50MW热力发电厂汽水系统设计明细

学号：05410212江苏工业学院毕业设计（2009届）题目50MW发电厂锅炉汽水系统设计学生黄西虎学院机械与能源工程学院专业班级热能052校内指导教师徐学慧专业技术职务高级工程师校外指导老师专业技术职务二○○九年六月页共46页1．绪论增大锅炉容量和提高蒸汽参数是发电厂锅炉的主要发展方向。近几十年来，单台机组容量不断增长是一个总的趋势。扩大单机容量可使发电容量迅速增长以适应社会经济发展的需要，同时可以使基建投资和设备费用降低，减少运行费用以及节约金属材料。本次设计参阅了国内外诸多文献，竭力完成高参数锅炉的设计。过程中可能有诸多不足，望各位朋友指点一二。2．锅炉热效率及燃料消耗量估算燃烧计算表表2-1序号项目符号单位计算公式及数据结果1理论空气量V0m3/kg0.0889(Car+0.375Sar)+0.265Har-0.0333Oar6.8402理论氮容积VN20m3/kg0.8Nar5.4123RO2容积VRO2m3/kg1.866Car1001.2914理论干烟气容积V0gym3/kgVN20+VRO26.7035理论水蒸汽容积V0H2Om3/kg11.1Har100+1.24Mar1000.4946飞灰份额α查表0.9烟气特性表表2-2序号项目符号单位炉膛，屏，凝渣管高温过热器低温过热器高温省煤器高温空气预热器低温省煤器低温空气预热器1受热面出口过量空气系数（查表1-5）α‘’——1.221.2351.251.271.301.321.352烟道平均过量空气系数αpj——1.221.22751.24751.261.2851.311.3353干烟气容积V0gy+(αpj-1)VVgym3/kg8.2078.2598.3958.4818.6528.8238.9944水蒸汽容积V0H2O+0.0161(αpj-1)VVH2om3/kg0.5180.5190.5210.5220.5250.5280.5305烟气总容积Vgy+VH2oVym3/kg8.7268.7788.9179.0049.1779.3519.5256RO2容积份额VRO2/VyrRO2——0.1470.1470.1440.1430.1400.1380.1357水蒸气容积份额VH2o/VyrH2o——0.0590.0590.0580.0580.0570.0560.0558三原子气体和水蒸汽rRO2+rH2or——0.2070.2060.2030.2010.1970.1940.1919容积飞灰浓度10Aarαfh/Vμvg/m319.59619.48019.17618.99118.63118.28517.95210烟气质量1-Aar100+1.306αmykg/kg11.70811.77511.95312.06512.28812.51212.73511质量飞灰浓度Aμykg/kg0.01460.01450.01430.01410.01390.01360.0134烟气焓温表表2-3温度ϑ(℃)CO2N2H2O湿空气k理论烟气hy0(理论空气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温度ϑ(℃)炉膛，屏，凝渣管h∆hy高温过热器h∆hy低温过热器h∆hy高温省煤器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温度ϑ(℃)高温空气预热器h∆hy低温省煤器h∆hy低温空气预热器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锅炉热平衡及燃料消耗量计算表2-4序号名称符号单位公式结果1锅炉输入热量QrkJ/kgQr≈Qar,net264002排烟温度ϑpy℃先估后校1253排烟焓hpykJ/kg查焓温表用差值法求1648.2024冷空气温度tlk℃取用305理论冷空气焓hlkkJ/kghlk0=(ct)k2316化学未完全燃烧损失q3%取用07机械未完全燃烧损失q4%取用58排烟