50MW熱力發(fā)電廠汽水系統(tǒng)設(shè)計明細

學號：05410212江蘇工業(yè)學院畢業(yè)設(shè)計（2009屆）題目50MW發(fā)電廠鍋爐汽水系統(tǒng)設(shè)計學生黃西虎學院機械與能源工程學院專業(yè)班級熱能052校內(nèi)指導教師徐學慧專業(yè)技術(shù)職務高級工程師校外指導老師專業(yè)技術(shù)職務二○○九年六月頁共46頁1．緒論增大鍋爐容量和提高蒸汽參數(shù)是發(fā)電廠鍋爐的主要發(fā)展方向。近幾十年來，單臺機組容量不斷增長是一個總的趨勢。擴大單機容量可使發(fā)電容量迅速增長以適應社會經(jīng)濟發(fā)展的需要，同時可以使基建投資和設(shè)備費用降低，減少運行費用以及節(jié)約金屬材料。本次設(shè)計參閱了國內(nèi)外諸多文獻，竭力完成高參數(shù)鍋爐的設(shè)計。過程中可能有諸多不足，望各位朋友指點一二。2．鍋爐熱效率及燃料消耗量估算燃燒計算表表2-1序號項目符號單位計算公式及數(shù)據(jù)結(jié)果1理論空氣量V0m3/kg0.0889(Car+0.375Sar)+0.265Har-0.0333Oar6.8402理論氮容積VN20m3/kg0.8Nar5.4123RO2容積VRO2m3/kg1.866Car1001.2914理論干煙氣容積V0gym3/kgVN20+VRO26.7035理論水蒸汽容積V0H2Om3/kg11.1Har100+1.24Mar1000.4946飛灰份額α查表0.9煙氣特性表表2-2序號項目符號單位爐膛，屏，凝渣管高溫過熱器低溫過熱器高溫省煤器高溫空氣預熱器低溫省煤器低溫空氣預熱器1受熱面出口過量空氣系數(shù)（查表1-5）α‘’——1.221.2351.251.271.301.321.352煙道平均過量空氣系數(shù)αpj——1.221.22751.24751.261.2851.311.3353干煙氣容積V0gy+(αpj-1)VVgym3/kg8.2078.2598.3958.4818.6528.8238.9944水蒸汽容積V0H2O+0.0161(αpj-1)VVH2om3/kg0.5180.5190.5210.5220.5250.5280.5305煙氣總?cè)莘eVgy+VH2oVym3/kg8.7268.7788.9179.0049.1779.3519.5256RO2容積份額VRO2/VyrRO2——0.1470.1470.1440.1430.1400.1380.1357水蒸氣容積份額VH2o/VyrH2o——0.0590.0590.0580.0580.0570.0560.0558三原子氣體和水蒸汽rRO2+rH2or——0.2070.2060.2030.2010.1970.1940.1919容積飛灰濃度10Aarαfh/Vμvg/m319.59619.48019.17618.99118.63118.28517.95210煙氣質(zhì)量1-Aar100+1.306αmykg/kg11.70811.77511.95312.06512.28812.51212.73511質(zhì)量飛灰濃度Aμykg/kg0.01460.01450.01430.01410.01390.01360.0134煙氣焓溫表表2-3溫度?(℃)CO2N2H2O濕空氣k理論煙氣hy0(理論空氣hk0((每100170.03129.58150.52132.43995.1526905.8212200357.46259.92304.46266.362018.5711821.9021023.419300558.81392.01462.72402.693071.5662754.41052.994400771.88526.52626.16541.764155.3463705.6381083.781500994.35663.8794.85684.155268.8474679.5861113.5016001224.66804.12968.88829.746411.565675.4221142.7137001461.88947.521148.84978.327582.7926691.7091171.2328001704.881093.61334.41129.128778.7577723.1811195.9659001952.281241.551526.041282.329993.5268771.0691214.76910002203.51391.71722.91437.311227.719831.1321234391543.741925.111594.8912479.5110909.051251.79512002716.561697.162132.881753.4413745.7511993.531266.24513002976.741852.762343.641914.2515027.8713093.471282.11514003239.052008.722559.22096.216317.0514338.011289121662779.052238.917620.3315314.081303.27616003768.82324.483001.762402.8818928.4816435.71308312484.043229.322567.3420249.7817560.611321.30918004304.72643.663458.342731.8621573.2818685.921323.49119004574.62804.213690.372898.8322905.24198281331.9620004844.229653925.63065.624239.6920968.71334.45321005115.393127.534163.253233.7925586.8122119.121347.11822005386.483289.224401.983401.6426929.7823267.221342.976溫度?