WO2021117275A1 - Filtre à liquide et procédé de traitement de liquide - Google Patents

Filtre à liquide et procédé de traitement de liquide Download PDF

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Publication number
WO2021117275A1
WO2021117275A1 PCT/JP2020/025376 JP2020025376W WO2021117275A1 WO 2021117275 A1 WO2021117275 A1 WO 2021117275A1 JP 2020025376 W JP2020025376 W JP 2020025376W WO 2021117275 A1 WO2021117275 A1 WO 2021117275A1
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WIPO (PCT)
Prior art keywords
housing
liquid
layered double
double hydroxide
liquid filter
Prior art date
Application number
PCT/JP2020/025376
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English (en)
Japanese (ja)
Inventor
朝倉健夫
大野睦浩
草野正明
関口政一
Original Assignee
日本国土開発株式会社
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Application filed by 日本国土開発株式会社 filed Critical 日本国土開発株式会社
Priority to JP2021563740A priority Critical patent/JP7309120B2/ja
Publication of WO2021117275A1 publication Critical patent/WO2021117275A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B01D15/02—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor with moving adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption

Definitions

  • the present invention relates to a liquid filter using a layered double hydroxide and a liquid treatment method.
  • Layered double hydroxides are known to have an anion exchange effect.
  • arsenic, fluorine, boron, selenium, hexavalent chromium, nitrite ions, and other anionic harmful substances By immobilizing arsenic, fluorine, boron, selenium, hexavalent chromium, nitrite ions, and other anionic harmful substances by this anion exchange action, waste safety improvement technology and detoxification environment It is expected that the improvement technology can contribute to improving the quality of contaminated water, preventing the elution of harmful substances, improving the soil, and promoting the stabilization of harmful substances at waste disposal sites.
  • a layered double hydroxide to a filter (for example, Patent Document 1).
  • an object of the first invention and the third invention is to provide a liquid filter in which the housing is less likely to be clogged even if the layered double hydroxide collapses due to water flow or the like.
  • An object of the second invention is to provide a method for treating a liquid that can easily detect the replacement time of the layered double hydroxide supplied to the housing.
  • the liquid filter according to the first invention includes a housing containing a layered double hydroxide that adsorbs harmful substances contained in the liquid, and a moving device that moves the layered double hydroxide in the housing.
  • the method for treating a liquid according to the second invention includes a step of setting a height of a housing through which the liquid passes and a dimension in a direction intersecting the height of the housing, and a unit time of the liquid to be supplied to the housing.
  • a step of setting the supply amount per unit a step of setting the supply amount of the layered double hydroxide that adsorbs harmful substances contained in the liquid to the housing, and the layered double hydroxide by passing water through the liquid.
  • the liquid filter according to the third invention guides the housing containing the layered double hydroxide that adsorbs harmful substances contained in the liquid and the liquid supplied to the housing toward the discharge side of the housing. It is equipped with a pipe.
  • the moving device moves the layered double hydroxide
  • the clogging of the housing can be reduced.
  • the replacement time of the layered double hydroxide and the time when the clog in the housing is or is likely to occur are almost the same, the replacement time of the layered double hydroxide can be easily detected. can do.
  • the pipe guides the liquid toward the discharge side of the housing, the clogging of the housing can be reduced.
  • FIG. 1 is a schematic view showing the filtration device 100 of the first embodiment.
  • the filtration device 100 of the present embodiment includes a liquid filter 1, a supply unit 10 for supplying the liquid to be filtered to the liquid filter 1, and a discharge unit 20 for discharging the liquid filtered by the liquid filter 1.
  • a differential pressure gauge 30 that detects the differential pressure between the supply unit 10 and the discharge unit 20, a moving device 40 that moves the layered double hydroxide 3 described later, and a control device 50 that controls the entire filtration device 100. doing.
  • the liquid filter 1 has a housing 2 and a layered double hydroxide 3 housed in the housing 2.
  • a resin such as phenol resin or polypropylene resin or a metal such as stainless steel can be used.
  • the housing 2 has a supply unit side screwed portion that is screwed with the supply unit 10 and a discharge unit side screwed portion that is screwed with the discharge unit 20.
  • the size of the layered double hydroxide 3 is shown as a size that is easy to see, unlike the actual size.
  • the housing 2 of the present embodiment has a cylindrical shape, and as shown in FIG. 1, the dimension in the X direction is 3 to 8 times, preferably 4 to 5 times the dimension in the Y direction (dimension in the height direction). It is twice as large.
