WO2007004261A1 - Filtre - Google Patents

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Publication number
WO2007004261A1
WO2007004261A1 PCT/JP2005/012110 JP2005012110W WO2007004261A1 WO 2007004261 A1 WO2007004261 A1 WO 2007004261A1 JP 2005012110 W JP2005012110 W JP 2005012110W WO 2007004261 A1 WO2007004261 A1 WO 2007004261A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
filter element
filter
stock solution
casing
Prior art date
Application number
PCT/JP2005/012110
Other languages
English (en)
Japanese (ja)
Inventor
Kiyotaka Sugiura
Kohji Hattori
Hiroyuki Oyachi
Original Assignee
Ngk Insulators, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ngk Insulators, Ltd. filed Critical Ngk Insulators, Ltd.
Priority to PCT/JP2005/012110 priority Critical patent/WO2007004261A1/fr
Publication of WO2007004261A1 publication Critical patent/WO2007004261A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • B01D63/066—Tubular membrane modules with a porous block having membrane coated passages
    • 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
    • B01D65/003—Membrane bonding or sealing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/04—Specific sealing means
    • B01D2313/041—Gaskets or O-rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/12—Specific discharge elements

Definitions

  • the present invention relates to a filter for water purification, and more particularly to a filter that can prevent a suspended substance or the like from being clogged in a cell when a filter element is backwashed.
  • a hollow fiber membrane filter is a filter element in which a plurality of hollow fibers are used as a filter medium, and has a capillary-shaped partition wall made of porous resin, and the central portion is penetrated by the partition wall.
  • a cell is formed.
  • the liquid to be treated raw solution
  • the partition made of porous resin flows into the cell penetrating the center of the hollow fiber.
  • harmful substances such as suspended substances and pathogenic microorganisms are removed in the partition wall, and the liquid flowing into the cell can be recovered as a purified treated liquid (filtrate). That is, the cell formed by the partition wall is used as a filtrate flow path for allowing the filtrate to flow through the hollow fiber membrane filter.
  • the monolithic filter 31 shown in FIG. 4 is a filter element in which a ceramic porous body is used as a filter medium, and a large number of cells 32 are formed so that the liquid flow directions are parallel to each other.
  • This filter element has a grid-like partition wall that also has ceramic porous body strength.
  • a no-cam structure is formed in which a large number of divided cells 32 are formed.
  • the liquid to be treated raw solution
  • the liquid permeates the partition walls that also have ceramic porous body strength and flows out of the cells.
  • the cell 32 formed by the partition is used as a stock solution flow path through which the stock solution is circulated.
  • the filter element When the above filter element is used for microfiltration or ultrafiltration, the filter element is often used in the form of a filter in which the filter element is built in the casing.
  • Each of the above filter elements has a structure in which the stock flow path and the filtrate flow path are separated by a partition wall, although there is a difference between the force used to use the cell as the filtrate flow path and the use as the stock flow path. ing. Therefore, by separating the filtrate only, the filter element is built in the casing, and the raw material flow path and the filtrate flow path are separated from each other by a sealing material such as an O-ring. It becomes possible to collect.
  • the filter element is built in the casing so that the liquid flows in the vertical direction.
  • Patent Document 1 Japanese Patent Laid-Open No. 7-251041
  • the cell diameter (cell hole diameter) is Because of its small size, there was a problem that suspended substances and the like were easily clogged in the cell.
  • the present invention has been made in view of the above-described problems, and when suspended substances and the like deposited on the partition wall by filtration operation are separated by backwashing, the cells are clogged with the separated suspended substances and the like.
  • the filter for water purification which can suppress water is provided.
  • the present invention provides the following filter.
  • the filter element is built in the casing so as to circulate in the vertical direction and can filter the liquid to be treated (raw solution), wherein the filter element has the cell at one end ( When the liquid to be treated (raw solution) is filtered, it is formed so that the diameter decreases in a tapered manner from one end of the cell to the other end.
  • the stock solution flows into the cell from the end side of the cell, and the foreign matter accumulated on the partition wall in the cell during backwashing can be discharged to the one end side of the cell.
  • Remento filter that is built in the casing.
