manualshive.com logo in svg

Toray TORAYFIL HFUG-2020AN, Instruction Manual

Share
Download
Toray TORAYFIL HFUG-2020AN Instruction Manual Download Page 24

 

 

 

22 

3. 

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.    The frequency and soaking time 
of the TMC mainly depends on the raw water quality (Normally once a day and 
each  soaking  time  are  20  minutes.    Please  contact  us  if  you  need  technical 
support.).    Fig. 5 shows a typical example of flow diagram for the TMC. 

Fig. 5    Flow diagram for the TMC 

Summary of Contents for TORAYFIL HFUG-2020AN

Page 1: ...mbrane Module TORAYFILTM Instruction Manual Model HFUG 2020AN 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 4557 Fax 81 3 3245 4913 URL www toraywater com BJAIJBAC ...

Page 2: ... 4 Safety Instruction for Disposal 9 III Specifications of Toray HFUG 2020AN Membrane Module 10 IV Configuration of Toray HFUG 2020AN 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 M...

Page 3: ...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 HFUG series Me...

Page 4: ...hlorine 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 Applicati...

Page 5: ...dous 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 expl...

Page 6: ...art 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...

Page 7: ...ng 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 Instruction Prohibited Instruction ...

Page 8: ... 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 qua...

Page 9: ...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 HFUG 2020AN 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 Diff...

Page 10: ... 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 memb...

Page 11: ...es 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 be neutralized HF gas is generated with the incineration of membrane Instruction ...

Page 12: ...particles 3 TMP Trans Membrane Pressure should be below 300 kPa 43 5 PSI at any time even during the filtration Table 2 Feed water limits 1 4 Turbidity Intermittent Peak 5 200 NTU Continuous Maximum 50 NTU TSS Intermittent Peak 5 200 mg L Continuous Maximum 50 mg L Ozone Not detected Pretreatment Filter Mesh Size Smaller than 200 micron meter Temperature Range 0 40 degree C 32 104 degree F pH Rang...

Page 13: ...Outer Surface 90 m2 969 ft2 Dimensions Diameter 216 mm 8 50 inches Length 2 160 mm 7 087 ft Weight Full of Water 92 kg 203 lbs Drained 49 kg 108 lbs Materials Housing PVC and or equivalent Potting Epoxy and or equivalent Connections Top Housing type joint 80A Bottom Housing type joint 80A Side Housing type joint 65A Operating Conditions Max Feed Water Flow 15 m3 h 66 gpm Max Backwash Flow 16 8 m3 ...

Page 14: ...12 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: ...t of Backwash Water 2 Air Outlet Backwash Water Outlet 3 Feed Water Inlet Air Inlet Drain Outlet Connections Pipe fitting outer diameter mm in Connectors 1 89 1 3 1 2 Housing type joint 80A 2 76 3 3 Housing type joint 65A 3 89 1 3 1 2 Housing type joint 80A Fig 1 Type HFUG 2020AN ...

Page 16: ...ochlorite solution 100 mg L of chlorine If this solution splashes onto your skin wash the affected part with running water If the solution gets in your eyes or mouth wash the affected part with enough amounts of running water for over 15 minutes and see the doctor immediately 4 Put the module vertically on the pedestal in the module rack Fix the module upright with the hanging hook and or the supp...

Page 17: ...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 Do not freeze the module Fig 2 Installation of the membrane module ...

Page 18: ... the instruction of the Housing Type Joints Set up Guide when using Housing Type Joints A wrong use may cause the damage to the module 6 Air inject should be located just beneath the bottom nozzle of the module to inlet air completely to the module Please refer to the below photos Also a check valve is necessary to the air piping to avoid water reverse flow Good location for air inject Poor locati...

Page 19: ...l 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 3 Make sure the filtrate water line is open Open the air exhaust valve V 4 4 Gradually open the feed water valve V 1 and charge the feed water to the module to purge any air out Fig 3 Typical example of piping ...

Page 20: ...priate volume of filtrate water flow Do not exceed 300 kPa 43 5 PSI to avoid damage to the module Operating conditions including the filtration flux and the physical cleaning should be properly set up observing the rise of trans membrane pressure Details are described in the next session Please contact us if you need technical support 7 When stopping operation gradually close the feed water valve ...

Page 21: ...inutes normally for surface water filtration Please contact us if you need technical support Fig 4 shows a typical example of the flow diagram for backwash and air scrubbing Do not carry out the backwash and the air scrubbing simultaneously since it may damage the membrane 1 Close the feed water valve V 1 and stop the feed water pump 2 Open the air exhaust valve V 4 3 Close the filtrate water valv...

