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1、Determination of the amount of absorbentPrinciples of Chemical Engineering-CDUTDetermination of the Amount of Absorbent1.The minimum liquid-gas ratioIn the calculation of the absorption tower,the gas treatmentcapacity is usually known,and the amount of absorbent needs tobe determined by process calc
2、ulation.In the case of a certainamount of gas,to determine the amount of absorbent is todetermine the liquid-gas ratio L/V.The method to determine the liquid-gas ratio is to first calculatethe minimum liquid-gas ratio(L/V)minof the absorption process,and then determine the appropriate(operation)liqu
3、id-gas ratioaccording to the engineering experience.Principles of Chemical Engineering-CDUTDetermination of the Amount of AbsorbentMinimum Liquid-gas Ratio of Absorption Tower2X2Y1YT1XBB1X*B*1XVL)(VLmin)(VLY*=f(X)Principles of Chemical Engineering-CDUTDetermination of the Amount of AbsorbentThe mini
4、mum liquid-gas ratio can be obtained by graphic method:21212*121min/XmYYYXXYYVLVXXYYL2*121min12Amin1()m YYLmVYThe minimum liquid-gas ratioThe inimum amount of solventPure solvent absorptionPrinciples of Chemical Engineering-CDUTDetermination of the Amount of AbsorbentThe Minimum Liquid-Gas Ratio of
5、Absorption Tower(Abnormal Curve)LVYYXX min1212LYYXXVmin 1212Y*=f(X)Principles of Chemical Engineering-CDUTDetermination of the Amount of AbsorbentThe handling capacity V is fixed.LL/VOperating costEquipment costPacking layer heightPower consumptionAccording to the practical experience of production:LVLV1120.minLL 1120.minDriving forceSuitable liquid-gas ratioSuitable amount of solvent