  • the linear velocity of the liquid supplied to the housing 2 can be lowered, so that the layered double hydroxides 3 are less likely to collapse, and the liquid filter 1 has a small particle size of the layered double hydroxides 3a. It is possible to prevent clogging due to the above.
  • the dimension of the housing 2 in the X direction is increased and the dimension of the housing 2 in the height direction is decreased, the space velocity (Space Velocity) of the liquid supplied to the housing 2 is increased. Therefore, the contact time of arsenic contained in the liquid supplied to the housing 2 in contact with the layered double hydroxide 3 is shortened, and arsenic may not be sufficiently adsorbed by the layered double hydroxide 3.
  • the dimension of the housing 2 in the Y direction is increased by 3 to 8 times, preferably 4 to 5 times, the dimension in the X direction, and arsenic and layered double hydroxides are provided.
  • the contact time with 3 may be lengthened.
  • the moving device 40 can also be applied to a housing whose dimension in the Y direction is larger than the dimension in the X direction.
  • the shape of the housing 2 is not limited to a cylindrical shape, and may be a conical shape or a rectangular shape.
  • the method for producing the layered double hydroxide 3 is disclosed in the international application number PCT / JP2017 / 046943 (WO2018 / 124,190), etc., which the applicant of the present application filed earlier. Therefore, although detailed description is omitted, an acidic solution containing divalent metal ions and trivalent metal ions and an alkaline solution are mixed to synthesize layered double hydroxides 3, and washing, filter pressing, drying, etc.
  • Granular layered double hydroxide 3 can be produced through each of the steps described above. The production control is performed so that the particle size of the granular layered double hydroxide 3 is preferably 0.5 to 1.2 mm rather than 0.4 mm to 1.5 mm in the present embodiment.
  • the layered double hydroxide 3 Since the granular layered double hydroxide 3 becomes muddy due to the passage of liquid water, the layered double hydroxide 3 before becoming muddy and muddy (for example, having a particle size of 0.3 mm or less) is moved. It is preferable to move by 40 (details will be described later).
  • the supply unit 10 supplies a liquid containing a harmful substance such as arsenic to the housing 2 from a water source such as a container or a well (not shown).
  • the supply unit 10 supplies the liquid in the range of 3 liters to 12 liters per hour, but the amount of the liquid supplied from the supply unit 10 depends on the size (volume) of the housing 2. It can be decided as appropriate.
  • one supply unit 10 is provided on the right end side in FIG. 1, a plurality of supply units 10 may be provided, and the mounting position of the supply unit 10 can be arbitrarily set.
  • the supply unit 10 may include a diffusion unit such as a shower head so that the liquid supplied into the housing 2 diffuses in the X direction.
  • the diffusion unit is preferably provided on the housing 2 side of the supply unit 10. This makes it possible to prevent the liquid supplied from the supply unit 10 from being adsorbed only by the layered double hydroxide 3 at a specific location.
  • the discharge unit 20 discharges the liquid after arsenic is adsorbed by the layered double hydroxide 3 to the outside of the housing 2. It is preferable that the discharge unit 20 is provided with a filter that prevents the layered double hydroxide 3 from passing through so that the layered double hydroxide 3 is not discharged from the discharge unit 20.
  • the filter may be formed with an opening through which the layered double hydroxide 3a having a small particle size and the muddy layered double hydroxide 3 pass.
  • the filter may be formed with an opening that does not allow the layered double hydroxide 3a having a small particle size to pass through, but allows the layered double hydroxide 3 that has become muddy to pass through.
  • one discharge unit 20 is provided on the left end side in FIG.
  • a plurality of discharge units 20 may be provided, and the mounting position of the discharge unit 20 can be arbitrarily set.
  • the liquid is supplied from above the housing 2 and discharged from below the housing 2, but the liquid may be supplied from below the housing 2 and discharged from above the housing 2.
  • a plurality of valves may be switched to switch between supply and discharge.
  • the differential pressure gauge 30 measures the pressure difference between the pressure of the liquid flowing through the supply unit 10 and the liquid flowing through the discharge unit 20.
  • One end of the differential pressure gauge 30 is connected to the supply unit 10, the other end is connected to the discharge unit 20, and the measurement result is output to the control device 50.
  • the differential pressure measured by the differential pressure gauge 30 is small, clogging due to the collapse of the layered double hydroxide 3 does not occur, while when the differential pressure measured by the differential pressure gauge 30 is large, the layered double hydroxide is water. It is considered that clogging has occurred due to the collapse of the oxide 3, or clogging may occur.
