燃烧系统计算

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文档简介

序号,项目,根据,公式及计算,符号,单位,设计煤,校核煤,备注

1,锅炉蒸汽参数,,,,,,,2

,过热蒸汽流量,,☆,Dgr,t/h,480,480,3

,过热蒸汽出口压力,,☆,Pgr,MPa(a),13.73,13.73,4

,过热蒸汽出口温度,,☆,Tgr,℃,540,540,5

,锅筒压力,,☆,Peq,MPa(a),15.2,15.2,6

,给水温度,,☆,Tgs,℃,240,240,7

,给水压力,,☆,Pgs,MPa(a),15.8,15.8,8

,再热蒸汽流量,,☆,Dzr,t/h,431,431,9

,再热蒸汽进口压力,,☆,Pzrj,MPa(a),4.2,4.2,10

,再热蒸汽出口压力,,☆,Pzrc,MPa(a),3.96,3.96,11

,再热蒸汽进口温度,,☆,Tzrj,℃,370,370,12

,再热蒸汽出口温度,,☆,Tzrc,℃,540,540,13

,锅炉效率,,☆,ηg,%,91.35,91.35,14

,机械未燃烧损失,(2)P54,表2-1或锅炉厂资料,q4,%,1.5,1.5,15

,,,,,,,,16

2,燃料特性,,,,,,,17

1),煤,,,,,,,18

,收到基碳份,,☆,Car,%,52.39,48.52,19

,收到基氢份,,☆,Har,%,3.93,3.65,20

,收到基氧份,,☆,Oar,%,4.36,4.39,21

,收到基氮份,,☆,Nar,%,1.5,1.8,22

,收到基硫份,,☆,Sar,%,1.4,1.7,23

,收到基灰份,,☆,Aar,%,29.42,31.94,24

,收到基水份,,☆,Mar,%,7,8,25

,内在水份(空气干燥基水分),,☆,Mad,%,1.18,0.93,26

,,,,,,,,27

,干燥无灰基挥发份,,☆,Vdaf,%,39.47,35,28

,收到基低位发热量,,☆,Qnet,kJ/kg,21318,19646,29

,可磨系数,,,Kvl,,,,30

,哈氏可磨系数,,,HGI,,77,65.16,31

,,,,,,,,32

3,燃料耗量,,,,,,,33

,过热蒸汽焓,,查水蒸汽表,igr,kJ/kg,3435,3435,34

,再热汽入口焓,,查水蒸汽表,izr1,kJ/kg,3136.6,3136.6,35

,再热汽出口焓,,查水蒸汽表,izr2,kJ/kg,3535.1,3535.1,36

,汽包内饱和水焓,,查水蒸汽表,ibs,kJ/kg,1617.8,1617.8,37

,给水焓,,查水蒸汽表,igs,kJ/kg,1039.4,1039.4,38

,锅炉排污率,,按规程取,αpw,,0.02,0.02,39

,锅炉排污量,,αpw*Dgr,Dpw,t/h,9.6,9.6,40

,蒸汽每小时吸热量,,(Dgr(igr-igs)+Dzr(izr2-izr1)+Dpw(ibs-igs))*1000,igDg,kJ/h,1327194140,1327194140,41

,,,,,,,,42

,每公斤煤送入炉内的热量,(2)P41,Qnet+Qr+Qwl+Qwh(后三项为零),Qg,kJ/kg,21318,19646,43

,,,,,,,,44

,锅炉煤消耗量,,igDg*100/(ηgQg),Bg,kg/h,68152.13192,73952.31336,45

,锅炉燃料消耗量(按锅炉厂值),,,Bg,kg/h,,,46

,计算燃料消耗量,(2)P8,Bg*(100-q4)/100,Bj,kg/h,67129.84994,72843.02866,47

,计算燃料消耗量(按锅炉厂值),,,Bj,kg/h,,,48

,,,,,,,,49

4,理论空气量计算,,,,,,,50

,煤燃烧理论空气量,(2)P60,0.0889(Car+0.375Sar)+0.265Har-0.0333Oar,Vo,Nm3/kg,5.6004055,5.19116475,51