(℃)爐膛，屏，凝渣管h?hy高溫過熱器h?hy低溫過熱器h?hy高溫省煤器h?hy1001194.4331208.0211221.6081239.7242002419.391224.9562446.7181238.6982474.0471252.4392510.4851270.763003677.5331258.1443718.8491272.1313760.1651286.1193815.2531304.7694004970.5871293.0535026.1711307.3225081.7561321.5915155.8691340.6155006298.3561327.7696368.551342.3796438.7441356.9886532.3361376.4676007660.1531361.7977745.2841376.7347830.4161391.6727943.9241411.5887009054.9681394.8159155.3441410.069255.7191425.3049389.5541445.6380010477.861422.88810593.71438.36110709.551453.83310864.021474.46290011923.161445.30412054.731461.02312186.291476.74112361.711497.699100013390.561467.413538.031483.30113685.491499.20113882.121520.403110014879.51488.93715043.131505.10515206.771521.27415424.951542.832120016384.331504.83116564.231521.09816744.131537.365169841559.055130017908.431524.10218104.831540.60118301.231557.118563.11579.099140019471.411562.98319686.481581.65119901.551600.31920188.311625.21150020989.421518.01121219.131532.65221448.851547.29321755.131566.814160022544.331554.90622790.871571.73123037.41588.55523366.111610.987170024113.121568.78824376.531585.66224639.941602.53524991.151625.033180025684.181571.06125964.471587.9426244.761604.8226618.471627.326190027267.41583.21727564.821600.34827862.241617.47928258.81640.321200028852.81585.40829167.331602.51929481.861619.62929901.241642.444210030453.011600.2130784.81617.46631116.591634.72331558.971657.731220032048.571595.55732397.581612.77832746.59163033211.931652.961溫度?(℃)高溫空氣預熱器h?hy低溫省煤器h?hy低溫空氣預熱器h?hy1001266.8991285.0151312.192002565.142916.08122601.581316.5652656.2371344.0473003897.885932.49723952.9731351.3934035.6051379.3684005267.038951.23885341.1511388.1775452.321416.7145006672.723973.94766766.3151425.1646906.7021454.3836008114.187995.83568227.6951461.388397.9581491.2557009590.3051016.2879724.1391496.4449924.891526.93380011095.711031.47211250.171526.03611481.871556.9890012624.851047.88812800.271550.09313063.41581.53100014177.051060.06314373.671573.40614668.611605.208110015752.221077.91615970.41596.72816297.671629.066120017343.811084.48217583.681613.27917943.491645.814130018955.911099.9419217.781634.09619610