抽凝機組原則性熱力系統(tǒng)計算

1.汽輪機型式和技術(shù)數(shù)據(jù),,,,,,,,

型號,,C15-8.83/0.98,,3.鍋爐主要參數(shù),,,,

額定功率(kW),P,15000,,主蒸汽出口壓力（Mpa）,pb,9.8,,

蒸汽初參數(shù),,,,汽包壓力（Mpa）,pd,11.4,,

（1）壓力(Mpa),p0,8.83,,過熱蒸汽溫度（℃）,tb,540,,

（2）溫度（℃）,t0,535,,過熱蒸汽焓(kj/kg),hb,3475,,

（3）焓值（kj/kg）,h0,3475,,鍋爐給水溫度（℃）,tfw,210.1,,

額定抽氣量（t/h）,De,0,,鍋爐給水焓(kj/kg),hfw,903.1,,

額定抽氣壓力（Mpa）,pe,0.98,,,,,,

額定抽氣溫度（℃）,te,296.9,,,,,,

凝結(jié)水回水焓值(kj/kg),hr,237,,,,,,

額定排氣壓力（kpa）,pc,4.6,,,,,,

,,,,,,,,,

2.回熱系統(tǒng)參數(shù),,,,,,,,

項目,回熱抽汽級數(shù),,,,,,,

,一,二,三,四,,,,

加熱器編號,GJ2,GJ1,LHE2,LHE1,,,,

抽汽壓力（Mpa）,2.293,0.98,0.145,0.026,,,,

抽汽溫度（℃）,385.9,296.9,132.9,65.8,,,,

4.計算選用數(shù)據(jù),,,,,,,,

鍋爐排污量,Dbl,0.05Db,0.05,,,,,

熱電廠內(nèi)汽水損失,Dlo,0.03Db,0.03,,,,,

鍋爐出口過熱蒸汽量,Db,Db,,,,,,

對外供熱凝結(jié)水回水率,ψ,0,,,,,,

凝結(jié)水回水溫度,th,80,,,,,,

鍋爐效率,ηb,0.85,,,,,,

汽輪機機械效率,ηm,0.985,,,,,,

發(fā)電機效率,ηg,0.97,,,,,,

換熱器效率,ηh,0.98,,,,,,

熱電廠內(nèi)管道效率,ηp,0.96,,,,,,

軸封用汽量,Dsg,0.01Do,,,,,,

汽輪機進汽量,Do,,,,,,,

5.汽輪機組汽水綜合表,,,,,,,,

項目,各計算點,,,,,,備注,

,1,2,3,4,5,c,,

加熱器編號,GJ2,GJ1,除氧器,LHE2,LHE1,,二級抽汽減壓后用于除氧焓值不變,

抽汽壓力pe(Mpa),2.29,0.98,,0.145,0.026,0.0046,,

抽汽溫度te(℃),385.90,296.90,,132.90,65.80,,,

抽汽焓值he(kJ/kg),3205.60,3044.30,3044.3,2738.50,2519.50,2349.2,,

抽氣壓損△p（%）,8.00,8.00,,8.00,8.00,,,

加熱器處汽壓pj(Mpa),2.11,0.90,,0.13,0.02,,,

pj壓力下飽和水溫tj(℃),215.14,175.39,158,107.14,60.07,,,

pj壓力下飽和水焓hj(kJ/kg),921.10,742.90,667.24,449.24,251.43,,,

抽氣放熱量qe=he-hj(kJ/kg),2284.50,2301.40,2377.06,2289.26,2268.07,,,

加熱器端差δt(℃),5.00,5.00,,5.00,5.00,,,

加熱器出口水溫tw‘=tj-δt(℃),210.14,170.39,,102.14,55.07,,,

加熱器出口水焓hw’(kJ/kg),903.10,727.70,,431.20,246.60,,,

加熱器進口水溫tw(℃),170.39,158.00,,55.07,31.44,31.44,,

加熱器進口水焓hw(kJ/kg),727.70,667.24,,246.60,131.61,131.608,,

給水焓升△hw=hw'-hw(kJ/kg),175.40,60.46,,184.60,114.99,,,

,,,,,,,,,

,,,,,,,,,

6.汽輪機耗氣量近似計算,,,,,,,,

汽輪機功率,汽輪機進氣初焓,汽輪機抽氣焓,汽輪機實際終焓,汽輪機機械效率,發(fā)電機效率,調(diào)整抽氣量,考慮非調(diào)整抽氣回熱用氣量的系數(shù),汽輪機汽耗量估算

,,,,,,,,,

P（kW),ho（kj/kg),he（kj/kg),hc（kj/kg),ηm,ηg,De（kg/h）,αp,D（kg/h)

