熵cal/gm-K-0.83932-1.14275焓流量Mcal/hr3558.0312171.953摩爾流量kmol/hr224224質(zhì)量流量kg/hr15280.8615280.86表3.3.6熱量平衡計(jì)算表一覽W（Mcal/hr）Q（Mcal/hr）Hin（Mcal/hr）Hout（Mcal/hr）Error0-1386.073558.03101282171.9530330.3895632結(jié)論：由表3.3.4-3.3.5-3.3.6可得知，因?yàn)镠out（3）E0603熱量衡算表3.3.7熱負(fù)荷表WQHeat

Duty（Mcal/hr）02739.7753表3.3.8流股焓變計(jì)算表單位060206030604相態(tài)液相液相液相溫度C138.101796.93107209.9855壓力bar111摩爾汽相分率000摩爾焓cal/mol-99319.8-65640.8-110496質(zhì)量焓cal/gm-1679.65-3464.81-1455.41摩爾熵cal/mol-K-68.6456-35.605-80.4262質(zhì)量熵cal/gm-K-1.1609-1.87939-1.05935單位060206030604焓流量Mcal/hr-14194.1-2764.32-11138摩爾流量kmol/hr142.912842.11276100.8質(zhì)量流量kg/hr8450.603797.82727652.776表3.3.9熱量平衡計(jì)算表一覽W（Mcal/hr）Q（Mcal/hr）Hin（Mcal/hr）Hout（Mcal/hr）Error02739.7753-14194.073304-11454.297552-0.193022結(jié)論：由表3.3.7-3.3.8-3.3.9可得知，因?yàn)镠out（4）E0604熱量衡算表3.3.10熱負(fù)荷表WQHeat

Duty（Mcal/hr）01386.607表3.3.11流股焓變計(jì)算表單位061206130614相態(tài)液相汽相液相溫度C27.3716527.0114338.47935壓力bar0.80.80.8摩爾汽相分率010摩爾焓cal/mol8554.37815884.07-22528.9質(zhì)量焓cal/gm125.2383232.8424-318.792摩爾熵cal/mol-K-78.1612-57.257-89.6371質(zhì)量熵cal/gm-K-1.1443-0.83932-1.2684焓流量Mcal/hr1986.4263558.031-184.998摩爾流量kmol/hr232.21162248.211613質(zhì)量流量kg/hr15861.1715280.86580.3107表3.3.12熱量平衡計(jì)算表一覽W（Mcal/hr）Q（Mcal/hr）Hin（Mcal/hr）Hout（Mcal/hr）Error01386.6071986.42597483373.0328124-0.41108結(jié)論：由表3.3.10-3.3.11-3.3.12可得知，因?yàn)镠out（5）E0605熱量衡算表3.3.13熱負(fù)荷表WQHeat

Duty（Mcal/hr）0-8640.707表3.3.14流股焓變計(jì)算表單位061606170618相態(tài)液相液相液相溫度C4036.91742151.2837壓力bar111摩爾汽相分率000摩爾焓cal/mol-30309.19942.981-51979.9質(zhì)量焓cal/gm-425.452145.5646-711.131摩爾熵cal/mol-K-92.8644-74.5324-95.9557質(zhì)量熵cal/gm-K-1.30355-1.09115-1.31276焓流量Mcal/hr-406.84651.7035-427.443摩爾流量kmol/hr13.423235.28.223227質(zhì)量流量kg/hr956.2673355.1928601.0745表3.3.15熱量平衡計(jì)算表一覽W（Mcal/hr）Q（Mcal/hr）Hin（Mcal/hr）Hout（Mcal/hr）Error0-8640.707-113012.672-104371.9650.054167結(jié)論：由表3.3.13-3.3.14-3.3.15可得知，因?yàn)镠out（6）E0606換熱器熱量衡算表3.3.16熱負(fù)荷表WQHeatDuty（Mcal/hr）0-27.717表3.3.17流股焓變計(jì)算表單位06210622相態(tài)液相液相溫度C129.847940壓力bar11摩爾汽相分率00摩爾焓cal/mol-52654.3-55944.9質(zhì)量焓cal/gm-720.358-765.375摩爾熵cal/mol-K-97.5498-106.758質(zhì)量熵cal/gm-K-1.33457-1.46054