  • the housing 2 when a differential pressure of 100 KPa or more or 150 KPa or more is generated, the housing 2 may be clogged or may be clogged.
  • a differential pressure that should be determined to be clogged in the housing 2 may be set according to the pressure resistance of the housing 2.
  • the moving device 40 moves the layered double hydroxide 3 so that the housing 2 is not clogged.
  • the moving device 40 may be any device that can vibrate the housing 2 in the vertical direction (Y-axis direction), for example, an ultrasonic vibrator that generates ultrasonic vibration, a MEMS vibrator, or the like. May be used.
  • Y-axis direction vertical direction
  • the moving devices 40 may be provided on the lower surface of the housing 2, but the number of the moving devices 40 can be arbitrarily set, and the moving devices 40 may be provided on the side surface or the upper surface of the housing 2.
  • the moving device 40 may be one that can generate vibration in the left-right direction (X-axis direction).
  • the moving device 40 may be provided in the housing 2.
  • FIG. 2 is a schematic view showing the inside of the housing 2 after driving the moving device 40.
  • the shape of the upper layered double hydroxide 3 is deformed by the passage of liquid, and there are many layered double hydroxides 3a having a small particle size on the upper side.
  • the layered double hydroxide 3a having a small particle size is diffused, so that the housing caused by the layered double hydroxide 3a having a small particle size It is possible to reduce the occurrence of clogging in 2.
  • the mobile device 40 can also be configured by deforming the supply unit 10 and the discharge unit 20.
  • FIG. 3 is a diagram showing a modified example of the supply unit 10 (discharge unit 20), and since the configuration is the same, the description will be continued using the supply unit 10 as an example.
  • the supply unit 10 is connected to a container (not shown) that stores a liquid containing a harmful substance via a supply valve 11, and after arsenic is adsorbed by the layered double hydroxide 3 via the discharge valve 12. Is connected to a pipe that discharges the liquid of the above to the outside of the housing 2. Further, the supply valve 11 and the discharge valve 12 are connected to the control device 50.
  • the control device 50 switches the supply valve 11 of the supply unit 10 from the open state to the closed state to stop the supply of the liquid, and the discharge valve 12 of the supply unit 10. Is switched from the closed state to the open state so that the liquid in the housing 2 can be discharged from the supply unit 10 using a pump (not shown). Further, the control device 50 switches the discharge valve 12 of the discharge unit 20 from the open state to the closed state to stop the discharge of the liquid, and switches the supply valve 11 of the discharge unit 20 from the closed state to the open state to the discharge unit 20.
  • the liquid can be supplied to the housing 2 by using a pump (not shown).
  • control device 50 supplies the liquid from the lower side of the housing 2 and discharges the liquid after the arsenic is adsorbed by the layered double hydroxide 3 from the upper side of the housing 2 to the outside of the housing 2.
  • the layered double hydroxide 3a having a small particle size diffuses in the housing 2, so that clogging in the housing 2 occurs. Can be reduced.
  • the moving device 40 using the vibrator and the moving device 40 using the supply valve 11 and the discharge valve 12 may be used in combination.
  • the supply unit 10 and the discharge unit 20 are provided on the upper surface of the housing 2, and the supply unit 10 and the discharge unit 20 are provided on the lower surface of the housing 2, so that the layered double hydroxide 3a having a small particle size is provided. May be diffused in the housing 2. In this case as well, it may be used in combination with the moving device 40 using the vibrator.
  • the control device 50 includes a CPU that performs various arithmetic processes and a memory that stores programs and data, and controls the entire filtration device 100.
  • the control device 50 performs control for reducing clogging in the housing 2 such as switching control for the supply valve 11 and the discharge valve 12 described above, and control for replacement of the layered double hydroxide 3.
  • FIG. 4 is a flowchart of the filtration process by the control device 50, and the description will be continued below based on the flowchart of FIG.
  • N the parameter indicating the number of times the mobile device 40 is driven
  • the control device 50 starts timing at the timing when the layered double hydroxide 3 is supplied to the housing 2 and a liquid containing arsenic or the like is passed through the housing 2 (step S1).
  • the control device 50 may store the date and time when the water flow starts instead of the timekeeping. In either case, it is sufficient to know the total time for passing water. Further, when the water flow is not continuously performed, the control device 50 may stop the time counting at the end of the water flow and restart the time measurement at the restart of the water flow.
