WO2016035688A1 - プリーツフィルター、プリーツフィルターカートリッジ、それを用いたバラスト水処理装置およびバラスト水の処理方法 - Google Patents
プリーツフィルター、プリーツフィルターカートリッジ、それを用いたバラスト水処理装置およびバラスト水の処理方法 Download PDFInfo
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- WO2016035688A1 WO2016035688A1 PCT/JP2015/074347 JP2015074347W WO2016035688A1 WO 2016035688 A1 WO2016035688 A1 WO 2016035688A1 JP 2015074347 W JP2015074347 W JP 2015074347W WO 2016035688 A1 WO2016035688 A1 WO 2016035688A1
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- filter
- pleated filter
- base material
- ballast water
- pleated
- Prior art date
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
- B63J4/002—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating ballast water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/12—Pleated filters
- B01D2201/127—Pleated filters with means for keeping the spacing between the pleats
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- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/008—Mobile apparatus and plants, e.g. mounted on a vehicle
Definitions
- the present invention relates to a structure of a pleated filter mainly used for liquid filtration, and more particularly to a pleated filter used in a system for treating ballast water stored in a ship and used for filtering a large amount of water. Related to the device.
- Patent Document 1 discloses an example in which a pleated filter formed in a cylindrical shape is used as a filter device for removing sludge from a cutting fluid of a machine tool. In this apparatus, it is said that a filter apparatus having a high filter cleaning effect can be provided by ejecting liquid toward the outer surface of the filter while rotating the cylindrical filter.
- ballast water is seawater that is loaded on a ship for safe navigation even in an empty state, and various methods for purifying ballast water to remove or kill or inactivate microorganisms have been studied.
- a method of using filtration for the purpose of removing relatively large microorganisms has also been studied.
- Patent Document 2 discloses a ballast water treatment apparatus using a filtration membrane by the applicant of the present application.
- JP 2008-93783 A Japanese Patent No. 4835785
- brackish water and seawater such as seawater desalination and ballast water, or water treatment such as sewage, domestic wastewater, and industrial wastewater
- pre-filtration treatment is required to remove foreign substances, dust, and microorganisms in the water.
- the inventors of the present application are considering the application of a pleated filter to such filtration.
- large-scale, high-flow operation is a technical problem that generally tends to cause a reduction in throughput and filtration function due to early clogging. Yes.
- the device disclosed in Patent Document 2 is a filtration device that incorporates a cylindrical filter in a cylindrical container and collects the liquid flowing into the inside from the outside of the cylindrical filter as a filtrate.
- the filtration target liquid is sprayed from a nozzle provided on the side surface of the cylindrical container to a part of the filter filtration surface to clean the filtrate deposited on the filter surface to restore the permeation flux and to filter the washed filtrate.
- a stable filtration state is continuously continued. What is important for such a system to stably maintain continuous filtration is the cleaning effect due to the ejection of the liquid to be filtered onto the filter filtration surface.
- the cylindrical filter In order to efficiently and effectively clean the entire filter by changing the cleaning part of the filter over time, the cylindrical filter is rotated by a motor drive etc. during filtration to be filtered from the ejection nozzle The place where the jet of liquid hits is changed continuously and periodically. In order to reliably perform this rotary cleaning and to keep a high filtration flow rate stable, it is necessary to maintain the ejection of the liquid to be filtered from the nozzle at a flow rate level higher than a certain level. In the inventors' investigation, as a result of receiving such a high flow rate of the liquid to be filtered, the cylindrical filter deteriorates with time and breaks, and a part of the liquid to be filtered passes through the filter without passing through the filter.
- the present invention provides a pleated filter that can be used stably for a long period of time, preventing deterioration and breakage due to use, and a ballast water treatment device and a treatment method as a filtration device using the pleat filter. Objective.
- one aspect of the present application is a pleat filter in which a filter base material having a fold so as to repeat a peak portion and a valley portion is a cylindrical shape having the ridge line direction of the fold as an axial direction, and the pleat filter is It is a pleated filter provided with an adhesion reinforcing portion along a ridge line direction of a crease in a trough that is convex toward the inside of the cylindrical shape.
- Another aspect of the present invention is a ballast water treatment apparatus using the pleated filter as a filtration membrane, wherein the pleated filter seals the upper surface of the cylinder and the bottom surface of the cylinder in a watertight manner, and rotates about the cylindrical axis.
- a to-be-treated water nozzle that is held so as to flow out the to-be-treated water toward the outer peripheral surface of the pleated filter, and an outer cylinder that is provided so as to surround the pleated filter and includes a nozzle port of the to-be-treated water nozzle inside A case having a portion, and a filtrate flow path for leading filtrate water that has passed through the pleat filter from the inside of the cylinder of the pleat filter to the outside of the case,
- a ballast water treatment apparatus including a discharge flow path for discharging discharged water that has not been filtered by the pleated filter to the outside of the case;
- the ballast water treatment device is mounted in the hull, seawater obtained from the outside of the hull is used as water to be treated, and the filtered water treated by the ballast water treatment device is further killed. Is added to the ballast water and stored in the hull as ballast water.
- FIG. 2 is an enlarged schematic diagram showing a configuration example of a part of the pleated filter of FIG. 1 and a part of a valley part (V part) bonded thereto. It is a figure which shows a part of pleat filter, and is an enlarged schematic diagram which shows an example of a structure which provides a reinforcement member in a part of trough part (V part). It is a figure which shows a part of pleat filter, and is an enlarged schematic diagram which shows an example of a structure which provides a reinforcement member in a part of trough part (V part).
