amiad Omega 13.5K, Руководство по установке и эксплуатации

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O M EG A F i l t e r s – I n s t a l la t io n & O p e r a t io n M a n u a l P a g e 6 o f 3 6
Maintenance
Screen COP (Clean-Out-of-Place)
e. Screen COP (Clean-Out-of-Place)
Screens cleaning is required as part of the maintenance procedure or in case the filtration system is
significantly clogged. In most cases cleaning with high pressure washer is sufficient.
a) Wash the Screens with high pressure washer.
b) Rinse the Screens from outside-in, and then rinse their interior surface.
c) Check the Screens for clogged surface and any mechanical damage, using a strong flashlight.
Dissolved precipitates and scale:
If the Screen is clogged with dissolved precipitants that cannot be removed by the pressure washing,
chemical treatment is required.
Chemical or detergent selection depends on precipitants origin. Mineral or Organic.
Acid treatment:
Used for dissolving Calcium Carbonate, Magnesium Carbonate compounds, Iron and Manganese Oxides.
Most of the mineral acids are suitable for the treatment (as long as they do not contain gypsum). The
common ones are:
•
Hydrochloric acid (HCL)
•
Sulfuric acid (H2SO4)
It is recommended to dilute the acid to a concentration of about 2% in which case the acid is still effective
but is less dangerous.
Remove the seals from the Screen cylinder and soak it in the solution for 10 – 20 minutes (depending on
the amount and kind of precipitates).
The Screen should then be checked, if the Screen is not clean, continue with the process for additional
10 – 20 minutes.
If the Screen is clean, wash it thoroughly with clean water.
Organic and Biofilm Removal:
Organic Compounds and Biofilm can be cleaned with Sodium Hypochlorite (NaClO) solution or Calcium
chlorite (CaClO2) at 0.5%, for about 2 minutes. If the Screen is not clean, continue with the process for
additional 2 minutes.
If the Screen is clean, wash it thoroughly with clean water.
WARNING! The above chemicals are harmful to people and equipment. Read and follow manufacturer’s
instructions and MSDS. Use ALL precautions and protective gear when working with the Chemicals
to prevent contact with skin, eyes & mouth.