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 司二零一二年六月动力公司热力车间烟气余热回收RJ热 力 计 算 书序号名称符号公 式 及 来 源数值单位一余热回收规范1进口烟气温度Q给定1702出口烟气温度P给定253进口水温t给定304出口水温t给定455平均水温t37.56冷空气温度tlk给定20二 燃料特性 (天燃气)1CH495.9495%2C2H40%3C2H60.9075%4C3H80.1367%5C4H100%6C5H120%7H20%8O20%9CO0%10CO23%11H2S0.002%12N20%13H2O0.0062%
2、14应用基低位发热量Qdwy35160kJ/m3三 燃料燃烧产物计算1理论空气量V0.04760.5CO+0.5H2+1.5H2S+(m+n/4)CmHn-O29.3183Nm3/kg2N2理论容积VN20.79V0+N2/1007.3614Nm3/kg3RO2容积VRO20.01(CO2+CO+H2S+mCmHn)1.0118Nm3/kg4H2O理论容积VH2O0.01(H2S+H2+nCmHn/2+0.124dq)+0.016V02.1008Nm3/kg四 烟气容积及特性计算1平均过量空气系数apj取定1.052实际水蒸汽容积VH2OV0H2O+0.0161(pj-1)V02.10830N
3、m3/Nm33烟气总容积VyVRO2+V0N2+VH2O+(pj-1)V010.9474Nm3/Nm34R2O容积份额rRO2VRO2/Vy0.0924%5H2O容积份额rH2OVH2O/Vy0.1926%6三原子气体份额rrRO2+rH2O0.2850%7烟气总重量Gy1-Ay/100+1.306apjV013.7781kg/Nm3 五烟气温焓表(见后)六回收热量热力计算12345保温系数0.98006烟气进口温度1707进口烟焓I3105.46kJ/Nm38烟气出口温度先假设309出口烟焓I247.16kJ/Nm310 烟气放热量Qrp(I-I)2801.130154kJ/Nm3热功率W2
4、.421794884MW.节能器热力计算序号名 称符号计算公式或来源数 值单位1进口烟温l由上表决定170.002进口烟焓I查焓温表3105.46KJ/m33出口烟温l假定50.004出口烟气绝对温度Tll+273323.00K5出口烟焓Il查焓温表247.16KJ/m36烟气侧对流放热量Qrp(I-I-(I+I)/2)0.96（3640.52-2659.63）2801.13KJ/m37工质流量Dgz设计给定#REF!kg/s8给水温度t1设计给定30.009给水焓i1查附录，二126.28KJ/kg10 节能器出口水焓Ii1QrpBj/Dgz=85.1942.94158.301336000.
5、56#REF!KJ/kg11节能器出口水温度t查附录，二#REF!12 平均水温tpj(t1+t2)/2=2037.89）2#REF!13 最大温差td =228-37.89#REF!14 最小温差tx=167.5-2020.0015受热面的平均温降t(td-tx)/ln(td/tx)#REF!16 平均烟温pjtpj+t=28.94+167.91#REF!17 导热系数查表3-2#REF!W/(mK)18 运动粘度系数查表3-2#REF!m2/s序号名 称符号计算公式或来源数 值单位19烟气普朗特准则数Pr查表3-20.660100crrrQQQ-21t11t动力公司热力车间烟气余热回收RJ
6、热 力 计 算 书序号名称符号公 式 及 来 源数值单位20平均烟气的绝对温度Tpj+273=196.85+273#REF!K21 烟气流通面积Fab-n（ldl+n21D）-ca0.084m222 烟气容积VyVRO2+VH2O+VN20+(pj-1)V0#REF!m3/kg23烟气中水蒸汽容积份额rH2OVH2O/Vy#REF!24烟气中三原子气体容积份额rRO2VRO2/VyNm3/kg25 烟气中飞灰浓度f hAar a f h/(100Gy)=00.2/（10013.908）#REF!kg/kg26 管径d设计给定0.026m27 辐射层有效厚度s =0.90.0260.0234m2
7、8 烟气流速wyBj Vy(pj+273)/(273F)=158.3013360011.4770469.85（0.084273）#REF!m/s29 横向节距1结构给定75.00mm30 修正系数Cs=0.99910,Cz=11.0032 烟气对流换热系数dCsCz/d（wd/）0.6Pr0.33#REF!W/(m2)33 管壁灰污温度tb按热力计算标准方法按7-36条#REF!34管壁灰污绝对温度Tbtb+273=53.94+273#REF!K35 炉内压力p给定0.104MPa36三原子气体减弱系数Kq#REF!1/m.MPa37碳黑粒子减弱系数Kg#REF!1/m.MPa38 烟气辐射吸
8、收力kps(kq+kg)ps=（15.3419+0.2076）0.1040.0234#REF!39 烟气黑度ay1-EXP(-kps)#REF!40 辐射放热系数f5.710-8(1+ab)/2 ayTy3(1-(Tb/Ty)4)/(1-Tb/Ty)#REF!W/(m2)41 热有效系数按753，表710.9042 传热系数k#REF!W/m243 受热面积H 2.59m244 传热量QchHt k/Bj103=2.59167.994.56158.301310003600#REF!KJ/m345 误差百分数e（Qrp-Qch）/Qrp100%=（942.94-936.56）942.94100#
9、REF!2%排烟温度校核46常压节能器出口烟焓I1I+Ilk-Qch/=3640+0.1248-936/0.962689.80KJ/kg47常压节能器出口烟温1查烟气焓温表 校核（1)给定-（1）计算=167-176=910176.00热力计算汇总表序号名 称符号单位热平衡(炉膛)节能器1热效率%#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smm550145对流管尺寸smm3236进口烟温#REF!#REF!ddFV9.046.36.3qoHrTpsr)100037.01)(02.1109.5491.2(2)5.057.104(9.0)
