15,000 kg / h of colloidal solution of composition 5% by weight enter a simple evaporator...

15,000 kg / h of colloidal solution of composition 5% by weight enter a simple evaporator and must be concentrated up to 20% by weight. Heating is effected by means of live steam which condenses at 110 ° C and the condensate leaves the condensation chamber without cooling. An absolute pressure of 250 mm Hg is maintained in the evaporation chamber. The solution has no appreciable increase in boiling point, and its specific heat can be considered equal to unity for all con. centrations. The feed enters at 20 ° C. The integral coefficient of heat transmission for the operating conditions is 1,800 Kcal / m2.h. ° C. The steam from the solution is condensed in a direct contact condenser with water that enters the condenser at 20 ° C and exits at 50 ° C. Calculate: a) The heating surface b) the hourly consumption of live steam c) hourly water consumption for condesacion

Expert Solution

Amanda K answered 5 months ago

An evaporator is used to concentrate 4536 kg/h of a 20% NaOH solution entering at 60?C...

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