WO2018026020A1 - 分離膜モジュールの詰まり箇所特定プログラムを記録したコンピュータ読み取り可能な記録媒体、造水システム及び造水方法 - Google Patents
分離膜モジュールの詰まり箇所特定プログラムを記録したコンピュータ読み取り可能な記録媒体、造水システム及び造水方法 Download PDFInfo
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- WO2018026020A1 WO2018026020A1 PCT/JP2017/028499 JP2017028499W WO2018026020A1 WO 2018026020 A1 WO2018026020 A1 WO 2018026020A1 JP 2017028499 W JP2017028499 W JP 2017028499W WO 2018026020 A1 WO2018026020 A1 WO 2018026020A1
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- WIPO (PCT)
- Prior art keywords
- separation membrane
- membrane module
- change
- initial value
- resistance
- Prior art date
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- 239000012528 membrane Substances 0.000 title claims abstract description 347
- 238000000926 separation method Methods 0.000 title claims abstract description 310
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 172
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 129
- 238000005406 washing Methods 0.000 claims abstract description 110
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims description 93
- 238000000034 method Methods 0.000 claims description 90
- 238000004364 calculation method Methods 0.000 claims description 59
- 239000013505 freshwater Substances 0.000 claims description 42
- 239000000126 substance Substances 0.000 claims description 40
- 230000002441 reversible effect Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 13
- 239000002351 wastewater Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 10
- 238000010612 desalination reaction Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 7
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- 230000004907 flux Effects 0.000 claims description 5
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- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
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- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
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- 239000003673 groundwater Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000009285 membrane fouling Methods 0.000 description 2
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- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 241000223935 Cryptosporidium Species 0.000 description 1
- 229920001780 ECTFE Polymers 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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- 241000700605 Viruses Species 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/22—Controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
- B01D65/109—Testing of membrane fouling or clogging, e.g. amount or affinity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/24—Quality control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/48—Mechanisms for switching between regular separation operations and washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/64—Bar codes; Data storage means; RFID
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/70—Control means using a programmable logic controller [PLC] or a computer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/70—Control means using a programmable logic controller [PLC] or a computer
- B01D2313/701—Control means using a programmable logic controller [PLC] or a computer comprising a software program or a logic diagram
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/167—Use of scale inhibitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/18—Use of gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/40—Automatic control of cleaning processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention relates to a separation membrane module and a water production system for treating natural water such as river water, lake water and seawater, sewage wastewater, and industrial wastewater.
- the membrane separation method has features such as energy saving space and improved filtered water quality, and its use in various fields is expanding.
- microfiltration membranes and ultrafiltration membranes can be applied to water purification processes for producing industrial water and tap water from river water, groundwater and sewage treated water, pretreatment in seawater desalination reverse osmosis membrane treatment processes, Application to manufacturing process in the field.
- Patent Documents 1 and 2 describe that the washing time of back pressure washing is controlled according to the measured value of the membrane differential pressure during filtration, or back pressure washing.
- a method for controlling the frequency of physical cleaning such as air cleaning is proposed.
- the present invention is to provide a fresh water generation system capable of efficiently removing accumulated substances in a separation membrane module and enabling stable operation.
- the present invention has the following characteristics.
- a computer-readable recording medium recording a clogging site specifying program for a separation membrane module, which functions as a clogging site specifying means for specifying a clogging site of the separation membrane module from the filtration resistance and the resistance above the separation membrane module.
- a change amount recording means for recording the amount of change from the initial value of R1-R3, the amount of change from the initial value of R2- (R1-R3), and the amount of change from the initial value of R3;
- the change amount recording means functions as a change amount comparison means for comparing the change amounts, and the result of the change amount comparison means is that the change amount from the initial value of R1-R3 is the initial value of R2- (R1-R3).
- control a for performing air cleaning while raising and lowering the primary liquid level in the separation membrane module, control for extending the process time of the drainage process b, wherein the primary side of the separation membrane module is pressurized with air during the drainage process, and further functions as a control means for selecting at least one of the controls c for performing the pressurized drainage for drainage.
- a change rate recording means for recording the rate of change from the initial value of R1-R3, the rate of change from the initial value of R2- (R1-R3), and the rate of change from the initial value of R3;
- the change rate recording means functions as a change rate comparison means for comparing the change rates, and the result of the change rate comparison means is that the change rate from the initial value of R1-R3 is the initial value of R2- (R1-R3).
- control a for performing air cleaning while raising and lowering the liquid level on the primary side in the separation membrane module, and extending the process time of the drainage process
- Control b which further functions as a control means for selecting at least one of the controls c for pressurizing and draining the primary side of the separation membrane module with air during the drainage process
- a change amount recording means for recording the amount of change from the initial value of R1-R3, the amount of change from the initial value of R2- (R1-R3), and the amount of change from the initial value of R3;
- the change amount recording means functions as a change amount comparison means for comparing the change amounts, and the result of the change amount comparison means indicates that the change amount from the initial value of R3 is the change amount from the initial value of R1-R3 and
- the control d for supplying the treated water in the reverse direction from the nozzle for discharging the washing wastewater of the separation membrane module, the primary side of the separation membrane module After the water is discharged and emptied, the counter pressure washing pump 7 is operated to further function as a control means for selecting at least one of the controls e for washing the separation membrane module. 2) or A computer-readable recording medium according to 4).
- a change rate recording means for recording the rate of change from the initial value of R1-R3, the rate of change from the initial value of R2- (R1-R3), and the rate of change from the initial value of R3;
- the change rate recording means functions as a change rate comparison means for comparing the change rates, and the result of the change rate comparison means is that the change rate from the initial value of R3 is the change rate from the initial value of R1-R3 and R2 -When the rate of change from the initial value of (R1-R3) is greater, the control d for supplying the treated water in the reverse direction from the nozzle for discharging the washing waste water of the separation membrane module, the primary side of the separation membrane module After the water is discharged and emptied, the counter pressure washing pump 7 is operated to further function as a control means for selecting at least one of the controls e for washing the separation membrane module. (2 ) Or ( A computer-readable recording medium according to).
