Parker Coral Sea, Руководство пользователя

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TMM-240
Shutdown considerations for RO systems
TORAY REVERSE OSMOSIS ELEMENTS section page:
2
/
4
Operation, Maintenance and Handling Manual rev.: 105
Version: October 2012
If multiple RO trains are running in parallel, and one
train is to be shut down, care should be taken to
assure the train to be shut down is properly isolated
from the common header piping using check valves
or isolation valves. It is most important that
pressure relief valves be present and installed on
each individual train permeate line.
4) Membrane elements should not, under any circumstances, be exposed
to chlorine or other chemical oxidants. Any such exposure may result in
damage to the membrane, possibly resulting in irreversible increase in
salt passage.
5) Extra care must be taken to avoid chlorine exposure
㺃
When disinfecting piping or pretreatment equipment upstream of the
membrane
㺃 When preparing cleaning or storage solutions
㺃
Care must be taken to ensure that no trace of chlorine is present in the
feed water to the RO membrane elements.
㺃 If residual chlorine is known to be present in the RO feed, it must be
removed with sodium bisulfite (SBS) solution in stoichiometric
excess , allowing sufficient contact time to accomplish complete
dechlorination.
Short-Term Shut-down
Definition:
Short-term shut-down is for periods where an RO plant must remain out of
operation for more than one day, but fewer than four days, with the RO
elements remaining loaded in the vessels.
Prepare each RO train as follows:
Flush the RO section with flushing water, while simultaneously venting any
air from the system feed piping.
Page 54
Coral Sea Owner's Manual
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