An evaporator is used to concentrate 4536 kg/hr (10,000 lb/h) of a 20% solution of NaOH in water entering at 600C (1400F) to a product of 50% solids. The pressure of the saturated steam used is 172.3 kPa (25 psia) and the pressure of the vapor phase in the evaporator is 11.7 kPa (1.7 psia). Th
An evaporator is used to concentrate 4536 kg/hr (10,000 lb/h) of a 20% solution of NaOH in water entering at 600C (1400F) to a product of 50% solids. The pressure of the saturated steam used is 172.3 kPa (25 psia) and the pressure of the vapor phase in the evaporator is 11.7 kPa (1.7 psia). Th
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An evaporator is used to concentrate 4536 kg/hr (10,000 lb/h) of a 20% solution of NaOH in water entering at 600C (1400F) to a product of 50% solids. The pressure of the saturated steam used is 172.3 kPa (25 psia) and the pressure of the vapor phase in the evaporator is 11.7 kPa (1.7 psia). The overall heat transfer coefficient is 1560 W/m2-K (275 BTU/h-ft2 – 0F). Calculate for the steam used, steam economy, and heating surface area.
7. The adjusted enthalpy of the vapor product due to boiling point rise can be calculated.
8. The amount of steam can be calculated using the enthalpy balance equation.
9. The steam economy can be calculated
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