風機阻力熱力計算

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,,,,,,,

序號,名稱,符號,單位,公式或來源,設(shè)計煤種,設(shè)計煤種

,,,,,,,

,當?shù)卮髿鈮?P,kPa,,102.10,102.10

,標準大氣壓,P0,kPa,,102.100,102.100

一,鍋爐本體阻力,,,,,

,鍋爐本體阻力（包括自生通風、空預器本體煙氣阻力）,△H1,mmH2O,鍋爐廠提供,261.04,261.04

,,,,,,,

二,空預器出口至除塵脫硫島進口,,,,,

,空預器出口煙氣量,V,m3/s,燃燒計算書得,354.10,367.28

,空預器出口煙氣密度,γ,kg/m3,燃燒計算書得,0.8612,0.8569

,除塵脫硫島進口煙氣量,V,m3/s,燃燒計算書得,360.03,373.28

,除塵脫硫島進口煙氣密度,γ,kg/m3,燃燒計算書得,0.8673,0.8630

1,漸縮大小頭10258×1800×5/5000×3000×5L=5000,,,,,

,,a1,m,,1.8,1.8

,,b1,m,,10.258,10.258

,,a2,m,,3,3

,,b2,m,,5,5

,,L,m,,5,5

,,θ,,θ＝(artg((b1-b2)/2/L))×2,55.47,55.47

,,ξ,,制粉計算規(guī)定(P137表),0.1,0.1

,,w,m/s,流速計算書得,11.87,12.82

,,hd,mmH2O,hd=w2×γ/(2×g),6.18,7.23

,,△h1,mmH2O,△h1=ξ×hd,0.62,0.72

2,90°彎頭3000×5000×5R=3000,,,,,

,,a,m,,5,5

,,b,m,,3,3

,,R,m,,3,3

,,R/b,,,1.00,1.00

,,K△ξ0,,制粉計算規(guī)定(P113圖),0.28,0.28

,,a/b,,,1.667,1.667

,,Kc,,制粉計算規(guī)定(P111圖2),0.88,0.88

,,Kθ,,制粉計算規(guī)定(P111圖1),1,1

,,ξ,,ξ=K△ξ0×Kθ×Kc（P110）,0.2464,0.2464

,,w,m/s,流速計算書得,9.65,10.01

,,hd,mmH2O,hd=w2×γ/(2×g),4.09,4.38

,,△h2,mmH2O,△h2=ξ×hd,1.01,1.08

3,摩擦阻力3000×5000×5L=20000,,,,,

,,a,m,,5,5

,,b,m,,3,3

,,L,m,,20,20

,,d0,m,d0=2ab/(a+b),3.75,3.75

,,λ,,燃燒及制粉系統(tǒng)計算手冊之六,0.02,0.02

,,w,m/s,流速計算書得,12.36,12.82

,,hd,mmH2O,hd=w2×γ/(2×g),6.71,7.18

,,△h3,mmH2O,△h3=λ×L×hd/d0,0.72,0.77

4,分流聯(lián)箱3000×5000×5/2×(2800×2600×5),,,,,

,,a1,m,,3,3

,,b1,m,,5,5

,,a2,m,,2.8,2.8

,,b2,m,,2.6,2.6

,,n1,,,1,1

,,n2,,,2,2

,,F1/F2,,F1/F2=(n1×a1×b1)/(n2×a2×b2),1.03,1.03

,,ξ,,ξ=1.1+0.7×(F1/F2)2（P124）,1.84,1.84

,,w,m/s,流速計算書得,12.36,12.82

,,hd,mmH2O,hd=w2×γ/(2×g),6.75,7.23

,,△h4,mmH2O,△h4=ξ×hd,12.45,13.32

5,90°彎頭2800×2600×5R=3000,,,,,

,,a,m,,2.8,2.8

,,b,m,,2.6,2.6

,,R,m,,2.6,2.6

,,R/b,,,1.00,1.00

,,K△ξ0,,制粉計算規(guī)定(P113圖),0.28,0.28

,,a/b,,,1.077,1.077

,,Kc,,制粉計算規(guī)定(P111圖2),0.99,0.99

,,Kθ,,制粉計算規(guī)定(P111圖1),1,1

,,ξ,,ξ=K△ξ0×Kθ×Kc（P110）,0.2772,0.2772

,,w,m/s,流速計算書得,11.51,11.93

,,hd,mmH2O,hd=w2×γ/(2×g),5.86,6.26

