锅炉热力计算

1、 锅 炉 热 平 衡 及 燃 料 消 耗 量 计 算序号名称符号 单位计算公式或公式来源符号数值1燃料带入热量Qrkj/kg QydwQr19866.002排烟温度Tsdc假定Tsd140.003排烟焓Hpykj/kg 查焓温表3-3Hpy1720.254冷空气温度tlkc给定tlk20.005理论冷空气焓H0lkkj/kg 查焓温表3-3H0lk144.876机械不完全燃烧热损失q4%取用q42.007化学不完全燃烧热损失q3%取用q30.008排烟热损失q2%Q2/Qr=(Hpy-py*H0lk)*(1-_q4/100)*100/Qrq27.419散热损失q5%查图2-15q50.4010

2、灰渣物理热损失q6%忽略q60.0011保热系数%1-q5/1001.0012锅炉总热损失q%q2+_q3+_q4+_q5+_q6q9.8113锅炉热效率gl%100-qgl90.1914过热蒸汽焓hgrkj/kg 查蒸汽特性表P=13.82MP,T=540Chgr3434.0015给水焓hgskj/kg 查蒸汽特性表P=15.68MP,T=540Chgs1016.4016过热蒸汽流量Dgrkg/h 已知Dgr4.20E+0517再热蒸汽出口焓hzrkj/kg 查蒸汽特性表P=2.48 MP, T=540Chzr3551.4018再热蒸汽进口焓hzrkj/kg 查蒸汽特性表P=2.6MP,T=

3、330Chzr3078.3019再热蒸汽流量Dzrkg/h 已知Dzr350000.0020再热蒸汽焓增量hzrkj/kg h_zr-hzrhzr473.1021锅炉有效利用热Qglkg/h Dgr*(hgr-hgs)+Dzr*(hgs-hzr)Qgl1.18E+0922实际燃料消耗量Bkg/h Qgl/(gl*Qr)B6.59E+0423计算燃料消耗量Bjkg/h B*(1-_q4)Bj6.46E+04炉膛热力计算（带前屏过热器）序号名称符号单位计算公式和数据来源符号1热空气温度trkc给定trk2理论热空气焓H0rkkj/kg查焓温表3-3H0rk3炉膛漏风系数l由空气平衡表3-1知l4

4、制粉系统漏风系数 zf选用zf5冷空气温度tlkc给定tlk6理论冷空气焓H0lkkj/kg查焓温表3-3H0lk7空其预热器出口过量空气系数kyl-(l+zf)ky8空气带入炉内热量Qkkj/kg_ky*H0rk+(l+zf)*H0lkQk91Kg燃料带入炉内热量Qlkj/kgQr(100-q3-q4-q6)/(100-q4)+QkQl10理论燃烧温度ac根据Ql查焓温表3-3a11炉膛出口烟温lc假定l12炉膛出口烟焓Hlkj/kg查焓温表3-3Hl13烟气的平均热容量Vcpjkj/(kg.c)(Ql-H_l)/(a-_l)Vcpj14水蒸气的容积份额rh2o查烟气特性表3-2rh2o15

5、三原子气体容积份额rn查烟气特性表3-2rn16三原子气体分压力pnMpaprn(p炉膛压力,p=0.098MPa)pn17Pn与S的乘积spnm.Mpaspnspn18三原子气体辐射减弱系数ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+_l)/1000)ky19灰粒子辐射减弱系数kh1/(m.Mpa) 55900/(273+_l)2*132)(1/3)kh20焦炭粒子辐射减弱系数kj1/(m.Mpa) 取用kj21无因次量x1按参考文献1选区x122无因次量x2按参考文献1选区x223半发光火焰辐射减弱系数k1/(m.

6、Mpa) ky*rn+kh*h,l+kj*_x1*_x2k24乘积kpsp*k*skps25炉膛火焰有效黑度hy1-EXP(-kps)hy26乘积szypnm.MPaszypnszypn27自由容积内三原子气体辐射减弱系数ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*szypn)0.5-0.1)*(1-0.37*(273+_l)/1000)ky28乘积kpszy(k_y*rn+kh*h,l+kj*_x1*_x2)*0.098*6.47kpszy29自由容积的火焰有效黑度zy1-EXP(-kpszy)zy30乘积spqpnm.MPapn*spnspqpn31屏间容积内的三原

7、子气体辐射减弱系数ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spqpn)0.5-0.1)*(1-0.37*(273+_l)/1000)kyy32乘积kpspq(k_y*rn+kh*h,l+kj*_x1*_x2)*0.098*1.45kpspq33屏间容积的火焰有效黑度pr1-EXP(-kpspq)pr34屏宽A与SZY比值A/szyA/Szy(A=2.424m)A/szy35屏宽A与屏节距之比wA/SLw36屏的修正系数cp查附录三图V(b)cp37屏区的修正系数cpq查附录三图V(b)cpq38系数a查附录三图V(a)a39屏的辐射系数p查附录三图V(c)p40屏区

