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Toray TORAYFIL HFU AN Series Instruction Manual

Pressurized pvdf hollow fiber membrane module
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Issued in December 2018
TORAY Pressurized PVDF Hollow Fiber
TM
Membrane Module "TORAYFIL
"
Instruction Manual
Model: "HFU series"
(type AN)
Toray Industries, Inc.
Issued by
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

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Summary of Contents for Toray TORAYFIL HFU AN Series

  • Page 1 Issued in December 2018 TORAY Pressurized PVDF Hollow Fiber Membrane Module "TORAYFIL " Instruction Manual Model: "HFU series" (type AN) Toray Industries, Inc. Issued by 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...

  • Page 2: Table Of Contents

    Content 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.

  • Page 3: Introduction

    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...

  • Page 4: About "Type An

    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 ...

  • Page 5: For Your Safety

    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.

  • Page 6: Safety Instruction For Unpacking And Installation

    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, Instruction wash the affected part with running water.
  • Page 7 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 Instruction connections may damage the modules. Keep the connection surface free of any dirt or oils. Prohibited Be sure to install the modules vertically for effective air scrubbing.

  • Page 8: Safety Instruction For Filtration Operation

    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. Instruction Confirm that the preservative chemical in the modules is completely drained out before starting the filtration operation.
  • Page 9 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 Prohibited temperature damages the modules. Do not freeze the membrane modules. Prohibited The operating conditions, including the filtration flux and the periodical physical cleaning, must be properly set-up otherwise the trans-...

  • Page 10: Safety Instruction For Chemical Cleaning

    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 Instruction clothes, treat the contacted part appropriately based on the SDS. Do not mix sodium hypochlorite with acid.

  • Page 11: Safety Instruction For Disposal

    4. Safety Instruction for Disposal When dispose the modules, please apply a service of a qualified waste disposing company. When the module is to be incinerated, please apply the appropriate facilities in which hydrogen fluoride (HF) gas can Instruction be neutralized. HF gas is generated with the incineration of membrane.

  • Page 12: Specifications Of Toray "Hfu Series" Membrane Module

    III. Specifications of Toray "HFU series" Membrane Module Table 1. Specifications of membrane * Membrane Material PVDF (Polyvinylidene fluoride) Nominal Pore Size 0.01 micron Maximum * 300 kPa (43.5 PSI) Trans-Membrane Pressure Normal Operation Lower than 200 kPa (29.0 PSI) Storage and Operating 0 –...
  • Page 13 Table 3. Cleaning limits * Cleaning pH Range 0 – 12 0 – 40 degree C Cleaning Temperature Range (32 – 104 degree F) Maximum Concentration of NaClO as Cl 3,000 mg/L (10 < pH < 12) Maximum NaClO Exposure 1,000,000 mg/L hours (lifetime contact time) as Cl Maximum Acid Contact Time...
  • Page 14  Handle and operate the modules within the ranges and the limits indicated in Table 1 to 4. Operation out of these ranges or limits may damage the modules, and affect filtration performance.

  • Page 15: Configuration Of Toray "Hfu Series" Membrane Module

    IV. Configuration of Toray "HFU series" Membrane Module (type AN) (1): Filtrate Outlet / Inlet of Backwash Water (2): Air Outlet / Backwash Water Outlet (3): Feed Water Inlet / Air Inlet / Drain Outlet Connections Pipe fitting outer diameter...

  • Page 16: Installation

    Installation The standard method to install the membrane modules is described below. 1. Unpack the membrane module from wooden box or corrugated box. 2. Remove plugging plate from each nozzle of the module. 3. Drain out the preservative solution from the module. ...
  • Page 17  Be careful not to install the module upside down. Confirm the module is installed in the right direction. Do not overtighten the module with the hanging  hook and/or the supporting belt, or you may damage the module.  Do not allow the hollow fiber membranes to dry even for a few hours, especially in summer.
  • Page 18 5. Connect the piping to each connection point of the module with Housing type joints (HFU-2020AN, HFU-1020AN) (see Fig. 4). The maximum fastening power of the Housing type joints should not exceed 40 Nm. When you tighten or loosen the Housing type joints, make certain to maintain sufficient space prior to the work and be careful not to be wounded by swinging out or clipping your fingers.

  • Page 19: Operation

    VI. Operation 1. Filtration (1) Check that all piping is connected appropriately and flushed out prior to the operation. Fig. 4 shows a typical example of piping. Fig. 4 Typical example of piping (2) Make sure the feed water valve (V-1), the drainage valve (V-3) and the valve for the scrubbing air (V-2) are “closed”.
  • Page 20  Do not open the feed water valve (V-1) quickly, or water-hammer may occur and the module could be damaged. (5) Confirm that the air is out of the module, and then close the air exhaust valve (V-4). (6) Set appropriate volume of filtrate water flow. ...

