Calculation For Triple Effect Evaporator Forward Feed DESCRIPTION OF PROBLEMYou are required to design a triple effect evaporator to concentrate 25000 kg/h of solution at 38 deg C, containing 10% solids to a product which contains 50% solids. Steam is available at 1.877kg/cm2 and the last efect will be assumed to be operated at vacuum of 66 cm Hg referred to 66 cmhg barometer. Water is available at 29 deg C for use in barometric condenser. Assume negligible BPE . average specific heats of 1 in all the effect. The condensate from each effect leaving at its saturation temp egligible radiation losses, avg pressure drop equal in each effect and ht and dia of each tube is 150 cm and 5 cm respectively. Find out the no of tubes required for the purpose , heat consumption and evaporation per kg of steam, if U1,U2,U3 are 2930 ,1220 and 610 kcal/hr.m2.deg C respectively.
CALCULATIONS (part-1) Applying overall material balance F = E + P3 component balance F*XF = P1*Xp1 P1*XP1=P2*Xp2 P2*XP2 = P3*Xp3 hence: F*Xf = P3 * Xp3 P3 = 5000 E = (F - P3)= 20000 Temperature distribution and calculation ∆ T = Ts - Tv3 -∑Bpr ∑Bpr