8、的辐射系数pq查附录三图V(d)pq41屏的黑度ppr+p*cp*zyp42屏区的黑度pqpr+pq*cpq*zypq43屏的暴光不均匀系数zpp/zyzp44屏区水冷壁的暴光不均匀系数zpqpq/zyzpq45计及暴光不均匀的屏的面积Aqpm2AQ P*zp*XAqp46计及暴光不均云的屏区面积Apqm2APQ*zpq*XApq47炉墙总面积Alqm2A_qp+A_pq+AzyAlq48前后侧墙水冷壁的玷污系数查附录二表49屏的玷污系数p查附录二表p50炉顶包覆管玷污系数ld查附录二表ld51炉膛出口屏的玷污系数ch*(=0.98)ch52前后侧墙水冷壁的热有效系数*x53炉顶包覆管的热有效

9、系数ldld*Xldld54屏的热有效系数pp*Xqpp55炉膛出口处的屏的热有效系数chch*Xchch56平均热有效系数pj(*(Aq+Ah+2*(Ac-0.5*Ar-0.5*Apq.c)+ld*(Ald-Apq.ld)+p*Aqp+*Apq.c*zpq+ld*Apq.ld*zpq)/Alqpj57炉膛黑度lky/(hy+(1-hy)*pjl58与炉内最高温度位置有关的系数MB-C*xl(B=0.56,C=0.5)M*59 炉膛出口烟温lc(a+273)/(M*(3.6*pj*Alq*l*(273+1911)3/(0.996*Bj*Vcpj)0.6)+1)-273l*60 炉膛出口烟焓 H

10、lkj/kg查焓温表3-3Hl61炉膛吸热量Qflkj/kg*(Ql-H_l)Qffll62炉膛容积热强度qvW/m2B*Qr/(3.6*Vl)qv63炉膛截面热强度qfW/m2B*Qr/(3.6*Al)qf64炉内平均辐射热强度qlpjW/m2Bj*Qfl/(3.6*Alq)qlpj65炉顶辐射吸热分布系数ld查附录三图ld66炉顶辐射热强度qldW/m2ld*qlpjqld67炉顶辐射受热面积Aldm2(Ald-Apq.ld)*Xld+Apq.ld*1*zpqAld68炉顶吸热量QldwA_ld*q_ldQldkj/kg3.6*A_ld*q_ld/Bj69前屏辐射吸热分布系数qp查附录三图

11、qp70前屏辐射热强度qqpW/m2qp*qlpjqqp71前屏吸热量Qqpwq_qp*A_qpQqpkj/kgq_qp*A_qp*3.6/Bj72后屏辐射吸热分布系数hp查附录三图hp73后屏辐射热强度 qhphp*qlpj*qhp74后屏吸热量Qhpwq_hp*AzhQhpkj/kg3.6*q_hp*114.2/Bj75附加过热器总吸热量Qfjkj/kg先假定后校核Qfj76一级减温水量Djw1kj/h先假定后校核Djw177二级减温水量Djw2kj/h先假定后校核Djw2*78 附加过热器焓增量hfjkj/kgQfjBj/(D-Djw1-Djw2)hfj79饱和蒸气焓hbqkj/kg查蒸

12、汽特性表p=15.3MPa,t=345chbq80包覆出口蒸气焓hbfkj/kghbq+hfjhbf81包覆出口蒸气温度tbfc查蒸汽特性表,p=14.7MPatbf*82 前屏焓增量hqpkj/kgQqp*热平衡!Bj/(D-Djw1-Djw2)hqp83前屏出口蒸气焓hqpkj/kgh_bf+hqphqp84前屏出口蒸气温度tqpc查蒸汽特性表,p=14.41MPatqp85炉膛出口烟温校核lc|_l假定值 - 计算值_l|l数值3202364.0921670.050.0620144.87472891.092592.79668222458.79668224591912.6525441200

13、121313368.7522612.755226230.0912656470.2337059960.0229031880.1522145852.96005511578.09940798100.50.12.7675294461.8025140690.8351161630.1481836243.0061922951.7616164950.8282330210.0332096226.856276470.522657973炉膛热力计算（带前屏过热器）0.4070575730.3746522411.7955555560.950.860.90.160.080.5329489930.4640400050.6

14、434771120.560277112186.625929440.079283141339.7052130.450.350.450.4410.450.43650.34650.4410.3969063890.3962161270.9184025150.4351182.47240313155.38381131559280.2162883.45864286103.737124288.06850.6580787.2445231.84594842572746.42143.38893280.84104401.977519484116.091085.9238170.8299877.8918411406055

15、.25635.70279487987906500500055004000126.3358422597.32723.635842351.9791393171.91867142895.554513377.279046217.52759663序号名称符号单位计算公式或数据来源符号1烟气进屏温度p0C_p=Lp2烟气进屏焓Hpkj/kgHp=HlHp隔板3烟气出屏温度p0C假定p4烟气出屏焓Hpkj/kg查焓温表3-3Hp隔板5烟气平均温度pj0C0.5*(_p+_p)pj6屏区附加受热面对流吸热量Qdpfjkj/kgguQldPFJ=60 Qslbpfj=130Qdpfj7屏的对流吸热量Qdpkj/