10、(fdnmpyHCnmT12.0)5.010006.1)(2(306.04/)(26.022212ddnnndL动力公司热力车间烟气余热回收RJ热 力 计 算 书序号名称符号公 式 及 来 源数值单位7出口烟温#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/Q%#REF!#REF!13平均过剩空气系数pj1.101.1014热力计算误差校核QQnet.q/100-（Qf+Qcr1+Qcr2+Qcr3+Qcr4）(1-q4/100)=3558889.46100-（1
11、1157.5+16635.8+2882.6+936.6）（1-0100）#REF!15比值%（Q/Qnet.q）100%255.735588100%0.49%0.5%，合格0.49动力公司热力车间烟气余热回收RJ热 力 计 算 书序号名称符号公 式 及 来 源数值单位Nm3/Nm3Nm3/Nm3100-200435.9705032I200-300364.7772851300-400247.1639248 烟 气 温 焓 表VRO2=1.01177Nm3/Nm3V0N2=7.36142Nm3/Nm3V0H2O=2.1008Nm3/Nm3I0yI0KIy=I0y+(-1)I0k(C)RO2VRO2
12、(C)RO2(C)N2V0N2(C)N2(C)H2OV0H2O(C)H2O(KJ/Nm3)(KJ/Nm3)(KJ/Nm3)C3+5+7(C)KV0(C)KII123456789101112100170172.00022130956.9852301151317.22122841446.206678132 1230.0102281507.70719200358362.2122282601913.97046304638.64406242914.826751266 2478.6569743038.7595991531.052409300559565.5771943922885.67854463972.
13、67171344423.927447403 3755.2584984611.6903721572.930773400772781.0833525273879.4708946261315.1025765975.656822542 5050.4965416228.1816491616.4912775009961007.7189366644887.9860987951670.1382557565.84329684 6373.6893617884.5277581656.34610860012231237.3898188045918.5855779672031.4763439187.451738830
14、7734.1552199574.1594991689.63174170014611478.1901269466963.90790511472409.62085410851.71889980 9131.89411411308.313591734.15409280017041724.04926410938046.03735813362806.6725912576.759211130 10529.6330113103.240861794.92727190019511973.95546612439150.25108515243201.62352314325.830071281 11936.690161
15、4922.664581819.42372100022022227.908732139410261.8262417253623.88489316113.619861436 13381.0203516782.670881860.006298110024582486.920828154511373.4013919264046.14626417906.468481595 14862.6235818649.599661866.92878120027172748.968222169612484.9765421314476.81084519710.755611754 16344.2268120527.966
16、951878.367289130029773012.027382185113625.9973923454926.38265221564.407431913 17825.8300422455.698931927.73198140032413279.133606201014796.4639425585373.85365723449.451212077 19354.0245724417.152431961.453505150035043545.228064216515937.4847927805840.23188625322.944742240 20872.9008326366.589791949.
17、437352160037683812.334288232417107.9513430026306.61011627226.89575240322391.777128346.48461979.894818170040364083.487576248318278.417932286781.39155729143.297032567 23919.9716230339.295611992.811006180043044354.640864264219448.8844534587264.5762131068.101522730 25438.8478932340.043912000.74830419004
18、5724625.794152280520648.796736897749.86166533024.452512897 26994.9971934374.202372034.158459200048444900.994504296421819.2632539278249.8527434970.110493065 28560.4647536398.133732023.931356210051165176.194856312823026.5369241628743.54140736946.273183232 30116.6140638452.103892053.970159220000#REF!#REF!#REF!#REF!0