  • a stock solution supply port through which the casing can supply a stock solution to the filter element, a filtrate delivery port through which a treated liquid (filtrate) can be sent from the filter element, and the stock solution from the filter element The filter according to [1] or [2], wherein a stock solution discharge port capable of discharging water is formed.
  • the filter element is a monolithic filter element in which a large number of cells are formed so as to have a ceramic porous body force and the liquid flow direction is parallel. [1] to [3] ], The filter according to any one of the above.
  • the filter of the present invention is configured so that when the stock solution is filtered, the stock solution flows into the cell from the end of the cell having a large diameter and one side (one end of the cell).
  • the suspended solids accumulated on the inner wall surface of the cell can be discharged from the one end side.
  • the diameter of the cell Since the directional force increases toward the end of the discharge side, it is possible to prevent the cells from being clogged with the suspended solids discharged during backwashing.
  • FIG. 1 is a cross-sectional view schematically showing an embodiment of a filter according to the present invention.
  • FIG. 2 is a partial cross-sectional view schematically showing one cell of a filter element constituting one embodiment of the filter of the present invention.
  • FIG. 3 is a perspective view schematically showing a filter element constituting one embodiment of the filter of the present invention.
  • FIG. 4 is a perspective view schematically showing one embodiment of a filter element.
  • FIG. 5 is an explanatory view schematically showing one embodiment of a seal cap, in which FIG. 5 (a) is a top view and FIG. 5 (b) is a cross-sectional view taken along line AA ′ in FIG. 5 (a). It is.
  • FIG. 6 is an explanatory view schematically showing the usage state of the seal cap, in which FIG. 6 (a) is a top view and FIG. 6 (b) is a cross-sectional view taken along line AA ′ of FIG. 6 (a).
  • FIG. 1 is a cross-sectional view schematically showing one embodiment of a filter according to the present invention.
  • an embodiment of the filter of the present invention is composed of a filter element 3 and a casing 2 in which the filter element 3 can be built, and the filter element 3 circulates liquid in the vertical direction G.
  • the filter element 3 constituting the filter 1 has a cell 4 with a diameter that tapers from one end 4b (one end of the cell) to the other end 4a (the other end of the cell). It is formed so that it can be shortened.
  • the filter element 3 is built in the casing 2 so that (suspended material etc.) can be discharged to one end 4b side of the cell.
  • the filter 1 according to the present embodiment is configured such that the stock solution flows in the vertical direction G lower side of the filter 1 toward the upper side, so that the filter element 3 is placed on one end 4b side of the cell.
  • the stock solution is supplied from the stock solution supply port 5 of the bottom cap 13 into the cell 4 of the filter element 3 at a predetermined pressure. Then, the undiluted solution is filtered when passing through the partition walls partitioning the cell, and is formed between the outer peripheral surface 3a of the filter element 3 and the outer peripheral surface 3a of the filter element 3 and the inner peripheral surface 11a of the casing body 11. It flows out into the space 18 as filtrate. This filtrate is stored in the space 18 and finally recovered from the filtrate outlet 6 of the casing body 11.
  • the diameter of one end of the cell is the same as the diameter of the other end, or on the side from which flushing water or compressed air for backwashing is discharged.
  • the diameter of one end of a cell is smaller than the diameter of the other end, there is a problem that suspended substances and the like are clogged in the cell before the cell force is also discharged outside.
  • the present embodiment In the filter, the cell is formed so that its diameter decreases in a tapered manner from one end portion (the end portion on the side where washing water or compressed air for backwashing is discharged) to the other end portion. Therefore, it is possible to prevent clogging of the cell.
  • filter element means a cell having a partition wall that also has a porous physical strength, and a cell that becomes a liquid flow path is formed by the partition wall.
  • the suspended solution or Harmful substances such as pathogenic microorganisms are removed, and the liquid flowing into the cell or the liquid flowing out of the cell can be recovered as a purified treated liquid (filtrate).
  • toxic substances foreign substances
  • foreign substances such as suspended solids and pathogenic microorganisms accumulate on the partition walls in the filter element cell.
  • the material constituting the filter element is preferably a ceramic porous body.
