鍋爐效率反平衡計算實例

1、GB 10184-88 鍋爐熱效率計算書#1機組#2機組序號項目符號單位公式或數(shù)據(jù)來源結(jié)果結(jié)果1已知條件主汽流量Dt/hDCS (MAIN STEAM FLOWFQ02901):2810.342810.34大氣壓力P actPa?100980100980設(shè)計基準溫度（計算效率用）btoC設(shè)計值（?）30.030.0相對濕度f%?8080環(huán)境溫度（計算空氣絕對濕度用）toCDCS (AVG: PAF A IN TEMITE1401;PAF B IN TEMFTE1402; FDF A INLET TEMPE1501;FDF B INLET TEMFTE1508 )26.8426.84空預(yù)器進口煙

2、氣溫度qky'CDCS (AVG: FDF A OTL TEMTE1504; FDF B OTL TEMFTE1511)360360排煙溫度qpyCDCS (AVG： SEC AIR A IEMF1E1505SEC AIR A IEMF2 七1505 SEC_AIR_A_TEMF3E1505;SEC_AIR_B_TEMFT-E1505;SEC AIR B TEMF2E1505;SEC AIR B TEMFTE1505)129.98129.98飛灰可燃物含量Cfh%DCS (AVG: CIA A; CIA B)2.552.55爐渣可燃物含量Clz%?0.640.64飛灰占燃煤總灰量的質(zhì)量

3、百分率afh%?9090爐渣占燃煤總灰量的質(zhì)量百分率aiz%?1010鍋爐排煙中的氧含量O2%DCS(AVG:GAS_O2_A-AT1902;AVG:GAS_O2_B-AT19ORHEATERLEAK(?)2.732.73鍋爐排煙中的二原子氣體含量RO2%取樣分析或跟據(jù)ASME FTC19.10標準計算（?）1010鍋爐排煙中的氮含量n2%N2=100-O 2-RO 287.2787.272煤質(zhì)資料（收到基重量百分率）水分Mar%Ma nual In put (分析水份Wad%)18.1011.80碳Car%Manual In put (C ad%)56.2654.20氫Har%Ma nual

4、 In put (H ad%)3.793.47氧Oar%Ma nual In put (O ad%)12.117.00氮Nar%Ma nual In put (N ad%)0.821.10硫Sar%Manual In put (S ad%)0.170.40灰Aar%Manual In put (灰份Aad%)18.2218.22定壓低位發(fā)熱量Qp,( net)arkJ/kgMan ual In put (低位發(fā)熱量 Qnet.ad(J/g)21130214603計算步驟3.1排煙熱損失q2%q2=Q2/Qr*1004.584.363.1.1排煙帶走的熱量Q2kJ/kggy H2OQ2=Q2 +

5、Q2968.72935.023.1.2干煙氣帶走的熱里Q2gykJ/kggyq2=VgyCp.gy(q py-t0)842.80826.79干煙氣(to至qpy)平均定壓比熱Cp.gy3kJ/m .KCp.gy =Cp.CO2 RO 2/100+C p.O2 O2/100+C p.N2N2/1001.34101.3410CO2平均定壓比熱Cp.CO2kJ/m3.K-3-72-103Cp.cO2 =1.59981+1.07732*10qpy7.70675*10 qpy +3.43519*qpy1.72761.727602平均定壓比熱Cp.O2kJ/m3.K-5-t2-103Cp.O2 =1.30

6、586+8.22434*10 qpy+4.00158*10 qpy -3.92592* qpy1.32241.3224N2平均定壓比熱Cp.N2kJ/m3.K-6-7 2-103Cp.N2 =1.29465+7.31852*10qpy+1.79523*10 qpy -6.38890*qpy1.29721.2972干煙氣體積Vgym3/kgVgy=(Vgy0)C + (apy-1)(Vgk0)C6.28636.1669實際燃碳產(chǎn)生理論干煙氣量(Vgy°)Cm3/kgo cro c(Vgy ) =1.866(Car+0.375S ar)/100+0.79(V gk ) +0.8Nar/1

7、005.45335.3474實際燃碳量Carr%rCar =C ar-AarC/10055.8253.76灰渣含碳量與燃煤含灰量比率C%C=afh*Cfh/(100-C fh)+aiz*Ciz/(100-C Z2.422.42實際燃碳所需理論干空氣量(Vgk0)Cm3/kgo cr(Vgk ) =0.089(C ar +0.375S ar)+0.265H ar-0.0333O ar5.57475.4844排煙過?？諝庀禂?shù)apy-apy=21/(21-O 2)1.151.153.1.3煙氣中含水蒸汽的顯熱H2OQ2kJ/kgH2OQ2=VH2OCp.H2O (qpy-t0)125.92108.2

8、3水蒸汽(to至qpy )平均定壓比熱Cp.H2O3kJ/m .K由附錄C中查取(?)1.51521.5152煙氣中含水蒸汽體積VH2O3.3m /mo cVh2o=1.24(9H ar+Mar)/100+1.293 a py(Vgk ) dk0.83120.7144空氣的絕對濕度dkkg/kg仟空氣)dk=0.622f(Pb)o/100/(P act-f (Pb)o/100)0.01790.0179在to溫度下的水蒸汽飽和壓力(Pb)oPa2-23-4 4(Pb)o=611.7927+42.7809t 0+1.6883t 0 +1.2079*10 t。+6.1637*10 t03530353

9、03.1.4按tob修正排煙溫度(計算中未用該值)bqpyCbbqpy =t0 (qky'-qpy)+qky'(qpyt0)/( qky'-t0)132.16132.163.2化學未完全燃燒熱損失q3%q3=Vgy126.36CO/Q 產(chǎn) 10000鍋爐排煙中的一氧化碳含量CO%?003.3固體未完全燃燒熱損失q4%szq4=337.27A arC/Q r+q40.820.70中速磨煤機排出石子煤熱損失szq4%szszq4 =BszQdw /(BQr)*1000.120.01中速磨煤機排出石子煤量Bszkg/h?5000500中速磨煤機排出石子煤低位發(fā)熱量QdWSZk

10、J/kg取樣分析(?)20002000鍋爐燃料消耗量Bkg/h?13900004000003.4散熱損失q5%e f eq5=q 5 D /D0.290.28額疋蒸發(fā)量下的冃攵熱損失eq5%e -f e -0.38q5 =5.82(D )0.280.29鍋爐額定蒸發(fā)量Det/h設(shè)計值(?)294628003.5灰渣物理熱損失q6%q6=Aar/(100Q r)* aiz(800-t 0)Cp.lz/(100-C lz)+afh(qpy-t0)Cp.fh /(100-Cfh)0.0010.001爐渣在800 C時的比熱Cp.lzkJ/kg.K由附錄C中查取(?)0.96300.9630飛灰在qpy時的比熱Cp.fhkJ/kg.K由附錄 C 中查取進行插值計算 Cp.fh =0.7955+(