Reverse osmosis membrane protection

Reverse osmosis membrane protection
A: (1) If the system short-term outage (1-3 days) of the protection method:
A, before the outage, the first low-pressure system (0.2 ~ 0.4MPa), large flow (about equal to the system’s water production) rinse, time 15 minutes.
B, to maintain the normal natural water, so that water flows into the dense channel.
C. Close all system valves.
D, outage every morning during the early shift, the night of the fresh water for 15 minutes. Standby up to five days, to switch operation.
(2) If the system outage for more than a week, the ambient temperature above 5 ℃ Protection:
A, before the shutdown, the first low-pressure system (0.2 ~ 0.4MPa), large flow (about equal to the system’s water production) rinse, time is 15 minutes.
B, in accordance with the system operating instructions, the choice of cleaning organic cleaning formulations for the chemical cleaning system.
C, chemical cleaning is complete, rinse the reverse osmosis membrane.
D, preparation of 0.5% sodium bisulfite solution, low pressure input system, the cycle 10 minutes.
E, shut down all the valves of the system, for storage.
(3) the system outage more than 10 days, the membrane protection methods:
A, before the shutdown, the first low-pressure system (0.2 ~ 0.4MPa), large flow (about equal to the system’s water production) rinse, time is 15 minutes.
B, in accordance with the operating instructions for the use of cleaning methods for chemical cleaning system.
C, chemical cleaning is complete, rinse the reverse osmosis membrane.
D, preparation of 0.5% sodium bisulfite solution, low pressure input system, the cycle 10 minutes.
E, shut down all the valves of the system, for storage. Note that a 0.5% solution of sodium bisulfite must be changed every 30 days.