  • Ceramics constituting the filter element include, for example, alumina (Al 2 O 3), titanium
  • TiO 2 TiO 2
  • mullite Al 2 O 3 .SiO 2
  • zirconia ZrO 2
  • Alumina is preferably used because it can form a stable slurry that can easily be obtained from a raw material with a controlled particle size and has high corrosion resistance. Ceramics have excellent mechanical strength and durability, and are highly reliable and have high corrosion resistance.Therefore, there is little deterioration during chemical cleaning with acids, alkalis, etc.Furthermore, the average pore diameter that determines the filtration capacity is precise. It has various advantages such as being controllable.
  • Typical examples of the ceramic filter element include a tubular filter and the monolithic filter described above.
  • the tubular filter has a cylindrical partition wall that also has a ceramic porous physical strength, and has a structure in which a single cell that penetrates the center part and is divided by the partition wall is formed.
  • monolithic filters are It has a grid-like structure in which a large number of cells divided by the partition walls are formed. Among them, a monolithic filter is suitably used because of its large filtration area per unit volume and high processing capacity.
  • a base material having a partition having ceramic porous body strength, and a plurality of cells formed by the partition so that the flow direction of the liquid is parallel, and A filter composed of a filtration membrane having a ceramic porous body force having an average pore diameter smaller than that of the base material formed on the surface of the partition wall (that is, the inner peripheral surface of the cell) can be suitably used.
  • the average pore size of the ceramic porous body constituting the filtration membrane varies depending on the required filtration performance (particle size of the substance to be removed). In the case of a filter element used for microfiltration or ultrafiltration , 0.01-: about LO / zm.
  • the average pore diameter of the ceramic porous body constituting the substrate is determined in consideration of the balance between mechanical strength and water permeability. Usually, a ceramic porous body having an average pore diameter of about 1 to several hundred m is used as a substrate.
  • the thickness of the filtration membrane 22 is reduced on one end 4b side of the cell, and on the other end 4a side of the cell.
  • the cell can be tapered as described above.
  • the thickness of the filter membrane 22 (thin side filter membrane) formed at one end 4b of the cell is preferably 100 to 250 m, and is formed at the other end 4a of the cell.
  • the thickness of the filter membrane 22 (thick filter membrane) is preferably 150 to 300 m.
  • FIG. 2 is a partial cross-sectional view schematically showing one cell of the filter element constituting the filter of the present embodiment.
  • the distance (diameter) between the partition walls 21 of the substrate is the same from one end of the substrate to the other end.
  • an intermediate layer (not shown) is formed between the base material and the filtration membrane, and the thickness of the intermediate layer is gradually changed toward one end side force toward the other end side.
  • the shape may be a taper.
  • the tapered shape means a shape in which the cell diameter (diameter) continuously decreases from one end to the other end, but at a constant rate.
  • the diameter may change, or it may have a shape in which the rate of change partially changes and a step occurs in the middle.
  • the base material can be obtained by a method of forming a clay containing aggregate particles, drying and firing, and the filtration membrane is formed by forming a slurry containing aggregate particles on the partition wall surface of the base material. Then, it can be formed by a method such as drying and firing.
  • the film can be formed by a conventionally known film formation method such as a dip film formation method, but by a filtration film formation method (see Japanese Patent Publication No. 63-66566) that can effectively prevent film defects such as pinholes. I prefer to do it.
  • a filtration film-forming method can be employed in the above-described method for producing a substrate.
  • the filtration film-forming method after the inside of the pores of the base material (porous body) is replaced with liquid, the surface of the base material on which the filtration membrane should be formed and the surface on which the filtration membrane is not formed are hermetically isolated.
  • a film-forming slurry containing aggregate particles such as ceramic Takashima is continuously fed to and brought into contact with the surface on which the filtration membrane is to be formed.
  • This is a method of forming a ceramic film on the surface of a substrate by applying a differential pressure between the surface side where the filtration film is not formed.
  • the slurry is introduced from the end of the slurry inflow side, and then the inside of the cell is flown, and the end force of the slurry outflow side is discharged.
  • the ceramic contained in the slurry is formed on the inner wall surface (partition wall surface) of the cell by sucking the slurry from the inside of the cell toward the partition wall.
  • the filtration membrane is formed thicker as it is closer to the slurry inflow end, and the filtration membrane is formed thinner as it is closer to the slurry outflow end.