- FIG. 10 is an enlarged schematic diagram for explaining an example of resin impregnating / reinforcing the filter base material at the peak in the configuration example of FIG. 9.
- FIG. 12 is a diagram schematically showing a configuration of a horizontal AA cross section in FIG. 11. It is a block diagram explaining the example of whole structure of the ballast water treatment system using the ballast water treatment apparatus which is the embodiment of this invention.
- One aspect of the present application is a pleated filter in which a filter base material having a fold so as to repeat a peak portion and a valley portion has a cylindrical shape with the ridge line direction of the fold as an axial direction, and the pleated filter has a cylindrical shape. It is a pleated filter provided with an adhesion reinforcing portion along the ridge line direction of the crease at the valley portion that is convex inward.
- An adhesion reinforcement part is a reinforcement structure for preventing breakage of a fold by adhere
- Such a structure is particularly effective when used in a filtration device configured to filter the water to be treated from the outside to the inside of the cylindrical pleated filter and the flow rate and pressure of the water to be treated fluctuate locally. It is. The movement in the direction of opening and closing the fold of the pleated filter is repeated by the flow rate (pressure) variation of the water to be treated. As a result, the crease is bent sharply, and the crease is easily damaged.
- the adhesion reinforcing portion may include a reinforcing member that is separate from the filter base material, and the reinforcing member and the filter base material may be bonded along the ridge line direction.
- the fold line By configuring the fold line in which the reinforcing member and the filter base material are integrated, the fold line has high rigidity with respect to bending, and is difficult to be deformed and torn.
- the material of the reinforcing member is not limited as long as such an effect is obtained.
- the reinforcing member has rigidity with respect to bending, is not easily broken, and has a restoring force (elastic force).
- a reinforcement member is corrosion resistance with respect to to-be-processed water.
- the adhesion reinforcing part is a part where the filter bases are bonded together or a part where the filter base and the reinforcing member are integrated, and is a part of the pleated filter along the ridge line of the fold.
- the integration of the filter base material and the reinforcing member can be most commonly configured by bonding the filter base material and the reinforcing member, and the bonding is performed by a known bonding method according to the bonding target, such as bonding with an adhesive.
- the adhesion reinforcing portion may include a reinforcing member that is separate from the filter base material, and the filter base material may be bonded along the ridgeline direction so as to wrap the reinforcing member.
- the adhesive reinforcing portion wraps a reinforcing member that is a separate body, so that the appearance after completion is free from protrusions and is easy to handle.
- the said adhesive reinforcement part may integrate the filter base material itself which comprises a crease
- This configuration has effects such as ease of manufacturing and cost reduction.
- This adhesion reinforcing portion can be integrated without using an adhesive by heat fusion.
- This adhesion reinforcing portion can suppress variations in the shape and strength of the adhesion portion due to the presence of an adhesive, and is preferable in terms of ease of manufacture and reduction in material costs.
- the above-mentioned adhesion may be adhesion by ultrasonic bonding.
- Ultrasonic bonding is a method of promoting heat generation by applying ultrasonic waves to an object to be bonded and integrating them by the effect of ultrasonic vibration.
- a commercially available device can be used as the ultrasonic bonding device, and a reliable construction of the bonded portion can be achieved at low cost.
- the filter substrate is a polyethylene terephthalate nonwoven fabric
- the reinforcing member is a plate-like body of any resin selected from the group consisting of polypropylene, polyethylene, polyamide, polyester, and vinyl chloride. These materials are suitable for adhesion by ultrasonic bonding in addition to the characteristic for reinforcement.
- a resin member having a strength necessary for ease of handling in manufacturing, weight reduction, cost, and the like is preferably used as the reinforcing member.
- Particularly preferred is polypropylene because it has moderate strength and restoring force.
- Some non-metallic materials, such as metal and glass / ceramics, have a performance superior to resin in terms of strength.
- a restoring force against deformation is also required. Therefore, if it is a metal, a spring material, quenching process, etc. are needed, but the above-mentioned resin material is suitable considering the processing to a net structure and the corrosivity by seawater comprehensively.
- FIG. 1 Another embodiment of the present application is a pleated filter cartridge having any of the pleated filters described above and lid members respectively provided on the upper and lower bases of the pleated filter.
- a cylindrical pleated filter for filtration, it is necessary to seal the upper and lower bottom portions so that there is no liquid leakage inside and outside the cylindrical shape.
- Such a sealing structure can also be provided in the filtration device.
- a ridge reinforcing member fixed up and down with a lid member is provided on the back side of the ridge viewed from the outside of the cylindrical shape of the pleated filter cartridge.
- a peak reinforcing member whose top and bottom are fixed on the lid member is effective.
- a preferable material of the peak reinforcing member is the same as that of the reinforcing member used for the valley.
- a peak part reinforcement member is not limited to this, It can replace with another member and a reinforcement means, or can also be used together.
- the crease of the mountain part further has a resin impregnated reinforcement along the ridge line direction.
- a synergistic reinforcing effect can be expected by reinforcing the folds of the filter base material by resin impregnation.
- the ballast water treatment device of the present application is a ballast water treatment device using the above-described cylindrical pleated filter as a filtration membrane, and the pleat filter seals the upper surface and the bottom surface of the cylinder in a watertight manner, and A treated water nozzle that is rotatably held around a cylindrical shaft and flows out the treated water toward the outer peripheral surface of the pleated filter, and a nozzle port of the treated water nozzle that is provided so as to surround the pleated filter.
