锅炉设计计算

一、设计内容（已知条件）项目数值单位项目数值额定蒸发量D111.1kg/s安徽淮南烟煤收到基成分过热蒸汽出口压力Pgr13.7MpaCar60.82过热蒸汽出口温度tgr555℃Har4.01再热蒸汽进口温度tzr1335℃Oar7.65再热蒸汽出口温度tzr2555℃Nar1.11再热蒸汽进口压力Pzr12.57MpaSar0.67再热蒸汽出口压力Pzr22.37MpaMar6再热蒸汽量Dzr91.67kg/sAar19.74给水温度tgs240℃Vdaf38给水压力pgs17.29Mpa灰熔点DT1500℃排烟温度tpy158℃燃料收到基低位发热量Qar24300预热空气温度tyk285℃冷空气温度tlk20℃汽包压力15.34MPa排污率PW2%二、辅助计算1、烟道空气系数及受热面漏风系数入口出口炉膛1.150.05后屏过热器1.151.150.00高温过热器1.151.170.02高温再热器至转向室1.171.190.02低温过热器及再热器1.191.210.02省煤器1.211.230.02空预器1.231.320.091.32制粉系统漏风系数daf0.04[1]p49空气预热器出口过量空气系数betaa-dal-daf1.062、燃烧产物容积和焓的计算过量空气系数漏风系数[1]p48燃煤电站锅炉热力计算（1）、燃烧产物体积的计算项目公式结果理论空气量（标况）V00.0889*(Car+0.375*Sar)+0.265*Har-0.0333*Oar6.237RO2体积VRO21.866*(Car+0.375*Sar)/1001.140H2O的理论体积VH2O0.111*Har+0.0124*Mar+0.0161*V00.620N2的理论体积VN20.79*V0+0.8*Nar/1004.936（2）受热面烟道中的烟气平均特性计算数值名称公式炉膛后屏高温过热器高温再热器至转向室低温过热器省煤器出口过量系数a1.1501.1701.1901.2101.230平均过量空气系数0.5（a1+a2）1.1501.1601.1801.2001.220过剩空气量（a-1)*V00.9360.9981.1231.2471.372H2O的体积VH2O+0.0161*(a-1)V00.6350.6360.6380.6400.642烟气总体积VH2O+0.0161*(a-1)*V0+VN2+VRO2+(a-1)V07.6467.7097.8337.9588.083RO2体积份额VRO2/Vy0.1490.1480.1450.1430.141H2O体积份额VH2O/Vy0.0810.0800.0790.0780.077三原子气体体积份额rRO2+rH2O0.2300.2280.2250.2210.218烟气质量1-Aar/100+1.306aV010.17010.25210.41510.57710.740烟灰浓度kg/kg0.9Aar/(100Gy)0.0170.0170.0170.0170.017（3）空气、烟气的焓温表θ/℃VRO2=1.50（m3/kg）VN2=4.936（m3/kg）VH2O=0.620（m3/kg）Aar=19.740afh=0.9（m3/kg）(cθ)CO2(cθ)CO2*VRO2(cθ)N2(cθ)N2*VN2(cθ)H2O(cθ)H2O*VH2O(cθ)fh(cθ)fh*Aar*afh/100123456789100169192.591130641.715193.618114.39200357406.8332601283304188.516930.02300559637.031392193546328726446.9400772879.7635272601626388.136063.965009961135.036643278794492.245981.5560012221392.588043969967599.556099.4970014611664.9494646701147711.1663117.880017041941.86109353951335827.6767136.390019512223.34124361361524944.8874155.3100022022509.381394688117251069984174.8110024572799.9715457626192611941096194.7120027173096.2616958367213113211206214.3130029763391.4218509132234414531360241.6140032403692.2720099917255815861571279.1150035043993.12216410682277917231758312.3160037674292.83232311467300118601830325.1170040354598.24248212252322720012066367180043034903.65264213041345821442184388190045715209.06280513846368822862385423.7200048435519.03296414631392624342512446.3210051155829312715436416125802640469220053876138.97329016240439927272760490.3（3）空气、烟气的焓温表(续表)θ/℃V0=6.237（m3/kg）Iy(kJ/kg)(cθ)kIk=(cθ)k*v01.1501.1501.1701.1901.2101.230100132823.302105110511068108411011117.32002661659.082128212821612194222722603004032513.573236323632863337338734374005423