处过量空气系数αpy查表2-2即低温空预器出口过量空气过量系数1.359排烟损失q2%(100-q4)(hpy-αpyh4.80810散热损失q5%取用0.511灰渣损失q6%式（2-12）7.44512锅炉总损失∑q%q2+q3+q4+q5+q617.75313锅炉热效率η%100-∑82.24714保热系数φ1-q0.99315过热蒸汽焓hggkJ/kg查附录B-6、B-7高温过热器出口参数P=9.9MPa(查表1-6),t=540℃3475.416给水温度tgs℃给定21517给水焓hgskJ/kg查附录B-6、B-7低温省煤器入口参数P=11.57MPa(查表1-6),t=215℃924.0018锅炉有效利用热QkJ/hDgr(hgg''-h56130800019实际燃料消耗量Bkg/h100×Q/(ηQr)2585120计算燃料消耗量Bjkg/hB(1-q4/100)24558.53.炉膛热力计算炉膛结构数据表3-1序号名称符号单位数据1前墙总面积Aqm2219.622侧墙总面积2Am2218.483后墙总面积Am2157.744喷燃器及门孔面积Am265炉顶面积Am232.116炉膛与屏交界面积Am265.617炉墙总面积Am2693.568炉墙截面面积Am251.4799水冷壁管外径Dmm6010水冷壁管节距Smm6411管子至墙中心距emm012水冷壁角系数X0.9813炉顶角系数X0.9814出口烟窗角系数X115炉膛容积Vm31052.616冷灰斗二等分平面到出口烟窗中心线的距离Hm19.84617冷灰斗二等分平面到炉顶的距离Hm23.93818冷灰斗二等分平面到燃烧器中心线的距离Hm4.96219炉膛总有效辐射受热面Am2675.1220炉膛水冷程度X0.9721炉膛有效辐射层厚度sm5.466炉膛校核热力计算表3-2序号名称符号单位公式结果1炉膛出口过量空气系数α1查表1.222炉膛漏风系数∆α查表0.073制粉系统漏风系数∆α查表0.14热风温度trk℃先估后校3805理论热风焓hrkkJ/kg查焓温表3515.396理论冷风焓hlkkJ/kg查表2-42317空气带入炉膛热量QkkJ/kg（α1“-∆α1-∆αzf）h3730.438对应每千克燃料送入炉膛的热量Q1kJ/kgQr(1-q3+28058.7259理论燃烧温度ϑ0℃查焓温表195010理论燃烧绝对温度T0Kϑ0222311火焰中心相对高度系数XhrH0.2512系数MMA-BX0.43513炉膛出口烟气温度ϑ1℃先估后校112014炉膛出口烟气焓hglkJ/kg查焓温表15180.4715烟气平均热容量VckJ/（kg℃）（Q1-hgl"）/（ϑ15.5216水冷壁污染系数ζsl查表3-4水冷壁灰污系数0.4517水冷壁角系数Xsl查表3-10.9818水冷壁热有效系数ψζslX0.44119屏、炉交界面的污染系数ζycβ0.44120屏、炉交界面的角系数Xyc取用121屏、炉交界面的热有效系数ψycζycX0.44122燃烧器及门孔热有效系数ψr取用023平均热有效系数ψψ0.43724炉膛有效辐射层厚度sm查表3-15.46625炉膛内压力pMPa0.126水蒸气容积份额rH2o查表2-20.05927三原子气体和水蒸气容积总份额r查表2-20.20728三原子气体辐射减弱系数kq1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps3.5329烟气质量飞灰浓度μyKg/m3查表2-20.014630灰粒平均直径dhμm查表1331灰粒辐射减弱系数kh1/(m.MPa)5590081.0632燃料种类修正系数x1取用133燃烧方法修正系数x2取用0.134煤粉火焰辐射减弱系数k1/(m.MPa)kqr+khμy+10x1x2.9135火焰黑度ah1-e0.79636炉膛黑度a1α0.89837炉膛出口烟气温度ϑ1℃T113438计算误差∆ϑ℃ϑ1439炉膛出口烟气焓hylkJ/kg查焓温表15