鼓風機選型計算表

項目名稱,單位,符號,公式,工況點,,,,,備注

,,,,夏季高壓A,夏季常壓B,冬季常壓C,冬季高壓D,平均高壓E,

爐容積,m3,,,1350,1350,1350,1350,1350,已知

爐有效容積,m3,Vu,,1350,1350,1350,1350,1350,已知

當?shù)卮髿鈮?MPa,P0,,0.10277,0.10277,0.10019,0.10019,0.10274,已知

當?shù)乜諝鉁囟?℃,,,35,35,6,6,24,已知

相對濕度,%,d,,90,90,78,78,85,已知

熱風爐充風量,m3/min(標),Qf,,300,300,0,0,0,煉鐵提供

冶煉強度,t焦/m3d,i,,1.26,1,0.76,0.96,1.075,煉鐵提供

爐頂壓力(表壓),MPa,Pd,,0.2,0.03,0.03,0.2,0.2,煉鐵提供

料柱損失(表壓),MPa,△P1,,0.15,0.15,0.15,0.15,0.15,煉鐵提供

送風系統(tǒng)管網(wǎng)損失(表壓),MPa,△Pf,,0.03,0.03,0.03,0.03,0.03,煉鐵提供

高爐所需風壓(表壓),MPa,Pc,Pc＝Pd+△P1+△Pf,0.38,0.21,0.21,0.38,0.38,

吸風阻力損失(表壓),MPa,△Px,,0.003,0.003,0.003,0.003,0.003,

風機入口壓力(絕壓),MPa,Pfx,Pfx＝P0-△Px,0.09977,0.09977,0.09719,0.09719,0.09974,

風機出口風壓(絕壓),MPa,Ph,Ph＝P0+Pc,0.48277,0.31277,0.31019,0.48019,0.48274,

壓比(絕對壓力之比),,ε,ε=Ph/Pfx,4.838829307,3.134910294,3.191583496,4.940734643,4.839983958,

噸焦耗風量,m3/t焦(標),q,富氧3％時：2200；不富氧：2600,2400,2400,2400,2400,2400,煉鐵提供

高爐入爐風量,m3/min(標),Qg,Qg=Vu×i×q/1440,2835,2250,1710,2160,2419,

漏風損失,,δ,,0.03,0.03,0.03,0.03,0.03,煉鐵提供

風機出口風量,m3/min(標),Q2,Q2＝Qg×（1+δ）,2920,2318,1761,2225,2491,不充風時

風機出口風量,m3/min(標),Q3,Q3＝Q2+Qf,3220,2618,,,,充風時

風量修正系數(shù)計算,,,,,,,,,

大氣溫度,℃,ta,,35,35,6,6,24,

標準大氣絕對溫度,K,T0,,273,273,273,273,273,

大氣絕對溫度,K,Ta,Ta＝T0+ta,308,308,279,279,297,

標準大氣壓力,MPa,P0,,0.1013232,0.1013232,0.1013232,0.1013232,0.1013232,

實際大氣壓力,MPa,Pa,,0.10277,0.10277,0.10019,0.10019,0.10274,

鼓風機進風系統(tǒng)的阻力,MPa,ΔPX,,0.003,0.003,0.003,0.003,0.003,

鼓風機吸口法蘭處壓力,MPa,PX,,0.09977,0.09977,0.09719,0.09719,0.09974,

空氣相對濕度,%,φ,,90,90,78,78,85,

水蒸汽的飽和壓力,MPa,Pbz,查《空壓站設計手冊》表1-5,0.00573,0.00573,0.000272,0.000272,0.002982,

實際大氣絕對濕度,MPa,Pz,Pz＝Pbz×φ/100,0.005157,0.005157,0.00021216,0.00021216,0.0025347,

氣壓修正系數(shù),,K1,K1=PX/P0,0.984670836,0.984670836,0.959207763,0.959207763,0.984374753,

氣溫修正系數(shù),,K2,K2=T0/Ta,0.886363636,0.886363636,0.978494624,0.978494624,0.919191919,

濕度修正系數(shù),,K3,K3=1－PZ/Pa,0.949819986,0.949819986,0.997882423,0.997882423,0.975328986,

風量修正系數(shù),,K,K=K1×K2×K3,0.82898049,0.82898049,0.936592125,0.936592125,0.882506262,

空氣絕對含濕量,,d,g(水蒸汽)/kg(干空氣),0.001098495,0.001384104,7.49239E-05,5.93148E-05,0.000632833,