- a case having an outer cylindrical portion provided inside, a filtered water passage for leading filtered water that has passed through the pleated filter from the inside of the cylinder of the pleated filter to the outside of the case, and discharged water that has not been filtered by the pleated filter Is a ballast water treatment device provided with a discharge flow path for discharging the water to the outside of the case.
- the apparatus having such a structure since the water to be treated is ejected from the nozzle port outside the cylinder of the cylindrical pleated filter toward the outer surface of the pleat filter, the pressure of the water to be treated is concentrated on a part of the pleat. Then, pressure is applied in the direction in which the pleats are opened, and the possibility that the filter is damaged at each of the valley portion and the mountain portion as described above increases. Therefore, by adopting the above-described structure for preventing breakage due to the bonded portion, it is possible to expect effects such as suppression of occurrence of filtration failure, long-term operation of the apparatus due to the long life of the pleated filter, and reduction of operation costs.
- the pleated filter can also be used as a pleated filter cartridge in which a pleated filter and a lid member are integrated in advance.
- the ballast water treatment method of the present application includes the above-described ballast water treatment device mounted in the hull, seawater obtained from the outside of the hull is used as treated water, and the ballast water is treated. It is preferable to use a method for treating ballast water that is stored in the hull as ballast water after further killing the filtered water treated by the water treatment device.
- FIG. 1 A typical configuration example of a target pleated filter is schematically shown in FIG. 1 as a perspective view.
- the pleated filter 10 in FIG. 1 is formed by forming a pleat shape by repeatedly folding plate-like filter base materials 11 alternately in peaks and troughs, and connecting the both end portions into a cylindrical shape as a whole.
- the pleated filter 10 closes the upper and lower surfaces of the cylinder with different members and fixes the shape. Filtration is performed from the inside to the outside of the cylindrical filter or vice versa.
- a V portion of the figure that is a fold protruding to the inside of the cylinder is referred to as a trough
- a M portion of the drawing that is a fold protruding to the outside of the cylinder is referred to as a peak.
- the outer side of a trough part refers to the surface seen from the cylinder inner side in the trough part.
- the inner side of the valley refers to the surface of the valley as viewed from the outside of the cylinder.
- FIG. 1 schematically shows a pleated shape, and an actual fold is not an ideal acute angle as shown in the figure, and is often a rounded fold.
- a porous resin sheet is used for the filter substrate.
- a porous structure such as a stretched porous body, a phase-separated porous body, or a nonwoven fabric made of polyester, nylon, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), etc. is used.
- a nonwoven fabric made of polyester such as polyethylene terephthalate is particularly preferably used.
- the term “reinforcement” refers to a means for suppressing damage mainly occurring in a part of a fold, and means therefor.
- the breakage of the crease refers to a defective portion that deteriorates the filtration performance, such as a tear or a through hole generated in a part of the crease due to repeated behavior applied to the crease.
- FIG. 2 shows an example of trough reinforcement means.
- FIG. 2 is a schematic view showing only a part of the fold of the cylindrical pleated filter illustrated in FIG. 1 in a cross section perpendicular to the cylindrical axis.
- M is a peak and V is a valley.
- the filter base material 11 constituting the fold line is bonded at the bonding portion B. That is, the filter base material 11 is bonded along the cylindrical axis direction at a location indicated by B.
- the width of the bonding portion B (bonding width in the cylindrical radial direction) is arbitrary, and it is sufficient that the filter base materials are bonded to each other.
- FIG. 3 is a diagram illustrating another example of the reinforcing means for the valleys.
- FIG. 3 is a schematic diagram in which only a part of the fold of the cylindrical pleated filter is expressed by a cross section perpendicular to the cylindrical axis, as in FIG.
- M is a peak
- V is a valley.
- the filter base material 11 constituting the fold line is bonded at the bonding portion B. That is, the filter base material 11 is bonded along the cylindrical axis direction at a location indicated by B.
- the reinforcing member 21 is provided so that the filter base material 11 wraps between the crease and the bonding portion B.
- the reinforcing member 21 is a member that extends in the cylindrical axis direction along the filter fold.
- the reinforcing member 21 is preferably fixed at its upper and lower ends by a pleated filter lid member.
- the width of the bonding portion B (adhesion width in the cylindrical radial direction) is arbitrary, and the bonding portion B is bonded with sufficient strength so that the filter base materials are not peeled off in use so as to wrap the reinforcing member 21. It ’s fine.
- the reinforcing member 21 is a plate-like member having a rectangular cross section in FIG. 3, but is not limited thereto.
- a columnar body such as a quadrangular column or a cylinder may be used.
- a member having a corner such as a plate shape or a prism shape, it is preferable to round the corner. This is to prevent breakage due to abrasion between the corner and the filter base material.
- FIG. 4 is a diagram showing another example of the means for reinforcing the valleys.
- FIG. 4 is a schematic view in which only a part of the fold of the cylindrical pleated filter is expressed by a cross section perpendicular to the cylindrical axis, as in FIG.
- M is a peak
- V is a valley.
- the filter base material 11 constituting the fold line and the reinforcing member 22 are bonded to each other at the bonding portion B. That is, the reinforcing member 22 is provided along the cylindrical inner surface of the filter base material 11, and the filter base material 11 and the reinforcing member 22 are bonded along the cylindrical axis direction at a place indicated by B.
