Toray TORAYFIL HFU AN Series Manuel utilisateur
Issued in December 2018
TORAY Pressurized PVDF Hollow Fiber
Membrane Module "TORAYFILTM"
Instruction Manual
Model: "HFU series" (type AN)
Issued by Toray Industries, Inc.
Water Treatment & Environment Division
2-1-1, Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8666 Japan
Tel: +81-3-3245-4552
Fax: +81-3-3245-4913
URL: www.toraywater.com
BJAHABJE
Content
I. Introduction .................................................................................................. 1
1. Characteristics of Toray "HFU series" Membrane Modules.......................1
2. About “type AN”......................................................................................... 2
3. Applications of Toray "HFU series" Membrane Module.............................2
II. For Your Safety ............................................................................................3
1. Safety Instruction for Unpacking and Installation ......................................4
2. Safety Instruction for Filtration Operation..................................................6
3. Safety Instruction for Chemical Cleaning ..................................................8
4. Safety Instruction for Disposal ..................................................................9
III.
Specifications of Toray "HFU series" Membrane Module
................................. 10
IV.
Configuration of Toray "HFU series" Membrane Module
.................................. 13
V. Installation.................................................................................................. 14
VI. Operation ................................................................................................ 17
1. Filtration .................................................................................................. 17
2. Backwash and Air-scrubbing................................................................... 19
3. Toray Maintenance Cleaning................................................................... 22
4. Basic Trans-Membrane Pressure Calculation......................................... 25
5. Temperature Correction Factor ............................................................... 26
VII. Chemical Cleaning.................................................................................. 27
VIII. Storage of Membrane Module ............................................................. 31
1. Storage of New Membrane Modules....................................................... 31
2. Storage of Membrane Modules after use................................................ 31
3. Replace Preservative Chemical .............................................................. 32
1
I. Introduction
Toray PVDF Hollow Fiber Membrane Module "HFU series" is a pressurized
hollow fiber UF (Ultra Filtration) membrane module developed with polymer
science and membrane fabrication technologies accumulated over decades of
successful membrane manufacturing at Toray Industries, Inc.
The membrane material is Polyvinylidene fluoride (PVDF). The nominal pore
size of the membrane is 0.01 micron.
The module, which is permanently potted in its casing, is pressure-driven which
provides equal filtrate quality to submerged modules, while offering greater TMP
range for more flexible plant operation. Maximum operating pressure is 300 kPa
(43.5 PSI). Flow direction is outside-in, which is more suitable for higher
turbidity water treatment because of the air-scrubbing effectiveness.
Additionally, outside-in modules are able to remove suspended solids more
effectively at higher recovery rates compared to inside-out fibers.
1. Characteristics of Toray "HFU series" Membrane Modules
(1) High Filtration Flux
HFU series provides high filtration flux and stable operation for the filtration
of various raw water sources. The membrane is made with a special
spinning method, which enables high permeability and high fouling resistance.
(2) Excellent Water Quality
HFU series provides very good water quality for the filtrate, extremely low
turbidity since the membrane has 0.01 micron nominal pore size. HFU
series is recommended to be applied to the tertiary treatment of sewage
water and RO pretreatment in seawater desalination.
(3) High Mechanical Strength
The membrane of HFU series has very high mechanical strength because it
is made of PVDF with the special spinning method developed by Toray.
HFU series provides high integrity and durability under recommended
2
operating conditions.
(4) High Chemical Durability
The membrane material of HFU series is PVDF, which allows you to clean
the membrane with high concentrations of chlorine and with high
concentrations of acid resulting in better cleaning and longer sustainable
membrane flux rates.
2. About “type AN”
“Type AN” is a module type which has a slightly modified housing with new
integrated cap, with improved sealing properties. All connecting ports of "Type
AN" modules are identical to "Type N" modules, so "Type AN" modules can
directly replace existing "Type N" modules.
3. Applications of Toray "HFU series" Membrane Module
Drinking Water Production
Tertiary Treatment of Sewage Water
RO Pretreatment in Seawater Desalination
Industrial Water Production
Reuse of Industrial Waste Water
3
II. For Your Safety
Please be sure to read and follow the instructions below before using HFU
series. This manual should be retained for future reference.
Follow the safety precautions as they are intended to protect operators and
equipment from various risks such as physical harm and/or property
damage. The following table shows a level of potential risk for each
indicated symbol.
This symbol indicates an imminent hazardous situation
which will result in serious injury or death when the
instruction is not observed.