,,△h5,mmH2O,△h5=ξ×hd,1.62,1.74

6,摩擦阻力2800×2600×5L=5000,,,,,

,,a,m,,2.8,2.8

,,b,m,,2.6,2.6

,,L,m,,5,5

,,d0,m,d0=2ab/(a+b),2.70,2.70

,,λ,,,0.02,0.02

,,w,m/s,流速計算書得,12.09,12.91

,,hd,mmH2O,hd=w2×γ/(2×g),6.46,7.34

,,△h6,mmH2O,△h6=λ×L×hd/d0,0.24,0.27

7,除塵脫硫島進口2800×2600×5,,,,,

,,ξ,,制粉計算規(guī)定(P143),1.1,1.1

,,w,m/s,流速計算書得,12.46,12.91

,,hd,mmH2O,hd=w2×γ/(2×g),6.86,7.34

,,△h7,mmH2O,△h7=ξ×hd,7.54,8.07

8,總阻力,△H2,mmH2O,△H2=△h1+△h2+……+△h7,24.19,25.97

,,,,,,,

三,除塵脫硫島本體阻力,△H3,mmH2O,設(shè)備廠提供脫硫除塵數(shù)據(jù),357,357

,,,,,,,

四,除塵脫硫島出口至引風機進口,,,,,

,除塵脫硫島出口煙氣量,V,m3/s,燃燒計算書得,332.71,344.95

,除塵脫硫島出口煙氣密度,γ,kg/m3,燃燒計算書得,1.0315,1.0269

,引風機進口煙氣量,V,m3/s,燃燒計算書得,340.97,353.37

,引風機進口煙氣密度,γ,kg/m3,燃燒計算書得,1.0309,1.0264

1,除塵脫硫島出口3600×4500×5,,,,,

,,ξ,,制粉計算規(guī)定(P141表7.3.9),0.50,0.50

,,w,m/s,流速計算書得,10.32,11.93

,,hd,mmH2O,hd=w2×γ/(2×g),5.60,7.45

,,△h1,mmH2O,△h1=ξ×hd,2.80,3.73

2,摩擦阻力3600×4500×5L=8000,,,,,

,,a,m,,3.6,3.6

,,b,m,,4.5,4.5

,,L,m,,8,8

,,d0,m,d0=2ab/(a+b),4.00,4.00

,,λ,,,0.02,0.02

,,w,m/s,流速計算書得,11.51,11.93

,,hd,mmH2O,hd=w2×γ/(2×g),6.97,7.45

,,△h2,mmH2O,△h2=λ×L×hd/d0,0.28,0.30

3,90°直角邊緩轉(zhuǎn)彎頭3600×4500×5,,,,,

,,a,m,,3.6,3.6

,,b,m,,4.5,4.5

,,r,m,,0,0

,,r/b,,,0.00,0.00

,,K△ξ0,,制粉計算規(guī)定(P113圖),0.28,0.28

,,a/b,,,0.800,0.800

,,Kc,,制粉計算規(guī)定(P111圖2),0.9,0.9

,,Kθ,,制粉計算規(guī)定(P111圖1),1,1

,,ξ,,ξ=K△ξ0×Kθ×Kc（P110）,0.2520,0.2520

,,w,m/s,流速計算書得,10.32,10.70

,,hd,mmH2O,hd=w2×γ/(2×g),5.60,5.99

,,△h3,mmH2O,△h3=ξ×hd,1.41,1.51

4,摩擦阻力3600×4500×5L=5000,,,,,

,,a,m,,3.6,3.6

,,b,m,,4.5,4.5

,,L,m,,7,7

,,d0,m,d0=2ab/(a+b),4.00,4.00

,,λ,,,0.02,0.02

,,w,m/s,流速計算書得,10.32,10.70

,,hd,mmH2O,hd=w2×γ/(2×g),5.60,5.99

,,△h4,mmH2O,△h4=λ×L×hd/d0,0.20,0.21

5,漸縮大小頭3600×4500×5/2500×3500×5L=4000,,,,,

,,a1,m,,3.6,3.6

,,b1,m,,4.5,4.5

,,a2,m,,2.5,2.5

,,b2,m,,3.5,3.5

,,L,m,,4,4

,,θ,,θ＝(artg((b1-b2)/2/L))×2,14.25,14.25

,,ξ,,制粉計算規(guī)定(P137表),0.1,0.1

,,w,m/s,流速計算書得,19.62,20.33

,,hd,mmH2O,hd=w2×γ/(2×g),20.22,21.63

,,△h5,mmH2O,△h5=ξ×hd,2.02,2.16

