3M MEMBRANA Liqui-Cel Instruction Manual

Cleaning Guidelines

Liqui-Cel® MembraneContactors
Cleaning Guidelines
TABLE OF CONTENTS
I. Intent of Document----------------------------------------------------------------------------------------------3
II. Cleaning Parameters -------------------------------------------------------------------------------------------3
III. Chemical Compatibility / Sanitization / Detergents---------------------------------------------------4
IV. Cleaning Solution Flow Rate and Backpressure Guidelines --------------------------------------6
V. High Temperature & CIP Cleaning -------------------------------------------------------------------------8
A. Cleaning the Membrane--------------------------------------------------------------------------------8
B. Sanitization of the Cleaned Membrane-------------------------------------------------------------9
VI. Cleaning Protocol for Biological Soil Removal ------------------------------------------------------10
A. Biological Soil Removal-------------------------------------------------------------------------------12
B. Severe Biological Soil Cleaning Protocol---------------------------------------------------------12
VII. Cleaning Protocol for Mineral Deposits Removal--------------------------------------------------- 15
VIII. Cleaning Protocol When Particle Fouling Is Suspected ------------------------------------------17
IX. Membrane Drying----------------------------------------------------------------------------------------------19
A. Bulk Water Removal-----------------------------------------------------------------------------------19
B. Final Drying----------------------------------------------------------------------------------------------20
C. Drying Schematics-------------------------------------------------------------------------------------20
X. Membrane Contactor Integrity Test----------------------------------------------------------------------22
XI. Storage and Handling Guidelines ------------------------------------------------------------------------23
XII. Contactor Decontamination for Return to 3M --------------------------------------------------------24
TABLES
Table 1 Sanitizing Guidelines--------------------------------------------------------------------------------4
Table 2 Cleaning Solution Flow Rate and Backpressure Guidelines ------------------------------7
Table 3 High Temperature Sanitization Guidelines ----------------------------------------------------9
Table 4 Recommended Cleaning Procedure For Normal Biological Fouling ------------------ 11
Table 5 Recommended Cleaning Procedure For Severe Fouling-------------------------------- 12
Table 6 Cleaning Protocol for Mineral Deposit Removal ------------------------------------------- 16
Table 7 Bulk Water Removal Conditions --------------------------------------------------------------- 19
Table 8 Final Drying Conditions--------------------------------------------------------------------------- 20
Table 9 Membrane Contactor Integrity Test ----------------------------------------------------------- 22
Table 10 Typical Drip Rate Out of Lumenside Port---------------------------------------------------- 22
ILLUSTRATIONS
Illustration 1 Flow Schematic for Normal Biological Soil Removal------------------------------- 13
Illustration 2 Flow Schematic for Severe Biological Soil Removal ------------------------------- 14
Illustration 3 Flow Schematic for Acid Cleaning to Remove Mineral Deposits ---------------- 16
Illustration 4 Flow Schematic for Particle Fouling---------------------------------------------------- 18
Illustration 5 Bulk Water Removal / Initial Drying Step---------------------------------------------- 20
Illustration 6 Final Drying----------------------------------------------------------------------------------- 21

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Liqui-Cel® MembraneContactors
Cleaning Guidelines
Warning: Explosion
Warning: Crush or Impact
Caution: Lifting or Moving Hazard
Caution: Possible EnvironmentalImpact
SAFETY INFORMATION
Read, understand, and follow all safety information contained in these instructions prior to the use of this
Liqui-Cel® Membrane Contactor. Retain these instructions for future reference.
Intended Use:
This Liqui-Cel Membrane Contactor is intended to add to or remove dissolved gases from non dangerous liquid
streams. It is expected that all users be fully trained in the safe operation of membrane contactors. Membrane
contactors are intended for installation and operation by qualified installers and operators in accordance with all
operating guidelines, installation instructions, and any other industry requirements. Use in any other application
may not have been evaluated by 3M and maylead to an unsafe condition.
Explanation of Safety and RelatedSymbols
Warning: Explosion
Warning: Crush or Impact
Caution: Lifting or MovingHazard
Caution: Possible EnvironmentalImpact
Explanation of Signal Word Consequences
WARNING:
CAUTION:
NOTICE:
Indicates a hazardous situation which, if not avoided, could resultin
serious injury or death.
Indicates a hazardous situation which, if not avoided, could resultin
minor or moderate injury and/or propertydamage.
Indicates a situation which, if not avoided, could result inproperty
damage.