- a change amount recording means for recording the amount of change from the initial value of R1-R3, the amount of change from the initial value of R2- (R1-R3), and the amount of change from the initial value of R3;
- the change amount recording means functions as a change amount comparison means for comparing the change amounts, and the change amount comparison means shows that the change amount from the initial value of R2- (R1-R3) is the initial value of R1-R3.
- control f for supplying the chemical solution to the separation membrane module and cleaning the separation membrane module, back pressure washing time, and empty washing time
- control means for selecting at least one of the control g for changing at least one of the control g for changing the pressure g, the back pressure washing flow rate in the back pressure washing process, and the air amount in the empty washing process.
- a change rate recording means for recording the rate of change from the initial value of R1-R3, the rate of change from the initial value of R2- (R1-R3), and the rate of change from the initial value of R3;
- the change rate recording means functions as a change rate comparison means for comparing the change rates, and the result of the change rate comparison means is that the change rate from the initial value of R2- (R1-R3) is the initial value of R1-R3.
- control f for supplying the chemical solution to the separation membrane module and washing the separation membrane module, back pressure washing time, and empty washing time
- control means for selecting at least one of the control g for changing at least one of the control g for changing the pressure g, the back pressure washing flow rate in the back pressure washing process, and the air amount in the empty washing process.
- the computer is further operated as an operation data recording means for recording operation data of the filtration process and the cleaning process, and as a recording period setting means for setting the operation data recording period to a different period for each of the filtration process and the cleaning process.
- the computer-readable recording medium according to any one of (2) to (4), wherein the recording medium is made to function.
- the pressure data recording means for recording the pressure difference of the separation membrane module and the filtration flow rate in the filtration step of pumping the water to be treated from the primary side to the secondary side of the separation membrane module.
- Filtration flow rate data recording means prediction means for predicting the timing of chemical cleaning or replacement of the separation membrane module based on the data of the filtration flow rate data recording means or the pressure data recording means, and the filtration flow rate data recording means or Analysis means for analyzing any filtration index of filtration differential pressure change or filtration flow rate change recorded by the pressure data recording means, and filtration of either filtration pressure or filtration flow rate from the filtration index obtained by the analysis means
- the computer-readable medium according to any one of (1) to (11), further functioning as a predicting means for predicting a characteristic change. Recording medium that can be taken.
- the prediction means has a function of displaying a prediction curve as a basic graph and periodically making a new prediction according to the change in the filtration flow rate or the pressure difference.
- the computer-readable recording medium as described.
- the fresh water generation system includes a computer, and the computer includes a resistance at a lower portion of the separation membrane module, a hollow fiber membrane.
- a dewatering system characterized by identifying clogging of a separation membrane module, which functions as a clogging location identifying means for identifying a clogging location of a separation membrane module from the filtration resistance of the membrane and the resistance at the top of the separation membrane module.
- the difference in resistance between the primary side inlet side and the outlet side of the separation membrane module (first resistance R1) in the step of supplying the water to be treated to the primary side of the separation membrane module, and the water to be treated Difference in resistance between the primary side inlet and the secondary side outlet of the separation membrane module (second resistance R2) in the filtration step of pumping from the primary side to the secondary side of the separation membrane module, from the secondary side of the separation membrane module
- the first resistance obtained by the difference calculating means is caused to function as a difference calculating means for calculating a difference (third resistance R3) of the resistance on the primary side of the separation membrane module in the back pressure washing process for permeating to the primary side.
- the clogged portion of the separation membrane module is identified from the calculation of R1-R3, R2- (R1-R3) using R1, the second resistor R2, and the third resistor R3. Fresh water system.
- the difference in resistance between the primary side inlet side and the outlet side of the separation membrane module (first resistance R1), the water to be treated Difference in resistance between the primary side inlet and the secondary side outlet of the separation membrane module (second resistance R2) in the filtration step of pumping from the primary side to the secondary side of the separation membrane module, from the secondary side of the separation membrane module It is obtained by the difference calculation means by functioning as a difference calculation means for calculating the difference (third resistance R3 ′) between the secondary side and primary side resistances of the separation membrane module in the back pressure washing process for permeation to the primary side.
- the separation membrane module is clogged from the calculation of (R1 + R2) ⁇ R3 ′, (R1 + R3 ′) ⁇ R2, (R2 + R3 ′) ⁇ R1 using the first resistor R1, the second resistor R2, and the third resistor R3 ′.
- Change amount recording means for recording the change amount from the initial value of R1-R3, the change amount from the initial value of R2- (R1-R3), the change amount from the initial value of R3, and the change amount recording
- Change amount comparing means for comparing the change amounts from the means, and the result of the change amount comparison means is that the change amount from the initial value of R2- (R1-R3) is the change amount from the initial value of R1-R3 and R3
- control f for supplying a chemical solution to the separation membrane module to clean the separation membrane module
- control g for changing at least one of the back pressure washing time and the empty washing time
- g (15) or (18) characterized in that at least one of control h for changing at least one of a back pressure washing flow rate during the back pressure washing process and an air amount during the air washing process is performed.
- Fresh water system
- control f for supplying the chemical solution to the separation membrane module and cleaning the separation membrane module, the control g for changing at least one of the back pressure washing time and the empty washing time, reverse The structure according to (15) or (18), wherein at least one of control h for changing at least one of a back pressure washing flow rate during the pressure washing process and an air amount during the empty washing process is performed. Water system.
- a fresh water generation method characterized by identifying a blockage point of a module.
- the first resistance R1, the second resistance R2, and the third resistance R3 ′ are calculated based on pressure data with a permeation flow rate constant in the difference calculation, Fresh water generation method.
- the clogging location in the separation membrane module can be identified, and the separation membrane module is efficiently washed, It becomes possible to obtain treated water stably over a long period of time.
- FIG. 1 is an apparatus schematic flow diagram showing an example of a fresh water generation system and a fresh water generation method to which the present invention is applied.