391.14340炉膛有效辐射放热量QkJ/kgΦ（Q1-hyl12578.90941辐射受热面平均热负荷qSW/m2BjxQ1f/127104.62042炉膛截面热强度qAW/m2BjxQr/(3.6XA3.4x10643炉膛容积热强度qVW/m2BjxQr/(3.6XV0.17x106炉膛顶棚辐射受热面吸热量及工质焓增的计算表3-3序号名称符号单位公式结果1顶棚管径dmm382节距Smm47.53排数N1584顶棚管脚系数X0.985顶棚面积Aldm232.116蒸汽流通面积Altm20.1127炉膛顶棚热负荷分配不均匀系数ηh查表0.588炉膛顶棚总辐射吸热量QldkJ/h3.6ηhqsAld8521815.689减温水总流量DjwkJ/h先估后校950010炉膛顶棚蒸汽流量DldkJ/hD-Djw21050011炉膛顶棚蒸汽焓增∆hkJ/kgQld/Dld40.512炉膛顶棚进口蒸汽焓hldkJ/kg查表2705.413炉膛顶棚出口蒸汽焓hldkJ/kgh2745.914炉膛顶棚出口蒸汽温度tld℃查表3244.对流受热面的热力计算屏的结构数据表4-1序号名称符号单位数据1管子外径dmm∅2屏的片数Z123每片屏的管子排数n404屏的深度Lm2.0765屏的平均高度hm7.46一片屏的平面面积Am213.57屏的横向节距Smm5918比值σ14.19屏的纵向节距Smm4610比值σ1.0911屏的角系数x0.9812屏的计算受热面积Am231713屏区顶棚面积Am215.614屏区两侧水冷壁面积Am230.115屏区附加受热面面积Am245.716烟气进屏流通面积Am258.817烟气出屏流通面积Am25018烟气平均流通面积Am25419蒸汽流通面积Am20.09720烟气有效辐射层厚度sm20.77921屏区进口烟窗面积Am265.6122屏区出口烟窗面积Am249.34屏的热力计算表4-2序号名称符号单位公式结果1烟气进屏温度ϑp℃ϑ11342烟气进屏焓hypkJ/kgh15391.1433烟气出屏温度ϑp℃先估后校9604烟气出屏焓hypkJ/kg查焓温表12803.65烟气平均温度ϑpj℃（ϑp'+10476屏区附加受热面对流吸热量QpfjkJ/kg先估后校1977屏的对流吸热量QpkJ/kgφ(hyp'-hyp''2393.78炉膛与屏相互换热系数β查表0.989炉膛出口烟窗的沿高度热负荷分配系数ηyc查表0.810炉膛出口烟窗射入屏区的炉膛辐射热量QpkJ/kgβηycφ（Q1-hyp96311屏间烟气有效辐射层厚度sm查表4-10.77912屏间烟气压力pMPa0.113水蒸气容积份额rH2o查表2-20.05914三原子气体辐射减弱系数kq1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps10.715三原子气体和水蒸气容积总份额r查表2-20.20716灰粒的辐射减弱系数kh1/(m.MPa)5590085.317烟气质量飞灰浓度μyKg/m3查表2-20.014618烟气辐射减弱系数k1/(m.MPa)kqr+khμ3.4619屏区烟气黑度a1-e0.320屏进口对出口的角系数x(0.1421燃料种类修正系数ζr取用0.522屏出口烟窗面积AP查表5023炉膛及屏间烟气向屏后受热面的辐射热量QpkJ/kgQ34424屏区吸收的炉膛辐射热QpqkJ/kgQp'f61925屏区附加受热面吸收的辐射热量QpfjkJ/kgQ7826屏区水冷壁吸收的辐射热量QkJ/kgQ51.3727屏区顶棚吸收的辐射热量QkJ/kgQ26.6228屏吸收的辐射热量QkJ/kgQ56729屏吸收的总热量QkJ/kgQpd180730第一级减温水喷水量Djw1Kg/h取用4.8x10331第二级减温水喷水量DKg/h取用4.7x10332屏中蒸汽流量DpKg/hD-D215.3x10333蒸汽进屏温度t℃先估后校39034蒸汽进屏焓hkJ/kg查表3054.335蒸汽出屏焓hkJ/kghp'+BJQ3290.436蒸汽出屏温度t℃查表47037屏内蒸汽平均温度t℃（tp'+43038平均传热温差∆t℃ϑpj-586.539屏内蒸汽平均比体积vm3/Kg查表0.0275140屏内蒸汽流速ωqm/sD1741管壁对蒸汽的放热系数α2W/(m2.