.581667.094140020618.451244.53820905.211687.43721335.351724.773150022214.55976.06822520.831615.61822980.251644.9160023859.191121.62324187.91667.06924680.971700.717170025517.971124.90625869.181681.279263961715.026180027179.051125.31727552.771683.59228113.351717.352190028853.641142.07529250.21697.42429845.031731.687200030530.31140.70730949.671699.47931578.741733.7210032222.541150.4232664.931715.25233328.51749.765220033909.951148.09434375.291710.36635073.311744.809鍋爐熱平衡及燃料消耗量計算表2-4序號名稱符號單位公式結(jié)果1鍋爐輸入熱量QrkJ/kgQr≈Qar,net264002排煙溫度?py℃先估后校1253排煙焓hpykJ/kg查焓溫表用差值法求1648.2024冷空氣溫度tlk℃取用305理論冷空氣焓hlkkJ/kghlk0=(ct)k2316化學未完全燃燒損失q3%取用07機械未完全燃燒損失q4%取用58排煙處過量空氣系數(shù)αpy查表2-2即低溫空預器出口過量空氣過量系數(shù)1.359排煙損失q2%(100-q4)(hpy-αpyh4.80810散熱損失q5%取用0.511灰渣損失q6%式（2-12）7.44512鍋爐總損失∑q%q2+q3+q4+q5+q617.75313鍋爐熱效率η%100-∑82.24714保熱系數(shù)φ1-q0.99315過熱蒸汽焓hggkJ/kg查附錄B-6、B-7高溫過熱器出口參數(shù)P=9.9MPa(查表1-6),t=540℃3475.416給水溫度tgs℃給定21517給水焓hgskJ/kg查附錄B-6、B-7低溫省煤器入口參數(shù)P=11.57MPa(查表1-6),t=215℃924.0018鍋爐有效利用熱QkJ/hDgr(hgg''-h56130800019實際燃料消耗量Bkg/h100×Q/(ηQr)2585120計算燃料消耗量Bjkg/hB(1-q4/100)24558.53.爐膛熱力計算爐膛結(jié)構(gòu)數(shù)據(jù)表3-1序號名稱符號單位數(shù)據(jù)1前墻總面積Aqm2219.622側(cè)墻總面積2Am2218.483后墻總面積Am2157.744噴燃器及門孔面積Am265爐頂面積Am232.116爐膛與屏交界面積Am265.617爐墻總面積Am2693.568爐墻截面面積Am251.4799水冷壁管外徑Dmm6010水冷壁管節(jié)距Smm6411管子至墻中心距emm012水冷壁角系數(shù)X0.9813爐頂角系數(shù)X0.9814出口煙窗角系數(shù)X115爐膛容積Vm31052.616冷灰斗二等分平面到出口煙窗中心線的距離Hm19.84617冷灰斗二等分平面到爐頂?shù)木嚯xHm23.93818冷灰斗二等分平面到燃燒器中心線的距離Hm4.96219爐膛總有效輻射受熱面Am2675.1220爐膛水冷程度X0.9721爐膛有效輻射層厚度sm5.466爐膛校核熱力計算表3-2序號名稱符號單位公式結(jié)果1爐膛出口過量空氣系數(shù)α1查表1.222爐膛漏風系數(shù)?α查表0.073制粉系統(tǒng)漏風系數(shù)?α查表0.14熱風溫度trk℃先估后校3805理論熱風焓hrkkJ/kg查焓溫表3515.396理論冷風焓hlkkJ/kg查表2-42317空氣帶入爐膛熱量QkkJ/kg（α1“-?α1-?αzf）h3730.438對應每千克燃料送入爐膛的熱量Q1kJ/kgQr(1-q3+28058.7259理論燃燒溫度?0℃查焓溫表195010理論燃燒絕對溫度T0K?0222311火焰中心相對高度系數(shù)XhrH0.2512系數(shù)MMA-BX0.43513爐膛出口煙氣溫度?1℃先估后校112014爐膛出口煙氣焓hglkJ/kg查焓溫表15180.4715煙氣平均熱容量VckJ/（kg℃）（Q1-hgl"）/（?15.5216水冷壁污染系數(shù)ζsl查表3-4水冷壁灰污系數(shù)0.4517水冷壁角系數(shù)Xsl查表3-10.9818水冷壁熱有效系數(shù)ψζslX0.44119屏、爐交界面的污染系數(shù)ζycβ0.44120屏、爐交界面的角系數(shù)Xyc取用121屏、爐交界面的熱有效系數(shù)ψycζycX0.44122燃燒器及門孔熱有效系數(shù)ψr取用023平均熱有效系數(shù)ψψ0.43724爐膛有效輻射層厚度sm查表3-15.46625爐膛內(nèi)壓力pMPa0.126水蒸氣容積份額rH2o查表2-20.05927三原子氣體和水蒸氣容積總份額r查表2-20.20728三原子氣體輻射減弱系數(shù)kq1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps3.5329煙氣質(zhì)量飛灰濃度μyKg/m3查表2-20.014630灰粒平均直徑dhμm查表1331灰粒輻射減弱系數(shù)kh1/(m.MPa)5590081.0632燃料種類修正系數(shù)x1取用133燃燒方法修正系數(shù)x2取用0.134煤粉火焰輻射減弱系數(shù)k1/(m.MPa)kqr+khμy+10x1x2.9135火焰黑度ah1-e0.79636爐膛黑度a1α0.89837爐膛出口煙氣溫度?1℃T113438計算誤差??