  • the control device 50 measures with a differential pressure gauge 30 when a liquid containing arsenic or the like is flowing, and determines whether or not the differential pressure between the supply unit 10 and the discharge unit 20 is equal to or less than the threshold value (step S2).
  • the threshold value is set to 150 KPa, and the control device 50 repeats step S2 on the assumption that the housing 2 is not clogged when the differential pressure by the differential pressure gauge 30 is 150 KPa or less.
  • the control device 50 proceeds to step S3 on the assumption that clogging in the housing 2 may occur or may occur when the differential pressure by the differential pressure gauge 30 exceeds 150 KPa.
  • the control device 50 drives the moving device 40 to diffuse the layered double hydroxide 3a (see FIG. 1) having a small particle size located in the upper part of the housing 2 (step S3). ).
  • the moving device 40 one using an oscillator, one using a supply valve 11 and a discharge valve 12, and one having a supply unit 10 and a discharge unit 20 on each of the upper surface and the lower surface are driven individually or in combination as appropriate. can do.
  • the control device 50 determines whether or not the differential pressure has become equal to or lower than the threshold value due to the driving of the moving device 40 (step S4).
  • the control device 50 repeats the determination in step S4 until the differential pressure becomes equal to or less than the threshold value.
  • the control device 50 filters when the differential pressure does not fall below the threshold value even when the moving device 40 is driven for a predetermined time (for example, 5 to 60 minutes), the differential pressure does not decrease, or the differential pressure increases. It may be determined that the device 100 has some abnormality.
  • the control device 50 may stop the water flow or replace the layered double hydroxide 3 because the adsorption performance of the layered double hydroxide 3 has deteriorated.
  • the description will be continued on the assumption that the differential pressure becomes equal to or less than the threshold value due to the driving of the moving device 40.
  • the control device 50 stops driving the mobile device 40 (step S5), increases the number of times N of the mobile device 40 is driven by one (N ⁇ N + 1), and stores it in the memory (step). S6).
  • the reason why the control device 50 stores the drive count N of the mobile device 40 in the memory is to determine the replacement time of the layered double hydroxide 3.
  • the control device 50 determines whether to replace the layered double hydroxide 3 (step S7).
  • 1 kg of the layered double hydroxide 3 can adsorb arsenic contained in 6000 to 8000 liters of liquid.
  • the control device 50 may determine the replacement time of the layered double hydroxide 3 based on the time counting time acquired in step S1.
  • control device 50 may determine the replacement time of the layered double hydroxide 3 based on the number of times N of the moving device 40 is driven and the driving time of the moving device 40. .. When the determination is made using the drive time of the mobile device 40, the time from the start to the stop of the drive may be measured and totaled each time the mobile device 40 is driven.
  • the filtration device 100 is equipped with various communication devices such as wireless communication and wired communication, weather information such as temperature, humidity, and rainfall can be obtained, and the above-mentioned correction coefficient can be set or changed.
  • weather information such as temperature, humidity, and rainfall
  • the above-mentioned correction coefficient can be set or changed.
  • the arsenic concentration is often caused by a water source such as a well, it is possible to store water source data such as which water source the liquid is from and position information in a memory and reflect it in the above correction coefficient. Good.
  • the differential pressure does not fall below the threshold value even after a predetermined time elapses, the differential pressure does not decrease, or the differential pressure does not decrease. May be used when becomes high. That is, the volume and shape of the housing 2, the supply amount of the layered double hydroxide 3 supplied to the housing 2, and the supply amount of the liquid supplied from the supply unit 10 are set, and the layered double hydroxide 3 is provided. It suffices to make the replacement time substantially coincide with the time when the inside of the housing 2 is or is likely to be clogged. In this case, the moving device 40 can be omitted.
  • the control device 50 drives the moving device 40 to drive the layered double hydroxide.
  • the replacement time of 3 may be made to coincide with the time when the inside of the housing 2 is or is likely to be clogged.
  • the control device 50 may drive the moving device 40 based on the differential pressure of the differential pressure gauge 30, or may drive the moving device 40 based on the liquid water flow time or the liquid water flow amount.
  • the replacement time of the layered double hydroxide 3 and the time when clogging in the housing 2 is or is likely to occur are substantially the same, the replacement time of the layered double hydroxide 3 is set to the first (1) in the housing 2. It may be the time when the clogging of the second time) occurs or is likely to occur, or it may be the time when the second and subsequent clogging occurs or is likely to occur.
