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TMM-240
Shutdown considerations for RO systems
TORAY REVERSE OSMOSIS ELEMENTS section page:
3
/
4
Operation, Maintenance and Handling Manual rev.: 105
Version: October 2012
1) When the pressure vessels are filled with flushing water, isolate the
train by closing all isolation valves.
2) Repeat 1) and 2) above every 24 hours.
For detailed instructions of flushing procedures, see TMM-250: Flushing
procedure.
Long-Term Shut-down
Definition:
Long-term shut-down is for periods where an RO plant must remain out of
operation for more than four days with the RO elements remaining in the
pressure vessels.
Prepare each RO train as follows:
Case.1)
Flushing the RO system when sufficient flushing water is
available.
Flush with flushing water for 0.5-1.0 hour at least every 2 days,
while simultaneously venting any air from the system. When the
pressure tubes are filled, close the valves.
For detailed instructions, see TMM-250 Flushing procedure
Case.2)
Flushing the RO system when no flushing water source is
available
a) Circulate permeate through the system. While circulating
permeate through the system inject the RO system flush line
with a 500 to 1000 mg/l (maximum) SBS solution. This
solution will serve to inhibit biological growth during the shut
down period. Circulate for 30 – 60 minutes.
b) Make sure the RO system is completely filled with the SBS
solution . To prevent the solution from draining from the
system take care to close all system isolation valves.
c) The pH of the preservative solution should never be allowed to
drop below 3.0. The pH should be checked regularly. If the pH
drops below 3.2, the preservative solution should be drained
and replaced as soon as possible.
Page 55
Coral Sea Owner's Manual
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Содержание Coral Sea
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Страница 28: ...SECTION 4 INSTALLATION REQUIREMENTS Coral Sea Owner s Manual...
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