Diametro da ColunaSCRUBBER DESIGN (Coluna de enchimento)Elaborado por:Column Tag No.:CL2 ScrubberVerificado por:Job No.:Data:Client:Project:135792468Entrada de dadosStream:Tipo de embalagem=Anel PallTamanho da embalagem=50mmPacking MOC=PPGas pr. Drop / m bed=30mmWC / m packing height=294.1995(N/m2)/mAltura total de embalagens=3.54m (including all packed beds)Altura Coluna=6.04Propriedade do GasVazo=8964.59kg/hOR10000.00m3/h=2.4902kg/s=2.7777777778m3/sPresso de entrada do Gas=1.00atmTemperatura de entrada Gas=30.00oC=303.00oKTaxa fluxo ar / gs=70Componente a ser lavadoNome=Cl2Taxa de fluxo do compente=1038.16Kg/h% comp. ar/gas=8.64% (v/v)(presumed) / (given by client) / (by process cal.)Peso molecular do componente=70.906Propriedades da Soluo de lavagemSoluo mdia=20% NaOHTaxa de fluxo de liquido=15600kg/h=13.00m/h=4.3333kg/sDensidade do liquido=1200kg/m3Conversion :Viscosidade do liquido=0.1Ns/m280Cp =0Ns/m2Fator de empacotamento, Fp=203m-1Caracteristicas do fator de empacotamento,Cf=102Ref. Table 6.3, Characterstics of Random packingsFator de converso, J=0.92factor for adequate liquid distribution & irrigation across the bedPara calcular dimetro da colunaUma vez que grandes quantidades de fluxo esto no fundo de um amortecedor, o dimetro sero escolhidospara acomodar as condies de fundoPara calcular a densidade do gasAvg. Peso molecular=70.9Kg / KmolSe a taxa de fluxo de gs de dado por kg/hSe a taxa de fluxo dado em m3/hGas in =0.0351221994Kmol/sGas in= (m3/s) x 273xpr. in atmx 1kmol = mass / mol wtT in kelvin1.0 atm22.4=(kmol/s) x T in kelvin x 1.0 atm x 22.4273 pr. In atm 1=0.111729923Kmol/s=0.873192m3/s=7.9216515402Kg/smass = mol wt x kmolSelecione vol. de taxa de fluxo e taxa de fluxo de massa por cimaSelecionados taxa de fluxo de massa=2.4902Kg/sSelecionados taxa de fluxo de volume=0.873192m3/sSelecionados Vazo molar=0.0351221994Kmol/sPortanto densidade do gas=2.8518Kg/m3(mass flow rate / vol. Flow rate)Para encontrar L', G' e rea da Torre c/sAssumindo a absorso completaComponente removido=0.2150Kg/s(molar flow rate x % comp. x mol. Wt.)Liquido deixando=4.5484Kg/s(Inlet liquid flow rate + comp. Removed)L' G0.5=0.08904G' LUtilizao0.08904as ordinate,Refer fig.6.34 usando uma queda de presso de gas de294.1995(N/m2)/mG' 2 Cf L0.1 J=0.039(from graph)G ( L -- G) gcPortanto, G'=0.039G ( L -- G) gc0.5Cf L0.1 J=1.3515Kg / m2.srea de torre c/s=1.8425m2( c/s area = mass flow rate / G' )Dimetro da Torre=1.5317m=1531.7mm=2000mmArea correspondente c/s=3.1416m2REQUISITO PARA ESTIMAR PERDA DE POTNCIAeficincia do ventilador=60%assumed / givenPara calcular a queda de pressoQueda de presso de irrigao=1040.52N/m2(pressure drop per m packing x total ht. of packing)embalagemPara embalagens local secoO/L Gas flow rate, G'=0.7242Kg / m2.s(Gas inlet flow rate - Component removed) / c/s areaO/L Gas pressure=100284.4821182186N/m2(subtracting pressure drop across packing)Densidade do Gas, G=gas mol wt. x 273 xgas o/l pr.22.41m3/Kmol T in kelvin101330=2.7853Kg/m3CD=47.5Ref. Table 6.3, Characterstics of Random packingsDelta P=CD G' 2ZG=8.94N/m2Perda de pressao por enchimento=1049.46N/m2(irrigated packing + dry packing)Perda de pressao por internos=30mmWC(packing supports and liquid distributors)=294.20N/m2Velocidade do Gas=0.884194m/sInlet expansion & outlet=1.5 x Velocity heads=1.5 x (V2 / 2g)contraction losses=0.59N m / Kg=1.67N/m2(divide by density)Perda total de presso=1345.33N/m2(packing + internals + losses)Perda total de presso=137.28Kgf/m=0.01atmFan power output=pressure drop,N/m2 x (gas in - component removed) Kg/sO/L gas density, Kg/m3=1098.91N .m / s=1.10kWPower for fan motor=1.83kW(fan power output / motor efficiency)=2.46hpCOLUMN DIAMETER / HYDRAULIC CHECKLiq.-Vap. Flow factor, FLV=(L / V) x ( V / L)=0.0848Design for an initial pressure drop of35mm H2O /m packingFrom K4 v/s FLV,K4=7.00K4 at flooding=0.85Trial % flooding=( (K4 / K4 at flooding) ) x 100=286.9720Gas mass flow rate, Vm=K4 . V ( L -- V)13.1 Fp (L / L)0.1=4.8485kg/m2.sTrial column c/s area=V / Vm(Trial As)=0.5136m2Trial column dia., D=0.8087mD =(4/pi) x Trial AsRound off 'D' to nearest standard sizeTherefore, D=1.8mColumn C/S area, As=2.5447m2As =(pi/4) x D2% flooding=57.9201% flooding = Trial % flooding x (Trial As / As)ConclusionGenerally packed towers are designed for 50% -- 85% flooding.If flooding is to be reduced,(i) Select larger packing size and repeat the above steps.OR(ii) Increase the column diameter and repeat the above steps.HETP PREDICTIONNorton's Correlation :ln HETP = n - 0.187 ln + 0.213 ln Applicable when,liquid phase surface tension > 4 dyne/cm & < 36 dyne/cmliquid viscosity > 0.08 cP & < 0.83 cPConversion :Input Data0.018N/m =18dyne/cmLiquid-phaseSurface Tension,=20dyne/cmNorton's Correlation ApplicableLiquid Viscosity=16cPNorton's Correlation NOT applicablen=1.35820Calculationln HETP=1.3885594627HETP=4.0090706754ft=1.2219647419mDiametro adotadoFor separations, less than 15 theoritical stages, a 20% design safety factor can be applied.Considering 20% safety factor,HETP=1.4663576902mFor separations, requiring 15 to 25 theoritical stages, a 15% design safety factor can be applied.Considering 15% safety factor,HETP=1.4052594531m

