Dry salt is to be produced at a rate of 20000 kg/h by evaporating water from a feed containing 20% NaCl. The brine (27% NaCl) leaving the evaporator may either be recycled to the evaporator or may be discarded. If the brine produced is 25% of the weight of dry salt, calculate: (a) The feed rate if the brine is recycled (b) The percent excess of the feed rate if the brine is discarded over that required when the brine is recycled.
Added by Marina R.
Close
Step 1
- Dry salt production rate = 20,000 kg/h - Salt concentration in feed = 20% NaCl - Salt concentration in brine = 27% NaCl - Brine is 25% of the weight of dry salt produced Show more…
Show all steps
Your feedback will help us improve your experience
Joshua Klint and 82 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Adi S.
A triple effect evaporator is designed to reduce water from an incoming brine (NaCl+H2O) stream from 75 wt% to 3 wt%. The target of the process is to produce 14670 lbm/h of the final product (NaCl along with 3 wt% H2O). A labeled flowchart of the process is given below. (a) Perform the degree-of-freedom analysis. (b) Calculate the feed rate of the brine in lbm/h. (c) Calculate the water removed from the brine in each evaporator in lbm/h. V1 mass fr H2O 1.00 V2 mass fr H2O 1.00 V3 mass fr H2O 1.00 Brine F lb/hr I II III mass fr NaCl 0.25 H2O 0.75 P1 mass fr NaCl 0.33 H2O 0.67 P2 mass fr NaCl 0.50 H2O 0.50 P3 14,670 lb/hr mass fr NaCl 0.97 H2O 0.03
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Watch the video solution with this free unlock.
EMAIL
PASSWORD