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TMM-320
Instructions for chemical cleaning
TORAY REVERSE OSMOSIS ELEMENTS section page:
1
/
8
Operation, Maintenance and Handling Manual rev.: 105
v
ersion: October 2012
Instructions for chemical cleaning
General guidelines
Chemical maintenance cleanings are performed to remove contaminates from
membrane surfaces by dissolving and/or separating through physical and
chemical interaction with cleaning chemicals.
It is good practice to perform a system flush prior to initiating a
chemical maintenance cleaning If the RO system is to be shut down
for and extended time it is recommended that a chemical cleaning be
performed prior to the introduction of any chemical preservatives
After any chemical cleaning, it is recommended that the system be
thoroughly flushed with either pre-treated raw water or permeate to
insure removal of any residual cleaning chemicals dissolved or
suspended solids from the RO system. See TMM Section 250 for
flushing procedures.
CIP agents: Generic cleaning chemicals are listed in Table 320-1
Make-up water: Softened water or permeate, free of heavy metals, residual
chlorine or other oxidizing agents.
Required quantity of
CIP solution:
x
40 – 80 liters (11 - 22 gallons) per 8 - inch element
(depending on the severity of the fouling)
x
10 – 20 liters (3 - 6 gallons)per 4 - inch element
(depending on the severity of the fouling)
CIP pressure: Low pressure (0.1 – 0.2 MPa [15 – 30 psi])
CIP flow rate
Recommended
flow rate:
Min. feed flow rate:
100
̺
150 L/min ([25-40gpm], [6-9m
3
/h]) per 8inch Vessel;
25
̺
36 L/min ([6.5-10gpm], [1.5-2.2m
3
/h]) per 4inch Vessel;
The goal is to try and achieve the recommended cleaning
flow rates above while keeping the cleaning solution pressure
within the CIP pressure range of 15-30 psi.
50 l/min (13.2 gallons/min) for each 8 - inch vessel
10 l/min (2.7gallons/min) for each 4 - inch vessel
Page 64
Coral Sea Owner's Manual
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