电厂电除尘器的改造

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1、电厂电除尘器的改造电力行业电除尘器现状76%排放浓度240mg/m3以上电耗高13%排放浓度150~200mg/m310%排放浓度100mg/m3以下50mg/m3的排放标准改造:降低电耗&提高除尘效率电除尘器的基本原理绝缘子气体CourtesyoflodgeSturtevant出口22122灰尘荷电q0d1Ep电晕线212dd高压电源1EqEEapad灰尘迁移收尘板A1exp()1exp(

2、EE)paQ气体振打收集入口灰出口峰值电压乘平均电压决定除尘效率电除尘效率-电压平方2log(1)log(1)CaVgV:电压a:直径C::whenV=VcgC.Paulson,“Precipitatorsizingmethods”,inAppliedElectrostaticPrecipitation,editedbyK.R.Parker,1997电压乘积与除尘效率三菱重工峰值电压乘平均电压决定除尘效率N.TachibanaandY.Matsumoto,Intermittentenergiz

3、ationonelectrostaticprecipitators,Jofelectrostatics,25(1990)55-73单相除尘电源-电路常规供电方式间歇&脉冲三相电源–ZH2005LRZZShTZLZH2005三相:恒流,恒压单，三相比较VpIpVsIsPaPrPtPfactor(V)(A)(kV)(mA)(kW)(kVA)(kVA)(kW)(Cosφ)Tri376.525.15820013.88.516.211.60.851Sin375.678.35620018.123.129.411.20.615

4、Tri376.138.66030022.012.625.018.00.880Sin374112.15830027.731.441.917.40.661Tri376.351.36240030.016.133.224.80.903Sin373.8120.76040030.732.945.124.00.680Tri376.164.26450038.319.641.732.00.918Sin372.2176.16150048.344.065.430.50.738Tri375.588.86560053.226.857.63

5、9.00.923Sin371.1206.96260059.048.976.737.20.769Tri374.9112.56670068.033.473.046.20.931Sin369.9237.46370069.553.587.844.10.791Tri373.9132.86780080.538.785.753.60.939Sin368.5268.66480081.256.498.951.20.821平均电压(kV)68●单66▲三64626058565402004006008001000电流(mA)功率因素1

6、0,90,80,7●单0,6▲三0,502004006008001000电流(mA)输入功率(kVA)100●单80▲三60402000102030405060输出功率(kW)三相电源电除尘器-伏安特性,输出功率三相三相单相单相ReproducedfromDemonstrationofthreephasepowersupplyforelectrostaticprecipitators,byPhilllipD.BoyleandGiovanniParadiso,ZeroEmissionsTechnologiesInc

7、.三相电源电除尘器–电压乘积单相三相ReproducedfromDemonstrationofthreephasepowersupplyforelectrostaticprecipitators,byPhilllipD.BoyleandGiovanniParadiso,ZeroEmissionsTechnologiesInc.三相电源电除尘器–浊度单相三相单相三相ReproducedfromDemonstrationofthreephasepowersupplyforelectrostaticprecipitat

8、ors,byPhilllipD.BoyleandGiovanniParadiso,ZeroEmissionsTechnologiesInc.实例6:三相电源与单相电源的比较ZH2005-浙江萧山电厂-125MW;三电场一次一次二次二次有功无功视在输出直功率因数110kW电压电流电压电流功率功率功率流功率节电(Cosφ)125MW(V)(A)(kV)(mA)220kW(KW