℃?1439爐膛出口煙氣焓hylkJ/kg查焓溫表15391.14340爐膛有效輻射放熱量QkJ/kgΦ（Q1-hyl12578.90941輻射受熱面平均熱負荷qSW/m2BjxQ1f/127104.62042爐膛截面熱強度qAW/m2BjxQr/(3.6XA3.4x10643爐膛容積熱強度qVW/m2BjxQr/(3.6XV0.17x106爐膛頂棚輻射受熱面吸熱量及工質(zhì)焓增的計算表3-3序號名稱符號單位公式結(jié)果1頂棚管徑dmm382節(jié)距Smm47.53排數(shù)N1584頂棚管腳系數(shù)X0.985頂棚面積Aldm232.116蒸汽流通面積Altm20.1127爐膛頂棚熱負荷分配不均勻系數(shù)ηh查表0.588爐膛頂棚總輻射吸熱量QldkJ/h3.6ηhqsAld8521815.689減溫水總流量DjwkJ/h先估后校950010爐膛頂棚蒸汽流量DldkJ/hD-Djw21050011爐膛頂棚蒸汽焓增?hkJ/kgQld/Dld40.512爐膛頂棚進口蒸汽焓hldkJ/kg查表2705.413爐膛頂棚出口蒸汽焓hldkJ/kgh2745.914爐膛頂棚出口蒸汽溫度tld℃查表3244.對流受熱面的熱力計算屏的結(jié)構(gòu)數(shù)據(jù)表4-1序號名稱符號單位數(shù)據(jù)1管子外徑dmm?2屏的片數(shù)Z123每片屏的管子排數(shù)n404屏的深度Lm2.0765屏的平均高度hm7.46一片屏的平面面積Am213.57屏的橫向節(jié)距Smm5918比值σ14.19屏的縱向節(jié)距Smm4610比值σ1.0911屏的角系數(shù)x0.9812屏的計算受熱面積Am231713屏區(qū)頂棚面積Am215.614屏區(qū)兩側(cè)水冷壁面積Am230.115屏區(qū)附加受熱面面積Am245.716煙氣進屏流通面積Am258.817煙氣出屏流通面積Am25018煙氣平均流通面積Am25419蒸汽流通面積Am20.09720煙氣有效輻射層厚度sm20.77921屏區(qū)進口煙窗面積Am265.6122屏區(qū)出口煙窗面積Am249.34屏的熱力計算表4-2序號名稱符號單位公式結(jié)果1煙氣進屏溫度?p℃?11342煙氣進屏焓hypkJ/kgh15391.1433煙氣出屏溫度?p℃先估后校9604煙氣出屏焓hypkJ/kg查焓溫表12803.65煙氣平均溫度?pj℃（?p'+10476屏區(qū)附加受熱面對流吸熱量QpfjkJ/kg先估后校1977屏的對流吸熱量QpkJ/kgφ(hyp'-hyp''2393.78爐膛與屏相互換熱系數(shù)β查表0.989爐膛出口煙窗的沿高度熱負荷分配系數(shù)ηyc查表0.810爐膛出口煙窗射入屏區(qū)的爐膛輻射熱量QpkJ/kgβηycφ（Q1-hyp96311屏間煙氣有效輻射層厚度sm查表4-10.77912屏間煙氣壓力pMPa0.113水蒸氣容積份額rH2o查表2-20.05914三原子氣體輻射減弱系數(shù)kq1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps10.715三原子氣體和水蒸氣容積總份額r查表2-20.20716灰粒的輻射減弱系數(shù)kh1/(m.MPa)5590085.317煙氣質(zhì)量飛灰濃度μyKg/m3查表2-20.014618煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ3.4619屏區(qū)煙氣黑度a1-e0.320屏進口對出口的角系數(shù)x(0.1421燃料種類修正系數(shù)ζr取用0.522屏出口煙窗面積AP查表5023爐膛及屏間煙氣向屏后受熱面的輻射熱量QpkJ/kgQ34424屏區(qū)吸收的爐膛輻射熱QpqkJ/kgQp'f61925屏區(qū)附加受熱面吸收的輻射熱量QpfjkJ/kgQ7826屏區(qū)水冷壁吸收的輻射熱量QkJ/kgQ51.3727屏區(qū)頂棚吸收的輻射熱量QkJ/kgQ26.6228屏吸收的輻射熱量QkJ/kgQ56729屏吸收的總熱量QkJ/kgQpd180730第一級減溫水噴水量Djw1Kg/h取用4.8x10331第二級減溫水噴水量DKg/h取用4.7x10332屏中蒸汽流量DpKg/hD-D215.3x10333蒸汽進屏溫度t℃先估后校39034蒸汽進屏焓hkJ/kg查表3054.335蒸汽出屏焓hkJ/kghp'+BJQ3290.436蒸汽出屏溫度t℃查表47037屏內(nèi)蒸汽平均溫度t℃（tp'+43038平均傳熱溫差?t℃?pj-586.539屏內(nèi)蒸汽平均比體積vm3/Kg查表0.0275140屏內(nèi)蒸汽流速ωqm/sD1741管壁對蒸汽的放熱系數(shù)α2W/(m2.℃)查表271342煙氣流速ωm/sBjVy5.143煙氣側(cè)對流放熱系數(shù)αW/(m2.℃)查表27.344灰污系數(shù)?(m2.