- the reinforcing member 22 is a member extending in the cylindrical axis direction along the filter fold.
- the reinforcing member 22 is preferably fixed at the upper and lower ends thereof by a pleated filter lid member.
- the position of the bonding portion B is preferably close to the crease tip, but is not particularly limited as long as the effect of reinforcement is obtained.
- the width of the bonding portion B (bonding width in the cylindrical radial direction) is arbitrary, and the bonding portion B only needs to be bonded with sufficient strength such that the reinforcing member 22 and the filter base material 11 are not peeled off in use.
- the reinforcing member 22 may be a plate-like member.
- a plate having a plate shape as a whole and having a large number of holes penetrating the plate-like front and back, or having a net-like structure can be used as the reinforcing member 22.
- Such a member has an effect of distributing the filtrate and reducing the overall weight.
- FIG. 5 is a diagram showing another example of the means for reinforcing the valley.
- FIG. 5 is similar in structure to FIG. 4, and the difference from FIG. 4 is that two reinforcing members are provided for one valley fold.
- the filter base material 11 constituting the fold, the reinforcing member 22, and the reinforcing member 23 are bonded to each other at the bonding portion B.
- the reinforcing effect can be enhanced.
- FIG. 6 is a diagram showing still another example of the means for reinforcing the valley. 6 has the same structure as that of FIG. 3, but the reinforcing member 24 is a plate-like body, and the position of the bonding portion B is different from that of FIG.
- a plate-like reinforcing member 24 is disposed inside the fold line of the filter base material 11 constituting the fold.
- the reinforcing member 24 is bonded to the filter base 11 and the bonding portion B on each of the plate-like front and back surfaces. That is, the filter base material 11 and the reinforcing member 24 are bonded along the cylindrical axis direction at a location indicated by B.
- the reinforcing member 24 is a member extending in the cylindrical axis direction along the filter fold.
- the reinforcing member 24 is preferably fixed at the upper and lower ends thereof by a pleated filter lid member.
- the width of the bonding portion B (bonding width in the cylindrical radial direction) is arbitrary, and the bonding portion B only needs to be bonded with sufficient strength that the filter substrate 11 and the reinforcing member 24 are not peeled off in use.
- the reinforcing member 24 may be a plate-like member. It is possible to use a plate that is entirely plate-shaped and has a large number of holes penetrating the plate-shaped front and back, or a network structure. Such a member has an effect of distributing the filtrate and reducing the overall weight.
- FIG. 7 is a schematic perspective view for representing the entire pleated filter including an adhesive reinforcing portion along the ridge line direction of the fold line, and shows the reinforcing structure of FIG. 6 as an example as one embodiment.
- the reinforcing member 24 is provided in each of the pleat valleys V, and the reinforcing member 24 and the filter base material 11 are bonded.
- the configuration of the adhesion reinforcing portion is not limited to this figure, and may be another configuration example described in the present application, a configuration as a technical idea included in the scope of the present disclosure, or a configuration equivalent thereto.
- FIG. 8 is a perspective view showing a pleated filter cartridge in which a lid member 12 and a lid member 13 provided on the upper and lower bases of the pleat filter are provided and integrated.
- the filter base material and the reinforcing member of the pleated filter 10 are fixed by the lid member 12 and the lid member 13. Fixing can be performed with a known adhesive or sealant.
- the lid member is provided with a shaft for rotating the pleated filter, a through hole for discharging the filtrate, and the like as necessary.
- a cartridge By using a cartridge, it is easy to form a reliable watertightness of the pleated filter.
- the use of a cartridge facilitates handling such as transportation and replacement of the pleated filter.
- FIG. 9 is a configuration example in which a peak reinforcing member 25 is provided inside the fold of the peak M of the pleat filter.
- the peak reinforcing member 25 is a plate-like member, and the top and bottom thereof are fixed by a lid member (not shown).
- the peak reinforcing member 25 is provided mainly for the purpose of preventing the filter from being bent in the circumferential direction.
- the peak reinforcing member 25 is curved with a gentle curve while preventing the pleat crease from being bent at an obtuse angle (" ⁇ ") in the circumferential direction, and returns to its original shape when released from pressure. It preferably has a restoring force.
- An example of a member that is preferably used as the peak reinforcing member 25 is a resin mesh plate. Even if the peak reinforcing member 25 is a simple plate material, the reinforcing effect can be obtained. However, it is preferable to provide a large number of holes penetrating from one side of the plate-like body to the other side. This is because the peak reinforcing member 25 having this structure is difficult to prevent the flow of the filtrate.
- the peak reinforcing member 25 can be a punched material having a large number of holes formed in the plate material, a plate material having a three-dimensional mesh-shaped communication hole, or the like in addition to the mesh-shaped plate material.
- the material of the peak portion reinforcing member 25 is the same as that of the reinforcing member used for the valley portion V. Particularly preferred is a polypropylene porous plate in that it has moderate strength and restoring force.
- the length of the peak reinforcing member 25 is preferably set to a length that does not overlap with the reinforcing member 22 provided on the valley side when the pleats of the pleat filter are folded tightly.
- the shape of the reinforcing member 22 on the valley side is different from that illustrated in FIG. 9. Since the reinforcing members do not overlap each other, the pleats of the pleated filter can be more densely configured, and the filtration area can be increased.
- FIG. 10 is a diagram for explaining a further mode of reinforcing the mountain portion.
