WO2015052906A1 - Dispositif de filtration - Google Patents

Dispositif de filtration Download PDF

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Publication number
WO2015052906A1
WO2015052906A1 PCT/JP2014/005068 JP2014005068W WO2015052906A1 WO 2015052906 A1 WO2015052906 A1 WO 2015052906A1 JP 2014005068 W JP2014005068 W JP 2014005068W WO 2015052906 A1 WO2015052906 A1 WO 2015052906A1
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WO
WIPO (PCT)
Prior art keywords
treated water
filtration
water
pump
treated
Prior art date
Application number
PCT/JP2014/005068
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English (en)
Japanese (ja)
Inventor
崇史 橋本
伸浩 青木
Original Assignee
メタウォーター株式会社
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Filing date
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Application filed by メタウォーター株式会社 filed Critical メタウォーター株式会社
Publication of WO2015052906A1 publication Critical patent/WO2015052906A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • 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
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/20—Pressure-related systems for filters
    • B01D2201/204—Systems for applying vacuum to filters
    • B01D2201/206—Systems for applying vacuum to filters by the weight of the liquid in a tube, e.g. siphon, barometric leg
    • 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

Definitions

  • the present invention relates to a filtration device, and more particularly to a filtration device having a backwashing mechanism using a siphon tube.
  • a membrane filtration device that physically separates suspended substances and colloids in water by passing water through the filtration membrane is highly convenient and is frequently used in water supply facilities.
  • the membrane filtration device the filtration membrane becomes dirty and clogged in the process of filtration, and therefore it is necessary to periodically clean and replace the filtration membrane itself.
  • This regular cleaning includes physical cleaning and chemical cleaning. In physical cleaning, clean water such as membrane filtration water is passed through the filtration membrane from the direction opposite to the filtration direction, and the filtration membrane is back-washed. There is.
  • the backwashing mechanism for backwashing filter media such as filtration membranes is also required to simplify the device structure and facilitate the operation management.
  • a siphon-type backwash device that automatically operates when the filter media reaches a predetermined clogged state in a filtration device and can restore the filtration function by backwashing the filter media is conventionally provided.
  • a filtration device provided has been proposed (see, for example, Patent Document 1).
  • a filtration tank containing the filtration material a raw water supply pipe for supplying raw water from above to the filtration material in the filtration tank, and a filtration tank Is provided with a backwash water storage tank that is formed above and stores filtered water as backwash water, and a siphon tube that communicates with the filter tank above the filter medium.
  • the filter medium can be automatically backwashed with a simple device configuration.
  • the filtration device described in Patent Document 1 is a gravity filtration device that supplies raw water to the filter medium from above and performs filtration using gravity. And in the filtration apparatus of patent document 1 using gravity filtration, since the water level in a siphon pipe
  • the present inventors do not use a gravity filtration method as a filtration method, but supply raw water pressurized with a pump to a filter medium to perform filtration, thereby providing a raw water supply pipe.
  • the idea was to make it unnecessary to limit the installation position of the filter and to secure the space above the filter medium.
  • a pump is used in a filtration device equipped with a siphon-type backwash device, a large amount of raw water supplied from the pump flows in the siphon tube when the siphon is formed. It has become clear that there is a problem that the backwashing cannot be performed effectively.
  • the present invention provides an efficient backwashing in a filtration device that has a simple device structure and easy operation management, using a configuration in which raw water is pumped up by a pump and passed through a filter medium and a siphon type backwashing mechanism. It aims to make it possible.
  • An object of the present invention is to advantageously solve the above problems, and the filtration device of the present invention is divided into a primary side region and a secondary side region by a filter medium, and filters the treated water.
  • An outlet a treated water pipe connecting the treated water storage tank and the secondary region below the treated water outlet, and one end connected to the treated water pipe between the pump and the filtration unit The other end is below the vertical position of the treated water outlet
  • a siphon pipe that is positioned and raised up to a position that is vertically higher than the position of the treated water outlet between the one end and the other end by a predetermined height, and a control that controls driving and stopping of the pump
  • the filter medium can be backwashed using the treated water by forming a siphon through the siphon tube, and the backwashing of the filter medium is started by forming the siphon through the siphon tube.
