烟气余热回收技术参数换算公式

烟气余热回收技术参数换算公式烟气余热回收利用的理论计算烟气显热回收量的计算理论空气量的焓值： hko=2.96143+1.27821t+1.82909×10-4t2-2.59493×式中：t——烟气温度（℃）。理论烟气量的焓值：二氧化碳焓值 hCO2=-6.53509+1.68067t+7.7798×10-4t2-2.9419×氮气焓值 hN2=5.37036+1.23589t+1.77044×10-4t2-2.53217×水蒸气焓值 hH2O=4.75735+1.446t+2.5429×10-4t2根据以上拟合公式，可得理论烟气焓值为： hyo=Vihi 式中：hyo——标态下理论烟气焓值（KJ/mVi——标态下烟气中各组分的体积（m3/m3）；hi——标态下烟气中各组分的焓值（KJ/m3）。实际烟气的熔值 hy=hyo+(α-1)hk式中：hy——标态下实际烟气焓值（KJ/m3）；α——过量空气系数；hko——标态下理论空气量焓值（KJ/m回收烟气显热量： Qs=hy1-hy2 式中：Qs——标态下回收烟气焓值（KJ/m3）；hy1——标态下烟气进口温度焓值（KJ/m3）；hy2——标态下烟气出口温度焓值（KJ/m3）。烟气潜热回收量的计算冷凝水的水蒸气容积为： VH2OC=VH2式中：VH2OC——标态下冷凝的水蒸气容积（mVH2O——Ps——对应温度水蒸气饱和压力（Pa）；Py——烟气压力（Pa）；Vy——烟气容积（m3）。冷凝的水质量为： mH2OC=VH2冷凝率为： ∅=VH2OCVH2水蒸气的潜热计算参照下式： γH2O=2501.40526-2.33661t-0.00176t2+6.11591×10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： Q1=mH2OCγ烟气余热理论回收总热量烟气余热理论回收总热量应按式A.13计算： Qr=Qs+Q1 式中：Qs——回收显热量的值（KJ/m3）。节能率节能率应按式A.14计算： ηyrh=Qr-QdB式中：ηyrh——烟气冷凝热能回收装置的节能率；Qr——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）；Bg——燃气锅炉的标准状态下燃气流量，单位为立方米每秒（m3/s）；qdw——燃气低位发热量，单位为千焦每立方米（KJ/m3）。烟气余热回收技术参数理论计算烟气余热回收技术参数理论计算见表A.1。烟气余热回收技术参数理论换算表烟气温度℃显热KJ/m³潜热KJ/m³总焓值KJ/m³理论回收总热量KJ/m³冷凝水量KJ/m³冷凝水率％理论节能率％1802945.340.002945.340.000.00001702779.880.002779.88165.460.0000.51602614.940.002614.94330.400.00011502450.530.002450.53494.810.0001.51402286.660.002286.66658.680.00021302123.330.002123.33822.010.0002.41201960.530.001960.53984.810.0002.91101798.280.001798.281147.060.0003.41001636.580.001636.581308.760.0003.9901475.420.001475.421469.920.0004.4801314.810.001314.811630.530.0004.8701154.750.001154.751790.590.0005.360995.260.00995.261950.080.0005.855915.72450.161365.872479.780.1877.454899.82768.111667.932813.620.31128.453883.941067.811951.753129.210.43179.352868.061350.442218.503427.720.542210.251852.181617.092469.273710.250.65261150836.321868.752705.073977.780.753011.849820.452106.352926.804231.230.843412.648804.602330.733135.324471.470.943813.347788.742542.683331.434699.281.02411446772.902742.953515.854915.391.104414.645757.062932.203689.265120.491.184715.244741.223111.083852.305315.201.255015.843725.393280.164005.565500.111.325316.342709.573440.014149.585675.781.385616.941693.753591.144284.895842.731.455817.340677.943734.014411.956001.421.506017.839662.133869.104531.236152.311.566318.3表A.1烟气余热回收技术参数理论换算表（续）烟气温度℃显热KJ/m³潜热KJ/m³总焓值KJ/m³理论回收总热量KJ/m³冷凝水量KJ/m³冷凝水率％理论节能率％38646.333996.814643.146295.821.616518.737630.531117.554748.086432.351.666719.136614.744231.684846.436562.281.716919.535598.964339.564938.526685.941.757019.834583.181441.525024.706803.671.797220.233567.414537.865105.276915.791.837420.532551.644628.885180.527022.571.877520.831535.884714.855250.737124.311.917721.230520.124796.045316.167221.261.917821.429504.374872.695377.0673L3.661.977921.728488.634945.045433.677401.752.00802227472.895013.305486.197485.752.038222.226457.165077.695534.847565.872.068322.525441.435138.405579.837642.312.088422.724425.715195.62562l.337715.252.118522.923409.995249.535659.527784.882.138623.122391.285300.305694.587851.362.15