  • step S7 If the determination in step S7 is Yes, the control device 50 performs various processes for exchanging the layered double hydroxide 3 and the layered double hydroxide 3a having a small particle size (step S8), and ends this flowchart. ..
  • the control device 50 determines the replacement time of the layered double hydroxide 3 according to the measurement result of the differential pressure gauge 30, so that the liquid filter 1 that is easy to use is realized. can do. Further, since the control device 50 determines the replacement time of the layered double hydroxide 3 based on at least one of the drive time of the mobile device 40 and the number of times the mobile device 40 is driven, the liquid filter 1 that is easy to use is realized. can do.
  • the dimension in the height direction (Y direction) of the housing 2 and the dimension in the direction intersecting the height direction (X direction) are set, and the liquid to be supplied to the housing 2 is supplied per unit time.
  • the amount is set, the amount of the layered double hydroxide 3 supplied to the housing 2 is set, and the layered double hydroxide is clogged when the housing 2 is clogged due to the change in the shape of the layered double hydroxide 3 due to the passage of liquid.
  • the hydroxide 3 is being replaced.
  • the layered double hydroxide 3 can be replaced at an appropriate timing without providing a sensor for detecting the deterioration of the adsorption performance of the layered double hydroxide 3.
  • the housing 2 can also be applied to a housing whose dimension in the Y direction is larger than the dimension in the X direction.
  • FIG. 5 is a schematic view showing the filtration device 100 of the second embodiment, and in the second embodiment, the housing 2 is provided at an angle.
  • the space velocity of the fluid can be reduced by tilting the housing 2 by 3 to 40 degrees, preferably 5 to 30 degrees.
  • the time for the arsenic contained in the liquid to come into contact with the layered double hydroxide 3 can be lengthened as compared with the case where the housing 2 is not tilted. If the angle at which the housing 2 is tilted is less than 3 degrees, the time for arsenic to come into contact with the layered double hydroxide 3 is not so long, and if the angle at which the housing 2 is tilted exceeds 40 degrees, the speed at which the liquid heads toward the discharge unit 20 increases. It gets too fast. As described above, according to the second embodiment, it is possible to realize the liquid filter 1 capable of efficiently adsorbing arsenic.
  • FIG. 6 is a schematic view showing a modified example of the second embodiment, and is provided with a second discharge portion 21 for discharging the muddy layered double hydroxide 3 to the outside of the housing 2.
  • the muddy layered double hydroxide 3 tends to accumulate on the upper part of the housing 2, and when the housing 2 is tilted as in the present embodiment, it moves to the left side of FIG. 6 according to the tilt. Therefore, in this modification, the mud-like layered double hydroxide 3 is passed through the left end of the upper part of the housing 2 (one end on the lower side of the housing 2), and the non-mud-like layered double hydroxide is passed.
  • the second discharge unit 21 is a pipe member, and in this modified example, it is connected to the discharge unit 20 to discharge the muddy layered double hydroxide 3 to the outside of the housing 2, but the discharge unit 20 is It may be an independent discharge pipeline.
  • the opening formed at the left end of the upper part of the housing 2 may be sized so as to allow the layered double hydroxide 3a having a small particle size to pass through.
  • the moving device 40 may be omitted.
  • the second discharge unit 21 of this modification may be applied to the first embodiment.
  • the second discharge portion 21 may be provided at either the left end or the right end of the housing 2, or may be provided at both the left end and the right end of the housing 2.
  • the muddy layered double hydroxide 3 can be discharged, so that the clogging of the housing 2 can be reduced.
  • FIG. 7 is a schematic view showing the filtration device 100 of the third embodiment, in which a moving device 40 is provided in the housing 2 and a second supply unit 60 for supplying a new layered double hydroxide 3 to the housing 2. Is provided. Further, in the present embodiment, the muddy layered double hydroxide 3 and the layered double hydroxide 3a having a small particle size are passed through, and the other layered double hydroxide 3 is not passed through the selection unit 5.
  • a third discharge section 22 is provided for discharging the muddy layered double hydroxide 3 that has passed through the selection section 5 and the layered double hydroxide 3a having a small particle size to the outside of the housing 2.
  • the illustration of the differential pressure gauge 30 is simplified.
  • the moving device 40 of the present embodiment includes a belt conveyor 41 and a roll member 42 that drives the upper surface of the belt conveyor 41 in the direction of an arrow in the drawing.