  • backwashing start detecting means for detecting and backwashing end detecting means for detecting end timing of backwashing
  • the control unit stops the pump based on a detection result of the backwashing start detecting means
  • the pump is driven again based on the detection result of the backwashing end detection means.
  • the pump is stopped based on the detection result of the backwash start detection means, and the backwash is performed.
  • the backwashing start detecting means and the backwashing end detecting means are flow switches arranged on the other end side with respect to the upper end position in the vertical direction of the siphon tube.
  • the filtration unit has an air vent pipe having one end connected to the primary side region and an air vent valve provided in the air vent pipe.
  • the pump has an output adjusting means.
  • the output of a pump can be raised gradually and it can avoid that a to-be-processed water piping, a filtration part, etc. are damaged by a water hammer.
  • an efficient backwashing is achieved in a filtration device that uses a structure in which raw water is pumped by a pump and passes through a filter medium, and a siphon type backwashing mechanism in combination with a simple device structure and easy operation management. Can be made possible.
  • FIG. 1 It is a figure which shows schematic structure of the typical filtration apparatus according to this invention.
  • (A)-(G) are the figures explaining the driving
  • a filtration device 100 shown in FIG. 1 includes a first pump (P1) 10, a filtration unit 20, a treated water storage tank 30, and a siphon tube 40.
  • the filtration device 100 filters raw water (treated water) pumped from a water source 500 such as a river, a well, or a lake through the first pump 10 in the filtration unit 20, and treats the obtained treated water (purified water) with treated water.
  • a water source 500 such as a river, a well, or a lake
  • the raw water is not limited to rivers, wells, and lakes, but can be pumped from a water source from which treated water that can be purified by filtration is obtained.
  • the first pump 10 sends the water to be treated to the primary side region of the filtration unit 20.
  • the filtration unit 20 is divided into a primary side region and a secondary side region by a filter medium, and the water to be treated introduced from the primary side region flows into the secondary side region through the filter medium and is filtered. It functions to obtain treated water.
  • a filter medium a known filter medium such as a filter membrane can be used.
  • a ceramic membrane can be used as the filtration membrane.
  • the ceramic membrane has advantages such as high strength, high reliability, high operational stability, and long life.
  • the treated water storage tank 30 has a position in the vertical direction above the filtration unit 20, and stores treated water that has been filtered by the filter medium and has flowed out of the secondary region. Furthermore, the treated water storage tank 30 has a treated water outlet 31, and when the treated water storage tank 30 stores a certain level or more of treated water and the water level reaches the treated water outlet 31, the treated water flows into the treated water outlet. 31 flows out.
  • the position in the vertical direction of the treated water outlet 31 can be arbitrarily determined, and a position that can sufficiently secure the amount of treated water used as backwash water when backwashing the filter medium described in detail later. can do.
  • the filtration device 100 includes a water intake pipe 51, a treated water pipe 52, a treated water pipe 53, and a filtered water pipe 54.
  • One end of the water intake pipe 51 is arranged so that the water to be treated can be taken from the water source 500, for example, in the water source 500.
  • the other end of the intake pipe 51 is connected to the suction port of the first pump 10.
  • the treated water pipe 52 connects the primary side region of the filtration unit 20 and the discharge port of the first pump 10.
  • the treated water pipe 53 connects the treated water storage tank 30 and the secondary region of the filtration unit 20 below the treated water outlet 31. That is, the vertical position of the connecting portion between the treated water pipe 53 and the treated water storage tank 30 is lower than the treated water outlet 31.
  • One end of the filtrate water pipe 54 is connected to the treated water outlet 31.
  • the filtration apparatus 100 can also include a flocculant supply means that is connected to the water intake pipe 51 and adds a flocculant to the water to be treated in the water intake pipe 51.
  • the flocculant supply means may be constituted by a flocculant supply tank 81, a flocculant supply pipe 82, a pump (P), and a valve. If a flocculant is added with respect to to-be-processed water, the filtration in the filtration part 20 can be performed efficiently.
  • the water pipe 52 to be treated may include a line mixer 521.
  • the line mixer 521 is disposed between the connection portion between the siphon pipe 40 and the water pipe 52 to be treated and the discharge port of the first pump 10 and functions to mix the fluid passing through the inside. If the line mixer 521 is provided, the flocculant supplied using the flocculant supply means and the water to be treated can be mixed well.