,,,,,,,,52

5,燃烧产物体积计算,,,,,,,53

,氮气体积,(2)P60,0.79Vo+0.008Nar,VN2,Nm3/kg,4.436320345,4.115420153,54

,二氧化物体积,,1.866(Car+0.375Sar)/100,VRO2,Nm3/kg,0.9873939,0.91727895,55

,水蒸汽体积,,0.111Har+0.0124Mar+0.0161Vo,VH2O,Nm3/kg,0.613196529,0.587927752,56

,总和,,VN2+VRO2+VH2O,Vyo,Nm3/kg,6.036910774,5.620626855,57

,燃烧产物实际体积,,Vyo+0.0161(α-1)Vo+(α-1)Vo,Vyw,Nm3/kg,,,58

,,,,,,,,59

6,空气和烟气参数,,,,,,,60

,炉膛出口过剩空气系数,,取,αl,,1.25,1.25,61

,锅炉进口空气温度,,锅炉厂资料,Tki,℃,20,20,62

,空气预热器出口热风温度,,☆,Tky,℃,316,316,63

,锅炉排烟温度,,☆,Tpy,℃,133,133,64

,送风机进口空气温度,,☆,Txf,℃,20,20,65

,环境空气温度,,☆,Tlk,℃,20,20,66

,环境大气压,,☆,Pa,kPa,101.62,101.62,67

,锅炉尾部受热面漏风系数,,☆,△αwb,,0.05,0.05,68

,空气预热器漏风系数,,☆,△αky,,0.15,0.15,69

,,,,,,,,70

7,锅炉各处空气量计算,,,,,,,71

,一次风(燃煤)份额,,锅炉厂资料,r1k,,0.28,0.28,72

,锅炉炉膛漏风系数,,锅炉厂资料,△αl,,0.05,0.05,73

,以g1表示的制粉系统漏风系数,(6)P69,查表6.2.1,Kle,,0.3,0.3,74

,以Vo表示的制粉系统漏风系数,(2)P3,Kle*g1/1.285/Vo,△αzf,,0.072240451,0.082621461,75

,以Vo表示的磨煤机入口吸冷风漏风系数,,Rla*g1/1.285/Vo,△αla,,0.036256685,0.040599951,76

,吸风道过剩空气系数,(2)P61,αl-△αl-△αzf+△αky-△αla,αxf,,1.241502864,1.267378539,77

,吸风道空气量,,1.016αxf*Bj*Vo*101.3/Pa*(273+Txf)/273,Vxf,m3/h,507354.8445,520940.4628,78

,送风机进口处过剩空气系数,,αsj=αxf,αsj,,1.24150,1.26738,79

,送风机进出口处空气量,(2)P61,Vsj=Vxf,Vsj,m3/h,507354.8445,520940.4628,80

,空预器进口处过剩空气系数,,α'ky=αsj,α'ky,,1.241502864,1.267378539,81

,空预器进口处空气量,,Vsj(273+Tki)/(273+Txf),V'ky,m3/h,507354.8445,520940.4628,82

,空预器出口处过剩空气系数,,α'ky-△αky,α''ky,,1.091502864,1.117378539,83

,空预器出口处空气量(二分仓),,α''kyBj*Vo*101.3/Pa*(273+Tky)/273,V''ky,m3/h,882557.3414,908732.4468,84

,二次风流量,(2)P61,(α''ky-βzx-Rha*g1/1.285/Vo)BjVo*,V2k,m3/h,731867.0752,714277.8532,85

,,,(273+Tky)/273,,,,,86

,,,,,,,,87

,热风再循环,,,,,,,88

,空气预热器进口允许的进风温度,,锅炉厂资料,t''2,℃,10,10,89

,空气在预热器进口允许的进风温度下的比热,(6)P81,根据t''2查图6.5.1,C''2,kJ/kg.℃,1.011,1.011,90

,吸风道空气温度,,按冬季采暖室外计算温度,t'2,℃,-8,-8,91

,空气在吸风道空气温度下的比热,(6)P81,根据t'2查图6.5.1,C'2,kJ/kg.℃,1.011,1.011,92

,空预器出口的空气比热,(6)P81,根据tky查图6.5.1,Cky,kJ/kg.℃,1.03,1.03,93

,热风再循环空气系数,(2)P46,αxf*(C''2*t''2-C'2*t'2)/(Cky*Tky-C''2*t''2),βzx,,0.071639246,0.073132367,94