- FIG. 2 is a schematic diagram showing an embodiment of the present invention.
- FIG. 3 is a schematic diagram showing an embodiment of the present invention.
- FIG. 4 is a schematic view showing an embodiment of the present invention.
- FIG. 5 is a diagram showing a prediction curve of the present invention.
- the present invention relates to a computer-readable recording medium, a fresh water generation system, and a fresh water generation method in which a program for specifying a clogged portion of a separation membrane module is recorded.
- the apparatus to which the present invention is applied includes, for example, as shown in FIG.
- a treated water supply pump 1 that supplies treated water
- a treated water supply valve 2 that is opened when the treated water is supplied
- Separation membrane module 3 for filtering treated water
- an air vent valve 4 that is opened when performing back-pressure washing or air washing
- a treated water discharge valve 5 that is opened during membrane filtration
- treated water storage for storing treated water
- a tank 6, a reverse pressure washing pump 7 that supplies the treated water to the separation membrane module 3 and performs reverse pressure washing
- a back pressure washing valve 8 that opens when the back pressure washing is performed
- the chemical solution supply pump 9 for supplying the chemical solution, the chemical solution storage tank 10 for storing the chemical solution, the air blower 11 that is an air supply source for the air cleaning of the separation membrane module 3, and the air is supplied to the lower portion of the separation membrane module 3 for air cleaning.
- An air cleaning valve 12 that is opened when the A drain valve 13 which is opened when draining the treated water or the washing waste water on the primary side of the module 3, the treated water supply valve 14 to the primary side, the treated water bypass valve 15, and the supply pressure sensor on the primary side.
- P1 16 a primary side outlet pressure sensor (P3) 17 and a secondary side pressure sensor (P2) 18 are provided.
- the water to be treated is a solution to be treated using the separation membrane module, and examples thereof include river water, groundwater, seawater, sewage treated water, factory wastewater, and culture solution.
- the pore size of the separation membrane used in the separation membrane module 3 is not particularly limited as long as it is porous, but depending on the desired property of the water to be treated and the amount of water, an MF membrane (microfiltration membrane) or a UF membrane ( Ultrafiltration membrane) is used, or both are used in combination.
- an MF membrane microfiltration membrane
- a UF membrane Ultrafiltration membrane
- either the MF membrane or the UF membrane may be used.
- the UF membrane when removing viruses or high molecular organic substances, it is preferable to use the UF membrane.
- Examples of the shape of the separation membrane include a hollow fiber membrane, a flat membrane, a tubular membrane, and a monolith membrane, and any of them may be used.
- the material of the separation membrane is polyethylene, polypropylene, polyacrylonitrile, ethylene-tetrafluoroethylene copolymer, polychlorotrifluoroethylene, polytetrafluoroethylene, polyvinyl fluoride, tetrafluoroethylene-hexafluoropropylene copolymer.
- PVDF polyvinylidene fluoride
- Polysulfone cellulose acetate
- polyvinyl alcohol polyethersulfone
- ceramics and other inorganic materials such as ceramics
- PVDF polyvinylidene fluoride
- Polyacrylonitrile from the viewpoint that the strong is more preferable.
- the separation membrane module 3 has a separation membrane inserted in the case, and has at least a treated water supply nozzle, a treated water discharge nozzle, and a treated water discharge nozzle for discharging treated water.
- the shape of the case may be either a cylindrical shape or a polygonal shape.
- the “primary side” is a side to which treated water is supplied in the space partitioned by the separation membrane, and the “secondary side” is filtered water obtained by filtering the treated water through the separation membrane. That is the side.
- the computer 21 that obtains the operation data from the fresh water generation system 20 functions as an operation data recording unit that records the operation data of the filtration process and the cleaning process, and a clogging location specifying program 22 is introduced into the computer 21.
- the treated water is supplied to the primary side in the separation membrane module 3 by operating the treated water supply pump 1 and opening the treated water supply valve 2 and the air vent valve 4.
- the pressure difference ( ⁇ P1) between the primary side inlet side and the outlet side of the separation membrane module in the process water supply step is measured and calculated by using the primary side supply pressure sensor 16 and the primary side outlet pressure sensor 17.
- the pressure data is recorded in the pressure data recording means 31-a.
- the treated water moves from the secondary side in the separation membrane module 3 to a filtration step in which the treated water is transferred to the treated water storage tank 6 through the treated water discharge valve 5.
- the air vent valve 4, the counter pressure washing valve 8, the air washing valve 12, and the drain valve 13 are all closed.
- the pressure difference between the primary side and the secondary side of the separation membrane module at the start of the filtration process (referred to as “filtration differential pressure”) ( ⁇ P2) is measured using the supply pressure sensor 16 and the secondary pressure sensor 18 on the primary side.
- the difference is calculated and recorded in the pressure data recording means 31-a.
- the filtration flow rate during the filtration step is recorded in the filtration flow rate data recording means 31-b.
- Filtration methods include total volume filtration method and cross flow filtration method.
- filtration is performed while draining a part of the water to be treated from the primary side of the separation membrane module without fully closing the air vent valve 4 during the filtration step.
- Either filtration method may be used, but a full-volume filtration module is preferred from the viewpoint of low energy consumption.
- the filtration resistance of the separation membrane that is, the filtration differential pressure ( ⁇ P2) increases with the elapsed filtration time.
- ⁇ P2 filtration differential pressure
- the filtration time is preferably set as appropriate according to the nature of the water to be treated and the membrane filtration flux. However, a method of performing physical cleaning once every filtration time of 10 to 120 minutes or a predetermined membrane filtration difference Generally, the filtration time is continued until the pressure is reached.
- the treated water supply pump 1 is stopped, the treated water supply valve 2 and the treated water discharge valve 5 are closed, the back pressure washing valve 8 and the air vent valve 4 are opened, and the back pressure washing pump 7 is operated.