℃)/W查表0.006845管壁灰污層厚度t℃tpj+（ε+1α74946輻射放熱系數(shù)αW/(m2.℃)查表9647利用系數(shù)ζ查表0.8648煙氣側(cè)放熱系數(shù)αW/(m2.℃)查表11649對流傳熱系數(shù)kW/(m2.℃)α5250屏的對流傳熱量QkJ/kg3.6123751計算誤差%[Q0.2252屏區(qū)水冷壁水溫t℃查表31853平均傳熱溫差?℃?698.554屏區(qū)水冷壁對流吸熱量QkJ/kg3.6k?14055屏區(qū)頂棚進口蒸汽溫度t℃查表3-332556屏區(qū)頂棚進口蒸汽焓hkJ/kg查表3-32747.757屏區(qū)頂棚蒸汽焓增?kJ/kg先估后校1358屏區(qū)頂棚出口蒸汽焓hkJ/kghpld'2760.759屏區(qū)頂棚出口蒸汽溫度t℃查表32760屏區(qū)頂棚平均氣溫t℃（tpld'+32661平均傳熱溫差?℃?pj-690.562屏區(qū)頂棚對流吸熱量QkJ/kg3.6k?71.763屏區(qū)頂棚總吸熱量QkJ/kgQpldd99.764屏區(qū)頂棚蒸汽流量DKg/hDld21050065屏區(qū)頂棚焓增?hkJ/kgQplddBj13.366計算誤差檢查%[?hpld(估)-?hpld-2.367屏區(qū)附加受熱面對流吸熱量QkJ/kgQ211.768計算誤差%[Qpfjd(估)-Q-7.4669屏區(qū)受熱面總對流吸熱量QkJ/kgQpfjd+1437凝渣管結(jié)構(gòu)表4-3序號名稱符號單位結(jié)果1管子尺寸Dmm?133X102管子排列方式及根數(shù)N根103管子節(jié)距Smm7004受熱面積Hm226.85煙道流通截面積Aym240.86煙道容積Vm227.27煙道表面積Am2114.18煙氣輻射層厚度sm0.8659煙氣進凝渣管溫度?℃96010煙氣進凝渣管焓hkJ/kg1107111煙氣出凝渣管溫度?℃94812煙氣出凝渣管焓hkJ/kg1092013凝渣管對流吸熱量QkJ/kg13014凝渣管角系數(shù)x0.27515來自爐膛及屏的輻射熱QkJ/kg30316凝渣管吸收的輻射熱QkJ/kg83.517凝渣管總吸收熱量QkJ/kg202.3318通過凝渣管的輻射熱QkJ/kg219.5高溫對流過熱器結(jié)構(gòu)數(shù)據(jù)表4-4序號名稱符號單位數(shù)據(jù)1管子尺寸dmm?2冷段橫向節(jié)距及布置n403熱段橫向節(jié)距及布置n394橫向節(jié)距smm955橫向節(jié)距比σ2.2626縱向節(jié)距smm877縱向節(jié)距比σ2.078管子縱向排數(shù)n89冷段蒸汽流通面積Am20.064210熱段蒸汽流通面積Am20.062811平均流通截面積A0.063412煙氣流通面積Aym223.313冷段受熱面積Am223714熱段受熱面積Am223115頂棚受熱面積Am210.0616管束前煙室深度lm20.717管束深度lm20.6118有效輻射層厚度sm20.188高溫過熱器的熱力計算表4-5序號名稱符號單位公式結(jié)果1進口煙氣溫度?℃查表4-3第11項9482進口煙氣焓hkJ/kg查表4-3第12項110713進冷段蒸汽溫度t℃查表4-24704進冷鍛蒸汽焓hkJ/kg查表4-23290.45總輻射吸收熱量QkJ/kgQ219.56冷段輻射吸熱量QkJ/kgQ108.87熱段輻射吸熱量QkJ/kgQ106.18頂棚輻射吸熱量QkJ/kgQ4-29出熱段蒸汽溫度t℃建議54054010出熱段蒸汽焓hkJ/kg查表347511出冷段蒸汽溫度t℃先估后校51512出冷段蒸汽焓hkJ/kg查表341013第二次減溫水量DkJ/kg取用4.7x10314減溫水焓hkJ/kg給水焓1459.515進熱段蒸汽焓hkJ/kgh336816進熱段蒸汽溫度t℃查表49917冷段吸熱量QkJ/kgD-915.418熱段吸熱量QkJ/kgDh834.219高溫過熱器吸熱量QkJ/kgQ1749.620高溫過熱器對流吸熱量QkJ/kgQ1530.121頂棚對流吸熱量QkJ/kg先估后校19.922高溫過熱器出口煙焓hkJ/kgh942423高過出口煙溫?℃查焓溫表81424煙氣平均溫度?℃（88125煙氣流速ωm/sB10.826煙氣側(cè)放熱系數(shù)αW/(m2.℃)查表7027冷段蒸汽平均溫度t℃（tggl492.528冷段蒸汽平均比體積vm3/kg查表0.03129冷段蒸汽平均流速ωm/sD-0.007830冷段蒸汽放熱系數(shù)αW/(m2.℃)查表352831熱段蒸汽平均溫度t℃（tggr519.532熱段蒸汽平均比體積vm3/kg查表0.0327733熱段蒸汽平均流速ωm/sDv8.634熱段蒸汽放熱系數(shù)αW/(m2.℃)查表352835高過煙氣有效輻射層厚度sm查表4-10.18836煙氣壓力pMPa0.137水蒸氣容積份額r查表2-20.05938三原子氣體和水蒸氣容積總份額r查表2-20.22939三原子氣體輻射減弱系數(shù)k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps2540灰粒輻射減弱系數(shù)k1/(m.MPa)559009241煙氣質(zhì)量飛灰濃度μkg/m3查表2-20.014542煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ7.7543煙氣黑度a1-e0.13644冷段管壁灰污層溫度t℃tgglpj+（ε+1α638.645熱段管壁灰污層溫度t℃tggrpj+（ε+1α638.646冷段輻射放熱系數(shù)αW/(m2.