℃)查表271342烟气流速ωm/sBjVy5.143烟气侧对流放热系数αW/(m2.℃)查表27.344灰污系数ϵ(m2.℃)/W查表0.006845管壁灰污层厚度t℃tpj+（ε+1α74946辐射放热系数αW/(m2.℃)查表9647利用系数ζ查表0.8648烟气侧放热系数αW/(m2.℃)查表11649对流传热系数kW/(m2.℃)α5250屏的对流传热量QkJ/kg3.6123751计算误差%[Q0.2252屏区水冷壁水温t℃查表31853平均传热温差∆℃ϑ698.554屏区水冷壁对流吸热量QkJ/kg3.6k∆14055屏区顶棚进口蒸汽温度t℃查表3-332556屏区顶棚进口蒸汽焓hkJ/kg查表3-32747.757屏区顶棚蒸汽焓增∆kJ/kg先估后校1358屏区顶棚出口蒸汽焓hkJ/kghpld'2760.759屏区顶棚出口蒸汽温度t℃查表32760屏区顶棚平均气温t℃（tpld'+32661平均传热温差∆℃ϑpj-690.562屏区顶棚对流吸热量QkJ/kg3.6k∆71.763屏区顶棚总吸热量QkJ/kgQpldd99.764屏区顶棚蒸汽流量DKg/hDld21050065屏区顶棚焓增∆hkJ/kgQplddBj13.366计算误差检查%[∆hpld(估)-∆hpld-2.367屏区附加受热面对流吸热量QkJ/kgQ211.768计算误差%[Qpfjd(估)-Q-7.4669屏区受热面总对流吸热量QkJ/kgQpfjd+1437凝渣管结构表4-3序号名称符号单位结果1管子尺寸Dmm∅133X102管子排列方式及根数N根103管子节距Smm7004受热面积Hm226.85烟道流通截面积Aym240.86烟道容积Vm227.27烟道表面积Am2114.18烟气辐射层厚度sm0.8659烟气进凝渣管温度ϑ℃96010烟气进凝渣管焓hkJ/kg1107111烟气出凝渣管温度ϑ℃94812烟气出凝渣管焓hkJ/kg1092013凝渣管对流吸热量QkJ/kg13014凝渣管角系数x0.27515来自炉膛及屏的辐射热QkJ/kg30316凝渣管吸收的辐射热QkJ/kg83.517凝渣管总吸收热量QkJ/kg202.3318通过凝渣管的辐射热QkJ/kg219.5高温对流过热器结构数据表4-4序号名称符号单位数据1管子尺寸dmm∅2冷段横向节距及布置n403热段横向节距及布置n394横向节距smm955横向节距比σ2.2626纵向节距smm877纵向节距比σ2.078管子纵向排数n89冷段蒸汽流通面积Am20.064210热段蒸汽流通面积Am20.062811平均流通截面积A0.063412烟气流通面积Aym223.313冷段受热面积Am223714热段受热面积Am223115顶棚受热面积Am210.0616管束前烟室深度lm20.717管束深度lm20.6118有效辐射层厚度sm20.188高温过热器的热力计算表4-5序号名称符号单位公式结果1进口烟气温度ϑ℃查表4-3第11项9482进口烟气焓hkJ/kg查表4-3第12项110713进冷段蒸汽温度t℃查表4-24704进冷锻蒸汽焓hkJ/kg查表4-23290.45总辐射吸收热量QkJ/kgQ219.56冷段辐射吸热量QkJ/kgQ108.87热段辐射吸热量QkJ/kgQ106.18顶棚辐射吸热量QkJ/kgQ4-29出热段蒸汽温度t℃建议54054010出热段蒸汽焓hkJ/kg查表347511出冷段蒸汽温度t℃先估后校51512出冷段蒸汽焓hkJ/kg查表341013第二次减温水量DkJ/kg取用4.7x10314减温水焓hkJ/kg给水焓1459.515进热段蒸汽焓hkJ/kgh336816进热段蒸汽温度t℃查表49917冷段吸热量QkJ/kgD-915.418热段吸热量QkJ/kgDh834.219高温过热器吸热量QkJ/kgQ1749.620高温过热器对流吸热量QkJ/kgQ1530.121顶棚对流吸热量QkJ/kg先估后校19.922高温过热器出口烟焓hkJ/kgh942423高过出口烟温ϑ℃查焓温表81424烟气平均温度ϑ℃（88125烟气流速ωm/sB10.826烟气侧放热系数αW/(m2.