15000,3475,3044.30,2349.2,0.985,0.97,0,1.15,57732.76944

,,,,,,,,,

,,,,,,,,,

,,,,,,,,,

,,,,,,,,,

,,,,,,,,,

供熱抽氣量,汽輪機汽耗量,供熱抽氣占汽輪機汽耗量份額,,,,,,

De,D,αe,,,,,,

0,57732.76944,0,,,,,,

7.鍋爐排污系統(tǒng)計算,,,,,,,,

汽輪機總汽耗量,D0',1.01D0,鍋爐軸封用汽按0.01D0,,,,,

軸封用汽份額,αsg,0.01,,,,,,

汽輪機總汽耗量份額,α0',1.01,,,,,,

鍋爐蒸發(fā)量,Db,1.04124D0,汽水損失鍋爐蒸發(fā)量的0.03,,,,,

鍋爐蒸發(fā)量份額,αb,1.04124,,,,,,

全廠廠內(nèi)汽水損失份額,α10,0.03124,,,,,,

鍋爐排污量,Dbl,0.05206D0,排污率按0.05,,,,,

鍋爐排污量份額,αbl,0.052062,,,,,,

,,,,,,,,,

鍋爐汽包壓力,飽和水焓,,,,,,,

Pd（Mpa）,hbl（kj/kg),,,,,,,

11.4,1466.2,,,,,,,

排污擴容器,,,,,,,,

擴容壓力,擴容壓力下飽和水焓值,排污擴容器二次蒸汽焓值,,,,,,

Pbl(Mpa),hbl'(Kj/kg),hf(Kj/kg),,,,,,

0.7,697.32,2763.29,,,,,,

,,,,,,,,,

熱平衡式,αblhblηh=αfhf+αbl'hbl',,,,,,,

物質(zhì)平衡式,αbl'=αbl-αf,,二次蒸汽份額,排污水份額,,,,

αbl,hbl,ηh,αf,αbl',,,,

0.052062,1466.2,0.98,0.01864,0.03343,,,,

,,,0,,,,,

,,,,,,,,,

對外供熱凝結(jié)水損失占汽輪機耗氣量的份額,,凝結(jié)水損失份額,凝結(jié)水回水量,,,,,

De,D,αow,αr,,,,,

0,57732.76944,0,0,,,,,

化學補充水量,,,,,,,,

排污水損失量,熱電廠內(nèi)汽水損失量,對外供熱凝結(jié)水損失量,軸封用汽量,化學水補充水量,化學水補充份額,,,

Dbl'=αbl'*D0,D10=αlo*Db=αlo*αb*Do,Dow=αowDo,Dsg=0.01D0,Dma,αma,,,

0.03343,0.032525422,0,0,0.06595,0.06595,,,

,,,,,,,,,

鍋爐給水量,,,,,,,,

鍋爐蒸發(fā)量份額,排污量份額,鍋爐給水份額,,,,,,

αb,αbl,αfw,,,,,,

1.04124,0.052062,1.093302,,,,,,

排污水冷卻器的計算,,,,,,,,

化學補充水溫度,化學補充水焓值,排污水冷卻器端差,冷卻器加熱后的給水溫度,相應焓值,排污水焓值,排污水溫度,故冷卻器出水口溫度,相應焓值

tma（℃）,hma（kj/kg）,℃,,kj/kg,"hbl""(kj/kg)",℃,tma'(℃),hma'(kj/kg)