風量修正系數(shù),,K,,0.82898049,0.82898049,0.936592125,0.936592125,0.882506262,

鼓風機實際送風量,m3/min,Q,Q=Q3/K,3884.34956,3157.492888,,,,充風時

鼓風機實際送風量,m3/min,Q',,,,1880.541117,2375.420358,2822.996967,不充風時

機后富氧率,,X,,0,0,0,0,0,

機后富氧修正系數(shù),,khz,,1,1,1,1,1,

機前富氧要考慮風量修正，機后富氧不考慮,,,,,,,,,

鼓風機富氧后實際送風量,m3/min,,,3884.34956,3157.492888,1880.541117,2375.420358,2822.996967,

鼓風機機械效率,ηm,%,,0.98,0.98,0.98,0.98,0.98,0.97～0.99

絕熱系數(shù),k,,,1.4,1.4,1.4,1.4,1.4,

絕熱系數(shù),n,,k/(k-1),3.5,3.5,3.5,3.5,3.5,

多變效率,ηn,%,,0.9,0.9,0.9,0.9,0.9,0.85～0.9

多變指數(shù),σ,,σ=n×ηn=k×ηn/(k-1),3.15,3.15,3.15,3.15,3.15,

鼓風機軸功率,Ne,kW,Ne=Pfx×Q×k/(k-1)×(ε(k-1)/k/ηn－1)/6120×ηm,14975.61695,8193.940598,4843.086192,9071.695077,10882.52692,

聯(lián)軸器效率,ηz,%,,0.98,0.98,0.98,0.98,0.98,0.9

變速箱效率,ηb,%,汽動風機沒有變速箱,1,1,1,1,1,0.95～0.97

安全系數(shù),,,,1.1,1.1,1.1,1.1,1.1,

汽輪機功率,Ne,kW,,16809.36597,9197.280263,5436.117154,10182.51488,12215.08124,

汽機耗汽率,,kg/kW,,4.2,4.2,4.2,4.2,4.2,

汽機耗汽量,,t/h,,70.59933707,38.62857711,22.83169205,42.76656251,51.30334119,

,,,,,,,,,,

,,,,,,,,,,

新日鐵法,,,,,,,,,

,,,,A,B,C,D,E,

高爐容積,m3,,,1350,1350,1350,1350,1350,已知

高爐有效容積,m3,Vn,,1350,1350,1350,1350,1350,已知

當?shù)卮髿鈮?MPa,Pa,,0.10277,0.10277,0.10019,0.10019,0.10274,已知

當?shù)乜諝鉁囟?℃,,,35,35,6,6,24,已知

相對濕度,%,,,90,90,78,78,85,已知

熱風爐充風量,Nm3/min,Qf,,300,300,,,,已知

日產(chǎn)鐵量,t/d,P,,3375,7778,5700,6800,2903,已知

爐頂壓力(表),MPa,Pt,,0.2,0.03,0.03,0.2,0.2,已知

料柱損失(表),MPa,△P1,,0.15,0.15,0.15,0.15,0.15,已知

送風系統(tǒng)管網(wǎng)損失(表),MPa,△Pf,,0.035,0.035,0.035,0.035,0.035,已知

風口前鼓風壓力,MPa,Pb,,0.385,0.215,0.215,0.385,0.385,

爐內(nèi)透氣阻力系數(shù),,K,,2.6,2.6,2.6,2.6,2.6,

爐腹煤氣量,Nm3/min,VBG,,9346.739423,6714.577143,6669.233701,9310.804055,9346.322126,

冷風管網(wǎng)損失(表),MPa,,,0,0,0,0,0,

吸風阻力損失(表),MPa,△Px,,,,0.0015,,,已知

高爐所需風壓(表),MPa,Pc,,0.385,0.215,0.215,0.385,0.385,

風機吸入口壓力(絕),MPa,Pfx,,0.10127,0.10127,0.09869,0.09869,0.10124,

風機出口風壓(絕),MPa,Ph,,0.48777,0.31777,0.31519,0.48519,0.48519,

壓比(絕對壓力之比),,ε,,4.816530068,3.137849314,3.193737967,4.916303577,4.792473331,

燃料比,kg/t鐵,FR,,530,530,530,530,520,已知

生鐵耗風量,Nm3/min,qo,,1200,1355.21,1355.21,1355.21,1317.16,

高爐入爐風量,Nm3/min,VB,,2813,7320,5364,6400,2655,

漏風損失,,δ,,,,0.015,,,已知

風機出口風量,Nm3/min,Q2,,2855,7430,5445,6496,2695,

風機風量,Nm3/min,Q3,,3155,7430,5445,6496,2695,

風量修正,,k,,0.82898049,0.82898049,0.936592125,0.936592125,0.882506262,

鼓風機實際送風量,m3/min,,,3806,8963,,,,充風時

,,,,,,5813,6935,3054,不充風時

機前富氧率,,X,,0,0,0,0,0,

機前富氧修正系數(shù),,khz,,1,1,1,1,1,

鼓風機富氧后實際送風量,m3/min,,,3805.50271,8962.595107,0,0,0,

鼓風機機械效率,%,ηm,,0.98,0.98,0.98,0.98,0.98,0.97～0.99

絕熱系數(shù)k,,,,1.4,1.4,1.4,1.4,1.4,

絕熱系數(shù)k/(k-1),,,,3.5,3.5,3.5,3.5,3.5,

多變效率,%,ηn,,0.9,0.9,0.9,0.9,0.9,0.85～0.9

多變指數(shù),,,,0.317460317,0.317460317,0.317460317,0.317460317,0.317460317,

鼓風機軸功率,kW,Ne,,14836.80114,23631.40649,15213.43434,26788.47226,11855.2768,

聯(lián)軸器效率,%,ηz,,0.98,0.98,0.98,0.98,0.98,

變速箱效率,%,