Question

In a single-effect evaporator, 10\% NaOH solution is concentrated and 40\% NaOH solution is obtained. The feed flow rate is 1000 kg/h. The latent heat of evaporation of steam used as a heating medium is 500 kcal/kg. The enthalpy of the superheated steam leaving the evaporator is 600 kcal/kg. The enthalpy of the dilute feed solution is 25 kcal/kg, while that of the concentrated solution is 100 kcal/kg. Calculate the steam consumption.

          In a single-effect evaporator, 10\% NaOH solution is concentrated and 40\% NaOH solution is obtained.
The feed flow rate is 1000 kg/h. The latent heat of evaporation of steam used as a heating medium is
500 kcal/kg. The enthalpy of the superheated steam leaving the evaporator is 600 kcal/kg. The enthalpy
of the dilute feed solution is 25 kcal/kg, while that of the concentrated solution is 100 kcal/kg. Calculate
the steam consumption.

In a single-effect evaporator, 10% NaOH solution is concentrated and 40% NaOH solution is obtained.
The feed flow rate is 1000 kg/h. The latent heat of evaporation of steam used as a heating medium is
500 kcal/kg. The enthalpy of the superheated steam leaving the evaporator is 600 kcal/kg. The enthalpy
of the dilute feed solution is 25 kcal/kg, while that of the concentrated solution is 100 kcal/kg. Calculate
the steam consumption.

Added by Derek U.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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In a single-effect evaporator, 10% NaOH solution is concentrated and 40% NaOH solution is obtained. The feed flow rate is 1000 kg/h. The latent heat of evaporation of steam used as a heating medium is 500 kcal/kg. The enthalpy of the superheated steam leaving the evaporator is 600 kcal/kg. The enthalpy of the dilute feed solution is 25 kcal/kg, while that of the concentrated solution is 100 kcal/kg. Calculate the steam consumption.