- FIG. 10 is an enlarged schematic view for explaining an example in which the filter base material 11 is reinforced with resin impregnation at the crease of the mountain portion M in the configuration example of FIG. By impregnating the resin 14 along the folds of the filter base 11, further reinforcement against breakage is achieved. Note that FIG. 10 shows the reception impregnation reinforcement in which the resin 14 is impregnated from the outer surface of the fold fold of the filter base material 11 to the inside of the filter base material 11, but this is only an example.
- Resin-impregnated reinforcement in which the resin 14 has completely penetrated from the outer surface of the fold line of the filter base 11 to the opposite side (reinforcement plate side) of the filter base 11 is also effective. Further, resin impregnated reinforcement in which the resin 14 impregnated from the filter substrate 11 to the opposite side (reinforcement plate side) adheres with a thickness so as to cover the surface of the filter substrate 11 is also effective.
- thermosetting resins such as silicone, epoxy, and polyurethane
- thermoplastic resins such as polyester, nylon, polyethylene, polypropylene, ETFE, and PVdF, or those obtained by diluting PVdF and silicone with a solvent can be used.
- the resin 14 to be impregnated needs fluidity to penetrate into the porous body when impregnated, but after impregnation, the resin 14 needs to be integrated with the filter so that it cannot be easily separated.
- thermosetting resins it may be cured by heat after impregnation, and for two-part curable resins, it should be cured after impregnation immediately after mixing. In the case of a resin whose viscosity has been reduced by dilution with a solvent, the solvent is dried after impregnation. In order to do so, it is better to cure for a while.
- FIG. 11 and 12 are diagrams showing an example of a ballast water treatment apparatus for ships as an embodiment of the present invention.
- FIG. 11 is a diagram schematically showing a configuration of a vertical section including an axis
- FIG. 12 is a diagram schematically showing a configuration of a horizontal AA section in FIG.
- the cylindrical pleated filter 101 is disposed so as to surround an axis serving as a rotation center, and is attached so as to be rotatable around a central pipe 140 (pipe does not rotate) disposed at the center.
- the upper and lower surfaces of the pleated filter 101 are closed watertight.
- the pleated filter 101 may be used as a pleated filter cartridge in which the upper and lower surfaces are closed with a lid member.
- the rotatable mounting structure also needs to be a watertight structure, but a known structure is used without any particular limitation.
- a case 103 is provided so as to cover the entire filter.
- the case 103 includes an outer cylinder part 131, a lid part 132, and a bottom part 133, and the bottom part 133 is provided with a discharge channel 108.
- a treated water channel 106 and a treated water nozzle 102 are provided for introducing seawater as treated water into the case 103.
- the treated water nozzle 102 is extended from the treated water flow path 106 so that the nozzle port 121 is provided in the outer cylinder portion 131 of the case 103, so that the treated water flows out toward the outer peripheral surface of the pleated filter 101. It is configured. Further, a motor 190 is provided on the central axis of the pleat filter 101 for rotating the pleat filter 101. The motor 190 is driven by electric power from a drive control unit (not shown).
- the water to be treated ejected from the water nozzle 102 to be treated hits the outer peripheral surface of the pleated filter, and the cleaning effect of the pleated filter is obtained by the pressure.
- the water to be treated that is not filtered and the suspended matter that has settled in the case 103 are sequentially discharged from the discharge flow path 108 at the bottom 133 of the case 103.
- the characteristic of this apparatus is that the turbid component and the remaining treated water are continuously discharged while being continuously discharged.
- the characteristic is 50 to 100 tons / hour required for ballast water and 4000 tons in a larger system. / Effective for securing a large throughput over time.
- the pleated filter becomes large, and its prevention of breakage is particularly important.
- a valve or the like is not shown in the discharge channel 108, but equipment necessary for maintenance and flow rate adjustment can be provided.
- the filtered water filtered by the pleated filter 101 is guided to the filtered water flow path 107 through the water intake hole 141 provided in the central pipe 140 inside the filter and flows out of the case.
- the treated water nozzle 102 may have a rectangular nozzle opening 121.
- vibration in the direction in which the fold of the pleated filter 101 opens and closes is generated, so that a hole such as a crease is easily opened.
- the pleated filter is provided with a reinforcing member is illustrated, damage can be effectively suppressed, and the apparatus can be operated for a longer period of time.
- FIG. 13 is an explanatory diagram schematically showing the overall configuration of a marine ballast water treatment system using the above-described ballast water treatment device as the filtration device 42.
- water to be treated which is seawater taken from the ocean is sent by a pump 41 through a pipe 31 and supplied to a filtration device 42 which is a filtering means through a pipe 32.
- the filtered water filtered in the filtering device 42 is sent to a killing device 43 (not essential) such as an ultraviolet irradiation device or an electrolysis device via a pipe 33.
- the discharged water that has not been filtered in the filtering device 42 is led out of the device through the pipe 35.
- the seawater subjected to the killing process is sent to the tank 44 through the pipe 34 and the pipe 36.
- the resin used for the reinforcing member was selected as follows.
- the reinforcing member needs to have flexibility and rigidity that can be deformed following the deformation of the filter base material, strength against repeated deformation, and corrosion resistance. Also, additional required performance such as handling in manufacturing, weight reduction, and cost reduction is required. Furthermore, it is preferable that the reinforcing member has adhesiveness and weldability with the filter base material in order to constitute an adhesive reinforcing portion.
- Table 1 shows the results of a comparative study of performance required for materials from such a viewpoint.