Page 22: ...op the backwashing pump 5 Open the air exhaust valve V 4 and the air scrubbing valve V 2 for air scrubbing for a fixed time normally 30 seconds up to 60 seconds The air flow rate for air scrubbing should be within the range below Excessive air flow rate may damage the hollow fiber membrane HFUG 2020AN 4 8 9 0 Nm3 h normally 6 0 Nm3 h 2 8 5 3 scfm normally 3 5 scfm The maximum required air pressure...

Page 23: ... and stop the operation if abnormal water quality is detected 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: ...called Toray Maintenance Cleaning TMC The TMC is usually held following the backwash and air scrubbing which does not contain the chemical dosing The frequency and soaking time of the TMC mainly depends on the raw water quality Normally once a day and each soaking time are 20 minutes Please contact us if you need technical support Fig 5 shows a typical example of flow diagram for the TMC Fig 5 Flo...

Page 25: ...ump close the backwashing valve V 6 and stop the backwashing pump 5 Soak the membrane in the chemical for a fixed time normally 20 minutes And then open the air scrubbing valve V 2 for a fixed time normally 60 seconds The air flow rate for air scrubbing should be within the range below Excessive air flow rate may damage the hollow fiber membrane HFUG 2020AN 4 8 9 0 Nm3 h normally 6 0 Nm3 h 2 8 5 3...

Page 26: ...e required water quality 9 Make sure the air scrubbing valve V 2 and the backwashing valve V 6 are closed and the backwashing pump is stopped Constantly monitor filtrate water quality during filtration and stop the operation if abnormal water quality is detected If abnormal water quality is detected check the integrity of the element with PDT Pressure Decay Test or DAF Diffusive Air Flow Test The ...

Page 27: ...ns Membrane Pressure TMP it is necessary to involve the height difference of inlet and outlet pressure gauges Example calculation of TMP TMP Pin Hin Pout Hout 70 10 20 25 60 45 15 kPa Note the following formula may also be used TMP Pin Pout total delta H 70 20 10 25 15 kPa ...

Page 28: ... C corrected TMP with multiplying by TCF at real temperature shown in Fig 6 A filtrate flow rate measured at some real temperature can be converted to 25 degree C corrected filtrate flow rate with divided by TCF at real temperature shown in Fig 6 The equation for calculating TCF at a temperature T degree C is as follows TCF 0 0008902 0 01257187 x EXP 1 0 005806436 x 273 15 T 0 001130911 x 273 15 T...

Page 29: ... If you use the unacceptable chemicals or perform the cleaning altered from the recommended procedure the membrane could be seriously damaged Pay full attention when handling chemicals and be sure to wear the safety gear such as glasses and gloves The chemicals used for the chemical cleaning are harmful to people If chemicals directly contact your skin your eyes or other body parts take the approp...

Page 30: ... us if you need the information in detail 2 Open the chemical return valve and then open the chemical feed valve 3 Run the chemical feed pump to start the circulation of chemical and then open the chemical permeate valve to have the chemical permeate through the membrane 4 Circulate the chemical for a fixed time 5 Stop the chemical feed pump Fig 7 Flow diagram for chemical cleaning ...

Page 31: ...maged and or the life of membrane may be shortened The cleaning temperature should be 20 to 40 degree C The circulation flow rate for each type of the module is as follows HFUG 2020AN 62 5 L min 16 5 gpm Table 5 Standard conditions for chemical cleaning Pollutants Chemicals Maximum Concentration Circulation Time hr Inorganic substances Citric acid 6 3 0 wt 1 3 Organic substances Sodium hypochlorit...

Page 32: ...for rinsing and make sure that pH of the water in the module is in the range between pH 6 5 and 7 5 after rinsing Do not use any other chemicals than those indicated above Do not mix sodium hypochlorite with acid Such mixture generates toxic chlorine gas The chemical cleaning should be done at least once a year Otherwise the module filtration performance could be reduced Instruction ...

Page 33: ...rary shutdown or storage In the case of the suspension of operation for less than four days stop the feed water and keep modules full of water Keep the modules at 0 to 40 degree C If the suspension lasts for four days to less than eight days fill the module with the chemical described in Table 6 Use filtrate quality water Keep the modules at 0 to 40 degree C Table 6 Conditions for storing membrane...

Page 34: ...iod Preservative Chemical Concentration of the Chemical More than 7 days Sodium bisulfite 1 000 mg L Rinse the module thoroughly with clean water after the chemical cleaning with sodium hypochlorite and fill the module with sodium bisulfite solution Toxic chlorine gas is generated in the case of mixing sodium hypochlorite with sodium bisulfite without first flushing with water 3 Replace Preservati...

Page 35: ... 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 The content of this Instruction Manual is subject to revision from time to time Unauthorized use or reproduction of this manual is forbidden ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands