WO2017204054A1 - Appareil à membrane à osmose inverse et procédé de fonctionnement d'appareil à membrane à osmose inverse - Google Patents

Appareil à membrane à osmose inverse et procédé de fonctionnement d'appareil à membrane à osmose inverse Download PDF

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Publication number
WO2017204054A1
WO2017204054A1 PCT/JP2017/018531 JP2017018531W WO2017204054A1 WO 2017204054 A1 WO2017204054 A1 WO 2017204054A1 JP 2017018531 W JP2017018531 W JP 2017018531W WO 2017204054 A1 WO2017204054 A1 WO 2017204054A1
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Prior art keywords
reverse osmosis
osmosis membrane
water
cleaning
bank
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English (en)
Japanese (ja)
Inventor
清一 中村
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Nomura Micro Science Co Ltd
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Nomura Micro Science Co Ltd
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    • 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
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/12—Controlling or regulating
    • 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
    • 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

Definitions

  • the present invention relates to a reverse osmosis membrane device and a method for operating a reverse osmosis membrane device.
  • a reverse osmosis membrane device generally includes a reverse osmosis membrane module including a reverse osmosis membrane module formed in a hollow fiber shape, a spiral shape, a flat plate shape, a tube shape, and the like, and a reverse osmosis membrane vessel composed of a structure supporting the reverse osmosis membrane module.
  • a plurality of reverse osmosis membrane banks are provided.
  • Turbidity, fine particles, microorganisms, scale components, etc. adhering to the surface of the reverse osmosis membrane are removed by washing the reverse osmosis membrane module.
  • the reverse osmosis membrane module is generally cleaned by chemical cleaning when the water flow differential pressure increases or the permeated water amount decreases.
  • There is also a method of passing raw water from the brine side to the water supply side see, for example, Patent Document 1). In these methods, the effect of removing inorganic substances, organic substances, etc. adhering to the reverse osmosis membrane surface is also improved with a surfactant, bactericidal agent, acid or alkaline agent, and the like.
  • the reverse osmosis membrane module in the second and subsequent stages is introduced from the permeate side in order to prevent deterioration of the membrane performance due to the silica scale. It has also been proposed to perform backwashing (see, for example, Patent Document 2).
  • a filtration step in which raw water is permeated through the filtration membrane to obtain filtered water
  • a washing step in which the membrane is washed with filtered water.
  • the filtration membrane is washed with a chemical solution using a filtration pressure, a filtration flow rate, and the like as a guide (see, for example, Patent Document 3).
  • An object of the present invention is to provide a reverse osmosis membrane device and a method of operating a reverse osmosis membrane device that can efficiently wash a reverse osmosis membrane and obtain reverse osmosis membrane permeated water with a stable amount of water for a long period of time.
  • the adhesion and deposition of the deposit on the reverse osmosis membrane surface proceeds during cleaning, It takes time to clean.
  • these scale components may be deposited on the reverse osmosis membrane surface, which may make cleaning difficult.
  • the reverse osmosis membrane device is stopped at the time of washing, and after the washing, the stopped reverse osmosis membrane device is restarted, and only when the flow rate and pressure of the permeated water at the time of restarting are measured, washing is sufficiently performed.
  • the reverse osmosis membrane device of the present invention comprises a reverse osmosis membrane bank installed in multiple stages in the flow path of the water to be treated, and a blockage degree detecting means for independently detecting the blockage degree of the reverse osmosis membrane bank at each stage.
  • a reverse osmosis membrane cleaning means for cleaning the reverse osmosis membrane bank of each stage by passing wash water from the concentration side to the reverse osmosis membrane bank of each stage, and to the reverse osmosis membrane bank of each stage
  • a water flow / cleaning control valve for switching between water flow and water cleaning
  • a cleaning control means for operating the reverse osmosis membrane cleaning means at a predetermined timing to clean the reverse osmosis membrane bank at each stage, and the cleaning control means
  • the cleaning control unit measures an elapsed period and operates the reverse osmosis membrane cleaning unit at a predetermined timing according to the measured elapsed period.
  • control device performs the cleaning of the reverse osmosis membrane bank in each stage independently for each reverse osmosis membrane bank in each stage.
  • the reverse osmosis membrane bank at each stage is preferably configured by connecting one or two or more reverse osmosis membrane vessels in parallel.
  • the washing water is permeated water of the reverse osmosis membrane bank of each stage.
  • control device periodically performs water flow and washing of the reverse osmosis membrane bank at each stage.
  • the reverse osmosis membrane bank at each stage is water-passed for 1 hour to several days and the washing is performed for 1 to 10 minutes.
  • the operation method of the reverse osmosis membrane device of the present invention is a reverse osmosis membrane bank installed in multiple stages in the flow path of the water to be treated, reverse osmosis membrane cleaning means for cleaning the reverse osmosis membrane bank of each stage, A method for cleaning a reverse osmosis membrane device comprising a water flow / cleaning control valve for switching water flow / washing to the reverse osmosis membrane bank of each stage, wherein water is treated by the reverse osmosis membrane device.
  • the water osmosis / cleaning control valve is controlled, and the reverse osmosis membrane bank of each stage is independently cleaned for each reverse osmosis membrane of each stage. preferable.
  • the operation method of the reverse osmosis membrane device of the present invention controls the water flow / cleaning control valve to combine the plurality of the reverse osmosis membrane banks in the respective stages with the cleaning for each of the reverse osmosis membrane banks in the respective stages.
  • the reverse osmosis membrane bank group is preferably performed in order.
  • the reverse osmosis membrane device and the operation method of the reverse osmosis membrane device of the present invention the reverse osmosis membrane can be efficiently washed, and reverse osmosis membrane permeated water can be obtained with a stable amount of water for a long period of time.
  • FIG. 1 is a diagram schematically illustrating a reverse osmosis membrane device according to a first embodiment. It is a figure which represents roughly the reverse osmosis membrane apparatus which concerns on 2nd Embodiment. It is a graph showing the change of the water flow differential pressure
  • FIG. 1 schematically shows a reverse osmosis (RO) membrane device 100 according to this embodiment.
  • a reverse osmosis membrane device 100 shown in FIG. 1 includes a first reverse osmosis (RO) membrane bank 10, a second reverse osmosis (RO) membrane bank 20, and a third reverse osmosis (RO) membrane bank 30. They are connected in series and configured in three stages. The permeated water of the first to third reverse osmosis membrane banks 10 to 30 is supplied to the tank 40. Further, the reverse osmosis membrane device 100 includes a pump P1 for transferring the water to be treated. The pump P1 may not be provided in the reverse osmosis membrane device 100. In this case, it is provided upstream of the reverse osmosis membrane device 100.