6,風門2500×3500×5,,,,,

,,ξ,,制粉計算規(guī)定(P130),0.10,0.10

,,w,m/s,流速計算書得,19.62,20.33

,,hd,mmH2O,hd=w2×γ/(2×g),20.22,21.63

,,△h6,mmH2O,△h6=ξ×hd,2.02,2.16

8,總阻力,△H4,mmH2O,△H4=△h1+△h2+……+△h6,8.73,10.07

,,,,,,,

五,引風機出口至煙囪進口,,,,,

,引風機出口煙氣量,V,m3/s,燃燒計算書得,340.97,353.37

,引風機出口煙氣密度,γ,kg/m3,燃燒計算書得,1.0309,1.0264

1,漸擴大小頭φ3550/φ4220L=1500,,,,,

,,φ1,m,,3.55,3.55

,,φ2,m,,4.22,4.22

,,L,m,,1.5,1.5

,,θ,,θ＝(artg((φ2-φ1)/2/L))×2,25.18,25.18

,,K,,制粉計算規(guī)定P129,0.55,0.55

,,F1/F2,,F1/F2=(φ1×φ1)/(φ2×φ2),0.71,0.71

,,ξ,,ξ=K×(1-F1/F2)2,0.047,0.047

,,w,m/s,流速計算書得,12.25,12.69

,,hd,mmH2O,hd=w2×γ/(2×g),7.88,8.43

,,△h1,mmH2O,△h1=ξ×hd,0.37,0.40

2,風門φ=4220,,,,,

,,ξ,,制粉計算規(guī)定(P130),0.10,0.10

,,w,m/s,流速計算書得,10.58,10.96

,,hd,mmH2O,hd=w2×γ/(2×g),5.88,6.29

,,△h2,mmH2O,△h2=ξ×hd,0.59,0.63

3,90°彎頭3600×4500×5R=4500,,,,,

,,a,m,,3.6,3.6

,,b,m,,4.5,4.5

,,R,m,,4.5,4.5

,,R/b,,,1,1

,,K△ξ0,,制粉計算規(guī)定(P113圖),0.28,0.28

,,a/b,,,0.800,0.800

,,Kc,,制粉計算規(guī)定(P111圖2),1.09,1.09

,,Kθ,,制粉計算規(guī)定(P111圖1),1,1

,,ξ,,ξ=K△ξ0×Kθ×Kc（P110）,0.3052,0.3052

,,w,m/s,流速計算書得,10.58,10.96

,,hd,mmH2O,hd=w2×γ/(2×g),5.88,6.29

,,△h3,mmH2O,△h3=ξ×hd,1.79,1.92

4,摩擦阻力3600×4500×5L=8000,,,,,

,,a,m,,3.6,3.6

,,b,m,,4.5,4.5

,,L,m,,8,8

,,d0,m,d0=2ab/(a+b),4.00,4.00

,,λ,,燃燒及制粉系統(tǒng)計算手冊之六,0.02,0.02

,,w,m/s,流速計算書得,9.51,9.86

,,hd,mmH2O,hd=w2×γ/(2×g),4.75,5.08

,,△h4,mmH2O,△h4=λ×L×hd/d0,0.19,0.20

5,摩擦阻力6000×6000×5L=80000,,,,,

,,a,m,,6,6

,,b,m,,6,6

,,L,m,,80,80

,,d0,m,d0=2ab/(a+b),6.00,6.00

,,λ,,燃燒及制粉系統(tǒng)計算手冊之六,0.02,0.02

,,w,m/s,流速計算書得,9.51,9.86

,,hd,mmH2O,hd=w2×γ/(2×g),4.75,5.08

,,△h4,mmH2O,△h4=λ×L×hd/d0（P4）,1.27,1.35

6,總阻力,△H5,mmH2O,△H5=△h1+△h2+……+△h5,4.21,4.50

,,,,,,,

六,煙囪阻力,,,,,

,煙氣量(三臺爐),V,m3/s,燃燒計算書得,1198.08,1243.17

,煙氣密度,γ,kg/m3,燃燒計算書得,0.8793,0.8755

,煙囪高度,H,m,,240,240

,煙囪出口直徑,Φ,m,,7,7

,煙囪出口流速(三臺爐),w,m/s,w=V/(Φ2×π/4),31.15,32.32

1,煙囪進口局部阻力,,,,,

,,ξ,,制粉計算規(guī)定(P147表),1.4,1.4

,,w,m/s,流速計算書得,9.51,9.86

,,hd,mmH2O,hd=w2×γ/(2×g),4.05,4.33

,,△h1,mmH2O,△h1=ξ×hd,5.67,6.07