- Move to the back pressure washing process. Supply the pressure difference ( ⁇ P3) between the inlet side and the outlet side of the separation membrane module at the start of the back pressure washing process or the pressure difference ( ⁇ P3 ′) between the secondary side and the primary side of the separation membrane module to the primary side.
- Measurement / difference calculation is performed using the pressure sensor 16, the secondary pressure sensor 18, and the primary outlet pressure sensor 17, and the result is recorded in the pressure data recording unit 31.
- the treated water obtained by filtering a to-be-treated water with a separation membrane module like this embodiment industrial water, purified water, Tap water, RO membrane permeate, or pure water may be used.
- the back pressure washing time is not particularly limited, but is preferably in the range of 1 to 120 seconds.
- back pressure cleaning time of one time is less than 1 second, sufficient cleaning effect cannot be obtained, and if it exceeds 120 seconds, for example, water supply process 1 minute, filtration process 30 minutes, back pressure cleaning process 5 minutes, empty washing process 1 Min, the drainage process is 1 minute, and it becomes 20% or more of the whole except for the filtration process, and the operation rate and water recovery rate of the separation membrane module are lowered.
- the back pressure cleaning pump 7 is stopped, the back pressure cleaning valve 8 is closed, the air cleaning valve 12 is opened, the air blower 11 is operated, and air is supplied to the separation membrane module 3 for cleaning. Move on to the cleaning process.
- the air washing time is not particularly limited, but is preferably in the range of 1 to 120 seconds. If the back pressure cleaning time for one time is less than 1 second, sufficient cleaning effect cannot be obtained, and if it exceeds 120 seconds, the operation rate of the separation membrane module is lowered. Further, the air cleaning valve 12 may be opened during the back pressure cleaning process, and the air blower 11 may be operated to introduce the air cleaning process.
- the air blower 11 is stopped, the air cleaning valve 12 is closed, the drain valve 13 is opened, and the process proceeds to a draining process for draining all the cleaning drainage accumulated in the separation membrane module 3. Then, it returns to a to-be-processed water supply process, and a membrane filtration operation is continued.
- the calculation method 1 includes the resistance on the primary inlet side and outlet side of the separation membrane module (first resistance R1) in the treated water supply step, and the resistance on the primary side and secondary side of the separation membrane module at the start of the filtration step. (R2-R3), R2- (R1-R3), R3 are processed using the (second resistor R2) and the primary-side resistance (third resistor R3) of the separation membrane module at the start of the back pressure cleaning process .
- the calculation method 2 uses the first resistor R1, the second resistor R2, and the resistance (third resistor R3 ′) of the secondary side inlet and the primary side outlet of the separation membrane module at the start of the back pressure cleaning process (R1 + R2).
- the calculation method 3 uses the first resistance R1, the second resistance R2, and the resistance at the primary side inlet of the separation membrane module during the drainage process (fourth resistance R4) to calculate R1-R4, R2-R4, R4. To do.
- the resistance may be calculated based on pressure data.
- the pressure difference / flow rate should be calculated.
- resistance calculation based on flow rate data and pressure data is performed, and calculation is performed with the pressure difference / flow rate of each of the treated water supply process, the filtration process, the back pressure washing process, and the drainage process. Good.
- the flow rate during the drainage process may be appropriately corrected as necessary to calculate the resistance value.
- the calculation (R1-R3), R1 + R2-R3 'or R4 indicates an increase in resistance at the treated water supply port or the lower part of the separation membrane module.
- R1 indicates the resistance at the upper and lower portions of the separation membrane module
- R3 indicates the resistance at the upper portion of the separation membrane module.
- the increase in resistance at the lower part of the separation membrane module can be calculated.
- R1 + R2-R3 ′ R1 indicates the resistance of the upper and lower portions of the separation membrane module
- R2 indicates the clogging of the lower portion of the separation membrane module and the separation membrane
- R3 ′ indicates the upper portion of the separation membrane module and the separation membrane.
- the increase in resistance at the treated water supply port or the lower part of the separation membrane module can be calculated by performing the above calculation. Since R4 indicates clogging at the lower part of the separation membrane module, the increase in resistance at the treated water supply port or at the lower part of the separation membrane module can be calculated from R4. Similarly, R3, (R1 + R3 ′)-R2 or R1-R4 is an increase in resistance at the outlet of the water to be treated or at the upper part of the separation membrane module, and R2- (R1-R3), (R1 + R3 ′)-R2 or R2-R4 is a separation membrane The increase in resistance due to clogging is shown, and the clogged portion in the separation membrane module can be specified by performing the above calculation.
- the frequency of the calculation is not particularly limited, but may be performed every filtration cycle.
- the upper part of the separation membrane module indicates a portion of 70% or more from the treated water supply side with respect to the length direction of the separation membrane module, and the upper part of the separation membrane module means the separation membrane module. A portion of 30% or less from the treated water supply side with respect to the length direction.
- the treated water supply side is often on the lower side with respect to the direction of gravity.
- the change amount from the initial value of the value obtained by the above calculation is recorded in the change amount recording unit 34-a, and the change amount from the initial value of the lower resistance of the separation membrane module is determined by the change amount comparison unit 35-a.
- the clogging location specifying means 33 and / or the treated water supply port It is necessary to judge that the lower part of the separation membrane module is a clogged part and to wash the lower part of the separation membrane module more intensively than other parts.
- the air release valve 4 and the drain valve 13 are opened by the control means 36, the water level is lowered until the gas around the separation membrane on the primary side becomes gas, the drain valve 13 is closed, and the counter pressure cleaning is performed.
- Control a for performing air cleaning while opening the valve 8 and the air cleaning valve 12 and raising and lowering the liquid level on the primary side
- control b for increasing the process time of the drainage process
- Pressurized drainage that pressurizes the primary side with air, or closes the air vent valve 4, closes the backwash valve 8 and drain valve 13, operates the backwash pump 7, and backwashes the backwash that drains It is effective to implement at least one of the controls c for performing the above.
- Each control may be performed only once or may be performed a plurality of times.