℃)查表7027冷段蒸汽平均温度t℃（tggl492.528冷段蒸汽平均比体积vm3/kg查表0.03129冷段蒸汽平均流速ωm/sD-0.007830冷段蒸汽放热系数αW/(m2.℃)查表352831热段蒸汽平均温度t℃（tggr519.532热段蒸汽平均比体积vm3/kg查表0.0327733热段蒸汽平均流速ωm/sDv8.634热段蒸汽放热系数αW/(m2.℃)查表352835高过烟气有效辐射层厚度sm查表4-10.18836烟气压力pMPa0.137水蒸气容积份额r查表2-20.05938三原子气体和水蒸气容积总份额r查表2-20.22939三原子气体辐射减弱系数k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps2540灰粒辐射减弱系数k1/(m.MPa)559009241烟气质量飞灰浓度μkg/m3查表2-20.014542烟气辐射减弱系数k1/(m.MPa)kqr+khμ7.7543烟气黑度a1-e0.13644冷段管壁灰污层温度t℃tgglpj+（ε+1α638.645热段管壁灰污层温度t℃tggrpj+（ε+1α638.646冷段辐射放热系数αW/(m2.℃)查表2747热段辐射放热系数αW/(m2.℃)查表2748修正后冷段放热系数αW/(m2.℃)α3749修正后热段放热系数αW/(m2.℃)α3750冷段传热系数KW/(m2.℃)ψ67.551热段传热系数KW/(m2.℃)ψ67.552冷段平均温差∆t℃ϑ388.553热段平均温差∆t℃ϑ361.554冷段对流吸热量QkJ/kg3.6805.755计算误差[(Q1.2756热段对流吸热量QkJ/kg3.6724.457计算误差[(Q0.428低温过热器的结构数据表4-6序号名称符号单位数据1布置顺列，逆流，双管圈2管子尺寸dmm∅3横向排数n794纵向排数n205横向节距smm956横向节距比σ2.57纵向节距smm80.78纵向节距比σm22.129烟气流通面积Am218.710蒸汽流通面积Am20.11211低温过热器受热面积Am276812低温过热器前气室深度Lm0.913低温过热器前管束深度Lm1.53314烟气有效辐射层厚度sm0.198低温过热器的热力计算表4-7序号名称符号单位公式结果1进口烟气温度ϑ℃高温过热器出口烟温8142进口烟气焓hkJ/kg高温过热器出口烟焓94243进口蒸汽温度t℃高温过热器顶棚出口蒸汽温度3284进口蒸汽焓hkJ/kg高温过热器顶棚出口蒸汽焓2764.75出口蒸汽温度t℃先估后校4026出口蒸汽焓hkJ/kg查表3090.77低温过热器对流吸热量QkJ/kgD-24388出口烟气焓hkJ/kgh6979.59出口烟气温度t℃查焓温表61010烟气平均温度ϑ℃（71211烟气流速ωm/sB11.712烟气侧对流放热系数αdgW/(m2.℃)查表8113蒸汽平均温度t℃（tdg36514蒸汽平均比体积vm3/kg查表0.0216615蒸汽流速ωm/sD-11.3516蒸汽侧放热系数αW/(m2.℃)查表310017低过烟气有效辐射层厚度sm查表4-60.19818烟气压力pMPa0.119水蒸气容积份额r查表2-20.05820三原子气体和水蒸气容积总份额r查表2-20.20321三原子气体辐射减弱系数k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps2722灰粒辐射减弱系数k1/(m.MPa)5590010223烟气质量飞灰浓度μkg/m3查表2-20.014324烟气辐射减弱系数k1/(m.MPa)kqr+khμ8.3325烟气黑度a1-e0.15226管壁灰污层温度t℃tpj+（ε+1α480.527烟气侧辐射放热系数αW/(m2.