16、kg(H_p隔板-H_p隔板)*-QdpfjQdp8屏入口吸收的炉膛辐射热量Qdpkj/kgQhp=QdpQdp9三原子气体辐射减弱系数Ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)Ky10乘积rnKy1/(m.Mpa)rnKyrnKy11灰粒的辐射减弱系数Kh1/(m.Mpa)55900/(pj+273)2*132)(1/3)Kh12飞灰浓度k查烟汽特性表3-2k13乘积khk1/(m.Mpa)khkkhk14烟气流的辐射减弱系数k1/(m.Mpa)khk+rnKyk15乘积kpskpskps16屏区

17、的烟气黑度1-EXP(-kps)17屏进口对出口的角系数psqrt(c/s1)2+1)-c/s1p18修正系数r按煤种选取，根据参考文献1r19屏出口面积Afpm2等于对流过热汽进口面积及图3-8Afp20炉膛及屏间烟气对屏后受热面的辐射热量Qfpkj/kgQdp*(1-)*p/0.98+0.0000000000567*Afp*(pj+273)4*r/Bj/3600)Qfp21屏区吸收炉膛热辐射热量Qfpqkj/kgQdp-Qf_pQfpq22屏区炉顶附加受热面吸收的炉膛辐射热量Qfldpfjkj/kgQfpq*4.23/(4.23+8.62+101.35)Qfldpfj23屏区水冷壁附加受热

18、面吸收的炉膛辐射热量Qfslbpfjkj/kgQfpq*8.62/(4.23+8.62+101.35)Qfslbpfj24屏所吸收的炉膛辐射热Qfpkj/kgQfpq-Qfldpfj-QfslbpfjQfp25屏所吸收的总热量Qpkj/kgQfp+Qd_pQp26# 蒸汽进屏焓hpkj/kg(D-Djw1-Djw2)*h_qp+Djw1*h_qp)/(420-Djw2)hp27蒸汽进屏温度tp0C查蒸汽特性表 P=14.41MPatp28蒸汽出屏焓hpkj/kgh_p+Qp*Bj/(D-Djw2)hhp29蒸汽出屏温度tp0C查蒸汽特性表 P=14MPatp30屏内蒸汽平均温度tpj0C0.5

19、*(t_p+t_p)tpj31屏内蒸汽平均比容vpjm3/kg查蒸汽特性表P=14.21MPa,T=420Cvpj32屏内蒸汽平均流速wm/s(D-Djw1)*vpj/(3600*A)w33壁管对蒸汽的放热系数2w/(m2.c)查附录三图234屏间烟气平均流速wym/sBj*6.3*(pj+273)/(273*3600*88)wy35烟气侧对流放热系数dw/(m2.c)查附录二图d36灰污系数m2.c/w查附录37壁管灰污层温度thb0Ctpj+(+1/2)*Bj*Qp/(3.6*517)thb38辐射放热系数fw/(m2.c)查附录三图f39利用系数查附录三图40烟气对管壁的放热系数1w/(

20、m2.c)*(d*3.14159*38/(2*51.56*0.84)+f)141对流传热系数kw/(m2.c)1/(1+(1+Qfp/Qd_p)*(+1/2)*1)k隔板42较大温差td0C_p-t_ptd43较小温差tx0C_p-t_ptx44平均温差t0C0.5*(td+tx)t隔板45屏对流传热量Qcrpkj/kg3.6*k*t*524/BjQcrp46误差Q%100*(Qd_p-Qcrp)/Qd_pQ隔板47屏区两侧水冷壁水温tbs0C查蒸汽特性表P=15.3MPa下的饱和温度tbs48平均传热量温差t0Cpj-tbstt49屏区两侧水冷壁对流吸热量Qdpckj/kg3.6*k*t*4

21、4/BjQdpc50误差Q%100*(104-Qdpc)/104Qq51屏区炉顶进口气焓hpldkj/kghbq+QLD*Bj/(420000-6000-5000)hpld52屏区炉顶进口汽温tpld0C查蒸汽特性表,p=15.3MPatpld53屏区炉顶蒸汽焓增量hpldkj/kgBj*(Qfldpfj+XguQldPFJ)/(420000-Djw1-Djw2)hpld54屏区炉顶出口汽焓hpldkj/kgh_pld+hpldhpld55屏区炉顶进口汽温tp(ld)0C查蒸汽特性表P=15.3MPatp(ld)56平均传热温差t0Cpj-0.5*(t_pld+t_p_ld)t57屏区炉顶对流

22、吸热量Qp(ld)kj/kg3.6*k*21.6*t/BjQp(ld)58误差Q%(XguQldPFJ-Qp_ld)*100/XguQldPFJQ数值1182.47240313155.383811055105011600.998571118167698635.70279489.6123807252.24647101481.110726290.0201761691.6365036823.8829746960.3219296660.2752508370.1333610650.576.8188.0077439447.695050916.5827501333.7