- the control a can provide the effect of eliminating bubbles at the gas-liquid interface and the effect of cleaning due to the large fluctuation of the liquid level due to the bursting of the bubbles, and can efficiently clean the treated water supply port and / or the lower part of the separation membrane module.
- the initial value is the value at the start of filtration cycle operation, at the start of operation after chemical cleaning, or at the time of the previous calculation process.
- the change rate is recorded in the change rate recording means 34-b as shown in FIG. 3 instead of the change amount from the initial value of the value obtained by the above calculation, and the respective change rates are mutually changed.
- the comparison may be performed using the comparison unit 35-b.
- the change amount from the initial value of the value obtained by the above calculation is recorded in the change amount recording means 34-a, and the change amount from the initial value of the separation membrane module upper resistance is separated by the change amount comparison means 35-a.
- the amount of change from the initial value of the lower resistance of the membrane module module is compared with the amount of change from the initial value of resistance due to clogging of the separation membrane module. It is necessary to determine that the upper part of the separation membrane module is a clogged part and to wash the upper part of the separation membrane module more carefully than other parts.
- the control means 36 opens the treated water bypass valve 15, the air vent valve 4, and the drain valve 13, and supplies the treated water in the reverse direction from the nozzle that discharges the washed waste water. 13 is opened, the air vent valve 4 is opened and the water on the primary side of the separation membrane module is discharged to make it empty. Then, the back pressure washing valve 8 is opened and the drain valve 13 is kept open. It is effective to execute at least one of the controls e for operating the pump 7 and cleaning the separation membrane module.
- the control d is preferably supplied with water to be treated as in this embodiment, but treated water, industrial water, tap water, or RO membrane permeate may be used.
- the outlet of the water to be treated and / or the upper part of the separation membrane module can be efficiently washed.
- the change rate is recorded in the change rate recording means 34-b as shown in FIG. 3 instead of the change amount from the initial value of the value obtained by the above calculation, and the respective change rates are mutually changed.
- the comparison may be performed using the comparison unit 35-b.
- the change amount from the initial value of the value obtained by the above calculation is recorded in the change amount recording means 34-a, and the initial value of the resistance due to clogging of the separation membrane of the separation membrane module is recorded by the change amount comparison means 35-a. If the change amount from the initial value of the separation membrane module upper resistance is larger than the change amount from the initial value of the separation membrane module upper resistance, and the change amount is the largest, Therefore, it is necessary to intensively clean the separation membrane of the separation membrane module as compared with other portions.
- control means 36 operates the chemical liquid supply pump 9 during the back pressure cleaning process to perform the chemical liquid reinforced cleaning for supplying the chemical liquid to the separation membrane module 3 from the secondary side, the counter pressure cleaning time, It is effective to implement at least one of the control g for changing at least one of the washing times, the backwash flow rate during the backwashing process, and the control h for changing at least one of the air amounts during the washing process. It is.
- the change rate is recorded in the change rate recording means 34-b as shown in FIG. 3 instead of the change amount from the initial value of the value obtained by the above calculation, and the respective change rates are mutually changed.
- the comparison may be performed using the comparison unit 35-b.
- a time for contacting the chemical solution and the separation membrane may be provided. The contact time is preferably about 5 minutes to 3 hours. If the length is too long, the time for stopping the fresh water generation system 20 becomes longer, and the operation efficiency of the fresh water generation system 20 decreases.
- the chemical solution used for cleaning can be selected after appropriately setting the concentration and the contact time so that the film does not deteriorate, but at least sodium hypochlorite, chlorine dioxide, hydrogen peroxide, ozone, etc. It is preferable to contain one or more because the cleaning effect on the organic matter is high, and one containing at least one of hydrochloric acid, sulfuric acid, nitric acid, citric acid, oxalic acid and the like is preferable for aluminum, iron, manganese, etc. On the other hand, the cleaning effect is high, which is preferable.
- the chemical concentration is preferably 5 mg / L to 10000 mg / L.
- the cleaning effect is not sufficient, and if it becomes thicker than 100,000 mg / L, the cost of the chemical becomes high and it becomes uneconomical.
- the chemical solution may be supplied to the separation membrane module 3 from the primary side. The clogging of the separation membrane can be efficiently cleaned by performing the chemical solution strengthened cleaning.
- the recording cycle of the recording cycle setting means may be arbitrarily set in units of several tens of seconds to several hours in the filtration process, but is preferably set to be 1 minute or longer in order to prevent the server capacity from being compressed. .
- the washing time itself is shorter than that in the filtration process, and data cannot be acquired in the same recording cycle as the filtration process. Therefore, it is preferable to set the unit for several seconds to several tens of seconds. It is more preferable to set it to 5 seconds or less for data analysis for identifying a clogged portion.
- the computer 21 is further set as a management program 23 having lower means. It has an analysis means 37 for analyzing a filtration index from a filtration differential pressure ( ⁇ P2) change and a filtration flow rate change, has a function of analyzing past data, and a past change of each data from a filtration index obtained by the analysis means. Filtration characteristic change predicting means 38 for calculating the minute and predicting the rate of change of filtration characteristics such as filtration flow rate and filtration pressure is provided. Thereby, the time until the separation membrane module 3 reaches the chemical cleaning or the time until the replacement can be predicted by the chemical cleaning date or the replacement date predicting means 39.
- ⁇ P2 filtration differential pressure
- the filtration index is a degree of increase in filtration resistance in one cycle and an increase in physical filtration irreversible filtration resistance after the completion of the physical washing.
- the degree of increase in filtration resistance in one cycle refers to the filtration resistance that increases in one cycle of the filtration process
- the filtration resistance is an index that indicates the degree of membrane fouling, calculated by the following calculation formula.
- Filtration resistance (1 / m) filtration differential pressure (Pa) / (filtrated water viscosity (Pa ⁇ s) ⁇ filtration flux (m / s))
- the total water filtration (m 3 / M 2 ) is the horizontal axis, and when the filtration resistance (1 / m) is plotted on the vertical axis, it indicates the slope of a straight line connecting the filtration resistance at the start of each filtration step.