  • the reverse osmosis membrane device 100 is configured so that each reverse osmosis membrane bank 10, second reverse osmosis membrane bank 20, third reverse osmosis reverse osmosis membrane bank 30 has a water flow differential pressure, a permeated water amount, etc.
  • Occlusion degree detecting means 10a, 10b, 10c, 20a, 20b, 30a, 30b for measuring the degree of occlusion of the osmotic membrane bank are provided.
  • the reverse osmosis membrane device 100 includes reverse osmosis membrane cleaning means and a water flow / cleaning control valve. With these reverse osmosis membrane cleaning means and the water flow / cleaning control valve, each reverse osmosis membrane bank can be cleaned independently or entirely.
  • the reverse osmosis membrane cleaning means includes, for example, a pump P2 for transferring cleaning water and a pipe connected to each reverse osmosis membrane bank.
  • the water flow / wash control valve is provided, for example, in the path of the piping that supplies treated water or wash water to each reverse osmosis membrane bank and discharges it, and stops the flow of water to and through the wash water. It is a valve to switch.
  • the reverse osmosis membrane device 100 serves as a water flow / cleaning control valve, a valve V2 for controlling the supply of water to be treated to the first reverse osmosis membrane bank 10, and a permeated water tank 40 of each reverse osmosis membrane bank.
  • valve V1 for controlling the supply, the first reverse osmosis membrane bank 10, the second reverse osmosis membrane bank 20, the third reverse osmosis reverse osmosis membrane bank 30 and the flow of the concentrated water to the subsequent stage and the outside of the system
  • Valves V11 to V13, V21 to V23, V31 and V33 are provided for controlling the flow and discharge of the drainage and washing water to the reverse osmosis membrane banks.
  • the reverse osmosis membrane device 100 includes a timer unit 42 as a cleaning control unit that operates the reverse osmosis membrane cleaning unit and the water flow / cleaning control valve at a predetermined timing, and a control device that comprehensively controls the operation of the entire device. 41.
  • the timer means 42 measures the elapsed period from a predetermined time point, and operates the reverse osmosis membrane cleaning means at a predetermined timing according to the measured elapsed time.
  • Each of the first to third reverse osmosis membrane banks 10 to 30 has a configuration in which a plurality of reverse osmosis membrane vessels are connected in parallel. Each reverse osmosis membrane vessel is provided with a plurality of reverse osmosis membrane modules in multiple stages.
  • the concentrated water of the upstream reverse osmosis membrane bank is processed in the reverse reverse osmosis membrane bank, respectively. Concentrated water in the most downstream reverse osmosis membrane bank is discharged out of the system.
  • the reverse osmosis membrane module provided in each reverse osmosis membrane vessel is configured to accommodate, for example, a reverse osmosis membrane and a flow path material for passing water to be treated through the reverse osmosis membrane in a casing.
  • the reverse osmosis membrane is formed in a hollow fiber shape, a spiral shape, a flat plate shape, a tube shape or the like.
  • the reverse osmosis membrane is preferably a spiral reverse osmosis membrane from the viewpoint of improving pressure resistance and improving processing efficiency.
  • the reverse osmosis membrane device 100 includes the first to third reverse osmosis membrane banks 10 to 30, the number of reverse osmosis membrane banks provided in the reverse osmosis membrane device is not limited to this.
  • the reverse osmosis membrane bank included in the reverse osmosis membrane device 100 may have any number of stages of two or more.
  • the timer means 42 measures the elapsed time from the start of operation of the reverse osmosis membrane device 100, and inputs a first washing start signal to the control device 41 when a preset predetermined period has elapsed. Thereby, the control device 41 determines the first cleaning start of the reverse osmosis membrane bank.
  • the control device 41 determines the start of cleaning, the control device 41 operates the reverse osmosis membrane cleaning means to start cleaning of any reverse osmosis membrane bank of the first to third reverse osmosis membrane banks 10 to 30.
  • the cleaning of the reverse osmosis membrane device 100 may be performed by passing cleaning water through all of the first to third reverse osmosis membrane banks 10 to 30 or the first to third reverse osmosis membrane banks 10 to 30.
  • the washing water may be individually passed through.
  • this reverse osmosis membrane bank cleaning step for example, cleaning water is passed from the concentration side of each reverse osmosis membrane bank.
  • the washed water after washing is discharged from the inlet side of each reverse osmosis membrane bank.
  • the washing water is preferably supplied to each reverse osmosis membrane bank at a pressure of 0.1 to 0.4 MPa.
  • the timer means 42 inputs a signal to the control device 41 when a predetermined cleaning period set in advance elapses. Thereby, the control apparatus 41 judges the washing
  • the control device 41 controls the reverse osmosis membrane cleaning unit to stop the supply of the cleaning water to the reverse osmosis membrane bank. This stops the cleaning of the reverse osmosis membrane bank.
  • the timer means 42 inputs the next cleaning start signal to the control device 41 when a predetermined period set in advance has elapsed. Thereby, the control apparatus 41 judges the next washing
  • the control device 41 controls the reverse osmosis membrane cleaning means to start the cleaning of the reverse osmosis membrane bank in the same manner as the first cleaning. Thereafter, similarly to the first cleaning, the timer means 42 and the control device 41 stop the cleaning of the reverse osmosis membrane bank.
  • the next cleaning of the reverse osmosis membrane device 100 may be performed by passing cleaning water through all of the first to third reverse osmosis membrane banks 10 to 30 or the first to third reverse osmosis membrane banks 10. It may be carried out by passing washing water individually through 30.
  • a water flow preparation step is performed as necessary, and then raw water is treated.
  • the control device 41 determines the start of the water flow preparation step
  • the control device 42 passes wash water from the supply water side of the first reverse osmosis membrane bank 10 and concentrates the first reverse osmosis membrane bank 10.
  • the control device 42 passes wash water from the supply water side of the first reverse osmosis membrane bank 10 and concentrates the first reverse osmosis membrane bank 10.
  • the concentrated water in the third reverse osmosis membrane bank 30 and the permeated water in the first to third reverse osmosis membrane banks 10 to 30 are discharged out of the system. Thereby, the air etc.
  • control apparatus 41 judges the start of the process of raw
  • the control device 41 determines the start of the raw water treatment, the control device 41 stops the reverse osmosis membrane cleaning means, switches the water flow / cleaning control valve, and supplies the raw water to the reverse osmosis membrane device 100 by the pump P1.
