余热锅炉热力计算

热力计算书一、余热锅炉设计参数12345锅炉蒸发量额定工作压力饱和温度给水温度DPtbhtgstlkCH4C2H6H2COCO2N2QKg/hMpa℃℃℃%%%%%%kJ/Nm3给定给定查表设计设计《锅炉计算手册》表5-1195.02.41.00.10.51.035588330.00.50158.92030冷空气温度设计用代表性天然气成二、分分析1甲烷234567乙烷氢气一氧化碳二氧化碳氮气燃料低发热值三、燃烧产物计算（1）理论1理论空气量23氮气理论容积三原子气体容积VOVN20VR02VH2O0Nm3/Nm3Nm3/Nm3Nm3/Nm3Nm3/Nm3（0.5H2+0.5CO+2CH4+3.5C2H6）/219.4747.4941.0042.1350.79V0+0.01N20.01（CO2+CO+2C2H6+CH4）0.01（H2+3C2H6+2CH4）+0.0161V04水蒸气理论容积（2）燃烧1过剩空气系数2345678实际水蒸气容积实际氮气容积过量氧气容积烟气容积RO2容积份额H2O容积份额三原子气体总容积份额αVH2OVN2VO2VyγRO2γH2OγNm3/Nm3Nm/Nm333选取VH2O0+0.0161(α-1)V00.79αV0+0.01N20.21（α-1）V0VR02+VN2+VH2O+VO2VR02/VyVH2O/VyγRO2+γH2O1.22.1658.990.4012.560.0800.1720.252Nm3/Nm3Nm/Nm326燃气计算书

33附1Nm气体的焓(KJ/Nm)θ（C（Cθ）（Cθ）CO2(℃)θ）H2O100170130151<<锅炉计算手册>> 表2-21（Cθ）K132266403542684830978112912821437159517531914207622392403256727312899306632343402357137403910200300400500600700800900100011001200130014001500160017001800190020002100220023002400250035726055939277252799466412258041462948170510941952124222041392245815442717169729771853323920093503216637692325403624844305264445742804484429655115312753873289565934525930361562033779304463626795969114913341526172319252132234425592779300232293458369039264163440246444887513226燃气计算书

四、温焓表θIRO2(℃)1002003004005006007008009001000110012001300140015001600170018001900200021002200230024002500IyIN20170.68358.43561.24775.09997.981229.901467.851711.821959.812212.822467.832727.872988.913251.963517.013784.084052.144322.224592.304863.385135.465408.555681.645953.726227.81974.261948.522937.773949.504976.226025.427104.618198.779307.93IH2O0322.31648.90988.291336.211696.952068.362452.572847.463257.293677.794108.974550.815003.335462.265931.856407.856892.397381.207876.418380.168886.049396.199912.7510431.410954.4IK01250.542520.033817.955134.806480.097863.269265.3910695.9312145.4213613.8615110.7316607.5918132.8719667.6321211.8622765.5624319.2725872.9727464.5729046.7030638.3032229.9033830.9735432.0537042.601.21717.363459.855250.887087.768967.1610896.3412878.1014897.2416954.1219045.4621170.1623318.0425505.7727703.8129923.9132169.3134424.2536692.9738975.6641273.5043583.8745899.5148230.9450563.5052911.7310432.0811571.2112717.8413886.9615056.0716232.6717424.2718615.8619814.9521014.0422220.6323434.7124648.7825870.3627091.9328321.0026燃气计算书

五、余热锅炉热平衡计算123456锅炉额定蒸发量给水焓饱和蒸汽焓锅炉有效吸热量散热损失锅炉热效率DigsI“QyxqηKg/SKJ/KgKJ/KgKJ/S%%《锅炉计算手册》表7-4100-q0.09284.002756.72245.003.0097.00六、锅炉结构特性计算（一烟管的计算）1烟管外径23456789烟管壁厚烟管内径烟管长度烟管数量对流受热面积烟气流通截面积螺纹节距螺纹深度DwSDnLnHdlFyPεmmmmmmmm根m2m2mmmm设计设计Dw-2S设计设计nπDnLnπDn2/4设计设计32326200014523.6880.077362.526燃气计算书