℃)查表2228修正后辐射放热系数αW/(m2.℃)α3129烟气侧放热系数αW/(m2.℃)ζ(αdgf1+11230传热系数KW/(m2.℃)ψ70.331平均温差∆t℃ϑ34732低温过热器对流吸热量QkJ/kg3.6239833计算误差允许误差±2%1.64高温省煤器的结构数据表4-8序号名称符号单位数据1布置错列，逆流，双面进水2管子尺寸dmm∅3横向节距smm864纵向节距smm605横向节距比σ2.686纵向节距比σ1.877横向排数n1098纵向排数n249高温省煤器受热面积Am2101110烟气流通面积Am223.211水流通面积Am20.09912烟气有效辐射层厚度sm0.15613管束前气室深度Lm3.214管束深度Lm21.32高温省煤器的热力计算表4-9序号名称符号单位公式结果1进口烟气温度ϑ℃ 低温过热器出口烟温6102进口烟气焓hkJ/kg高温过热器出口烟焓6979.53出口烟气温度ϑ℃先估后校4154出口烟气焓hkJ/kg查焓温表46971-4通用，5-18低温省煤器未计算时采用5高温省煤器吸热量QkJ/kgφ（hyss'22986减温水量DKg/hD9.5X1037高温省煤器水流量DKg/hD-D220X1038炉膛有效辐射放热量QkJ/kg查表3-212578.9099屏区受热面总对流吸热量QkJ/kg查表4-2143710凝渣管对流吸热量QkJ/kg查表4-313011高温过热器区域总对流吸热量QkJ/kg查表4-41530.112低温过热器对流吸热量QkJ/kg查表4-7239813省煤器后工质总吸热量ΣQkJ/kgQ1f+Qpqd+Q1807314锅炉出口蒸汽焓hkJ/kg查表4-4第10项347515高温省煤器出口水焓hkJ/kgD1118.616高温省煤器出口水温t℃查表25717高温省煤器进口水焓hkJ/kgh824.818高温省煤器进口水温t℃查表19319-22计算完低温省煤器后，校核计算时采用19高温省煤器进口水温t℃即低温省煤器出口水温22320高温省煤器进口水焓hkJ/kg即低温省煤器出口水焓960.621高温省煤器出口水焓hkJ/kgh28022高温省煤器出口水温t℃查表123323-41通用23平均水温t℃（tss''+22524烟气平均温度ϑ℃（ϑss''+512.525高省烟气有效辐射层厚度sm查表4-80.15626烟气压力pMPa0.127水蒸气容积份额r查表2-20.08728三原子气体和水蒸气容积总份额r查表2-20.22229三原子气体辐射减弱系数k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps3430灰粒辐射减弱系数k1/(m.MPa)55900118.331烟气质量飞灰浓度μkg/m3查表2-20.014132烟气辐射减弱系数k1/(m.MPa)kqr+khμ10.1733烟气黑度a1-e0.14634管壁灰污层温度t℃t28535烟气侧辐射放热系数αW/(m2.℃)查表9.336修正后辐射放热系数αW/(m2.℃)α1337烟气流速ωm/sB7.638烟气侧对流放热系数αW/(m2.℃)查表7439污染系数ε查表0.00465640烟气侧放热系数αW/(m2.℃)ζ(αd+8741传热系数KW/(m2.