(1/2)For values of 'n' Refer Table 6.2For values of K4 , refer fig 11.44Refer fig 6.34Refer Table 6.3Refer Table 6.3

Tabela 6.2Table 6.2Constant for HETP CorrelationRef.:: Random Packings and Packed Towers ---- Strigle

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Fig 11.44Ref. : : Chemical Engineering, Volume-6 , COULSON & RICHARDSON'S

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Fig 6.34Ref. : : Mass Transfer Operation : : Treybal

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Tabela 6.3

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Vazao Gasppm=Massa em gramas/metro cubico*24.45/peso molecular183.661971831mg/M =PPM*PESO MOLECULAR/24.45533.3333333333m/hL/molcomposio ar m1000024.4LMolgmg/mg/4100moxigenio nitrogenio%0.2128210000086065.57377049182409836.0655737706240.982409800nitrogenio%0.78167800000319672.1311475415114754.098360656511.475114700Total0.99Cloro24kg71494873.239436619720281.69014084511440000533.335333300Vazao massicaTotal kg8964.590163934412857.8kg/10000m12835286.89xV/V:4.99871959030.0006454343114Taxa Ar/Gas20.2071948998TorreFabricadavazio0.15mcamada elimiunador0.15mbico ate eliminador otas0.3mbico ate encimento0.3mentrada ar+ recheio1.7mtotal2.45m