23、9274377397.3195571755.4872552877.676498372.98876883151.239271442.5933133407.7910410.0178719.92784523518.2721346.54837443845.067141270.007851.5755759113.158119610.85175.26946366.1346532809.4836346612.4066867710.94516061354.7974670.248145487345773.7362017125.485436-2.02067972620.000704349.551193512.12

24、4243382632.124947349.6636215769.128794261.23511702-2.058528361序号 名称符号单位计算公式或数据来源符号1烟气进口温度0C=_p2烟气进口焓Hkj/kgH=H_pH3蒸汽进口焓hkj/kg(D-Djw2)*h_p+Djw2*hbq)/Dh隔板4蒸汽进口温度t0C查蒸汽特性表P=14.01MPat5蒸汽出口温度t0C已知t隔板6蒸汽进口焓hkj/kg查蒸汽特性表p=13.82MPa,t=540ch隔板7过热器吸热量Qsrkj/kgD*(h_-h_)/BjQsr8炉顶附加受热面吸热量Qldfjkj/kg假定Qldfj9水冷壁附加受热面吸热

25、量Qsldfjkj/kg假定Qsldfj10炉膛及后屏、对过热气辐射热量Qfpkj/kg由后屏热力计算得Qfp11炉顶吸收辐射热量Qfldfjkj/kgQfp*19.9/(19.9+58.1+1020)Qfldfj12水冷壁吸收辐射热量Qfslbfjkj/kgQfp*58.1/(19.9+58.1+1020)Qfslbfj13过热器吸收辐射热量Qfgrkj/kgQfp-Qfldfj-QfslbfjQfgr14过热器对流吸热Qdsrkj/kgQsr-QfgrQdsr15烟气出口焓Hkj/kgH-(Qdsr+Qldfj+Qsldfj)/+0.05*129.6HH16烟气出口温度0C查焓温表3-3隔

26、板17烟气平均温度pj0C0.5*(_+)pj18蒸汽平均温度tpj0C(t+t)/2tpj19烟气流速wym/s!Bj*Vy*(pj+273)/(273*3600*44.1)wy20烟气侧对流放热系数dw/(m2.c)查附录三图d21蒸汽平均比容pjm3/kg查蒸汽特性表,P=14.01,T=493.Cpj22蒸汽平均流速wm/sD*pj/(3600*0.179)w23灰污系数m2.c/w查附录三图24蒸汽侧放热系数2w/(m2.c)查附录三图225管壁灰污层温度thb0Ctpj+(+1/2)*Bj*Qsr/(3.6*1020)thb26乘积spnm.MPAs*p*rnspn27三原子气体的

27、辐射减弱系数ky1/(m.MPA)10*(0.78+1.6*0.0829)/(10*0.864*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)ky28乘积rnky1/(m.MPA)ky*rnrnky29灰粒的辐射减弱系数kh1/(m.MPA)55900/(273+pj)2*132)(1/3)kh30乘积hkh1/(m.MPA)hkhhkh31气流辐射减弱系数k1/(m.MPA)hkh+rnkyk32乘积kpskpskps33烟气黑度1-EXP(-kps)34烟气侧辐射放热系数fw/(m2.c)查附录三图f35利用系数查附录三图36烟气侧放热系数1w/(m2.c)(f+d

28、)*137热有效系数查附录三图38传热系数kw/(m2.c)*1*2/(1+2)k隔板39较小温差tx0C_-ttx40较大温差td0C-ttd41平均温差t0C(td-tx)/(2.3*LOG10(td/tx)t42对流传热量QdSLBkj/kg3.6*k*t*1020/BjQcrgz43误差Q%(Qdsr-Qcrgz)/Qdsr*100Q44两侧水冷壁工质温度tbs0C查蒸汽特性表tbs45平均传热温差t0Cpj-tbst隔板46两侧水冷壁对流吸热量Qdslbkj/kg3.6*k*t*58.1/BjQdslb47误差Q%(Qsldfj-Qdslb)/Qsldfj*100Q隔板48炉顶过热器

29、进口汽焓hgrkj/kgh_pldhgr49炉顶过热器进口汽温tgr0Ct_p_ldtgr50炉顶过热器蒸汽焓增量hgrkj/kgQldfj*Bj/(D-Djw1-Djw2)hgr51炉顶过热器出口汽焓hgrkj/kgh_gr+hgrhgr52炉顶过热器出口汽温tgr0C查蒸汽特性表,P=15.3MPatgr53平均温差0Cpj-(t_gr+t_gr)/254炉顶过热器对流吸热量Qdldkj/kg3.6*k*t*19.9/BjQdld55误差 Q%(Qldfj-Qdld)/Qldfj*100Q数值105511600.998573123.283043433.57517554034342020.3