  • the flow differential pressure exceeds the allowable value, or the permeated water amount exceeds the allowable value, with the increase in the water flow differential pressure for constant speed filtration and the decrease in the permeated water volume as a guide for constant pressure filtration. It is judged that the reverse osmosis membrane is clogged due to the adhesion and deposition of turbid substances, microorganisms, scale materials such as calcium scale, silica scale, etc. on the reverse osmosis membrane. To do. At this time, the entire reverse osmosis membrane device is stopped and chemical cleaning cleaning of the reverse osmosis membrane module is performed.
  • the permissible value is a value when chemical cleaning cleaning is started in a normal method for chemical cleaning cleaning of a reverse osmosis membrane.
  • the degree of clogging of the reverse osmosis membrane due to the adhesion of the deposit to the reverse osmosis membrane which is evaluated based on the water flow differential pressure and the amount of permeated water, is referred to as a blockage degree.
  • the reverse osmosis membrane device is usually re-watered after performing chemical cleaning and cleaning. However, if the water is continuously passed while alternately performing chemical cleaning and water flow, the reverse osmosis will eventually occur. The degree of replacement blockage that requires replacement of the membrane module is reached.
  • the cleaning step is performed with a degree of occlusion lower than the degree of occlusion of the reverse osmosis membrane when the chemical cleaning is performed. Therefore, the elapsed time from the start of operation of the reverse osmosis membrane device 100 and the elapsed time from the previous cleaning to the next cleaning until the start of cleaning of each reverse osmosis membrane device 100 in this embodiment are determined as normal.
  • the reverse osmosis membrane bank is set in a shorter period than the period until the water flow differential pressure exceeds the allowable value or the period until the permeated water amount falls below the allowable value.
  • the period until the start of the reverse osmosis membrane bank cleaning step is determined in advance, for example, depending on the water flow differential pressure of each reverse osmosis membrane bank, the quality of water to be treated, the amount of treated water in each reverse osmosis membrane bank, and the like.
  • the cleaning process is performed with a degree of occlusion lower than the degree of occlusion when the water flow differential pressure exceeds an allowable value, and adhesion and deposition of the adhering matter adhering to the membrane surface proceeds. Rinse them before doing.
  • the period until the degree of blockage exceeds the allowable value can be made extremely long, and treated water can be obtained stably for a long period of time without performing chemical cleaning. .
  • the timing for performing the cleaning process of the reverse osmosis membrane device is the elapsed time. Can be automatically controlled based on the above.
  • the example of determining the cleaning start and the cleaning stop of the reverse osmosis membrane bank according to the elapsed time measured by the timer means 42 has been described.
  • the water supply side and the permeate water side of each reverse osmosis membrane bank Based on the measured value of the water pressure meter or flow meter (blockage measuring means) provided on the concentrated water side, it is blocked by the difference in water pressure between the water supply side, the permeate water side, and the concentrated water side (water flow differential pressure) or the flow rate difference.
  • the cleaning control means inputs a signal such as cleaning start / stop to the control device 41 at a timing when the degree of blockage set in advance is reached, and based on this, the control device 41 starts cleaning of the reverse osmosis membrane device ⁇ You may decide to stop. Also in this case, the degree of occlusion at the start of cleaning is set smaller than the degree of occlusion when the start of normal chemical cleaning is determined.
  • the control device 41 controls each valve and pump of the reverse osmosis membrane cleaning means so that the cleaning water is supplied to the reverse osmosis membrane device 100 as indicated by the thick line in FIG. Pass water from the concentration side. Specifically, the control device 41 stops the pump P1, drives the pump P2, closes the valves V11, V21, and V31, opens the valves V6, V12, V13, V22, V23, and V33, and supplies cleaning water. Water is passed from the concentration side of the reverse osmosis membrane device 100.
  • washing water can be supplied from the concentration side at low pressure, and the reverse osmosis membrane surface can be washed without passing through the reverse osmosis membrane, thereby increasing the supply amount of washing water and improving the washing efficiency. . In this way, the scale generated on the reverse osmosis membrane surface can be washed away before being deposited and deposited.
  • each of the first to third reverse osmosis membrane banks 10, 20, and 30 is supplied from the downstream side to the third reverse osmosis membrane.
  • Water can be passed from the concentration side in the order of the membrane bank 30, the second reverse osmosis membrane bank 20, and the first reverse osmosis membrane bank 10.
  • the washing step may be performed in order for each reverse osmosis membrane bank.
  • the cleaning start timing is determined for each reverse osmosis membrane bank, and based on this, the start of cleaning of each reverse osmosis membrane bank may be determined using the timer means 42.
  • the reverse osmosis membrane device 100 includes a large number of reverse osmosis membrane banks
  • the cleaning water is collectively passed through each reverse osmosis membrane bank and washed as a whole
  • the reverse osmosis membrane on the upstream side It may be difficult to secure an optimal flow rate in the bank, and cleaning of the reverse osmosis membrane bank on the upstream side (upstream side) may be insufficient. This problem becomes more prominent as the number of reverse osmosis membrane banks increases.
  • the amount of washing water in each reverse osmosis membrane bank can be secured at a flow rate that is greater than or equal to the optimum value for washing, so that each reverse osmosis membrane bank is more effectively Cleaning can be performed.
  • the adhesion, deposition and deposition of scale components on the reverse osmosis membrane surface is more likely to proceed on the reverse osmosis membrane on the downstream side (downstream side). Therefore, in a reverse osmosis membrane device including a large number of reverse osmosis membrane banks, it is possible to obtain a better cleaning effect by preferentially cleaning the reverse osmosis membrane bank on the rear stage side. Specifically, a higher cleaning effect can be obtained by preferentially cleaning the reverse osmosis membrane bank on the rear stage by preferentially cleaning the reverse osmosis membrane bank on the rear stage by increasing the frequency of cleaning the reverse osmosis membrane bank on the rear stage. . In this case, for example, when the reverse osmosis membrane device includes a three-stage reverse osmosis membrane bank, it is possible to perform the cleaning process only on the second and third stages.
  • the reverse osmosis membrane device 100 when the reverse osmosis membrane device 100 includes a large number of reverse osmosis membrane banks, these may be divided into several groups, and the cleaning process may be sequentially performed for each group of bank groups.
  • the number and combination of reverse osmosis membrane banks to be cleaned in each cleaning step can be appropriately set based on the number of reverse osmosis membrane vessels provided in the reverse osmosis membrane bank.
  • the processing flow rate of the reverse osmosis membrane bank may be different for each reverse osmosis membrane bank.
  • the rate and timing of increasing the degree of occlusion differ for each reverse osmosis membrane bank.