  • the belt conveyor 41 only needs to be able to convey the muddy layered double hydroxide 3 and the layered double hydroxide 3a having a small particle size, and for example, a hole smaller than that of the layered double hydroxide 3a having a small particle size is formed. It can be in the form of a mesh. In this case, it is desirable that the mesh-shaped belt conveyor 41 determines the mesh count so that the muddy layered double hydroxide 3 can also be conveyed.
  • the roll member 42 is made of resin or metal, and is rotated counterclockwise by a motor (not shown) to repeatedly drive the upper surface of the belt conveyor 41 in the direction of the arrow.
  • the selection unit 5 is a plate-shaped member extending in the Y direction, and allows the layered double hydroxide 3a having a small particle size and the muddy layered double hydroxide 3 to pass through, while the other layered double hydroxides. It has an opening of a size that does not allow the object 3 to pass through. Therefore, the layered double hydroxide 3a having a small particle size and the muddy layered double hydroxide 3 conveyed by the belt conveyor 41 pass through this opening and are conveyed to the disposal portion 2a of the housing 2.
  • the third discharge section 22 is provided below the disposal section 2a, the layered double hydroxide 3a having a small particle size and the muddy layered double hydroxide 3 are placed in the housing 2. Can be disposed of externally.
  • the size of the opening of the selection unit 5 may be set so that the layered double hydroxide 3a having a small particle size is not discharged from the third discharge unit 22.
  • the control device 50 may rotate a motor (not shown) clockwise to drive the upper surface of the belt conveyor 41 in the direction opposite to the arrow direction. Further, it is preferable to provide the selection unit 5, the disposal unit 2a, and the discharge unit 20 on the right end side of the housing 2. The opening of the selection unit 5 is made smaller so that the layered double hydroxide 3a having a small particle size does not pass through the selection unit 5, but the muddy layered double hydroxide 3 passes through the selection unit 5. It may be.
  • the second supply unit 60 has a supply path 61 for supplying the new layered double hydroxide 3, and a valve 62 connected to the control device 50.
  • the control device 50 can periodically control the valve 62 from the closed state to the open state to supply the housing 2 with the new layered double hydroxide 3.
  • the muddy layered double hydroxide 3 is discharged to the outside of the housing 2, while a new layered double hydroxide 3 is provided to the housing 2, so that the housing 2 is more clogged. Can be reduced.
  • the differential pressure gauge 30 may be omitted, or the second supply unit 60 may be omitted.
  • the disposal unit 2a, the selection unit 5, the mobile device 40, and the second supply unit 60 of the third embodiment can also be applied to the second embodiment.
  • FIG. 8 is a schematic view showing the filtration device 100 of the fourth embodiment.
  • the housing 2 has a dimension in the Y direction larger than a dimension in the X direction.
  • the valve 13 is provided in the supply unit 10. The valve 13 is switched between the open state and the closed state by the air pressure from a compressor (not shown), and the liquid is supplied to the housing 2 when the valve 13 is in the open state, and the liquid is not supplied to the housing 2 when the valve 13 is in the closed state. There is.
  • a part of the valve 13 is designed so that the color is switched between the open state and the closed state.
  • the color is a color that calls attention such as yellow or red, and can be identified from the outside. You can do it.
  • the control device 50 opens the valve 13 from the open state to the closed state when the replacement time of the layered compound hydroxide 3 coincides with the time when the inside of the housing 2 is or is likely to be clogged.
  • the supply of the liquid to the housing 2 is stopped by switching to.
  • a part of the valve 13 changes to a color that calls attention, so that it is possible to notify the replacement time of the layered double hydroxide 3.
  • a sound may be generated to call attention.
  • FIG. 9 is a schematic view showing the filtration device 100 of the fifth embodiment.
  • the pipe 6 guides the liquid supplied from the supply unit 10 to the middle or lower side of the housing 2 along the Y direction of the housing 2.
  • resin, metal, or the like can be used as the material of the pipe 6.
  • one end (upper side) of the pipe 6 is located above the layered double hydroxide 3. This is to prevent the pipe 6 from being clogged by preventing the layered double hydroxide 3a having a small particle size and the muddy layered double hydroxide 3 from entering the inside of the pipe 6.
  • one end (upper side) of the pipe 6 is located above the liquid surface.
  • the pipe 6 has a larger number of holes 7 on the other end side (lower side) than on one end side (upper side), and is 5 mm to 50 mm, preferably about 5 mm to 25 mm from one end (upper side). Until then, the hole 7 is not formed. This is to prevent the liquid supplied from the supply unit 10 from being supplied to the upper part of the housing 2.