  • the filtration device 100 may have a flow rate adjustment pipe 57 for adjusting the flow rate of the water to be treated supplied to the filtration unit 20.
  • One end of the flow rate adjusting pipe 57 is connected to the treated water pipe 52 and the other end is connected to the water intake pipe 51.
  • the flow rate of the water to be treated supplied from the first pump 10 to the filtration unit 20 is adjusted by adjusting the amount of the water to be treated flowing into the flow rate adjusting pipe 57.
  • the flow rate adjusting pipe 57 has a valve (not shown), and the amount of water to be treated flowing into the flow rate adjusting pipe 57 can be changed by variously adjusting the opening degree of the valve.
  • the to-be-treated water pipe 52 may be provided with a backflow prevention valve (not shown) for preventing the backflow of the to-be-treated water during backwashing of the filter medium, which will be described in detail later.
  • the backflow prevention valve can be disposed between the discharge port of the first pump 10 and the connection portion between the treated water pipe 52 and the siphon pipe 40.
  • the backflow prevention valve includes a connection part between the flow rate adjustment pipe 57 and the treated water pipe 52 and a connection part between the treated water pipe 52 and the siphon pipe 40. Place between.
  • the treated water piping 53 may have a disinfectant supply means.
  • the disinfectant is, for example, a chlorine compound.
  • the disinfectant supply means may be constituted by a disinfectant supply tank 61, a disinfectant supply pipe 62, a pump (P), and a valve.
  • One end of the siphon tube 40 is connected to the treated water pipe 52 between the discharge port of the first pump 10 and the filtration unit 20, and the other end is positioned below the vertical position of the treated water outlet 31.
  • the siphon tube 40 is raised between one end and the other end to a position that is higher than the position of the treated water outlet 31 by a predetermined height in the vertical direction.
  • this filtration device 100 when there is no pressure loss in the filtration unit 20, that is, when there is no pressure difference (differential pressure) before and after filtration by the filter medium, the water level in the siphon tube 40 and the filter medium are two. The water level of the treated water on the secondary region side becomes equal.
  • the filtration membrane is gradually clogged during filtration due to suspended substances and colloidal substances contained in the water to be treated and a differential pressure is generated, the water level in the siphon tube 40 is higher than the water level of the treated water. Also increases by the differential pressure. That is, the water level in the siphon tube 40 gradually rises as the differential pressure increases.
  • the water to be treated in the siphon tube 40 overflows to the other end side beyond the vertical upper end position of the siphon tube 40 (also referred to as the top of the siphon tube 40 or the highest vertical position of the siphon tube 40).
  • the siphon tube 40 is filled with water between one end and the other end of the tube 40, the secondary region side (for example, the treated water storage tank 30) with respect to the filter medium and the other end of the siphon tube 40 In between, a siphon is formed through the siphon tube 40.
  • the water flow that passes through the treated water storage tank 30, the treated water pipe 53, the filtration unit 20, and the treated water pipe 52 flows into the siphon pipe 40, and the vertical upper end position of the siphon pipe 40 is set without interruption.
  • the treated water stored in the treated water storage tank 30 flows back to the other end of the siphon tube 40 through the filtration unit 20 and backwashes the filter medium.
  • the clogging substance clogged in the filtration membrane can be removed, and the filtration performance of the filtration membrane can be recovered.
  • the other end of the siphon tube 40 may be connected to a discharge pipe 55 for discharging backwash water.
  • the height at which the siphon tube 40 is raised is, for example, determined in consideration of the relationship between the filtration performance and the differential pressure, and is a height corresponding to the magnitude of the differential pressure at which backwashing is started. What is necessary is just to be higher than the height of the treated water outflow port 31 of the water storage tank 30.
  • the vertical position of the other end of the siphon tube 40 defines the amount of backwash water (backwash water amount) that flows through the filtration unit 20 during backwashing and the pressure that drives backwashing (backwash drive pressure). Therefore, in principle, the vertical position of the other end of the siphon tube 40 is lower than the water level in the treated water storage tank 30, and a position where a minimum backwash water amount and backwash drive pressure can be secured. is there.
  • the amount of backwash water is 0.5 liter or more per unit membrane area.