,热风再循环空气流量(在Tky下),(2)P61,βzx*Bj*Vo*(273+Tky)/273*101.3/Pa,Vzx,m3/h,57925.40256,59476.49135,95

,考虑热风再循环后送风机进出口风量(换算到Txf状态),,Vzx*(273+Txf)/(273+Tky)+Vsj,V'sj,m3/h,536170.0277,550527.2404,96

,考虑热风再循环后送风机进出口风量(换算到T''2状态),,Vzx*(273+t''2)/(273+Tky)+Vsj*(273+t''2)/(273+Txf),V''sj,m3/h,517870.7094,531737.9148,97

,考虑热风再循环后空预器出口风量,,Vzx+V''ky,V'''ky,m3/h,940482.7439,968208.9382,98

,,,,,,,,99

8,锅炉各处烟气量计算,,,,,,,100

1),空预器出口烟气过剩空气系数,,αl+αky+αwb,αpy,,1.45,1.45,101

,空预器出口每kg煤的烟气量,(2)P61,Vyo+0.0161(αpy-1)Vo+(αpy-1)Vo,Vpy1,Nm3/kg,8.597668186,7.994260981,102

,空预器出口烟气量,,Vpy1*Bj*101.3/Pa*(273+Tpy)/273,Vpy,m3/h,855637.87,863296.456,103

2),空预器出口至除尘器前烟道,,,,,,,104

,长度,,,L1,m,36,36,105

,烟道每10m漏风系数,(2)P2,,△αyd,,0.01,0.01,106

,空预器出口至除尘器前烟道,,,,,,,107

,漏风系数,(2)P2,L1*△αyd/10,△α'yd,,0.036,0.036,108

,除尘器进口处烟气温度,(2)P9,(αpyTpy+△α'yd*Tlk)/(αpy+△α'yd),Tcc,℃,130.2624495,130.2624495,109

,除尘器进口处每kg煤的烟气量,(2)P61,Vpy1+△α'yd*Vo,V'cc,Nm3/kg,8.799282784,8.181142912,110

,除尘器进口处烟气量,,V'cc*Bj*101.3/Pa*(273+Tcc)/273,Vcc,m3/h,869797.8762,877520.6907,111

,,,,,,,,112

3),除尘器至吸风机前烟道,,,,,,,113

,除尘器漏风系数,,双室四电场,△αc,,0.1,0.1,114

,烟道长度,,,L2,m,34,34,115

,除尘器和烟道漏风系数,(2)P9,△αc+△αyd*L2/10,△α''yd,,0.134,0.134,116

,吸风机进口处烟温,,(αpyTpy+(△α'yd+△α''yd)Tlk)/,Txj,℃,121.1419753,121.1419753,117

,,,(αpy+△α'yd+△α''yd),,,,,118

,吸风机进口处每kg煤烟气量,(2)P61,Vpy1+(△α'yd+△α''yd)*Vo,Vxj1,Nm3/kg,9.549737121,8.876758989,119