30、675994848140140188.00774393.4074263259.948315048174.65200261845.7155979565.59544857.8589365956.4294683486.787587513.2556459882.948356330.0221614.443202980.00432673.013029652.90320730.00371114725.592255985.87363103688.100930231.7442559297.6178869660.1231812320.1158965830.195186531113.14354290.6499999

31、7670.5567668317.8589365621.424825453.31711271818.2751661.486709607345611.4294683139.69466480.2180966062620.000704349.66362157.599148392627.599852349.6216603606.786827347.847225960.31827924序号 名称符号单位计算公式或数据来源符号1后墙引出管对流吸热量Qdhykj/kg估计Qdhy2对流过热器出口烟焓Hgrkj/kg由对流过热器热力计算得Hgr3烟气进口焓Hkj/kgH_gr-Qdhy/0.996H4烟气进口温

32、度0C查焓温表3-35烟气出口温度0C假定隔板6烟气出口焓Hkj/kg查焓温表3-3H隔板7省煤气附加对流吸热量Qsmfzkj/kg假定Qsmfz8炉顶及包覆过热器附加对流吸热量Qld+bffjkj/kg假定Qld+bffj9高温再热气对流吸热量Qdgzrkj/kg*(H-H_隔板+0.03*热平衡!$G$7)-Qsmfz-Qld_bffjQdgzr10蒸汽焓增量hgzrkj/kgQdgzr*Bj/Dhgzr11出口汽温t0C已知t12出口汽焓hkj/kg查蒸汽特性表P=2.45MPahh13进口气焓hkj/kgh_h-hgzr1h14进口气温t0C查蒸汽特性表p=2.6MPat隔板15蒸汽平

33、均温度tpj0C(t+t)/2tpj16蒸汽平均比容pjm3/kg查蒸汽特性表p=2.53MPaT=507.5Cpj17蒸汽流速wm/sD*pj/(3600*0.39)w18蒸汽侧对流放热系数2w/(m2.c)查附录三图219灰污系数m2.c/w查附录三图20灰污管壁温度thb0Ctpj+(+1/2)*Bj*Qdgzr/(3.6*973.8)thb21烟气平均温度pj0C(+)/2pj22烟气流速wym/sBj*6.6153*(pj+273)/(3600*273*41.6)wy23烟气侧对流放热系数dw/(m2.c)查附录三图d24乘积spnm.Mpap*s*rnspn25三原子气体的辐射减弱

34、系数ky1/(m.Mpa)10*(0.78+1.6*0.0809)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)ky26乘积rnky1/(m.Mpa)ky*rnrnky27灰粒子的辐射减弱系数kh1/(m.Mpa)55900/(273+pj)2*132)(1/3)kh28乘积khh1/(m.Mpa)kh*hkhh29气体辐射减弱系数k1/(m.Mpa)khh+rnkyk30乘积kpsk*0.098*0.1145kps31烟漆黑度1-EXP(-kps)32烟气侧辐射放热系数fw/(m2.c)查附录三图f33利用系数查附录三图34烟气侧放热系数1w/(m2.c)*

35、(f+d)135热有效系数查附录二表36传热系数kw/(m2.c)*1*2/(2+1)k隔板37较大温差td0C-ttd38较小温差tx0C-ttx39平均温差t0C(td-tx)/(2.3*LOG10(td/tx)t40对流传热量Qcrgzrkj/kg3.6*k*t*973.8/BjQcrgzr41误差Q%(Qdgzr-Qcrgzr)/Qdgzr*100Q42省煤器工质平均温度tsmpj0C(tbs+tgs)/2tsmpj43省煤器附加对流吸热量Qsmdfjkj/kg3.6*k*33.6*(pj-tsmpj)/BjQsmdfj44误差Q%(Qsmfz-Qsmdfj)/Qsmfz*100Q隔板

36、45炉顶及报覆过热器工质平均温度tld+bfpj0C(tbs+t_gr)/2tld+bfpj46炉顶及抱覆过热器附加对流吸热量Qld+bffjdkj/kg3.6*k*77*(pj-tld_bfpj)/BjQld+bffjd47误差Q%(Qld_bffj-Qld_bffjd)/Qld_bffj*100Q数值50489565.595449515.394637842.23276897527538450.1326955556115115895.33165.23377415403549.7353384.501226466.2697497503.13487490.139234.70085471085.82

37、69060.0043589.2629459797.116384512.6084132480.95107670.00250360734.52433847.70300101796.641181461.8576847569.5606857730.1072804550.10172628818.945314450.9594.90157160.64999997656.7279783375.9630192212286.5177406882.13944931.47323397129053.871972332.050959405348.4895696109.21741915.028331234序号名称符号单位计