380.534376437644444512457946475006844266.25545554556305715580158866008305176.836737673768416944704871517009796106.1679627962808482068328845080011307047.9792229222936395049645978690012817989.78105021050210662108221098211141100014368956.53118031180311982121621234112520110015959948.241311313113133121351113710139091200175410939.91442514425146441486315082153001300191311931.61576615766160051624416482167211400207612948.317137171371739617655179141817315002239139651849318493187721905119331196101600240314987.81986819868201682046820768210671700256616004.52125121251215712189122211225311800272917021.222642226422298223323236632400419002897180692405224052244132477525136254972000306419110.62545025450258332621526597269792100323220158.42686826868272712767428077284812200339921200282862828628710291342955829982(4)、锅炉热平衡及燃料消耗量计算名称公式结果冷空气温度tlk任务书给定20.000冷空气焓Ilk查图表得99.040燃料比热Crl4.19*Mar/100+1.1*(100-Mar)/1001.285燃料物理热QrlwCrl*tlk25.708燃料拥有热量Qrl任务书给定(Qar)24300.000排烟温度tpy任务书给定（tpy）158.000排烟焓Ipy内插值法1871.770气体未完全燃烧损失qqt[1]第二章0.000固体未完全燃烧热损失qgt[1]第二章0.500排烟热损失qpy(Ipy-apy*Ilk)*(100-qgt)/Qrl7.129外部冷却损失qlq制造厂商提供数据（我们取0.5）0.400锅炉效率x1100-(qqt+qgt+qpy+qlq)91.971过热蒸汽出口焓igr查图表得3474.965饱和水焓ibh查图表得1623.200给水焓igs查图表得1039.258排污率Ppw任务书给定2.000再热蒸汽进口焓izr1查图表得3088.956再热蒸汽出口焓izr2查图表得3584.281锅炉总吸热量QglD*(igr-igs)+pw/100*D*(ibh-igs)+Dzr*(izr2-izr1)317336.247燃料消耗量BQgl/(Qar*xl/100)14.199计算燃料消耗量BjB*(1-qgt/100)14.128热空气焓irk查上表2385.750空气预热器吸热量Qkybeta*(irk-Ilk)2423.913空气预热器吸热量占燃料热量的比例bkyQky/Qrl*1009.975保热系数Cbr1/(1+qlq/(xl+bky))0.996三、炉膛设计和传热计算1、燃烧室尺寸及炉墙面积的确定项目公式结果炉膛截面热负荷qF根据手册第七章选取4000.000炉膛截面积FBj*Qar/qf85.829炉膛宽深尺寸abSQRT(F)9.264水冷壁管子间的节距S根据实际选取63.000修正后炉膛宽深为aaINT(ab/(s/1000))*s/10009.261炉膛容积热负荷qv参考图6-81[1]185.800炉膛容积VlB*Qar/qv1857.046燃烧室炉墙面积的确定侧墙面积Fc参照实际选取200.545前墙面积Fq参照实际选取267.550后墙面积Fh参照实际选取177.556炉顶面积Fld参照实际选取34.025出口窗面积Fcqc参照实际选取57.177炉膛总面积Fz2*Fc+Fq+Fh+Fld+Fcqc937.398炉膛容积核算核算容积Vhsaa*Fc1857.247炉膛容积校核容积热负荷qvxBj*Qar/Vhs184.8512、燃烧器特性计算项目公式结果炉膛出口过量空气系数aa1.150炉膛漏风系数daldal0.050一次风百分比Rf1参照实际选取30.000漏风百分比Rfldal/a*1004.348二次风百分比Rf2100-Rf1-Rfl65.652一次风温tf1参照实际选取20.000二次风温tyktyk285.000一次风体积流量Vf1Rf1/100*beta*V0*Bj*(273+tf1)/27330.075二次风体积流量Vf2Rf2/100*beta*V0*Bj*(273+tyk)/273125.342一次风出口速度Wf1参照实际选取25.000二次风出口速度Wf2参照实际选取50.000燃烧器个数n参照实际选取8.000每个燃烧器的风口数m参照实际选取3.000一次风出口截面积Ff1Vf1/(n*m*Wf1)0.050二次风出口截面积Ff2vf2/(n*m*Wf2)0.1043、炉膛结构特性计算项目公式结果水冷壁管子直径db参照实际选取42.000水冷壁管子厚度hb参照实际选取5.000节距Sb参照实际选取63.000相对值S/dSb/db1.500壁管与炉墙的距离Egb参照实际选取0.000相对值Egb/dEgb/db0.000角系数Xb查图表得0.960炉墙面积FZFz937.398水冷壁有效辐射面积FbXb*Fz899.902灰污系数Cfb查图表得0.450水冷壁平均热有