七1234567891011121314烟管热力计算排烟量进口烟气温度进口烟焓出口烟气温度出口烟焓烟气热平衡放热量烟气平均温度大温压小温压传热平均温压烟气流速平均成分烟气动粘性系数平均成分烟气导热系数平均成分烟气Pr值Vpyθ’I‘θ“I”QrpθpjΔtdΔtxΔtWyVrλrPrrNm/h℃KJ/Nm3℃KJ/NmKJ/S℃℃℃℃m/sm2/s--331600炉胆出口烟温查温焓表取排烟温度查温焓表Vpy/Vy*（I‘-I\"）/3600(θ’+θ\")/2θ’-tbhθ“-tbh(Δtd-Δtx)/ln(Δtd/Δtx)Vy(θpj+273)/(273Fy)/3600 《锅炉计算手册》表2-46(300~400)600.010896.341903285.60269.35395.00441.131.14154.6714.1359.7E-665.6E-60.641KJ/(ms℃) 《锅炉计算手册》表2-46(300~400) 《锅炉计算手册》表2-46(300~400)26燃气计算书

15161718192021222324252627282930313233八1345系数系数系数烟气动粘性系数烟气导热系数烟气Pr值雷诺数对流放热系数灰壁温度有效辐射层厚度三原子气体辐射减弱系数烟气黑度辐射放热系数烟气侧放热系数热有效系数传热系数传热量相对误差允许相对误差汽水边与烟气边热平衡计算热平衡放热量锅炉效吸热量相对误差允许误差MνMλMPrνλPrReαdThbSKqayαfα1ψKQcrΔQ[ΔQ]------m2/sKJ/(ms℃)《锅炉原理》图11-5《锅炉原理》图11-5《锅炉原理》图11-5MvVrMλλrMprPrrWyDn/ν0.0144λ/dRe0.9206（P/d）-0.08（ε/d）0.1121.0051.0051.0159.9E-665.9E-60.656126.500.0839491.860.0234102.690.0590.00250.08640.850.0734268.990.13±2----KW/(m2℃)℃m1/(m.MPa)ts+Δt+273 取Δt=600.9Dn1-e-Kq.rq.P.Sαd+αf《锅炉计算手册》表10-68ψ.α1KHdlΔt100(Qrp-Qcr)/Qrp--KW/(m2℃)KW/(m2℃)--KW/(m2℃)KJ/S%%QrpQyxΔQ[ΔQ]KJ/S烟管热力计算[ηQrp-Qyx]/Qrp269.35245.000.06±0.526燃气计算书

阻力计算书一12345678二12345三1234567烟管进口阻力管子内径烟气流通截面积进口烟温标准状况下烟气密度烟气实际密度烟气流速局部阻力系数进口阻力烟管出口阻力出口烟温烟气实际密度烟气流速局部阻力系数出口阻力烟管沿程阻力平均烟温烟气实际密度烟气流速管束长度雷诺数阻力系数沿程阻力θρWlReλ△h4℃kg/ m3m/smm————Pa热力计算273ρ0/(273+θ)热力计算设计热力计算式3-23λ（l/dn）ρW 2/2395.000.51614.132000.06126.500.095376.57θρWξ△h3Pa℃kg/ m3m/s热力计算273ρ0/(273+θ)Vpy(273+θ)/(273F)/3600查表ξρW2/2190.000.7449.791.1039.23dnFθρ0mmm2℃kg/ mm/sPa326.00热力计算热力计算（1+1.306αV）/Vy273ρ0/(273+θ)Vpy(273+θ)/(273F)/3600查表ξρW2/200.077600.001.2620.39518.460.8557.16ρWξ△h2kg/ m326燃气计算书

四12345678五123烟囱出口阻力烟囱直径烟气流通截面积烟气温度烟气实际密度烟气流速局部阻力系数烟囱出口阻力烟囱出口烟气动压头鼓风机风压烟气行程总阻力流量备用系数鼓风机风压△h’β△hPaβ△h’Pa∑△hi520.921.10573.01dFθρWξ△h8△h9PaPammm2℃kg/ m3m/s设计πd/4取排烟温度273ρ/(273+θ)Vpy(273+θ)/(273F)/3600查表ξρW2/2ρW2/202350.000.096190.000.7447.831.1025.1222.84