  • the backwash driving pressure is large, it is preferable that the difference between the water level in the treated water storage tank 30 and the vertical position of the other end of the siphon tube 40 is large. Therefore, the vertical position of the other end of the siphon tube 40 is preferably lower than the treated water storage tank 30, more preferably lower than the filtration unit 20, and the lower part of the filtration device 100, In particular, it is preferable to arrange the other end of the siphon tube 40 at the lowermost part in the vertical direction. This is because a sufficient amount of backwash water and backwash drive pressure can be secured.
  • the other end of the siphon tube 40 is located below the filtering unit 20. Therefore, when the siphon is formed, all the water in the filtering unit 20 flows out unless the siphon is artificially destroyed using a siphon breaker or the like. Incidentally, it is not essential that all the water in the filtration unit 20 has flowed out at the end of the backwashing, and “backwashing” in the present application means that the treated water flows from the secondary region to the primary region in the filtration unit 20. Refers to backflow.
  • the siphon tube 40 has a structure that prevents the flow of water flowing in the siphon tube 40 from being interrupted when the water that has risen in the siphon tube 40 flows through the vicinity of the upper end position in the vertical direction of the siphon tube 40 to the other end side. It has become.
  • the siphon tube 40 has a small diameter in the vicinity of the upper end position in the vertical direction of the siphon tube 40.
  • the backwash flow rate is determined by the backwash driving pressure, the pressure loss in the siphon tube 40 during backwashing, and the degree of filtration membrane blockage of the filtration unit 20.
  • the inner diameter of the siphon tube is preferably an inner diameter that can minimize the pressure loss in the siphon tube 40 during backwashing.
  • the flow volume adjustment pipe 57 and the to-be-processed water piping 52 are used between the discharge port of the 1st pump 10, and the connection part of the to-be-processed water piping 52 and the siphon pipe 40.
  • a backflow prevention valve is provided between the connection portion between the water supply pipe 52 and the siphon pipe 40, the backwash water does not flow into the water source 500 side. It is possible to make it difficult to interrupt the water flow in the siphon tube during backwashing.
  • the backflow prevention valve is not provided and the diameters of the treated water pipe 52 and the intake pipe 51 are designed larger than the siphon pipe 40, the treated water in the siphon pipe 40 exceeds the top of the siphon pipe 40.
  • the backwashing is started by flowing over to the other end side, and after the backwashing starts, the backwashing is completed by allowing the backwash water to flow mainly to the water source 500 side through the treated water pipe 52 and the intake pipe 51. You can also.
  • the filtration device 100 includes a control unit 70 that controls the driving and stopping of the first pump 10, backwashing start detection means that detects the start of backwashing of the filter medium due to formation of the siphon through the siphon tube 40, and reverse Back washing end detection means for detecting the washing end timing is provided.
  • the control part 70 stops the 1st pump 10 based on the detection result (namely, detection of the backwashing start by siphon formation) of the backwashing start detection means.
  • the backwashing start detecting means detects the formation of the siphon through the siphon tube 40, and the control unit 70 stops the first pump 10, so that the first pump 10 delivers the water to be treated during backwashing.
  • the backwashing can be carried out at a sufficient backwashing flow rate so as not to hinder backwashing.
  • the controller 70 arbitrarily controls the driving and stopping of the pump of the flocculant supply unit and the pump of the disinfectant supply unit in conjunction with the first pump 10.
  • control part 70 drives the 1st pump 10 again based on the detection result (namely, detection of the end time of backwashing) of the backwashing end detection means. Filtration can be restarted by detecting the end timing of backwashing by the backwashing end detection means and driving the first pump 10 after the backwashing is completed.
  • the other end side of the siphon tube 40 in the vertical direction upper end position in the illustrated example, from the vertical position of the treated water outlet 31 of the treated water storage tank 30.
  • a flow switch 41 arranged on the lower side can be used.
  • the flow switch 41 is a switch that can detect the presence or absence of a water flow having a certain range of flow velocity and flow rate.
  • the flow switch 41 disposed on the other end side of the siphon tube 40 in the vertical direction it is possible to reliably detect the formation and destruction of the siphon, that is, the start and end of backwashing.
  • the flow velocity and flow rate detection thresholds in the flow switch 41 can be set as appropriate so that the siphon can be reliably detected via the siphon tube 40.
  • the control unit 70 detects that the backwashing end detecting means constituted by the flow switch 41 does not have a flow rate and flow rate within a certain range (that is, reverse It is possible to control the first pump 10 to be driven after a predetermined time has elapsed after detecting the end timing of washing.