  • Reverse osmosis membrane banks with a fast increase in the degree of occlusion can be collected and washed at different timings.
  • the first washing step is performed on the reverse osmosis membrane bank having a fast increase in the degree of occlusion
  • the above washing step is performed on the reverse osmosis membrane bank having the slow rate of increase in the degree of occlusion.
  • a water flow preparation step can be performed after the washing step.
  • the reverse osmosis membrane module needs to be replaced.
  • the cleaning process is performed with a shorter cleaning cycle in which the degree of blockage for each reverse osmosis membrane bank is increased, the frequency of replacement of the reverse osmosis membrane module can be reduced.
  • the cleaning water may contain fine bubbles made of a gas such as air, an inert gas, and water vapor, or an ultrasonic wave may be applied to the cleaning water. Good. These are effective for cleaning scale components on the reverse osmosis membrane surface.
  • the production efficiency of reverse osmosis membrane permeated water is improved because the cleaning operation can be simplified when not using chemicals.
  • chemicals for reverse osmosis membrane cleaning may be mixed in the cleaning water as necessary. .
  • FIG. 2 is a block diagram showing in detail a reverse osmosis membrane device 1 which is a specific example of the reverse osmosis membrane device 100.
  • the reverse osmosis membrane device 1 like the reverse osmosis membrane device 100, includes a first reverse osmosis (RO) membrane bank 10, a second reverse osmosis membrane bank 20, and a third reverse osmosis membrane device 100.
  • a permeable membrane bank 30 is provided.
  • the permeated water of the first to third reverse osmosis membrane banks 10 to 30 is supplied to the tank 40.
  • plays the function similar to the reverse osmosis membrane apparatus 100 demonstrated above attaches
  • the reverse osmosis membrane apparatus 1 collects the permeated water of each reverse osmosis membrane bank and transfers it to the tank 40, and the washed water discharged from each reverse osmosis membrane bank is removed from the system.
  • a cleaning water discharge pipe 70 is provided.
  • the washing water discharge pipe 70 has a branch pipe connected to the discharge side, and discharges the washing water from the branch pipe to the outside of the system.
  • a valve V1 for switching the permeate water flow and the stoppage of the permeate water and feeding the permeate water to the tank 40 is inserted.
  • the permeated water collecting pipe 60 is provided with a permeated water discharge pipe 61 that discharges the permeated water outside the system through the washing water discharge pipe 70 without passing through the tank 40.
  • a valve V34 is inserted in the permeate discharge pipe 61. The valve V34 controls the opening and closing of the flow path from the tank 40 to the permeate discharge pipe 61.
  • the first reverse osmosis membrane bank 10 is configured by arranging two reverse osmosis membrane vessels 11 and 12 in parallel.
  • the first reverse osmosis membrane bank 10 includes a supply pipe 11 a that supplies treated water to the reverse osmosis membrane vessel 11, and a supply pipe 12 a that branches from the supply pipe 11 a and supplies treated water to the reverse osmosis membrane vessel 12.
  • a pump P1 and a valve V2 are sequentially inserted in the supply pipe 11a.
  • the supply pipe 11 a and the tank 40 are connected by a washing water pipe 50 that supplies treated water from the tank 40 to the first reverse osmosis membrane bank 10.
  • a valve V5 is inserted in the cleaning water pipe 50.
  • the valve V5 switches between passing the washing water to the washing water pipe 50 and stopping it.
  • a cleaning water discharge pipe 70 is connected to the path of the cleaning water pipe 50 via a valve V6.
  • the valve V6 switches between draining and stopping the drainage from each reverse osmosis membrane device.
  • the reverse osmosis membrane vessels 11 and 12 are connected with permeate tubes 11b and 12b for transferring the permeated water of the RO permeable membrane vessels 11 and 12, and concentrated water tubes 11c and 12c for transferring concentrated water, respectively.
  • a permeated water collecting pipe 13 for collecting the permeated water of the reverse osmosis membrane vessels 11 and 12 sent from the permeated water pipes 11b and 12b is connected to the permeated water pipes 11b and 12b.
  • the permeated water collecting pipe 13 is connected to the permeated water collecting pipe 60.
  • the concentrated water pipe 11c is joined to the concentrated water pipe 12c.
  • a concentrated water collecting pipe 14 is connected to the concentrated water pipe 12c on the downstream side of the junction point through a valve V11.
  • the valve V11 switches the opening and closing of the flow path from the concentrated water pipe 12c to the concentrated water collecting pipe 14.
  • the concentrated water collecting pipe 14 transfers the concentrated water of the reverse osmosis membrane vessels 11 and 12 to the second reverse osmosis membrane bank 20 at the subsequent stage.
  • a wash water discharge pipe 12d is connected to the concentrated water collecting pipe 14 on the downstream side of the valve V11 via a valve V12.
  • the valve V ⁇ b> 12 switches between opening and closing the flow path for drainage from the second reverse osmosis membrane bank 10.
  • the washing water discharge pipe 12 d sends the washing water after washing the second reverse osmosis membrane bank 20 to the washing water discharge pipe 70.
  • a washing water pipe 15 branched from the washing water pipe 50 is connected to the downstream side of the junction of the concentrated water pipe 11c and the concentrated water pipe 12c.
  • a valve V13 is inserted in the cleaning water pipe 15. The valve V13 switches between opening and closing the flow path of the wash water from the wash water pipe 15 to the concentrated water pipe 12c.
  • the configurations of the second reverse osmosis membrane bank 20 and the third reverse osmosis membrane bank 30 and the basic configuration of the piping system are the same as those of the first reverse osmosis membrane bank 10.
  • the second reverse osmosis membrane bank 20 is configured by arranging two reverse osmosis membrane vessels 21 and 22 in parallel.
  • the second reverse osmosis membrane bank 20 includes a supply pipe 21 a that supplies treated water to the reverse osmosis membrane vessel 21 and a supply pipe 22 a that supplies treated water to the reverse osmosis membrane vessel 22.
  • the supply pipes 21a and 22a are connected to the concentrated water collecting pipe 14 for transferring the concentrated water of the first reverse osmosis membrane bank.
  • reverse osmosis membrane vessels 21 and 22 are connected with permeate water tubes 21b and 22b for transferring the permeated water of the RO permeable membrane vessels 21 and 22 and concentrated water tubes 21c and 22c for transferring the concentrated water, respectively.
  • a permeated water collecting pipe 23 for collecting the permeated water of the reverse osmosis membrane vessels 21 and 22 sent from the permeated water pipes 21b and 22b is connected to the permeated water pipes 21b and 22b.