℃)α6242平均传热温差∆t℃ϑ287.543高温省煤器对流吸热量QkJ/kg3.6230644计算误差允许误差±2%-0.348高温空气预热器的结构尺寸表4-10序号名称符号单位数据1布置错列，交叉流动，双面进风2管子尺寸dmm∅3横向节距smm704横向节距比σ1.755纵向节距smm426纵向节距比σ1.057纵向排数n448受热面积Am230009烟气流通面积Am210.410空气流通面积Am215.611行程数n112烟气有效辐射层厚度sm0.0333高温空气预热器热力计算表4-11序号名称符号单位公式结果1进口烟气温度ϑ℃高温省煤器出口烟气温度4152进口烟气焓hkJ/kg高温省煤器出口烟气焓46971-2通用，3-12低温空气预热器未计算时采用3出口空气温度t℃查表3-23204出口理论空气焓hkJ/kg查焓温表46975进口空气温度t℃先估后校2246进口理论空气焓hkJ/kg查焓温表17427空气侧出口处过量空气系数βα1''-∆1.098高温空气预热器对流吸热量QkJ/kg(βsk''+∆α857.49空气平均温度t℃（tsk''+27210漏风的理论空气焓hkJ/kg查焓温表212611出口烟气焓hkJ/kgh3941.612出口烟气温度ϑ℃查焓温表34013-19计算完低温空气预热器后，校核计算时采用13进口空气温度t℃低温空气预热器出口空气温度21014进口理论空气焓hkJ/kg低温空气预热器出口空气焓163215假设出口烟气温度ϑ℃先估后校341.516出口烟气焓hkJ/kg查焓温表3960.617高温空气预热器对流吸热量QkJ/kgφ（hysk'97918出口空气焓hkJ/kgQskd1β251019出口空气温度t℃查焓温表32020-42通用20烟气平均温度ϑ℃算术平均值377.521烟气流速ωm/sB14.322烟气侧对流放热系数αW/(m2.℃)查表43.223高空烟气有效辐射层厚度sm查表4-100.033324烟气压力pMPa0.125水蒸气容积份额r查表2-20.08526三原子气体和水蒸气容积总份额r查表2-20.19727三原子气体辐射减弱系数k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps80.228灰粒辐射减弱系数k1/(m.MPa)55900134.729烟气质量飞灰浓度μkg/m3查表2-20.013930烟气辐射减弱系数k1/(m.MPa)kqr+khμ20.6331烟气黑度a1-e0.066432管壁灰污层温度t℃(t324.7533烟气侧辐射放热系数αW/(m2.℃)查表3.2434烟气侧放热系数αW/(m2.℃)ζ(αskf46.4435空气流速ωm/s(β6.736空气侧放热系数αW/(m2.℃)查表7037传热系数KW/(m2.℃)ζα12338参数Pτ0.39339参数Rτ1.2840转换系数ψ查表0.9241逆流温差∆t℃ϑ105.542平均传热温差∆t℃ψ9743高温空气预热器对流吸热量QkJ/kg3.6856.5544计算误差%允许误差±2%0.099低温省煤器结构数据表4-12序号名称符号单位数据1布置错列，逆流，双面进水2管子尺寸dmm∅3横向节距smm904横向节距比σ2.85纵向节距smm486纵向节距比σ1.37横向排数n628纵向排数n329受热面积Am276610烟气流通面积Am214.511水流通面积Am20.11212烟气有效辐射层厚度Sm0.12713管束前及管束间气室深度Lm1.414管束深度Lm21.44低温省煤器热力计算表4-13序号名称符号单位公式结果1进口烟气温度ϑ℃高温空气预热器出口烟气温度3402进口烟气焓hkJ/kg高温空气预热器出口烟气焓3491.63出口烟气温度ϑ℃先估后校2594出口烟气焓hkJ/kg查焓温表30125低温省煤器流吸热量QkJ/kgφ（hyxs'9066进口给水温度t℃已知2157进口给水焓hkJ/kg查表790.38出口水焓hkJ/kgQxsd1B9069出口水温度t℃查表21110烟气流速ωm/sB9.411烟气侧对流放热系数αW/(m2.