38、算公式或数据来源符号 （一）第一转向室1进口烟温0C由高温再热器热力计算知2进口烟焓Hlkj/kg由高温再热器热力计算知Hl3包覆过热器附加吸热量Qfjbfkj/kg假定Qfjbf4省煤器吸热量Qfjsmkj/kg假定Qfjsm5出口烟焓Hlkj/kgH_l-(Qfjbf+Qfjsm)/Hl6出口烟温0C查焓温表3-3隔板7省煤器内工质平均温度tpjsm0C(tbs+tgs)/2tpjsm8省煤器灰污管壁温度tkbsm0Ctpjsm+60tkbsm9包覆过热器灰污系数m2.c/w查附录三图10包覆过热器内工质平均温度tpjbf0C(tbs+t_bf)/2tpjbf11包覆过热器灰污管壁温度tk

39、bbf0Ctpjbf+*Bj*Qfjbf/(3.6*49.7)tkbbf12平均烟温pj0C(+)/2pj13乘积spnm.Mpaspnspn14三原子气体辐射减弱系数Ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)Ky15乘积rnKy1/(m.Mpa)rnKyrnKy16灰粒子辐射减弱系数kh1/(m.Mpa)55900/(273+pj)2*132)(1/3)kh17乘积hkh1/(m.Mpa)hkhhkh18气流辐射减弱系数k1/(m.Mpa)rnKy+hkhk19乘积kpskpskps20烟漆黑度1

40、-EXP(-kps)21省煤器辐射放热系数fsmW/(m2.c)查附录三图fsm22包覆过热器辐射放热系数fbfW/(m2.c)查附录三图fbf23省煤气息热量Qfjsmdkj/kgfsm*(pj-tkbsm)*3.6*126.7/BjQfjsmd24误差Q%(Qfjsm-Qfjsmd)/Qfjsm*100Q25包覆过热气息热量 Qfjbfdkj/kgfbf*(pj-tkbbf)*3.6*49.7/BjQfjbfd26误差Q%(Qfjbf-Qfjbfd)/Qfjbf*100Q （二）第二转向室1进口烟温0C由第一转向室热力计算知22进口烟焓H2kj/kg由第一转向室热力计算知2H23隔墙省煤气

41、吸热量Qfjsmkj/kg假定2Qfjsm4包覆过热器吸热量Qfjbfkj/kg假定2Qfjbf5出口烟焓H2kj/kgH_2-(Qfjsm+Qfjbf)/2H26出口烟温0C查焓温表2隔板7平均烟温pj0C(+)/22pj8灰污系数m2.c/w查附录三图29隔墙省煤气平均工质温度tpjsm0C(tgs+tbs)/22tpjsm10包覆过热器内工质平均温度tpjbf0C(tbs+t_bf)/22tpjbf11烟气旁通量份额选取212隔墙省煤器灰污管壁温度tkbsm0Ctpjsm+602tkbsm13包覆过热器灰污管壁温度tkbbf0Ctpjbf+*Bj*Qfjbf/(3.6*(112.6+87

42、)2tkbbf14乘积spnm.Mpaspn2spn15三原子气体辐射减弱系数Ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)2Ky16乘积rnKy1/(m.Mpa)rnKy2rnKy17灰粒子辐射减弱系数kh1/(m.Mpa)55900/(273+pj)2*132)(1/3)2kh18乘积hkh1/(m.Mpa)hkh2hkh19气流辐射减弱系数k1/(m.Mpa)hkh+rnKy2k20乘积kpskps2kps21烟漆黑度1-EXP(-kps)222隔墙省煤器辐射放热系数fsmW/(m2.c)查附录三

43、图2fsm23包覆过热器辐射放热系数fbfW/(m2.c)查附录三图2fbf24隔墙省煤器吸热量Qfjsmdkj/kgfsm*(pj-tkbsm)*3.6*40/(*Bj)2Qfjsmd25误差Q%(Qfjsm-Qfjsmd)/Qfjsm*1002Q26包覆过热器吸热量Qfjbfdkj/kgfbf*(pj-tkbbf)*3.6*(87+112.6)/(*Bj)2Qfjbfd27误差Q%(Qfjbf-Qfjbfd)/Qfjbf*1002Q28隔墙省煤气实际吸热量Qsmsjkj/kg*Qfjsm2Qsmsj29包覆过热器实际吸热量Qbfsjkj/kg*Qfjbf2Qbfsj （三）低温再热器引出管

44、1进口烟温0C由第二转向室热力计算知32进口烟焓Hyckj/kg由第二转向室热力计算知3Hyc3对流吸热量Qdkj/kg假定3Qd4烟气旁通量份额选取35焓增量hkj/kg*Bj*Qd/Dzr3h6出口蒸汽焓hkj/kg由高温再热器热力计算知3h7出口蒸汽温度t0C查蒸汽特性表p=2.453t8蒸汽进口焓hkj/kgh-h3h隔9蒸汽进口温度t0C查蒸汽特性表p=2.453t隔板10平均汽温tpj0C(t+t)/23tpj11蒸汽平均比容pjm3./kg查蒸汽特性表3pj12蒸汽流速wm/s350000*pj/(3600*0.5)3w13蒸汽侧对流放热系数2W/(m2.c)查附录三图3214出