  • the filter element obtained in this way can be formed in a casing so that the formed filtration membrane is thin and the end of the cell on the side is one end of the cell and faces downward in the vertical direction.
  • the average pore size of the base membrane or the filtration membrane is controlled by the average particle size of the aggregate particles constituting them. That is, if aggregate particles having a large average particle diameter are used, a base material or a filtration membrane having a large average pore diameter can be formed, and if aggregate particles having a small average particle diameter are used, the average pore diameter is increased. A small substrate or a filtration membrane can be formed.
  • At least one layer of an intermediate film having a mean porous pore size between them is formed between the base material and the filtration membrane.
  • a slurry containing aggregate particles with a small average particle diameter is formed on the partition wall surface of a base material with a large average pore diameter to form a filtration membrane, the aggregate particles in the slurry are placed inside the pores of the base material. May penetrate the pores and block the pores, resulting in a decrease in water permeability.
  • aggregate particles in the slurry for forming a filtration membrane can be trapped on the surface of the intermediate membrane, so that it is possible to prevent the aggregate particles from entering the pores of the base material.
  • a monolithic filter composed of the base material and the filtration membrane as described above, at least the end face of the monolith (portion other than the cell opening) 1S film made of a water-impermeable material such as glass Those coated with the above can be suitably used (see, for example, JP-A-61-8106 and JP-A-2001-300273).
  • a filtration membrane is not formed on the end face of the monolith, and a base material having a large average pore diameter is exposed. Therefore, the stock solution that has also penetrated the inside of the base material has already permeated the filtration membrane. Then, it may be mixed into the filtrate circulating in the base material.
  • the above structure is preferable in that it can avoid a situation in which the stock solution is mixed into the filtrate and can prevent the filtrate from being contaminated.
  • the monolithic filter for example, a number of cells 32 are formed as in the monolithic filter 31 shown in FIG.
  • a water collecting slit 34 is formed to communicate the cell of the cell and the external space of the monolith 33, and both ends of the cell (water collecting cell) communicating with the water collecting slit 34 are plugged by the plugging member 35.
  • a thing can be used suitably.
  • the flow resistance when the filtrate flows out of the monolith is larger in the cells near the center, so the flow resistance when the filtrate flows out of the monolith is small. Only the cells in the vicinity of the outer periphery are used for filtration, and it is possible that the substantial filtration area and thus the water permeability will decrease. With the above structure, the filtrate from which the cell force in the vicinity of the central portion has also flowed out can be quickly discharged into the external space of the monolith via the water collecting slit. Therefore, the cell in the vicinity of the center can be effectively used, and the substantial filtration area and thus the water permeability can be greatly increased.
  • Such a structure has a large distance to the outer periphery of the cell force monolith near the center and a large monolithic filter (for example,
  • the water collection cell has a structure that plugs the opening at both ends of the cell, the stock solution is not mixed from the cell opening.
  • the water collecting slit can be formed by breaking a group of cells arranged in parallel so as to communicate with the external space of the monolith.
  • the rupture of the cell may be performed at the stage of the formed body before firing or the dried body, or may be performed at the stage of the sintered body after firing.
  • the cell opening is plugged by, for example, a method of drying and baking after filling the cell opening to be plugged with clay (plugging material) having the same material force as that of the monolith. be able to.
  • the water collecting slits 34 are often formed in the vicinity of both end faces of the monolith 33.
  • the water collecting slits 34 are generally formed so as to be parallel to each other.
  • the shape of the tubular filter or monolithic filter is not particularly limited as long as the filtration function is not hindered.
  • Examples of the overall shape include a columnar shape as shown in FIG. 4, a quadrangular prism shape, a triangular prism shape, and the like.
  • a columnar shape that is easy to be extruded and easy to seal with the casing with less firing deformation is preferably used.
  • Examples of the cell shape include shapes such as a square cell, a hexagonal cell, and a triangular cell in addition to a circular cell as shown in FIG. .
  • a circular cell that can be easily removed by separating and removing suspended substances deposited on the partition wall surface during backwashing is preferably used.