- Resin materials were used as reinforcement members in consideration of corrosion resistance and weight reduction. Resin materials considered were polypropylene (PP), polyethylene (PE), vinyl chloride (vinyl chloride), polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), acrylonitrile / butadiene / styrene copolymer resin (ABS) ), Ethylene / vinyl acetate copolymer resin (EVA). High density polyethylene (HDPE) was used as the polyethylene, and soft vinyl chloride and hard vinyl chloride were compared as the vinyl chloride.
- PP polypropylene
- PE polyethylene
- PET vinyl chloride
- PET polyethylene terephthalate
- PTFE polytetrafluoroethylene
- ABS acrylonitrile / butadiene / styrene copolymer resin
- EVA Ethylene / vinyl acetate copolymer resin
- High density polyethylene (HDPE) was used as the poly
- the items compared are tensile strength, elongation at break, tensile modulus, bending strength, impact strength, weldability, and acid / alkali resistance.
- ⁇ is used for items judged to be preferable for use as a reinforcing member
- ⁇ is used for items judged to be applicable
- ⁇ is used for items judged not to be applied
- items that cannot be judged Each symbol of “-” was entered in Those judged to be preferable for all items are PP and PE, and it is considered that the use as a reinforcing member is particularly preferable.
- hard vinyl chloride and PET are applicable as comprehensive judgment.
- Filter base material Non-woven fabric made of polyethylene terephthalate (trade name: AXTER G2260-1S BK0 manufactured by Toray)
- Reinforcement member Polypropylene plate material Nominal thickness 1.0mm Urethane impregnation reinforcement at the ridge (57mm width centering on the ridge)
- Mountain reinforcement member Polypropylene mesh board (trade name: Takiron Tricarnet SN-598) Mesh pitch 4.8mm x 4.8mm Nominal thickness 1.5mm (warp 1.5mm, weft 1.2mm)
- the pleats of the cylindrical pleated filter were divided into six groups (75 pleats each) at 60 degrees, and different reinforcing means were formed in each group.
- the reinforcing means used is as follows. In each of the following reinforcements, a ridge reinforcement member and urethane impregnation reinforcement were applied as ridge reinforcement.
- the width of the peak portion reinforcing member in the cylindrical radial direction is 50 mm (however, only the reinforcing means 6 is 70 mm).
- -Reinforcing means 1 A 20 mm wide polypropylene plate as a reinforcing member is ultrasonically fused to the filter base in the configuration shown in FIG.
- 4-Reinforcing means 2 Same as the reinforcing means 1, but a 20 mm wide polypropylene plate is ultrasonically fused The place to be used is the one opposite to the left and right sides of the reinforcing means 1 (the left and right opposite side means that the cross section shown in FIG. 4 is a cross section seen from above the cylinder, and in FIG. (On the other hand, the opposite side means having a reinforcing member on the right side of the valley V.)
- -Reinforcing means 3 Ultrasonic fusion of a polypropylene plate having a width of 20 mm as the reinforcing member to the filter base material in the configuration shown in FIG.
- 6-Reinforcing means 4 A polypropylene plate having a width of 3 mm as the reinforcing member in the configuration shown in FIG. Encapsulating with filter material, ultrasonic welding of filter base material ⁇ Reinforcing means 5: Ultrasonic welding of filter base materials at a position 5 mm from the fold of valley V in the configuration shown in FIG. 2 ⁇ Reinforcing means 6: Comparison As an example, without adhesive reinforcement. However, there is only urethane impregnation reinforcement in the valley as well as the mountain.
- Bonding (thermal fusion) by ultrasonic bonding in each of the reinforcing means is performed along the cylindrical axis direction of the pleated filter.
- the bonding width in the direction perpendicular to the cylinder axis is 2 ⁇ 0.6 mm.
- the ultrasonic welding equipment used was an ultrasonic welding machine 2000Xdt manufactured by Japan Emerson Branson Division. The conditions are as follows. ⁇ Welding time: 600 msec ⁇ Hold time: 500msec ⁇ Air pressure: 500kPa ⁇ Trigger pressure: 500N ⁇ Amplitude: 100% ⁇ Horn DownSpeed: 60mm / sec
- the filtration operation was continued and the presence or absence of filter breakage was examined.
- damage was confirmed in seven valleys.
- no damage was observed in any of the troughs in the other reinforcing means 1 to 5, and the effect of each reinforcing means was confirmed.
- Particularly preferred are the reinforcing means 1 and the reinforcing means 2.
- the reinforcing means 1 and the reinforcing means 2 are different in the mounting position of the reinforcing member. Since the pleated filter performs filtration while rotating, the difference between left and right is the difference between the front and the rear in the rotation direction.
- the reinforcing means 3 has a sufficient reinforcing effect, but is slightly inferior to the reinforcing means 1 in that the valleys are likely to be clogged.
- Reinforcing means 4 and 5 are heat welds between the filter base materials, and the filtration area is slightly reduced because the part from the welded part to the crease tip cannot contribute to the filtration.
- the peak portion was reinforced by the peak portion reinforcing member and urethane impregnation in any reinforcing means.
- the peak portion was not damaged, and the reinforcing effect was confirmed. It can be seen that the reinforcement of the peak part is effective even if the valley part is reinforced or not, and that a more effective reinforcement effect can be obtained by using it together with the reinforcement of the valley part.
- the pleated filter of the present invention is superior in durability without causing performance deterioration due to breakage, it is necessary to use submerged water when using brackish water and seawater such as seawater desalination and ballast water, or when treating sewage, domestic wastewater, industrial wastewater, It can be suitably used for pre-filtration treatment for removing foreign matters, dust, and microorganisms.