  • the permeated water collecting pipe 23 is connected to the permeated water collecting pipe 60.
  • the concentrated water pipe 21c is joined to the concentrated water pipe 22c.
  • a concentrated water collecting pipe 24 is connected to the downstream side of the concentrated water pipe 22c with respect to the junction point through a valve V21.
  • the valve V21 switches between opening and closing the flow path from the concentrated water pipe 22c to the concentrated water collecting pipe 24.
  • the concentrated water collecting pipe 24 transfers the concentrated water of the reverse osmosis membrane vessels 21 and 22 to the third reverse osmosis membrane bank 30 at the subsequent stage.
  • a washing water discharge pipe 22d is connected to the downstream side of the valve V21 of the concentrated water pipe 22c.
  • a valve V22 is inserted in the washing water discharge pipe 22d.
  • the cleaning water discharge pipe 22 d is connected to the path of the cleaning water discharge pipe 70 and sends the cleaning water after cleaning the third reverse osmosis membrane bank 30 in the subsequent stage to the cleaning water discharge pipe 70.
  • a washing water pipe 25 branched from the washing water pipe 50 is connected to the concentrated water pipe 22c downstream of the confluence of the concentrated water pipe 21c.
  • a valve V23 is interposed in the cleaning water pipe 25.
  • the third reverse osmosis membrane bank 30 is configured by arranging two reverse osmosis membrane vessels 31 and 32 in parallel.
  • the third reverse osmosis membrane bank 30 includes a supply pipe 31 a that supplies treated water to the reverse osmosis membrane vessel 31 and a supply pipe 32 a that supplies treated water to the reverse osmosis membrane vessel 32.
  • the supply pipes 31 a and 32 a are connected to a concentrated water collecting pipe 24 that transfers the concentrated water of the second reverse osmosis membrane bank 20.
  • reverse osmosis membrane vessels 31 and 32 are connected to permeate water tubes 31b and 32b for transferring the permeated water of the RO permeable membrane vessels 31 and 32 and concentrated water tubes 31c and 32c for transferring the concentrated water, respectively.
  • the permeate water collecting pipes 33 for collecting the permeated water of the reverse osmosis membrane vessels 31 and 32 sent from the permeate water pipes 31b and 32b are connected to the permeate water pipes 31b and 32b.
  • the permeated water collecting pipe 33 is connected to the permeated water collecting pipe 60.
  • the concentrated water pipe 31c is joined to the concentrated water pipe 32c.
  • a concentrated water collecting pipe 34 is connected to the concentrated water pipe 32c on the downstream side of the confluence point through a valve V31.
  • the concentrated water collecting pipe 34 discharges the concentrated water of the reverse osmosis membrane vessels 31 and 32 out of the system.
  • the valve V31 switches between opening and closing the discharge channel outside the concentrated water system of the reverse osmosis membrane vessels 31 and 32.
  • a cleaning water discharge pipe 32d is connected to the upstream side of the valve V31 of the concentrated water collecting pipe 34 via a valve V32.
  • the washing water discharge pipe 32d is connected to the path of the washing water discharge pipe 70 and sends the washing water after washing the reverse osmosis membrane bank from the water side to the washing water discharge pipe 70.
  • a wash water pipe 35 branched from the wash water pipe 50 is connected to the concentrated water pipe 32c on the downstream side of the junction of the concentrated water pipe 31c.
  • a valve V33 is inserted in the washing water pipe 35.
  • the reverse osmosis membrane device 1 includes the first to third reverse osmosis membrane banks 10 to 30, but the number of reverse osmosis membrane banks provided in the reverse osmosis membrane device is not limited thereto.
  • the reverse osmosis membrane bank of the reverse osmosis membrane device 1 may have an arbitrary number of stages of two or more.
  • Each of the first to third reverse osmosis membrane banks 10 to 30 includes two reverse osmosis membrane vessels.
  • the present invention is not limited to this, and the reverse osmosis membrane vessels provided in one reverse osmosis membrane bank are not limited thereto.
  • the number may be one or any number of two or more.
  • the number of reverse osmosis membrane vessels provided in each reverse osmosis membrane bank may be the same or different.
  • the number of reverse osmosis membrane modules which each reverse osmosis membrane vessel has may be the same, or may differ.
  • the operation method of the reverse osmosis membrane device 1 of the present embodiment includes a reverse osmosis membrane treatment step for obtaining reverse osmosis membrane permeated water and a washing step for washing the reverse osmosis membrane bank.
  • the cleaning step includes a step of cleaning the first reverse osmosis membrane bank 10, a step of cleaning the second reverse osmosis membrane bank 20, and a step of cleaning the third reverse osmosis membrane bank 30.
  • the case where raw water is used as the water to be treated and the treated water in the tank 40 is used as the washing water will be described as an example, but the present invention is not limited thereto.
  • the control device 41 opens the valves V1, V2, V11, V21, V31, operates the pump P1, and the raw water is disposed at the most front stage of the reverse osmosis membrane device 1. 1 to the reverse osmosis membrane bank 10.
  • the raw water supplied to the first reverse osmosis membrane bank 10 is divided and supplied to the reverse osmosis membrane vessels 11 and 12 via the supply pipes 11a and 12a.
  • the valves V12, V13, V22, V23, V32, V33, V34, V5, and V6 are normally closed, and the pump P2 is stopped.
  • the reverse osmosis membrane vessels 11 and 12 process the supplied raw water with a reverse osmosis membrane to generate permeated water and concentrated water.
  • the permeated water flows out from the reverse osmosis membrane vessels 11 and 12 through the permeated water tubes 11b and 12b, and the concentrated water flows out through the concentrated water tubes 11c and 12c, respectively.
  • the permeated water that has flowed out of the permeated water pipes 11 b and 12 b is sent to the permeated water collecting pipe 60 through the permeated water collecting pipe 13, and then stored in the tank 40.
  • the concentrated water flowing out from the concentrated water pipes 11 c and 12 c is supplied to the second reverse osmosis membrane bank 20 via the concentrated water collecting pipe 14.
  • the concentrated water of the first reverse osmosis membrane bank 10 supplied to the second reverse osmosis membrane bank 20 is divided and supplied to the reverse osmosis membrane vessels 21 and 22 via the supply pipes 21a and 22a.
  • the reverse osmosis membrane vessels 21 and 22 process the supplied treated water with a reverse osmosis membrane to generate permeated water and concentrated water.
  • the permeate flows out from the reverse osmosis membrane vessels 21 and 22 through the permeate pipes 21b and 22b and the concentrated water through the concentrate pipes 21c and 22c, respectively.