  • the cell diameter is preferably 0.5 to 10 mm. If it is less than 5 mm, the filtration resistance increases and the filtration efficiency decreases. Sometimes. If it is larger than 10 mm, the filtration area may be reduced and the filtration efficiency may be lowered.
  • a circular cell having a cell diameter of about 1 to 5 ⁇ is preferable.
  • casing t means a container that can contain a filter element. That is, an internal space is formed in the casing, and the filter element can be built in the internal space.
  • the filter elements as described above columnar ones are generally used, and therefore the casing is often configured in a cylindrical shape that can incorporate these columnar bodies.
  • a cylindrical casing is preferably used.
  • a filter 1 is configured with a filter element 3 built in a casing 2 so that a liquid flows in a vertical direction.
  • the monolithic filter is built in a vertical arrangement so that the cell opens in the vertical direction G.
  • the stock solution is supplied from the lower end side (one end 4 b side of the cell) of the filter element 3 and toward the upper end side (the other end 4a side of the cell). Filtration is carried out during distribution (so-called upward flow filtration). After the stock solution is filtered, foreign substances (suspended substances, etc.) deposited on the partition walls in the cell 4 by backwashing are discharged to the one end 4a side of the cell.
  • the casing 2 has a stock solution supply port 5 through which the stock solution can be supplied to the filter element 3 so as to communicate with the internal space thereof, a filtrate delivery port 6 through which the filtrate can be sent out from the filter element 3, and the filter element.
  • a stock solution outlet 7 through which stock solution can be discharged from 3.
  • these openings are provided with flanges so that they can be easily connected to piping.
  • the stock solution supply port is an opening for supplying the stock solution to the filter element, and is also used when discharging the backwash drainage.
  • the stock solution supply port 5 is often formed on the lower end side of the casing 2 as shown in FIG. [0046]
  • the filtrate outlet is an opening for sending filtrate from the filter element, and is also used when supplying clear water for backwashing. From the viewpoint of facilitating air bleeding in the casing, it is preferable to form the filtrate outlet 6 on the upper end side of the casing 2 as shown in FIG.
  • the stock solution outlet is an opening for discharging the stock solution from the filter element, and is also used when supplying compressed air for backwashing.
  • Examples of the stock solution discharged from the filter element include drainage drainage during water filling operation and circulating stock solution during cross-flow operation (a method of continuous filtration while circulating the stock solution through the filter element). It is done.
  • the stock solution discharge port 7 is generally formed on the upper end side of the casing 2 as shown in FIG. Is.
  • the casing may be composed of several members that need not be integrally formed.
  • a hollow cylindrical casing main body 11 a top cap 12 attached to the upper end thereof, and a bottom cap 13 attached to the lower end thereof are also configured.
  • a filtrate delivery port 6 is formed near the upper end of the casing body 11
  • a stock solution discharge port 7 is formed at the top of the upper cap 12
  • a stock solution supply port 5 is formed at the lower end of the bottom cap 13.
  • sealing members such as rubber-like O-rings 14, 15 and ring-shaped flat packings are interposed between the members to be connected to ensure liquid-tightness. It is preferable to connect each member in the state which was carried out.
  • a sealing material is arranged along the flanges of both members to be connected, bolt holes are respectively provided on the outer peripheral side from the sealing material arrangement part of the flange, and fixed with bolts and nuts.
  • a concave groove for arranging and fixing the sealing material may be provided on the flange for facilitating the arrangement of the sealing material and surely fixing.
  • the casing is impermeable and highly resistant to corrosion, and is preferably made of a material.
  • a ceramic filter element In the case of a ceramic filter element, a stainless steel casing or the like is preferably used.
  • the filter element When forming the filter according to the present embodiment, the filter element is built in the casing in a state in which the raw liquid flow path and the filtrate flow path are liquid-tightly separated by a sealing material. is required.
  • the structure is not particularly limited, but normally, a sealing material is arranged along the outer edge of both end faces of the filter element so as not to block the cell opening, and the sealing material is brought into contact with a part of the casing. Structure is adopted. Then, when filtering the liquid to be treated (stock solution), the filter element is placed in the casing so that the stock solution flows into the cell from the large end of the cell! To be built in.
  • the shape, structure, material, and the like of the sealing material are not particularly limited, and may be, for example, an O-ring or a ring-shaped flat packing that has a strength of inertia such as rubber.