,吸风机进口处烟气量,,Vxj1*Bj*101.3/Pa*(273+Txj)/273,Vxj,m3/h,922629.613,930599.2961,120

,吸风机出口处烟气量,,Vxc=Vxj,,,922629.613,930599.2961,121

,,,,,,,,122

9,烟风道截面计算,,,,,,,123

1),各处风速推荐值,(3)P3,,,,,,124

,送风机吸风道，出口冷风道1,,下限,Wxf1,m/s,10,10,125

,送风机吸风道，出口冷风道2,,上限,Wxf2,m/s,12,12,126

,二次风道1,,下限,W2k1,m/s,15,15,127

,二次风道2,,上限,W2k2,m/s,25,25,128

,热风管1,,下限,W1k1,m/s,15,15,129

,热风管2,,上限,W1k2,m/s,25,25,130

,热风再循环管道1,,下限,Wzx1,m/s,25,25,131

,热风再循环管道2,,上限,Wzx2,m/s,35,35,132

,空气预热器至烟囱风道1,,下限,Wpy1,m/s,10,10,133

,空气预热器至烟囱风道2,,上限,Wpy2,m/s,15,15,134

2),风道截面选择,,,,,,,135

a,送风机进口风道,,,,,,,136

,风道根数,,,Nxf,根,2,2,137

,计算截面1,,V'sj/Nxf/Wxf1/3600,Fxf1,m2,7.446805941,7.646211672,138

,计算截面2,,V'sj/Nxf/Wxf2/3600,Fxf2,m2,6.205671617,6.37184306,139

,选择截面,,选3000X2000X3,Fs,m2,5.970036,5.970036,140

,送风机进口风道实际流速,,V'sj/Nxf/Fs/3600,Wxf,m/s,12.47363658,12.80764751,141

b,送风机出口至空预器冷风道,,,,,,,142

,风道根数,,,N2k,根,2,2,143

,计算截面1,,V'sj/N2k/Wxf1/3600,Fk1,m2,7.446805941,7.646211672,144

,计算截面2,,V'sj/N2k/Wxf2/3600,Fk2,m2,6.205671617,6.37184306,145

,选择截面,,选3000X2000X3,Fs,m2,5.970036,5.970036,146

,送风机出口至空预器冷风道实际流速,,V'sj/N2k/Fs/3600,Wk,m/s,12.47363658,12.80764751,147

,,,,,,,,148

c,预热器出口风道,,,,,,,149

,风道根数,,,Nrk,根,2,2,150

,计算截面1,,V''ky/Nrk/W1k1/3600,Frkj1,m2,8.171827235,8.414189323,151

,计算截面2,,V''ky/Nrk/W1k2/3600,Frkj2,m2,4.903096341,5.048513594,152

,选择截面,,选2200X3000X3,Frk,m2,6.568836,6.568836,153

,预热器出口风道实际流速,,V''ky/Nrk/Frk/3600,Wrk,m/s,18.66044586,19.21388201,154

d,至炉二次风道,,,,,,,155

,风道根数,,,N2k,根,2,2,156

,计算截面1,,V2k/N2k/W2k1/3600,F2k1,m2,6.776546992,6.613683826,157

,计算截面2,,V2k/N2k/W2k2/3600,F2k2,m2,4.065928195,3.968210296,158

,选择截面,,选2200X2200X3,F2k,m2,4.813636,4.813636,159

,至炉二次风道实际流速,,V2k/N2k/F2k/3600,W2k,m/s,21.11672027,20.60921461,160

,,,,,,,,161

e,热风再循环管道(每炉2根),,,,,,,162

,风道根数,,,Nzx,根,2,2,163

,计算截面1,,Vzx/Nzx/Wzx1/3600,Fzx1,m2,0.321807792,0.330424952,164

,计算截面2,,Vzx/Nzx/Wzx2/3600,Fzx2,m2,0.229862709,0.236017823,165

,热风再循环管道(每炉2根)选择截面,,选φ530×3,Fzx,m2,0.21554216,0.21554216,166

,热风再循环管道实际流速,,Vzx/Nzx/Fzx/3600,Wzx,m/s,37.32538822,38.32486322,167