  • the permeated water flowing out from the permeated water pipes 21 b and 22 b is sent to the permeated water collecting pipe 60 through the permeated water collecting pipe 23, and then stored in the tank 40.
  • the concentrated water flowing out from the concentrated water pipes 21 c and 22 c is supplied to the third reverse osmosis membrane bank 30 via the concentrated water collecting pipe 24.
  • the concentrated water of the second reverse osmosis membrane bank 20 supplied to the third reverse osmosis membrane bank 30 is divided and supplied to the reverse osmosis membrane vessels 31 and 32 via the supply pipes 31a and 32a.
  • the reverse osmosis membrane vessels 31 and 32 process the supplied treated water with a reverse osmosis membrane to generate permeated water and concentrated water.
  • the permeated water flows out from the reverse osmosis membrane vessels 31 and 32 through the permeated water tubes 31b and 32b, and the concentrated water flows out through the concentrated water tubes 31c and 32c, respectively.
  • the permeated water that has flowed out of the permeated water pipes 31 b and 32 b is sent to the permeated water collecting pipe 60 through the permeated water collecting pipe 33, and then stored in the tank 40.
  • the concentrated water flowing out from the concentrated water pipes 31 c and 32 c is discharged out of the system via the concentrated water collecting pipe 34.
  • a cleaning process is performed as described below.
  • the cleaning process of the third reverse osmosis membrane bank 30, the cleaning process of the second reverse osmosis membrane bank, and the cleaning process of the first reverse osmosis membrane bank are sequentially performed.
  • the timer means 42 measures a period from the start of water flow to the third reverse osmosis membrane bank 30 and inputs a signal to the control device 41 when a preset period has elapsed. Thereby, the control device 41 determines the start of the cleaning of the third reverse osmosis membrane bank 30.
  • V21 and V31 are closed and valves V22 and V33 are opened.
  • the pump P1 is stopped, the pump P2 is operated, and the treated water in the tank 40 is passed from the concentration side to the reverse osmosis membrane vessels 31 and 32 through the wash water pipes 50 and 35 and the concentrated water pipes 31c and 32c. To do.
  • the wash water after washing that has passed through the reverse osmosis membrane vessels 31 and 32 is discharged from the wash water discharge pipe 70 through the supply pipes 31a and 32a, the concentrated water collecting pipe 24, and the wash water discharge pipe 22d in this order. Is done. As a result, the third reverse osmosis membrane bank 30 is cleaned.
  • the timer means 42 measures the period from the start of cleaning of the third reverse osmosis membrane bank 30 and inputs a signal to the control device 41 when a preset cleaning period has elapsed from the start of cleaning. Thereby, the control device 41 determines the stop of the cleaning of the third reverse osmosis membrane bank 30. When the control device 41 determines to stop the cleaning, the control device 41 closes the valves V22 and V33 and stops the cleaning of the third reverse osmosis membrane bank 30.
  • control device 41 determines the start of cleaning of the second reverse osmosis membrane bank 20 after the cleaning of the third reverse osmosis membrane bank 30 is stopped.
  • the valve V1, V2, V5, V6, V11, V13, V21, V22, V31, V32, and V33 are closed and the valve is closed. Open V12 and V23.
  • the treated water in the tank 40 is passed through the reverse osmosis membrane vessels 21 and 22 from the concentration side through the wash water pipes 50 and 25 and the concentrated water pipes 21c and 22c.
  • the wash water after washing that has passed through the reverse osmosis membrane vessels 21 and 22 is transferred to the wash water discharge pipe 70 through the supply pipes 21a and 22a, the concentrated water collecting pipe 14 and the wash water discharge pipe 12d in this order. To be discharged. As a result, the second reverse osmosis membrane bank 20 is cleaned.
  • the timer means 42 inputs a signal to the control device 41 when a preset cleaning period has elapsed from the start of cleaning of the second reverse osmosis membrane bank 20.
  • the control device 41 determines that the cleaning of the second reverse osmosis membrane bank 20 is stopped.
  • the control device 41 closes the valves V12 and V23 and stops the cleaning of the second reverse osmosis membrane bank 20.
  • control device 41 determines the start of the cleaning of the first reverse osmosis membrane bank 10 after the cleaning of the second reverse osmosis membrane bank 20 is stopped.
  • the valves V6 and V13 are closed while the valves V1, V2, V5, V11, V12, V21 to 23, and V31 to 34 are closed. open.
  • the treated water in the tank 40 is passed through the reverse osmosis membrane vessels 11 and 12 from the concentration side through the washing water pipes 50 and 15 and the concentrated water pipes 11c and 12c.
  • the washed water after washing that has passed through the reverse osmosis membrane vessels 11 and 12 is transferred to the concentrated water discharge pipe 70 through the supply pipes 11a and 12a and the washing water pipe 50, and is discharged out of the system. As a result, the first reverse osmosis membrane bank 10 is cleaned.
  • the timer means 42 inputs a signal to the control device 41 when a preset cleaning period has elapsed from the start of cleaning of the first reverse osmosis membrane bank 10.
  • the control device 41 determines that the cleaning of the first reverse osmosis membrane bank 10 is stopped.
  • the control device 41 closes the valves V6 and V13 and stops the cleaning of the first reverse osmosis membrane bank 10.
  • the cleaning steps for the first to third reverse osmosis membrane banks 10 to 30 may be performed continuously or intermittently.
  • the control device 41 may stop the pump P2 when it is determined that the cleaning of each reverse osmosis membrane bank is stopped, and operate the pump P2 when it is determined that each cleaning is started. .
  • a water flow preparation step for discharging bubbles remaining in the flow path of the reverse osmosis membrane device 1 may be performed. Good.
  • the timer means 42 inputs a signal to the control device 41 after the elapse of a predetermined period after the cleaning process of the first to third reverse osmosis membrane banks 10 to 30 is completed.
  • the control device 41 closes the valves V1, V2, V6, V12, V13, V22, V23, and V33 and opens the valves V5, V11, V21, V32, and V34.
  • the treated water in the tank 40 is passed through the washing water pipe 50, the valve V5, and the supply pipes 11a and 12a to the reverse osmosis membrane vessels 11 and 12.
  • the concentrated water of the reverse osmosis membrane vessels 11 and 12 is passed through the reverse osmosis membrane vessels 21 and 22 through the concentrated water collecting pipe 14 and the supply pipes 21a and 22a.
  • the concentrated water of the reverse osmosis membrane vessels 21 and 22 is passed through the reverse osmosis membrane vessels 31 and 32 through the concentrated water collecting pipe 24 and the supply pipes 31a and 32a.