- the operating condition of the separation membrane module 3 can be easily determined by displaying the prediction curve output by the prediction means in a graph.
- the prediction is preferably newly predicted periodically according to the change in the filtration flow rate data or the pressure data. The period is not particularly limited, but is preferably about once every several hours to several days.
- each of the recording means may record not only the posted name data itself but also other information capable of calculating the posted name data.
- the “change rate recording means” not only records the rate of change itself, but also records the rate of change and the amount of change between them, so the rate of change can be calculated from these. , Change rate recording means.
Abstract
Description
なお上記各記録手段は、掲記した名称のデータそのものを記録するものだけでなく、掲記した名称のデータを算出可能な他の情報を記録するものであってもよい。たとえば、「変化率記録手段」は変化率そのものを記録するものだけでなく、時間的な測定間隔とその間の変化量を記録するものであっても、これらから変化率を算出することができるので、変化率記録手段とすることができる。
2:被処理水供給弁
3:分離膜モジュール
4:エア抜き弁
5:処理水排出弁
6:処理水貯留槽
7:逆圧洗浄ポンプ
8:逆圧洗浄弁
9:薬液供給ポンプ
10:薬液貯留槽
11:エアブロワー
12:空気洗浄弁
13:排水弁
14:処理水供給弁
15:被処理水バイパス弁
16:1次側の供給圧力センサ(P1)
17:1次側の出口圧力センサ(P3)
18:2次側圧力センサ(P2)
20:造水システム
21:コンピュータ
22:詰まり箇所特定プログラム
23:管理プログラム
31-a:圧力データ記録手段
31-b:ろ過流速データ記録手段
32:差分演算手段
33:詰まり箇所特定手段
34-a:変化量記録手段
34-b:変化率記録手段
35-a:変化量比較手段
35-b:変化率比較手段
36:制御手段
37:解析手段
38:ろ過特性変化予測手段
39:薬品洗浄日または交換日予測手段
Claims (31)
- 被処理水を分離膜を有する分離膜モジュールによってろ過し、処理水を得る造水システムにおける分離膜モジュールの詰まり箇所を特定するため、コンピュータを、分離膜モジュール下部の抵抗、中空糸膜のろ過抵抗、分離膜モジュール上部の抵抗から分離膜モジュールの詰まり箇所を特定する詰まり箇所特定手段として機能させることを特徴とする、分離膜モジュールの詰まり箇所特定プログラムを記録したコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの2次側から1次側へ透過させる逆圧洗浄工程における分離膜モジュールの1次側の抵抗の差分(第3抵抗R3)を演算する差分演算手段と、前記差分演算手段で得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3を用いR1-R3、R2-(R1-R3)の演算から前記分離膜モジュールの詰まり箇所を特定する詰まり箇所特定手段として機能させることを特徴とする、請求項1に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの2次側から1次側へ透過させる逆圧洗浄工程における分離膜モジュールの2次側と1次側の抵抗の差分(第3抵抗R3’) を演算する差分演算手段と、前記差分演算手段で得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3’を用い(R1+R2)-R3’、(R1+R3’)-R2、(R2+R3’)-R1の演算から前記分離膜モジュールの詰まり箇所を特定する詰まり箇所特定手段として機能させることを特徴とする、請求項1に記載のコンピュータ読み取り可能な記録媒体。
- 前記差分演算手段が圧力データを用いることを特徴とする、請求項2または3に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、R1-R3の初期値からの変化量、R2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量を記録する変化量記録手段と、前記変化量記録手段から変化量を比較する変化量比較手段として機能させるとともに、前記変化量比較手段の結果が、R1-R3の初期値からの変化量がR2-(R1-R3)の初期値からの変化量およびR3の初期値からの変化量よりも大きい場合、前記分離膜モジュール内の1次側の液面を上下させつつ空気洗浄を行う制御a、排水工程の工程時間を長くする制御b、排水工程時に分離膜モジュールの1次側をエアにより加圧し、排水する加圧排水を行う制御cの少なくとも一つを選択する制御手段、としてさらに機能させることを特徴とする、請求項2または4に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、R1-R3の初期値からの変化率、R2-(R1-R3)の初期値からの変化率、R3の初期値からの変化率を記録する変化率記録手段、前記変化率記録手段から変化率を比較する変化率比較手段として機能させるとともに、前記変化率比較手段の結果が、R1-R3の初期値からの変化率がR2-(R1-R3)の初期値からの変化率およびR3の初期値からの変化率よりも大きい場合、前記分離膜モジュール内の1次側の液面を上下させつつ空気洗浄を行う制御a、排水工程の工程時間を長くする制御b、排水工程時に分離膜モジュールの1次側をエアにより加圧し、排水する加圧排水を行う制御cの少なくとも一つを選択する制御手段、としてさらに機能させることを特徴とする、請求項2または4に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、R1-R3の初期値からの変化量、R2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量を記録する変化量記録手段と、前記変化量記録手段から変化量を比較する変化量比較手段として機能させるとともに、前記変化量比較手段の結果が、R3の初期値からの変化量が、R1-R3の初期値からの変化量およびR2-(R1-R3)の初期値からの変化量よりも大きい場合、前記分離膜モジュールの洗浄排水を排出するノズルから逆方向に被処理水を供給する制御d、分