Repeat Example 15.24, except for a feed containing 400 ppm (by weight) of CaCl2 and 50 ppm
Question:
Repeat Example 15.24, except for a feed containing 400 ppm (by weight) of CaCl2 and 50 ppm of NaCl.
Example 15.24
Hard water containing 500 ppm (by weight) MgCO3 and 50 ppm NaCl is to be softened at 25C in an existing fixed, gel resin bed with a cation capacity of 2.3 eq/L of bed volume. The bed is 8.5 ft in diameter and packed to a height of 10 ft, with a wetted-resin void fraction of 0.38. During loading, the recommended throughput is 15 gal/minute-ft2. During displacement, regeneration, and washing, flow rate is reduced to 1.5 gal/minute-ft2. The displacement and regeneration solutions are water-saturated with NaCl (26 wt%).
Determine:
(a) Feed flow rate, L/minute;
(b) Loading time to breakthrough, h;
(c) Loading wave-front velocity, cm/minute;
(d) Regeneration solution flow rate, L/minute; and
(e) Displacement time, h.
Step by Step Answer:
Separation Process Principles Chemical And Biochemical Principles
ISBN: 9780470481837
3rd Edition
Authors: By J. D. Seader, Ernest J. Henley, D. Keith Roper