  • the liquid supplied from the supply unit 10 is supplied to the lower side of the housing 2 by the pipe 6 and the hole portion 7 provided in the pipe 6, a layer having a small particle size in the upper part of the housing 2 is supplied.
  • the double hydroxide 3a is less likely to become muddy, and the housing 2 is less likely to be clogged.
  • the size of the pore portion 7 is preferably smaller than the size of the layered double hydroxide 3 and the layered double hydroxide 3a having a small particle size. This makes it possible to prevent the pipe 6 from being clogged with the layered double hydroxide 3 or the layered double hydroxide 3a having a small particle size. Further, if the size of the hole 7 is made larger near the center (middle in the Y direction) or near the outlet (lower in the Y direction) of the pipe than on the inlet side (upper part in the Y direction) of the pipe 6, the size of the hole 7 is increased from the supply part 10. The supplied liquid can be guided to the middle or lower part of the housing 2.
  • the size of the hole 7 may be larger near the center of the pipe 6 than near the outlet side of the pipe 6. Further, in the fifth embodiment, since the inner diameter of the pipe 6 is larger than the size of the hole 7, the amount of the liquid discharged from one hole 7 is the amount of the liquid discharged from the lower part of the pipe 6. It is less than the amount of emissions.
  • the number of pipes 6 may be one or three or more.
  • the layered double hydroxide 3a having a small particle size becomes muddy, it may become muddy by about T cm (for example, 5 cm) from the upper layer. Therefore, when a plurality of pipes 6 are provided, the two pipes 6 are separated by the muddy layered double hydroxide 3 by providing them at intervals of 2 T cm (for example, 10 cm) or more in the X direction. You can prevent it from getting clogged.
  • T cm for example, 10 cm
  • a plurality of pipes 6 are provided, they are preferably provided at substantially equal intervals, and may be arranged so as to be radial, for example.
  • the length of the pipe 6 in the Y direction can be arbitrarily set, and the length of the housing 2 may be set to near the center of the Y direction, or may be set to the vicinity of the lower part of the pipe 6 in the Y direction. Good.
  • the plurality of pipes 6 may have the same length.
  • the holding member 8 is a member that holds the pipe 6, and may have any shape as long as the pipe 6 can be held, and a resin, metal, or the like can be used as the material.
  • a resin net member may be used as the holding member 8 to hold the pipe 6 in the mesh.
  • the pipe 6 can be held by utilizing the elastic deformation of the net member.
  • one holding member 8 can hold a plurality of holding members 8. In FIG. 9, the holding member 8 holds the pipe 6 at one place, but a plurality of holding members 8 may be provided at a distance in the Y direction to hold the pipe 6 at a plurality of places.
  • the pipe 6 guides the liquid supplied from the supply unit 10 to the lower part of the housing 2, the muddy layered double hydroxide 3 is formed only on the upper part of the housing 2. Can be prevented. Thereby, it is possible to reduce the clogging of the housing 2. Further, by adjusting the number, length, diameter, number of holes 7 and the like of the pipe 6, the time when the layered double hydroxide 3 is replaced and the time when the inside of the housing 2 is clogged or is likely to occur. If the above are substantially the same, the replacement time of the layered double hydroxide 3 can be easily detected based on the measurement result of the differential pressure gauge 30.
  • the moving device 40 may be driven in order to substantially coincide with the time when the layered double hydroxide 3 is replaced and the time when the housing 2 is clogged or is likely to be clogged.
  • any mobile device 40 of the first to fourth embodiments may be used. If the replacement time of the layered double hydroxide 3 and the time when the clogging in the housing 2 occurs or is likely to occur can be substantially coincided with each other without using the moving device 40, the moving device It is also possible to omit 40.
  • FIG. 10 is a schematic view of a filtration device 100 showing a modified example of the fifth embodiment.
  • the inner diameter of the pipe 6 is larger than the size of the hole 7, the amount of liquid discharged from the lower part of the pipe 6 is large, and the layered double hydroxide having a small particle size near the lower part of the pipe 6 is discharged.
  • the hydroxide 3a may become muddy.
  • the liquid guided to the lower part of the housing 2 by the pipe 6 is close to the discharge portion 20, the liquid discharged from the lower part of the pipe 6 has a shorter contact time with the layered double hydroxide 3, and arsenic. May not be sufficiently adsorbed by the layered double hydroxide 3.