離膜モジュールの1次側の水を排出し空の状態とした後に、逆圧洗浄ポンプ7を稼働し、分離膜モジュールを洗浄する制御eの少なくとも一つを選択する制御手段、としてさらに機能させることを特徴とする、請求項2または4に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、R1-R3の初期値からの変化率、R2-(R1-R3)の初期値からの変化率、R3の初期値からの変化率を記録する変化率記録手段と、前記変化率記録手段から変化率を比較する変化率比較手段として機能させるとともに、前記変化率比較手段の結果が、R3の初期値からの変化率がR1-R3の初期値からの変化率およびR2-(R1-R3)の初期値からの変化率よりも大きい場合、前記分離膜モジュールの洗浄排水を排出するノズルから逆方向に被処理水を供給する制御d、分離膜モジュールの1次側の水を排出し空の状態とした後に、逆圧洗浄ポンプ7を稼働し、分離膜モジュールを洗浄する制御eの少なくとも一つを選択する制御手段、としてさらに機能させることを特徴とする、請求項2または4に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、R1-R3の初期値からの変化量、R2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量を記録する変化量記録手段と、前記変化量記録手段から変化量を比較する変化量比較手段として機能させるとともに、前記変化量比較手段の結果が、R2-(R1-R3)の初期値からの変化量がR1-R3の初期値からの変化量およびR3の初期値からの変化量よりも大きい場合、分離膜モジュールに薬液を供給して分離膜モジュールの洗浄を実施する制御f、逆圧洗浄時間、空洗時間の少なくとも一つを変更する制御g、逆圧洗浄工程時の逆圧洗浄流量、空洗工程時のエア量の少なくとも一つを変更する制御hの少なくとも一つを選択する制御手段、としてさらに機能させることを特徴とする、請求項2または4に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、R1-R3の初期値からの変化率、R2-(R1-R3)の初期値からの変化率、R3の初期値からの変化率を記録する変化率記録手段と、前記変化率記録手段から変化率を比較する変化率比較手段として機能させるとともに、前記変化率比較手段の結果が、R2-(R1-R3)の初期値からの変化率がR1-R3の初期値からの変化率およびR3の初期値からの変化率よりも大きい場合、分離膜モジュールに薬液を供給して分離膜モジュールの洗浄を実施する制御f、逆圧洗浄時間、空洗時間の少なくとも一つを変更する制御g、逆圧洗浄工程時の逆圧洗浄流量、空洗工程時のエア量の少なくとも一つを変更する制御hの少なくとも一つを選択する制御手段、としてさらに機能させることを特徴とする、請求項2または4に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、前記ろ過工程および洗浄工程の運転データを記録する運転データ記録手段と、前記ろ過工程と前記洗浄工程それぞれに運転データの記録周期を異なる周期に設定する記録周期設定手段としてさらに機能させることを特徴とする、請求項2から4のいずれか1項に記載のコンピュータ読み取り可能な記録媒体。
- 前記コンピュータを、さらに分離膜モジュールの圧力差を記録する圧力データ記録手段と、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程におけるろ過流速を記録しておくろ過流速データ記録手段と、前記ろ過流速データ記録手段または前記圧力データ記録手段のデータに基づいて分離膜モジュールを薬品洗浄または交換する時期を予測する予測手段と、前記ろ過流速データ記録手段または前記圧力データ記録手段で記録したろ過差圧変化、ろ過流速変化のいずれかのろ過指標を解析する解析手段と、前記解析手段で得られたろ過指標から、ろ過圧力、ろ過流速のいずれかのろ過特性変化を予測する予測手段としてさらに機能させることを特徴とする、請求項1から11のいずれか1項に記載のコンピュータ読み取り可能な記録媒体。
- 前記予測手段が基本となる予測曲線をグラフ表示するとともに、前記ろ過流速または前記圧力差の変化に応じて、周期的に新規予測する機能を有することを特徴とする、請求項12に記載のコンピュータ読み取り可能な記録媒体。
- 前記予測手段で計算された前記分離膜の薬品洗浄日または交換日までの日数が指定日数以下となった場合に通知アラームを出力する通知手段として機能させることを特徴とする、請求項12または13に記載のコンピュータ読み取り可能な記録媒体。
- 被処理水を分離膜を有する分離膜モジュールによってろ過し、処理水を得る造水システムにおいて、前記造水システムはコンピュータを備え、前記コンピュータを、分離膜モジュール下部の抵抗、中空糸膜のろ過抵抗、分離膜モジュール上部の抵抗から分離膜モジュールの詰まり箇所を特定する詰まり箇所特定手段として機能させることを特徴とする、分離膜モジュールの詰まり特定することを特徴とする造水システム。
- 前記コンピュータを、分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの2次側から1次側へ透過させる逆圧洗浄工程における分離膜モジュールの1次側の抵抗の差分(第3抵抗R3)を演算する差分演算手段として機能させ、前記差分演算手段で得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3を用いR1-R3、R2-(R1-R3)の演算から前記分離膜モジュールの詰まり箇所を特定することを特徴とする、請求項15に記載の造水システム。
- 前記コンピュータを、分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの2次側から1次側へ透過させる逆圧洗浄工程における分離膜モジュールの2次側と1次側の抵抗の差分(第3抵抗R3’) を演算する差分演算手段として機能させ、前記差分演算手段で得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3’を用い(R1+R2)-R3’、(R1+R3’)-R2、(R2+R3’)-R1の演算から前記分離膜モジュールの詰まり箇所を特定することを特徴とする、請求項15に記載の造水システム。
- 前記差分演算手段が圧力データを用いることを特徴とする、請求項16または17に記載の造水システム。
- R1-R3の初期値からの変化量、R2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量を比較した結果が、R1-R3の初期値からの変化量がR2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量と比べて最も大きい場合、前記分離膜モジュール内の1次側の液面を上下させつつ空気洗浄を行う制御a、排水工程の工程時間を長くする制御b、排水工程時に分離膜モジュールの1次側をエアにより加圧し、排水する加圧排水を行う制御cの少なくとも一つを実施する事を特徴とする、請求項15または18に記載の造水システム。