45、口烟焓Hyckj/kgH_yc-Qd/3Hyc15出口烟温0C查焓温表3-33隔板16平均烟温pj0C(+)/23pj17烟气流速wym/s*Bj*vy*(_pj+273)/(273*3600*39.2)3wy18烟气侧对流放热系数dW/(m2.c)查附录三图3d19灰污系数m2.c/w查附录三图320灰污管壁温度tkb0Ctpj+(+1/2)*Bj*Qd/(3.6*518)3tkb21乘积spnm.Mpaspn3spn22三原子气体辐射减弱系数Ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)3Ky23乘

46、积rnKy1/(m.Mpa)rnKy3rnKy24灰粒子辐射减弱系数kh1/(m.Mpa)55900/(273+pj)2*132)(1/3)3kh25乘积hkh1/(m.Mpa)hkh3hkh26气流辐射减弱系数k1/(m.Mpa)hkh+rnKy3k27乘积kpskps3kps28烟气黑度1-EXP(-kps)329烟气侧辐射放热系数fW/(m2.c)查附录三图3f30利用系数查附录三图331烟气侧放热系数1W/(m2.c)*(f+d)3132热有效系数查附录二表333传热系数kW/(m2.c)*1*2/(2+1)3k隔板34较大温差Td0C-t3Td35较小温差Tx0C-t3Tx36平均温

47、差t0C(Td+Tx)/23t37对流传热量QCkj/kg3.6*k*t*518/(*Bj)3QC38误差Q%(Qd-QC)/Qd*1003Q39实际吸热量Qdsjkj/kgQd*3Qdsj （四）第三转向室1进口烟温0C由低温再热器引出管热力计算知42进口烟焓H3kj/kg由低温再热器引出管热力计算知4H33包覆过热器吸热量Qbffjkj/kg假定4Qbffj4烟气旁通量份额等于通过低温再热器引出管的烟气份额45出口烟焓H3kj/kgH_3-_Qbffj/4H36出口烟温0C查焓稳表3-34隔板7平均烟温pj0C(+)/24pj8平均汽温tpj0C(tbs+t_bf)/24tpj9灰污系数m

48、2.c/w查附录三图410灰污管壁温度thbbf0Ctpj+*Bj*Qbffj/(3.6*86.7)4thbbf11乘积spnm.Mpaspn4spn12三原子气体辐射减弱系数Ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)4Ky13乘积rnKy1/(m.Mpa)rnKy4rnKy14灰粒子辐射减弱系数kh1/(m.Mpa)55900/(273+pj)2*132)(1/3)4kh15乘积hkh1/(m.Mpa)hkh4hkh16气流辐射减弱系数k1/(m.Mpa)hkh+rnKy4k17乘积kpskps4

49、kps18烟气黑度1-EXP(-kps)419烟气侧辐射放热系数fW/(m2.c)查附录三图4f20传热量Qbfcfjkj/kg3.6*86.7*f*(pj-thbbf)/(*Bj)4Qbfcfj21误差Q%(Qbffj-Qbfcfj)/Qbffj*1004Q22实际吸热量Qsjbfkj/kgQbffj*4Qsjbf数值7528450.13269570692058174.028277730.45966112903500.0043348.4895696457.1550132741.22983050.0540079417.2275828981.612603774100.15946281.92531

50、49063.537918680.8563885960.57530694568.0989898179.98153017188.13426278.22718890362.9357603510.09177093730.45966118174.02827774733183207780.45398 （一）第一转向室 （二）第二转向室697.6639807714.06182090.0043290348.48956960.72350436.99071380.045043068.0683871221.800202324101.98900081.9604831943.7606855180.7592071920.

51、53196265659.5470551668.1063253567.124578339.291110369291.55827998.31500633553.28228.96697.66398077780.453988958500.1626.427666923384.501226465.41722193358.073559453.4818346 （三）低温再热器引出管459.44952820.136126.46388889777.1200866881.859603622.7860881660.22503441.866994539200.0043487.16089330.00319237233.0

52、62653087.376872725105.87464962.0351750639.4120477880.134667580.12599359915.77337069135.773370690.64999997622.22939843232.2467589169.3042536200.7755062805.31699910.02044703143.2622.78608816881.859603255255 （四）第三转向室0.150.156625.835506601.4904611612.1382746348.48956960.0043382.52742180.0174924514.12300

53、3793.151096229109.67529872.1082330275.2593292560.4123314140.33789519132.22874318238.38683616.51496623338.25序号名称符号单位计算公式或数据来源符号数值1二.三转向室出口烟气混合后焓Hkj/kg(0.15*H3+0.57*H2)/0.72H7539.912二.三转向室出口烟气混合后温度0C查焓温表664.913出口汽焓hkj/kg由低温再热器引出管热力计算知2h3385.324出口汽温t0C由低温再热器引出管热力计算知t453.485进口汽焓hkj/kg已知(按p=2.6MPa,t=330C