2,煙囪出口局部阻力,,,,,

,,ξ,,制粉計算規(guī)定(P147表),1.1,1.1

,,w,m/s,,31.15,32.32

,,hd,mmH2O,hd=w2×γ/(2×g),43.48,46.61

,,△h2,mmH2O,△h2=ξ×hd,47.83,51.27

3,煙囪摩擦阻力,,,,,

,,L,m,L=H-15,225,225

,,λ,,燃燒及制粉系統(tǒng)計算手冊之六,0.02,0.02

,,w,m/s,,31.15,32.32

,,hd,mmH2O,hd=w2×γ/(2×g),43.48,46.61

,,△h3,mmH2O,△h3=λ×L×hd/Φ,27.95,29.96

4,總阻力,△H6,mmH2O,△H6=△h1+△h2+△h3,81.45,87.30

,,,,,,,

七,燃燒室出口負壓,△H7,mmH2O,,2,2

,,,,,,,

八,煙道總阻力,,,,,

1,煙道總阻力,△H,mmH2O,△H=△H1+△H2+……+△H6,736.51,745.77

,,,,"△H>300mmH2O,壓力修正時考慮其影響",,

2,吸入側(cè)煙道總阻力,△H',mmH2O,△H'=△H1+△H2+……+△H4,650.85,653.96

3,當?shù)卮髿鈮?B,kPa,,102.1,102.1

4,沿煙道的平均有效壓力,P,mmH2O,P=B×1000/9.81-△H'/2,10082.32,10080.77

5,壓力修正后煙道總阻力,△H修,mmH2O,△H修=△H×B/P,760.28,769.96

,,,,,,,

九,自生通風,,,,,

1,燃燒器出口至空預器出口,△h自1,mmH2O,已計入在鍋爐本體阻力中,0,0

2,空預器出口至煙囪出口,,,,,

⑴,空預器出口標高,h1,m,,12.9,12.9

⑵,煙囪出口標高,h2,m,,240,240

⑶,空預器出口煙氣密度,γ1,,燃燒計算書得,0.8612,0.8569

⑷,煙囪出口煙氣密度,γ2,,燃燒計算書得,1.0309,1.0264

⑸,煙氣平均密度,γ,,γ=(γ1+γ2)/2,0.9461,0.9417

⑹,冷風密度（20℃時）,γl,,γl＝1.306×273/(273+20)×P/P0,1.2169,1.2169

⑺,自生通風,△h自2,mmH2O,△h自=(h2-h1)×(γl-γ),61.49,62.50

3,合計,△h自,mmH2O,△h自=△h自1+△h自2,61.49,62.50

,,,,,,,

十,系統(tǒng)計算阻力（氣壓修正后）,,,,,

1,系統(tǒng)計算阻力（氣壓修正后）,△H計,mmH2O,△H計=△H修-△h自+△H7,700.79,709.46

,,,,,,,

十一,引風機選型,,,,,

1,引風機進口介質(zhì)密度,,,,,

⑴,風機進口負壓,P負,mmH2O,P負＝△H'+△H7,652.85,655.96

,,,Pa,P負×9.81,6404.5,6435.0

⑵,修正前引風機進口煙氣密度,γ',kg/m3,燃燒計算書得,1.0309,1.0264

⑶,考慮進口負壓修正后引風機進口煙氣密度,γ,kg/m3,γ=γ'×(B×1000-P負)/(B×1000),0.9663,0.9617

,,,,,,,

2,引風機風量,,,,,

⑴,修正前風機進口風量,V',m3/s,燃燒計算書得,170.48,176.68

⑵,考慮進口負壓修正后風機進口風量,V,m3/s,V=V'×γ'/γ,181.89,188.57

⑶,取20％裕量（規(guī)程規(guī)定裕度不小于10％）,Vxj,m3/s,Vxj=V×1.20,218.27,226.28

⑷,加12℃裕量,t,℃,規(guī)程規(guī)定另加不低于10℃的溫度裕量,12,12

⑸,風量,Vxj',m3/s,Vxj'=Vxj×(273+txj+t)/(273+txj),225.80,234.08

,,,m3/h,,812879,842702

,,,,,,,

3,引風機壓頭,,,,,

⑴,修正后的引風機壓頭,Pxj,mmH2O,Pxj=△H計,700.79,709.46

,,,Pa,Pxj×9.81,6874.8,6959.8

⑵,取30％裕量（規(guī)程規(guī)定裕度不小于20％）,Pxj',Pa,Pxj'=Pxj×1.30,8937.2,9047.8

,,,,,,,

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