烟气余热回收技术参数换算公式.docx

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1、附录A烟气余热回收技术参数换算公式A.1烟气余热回收利用的理论计算A.1.1烟气显热回收量的计算理论空气量的焰值：=2.96143+1.27821t+1.82909X10-4t2-2.59493X10-8t3-1.13129X1012t4(A.1)式中：t一一烟气温度(C)O理论烟气量的焰值：a)二氧化碳焰值hc2=-6.53509+1.68067t+7.7798X104t2-2.9419X107t3-4.573851011t4(A.2)b)氮气焰值hN2=5.37036+1.23589t1.77044X104t2-2.53217X10-8t3-1.13002X1012t4(A.3)c)水蒸气

2、焰值hfl2o=4.75735+1.446t+2.5429X104t2+3.46706X10-8t3-1.66507X1011t4(A.4)根据以上拟合公式，可得理论烟气焰值为：h=Vihi(A.5)式中：好一一标态下理论烟气效值(KJma)；V,一一标态下烟气中各组分的体积(In/In):h.标态下烟气中各组分的熔值(KJmj)cd)实际烟气的熔值甸=蜀+(-1)墟(A.6)式中：h,标态下实际烟气均值(KJ)；过量空气系数；股一一标态下理论空气量熔值(KJm3)。回收烟气显热量：QS=hyl-hy2(A.7)式中：Qtl标态下回收烟气培值(KJnf1)；h,一标态下烟气进口温度焰值(KJ/

3、mD；2-标态下烟气出口温度焰值(KJ11r)。A.1.2烟气潜热回收量的计算冷凝水的水蒸气容积为:r小。-警Km2o=-1-.y（A.8）py式中：V2O一一标态下冷凝的水蒸气容积（m/m：）；Vh2o水蒸气容积（m）；PF对应温度水蒸气饱和压力（Pa）；P,烟气压力（Pa）；Vr烟气容积（?）。冷凝的水质量为：pSVymC_V2。-Py山一（1当X旦u刃Pyj22.4冷凝率为：C一切0=（A.10）VH2。（1-令水蒸气的潜热计算参照下式：Yh2O=2501.40526-2.33661t-0.00176t2+6.11591X10-5t3-1.0562X10-64+5.38223109t5（

4、A.11）式中：t烟气的露点温度与烟气出口的平均值。由上式可得烟气潜热回收量：Qi=mH2OYn2O（A.12）A.1.3烟气余热理论回收总热量烟气余热理论同收总热量应按式A.13计算：QT=QS+Qi（A.13）式中：Q.回收显热量的值（KJ11?）.A.1.4节能率节能率应按式A.14计算：加=誓100%（A.14）BgXQdw式中：y.一一烟气冷凝热能回收装置的节能率：Q1烟气余热理论回收总热量，单位为千瓦（KW）:Qd回收烟气冷凝热能所消耗能量（按发电平均效率折算为一次能源的能量），单位为千瓦（Kw）；Bt燃气锅炉的标准状态下燃气流量，单位为立方米每秒（m/s）；qt,一一燃气低位发热

5、量，单位为干焦每立方米（KJm3）o烟气余热同收技术参数理论计算见表A.1。表A.1烟气余热回收技术参数理论换算表烟气温度r显热KJm3潜热KW总焰值KJm三理论回收总热量KJ11P冷凝水量KJm3冷凝水率理论节能率%1802945.340.002945.340.OO0.00001702779.880.002779.88165.460.0000.51602614.940.002614.94330.400.00011502450.530.002450.53494.810.0001.51402286.660.002286.66658.680.00021302123.330.002123.33822

6、.010.0002.41201960.530.001960.53984.810.0002.91101798.280.001798.281147.060.0003.41001636.580.001636.581308.760.0003.9901475.420.001475.421469.920.0004.4801314.810.001314.811630.530.0004.8701154.750.001154.751790.590.0005.360995.260.00995.261950.080.0005.855915.72450.161365.872479.780.1877.454899.82

7、768.111667.932813.620.31128.453883.941067.811951.753129.210.43179.352868.061350.442218.503427.720.542210.251852.181617.092469.273710.250.6526115()836.321868.752705.073977.780.753011.849820.452106.352926.804231.230.843412.648804.602330.733135.324471.470.943813.347788.742542.683331.434699.281.02411446

8、772.902742.953515.854915.391.104414.645757.062932.203689.265120.491.184715.244741.223111.083852.305315.201.255015.843725.393280.164005.565500.111.325316.342709.573440.014149.585675.781.385616.941693.753591.144284.895842.731.455817.340677.943734.014411.956001.421.506017.839662.133869.104531.236152.31

9、1.566318.3表A.1烟气余热回收技术参数理论换算表（续）烟气温度eC显热KJm3潜热KJ/M总熔值KJm3理论回收总热量KJm3冷凝水量KJm3冷凝水率理论节能率%38646.333996.814643.146295.821.616518.737630.531117.554748.086432.351.666719.1烟气温度eC显热KJm3潜热KJm三总熔值KJm3理论回收总热量KJm3冷凝水量KJm3冷凝水率%理论节能率%36614.744231.684846.436562.281.716919.535598.964339.564938.526685.941.757019.8345

10、83.181441.525024.706803.671.797220.233567.414537.865105.276915.791.83742().532551.644628.885180.527022.571.877520.831535.884714.855250.737124.311.917721.230520.124796.045316.167221.261.917821.429504.374872.695377.0673L3.661.977921.728488.634945.045433.677401.752.00802227472.895013.305486.197485.752.

11、038222.226457.165077.695534.847565.872.068322.525441.435138.405579.837642.312.088422.724425.715195.625621.337715.252.118522.923409.995249.535659.527784.882.138623.122391.285300.305694.587851.362.158723.321378.585348.095726.667914.852.178723.520362.885393.045755.927975.512.198823.7注1：上表计算中天气低位发热量为33684KJm高位发热量为37348KJm过剩空气系数取L15。注2：饱和水蒸气分压力计算公式采用戈夫格雷奇公式。