- R1-R3の初期値からの変化率、R2-(R1-R3)の初期値からの変化率、R3の初期値からの変化率を比較した結果が、R1-R3の初期値からの変化率がR2-(R1-R3)の初期値からの変化率およびR3の初期値からの変化率よりも大きい場合、前記分離膜モジュール内の1次側の液面を上下させつつ空気洗浄を行う制御a、排水工程の工程時間を長くする制御b、排水工程時に分離膜モジュールの1次側をエアにより加圧し、排水する加圧排水を行う制御cの少なくとも一つを実施する事を特徴とする、請求項15または18に記載の造水システム。
- R1-R3の初期値からの変化量、R2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量を比較した結果が、R3の初期値からの変化量が、R1-R3の初期値からの変化量およびR2-(R1-R3)の初期値からの変化量よりも大きい場合、前記分離膜モジュールの洗浄排水を排出するノズルから逆方向に被処理水を供給する制御d、分離膜モジュールの1次側の水を排出し空の状態とした後に、逆圧洗浄ポンプ7を稼働し、分離膜モジュールを洗浄する制御eの少なくとも一つを実施する事を特徴とする、請求項15または18に記載の造水システム。
- R1-R3の初期値からの変化率、R2-(R1-R3)の初期値からの変化率、R3の初期値からの変化率を比較した結果が、R3の初期値からの変化率がR1-R3の初期値からの変化率およびR2-(R1-R3)の初期値からの変化率よりも大きい場合、前記分離膜モジュールの洗浄排水を排出するノズルから逆方向に被処理水を供給する制御d、分離膜モジュールの1次側の水を排出し空の状態とした後に、逆圧洗浄ポンプ7を稼働し、分離膜モジュールを洗浄する制御eの少なくとも一つを実施する事を特徴とする、請求項15または18に記載の造水システム。
- R1-R3の初期値からの変化量、R2-(R1-R3)の初期値からの変化量、R3の初期値からの変化量を記録する変化量記録手段と、前記変化量記録手段から変化量を比較する変化量比較手段を備え、前記変化量比較手段の結果が、R2-(R1-R3)の初期値からの変化量がR1-R3の初期値からの変化量およびR3の初期値からの変化量よりも大きい場合、分離膜モジュールに薬液を供給して分離膜モジュールの洗浄を実施する制御f、逆圧洗浄時間、空洗時間の少なくとも一つを変更する制御g、逆圧洗浄工程時の逆圧洗浄流量、空洗工程時のエア量の少なくとも一つを変更する制御hの少なくとも一つを実施する事を特徴とする、請求項15または18に記載の造水システム。
- R1-R3の初期値からの変化率、R2-(R1-R3)の初期値からの変化率、R3の初期値からの変化率を記録する変化率記録手段、前記変化率記録手段から変化率を比較する変化率比較手段を備え、前記変化率比較手段の結果が、R2-(R1-R3)の初期値からの変化率がR1-R3の初期値からの変化率およびR3の初期値からの変化率よりも大きい場合、分離膜モジュールに薬液を供給して分離膜モジュールの洗浄を実施する制御f、逆圧洗浄時間、空洗時間の少なくとも一つを変更する制御g、逆圧洗浄工程時の逆圧洗浄流量、空洗工程時のエア量の少なくとも一つを変更する制御hの少なくとも一つを実施する事を特徴とする、請求項15または18に記載の造水システム。
- 被処理水を分離膜を有する分離膜モジュールによってろ過し、処理水を得る造水システムにおいて、分離膜モジュール下部の抵抗、中空糸膜のろ過抵抗、分離膜モジュール上部の抵抗から分離膜モジュールの詰まり箇所を特定することを特徴とする造水方法。
- 分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの2次側から1次側へ透過させる逆圧洗浄工程における分離膜モジュールの1次側の抵抗の差分(第3抵抗R3)を演算し、前記演算により得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3を用いR1-R3、R2-(R1-R3)の演算から前記分離膜モジュールの詰まり箇所を特定することを特徴とする、請求項25に記載の造水方法。
- 被処理水を分離膜を有する分離膜モジュールによってろ過し、処理水を得る造水方法において、分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの2次側から1次側へ透過させる逆圧洗浄工程における分離膜モジュールの2次側と1次側の抵抗の差分(第3抵抗R3’) を演算し、前記演算により得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3’を用い(R1+R2)-R3’、(R1+R3’)-R2、(R2+R3’)-R1の演算から前記分離膜モジュールの詰まり箇所を特定することを特徴とする、請求項25に記載の造水方法。
- 被処理水を分離膜を有する分離膜モジュールによってろ過し、処理水を得る造水方法において、分離膜モジュールの1次側に被処理水を供給する工程における分離膜モジュールの1次側入口側と出口側の抵抗の差分(第1抵抗R1)、被処理水を分離膜モジュールの1次側から2次側へと圧送するろ過工程における分離膜モジュールの1次側入口と2次側出口の抵抗の差分(第2抵抗R2)、分離膜モジュールの1次側の水を排水する排水工程における排水時間により算出する1次側の抵抗(第3抵抗R4)を演算し、前記演算により得られた前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R4を用いR1-R4、R2-R4の演算から前記分離膜モジュールの詰まり箇所を特定することを特徴とする、請求項25に記載の造水方法。
- 前記差分演算においてが透過流束を一定とし圧力データに基づいて前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3を算出することを特徴とする、請求項26に記載の造水方法。
- 前記差分演算においてが透過流束を一定とし圧力データに基づいて前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R3’を算出することを特徴とする、請求項27に記載の造水方法。
- 前記差分演算においてが透過流束を一定とし圧力データに基づいて前記第1抵抗R1、前記第2抵抗R2、前記第3抵抗R4を算出することを特徴とする、請求項28に記載の造水方法。
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JP7052926B1 (ja) * | 2020-07-31 | 2022-04-12 | 東レ株式会社 | 分離膜モジュールの運転方法、プログラムを記録したコンピュータ読み取り可能な記録媒体及び造水システム |
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US11141701B2 (en) | 2021-10-12 |
KR20190033550A (ko) | 2019-03-29 |
CN109562965B (zh) | 2021-11-26 |
US20190184343A1 (en) | 2019-06-20 |
JP6607319B2 (ja) | 2019-11-20 |
CN109562965A (zh) | 2019-04-02 |
KR102329058B1 (ko) | 2021-11-19 |
JPWO2018026020A1 (ja) | 2019-01-31 |
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