  • Page 21: Backwash And Air-Scrubbing

    2. Backwash and Air-scrubbing The physical cleaning with backwash followed by air-scrubbing should be carried out periodically and automatically for the continuous filtration. The frequency of the physical cleaning mainly depends on the raw water quality (Typical frequency is once every 30 minutes normally for surface water filtration. Please contact us if you need technical support.).
  • Page 22 module. During backwash, chemical feed pump can be operated to dose chemical to the backwash water. The dosing chemical is usually sodium hypochlorite and the dosing ratio should be up to 50 mg/L as Cl The flow rate of backwash water is set up in advance for 1.0 to 1.5 times filtrate water flow rate (Do not exceed Max.
  • Page 23 If abnormal water quality is detected, check the integrity of the element with PDT (Pressure Decay Test) or DAF (Diffusive Air Flow) Test. The test procedure is provided as the technical information by Toray.

  • Page 24: Toray Maintenance Cleaning

    Instead of chemical dosing for every backwash, soaking the membrane to chemical solution several tens of minutes a day is also effective for membrane performance retention. This process is called Toray Maintenance Cleaning (TMC). The TMC is usually held following the backwash and air-scrubbing which does not contain the chemical dosing.
  • Page 25 filtrate water flow rate (Do not exceed Max. Backwash Flow described in Table 4). (3) As soon as the NaClO is detected in the drainage water, close the drainage valve (V-3). (4) After making sure water comes out from upper part of the side nozzle of the membrane module, stop the NaClO feed pump, close the backwashing valve (V-6) and stop the backwashing pump.
  • Page 26 If abnormal water quality is detected, check the integrity of the element with PDT (Pressure Decay Test) or DAF (Diffusive Air Flow) Test. The test procedure is provided as the technical information by Toray.

  • Page 27: Basic Trans-Membrane Pressure Calculation

    4. Basic Trans-Membrane Pressure Calculation To calculate accurate Trans-Membrane Pressure (TMP), it is necessary to involve the height difference of inlet and outlet pressure gauges. Example calculation of TMP TMP = (P ) - (P = (70 - 10) - (20 + 25) = 60 - 45 = 15 kPa Note, the following formula may also be used:...

  • Page 28: Temperature Correction Factor

    5. Temperature Correction Factor The permeability of the membrane is influenced by temperature mainly because the water viscosity changes with temperature. When you evaluate the permeability correctly, you need to eliminate the temperature effect with the temperature correction factor (TCF) shown in Fig. 7. A Trans-Membrane Pressure (TMP) measured at some real temperature can be converted to 25 degree C corrected TMP with multiplying by TCF at real temperature shown in Fig.

  • Page 29: Chemical Cleaning

    VII. Chemical Cleaning The chemical cleaning should be carried out to remove foulants accumulated in the membrane pores or sticking to the membrane surface.  Carry out the chemical cleaning before the trans- membrane pressure rises up to 200 kPa (29.0 PSI), or the module filtration performance could be reduced significantly.
  • Page 30 Fig. 8 Flow diagram for chemical cleaning (1) The flow diagram for cleaning simultaneously both outer surface and inside of hollow fiber membranes is shown in Fig. 8. The flow diagram can be changed case by case. Please contact us if you need the information in detail.
  • Page 31 membrane. (4) Circulate the chemical for a fixed time. (5) Stop the chemical feed pump. (6) Drain the chemical and rinse the cleaning line and the module thoroughly with product water.  Take appropriate measures to prevent the mis- operation or accidents that could cause the chemicals to get into the product water.
  • Page 32 *6): Besides citric acid, hydrochloric acid (with the maximum concentration of 1.0 mol/L), oxalic acid (with the maximum concentration of 1.0 wt%), sulfuric acid (with the maximum concentration of 0.05 mol/L) and nitric acid (with the maximum concentration of 0.1 mol/L) are acceptable. ...

  • Page 33: Storage Of Membrane Module

    VIII. Storage of Membrane Module Follow the instruction below when you store the modules.  Be careful not to freeze the modules. 1. Storage of New Membrane Modules Keep the modules in the original packing in a dark and cool place (0 to 40 degree Avoid direct sunlight and moisture.

  • Page 34: Replace Preservative Chemical

    (2) Long term storage First carry out a chemical cleaning with sodium hypochlorite. Fill the module with the chemical described in Table 7. Use filtrate quality water. Follow the instructions shown in Table 7. Keep the modules sealed with the aqueous chemical solution shown in Table 6 or Table 7.
  • Page 35 This Instruction Manual does not intend to guarantee the results of application of the information provided herein or the safety and the compatibility of this product. Before using this product, the user is asked to check for its safety and compatibility with the intended purpose.

This manual is also suitable for:

Torayfil hfu-2020anTorayfil hfu-1020an

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