- the pleated filter of the present invention is excellent in water treatment and concentration treatment of high turbidity and high SS (sustained solids), it can be applied to valuable materials recovery fields such as food fields.
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Abstract
Description
そこで、本発明は、使用による劣化や破損を防止し、長期間安定して使用することが可能なプリーツフィルター、およびそれを用いた濾過装置としてのバラスト水処理装置および処理方法を提供することを目的とする。
前記プリーツフィルターで濾過されなかった排出水を前記ケースの外部へ排出する排出流路とを備えたバラスト水処理装置を含む。
11 フィルター基材
21、22、23、24 補強部材
12,13 蓋部材
25 山部補強部材
14 樹脂
41 ポンプ
42 濾過装置
43 殺滅装置
44 タンク
31、32、33、34、35、36 配管
102 被処理水ノズル
103 ケース
106 被処理水流路
107 濾過水流路
108 排出流路
121 ノズル口
131 外筒部
132 蓋部
133 底部
140 中心配管
141 取水穴
190 モーター
B 接着部
V 谷部
M 山部
以下、本願発明の態様について列記して説明する。
本願の一つの態様は、山部と谷部を繰り返すように折り目を有するフィルター基材を、前記折り目の稜線方向を軸方向とする筒形状としたプリーツフィルターであって、前記プリーツフィルターは筒形状内側に凸状となる谷部において、折り目の稜線方向に沿った接着補強部を備えるプリーツフィルターである。
本発明の実施形態としてのプリーツフィルターおよびバラスト水の処理装置の構成を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。
対象とするプリーツフィルターの代表的構成例を図1に模式的に斜視図として示す。図1のプリーツフィルター10は、板状のフィルター基材11を山谷交互に繰り返し折りたたむことでプリーツ形状を形成し、さらにその両端部を接続して全体を円筒状にしたものである。実際の使用時にはプリーツフィルター10は、円筒の上面および下面を別な部材にて塞ぐと共に形状を固定する。円筒フィルターの内部から外部に向けて、あるいは逆に外部から内部に向けて濾過を行う。本願の以下の説明においては、円筒内部側に突き出た折り目である図のV部を谷部と呼び、円筒外部側に突き出た折り目である図のM部を山部と呼ぶ。また、谷部の外側とは、谷部において円筒内部側から見た面を指す。谷部の内側とは、円筒外部側からみた谷部の面を指す。なお、図1はプリーツ形状を模式的に表しているものであって、実際の折り目は図のような理想的な鋭角にはならず、丸みを帯びた折り目となる場合が多い。
上述のプリーツフィルターを用いた濾過装置の好ましい適用例として、バラスト水処理装置の構成を、図面を参照して説明する。図11および図12は本発明の実施態様としての船舶用のバラスト水処理装置の一例を示す図である。図11は軸線を含む垂直断面の構成、図12は図11における水平A-A断面の構成をそれぞれ模式的に示す図である。円筒形状のプリーツフィルター101は回転中心となる軸線を囲むように配置されており、中心に配置された中心配管140(配管は回転しない)の周囲を回転自在になるよう取り付けられている。プリーツフィルター101の上下面は水密に塞がれている。なおプリーツフィルター101は、上下面を蓋部材で塞いだもの、すなわちプリーツフィルターカートリッジとして用いても良い。回転自在な取り付け構造は、同じく水密構造とする必要があるが、特に限定されることなく既知の構造が用いられる。フィルター全体を覆うようにケース103が設けられる。ケース103は外筒部131、蓋部132、底部133で構成され、底部133には排出流路108が設けられる。ケース103内に被処理水としての海水を導入するため被処理水流路106と被処理水ノズル102が設けられる。被処理水ノズル102は、そのノズル口121をケース103の外筒部131内に備えるように被処理水流路106から延設され、被処理水がプリーツフィルター101の外周面に向かって流出するように構成されている。また、プリーツフィルター101の回転のためにモーター190がプリーツフィルター101の中心軸に備えられている。モーター190は駆動制御部(図示せず)からの電力により駆動される。
図13は、上述したバラスト水処理装置を濾過装置42として用いた船舶用バラスト水処理システムの全体構成を模式的に示した説明図である。図13において、海洋から取水された海水である被処理水は配管31を経てポンプ41により送られ、配管32を通じて濾過手段である濾過装置42に供給される。濾過装置42において濾過された濾過水は配管33を経て紫外線照射装置や電解装置などの殺滅装置43(必須ではない。)に送られる。また、濾過装置42において濾過されなかった排出水は、配管35を経て装置外部へ導出される。殺滅処理を経た海水は、配管34、配管36を経てタンク44に送られる。
(補強部材の選定)
補強部材に用いる樹脂を次のように選定した。補強部材には、フィルター基材の変形に追随して変形できる柔軟性と剛性、繰り返し変形に対する強度、耐腐食性が必要である。また、製造上の取扱い、軽量化、コストダウン等の付帯的な要求性能も求められる。さらに補強部材には、接着補強部を構成するために、フィルター基材との接着性、溶着性があることが好ましい。このような観点から、素材に求められる性能を比較検討した結果を表1に示す。