  • the concentrated water in the reverse osmosis membrane vessels 31 and 32 is discharged out of the system through the washing water discharge pipe 32d and the washing water discharge pipe 70.
  • the permeated water of the reverse osmosis membrane vessels 11, 12, 21, 22, 31, and 32 is transmitted from the permeated water collecting pipes 13, 23, and 33 to the permeated water collecting pipe 60, the permeated water discharging pipe 61, and the washing water discharging pipe 70, respectively. It is discharged out of the system through in order.
  • the reverse osmosis membrane treatment step and the washing step are performed, and the water flow preparation step is further performed as necessary, and then the reverse osmosis membrane treatment step is started again.
  • a reverse osmosis membrane treatment process, a washing process, and a water flow preparation process performed as needed are automatically and repeatedly executed.
  • one reverse osmosis membrane vessel has 4 reverse osmosis membrane modules with a treatment flow rate of 700 L / h to 1700 L / h. Up to 6 units are connected in series. Further, the one reverse osmosis membrane bank, process flow reverse osmosis membrane vessel of 2.8m 3 /h ⁇ 10.2m 3 / h are connected in parallel 1-40 group.
  • a reverse osmosis membrane treatment step for 1 hour to several days, specifically 1 hour to 7 days to 10 days, and each washing step for one stage reverse osmosis membrane bank are performed. Repeat for 1 to 3 minutes and 3 steps for a total of 1 to 10 minutes. At this time, the water flow preparation step is performed, for example, for 1 to 10 minutes as necessary.
  • the reverse osmosis membrane bank can be automatically washed by setting the reverse osmosis membrane treatment time and the washing time, and reverse osmosis membrane permeated water can be obtained stably for a long period of time.
  • the cleaning process of the first to third reverse osmosis membrane banks 10 to 30 has been described as an example in which the third reverse osmosis membrane bank 30 on the downstream side is sequentially performed from the upstream side to the upstream side. It is not limited. Depending on the number of reverse osmosis membrane vessels in each reverse osmosis membrane bank and the treatment flow rate, the order, time, and procedure of cleaning the reverse osmosis membrane bank can be set as appropriate.
  • the starting point of time measurement of the timer means (0 hour point) can be arbitrarily set.
  • the example of determining the start of cleaning of each reverse osmosis membrane bank based on the passage of time measured by the timer means has been described.
  • the supply pipe and permeate water pipe of each reverse osmosis membrane bank Is provided with a water pressure meter or a flow meter, and the degree of blockage is evaluated based on the difference between the measured water pressure or flow rate between the supply pipe side and the permeated water pipe side, and based on a predetermined blockage degree set in advance.
  • 41 may determine the start of cleaning of each reverse osmosis membrane bank.
  • the reverse osmosis membrane apparatus generally starts cleaning from the degree of blockage of about 1 to 10% at which chemical cleaning cleaning of the reverse osmosis membrane apparatus is performed, or from the start of water flow of the reverse osmosis membrane apparatus.
  • the degree of occlusion at the start of cleaning is set so as to be about 0.5 to 30% of the period until chemical cleaning is performed.
  • FIG. 3 shows the water flow differential pressure in the reverse osmosis membrane device when reverse osmosis membrane permeated water is obtained in the above embodiment in which the reverse osmosis membrane treatment step by the reverse osmosis membrane device and the reverse osmosis membrane device washing step are repeated.
  • the change is schematically represented.
  • the case where the cleaning method of the embodiment is performed is indicated by a solid line, and the case where the conventional chemical cleaning method is performed is indicated by a broken line as a comparison.
  • the reverse osmosis membrane permeated water is manufactured by periodically performing the cleaning process by the method of the present embodiment, the reverse osmosis membrane permeated water is obtained by performing cleaning by the conventional chemical cleaning cleaning. Compared with the obtained method, not only the cleaning time for each time can be shortened, but also the period until the membrane module replacement can be extended. Alternatively, the number of chemical cleaning washings can be reduced, or the chemical cleaning washing itself can be eliminated.
  • FIG. 4 schematically shows an ultrapure water production system 200 including two reverse osmosis membrane devices similar to the reverse osmosis membrane device 1 of the above-described embodiment as a desalting device in parallel.
  • the primary pure water production apparatus 220 includes a reverse osmosis membrane device 1a and a reverse osmosis membrane device 1b similar to the reverse osmosis membrane device 1 of the above-described embodiment, and an ion exchange resin device 221 as a desalination device.
  • the reverse osmosis membrane device 1a and the reverse osmosis membrane device 1b are connected in parallel.
  • the pretreatment device 210 removes raw water to obtain pretreatment water.
  • the pretreatment device 210 includes, for example, a coagulation sedimentation device, a sand filtration device, a microfiltration device, and the like.
  • the primary pure water production apparatus 220 removes ionic components and nonionic components in the pretreated water to obtain primary pure water.
  • the primary pure water production apparatus 220 is an activated carbon apparatus, a degassing apparatus that removes dissolved gas (vacuum degassing apparatus, membrane degassing apparatus, degassing tower, etc.), and ultraviolet oxidation that decomposes organic matter.
  • a device, a microfiltration device for removing particulate impurities, and the like may be appropriately selected and provided.
  • the secondary pure water production apparatus 230 removes trace residual impurities in the primary pure water obtained above to obtain high purity ultrapure water.
  • the secondary pure water production apparatus 230 has an ultraviolet oxidation apparatus for decomposing organic substances and a non-regenerative mixed bed type ion exchange resin apparatus (for removing ionic components) on the downstream side of the heat exchanger for adjusting the temperature of the primary pure water. Polisher), a degassing membrane device for removing dissolved gas, an ultrafiltration device for removing particulate impurities, and the like.
  • the primary pure water production apparatus 220 includes reverse osmosis membrane devices 1a and 1b on the front side thereof, and is configured to perform most desalting with the reverse osmosis membrane device on the front side.
  • pretreated water having a relatively high impurity concentration is supplied to the reverse osmosis membrane devices 1a and 1b.
  • the primary pure water production apparatus 220 in this embodiment uses the reverse osmosis membrane apparatus having the automatic cleaning function of the above embodiment as the reverse osmosis membrane apparatuses 1a and 1b.
  • the reverse osmosis membrane apparatuses 1a and 1b As a result, even when pretreatment water having a relatively high impurity concentration is treated, adhesion of deposits to the reverse osmosis membrane can be suppressed for a long time, and reverse osmosis membrane permeated water can be obtained stably for a long time.
  • two reverse osmosis membrane apparatuses 1a and 1b are provided in parallel.