  • the predetermined time is, for example, 30 seconds.
  • the siphon is formed, the water level of the treated water in the treated water storage tank 30 is decreased, and therefore the backwashing by the siphon formation is started by detecting the decrease in the water level in the treated water storage tank 30. It may be detected. Further, the timing at which the water level in the treated water storage tank 30 decreases to a predetermined water level, or the timing at which the decrease in the water level in the treated water storage tank 30 stops may be detected as the backwash end timing.
  • a siphon breaker (not shown) is provided in the siphon tube 40 and the treated water storage tank 30 Backwashing can be terminated by activating the siphon breaker when the water level reaches a predetermined water level.
  • the primary side region and the secondary side region of the filtering unit 20 are filled with air after the backwashing is completed. Moreover, the filter medium in the filtration unit 20 is moist. For this reason, even if the first pump 10 is re-driven after the backwashing is finished and the water to be treated is sent out, the primary side region of the filtration unit 20 and the water in the water pipe 52 to be treated are difficult to escape through the filter medium. It takes time for the treated water to pass through the filter medium, and measures such as increasing the pump pressure of the first pump 10 are required to allow the treated water to pass through the filter medium quickly. For this reason, there exists a possibility that filtration cannot be restarted efficiently.
  • the filtration unit 20 preferably includes an air vent pipe 56 having one end connected to the primary side region, and an air vent valve 561 provided in the air vent pipe 56.
  • the other end of the air vent pipe 56 is connected to a discharge pipe 55 to which, for example, a siphon pipe is connected.
  • the air vent valve 561 is opened to feed the water to be treated to the primary side area while venting the air in the filtration device 100, and the primary side area is covered. Filtration can be efficiently restarted by closing the air vent valve 561 after replacement with treated water.
  • the operation of the air vent valve 561 can be controlled by the control unit 70. It is of course possible to configure the air vent pipe 56 as an air vent.
  • the 1st pump 10 has an output adjustment means (not shown) comprised, for example with an inverter. Thereby, when resuming filtration after backwashing, it is possible to gradually increase the discharge pressure of the pump and avoid damage to the filtration device due to the water hammer.
  • the filtration device 100 shown in FIG. 1 operates in an operation state as shown in FIGS. 2 (A) to (G).
  • FIGS. 2 (A) to (G). 2A to 2G for the sake of clarity, the first pump 10, the treated water pipe 52, the filtration unit 20, the treated water pipe 53, the treated water storage tank 30, and the treated water outlet in the filtration device 100 are shown. 31, only the siphon tube 40 and the flow switch 41 constituting the backwashing start detecting means are illustrated, and the remaining components are not shown.
  • the flow switch 41 constituting the backwashing start detecting means also functions as backwashing end detecting means.
  • FIG. 2A is a diagram illustrating a state during filtration of the filtration device 100.
  • the water flow of the treated water sent from the first pump 10 flows into the primary side region of the filtration unit 20 through the treated water piping 52 and becomes treated water through the filter medium on the secondary side. It flows into the region and is stored in the treated water storage tank 30 through the treated water pipe 53.
  • the treated water flows out from the treated water outlet 31.
  • a part of the water flow of the water to be treated that flows through the water pipe 52 to be treated flows into the siphon tube 40, and the water level in the siphon tube 40 gradually rises.
  • FIG. 1 the water flow of the treated water sent from the first pump 10 flows into the primary side region of the filtration unit 20 through the treated water piping 52 and becomes treated water through the filter medium on the secondary side. It flows into the region and is stored in the treated water storage tank 30 through the treated water pipe 53.
  • the treated water flows out from the treated water outlet 31.
  • a part of the water flow of the water to be treated
  • 2B is a diagram illustrating a state of the filtration device 100 immediately before starting backwashing.
  • the water level in the siphon tube 40 rises to the upper end position in the vertical direction of the siphon tube 40 due to an increase in pressure loss (an increase in differential pressure) in the filtration unit 20.
  • the control unit stops the first pump 10.
  • FIG. 2C is a diagram illustrating a state of the filtration device 100 immediately after the start of backwashing.
  • the water to be treated in the siphon tube 40 overflows beyond the top of the siphon tube 40 and reaches a position lower in the vertical direction than the treated water outlet 31 of the treated water storage tank 30.