補強部材による効果を確認するため、図11および図12に示すバラスト水処理装置を用いて、濾過をおこなった。プリーツフィルターの外径(円筒山部の円周直径)は700mm、軸方向長さ378mm、プリーツ深さ70mm、プリーツ数450折である。また、運転条件は、噴流流束6.9m/秒、ろ過流量71.7m3/時、排水流量14.3m3/時である。記載使用した材料は次の通りである。
フィルター基材:ポリエチレンテレフタレート製不織布(商品名:東レ製 アクスターG2260-1S BK0)
補強部材:ポリプロピレン製板材 厚さ公称値 1.0mm
山部折目をウレタン含浸補強(山部を中心に57mm幅)
山部補強部材:ポリプロピレン製網目板(商品名:タキロン製 トリカルネットSN-598)
網目ピッチ 4.8mm×4.8mm
厚さ公称値 1.5mm(縦糸1.5mm、横糸1.2mm)
・補強手段1:補強部材として幅20mmのポリプロピレン板を図4に示す構成でフィルター基材に超音波融着
・補強手段2:補強手段1と同じだが、幅20mmのポリプロピレン板を超音波融着する場所が、補強手段1とは左右反対側としたもの(左右反対側とは、図4に示す断面が円筒を上から見た断面だとして、図4では谷部Vの左側面に補強部材を有するのに対して、左右反対側とは谷部Vの右側面に補強部材を備えることを言う。)
・補強手段3:補強部材として幅20mmのポリプロピレン板を図6に示す構成でフィルター基材に超音波融着
・補強手段4:補強部材として幅3mmのポリプロピレン板を図3に示す構成でフィルター基材で包み込み、フィルター基材を超音波融着
・補強手段5:図2に示す構成で、谷部Vの折目から5mmの位置でフィルター基材同士を超音波融着
・補強手段6:比較例とするものであって接着補強部無し。ただし谷部にも山部と同様のウレタン含浸補強のみ有り。
・溶着時間:600msec
・ホールド時間:500msec
・空気圧:500kPa
・トリガー圧力:500N
・振幅:100%
・ホーンDownSpeed:60mm/sec
Claims (11)
- 山部と谷部を繰り返すように折り目を有するフィルター基材を、前記折り目の稜線方向を軸方向とする筒形状としたプリーツフィルターであって、
前記プリーツフィルターは筒形状内側に凸状となる谷部において、折り目の稜線方向に沿った接着補強部を備えるプリーツフィルター。 - 前記接着補強部は、前記折り目を構成する前記フィルター基材自体を熱融着により一体化されてなる請求項1に記載のプリーツフィルター。
- 前記接着補強部は、前記フィルター基材とは別体となる補強部材を有し、前記補強部材と前記フィルター基材が前記稜線方向に沿って接着されている請求項1に記載のプリーツフィルター。
- 前記接着補強部は、前記フィルター基材とは別体となる補強部材を有し、前記補強部材を包み込むように前記フィルター基材が前記稜線方向に沿って接着されている請求項1に記載のプリーツフィルター。
- 前記接着補強部は超音波接合により接着されている、請求項1から請求項4のいずれか1項に記載のプリーツフィルター。
- 前記フィルター基材はポリエチレンテレフタレート製不織布であり、前記補強部材はポリプロピレン、ポリエチレン、ポリアミド、ポリエステル、塩化ビニルからなる群から選択されるいずれかの樹脂の板状体である、請求項3または請求項4に記載のプリーツフィルター。
- 請求項1から請求項6のいずれか1項に記載のプリーツフィルターと、当該プリーツフィルターの上底部および下底部にそれぞれ備えた蓋部材とを有するプリーツフィルターカートリッジ。
- 前記プリーツフィルターカートリッジの円筒形状外側から見た山部裏側に、前記蓋部材において上下を固定された山部補強部材を備える請求項7に記載のプリーツフィルターカートリッジ。
- さらに前記山部の折目が稜線方向に沿った樹脂含浸補強を有する、請求項8に記載のプリーツフィルターカートリッジ。
- 請求項1~請求項6のいずれか1項に記載の円筒状のプリーツフィルターを濾過膜として用いたバラスト水処理装置であり、
前記プリーツフィルターは円筒上面と円筒底面をそれぞれ水密に封止し、かつ円筒軸を中心に回転可能に保持され、
前記プリーツフィルターの外周面に向けて被処理水を流出する被処理水ノズルと、
前記プリーツフィルターを囲むように設けられ前記被処理水ノズルのノズル口を内部に備えた外筒部を有するケースと、
前記プリーツフィルターを透過した濾過水を前記プリーツフィルターの円筒内部から前記ケースの外部へ導出する濾過水流路と、
前記プリーツフィルターで濾過されなかった排出水を前記ケースの外部へ排出する排出流路とを備えたバラスト水処理装置。 - 請求項10に記載のバラスト水処理装置を船体内に搭載し、船体外部から取得した海水を被処理水として用い、前記バラスト水処理装置により処理された濾過水にさらに殺滅処理を加えた後に、バラスト水として船体内に貯留するバラスト水の処理方法。
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CN201580042058.5A CN106573192A (zh) | 2014-09-04 | 2015-08-28 | 褶皱式过滤器、褶皱式滤筒以及均使用褶皱式过滤器的压载水处理装置和压载水处理方法 |
US15/500,535 US20170217557A1 (en) | 2014-09-04 | 2015-08-28 | Pleated filter, pleated filter cartridge, and ballast water treatment device and ballast water treatment method, each using same |
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JPS505975A (ja) * | 1973-05-18 | 1975-01-22 | ||
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KR20170048252A (ko) | 2017-05-08 |
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