,,,,,,,,168

3),烟道截面选择,,,,,,,169

a,除尘器前烟道,,,,,,,170

,烟道根数,,,N'pk,根,2,2,171

,计算截面1,,Vcc/N'pk/Wpy1/3600,F'pk1,m2,12.08052606,12.18778737,172

,计算截面2,,Vcc/N'pk/Wpy2/3600,F'pk2,m2,8.053684039,8.125191581,173

,选择截面,,选3000*3200*5,F'pk,m2,9.5381,9.5381,174

,除尘器前烟道实际流速,,Vcc/N'pk/F'pk/3600,W'pk,m/s,12.66554771,12.77800335,175

b,除尘器后烟道,,,,,,,176

,烟道根数,,,N''pk,,2,2,177

,计算截面1,,Vxj/N''pk/Wpy1/3600,F''pk1,m2,12.81430018,12.92499022,178

,计算截面2,,Vxj/N''pk/Wpy2/3600,F''pk2,m2,8.542866787,8.616660149,179

,选择截面,,选3000*3200*5,F''pk,m2,9.5381,9.5381,180

,除尘器后烟道实际流速,,Vxj/N''pk/F''pk/3600,W''py,m/s,13.43485619,13.5509066,181

c,单炉砖烟道,,,,,,,182

,单个引风机接入段,,,,,,,183

,烟道根数,,,N'''pk,,1,1,184

,计算内截面1,,Vxj/2/N'''pk/Wpy1/3600,F'''pk1,m2,12.81430018,12.92499022,185

,计算内截面2,,Vxj/2/N'''pk/Wpy2/3600,F'''pk2,m2,8.542866787,8.616660149,186

,选择内截面,,选3000*4000,F'''pk,m2,12,12,187

,砖烟道实际流速,,Vxj/2/N'''pk/F'''pk/3600,W'''py,m/s,10.67858348,10.77082519,188

,两个引风机接入段,,,,,,,189

,烟道根数,,,N''''pk,,1,1,190

,计算内截面1,,Vxj/N''''pk/Wpy1/3600,F''''pk1,m2,25.62860036,25.84998045,191

,计算内截面2,,Vxj/N''''pk/Wpy2/3600,F''''pk2,m2,17.08573357,17.2333203,192

,选择内截面,,选5500*4000,F''''pk,m2,22,22,193

,砖烟道实际流速,,Vxj/N''''pk/F''''pk/3600,W''''py,m/s,11.6493638,11.74999111,194

,,,,,,,,195

10,烟气酸露点计算,,,,,,,196

1),除尘器进口水蒸汽的酸露点,,,,,,,197

a,除尘器进口烟气中的湿份量,(2)P10,(VH2O+0.0161(αpy-1)Vo)*0.804Bj/3600,G',kg/s,9.801559631,10.17642087,198

,除尘器进口烟气比重,,(1-0.01Aar+1.306αpyVo)*273/Vpy1/(273+Tpy),r'c,kg/m3,0.884642886,0.884111049,199

b,除尘器进口烟气重量流量,,Vpy*r'c/3600,G'y,kg/s,210.2594319,212.0138709,200

c,除尘器进口烟气含湿量,,G'*1000/(G'y-G'),d'',g/kg,48.89585787,50.41889337,201

d,除尘器进口水蒸汽露点温度,(2)P63,由d=d''查表2-10,T水ld,℃,39.05,40.3,202

,,,,,,,,203

2),除尘器进口烟气酸露点温度,(2)P39,,,,,,204

,燃料折算硫分,,1000*Sar/(Qnet/4.186),Ss,g/kcal,0.274903837,0.362221317,205

,燃料折算灰分,,1000*Aar/(Qnet/4.186),As,g/kcal,5.776907777,6.805499338,206

,系数,,由锅炉原理查得,B,,121,121,207

,飞灰份额,,,Afh,,0.9,0.9,208

,除尘器进口烟气酸露点温度,,"T水ld+B*power(Ss,1/3)/power(1.05,Afh*As)",Tld,℃,100.0989,104.2725,209