This symbol indicates a potentially hazardous situation
which will result in serious injury or death when the
instruction is not observed.
This symbol indicates a potentially hazardous situation
which might result in injury or property damage when
the instruction is not observed.
The following table explains the information to be noted.
“Prohibited”
This symbol indicates a prohibited action or procedure.
“Instruction”
This symbol indicates an important action or
procedure which has to be taken without fail.
Prohibited
!
!
Instruction
4
1. Safety Instruction for Unpacking and Installation
Be sure to wear safety gear such as rubber gloves and safety glasses
for unpacking. The membrane is packaged in sodium hypochlorite
solution (100 mg/L). If the solution happens to splash onto the skin,
wash the affected part with running water. If the solution happens to
get in the eyes or mouth, wash the affected part with sufficient amounts
of clean running water for more than 15 minutes and see the doctor
immediately.
Be sure to wear safety gear such as a helmet and safety shoes to avoid
injury.
The preservative solution should be drained out before using the
modules. After that, keep clean water in the modules to prevent the
hollow fiber membrane from drying out. Do not allow the modules to
dry even for a few hours.
The membrane modules should not be frozen.
Be careful not to damage or dent the modules during handling.
!
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Instruction
!
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Instruction
Prohibited
Prohibited
Prohibited
5
Housing type joints are applied for connecting the modules of HFU-
2020AN or HFU-1020AN to the piping. Follow the instruction of the
Housing Type Joints Set-up Guide at the connection point. Wrong
connections may damage the modules.
Keep the connection surface free of any dirt or oils.
Be sure to install the modules vertically for effective air scrubbing.
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Instruction
Prohibited
!
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Instruction
6
2. Safety Instruction for Filtration Operation
Flush all the piping out with clean water and make sure no debris is
remaining in the piping prior to connecting the modules.
Confirm that the preservative chemical in the modules is completely
drained out before starting the filtration operation. The preservative
chemical is harmful to humans.
Flush the modules at low pressure, filling from the bottom, and vent to
remove any air from the modules. Air left in the modules may cause
water hammer and may result in damage to the membrane.
Prior to use, make certain modules are flushed. Filtrate water should
be drained unless it meets the required quality.
Protect modules from direct sunlight and ultraviolet light. Ultraviolet
light can degrade module housing and membranes.
Constantly monitor filtrate water quality such as turbidity and/or the
number of particles during filtration, and stop the operation if abnormal
water quality is detected.
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!
Instruction
!
!
Instruction
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!
Instruction
!
!
Instruction
!
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Instruction
!
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Instruction
7
Do not exceed the maximum applicable pressure of 300 kPa (43.5 PSI).
Higher pressures can damage the modules. Do not exceed the
maximum temperature of 40 degree C (104 degree F). The higher
temperature damages the modules.
Do not freeze the membrane modules.
The operating conditions, including the filtration flux and the periodical
physical cleaning, must be properly set-up otherwise the trans-
membrane pressure may rise too quickly. The operation range is
described in the latter section of this manual.
Do not overfeed air to the modules. Excessive scrubbing air damages
the membranes and/or shortens the membrane life.
The air flow rate should be within the range below for each module type.
HFU-2020AN: 4.8 – 9.0 Nm3/h (2.8 – 5.3 scfm)
HFU-1020AN: 4.8 – 9.0 Nm3/h (2.8 – 5.3 scfm)
The maximum required air pressure during the air-scrubbing for inside
of the module will be 40 kPa (6 PSI).
At the integrity tests, such as Pressure Decay Test (PDT) or Diffusive
Air Flow (DAF) Test, keep the air pressure below 130 kPa (18.9 PSI).
Keep the source air pressure lower than 200 kPa (29 PSI), to prevent
excess air inflow. All the air used for air scrubbing and integrity testing
must be dry oil-free air.
Prohibited
!
!
Instruction
!
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Instruction
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Instruction
Prohibited
8
3. Safety Instruction for Chemical Cleaning
Take special precautions when handling chemicals during chemical
cleaning. Wear the safety gear such as safety glasses and protective
gloves. If chemicals come in direct contact with your skin or your
clothes, treat the contacted part appropriately based on the SDS.
Do not mix sodium hypochlorite with acid. Such mixture generates
toxic chlorine gas.
Stop operation whenever any anomaly occurs with the equipment or
any signs of an anomaly are observed.
In the chemical cleaning, strictly follow the procedure described in the
latter section of this manual. Otherwise you may damage the modules
or negatively affect the membrane performance.
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Instruction
Prohibited
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Instruction
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Instruction
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2
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