  • Drawing 2 (D) is a figure showing the state of filtration device 100 under backwashing.
  • the treated water flowing out from the treated water storage tank 30 flows into the siphon tube 40 through the treated water pipe 53, the filtering unit 20, and the treated water pipe 52, and flows out from the siphon tube 40.
  • the first pump 10 is in a stopped state.
  • FIG. 2E is also a diagram showing the state of the filtration device 100 during backwashing. In this state, all of the treated water stored in the treated water storage tank 30 flows out and only exists in the filtration unit 20 at a low water level.
  • FIG. 2 (F) is a diagram showing the state of the filtration device 100 just before the end of backwashing.
  • the flow switch 41 which also serves as a backwashing end detection means, detects that there is no water flow having a certain range of flow velocity and flow rate. Thereafter, after a predetermined time has elapsed, the control unit controls to drive the first pump 10 and restarts filtration.
  • FIG. 2 (G) is a diagram showing the state of the filtration device 100 immediately after resumption of filtration.
  • the water flow of the treated water sent from the first pump 10 flows into the primary region of the filtration unit 20 through the treated water pipe 52.
  • the filtering unit 20 and the water pipe 52 to be treated after backwashing are filled with air, and the filtering material in the filtering unit 20 is moist, and it is difficult for air to escape through the filtering material.
  • the water to be treated cannot be efficiently filtered. For this reason, it is advantageous to provide the air vent pipe 56 and air vent valve 561 as shown in FIG.
  • the control unit opens the air vent valve 561 after resuming the driving of the first pump 10, vents the air in an open state for a predetermined time after resuming filtration, and then closes the air vent valve 561.
  • the predetermined time for opening the air vent valve 561 depends on the water supply speed of the first pump 10, but is, for example, 20 to 180 seconds after resumption of filtration.
  • the treated water is allowed to flow out from the air vent pipe 56 while leaving the air vent pipe 56 open, so that it remains on the primary side of the filtration unit 20. It is also possible to configure so as to eliminate the accumulated deposits.
  • the air vent valve 561 can be opened for a time longer than 180 seconds.
  • movement method of this filtration apparatus were demonstrated using an example, the operation
  • FIG. 1 although only one filtration unit is shown in FIG. 1, it is of course possible to provide a plurality of filtration units in the filtration device. Thereby, the amount of filtered water can be increased.
  • the filtration device of the present invention adopts a configuration in which raw water is pumped up by a pump and the filter medium is passed through and a siphon-type backwash mechanism is used in combination, so that the device structure is simple and operation management is easy, as well as efficiency. Backwashing is possible.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un dispositif de filtration qui comprend : une unité de filtration ayant un matériau de filtration ; une pompe ; une tuyauterie pour de l'eau à traiter, la tuyauterie reliant l'ouverture de refoulement de la pompe et l'unité de filtration ; un réservoir de stockage d'eau traitée ayant une sortie d'écoulement d'eau traitée ; une tuyauterie d'eau traitée pour relier le réservoir de stockage d'eau traitée et l'unité de filtration à un emplacement au-dessous de la sortie d'écoulement d'eau traitée ; un tuyau de siphon ayant une extrémité reliée à la tuyauterie pour l'eau à traiter et l'autre extrémité située au-dessous de la position verticale de la sortie d'écoulement d'eau à traiter, le tuyau de siphon s'étendant verticalement en direction d'une position supérieure à la position de la sortie d'eau à traiter selon une distance prédéterminée ; une unité de commande pour commander l'entraînement et l'arrêt de la pompe ; un moyen de détection de démarrage de nettoyage à contre-courant pour détecter le démarrage du nettoyage à contre-courant du matériau de filtration, le début du nettoyage à contre-courant étant initié par la formation d'un siphon ; et un moyen de détection d'achèvement de nettoyage à contre-courant pour détecter l'instant d'achèvement du nettoyage à contre-courant.
PCT/JP2014/005068 2013-10-08 2014-10-03 Dispositif de filtration WO2015052906A1 (fr)

Applications Claiming Priority (2)

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JP2013211155A JP2015073933A (ja) 2013-10-08 2013-10-08 ろ過装置
JP2013-211155 2013-10-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105536323A (zh) * 2016-02-26 2016-05-04 江苏大学 一种自动反冲洗滤网过滤器

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