,,,,,,,,210

11,煤的爆炸性指数,,,,,,,211

,挥发分中的含硫量,,Sar.v=0.7Sar,Sar.v,%,0.98,1.19,212

,煤的收到基挥发分,(6)P187,(100-Mar-Aar)/100*Vdaf,Var,%,25.095026,21.021,213

,煤的挥发分含碳量,(6)P15,Var-(Har+Oar+Sar.v+Nar),Car.v,%,19574.1876,17891.6122,214

,煤中剩余焦碳,(6)P15,Car-Car.v,Car.f,%,0,0,215

,煤的爆炸性指数,(6)P15,100(Var+Sar.v)/(Car.f+Aar+Mar),Bc,,46.6081,42.354,216

,,,,,,,,217

12,燃烧系统计数成果统计表,,,,,,,218

1),烟风参数,,,,,,,219

,燃料消耗量,,,Bg,kg/h,68152.13192,73952.31336,220

,计算燃料消耗量,,,Bj,kg/h,67129.84994,72843.02866,221

,理论空气量,,,Vo,Nm3/h,5.6004055,5.19116475,222

,一次风份额,,,r1k,,0.28,0.28,223

,炉膛出口过剩空气系数,,,αl,,1.25,1.25,224

,送风机进出口空气量,,,Vsj,m3/h,536170.0277,550527.2404,225

,空气预热器漏风系数,,,△αky,,0.15,0.15,226

,空气预热器出口处空气量,,,V''ky,m3/h,940482.7439,968208.9382,227

,二次风(燃煤)流量,,,V2k,m3/h,731867.0752,714277.8532,228

,空气预热器出口烟气量,,,Vpy,m3/h,855637.87,863296.456,229

,除尘器进口烟气温度,,,Tcc,℃,130.2624495,130.2624495,230

,除尘器进口烟气量,,,Vcc,m3/h,869797.8762,877520.6907,231

,吸风机进口烟气量,,,Vxj,m3/h,922629.613,930599.2961,232

2),烟风道截面,,,,,,,233

,送风机进口风道,,选3000X2000X3,FS,m2,5.970036,5.970036,234

,送风机出口至空预器冷风道,,选3000X2000X3,Fs,m2,5.970036,5.970036,235

,空气预热器出口风道,,选2200X3000X3,Frk,m2,12.47363658,12.80764751,236

,至炉二次风道(每炉两根),,选2200X2200X3,F2k,m2,4.813636,4.813636,237

,热风再循环管道(每炉2根)选择截面,,选φ530×3,Fzx,m2,0.21554216,0.21554216,238

,除尘器前烟道,,选3000*3200*5,F'pk,m2,9.5381,9.5381,239

,除尘器后烟道,,选3000*3200*5,F''pk,m2,9.5381,9.5381,240

,单台引风机接入段砖烟道,,选3000*4000,F'''pk,m2,12,12,241

,两台引风机接入段砖烟道,,选5500*4000,F''''pk,m2,22,22,242

3),烟风道流速,,,,,,,243

,送风机进口风道实际流速,,,Wxf,m/s,12.47363658,12.80764751,244

,送风机出口至空预器冷风道实际流速,,,Wk,m/s,12.47363658,12.80764751,245

,预热器出口风道实际流速,,,Wrk,m/s,18.66044586,19.21388201,246

,至炉二次风道实际流速,,,W2k,m/s,21.11672027,20.60921461,247

,热风再循环管道实际流速,,,Wzx,m/s,37.32538822,38.32486322,248

,除尘器前烟道实际流速,,,W'pk,m/s,12.66554771,12.77800335,249

,除尘器后烟道实际流速,,,W''py,m/s,13.43485619,13.5509066,250

4),除尘器进口烟气酸露点温度,,,Tld,℃,100.0989043,104.2724997,251

5),煤的爆炸性指数,,,Bc,,46.6081,42.354,252

6),烟气比重,,,,,,,255

,1kg燃料生成理论烟气的重量,(9)P23,1-Aar/100+(1+d/1000)*1.293*α*Vo,Gyo,kg/kg,7.947124312,7.392776022,256

,炉膛出口1kg燃料生成理论烟气的重量,,,,kg/kg,9.757455389,9.070820027,257

,空予器出口1kg燃料生成理论烟气的重量,,,,kg/kg,11.20572025,10.41325523,258

,除尘器进口1kg燃料生成理论烟气的重量,,,,kg/kg,11.46640793,10.65489357,259

,引风机进口1kg燃料生成理论烟气的重量,,,,kg/kg,12.43674538,11.55432516,260

,炉膛出口烟气比重,,Gyo/V,γyo,kg/m3,0.765530067,0.765375554,263

,空予器出口烟气比重,,,,kg/m3,0.879155009,0.878647241,264

,除尘器进口烟气比重,,,,kg/m3,0.899607498,0.899036145,265

,,,,,,,,266

,,,,,,,,,

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