2
Liqui-Cel® MembraneContactors
Cleaning Guidelines
WARNING
To reduce the risks associated withexplosion:
Never exceed maximum temperature and pressure ratings. Detailed temperatureand
pressure ratings can be found in the Operating Guide atwww.3m.com/liqui-cel.
If cleaning the shellside of the membrane only, the lumenside should be openat
atmospheric pressure.
Only use replacement parts supplied by 3M for thisproduct.
To reduce the risks associated with crush orimpact related injuries:
Always ensure the membrane contactor is properly secured. Be sure the membrane
contactor cannot tip, roll, fall, slide or make any movement that may cause injury or
damage to other system components.
Care must be taken not to hit or jar (shock) the membranecontactor
To reduce the risks associated with lifting ormoving:
Always consult the product datasheet or operating guide for membranecontactor
weights. Use appropriately rated lifting equipment for lifting or moving heavy
membrane contactors.
Drain liquid from the contactor before moving. Do not move a membrane contactor
while it contains liquid.
To reduce the risks associated with chemicalexposure:
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 temperaturesand
pressures required to clean thecontactor.
CAUTION
To reduce the risks associated with hotsurfaces:
Do not touch the membrane contactor during a hot sanitization cycle and allowenough
time for the surface of the membrane contactor tocool.
To reduce the risks associated with environmental contamination:
At the end of useable life, dispose of the membrane contactor or cartridgesin
accordance with local regulations and laws.
To reduce the risks associated with damaging the membrane contactor:
For all 2.5x8-inch, 4-inch and 10-inch membrane contactors, lumen side pressure
should never exceed shell side pressure duringcleaning.
Do not expose the membrane to air when liquid or gas temperatures exceed 30°C.

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Liqui-Cel® MembraneContactors
Cleaning Guidelines
IMPORTANT INFORMATION - PLEASE READCAREFULLY
I. Intent of Document
There are many different types of contaminants that may adhere to the membrane. The cleaning
protocol, which covers chemical cleaning agents, concentrations, time and flow rates, will be
specific to each system. In all cleaning procedure discussed below it is assumed that cleaning is
intended for the water-contact side of the membrane.
II. Cleaning Parameters
There are four parameters that affect the cleaning process:
Time (duration andfrequency)
Temperature Mechanical shearing on membrane surface by flowing liquids
Chemical type and chemical strength (caustic, acid, alcohol,etc.)
Changing any one of these parameters can affect the others. Therefore, it is important todevelop
a specific cleaning protocol for your application. These guidelines will guide you through the
cleaning process. We recommend starting with cleaning chemicals that are generally used within
your industry.
The initial performance of the contactor should be monitored to establish its baseline
performance. This baseline performance can be compared to the performance of thecontactor
after cleaning. Other considerations for establishing the best protocol for your applicationsare:
Experimentation with time (frequency and duration), temperature, chemicalconcentration
and cleaning liquid flow rate will determine the best method for cleaning thecontactor.
Refer to the Liqui-Cel® Membrane Contactor product data sheet for maximum temperature
and pressure ratings. Take into account the rise in temperature that occurs during a
physical or chemical reaction such as mixing of water with caustic soda or sulfuric acid, or
mixing of acids and bases or frompumping.
An aggressive cleaning protocol may clean the contactor in a shorter time period, but can
also reduce the contactor service life.
Generally, the cleaning frequency can be determined by monitoring a decrease in
system gas transfer efficiency or increase in pressure drop in liquid or gas phases.
For general questions about chemical resistance, refer to the Liqui-Cel MembraneContactor
Chemical Resistance Guide available at www.liqui-cel.com or contact a 3Mrepresentative.
NOTICE
Avoid contacting membrane to surfactants or solvents to prevent membrane wet-out.
Do not expose membrane to oxidizing species such as ozone, chlorine, hydrogen
peroxide, peracetic acid, etc. to prevent membrane oxidation.
Filtered, de-chlorinated, and deionized water is recommended for mixing cleaning
solutions. Water containing sparingly soluble compounds of Ca, Mg, Fe, etc. and silica
(SiO2) may precipitate on to the membrane surface when there is a pH shift in the
water.
Failure to follow any instructions in this guide will void any warranty, if any exists.
Store dry membrane contactor(s) at temperatures < 49° C(120° F) with low to
moderate humidity levels (<60% relative humidity).
The membrane contactor(s) should not be stored where they are exposed to direct
sunlight. Membrane contactors should always be stored in sealed bags or shrink wrap
material and in the original box or other opaque box.