  • seal caps 16 and 17 are used as the sealing material as shown in FIG.
  • the term “seal cap” means a cap-shaped seal material that is used by being attached to the end of a columnar body such as a filter element (for example, JP-A-10-184919). reference). Compared to O-rings and ring-shaped flat packings, such cap-shaped sealing materials can be easily and reliably fixed to the filter element, and can ensure high liquid tightness. I like it.
  • FIG. 5 (a) and FIG. 5 (b) are explanatory views schematically showing an embodiment of a seal cap.
  • FIG. 5 (a) is a top view and FIG. 5 (b) is a diagram.
  • FIG. 5 is a cross-sectional view taken along line AA ′ of (a).
  • the seal cap 16 shown in FIGS. 5 (a) and 5 (b) is an annular member having an L-shaped cross section, which is also made of an elastic material such as rubber, and a body portion 16b extending in the vertical direction. And a top portion 16a extending in the horizontal direction, and has a central opening portion 16c.
  • FIG. 6 (a) and FIG. 6 (b) are explanatory views schematically showing the usage state of the seal cap.
  • FIG. 6 (a) is a top view
  • FIG. 6 (b) is FIG. FIG.
  • the seal cap 16 has the body portion 16b on the outer peripheral surface 31a of the monolithic filter 31,
  • the top portion 16a is attached to the end portion of the monolithic filter 31 so that the top portion 16a is in close contact with the end face of the monolithic filter 31.
  • the central opening 16c is formed so that all the many cells 32 of the monolithic filter 31 are exposed, and is configured so that all the cells 32 can be used effectively! RU
  • the filter 1 of the present embodiment shown in FIG. 1 is preferably used as a dead-end type filter by closing the stock solution outlet 7 at the top of the upper cap 12 with a valve or the like.
  • the undiluted solution outlet 7 and undiluted solution supply port 5 are connected by a pipe or the like so that the undiluted solution circulates in the filter 1 so that it can be used as a cross-flow type filter.
  • the stock solution supply port of each filter is connected to the stock solution supply header pipe for supplying the stock solution to each filter through a flange, and the filtrate delivery port collects the filtrate together.
  • the filtrate recovery header pipe is preferably connected via a flange, and the stock solution discharge port is preferably connected via a flange to the stock solution recovery header pipe for collecting and collecting the stock solution after filtration.
  • the filter of the present invention can be used in a wide range of fields such as drinking water 'industrial water production, pharmaceutical' food, or sewage, industrial wastewater, etc. Used to remove harmful substances.

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

Abstract

La présente invention concerne un filtre (1) comprenant un élément filtre (3) doté d’une paroi de séparation de corps poreux destinée à former une cellule (4) devenant une voie de fluide, et un boîtier (2) capable d’incorporer l’élément filtre (3), celui-ci (3) étant incorporé dans le boîtier (2) de manière à faire passer un fluide dans la direction verticale G. L’élément filtre (3) est incorporé dans le boîtier (2) de manière à obtenir une cellule (4) dont le diamètre rétrécit en prenant une forme évasée d’une extrémité (4b) à l’autre (4a), le liquide original s’écoulant dans la cellule (4) à partir d’une extrémité (4b) de la cellule, et les corps étrangers qui se sont déposés sur la paroi de séparation à l’intérieur de la cellule (4) peuvent être évacués vers une extrémité (4b) de la cellule pendant un lavage à contre-courant. L’invention se rapporte également à un filtre (1), destiné à nettoyer l’eau, permettant d’empêcher que la cellule ne se bouche avec des substances en suspension détachées lorsque les substances en suspension qui se sont déposées sur la paroi de séparation durant le filtrage sont détachées lors d’un lavage à contre-courant.
PCT/JP2005/012110 2005-06-30 2005-06-30 Filtre WO2007004261A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3808708A4 (fr) * 2018-06-12 2021-08-11 Hitachi Metals, Ltd. Unité de filtres céramique pour traitement de l'eau

Citations (5)

* Cited by examiner, † Cited by third party
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JPH011511A (ja) * 1987-06-24 1989-01-05 出光石油化学株式会社 高密度情報記録用ディスクの射出成形金型
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