℃)查表2747熱段輻射放熱系數(shù)αW/(m2.℃)查表2748修正后冷段放熱系數(shù)αW/(m2.℃)α3749修正后熱段放熱系數(shù)αW/(m2.℃)α3750冷段傳熱系數(shù)KW/(m2.℃)ψ67.551熱段傳熱系數(shù)KW/(m2.℃)ψ67.552冷段平均溫差?t℃?388.553熱段平均溫差?t℃?361.554冷段對流吸熱量QkJ/kg3.6805.755計算誤差[(Q1.2756熱段對流吸熱量QkJ/kg3.6724.457計算誤差[(Q0.428低溫過熱器的結(jié)構(gòu)數(shù)據(jù)表4-6序號名稱符號單位數(shù)據(jù)1布置順列，逆流，雙管圈2管子尺寸dmm?3橫向排數(shù)n794縱向排數(shù)n205橫向節(jié)距smm956橫向節(jié)距比σ2.57縱向節(jié)距smm80.78縱向節(jié)距比σm22.129煙氣流通面積Am218.710蒸汽流通面積Am20.11211低溫過熱器受熱面積Am276812低溫過熱器前氣室深度Lm0.913低溫過熱器前管束深度Lm1.53314煙氣有效輻射層厚度sm0.198低溫過熱器的熱力計算表4-7序號名稱符號單位公式結(jié)果1進口煙氣溫度?℃高溫過熱器出口煙溫8142進口煙氣焓hkJ/kg高溫過熱器出口煙焓94243進口蒸汽溫度t℃高溫過熱器頂棚出口蒸汽溫度3284進口蒸汽焓hkJ/kg高溫過熱器頂棚出口蒸汽焓2764.75出口蒸汽溫度t℃先估后校4026出口蒸汽焓hkJ/kg查表3090.77低溫過熱器對流吸熱量QkJ/kgD-24388出口煙氣焓hkJ/kgh6979.59出口煙氣溫度t℃查焓溫表61010煙氣平均溫度?℃（71211煙氣流速ωm/sB11.712煙氣側(cè)對流放熱系數(shù)αdgW/(m2.℃)查表8113蒸汽平均溫度t℃（tdg36514蒸汽平均比體積vm3/kg查表0.0216615蒸汽流速ωm/sD-11.3516蒸汽側(cè)放熱系數(shù)αW/(m2.℃)查表310017低過煙氣有效輻射層厚度sm查表4-60.19818煙氣壓力pMPa0.119水蒸氣容積份額r查表2-20.05820三原子氣體和水蒸氣容積總份額r查表2-20.20321三原子氣體輻射減弱系數(shù)k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps2722灰粒輻射減弱系數(shù)k1/(m.MPa)5590010223煙氣質(zhì)量飛灰濃度μkg/m3查表2-20.014324煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ8.3325煙氣黑度a1-e0.15226管壁灰污層溫度t℃tpj+（ε+1α480.527煙氣側(cè)輻射放熱系數(shù)αW/(m2.℃)查表2228修正后輻射放熱系數(shù)αW/(m2.℃)α3129煙氣側(cè)放熱系數(shù)αW/(m2.℃)ζ(αdgf1+11230傳熱系數(shù)KW/(m2.℃)ψ70.331平均溫差?t℃?34732低溫過熱器對流吸熱量QkJ/kg3.6239833計算誤差允許誤差±2%1.64高溫省煤器的結(jié)構(gòu)數(shù)據(jù)表4-8序號名稱符號單位數(shù)據(jù)1布置錯列，逆流，雙面進水2管子尺寸dmm?3橫向節(jié)距smm864縱向節(jié)距smm605橫向節(jié)距比σ2.686縱向節(jié)距比σ1.877橫向排數(shù)n1098縱向排數(shù)n249高溫省煤器受熱面積Am2101110煙氣流通面積Am223.211水流通面積Am20.09912煙氣有效輻射層厚度sm0.15613管束前氣室深度Lm3.214管束深度Lm21.32高溫省煤器的熱力計算表4-9序號名稱符號單位公式結(jié)果1進口煙氣溫度?℃ 低溫過熱器出口煙溫6102進口煙氣焓hkJ/kg高溫過熱器出口煙焓6979.53出口煙氣溫度?℃先估后校4154出口煙氣焓hkJ/kg查焓溫表46971-4通用，5-18低溫省煤器未計算時采用5高溫省煤器吸熱量QkJ/kgφ（hyss'22986減溫水量DKg/hD9.5X1037高溫省煤器水流量DKg/hD-D220X1038爐膛有效輻射放熱量QkJ/kg查表3-212578.9099屏區(qū)受熱面總對流吸熱量QkJ/kg查表4-2143710凝渣管對流吸熱量QkJ/kg查表4-313011高溫過熱器區(qū)域總對流吸熱量QkJ/kg查表4-41530.112低溫過熱器對流吸熱量QkJ/kg查表4-7239813省煤器后工質(zhì)總吸熱量ΣQkJ/kgQ1f+Qpqd+Q1807314鍋爐出口蒸汽焓hkJ/kg查表4-4第10項347515高溫省煤器出口水焓hkJ/kgD1118.616高溫省煤器出口水溫t℃查表25717高溫省煤器進口水焓hkJ/kgh824.818高溫省煤器進口水溫t℃查表19319-22計算完低溫省煤器后，校核計算時采用19高溫省煤器進口水溫t℃即低溫省煤器出口水溫22320高溫省煤器進口水焓hkJ/kg即低溫省煤器出口水焓960.621高溫省煤器出口水焓hkJ/kgh28022高溫省煤器出口水溫t℃查表123323-41通用23平均水溫t℃（tss''+22524煙氣平均溫度?