A triple effect forward-feed evaporator is used to concentrate 6 kg/s of 14% mass fraction of...

A triple effect forward-feed evaporator is used to concentrate 6 kg/s of 14% mass fraction of caustic soda at 75C to 47% mass fraction. Steam input in first effect is 150C. Vapour from the third effect is 39C at 7kPa. Overall heat transfer coefficient in effect 1, U1 is 3000 W/m2 K, effect 2, U2 is 2000 W/m2 K and effect 3, U3 is 1250 W/m2 K.

Find boiling point elevation in each effect.

Expert Solution

Amanda K answered 4 months ago

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