锅炉余热回收热力计算(1)

CWNS1.4-85/65-Y型常压内燃三回程湿背式燃气热水锅炉热力计算书RJ有限公司二零一二年六月序号名称符号数值单位一1进口烟气温度Q170℃2出口烟气温度P25℃3进口水温t'30℃4出口水温t45℃5平均水温t37.5℃6冷空气温度tlk20℃二1CH495.9495%2C2H40%3C2H60.9075%4C3H80.1367%5C4H100%6C5H120%7H20%8O20%9CO0%10CO23%11H2S0.002%12N20%13H2O0.0062%14应用基低位发热量Qdwy35160kJ/m3三1理论空气量V°9.3183Nm3/kg2N2理论容积V°N27.3614Nm3/kg3RO2容积VRO21.0118Nm3/kg4H2O理论容积V°H2O2.1008Nm3/kg四1平均过量空气系数apj1.052实际水蒸汽容积VH2O2.10830Nm3/Nm33烟气总容积Vy10.9474Nm3/Nm34R2O容积份额rRO20.0924%5H2O容积份额rH2O0.1926%VRO2/VyVH2O/Vy0.01(H2S+H2+∑nCmHn/2+0.124dq)+0.016V0烟气容积及特性计算取定V0H2O+0.0161(αpj-1)V0VRO2+V0N2+VH2O+(αpj-1)V0燃料燃烧产物计算0.0476［0.5CO+0.5H2+1.5H2S+∑(m+n/4)CmHn-O2］0.79V0+N2/1000.01(CO2+CO+H2S+∑mCmHn)给定给定给定燃料特性(天燃气)烟气余热回收热力计算书公式及来源余热回收规范给定给定RJ动力公司热力车间序号名称符号数值单位烟气余热回收热力计算书公式及来源RJ动力公司热力车间6三原子气体份额r0.2850%7烟气总重量Gy13.7781kg/Nm3五六12345保温系数φ0.98006烟气进口温度υ'170℃7进口烟焓I'3105.46kJ/Nm38烟气出口温度υ30℃9出口烟焓I247.16kJ/Nm310烟气放热量Qrp2801.130154kJ/Nm3热功率W2.421794884MW序号名称符号数值单位1进口烟温θl170.00℃2进口烟焓I′3105.46KJ/m33出口烟温θl〞50.00℃4出口烟气绝对温度Tl〞323.00K5出口烟焓Il〞247.16KJ/m36烟气侧对流放热量Qrp2801.13KJ/m37工质流量Dgz#REF!kg/s8给水温度t130.00℃9给水焓i1126.28KJ/kg10节能器出口水焓I#REF!KJ/kg11节能器出口水温度t#REF!℃12平均水温tpj#REF!℃13最大温差△td#REF!℃14最小温差△tx20.00℃15受热面的平均温降△t#REF!℃16平均烟温θpj#REF!℃17导热系数λ#REF!W/(m·K)18运动粘度系数ν#REF!m2/s序号名称符号数值单位查表3-2查表3-2计算公式或来源查附录Ⅱ，二(t1+t2)/2=﹙20＋37.89）÷2=228-37.89=167.5-20(△td-△tx)/ln(△td/△tx)tpj+△t=28.94+167.91查焓温表ψ(I′-I〞-△α(I′+I〞)/2)＝0.96×（3640.52-2659.63）设计给定设计给定查附录Ⅱ，二i1＋QrpBj/Dgz=85.1＋942.94×Ⅸ.节能器热力计算计算公式或来源由上表决定查焓温表假定θl〞+273先假设ψ(I'-I)回收热量热力计算rRO2+rH2O1-Ay/100+1.306apjV0烟气温焓表(见后)100crrrQQQ-´21t11t序号名称符号数值单位烟气余热回收热力计算书公式及来源RJ动力公司热力车间19烟气普朗特准则数Pr0.66020平均烟气的绝对温度T#REF!K21烟气流通面积F0.084m222烟气容积Vy#REF!m3/kg23烟气中水蒸汽容积份额rH2O#REF!24烟气中三原子气体容积份额rRO2Nm3/kg25烟气中飞灰浓度μfh#REF!kg/kg26管径d0.026m27辐射层有效厚度s0.0234m28烟气流速wy#REF!m/s29横向节距σ175.00mm30修正系数Cs0.3431修正系数Cz1.0032烟气对流换热系数αd#REF!W/(m2·℃)33管壁灰污温度tb#REF!℃34管壁灰污绝对温度Tb#REF!K35炉内压力p0.104MPa36三原子气体减弱系数Kq#REF!1/m.MPa37碳黑粒子减弱系数Kg#REF!1/m.MPa38烟气辐射吸收力kps#REF!39烟气黑度ay#REF!40辐射放热系数αf#REF!W/(m2·℃)41热有效系数ψ0.9042传热系数k#REF!W/m2℃43受热面积H2.59m244传热量Qch#REF!KJ/m345误差百分数e#REF!2%排烟温度校核46常压节能器出口烟焓I12689.80KJ/kg47常压节能器出口烟温θ1176.00序号名称符号单位热平衡(炉膛)节能器1热效率η%#REF!2燃料消耗量Bm3/h#REF!3炉膛容积热负荷(×106)qvKW/m3#REF!4炉膛尺寸Φ×smm550×145对流管尺寸Φ×smm32×36进口烟温θ'℃#REF!