余热锅炉热力计算

1、热力计算书、余热锅炉设计参数1锅炉蒸发量DKg/h给定330.02额定工作压力PMpa给定0.503饱和温度tbhC查表158.94给水温度tgsC设计205冷空气温度tlkC设计30、设计用代表性天然气成分分析锅炉计算手册表5-111甲烷CH4%95.02乙烷CH26%2.43氢气H2%1.04一氧化碳CO%0.15-氧化碳CO2%0.56氮气N2%1.07燃料低发热值QkJ/Nm335588三、燃烧产物计算(1)理论1理论空气量VoNm3/Nm3(0.5H.5CO+2CH+35CH)/2124269.4742氮气理论容积V0N2Nm3/Nm3079V0+001N27.4943三原子气体容积

2、VR02Nm3/Nm30.01(CO+CO+2CH+CH)22641.0044水蒸气理论容积V0H2ONm3/Nm3001(H,+3C,H6+2CH4)+0-0161V02.135(2)燃烧1过剩空气系数a选取1.22实际水蒸气容积VH2ONm3/Nm3V+00161(a-1)V02.1653实际氮气容积VN2Nm3/Nm30.79aV+001N28.994过量氧气容积VO2Nm3/Nm30.21(a-1)V00.405烟气容积VyNm3/Nm3V+V+V+VR02N2H2OO212.566RO2容积份额YRO2V/VR02y0.0807H2O容积份额YH2OV/VH2Oy0.1728三原子气

3、体总容积份额Y丫+YRO2H2O0.252附AINm3气体的焓(KJ/Nm3)vv锅炉计算手册表2-21(C)(C9)CO2(C9)(C9)(C9)K7100170130H5O13220035726030426630055939246340340077252762654250099466479568460012258049698307001462948114997880017051094133411299001952124215261282100022041392172314371100245815441925159512002717169721321753130029771853234419

4、14140032392009255920761500350321662779223916003769232530022403170040362484322925671800430526443458273119004574280436902899200048442965392630662100511531274163323422005387328944023402230056593452464435712400593036154887374025006203377951323910四、A温焓表iy(C)IR02I0N2I0H2O10K1.27100170.68974.26322.311250.5

5、41717.36200358.431948.52648.902520.033459.85300561.242937.77988.293817.955250.88400775.093949.501336.215134.807087.76500997.984976.221696.956480.098967.166001229.906025.422068.367863.2610896.347001467.857104.612452.579265.3912878.108001711.828198.772847.4610695.9314897.249001959.819307.933257.291214

6、5.4216954.1210002212.8210432.083677.7913613.8619045.4611002467.8311571.214108.9715110.7321170.1612002727.8712717.844550.8116607.5923318.0413002988.9113886.965003.3318132.8725505.7714003251.9615056.075462.2619667.6327703.8115003517.0116232.675931.8521211.8629923.9116003784.0817424.276407.8522765.5632

7、169.3117004052.1418615.866892.3924319.2734424.2518004322.2219814.957381.2025872.9736692.9719004592.3021014.047876.4127464.5738975.6620004863.3822220.638380.1629046.7041273.5021005135.4623434.718886.0430638.3043583.8722005408.5524648.789396.1932229.9045899.5123005681.6425870.369912.7533830.9748230.94

8、24005953.7227091.9310431.435432.0550563.5025006227.8128321.0010954.437042.6052911.73五、余热锅炉热平衡计算1锅炉额定烝发量DKg/S0.0922给水焓igsKJ/Kg84.003饱和蒸汽焓1“KJ/Kg2756.724锅炉有效吸热量QyxKJ/S245.005散热损失q%锅炉计算手册表7-43.006锅炉热效率n%100-q97.00六、锅炉结构特性计算（一烟管的计算1烟管外径Dwmm设计322烟管壁厚Smm设计33烟管内径DnmmD-2Sw264烟管长度Lmm设计20005烟管数量n根设计1456对流受热面积

9、Hdlm2nnDnL23.6887烟气流通截面积Fym2nnDn2/40.0778螺纹节距Pmm设计369螺纹深度emm设计2.5七烟管热力计算1排烟量VpyNm3/h16002进口烟气温度9C炉胆出口烟温600.03进口烟焓1KJ/Nm3查温焓表10896.344出口烟气温度9“C取排烟温度1905出口烟焓1”KJ/Nm3查温焓表3285.606烟气热平衡放热量QrpKJ/SVpy/Vy*()/3600269.357烟气平均温度9pjC(9+9)/2395.008大温压AtdC9-tbh441.19小温压AtxC9“-tbh31.1410传热平均温压AtC(At-At)/ln(Atd/Atx

10、)dx154.6711烟气流速Wym/sVy(9+273)/(273F)/360014.1312平均成分烟气动粘性系数Vrm2/s锅炉计算手册表2-46(300400)59.7E-613平均成分烟气导热系数入rKJ/(msC)锅炉计算手册表2-46(300400)65.6E-614平均成分烟气Pr值Prr-锅炉计算手册表2-46(300400)0.64115系数MV锅炉原理图1151.00516系数M入锅炉原理图1151.00517系数mdPr锅炉原理图1151.0118烟气动粘性系数Vm2/sMVvr59.9E-619烟气导热系数入KJ/(msC)M入入r65.9E-620烟气Pr值PrMP

11、prrr0.6521雷诺数ReWD/vyn6126.5022对流放热系数adKW/(m2C)0.0144入/dReo.9206(p/d)0.08(/d)0.1120.083923灰壁温度ThbCt+At+273取At=60s491.8624有效辐射层厚度Z_-/r上一-石1、.riSm0.9Dn0.023425二原子气体辐射减弱系数Kq1/(m.MPa)102.6926烟气黑度ay1eKq.rq.P.s0.05927辐射放热系数afKW/(m2C)0.002528烟气侧放热系数a1KW/(m2C)a+adf0.086429热有效系数锅炉计算手册表10680.8530传热系数KKW/(m2C)叭

12、al0.073431传热量QcrKJ/SKHAtdl268.9932相对误差AQ%100(QQ/Qrpcrrp0.1333允许相对误差AQ%2、1.1.l亠【Ez-、r.丄j“1八汽水边与烟气边热平衡计算1热平衡放热量Qrp烟管热力计算269.353锅炉效吸热量QyxKJ/S245.004相对误差AQnQQyx/QrpJrp0.065允许误差AQ0.5阻力计算书一烟管进口阻力1管子内径dnmm26.002烟气流通截面积Fm2热力计算0.0773进口烟温9C热力计算600.004标准状况下烟气密度P0kg/m3(1+1.306aV0)/Vy1.2625烟气实际密度Pkg/m3273P0/(273

13、+9)0.3956烟气流速Wm/sVpy(273+9)/(273F)/360018.467局部阻力系数g查表0.858进口阻力h2PagpW2/257.16二烟管出口阻力1出口烟温9C热力计算190.002烟气实际密度pkg/m3273P0/(273+9)0.7443烟气流速Wm/sVpy(273+9)/(273F)/36009.794局部阻力系数g查表1.105出口阻力h3PagpW2/239.23三烟管沿程阻力1平均烟温9C热力计算395.002烟气实际密度pkg/m3273p0/(273+9)0.5163烟气流速Wm/s热力计算14.134管束长度lmm设计2000.05雷诺数Re热力计算6126.506阻力系数入式3-230.0957沿程阻力h4Pa入(l/dn)pW2/2376.5726燃气计算书四烟囱出口阻力1烟囱直径dmm设计350.002烟气流通截面积Fm