  • the reverse osmosis membrane treatment can be performed without stopping the reverse osmosis membrane treatment by shifting the execution timing so that the timings of the washing steps of the two reverse osmosis membrane devices 1a and 1b provided in parallel do not overlap. Cleaning can be performed. Therefore, RO permeated water can be obtained with a stable amount of water for a long period of time.
  • the two cleaning steps of the reverse osmosis membrane devices 1a and 1b are performed from the start of the production of ultra pure water in the ultra pure water production system 200, similarly to the cleaning step of the reverse osmosis membrane device 1 described above. This can be done automatically based on the elapsed time. Moreover, the water flow differential pressure or the permeated water amount in the reverse osmosis membrane devices 1a, 1b is measured, the blockage degree is evaluated by the measured water flow differential pressure or the permeated water amount, and the blockage degree and the elapsed time are combined. It is also possible to determine the start of cleaning so that the timings of the cleaning steps do not overlap.
  • the reverse osmosis membrane device provided in the primary pure water production device is automatically cleaned regularly, the adhesion of deposits to the reverse osmosis membrane is suppressed for a long period of time. RO permeated water can be obtained stably.
  • the reverse osmosis membrane bank provided in the reverse osmosis membrane device can be entirely cleaned by setting the control device, It is possible to wash each reverse osmosis membrane bank group. Therefore, the degree of freedom in setting the timing of the cleaning process is high. Therefore, the operation and chemical usage associated with reverse osmosis membrane cleaning can be reduced, and highly pure ultrapure water can be produced extremely efficiently.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La présente invention vise à fournir un appareil à membrane à osmose inverse et un procédé de fonctionnement d'un appareil à membrane à osmose inverse, dans lesquels le lavage des membranes à osmose inverse est réalisé efficacement et il est possible d'obtenir un perméat de membrane à osmose inverse à un volume d'eau stable. L'invention concerne un appareil à membrane à osmose inverse comportant : des bancs de membranes à osmose inverse disposés dans de multiples étages dans le canal d'écoulement pour l'eau traitée ; des moyens de détection de degré de blocage pour détecter indépendamment le degré de blocage respectif du banc de membranes à osmose inverse de chaque étage ; des moyens de lavage de membrane à osmose inverse pour conduire l'eau de lavage du côté concentré au banc de membranes à osmose inverse de chaque étage pour laver le banc de membranes à osmose inverse de chaque étage ; des vannes de commande de lavage/conduction d'eau pour commuter entre la conduction d'eau et le lavage du banc de membranes à osmose inverse de chaque étage ; un moyen de commande de lavage pour faire fonctionner les moyens de lavage de membrane à osmose inverse à un moment spécifié pour laver le banc de membranes à osmose inverse de chaque étage ; et un dispositif de commande pour commander les moyens de lavage de membrane à osmose inverse et les vannes de commande de lavage/conduction d'eau à l'aide du moyen de commande de lavage et effectuer une conduction d'eau et un lavage du banc de membranes à osmose inverse de chaque étage jusqu'à ce que le degré de blocage du banc de membranes à osmose inverse de chaque étage, tel que mesuré par les moyens de détection de degré de blocage, atteigne un degré de blocage de remplacement défini au préalable.
PCT/JP2017/018531 2016-05-27 2017-05-17 Appareil à membrane à osmose inverse et procédé de fonctionnement d'appareil à membrane à osmose inverse Ceased WO2017204054A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108191091A (zh) * 2017-12-14 2018-06-22 深圳创能海洋科技有限公司 一种节能型反冲洗过滤系统
JP6695515B1 (ja) * 2019-06-17 2020-05-20 三菱電機株式会社 ろ過膜洗浄装置、ろ過膜洗浄方法、および水処理システム

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102119504B1 (ko) * 2018-07-18 2020-06-05 주식회사 포스코 역삼투를 이용한 폐수 재이용 방법 및 장치
CN109529625A (zh) * 2018-11-28 2019-03-29 宜宾丝丽雅股份有限公司 一种碱液连续纳滤工艺
JP2020199477A (ja) * 2019-06-12 2020-12-17 三浦工業株式会社 水処理システム
JP7239428B2 (ja) 2019-09-04 2023-03-14 オルガノ株式会社 水処理システム及び水処理方法
JP7487812B1 (ja) 2023-03-14 2024-05-21 栗田工業株式会社 純水製造装置における逆浸透膜装置の制御方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0520419Y2 (fr) * 1985-07-10 1993-05-27
JP2002143849A (ja) * 2000-08-31 2002-05-21 Toray Ind Inc 造水方法
JP2003200160A (ja) * 2002-01-09 2003-07-15 Toray Ind Inc 造水方法および造水装置
JP2007000788A (ja) * 2005-06-24 2007-01-11 Sasakura Engineering Co Ltd 逆浸透膜を使用した水処理装置
WO2009128328A1 (fr) * 2008-04-14 2009-10-22 栗田工業株式会社 Procédé de fonctionnement d'un module membranaire d'osmose inverse
JP2016067968A (ja) * 2014-09-26 2016-05-09 三浦工業株式会社 濾過システム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0520419Y2 (fr) * 1985-07-10 1993-05-27
JP2002143849A (ja) * 2000-08-31 2002-05-21 Toray Ind Inc 造水方法
JP2003200160A (ja) * 2002-01-09 2003-07-15 Toray Ind Inc 造水方法および造水装置
JP2007000788A (ja) * 2005-06-24 2007-01-11 Sasakura Engineering Co Ltd 逆浸透膜を使用した水処理装置
WO2009128328A1 (fr) * 2008-04-14 2009-10-22 栗田工業株式会社 Procédé de fonctionnement d'un module membranaire d'osmose inverse
JP2016067968A (ja) * 2014-09-26 2016-05-09 三浦工業株式会社 濾過システム

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108191091A (zh) * 2017-12-14 2018-06-22 深圳创能海洋科技有限公司 一种节能型反冲洗过滤系统
JP6695515B1 (ja) * 2019-06-17 2020-05-20 三菱電機株式会社 ろ過膜洗浄装置、ろ過膜洗浄方法、および水処理システム
WO2020255201A1 (fr) * 2019-06-17 2020-12-24 三菱電機株式会社 Appareil et procédé de nettoyage, de membrane de filtration et système de traitement d'eau
CN113966249A (zh) * 2019-06-17 2022-01-21 三菱电机株式会社 过滤膜清洗装置、过滤膜清洗方法及水处理系统
CN113966249B (zh) * 2019-06-17 2024-10-15 三菱电机株式会社 过滤膜清洗装置、过滤膜清洗方法及水处理系统

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