℃（?ss''+512.525高省煙氣有效輻射層厚度sm查表4-80.15626煙氣壓力pMPa0.127水蒸氣容積份額r查表2-20.08728三原子氣體和水蒸氣容積總份額r查表2-20.22229三原子氣體輻射減弱系數(shù)k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps3430灰粒輻射減弱系數(shù)k1/(m.MPa)55900118.331煙氣質(zhì)量飛灰濃度μkg/m3查表2-20.014132煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ10.1733煙氣黑度a1-e0.14634管壁灰污層溫度t℃t28535煙氣側(cè)輻射放熱系數(shù)αW/(m2.℃)查表9.336修正后輻射放熱系數(shù)αW/(m2.℃)α1337煙氣流速ωm/sB7.638煙氣側(cè)對流放熱系數(shù)αW/(m2.℃)查表7439污染系數(shù)ε查表0.00465640煙氣側(cè)放熱系數(shù)αW/(m2.℃)ζ(αd+8741傳熱系數(shù)KW/(m2.℃)α6242平均傳熱溫差?t℃?287.543高溫省煤器對流吸熱量QkJ/kg3.6230644計算誤差允許誤差±2%-0.348高溫空氣預熱器的結(jié)構(gòu)尺寸表4-10序號名稱符號單位數(shù)據(jù)1布置錯列，交叉流動，雙面進風2管子尺寸dmm?3橫向節(jié)距smm704橫向節(jié)距比σ1.755縱向節(jié)距smm426縱向節(jié)距比σ1.057縱向排數(shù)n448受熱面積Am230009煙氣流通面積Am210.410空氣流通面積Am215.611行程數(shù)n112煙氣有效輻射層厚度sm0.0333高溫空氣預熱器熱力計算表4-11序號名稱符號單位公式結(jié)果1進口煙氣溫度?℃高溫省煤器出口煙氣溫度4152進口煙氣焓hkJ/kg高溫省煤器出口煙氣焓46971-2通用，3-12低溫空氣預熱器未計算時采用3出口空氣溫度t℃查表3-23204出口理論空氣焓hkJ/kg查焓溫表46975進口空氣溫度t℃先估后校2246進口理論空氣焓hkJ/kg查焓溫表17427空氣側(cè)出口處過量空氣系數(shù)βα1''-?1.098高溫空氣預熱器對流吸熱量QkJ/kg(βsk''+?α857.49空氣平均溫度t℃（tsk''+27210漏風的理論空氣焓hkJ/kg查焓溫表212611出口煙氣焓hkJ/kgh3941.612出口煙氣溫度?℃查焓溫表34013-19計算完低溫空氣預熱器后，校核計算時采用13進口空氣溫度t℃低溫空氣預熱器出口空氣溫度21014進口理論空氣焓hkJ/kg低溫空氣預熱器出口空氣焓163215假設(shè)出口煙氣溫度?℃先估后校341.516出口煙氣焓hkJ/kg查焓溫表3960.617高溫空氣預熱器對流吸熱量QkJ/kgφ（hysk'97918出口空氣焓hkJ/kgQskd1β251019出口空氣溫度t℃查焓溫表32020-42通用20煙氣平均溫度?℃算術(shù)平均值377.521煙氣流速ωm/sB14.322煙氣側(cè)對流放熱系數(shù)αW/(m2.℃)查表43.223高空煙氣有效輻射層厚度sm查表4-100.033324煙氣壓力pMPa0.125水蒸氣容積份額r查表2-20.08526三原子氣體和水蒸氣容積總份額r查表2-20.19727三原子氣體輻射減弱系數(shù)k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps80.228灰粒輻射減弱系數(shù)k1/(m.MPa)55900134.729煙氣質(zhì)量飛灰濃度μkg/m3查表2-20.013930煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ20.6331煙氣黑度a1-e0.066432管壁灰污層溫度t℃(t324.7533煙氣側(cè)輻射放熱系數(shù)αW/(m2.℃)查表3.2434煙氣側(cè)放熱系數(shù)αW/(m2.℃)ζ(αskf46.4435空氣流速ωm/s(β6.736空氣側(cè)放熱系數(shù)αW/(m2.℃)查表7037傳熱系數(shù)KW/(m2.℃)ζα12338參數(shù)Pτ0.39339參數(shù)Rτ1.2840轉(zhuǎn)換系數(shù)ψ查表0.9241逆流溫差?t℃?105.542平均傳熱溫差?t℃ψ9743高溫空氣預熱器對流吸熱量QkJ/kg3.6856.5544計算誤差%允許誤差±2%0.099低溫省煤器結(jié)構(gòu)數(shù)據(jù)表4-12序號名稱符號單位數(shù)據(jù)1布置錯列，逆流，雙面進水2管子尺寸dmm?3橫向節(jié)距smm904橫向節(jié)距比σ2.85縱向節(jié)距smm486縱向節(jié)距比σ1.37橫向排數(shù)n628縱向排數(shù)n329受熱面積Am276610煙氣流通面積Am214.511水流通面積Am20.11212煙氣有效輻射層厚度Sm0.12713管束前及管束間氣室深度Lm1.414管束深度Lm21.44低溫省煤器熱力計算表4-13序號名稱符號單位公式結(jié)果1進口煙氣溫度?