54、查蒸汽特性表)hh3080.006进口汽温t0C已知tt355.007焓增量hkj/kgh-hh305.328对流吸热量Qddzrkj/kgDzr*h/(0.72*Bj)Qddzr2297.779包覆过热器.悬吊管过热器附加吸热量Qbffjkj/kg假定Qbffj175.0010出口烟焓Hkj/kgH-(Qddzr+Qbffj)/+H0lk*D:表.xls空气平衡表!$E$4 1H5061.5611出口烟温0C查焓温表458.0412平均烟温pj0C(+)/2pj561.4713平均汽温tpj0C(t+t)/2tpj404.2414蒸汽平均比容pjm3/kg查蒸汽特性表p=2.5MPa,t=3

55、97.5cpj0.1215蒸汽流速wm/sDzr*pj/(3600*0.5)w23.2416蒸汽侧对流放热系数2w/(m2.c)查附录三图2847.0517烟气流速wym/sBj*0.72*Vy*(pj+273)/(3600*273*29.33)wy10.2718烟气侧对流放热系数dw/(m2.c)查附录三图d71.8519乘积spnm.Mpaspnspn0.0020三原子气体辐射减弱系数ky1/(m.Mpa)10*(0.78+1.6*rh2o)/(10*spn)0.5-0.1)*(1-0.37*(273+pj)/1000)ky35.1821乘积rnky1/(m.Mpa) rnkyrnky7.

56、6922灰粒子辐射减弱系数kh1/(m.Mpa)55900/(273+pj)2*13*13)(1/3)kh114.0723乘积hkh1/(m.Mpa) hkhhkh2.1524气流辐射减弱系数k1/(m.Mpa) hkh+rnkyk9.8325乘积kpskpskps0.1426烟气黑度1-EXP(-kps)0.1327灰污系数m2.c/w查附录三图0.0028灰污管壁温度tkb0Ctpj+(+1/2)*0.72*Bj*Qddzr/(3.6*4800)tkb438.1329烟气辐射放热系数fw/(m2.c)查附录三图f12.4430利用系数查附录三图0.8131烟气侧放热系数 1w/(m2.c)

57、*(f+d)168.2832热有效系数查附录二表0.6533传热系数kw/(m2.c)*1*2/(2+1)kk41.0734较大温差tD0C-ttD211.4335较小温差tx0C-ttx103.0436平均温差t0C(tD-tx)/(2.3*LOG10(tD/tx)t150.9737对流传热量Qcdzrkj/kg3.6*k*t*4800/(0.72*Bj)Qcdzr2303.6438误差Q%(Qddzr-Qcdzr)/Qddzr*100Q-0.2639实际吸热量Qsjdzrkj/kg0.72*QddzrQsjdzr1654.3940包覆过热器.悬吊管过热器工质平均温度tbfpj0C(t_bf

58、+tbs)/2tbfpj348.4941包覆过热器.悬吊管过热器吸热量Qbfcfjkj/kg3.6*k*(pj-tbfpj)*233.72/(0.72*Bj)Qbfcfj158.2542误差Q%(Qbffj-Qbfcfj)/Qbffj*100Q9.5743实际附加吸热量Qbfsjfjkj/kg0.72*QbffjQbfsjfj126.003651740.81序号名称符号单位计算公式或数据来源符号1进口烟温0C等于第一转向室出口烟温2进口烟焓Hkj/kg等于第一转向室出口烟焓H3炉膛吸热量Qflkj/kg由炉膛热力计算知Qfl4附加过热器对流吸热量Qgrfjkj/kgXguQldPFJ+43+Q

59、ld_bffj+Qfjbf+_2Qbfsj+_4Qsjbf+QbfsjfjQgrfj5后屏对流吸热量Qdhpkj/kg由后屏过热器热力计算知Qdhp6对流过热器吸量Qddlgrkj/kg由对流过热器热力计算知Qddlgr7附加水冷壁。省煤器吸热量Qslb+smfjkj/kgXQslbpfj+Qsldfj+Qsmfz+QdhyQslb+smfj8上述热量总和Qkj/kgQ_fl+Qgrfj+Qdhp+Qddlgr+Qslb_smfjQ9旁路省煤器出口水焓hpsmkj/kg(_2h*Dgr-Bj*Q-(Djw1-Djw2)*hbq)/(Dgr-Djw1-Djw2)hpsm10旁路省煤器出口水温tp

60、sm0C查水性质表p=15.7MPatpsm11旁路省煤器焓增量hkj/kg假定h12旁路省煤器出口水焓hpsmkj/kgh_psm-hhpsm13旁路省煤器进口水温tpsm0C查水性质表p=15.8mpatpsm14烟气旁通量份额除去进入第二转向室的烟气量15旁路省煤器对流吸热量Qdpsmkj/kg(Dgr-Djw1-Djw2)*h/(*Bj)Qdpsm16旁路省煤器附加受热面吸热量Qfjpsmkj/kg假定Qfjpsm17旁路省煤器出口烟焓Hkj/kgH-(Qdpsm+Qfjpsm)/+表.xls空气平衡表!$E$4*H0lkHP18旁路省煤器出口烟温0C查焓温表3-3P19工质平均温度t