Application of the Pulse Column to the Purex Process Page: 19 of 35
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UNCLASSIFIED -17- HW-49542
The uranium extraction behavior of the two cartridges was also
similar. They both gave H. T. U. values between 0. 6 and 1. 0 foot at pulse
frequencies ranging from 60 to 100 cycles/minute and volume velocities of
500 to 1000 gal/hr - sq ft. It is also of interest to note that the nozzle plate
cartridge operated just as efficiently with the aqueous phase continuous.
Scrub Section. The most promising scrub section cartridge found was a
mixed cartridge containing alternate pairs of fluorothene and stainless steel
sieve plates. The fluorothene plates had 3/16-inch-diameter holes and 23
per cent free area. The stainless steel plates had 0. 08-inch-diameter holes
and 21 per cent free area. A one-inch plate spacing was used throughout.
The mixed cartridge had flooding pulse frequencies of 125 and 105
cycles/minute at volume velocities of 250 and 500* gal/hr - sq ft respec-
tively. For comparison, a "standard cartridge" scrub section (aqueous
phase continuous)showed flooding frequencies of 125 and 85 cycles/minute
at similar throughputs.
The extraction section controlled the flooding only at lower through-
puts for the aqueous phase continuous case. However, extraction section
controlled the flooding at all throughputs studied for the organic phase con-
tinuous case.
Scrub section efficiency studies were based on the transfer of
chloride ion which has an organic-to-aqueous distribution ratio between
0. 12 and 0. 13. This is about the same order-of -magnitude as might be
expected of some fission product distribution ratios.
Tests made in a scrub section containing a "standard cartridge"
indicated that the efficiency was sharply frequency sensitive. H. T. U.
values ranged from 3. 2 to 1. 8 feet at pulse frequencies of 60 and 100 cycles/
minute, respectively (volume velocities = 250 to 500 gal/hr - sq ft).
*A scrub section volume velocity of 500 gal/hr - sq ft is equivalent in uran-
ium capacity to an extraction section volume velocity of 1000 gal/hr - sq ft
for a dual-diameter column with a scrub-to-extraction-diameter ratio of
4 to 3.UNCLASSIFIED
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Geier, R. G. Application of the Pulse Column to the Purex Process, report, April 1, 1957; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1017719/m1/19/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.