#REF!I'+△аIlk-Qch/ψ=3640+0.1×248-936/0.96查烟气焓温表校核︳（θ1)给定-（θ1）计算︳=︳Ⅹ热力计算汇总表5.7×10-8(1+ab)/2ayTy3(1-(Tb/Ty)4)/(1-Tb/Ty)按7－53，表7－1H△tk/Bj×103=2.59×167.9×94.56÷﹙158.3013×1000﹚×3600（Qrp-Qch）/Qrp×100%=（942.94-tb+273=53.94+273给定(kq+kg)ps=（15.3419+0.2076）×0.1041-EXP(-kps)BjVy(θpj+273)/(273F)=158.3013÷结构给定ψσ=0.9991.7，Cs=0.34ψσ0.1由于Z210,Cz=1CsCzλ/d（wd/ν）0.6Pr0.33按热力计算标准方法按7-36条VRO2+VH2O+VN20+(αpj-1)V0VH2O/VyVRO2/VyAarafh/(100Gy)=0×0.2/（100×设计给定=0.9×0.026查表3-2θpj+273=196.85+273ab-n（ldl+n2×1×D）-caddFV9.046.36.3qoHrTpsr)100037.01)(02.1109.5491.2(2)5.057.104(9.0)(fdnmpyHCnmT12.0)5.010006.1)(2(306.04/)(26.022212ddnnndL序号名称符号数值单位烟气余热回收热力计算书公式及来源RJ动力公司热力车间7出口烟温θ℃#REF!#REF!8烟气流速wym/s#REF!9传热系数KW/m2℃#REF!10受热面积Hm2#REF!#REF!11吸热量QKJ/m3#REF!#REF!12吸热量百分比Q/ΣQ%#REF!#REF!13平均过剩空气系数αpj1.101.1014热力计算误差校核△Q#REF!15比值%0.49Qnet.qη/100-（△Q/Qnet.q）×100%＝255.7÷35588Nm3/Nm3Nm3/Nm3100-200435.9705032I200-300364.7772851300-400247.1639248I0y(KJ/Nm3)°C3+5+7(Cθ)KV0(Cθ)KI1234567891011100170172.00022130956.9852301151317.22122841446.2066781321230.0102281507.70719200358362.2122282601913.97046304638.64406242914.8267512662478.6569743038.759599300559565.5771943922885.67854463972.67171344423.9274474033755.2584984611.690372400772781.0833525273879.4708946261315.1025765975.6568225425050.4965416228.1816495009961007.7189366644887.9860987951670.1382557565.843296846373.6893617884.52775860012231237.3898188045918.5855779672031.4763439187.4517388307734.1552199574.15949970014611478.1901269466963.90790511472409.62085410851.718899809131.89411411308.3135980017041724.04926410938046.03735813362806.6725912576.75921113010529.6330113103.2408690019511973.95546612439150.25108515243201.62352314325.83007128111936.6901614922.66458100022022227.908732139410261.8262417253623.88489316113.61986143613381.0203516782.67088110024582486.920828154511373.4013919264046.14626417906.46848159514862.6235818649.59966120027172748.968222169612484.9765421314476.81084519710.75561175416344.2268120527.96695130029773012.027382185113625.9973923454926.38265221564.40743191317825.8300422455.69893140032413279.133606201014796.4639425585373.85365723449.45121207719354.0245724417.15243150035043545.228064216515937.4847927805840.23188625322.94474224020872.9008326366.58979160037683812.334288232417107.9513430026306.61011627226.89575240322391.777128346.4846170040364083.487576248318278.417932286781.39155729143.29703256723919.9716230339.29561180043044354.640864264219448.8844534587264.5762131068.10152273025438.8478932340.04391190045724625.794152280520648.796736897749.86166533024.45251289726994.9971934374.20237200048444900.994504296421819.2632539278249.8527434970.11049306528560.4647536398.13373210051165176.194856312823026.5369241628743.54140736946.27318323230116.6140638452.103892200000000(KJ/Nm3)(KJ/Nm3)θ(Cθ)RO2VRO2×(Cθ)RO2(Cθ)N2V0N2×(Cθ)N2(C