75,314.025,7,"tbl""-7","hbl""-7*4.1868",460.8059014,87,80,334.94

,,,,,,,,,

熱平衡方程式,,,,,,,按汽機廠給的,

,,,,,,,,,

,,,,,,,,,

整理得,,,,,,,,

,,,,,,,,,

,,,,,,,,,

高壓加熱器,,,,,,,,

,GJ2,GJ1,,,,,,

抽氣份額α1,0.085654955,0.02254055,,,,,,

抽氣放熱量qe,2284.50,2301.40,,,,,,

給水焓升△hw,175.40,60.46,,,,,,

給水份額αfw,1.093302,1.093302,,,,,,

換熱器效率ηh,0.98,0.98,,,,,,

除氧器計算,,,,,,,,

物質(zhì)平衡,αfw=αma+(α1+α2)+αf+(α3+α4+αc+αsg)+αd+αr,,,,,,,

給水份額αfw,1.093302,,,,,,,

給水份額αma,0.06595,0.90052,,,,,,

高加抽氣冷卻水份額α1+α2,0.108195506,,,,,,,

排污二次蒸汽份額αf,0.01864,,,,,,,

低加（含軸封）份額α3+α4+αc+αsg,0.52099-αd,,,,,,,

加熱用蒸汽份額αd,0.0773,,,,,,,

冷卻水回水份額αr,0,,,,,,,

,,,,,,,,,

熱平衡,αfwhd'=(αmahma'+(α1+α2)*h2'+αfhf+(α3+α4+αc+αsg)hw4+αdhd+αrhr)ηh,,,,,,,

給水焓值hd'（kj/kg),667.24,,,,,,,

補水焓值hma'（kj/kg),334.94,,,,,,,

高加冷凝水h2'（kj/kg),742.90,,,,,,,

二次蒸汽焓值hf（kj/kg),2763.29,,,,,,,

低加出水焓值hw4（kj/kg),246.60,,,,,,,

加熱蒸汽焓值hd（kj/kg),3044.30,,,,,,,

凝結(jié)水焓值hr（kj/kg),0,,,,,,,

求得αd,0.0773,,,,,,,

α3+α4+αsg+αc,0.82317,,,,,,,

低壓加熱器組,,,,,,,,

熱平衡式一（包括二級低加）,(α3+α4+αsg+αc)*hc'-αchc-(α3+α4)h4'-αsghsg'=(（α3（h3-h3')+α4(h4-h4')+αsg(h0-hsg'))ηh,,,,,,,

熱平衡式一（不包括二級低加）,"(α3+α4+αsg+αc)*hc""-αchc-(α3+α4)h4'-αsghsg'=(α4(h4-h4')+αsg(h0-hsg'))ηh",,,,,,,

二級低加出水焓值hc',431.20,,,,,,,

"一級低加出水焓值hc""",246.60,,求得α3,0.0664,,,,

冷卻水焓值hc,131.61,,α4,0.0233,,,,

二級低加抽汽焓值h3,2738.50,,αc,0.72349,,,,

二級低加冷凝水焓值h3',449.24,,各份額相加,1.00871,0.87%,,,

一級低加抽汽焓值h4,2519.50,,,,,,,

一級低加冷凝水焓值h4',251.43,,,,,,,

軸封抽氣焓值h0,3405.5,,,,,,,

軸封凝結(jié)水焓值hsg',251.09,,軸封冷凝水溫度取60，對應焓值為251.09kj/kg,,,,,

汽輪機汽耗量及各項汽水流量計算,,,,,,,,

（1）做功不足系數(shù)計算,,,,,,,,

GJ2抽氣系數(shù)Y1,0.7607035,,,,,,,

GJ1抽氣系數(shù)Y2,0.617427607,,,,,,,

LHE2抽氣系數(shù)Y3,0.345798543,,,,,,,

LHE1抽氣系數(shù)Y4,0.151270208,,,,,,,

各級抽氣份額及做功不足系數(shù)乘積,,,,,,,,

α1Y1,0.065158024,,,,,,,

（α2+αd+αe)Y2,0.061672561,,,,,,,

α3Y3,0.022953611,,,,,,,

α4Y4,0.003525612,,,,,,,

(2)汽輪機純凝工況時的汽耗量,,,,,,,,

Dco,50202.40821,,,,,,,

(3)有回熱抽氣汽輪機汽耗量D0,,,,,,,,

D0,59292.53544,,,,,,,

核算汽輪機耗氣量誤差,2.63%,,,,,,,

各項抽汽和汽水流量計算,,,kg/h,,,,,

鍋爐排污αbl,0.052062,鍋爐排污Dbl（kg/h),3086.9,,,,,

排污擴容蒸汽αf,0.01864,排污擴容蒸汽Df（kg/h),1105.0,,,,,

排污水αbl',0.03343,排污水Dbl'（kg/h),1981.9,,,,,

廠內(nèi)汽水損失α10,0.03124,廠內(nèi)汽水損失D10（kg/h),1852.1,,,,,

軸封用汽量αsg,0.01,軸封用汽量Dsg（kg/h),592.9,,,,,

化學補充水量αma,0.06595,化學補充水量Dma（kg/h),3910.4,,,,,

鍋爐給水量αfw,1.093302,鍋爐給水量Dfw（kg/h),64824.6,,,,,

汽輪機總汽耗量α0',1.01,汽輪機總汽耗量D0'（kg/h),59885.5,,,,,

鍋爐蒸發(fā)量αb,1.04124,鍋爐蒸發(fā)量Db（kg/h),61737.8,,,,,

一級抽汽量α1,0.085654955,一級抽汽量D1（kg/h),5078.7,,,,,

二級抽汽量α2+αd+αe,0.0999,二級抽汽量D2（kg/h),5922.5,,,,,

三級抽汽量α3,0.0664,三級抽汽量D3（kg/h),3935.8,,,,,

四級抽汽量α4,0.0233,四級抽汽量D4（kg/h),1381.9,,,,,

凝汽器凝結(jié)水量αc,0.72349,凝汽器凝結(jié)水量Dc（kg/h),42897.4,,,,,

汽輪機功率核算,,