℃高溫空氣預熱器出口煙氣溫度3402進口煙氣焓hkJ/kg高溫空氣預熱器出口煙氣焓3491.63出口煙氣溫度?℃先估后校2594出口煙氣焓hkJ/kg查焓溫表30125低溫省煤器流吸熱量QkJ/kgφ（hyxs'9066進口給水溫度t℃已知2157進口給水焓hkJ/kg查表790.38出口水焓hkJ/kgQxsd1B9069出口水溫度t℃查表21110煙氣流速ωm/sB9.411煙氣側(cè)對流放熱系數(shù)αW/(m2.℃)查表94.412低省煙氣有效輻射層厚度sm查表4-120.12713煙氣壓力pMPa0.114水蒸氣容積份額r查表2-20.08315三原子氣體和水蒸氣容積總份額r查表2-20.21216三原子氣體輻射減弱系數(shù)k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps4217灰粒輻射減弱系數(shù)k1/(m.MPa)5590014718煙氣質(zhì)量飛灰濃度μkg/m3查表2-20.0205119煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ1220煙氣黑度a1-e0.14121管壁灰污層厚度t℃[（txs''+22322煙氣側(cè)輻射放熱系數(shù)αW/(m2.℃)查表4.5923修正后輻射放熱系數(shù)αW/(m2.℃)α6.2324煙氣側(cè)放熱系數(shù)αW/(m2.℃)ζ(αxs'f100.6325污染系數(shù)εC0.001126平均傳熱溫差?t℃?101.527傳熱系數(shù)KW/(m2.℃)α90.628低溫省煤器對流吸熱量QkJ/kg3.6901.4829計算誤差允許誤差±2%0.49930高溫省煤器進口水溫度t℃查表4-922331計算誤差?℃txs''-9低溫空氣預熱器結(jié)構(gòu)數(shù)據(jù)表4-14序號名稱符號單位數(shù)據(jù)1布置錯列，雙面進風2管子尺寸dmm?3橫向節(jié)距smm764橫向節(jié)距比σ1.95縱向節(jié)距smm446縱向節(jié)距比σ1.17橫向排數(shù)n2168管子根數(shù)N86969管箱高度Hm8.710管箱有效高度hm8.5611空氣道平均高度Lm1.1712受熱面積Am2900013煙氣流通面積Am29.3514空氣流通面積Am212.315行程數(shù)n516煙氣有效輻射層厚度sm0.06低溫空氣預熱器熱力計算表4-15序號名稱符號單位公式結(jié)果1進口空氣溫度t℃取用302進口理論空氣焓hkJ/kg查焓溫表2313高溫空氣預熱器漏風系數(shù)?查表0.034高溫空氣預熱器空氣側(cè)出口過量空氣系數(shù)β查表4-111.305低溫空氣預熱器空氣側(cè)出口過量空氣系數(shù)ββ1.146出口空氣溫度t℃先估后校2107出口理論空氣焓hkJ/kg查焓溫表16328低溫空氣預熱器對流吸熱量QkJ/kg(βxk''+?α16329進口煙氣溫度?℃低溫省煤器出口煙氣溫度25910進口煙氣焓hkJ/kg低溫省煤器出口煙氣焓301211空氣平均溫度t℃（tk,xk''+12012漏風的理論空氣焓hkJ/kg查焓溫表,按空氣平均溫度92813出口煙氣焓hkJ/kgh1418.214出口煙氣溫度?℃查焓溫表12015煙氣平均溫度?℃(?xk‘189.516煙氣流速ωm/sB1217煙氣側(cè)對流放熱系數(shù)αW/(m2.℃)查表45.618低空煙氣有效輻射層厚度Sm查表4-140.0619煙氣壓力pMPa0.120水蒸氣容積份額r查表2-20.05521三原子氣體和水蒸氣容積總份額r查表2-20.19122三原子氣體輻射減弱系數(shù)k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps4223灰粒輻射減弱系數(shù)k1/(m.MPa)5590014724煙氣質(zhì)量飛灰濃度μkg/m3查表2-20.0205125煙氣輻射減弱系數(shù)k1/(m.MPa)kqr+khμ1226煙氣黑度a1-e0.14127管壁灰污層溫度t℃(t19328煙氣側(cè)輻射放熱系數(shù)αW/(m2.℃)查表4.5929煙氣側(cè)放熱系數(shù)αW/(m2.℃)ζ(αxkf45.630空氣流速ωm/s(β6.331空氣側(cè)放熱系數(shù)αW/(m2.℃)查表73.4632傳熱系數(shù)KW/(m2.℃)ζα11733轉(zhuǎn)換系數(shù)ψ取用134逆流平均溫差?t℃?83.3535傳熱溫差?t℃ψ83.3536低溫空氣預熱器對流吸熱量QkJ/kg3.6163237計算誤差允許誤差±2%038低溫空氣預熱器區(qū)域?qū)α魑鼰崃縌kJ/kgQ16325.鍋爐誤差檢查尾部受熱面計算誤差檢查序號名稱符號單位公式結(jié)果1低溫省煤器出口水溫t℃查表4-13低溫省煤器熱力計算2132高溫省煤器進口水溫t℃查表4-9高溫省煤器熱力計算2233計算誤差?℃允許計算誤差±10℃-104低溫空氣預熱器出口空氣溫度t℃查表4-15低溫空氣預熱器熱力計算2015高溫空氣預熱器進口空氣溫度t℃查表4-11高溫空氣預熱器熱力計算2106計算誤差?℃允許計算誤差±10℃-9整體熱力計算誤差檢查序號名稱符號單位公式結(jié)果1假設(shè)進入爐膛熱風溫度t℃查表3-2爐膛熱力計算3802高溫空氣預熱器出口熱