℃)查表94.412低省烟气有效辐射层厚度sm查表4-120.12713烟气压力pMPa0.114水蒸气容积份额r查表2-20.08315三原子气体和水蒸气容积总份额r查表2-20.21216三原子气体辐射减弱系数k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps4217灰粒辐射减弱系数k1/(m.MPa)5590014718烟气质量飞灰浓度μkg/m3查表2-20.0205119烟气辐射减弱系数k1/(m.MPa)kqr+khμ1220烟气黑度a1-e0.14121管壁灰污层厚度t℃[（txs''+22322烟气侧辐射放热系数αW/(m2.℃)查表4.5923修正后辐射放热系数αW/(m2.℃)α6.2324烟气侧放热系数αW/(m2.℃)ζ(αxs'f100.6325污染系数εC0.001126平均传热温差∆t℃ϑ101.527传热系数KW/(m2.℃)α90.628低温省煤器对流吸热量QkJ/kg3.6901.4829计算误差允许误差±2%0.49930高温省煤器进口水温度t℃查表4-922331计算误差∆℃txs''-9低温空气预热器结构数据表4-14序号名称符号单位数据1布置错列，双面进风2管子尺寸dmm∅3横向节距smm764横向节距比σ1.95纵向节距smm446纵向节距比σ1.17横向排数n2168管子根数N86969管箱高度Hm8.710管箱有效高度hm8.5611空气道平均高度Lm1.1712受热面积Am2900013烟气流通面积Am29.3514空气流通面积Am212.315行程数n516烟气有效辐射层厚度sm0.06低温空气预热器热力计算表4-15序号名称符号单位公式结果1进口空气温度t℃取用302进口理论空气焓hkJ/kg查焓温表2313高温空气预热器漏风系数∆查表0.034高温空气预热器空气侧出口过量空气系数β查表4-111.305低温空气预热器空气侧出口过量空气系数ββ1.146出口空气温度t℃先估后校2107出口理论空气焓hkJ/kg查焓温表16328低温空气预热器对流吸热量QkJ/kg(βxk''+∆α16329进口烟气温度ϑ℃低温省煤器出口烟气温度25910进口烟气焓hkJ/kg低温省煤器出口烟气焓301211空气平均温度t℃（tk,xk''+12012漏风的理论空气焓hkJ/kg查焓温表,按空气平均温度92813出口烟气焓hkJ/kgh1418.214出口烟气温度ϑ℃查焓温表12015烟气平均温度ϑ℃(ϑxk‘189.516烟气流速ωm/sB1217烟气侧对流放热系数αW/(m2.℃)查表45.618低空烟气有效辐射层厚度Sm查表4-140.0619烟气压力pMPa0.120水蒸气容积份额r查表2-20.05521三原子气体和水蒸气容积总份额r查表2-20.19122三原子气体辐射减弱系数k1/(m.MPa)10.2x(0.78+1.6rH2o10.2rps4223灰粒辐射减弱系数k1/(m.MPa)5590014724烟气质量飞灰浓度μkg/m3查表2-20.0205125烟气辐射减弱系数k1/(m.MPa)kqr+khμ1226烟气黑度a1-e0.14127管壁灰污层温度t℃(t19328烟气侧辐射放热系数αW/(m2.℃)查表4.5929烟气侧放热系数αW/(m2.℃)ζ(αxkf45.630空气流速ωm/s(β6.331空气侧放热系数αW/(m2.℃)查表73.4632传热系数KW/(m2.℃)ζα11733转换系数ψ取用134逆流平均温差∆t℃ϑ83.3535传热温差∆t℃ψ83.3536低温空气预热器对流吸热量QkJ/kg3.6163237计算误差允许误差±2%038低温空气预热器区域对流吸热量QkJ/kgQ16325.锅炉误差检查尾部受热面计算误差检查序号名称符号单位公式结果1低温省煤器出口水温t℃查表4-13低温省煤器热力计算2132高温省煤器进口水温t℃查表4-9高温省煤器热力计算2233计算误差∆℃允许计算误差±10℃-104低温空气预热器出口空气温度t℃查表4-15低温空气预热器热力计算2015高温空气预热器进口空气温度t℃查表4-11高温空气预热器热力计算2106计算误差∆℃允许计算误差±10℃-9整体热力计算误差检查序号名称符号单位公式结果1假设进入炉膛热风温度t℃查表3-2炉膛热力计算3802高温空气预热器出口热