3M MEMBRANA Liqui-Cel, Инструкция по уборке

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8
Liqui-Cel
®
Membrane Contactors Cleaning Guidelines
V. Cleaning In Place (CIP) and Hot Water Sanitization (HWS)
A. Cleaning the Membrane
Contactor may lose its performance due to chemical or biological fouling or due to membrane
scaling. Membrane performance can also decrease or be completely lost because of loss of
its
hydrophobic functionality which can happen when membrane ‘wets out; or gets severely
oxidized. Contactor and membrane can be chemically cleaned, at warm temperature if
needed. The procedure described below includes guidelines only. Actual procedure used by
customer may vary depending on condition of membrane and should be developed in
consultation with technical representative of contactor manufacturer. In all procedure
NOTICE
Avoid contact with surfactants/solvents or oxidants (e.g. ozone, chlorine) to the
hydrophobic membrane to prevent wet-out or oxidation.
Filtered, de-chlorinated, and deionized water is recommended for mixing cleaning
solutions. Water containing metals such as Mg, Fe, Al, and SiO
2
may precipitate on to
the membrane surface when there is a pH shift in the water.
CAUTION
To reduce the risks associated with hot surfaces:
Do not touch the membrane contactor during a hot sanitization cycle and allow enough
time for the surface of the membrane contactor to cool.
To reduce the risks associated with damaging the membrane contactor:
For all 2.5x8-inch, 4-inch and 10-inch membrane contactors, gas side pressure should
never exceed liquid side pressure during cleaning.
Do not expose the membrane to air when liquid or gas temperatures exceed 30° C.
WARNING
To reduce the risks associated with explosion:
Never exceed maximum temperature and pressure ratings. Detailed temperature and
pressure ratings can be found in the Operating Guide at
www.3m.com/liqui-cel .
If cleaning the shellside of the membrane only, the lumenside should be open to
atmosphere.
To reduce the risks associated with chemical exposure:
Use face protection, protective gloves, and appropriate eye protection when handling
and using all cleaning chemicals.
Ensure any tubing or piping used to circulate the cleaning solution is not blocked,
kinked, frayed, cracked or obstructing flow in any way. Ensure the all tubing and piping
connections are leak-free.
Avoid splashing of chemicals while preparing cleaning solutions or during pumping of
solutions.
Cleaning procedures should be conducted using the minimal temperatures and
pressures required to clean the contactor.