Annual Report (FY 1969): Freeport Test Facility and Vertical-Tube-Evaporator Test-Bed Plant, Freeport, Texas Page: 72
viii, 128 : graphs, ill., tablesView a full description of this report.
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SECTION IV
ACTIVITIES
3. MODIFICATIONS (CONTD)
C. Buildings
A new 3 1/2 ton air conditioner with 70% recirculation was added to the
switch house. This effectively eliminated the pump breaker over-
heating problems and provided a dry, dust-free environment for plant
electrical gear.
D. Pumps
During September, 1968, anticipating the installation of porcelain
spray nozzles in No. 9 effect, modifications were made to P-18 to
increase its discharge head. These included a new 25 HP, 1800 RPM
motor, and the trimming of a 316 S.S. impeller from 13" to 9" diameter.
New acid pump suction piping with a large cross-section and dump lines
to a special chemical sewer was installed in November, 1968. This
was to help eliminate pump plugging by providing a method of removing
the acid sludge from the suction lines.
E. Auxiliary Test Unit
As part of testing schedule to determine the calcium sulfate (anhydrite)
scaling point, the unit was retubed in August, 1968, with new 316
stainless steel tubes. Following this test, and before run 16 started
in December, 1968, a major modification was made. This included the
following:
a. Steam chest was shortened from 22' to 14'.
b. Brine discharge, condensate, and bottom vent
piping were altered to fit the smaller steam chest.
c. Sump access platform was raised and modified.
d. Seven 14', 2" O.D., spirally grooved, 90-10
Cu-Ni tubes were installed.
F. Heat Exchangers
In October, 1968, HX-200 was completely removed from the plant. At
this time the waterboxes were perforated and the admiralty tubes were
severely corroded, although no failures had yet occurred. It was
planned possibly to use this exchanger as a materials test in the
future.
During the same month, HX-306(b) was removed from service to allow a new
experimental preheater, HX-306(x), to be installed in its place.
New brass nipples and valves were installed on all heat exchanger
vents and drains. This was necessary to stop the high rate of failure
at these points due to galvanic corrosion.-72-
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Campbell, Keith S. & Williams, Donald L. Annual Report (FY 1969): Freeport Test Facility and Vertical-Tube-Evaporator Test-Bed Plant, Freeport, Texas, report, 1969; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc11743/m1/79/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.