  • the shape of the pipe 6 is tapered so that the outer diameter and the inner diameter become smaller toward the lower part of the pipe (toward the discharge portion 20). Therefore, in this modification, the amount of liquid discharged from the lower part of the pipe 6 can be reduced as compared with the fifth embodiment, so that the layered double hydroxide having a small particle size near the lower part of the pipe 6 can be reduced. It is possible to reduce the muddy state of 3a. Further, since the amount of the liquid discharged from the lower part of the pipe 6 is reduced, the amount of the liquid having a short contact time with the layered double hydroxide 3 can be reduced. Even when the inner diameter of the pipe 6 is tapered, the inner diameter of the lower portion of the pipe 6 is preferably equal to or larger than the size of the hole 7.
  • a flow meter may be provided in the supply unit 10 and the discharge unit 20 instead of the differential pressure gauge 30, and whether the housing 2 is clogged due to the difference between the flow rate flowing through the supply unit 10 and the flow rate flowing through the discharge unit 20. May be judged.
  • the liquid filter 1 may be a cartridge exchange type.
  • the supply valve 11, the discharge valve 12, the valve 13 and the valve 62 may be an air valve or an electromagnetic valve. Further, the first to fifth embodiments may be combined as appropriate.
  • Liquid filter 2 Housing 3 Layered compound hydroxide 3a Small particle size layered compound hydroxide 10 Supply part 11 Supply valve 12 Discharge valve 20 Discharge part 30 Differential pressure gauge 40 Moving device 50 Control device 100 Filtering device

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'objet de la présente invention est de réduire l'encrassement d'un filtre lorsqu'un hydroxyde double en couches se rompt en raison de l'écoulement de l'eau; l'invention concerne un filtre à liquide comprenant un boîtier contenant un hydroxyde double en couches pour adsorber une substance nocive contenue dans un liquide et un dispositif mobile pour déplacer l'hydroxyde double en couches disposé à l'intérieur du boîtier.　
PCT/JP2020/025376 2019-12-12 2020-06-26 Filtre à liquide et procédé de traitement de liquide WO2021117275A1 (fr)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6211510A (ja) * 1985-07-10 1987-01-20 Kinzoku Kogyo Jigyodan 固液流動接触装置
JPS62204806A (ja) * 1986-03-05 1987-09-09 Sumitomo Chem Co Ltd 吸着剤による有価物の捕集方法
JP2004167404A (ja) * 2002-11-20 2004-06-17 Clusterone Corporation:Kk 浄水器
JP2005306667A (ja) * 2004-04-21 2005-11-04 Univ Waseda 結晶質層状複水酸化物粉末とその製造方法並びに成型体及び有害物質の固定化方法
WO2008059618A1 (fr) * 2006-11-17 2008-05-22 Jdc Corporation Appareil de traitement d'un liquide, et procédé de traitement d'un liquide, à l'aide d'une substance granulaire de type hydrotalcite
JP2010214233A (ja) * 2009-03-13 2010-09-30 Toshiba Corp 排水の吸着装置
JP2010279915A (ja) * 2009-06-05 2010-12-16 Toshiba Corp 吸着装置
JP2015037762A (ja) * 2011-12-12 2015-02-26 株式会社エコファースト 浄水装置及び浄水装置管理システム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6211510A (ja) * 1985-07-10 1987-01-20 Kinzoku Kogyo Jigyodan 固液流動接触装置
JPS62204806A (ja) * 1986-03-05 1987-09-09 Sumitomo Chem Co Ltd 吸着剤による有価物の捕集方法
JP2004167404A (ja) * 2002-11-20 2004-06-17 Clusterone Corporation:Kk 浄水器
JP2005306667A (ja) * 2004-04-21 2005-11-04 Univ Waseda 結晶質層状複水酸化物粉末とその製造方法並びに成型体及び有害物質の固定化方法
WO2008059618A1 (fr) * 2006-11-17 2008-05-22 Jdc Corporation Appareil de traitement d'un liquide, et procédé de traitement d'un liquide, à l'aide d'une substance granulaire de type hydrotalcite
JP2010214233A (ja) * 2009-03-13 2010-09-30 Toshiba Corp 排水の吸着装置
JP2010279915A (ja) * 2009-06-05 2010-12-16 Toshiba Corp 吸着装置
JP2015037762A (ja) * 2011-12-12 2015-02-26 株式会社エコファースト 浄水装置及び浄水装置管理システム

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