WO2008056635A1

WO2008056635A1 - Filtration device

Info

Publication number: WO2008056635A1
Application number: PCT/JP2007/071504
Authority: WO
Inventors: Shigeki Toyoda; Kazuya Ito
Original assignee: Nippon Eirich Co., Ltd.
Priority date: 2006-11-10
Filing date: 2007-11-05
Publication date: 2008-05-15
Also published as: JP2008119579A

Abstract

A filter (10) of a filtration device (1) has filtration plate members (16) layered on each other and on which projections (15) are arranged and also has pressing means (17). The pressing means (17) presses the filtration plate members (16) from both sides in the direction of an axis (CL) to integrate them together. The filtration plate members (16) are pressed against each other at the positions of the projections (15) by the pressing means (17), and as a result, columnar bodies (18) are formed. Openings (19) are dispersedly formed between the columnar bodies (18). When fluid (3) passes through the openings (19), particles (20) are removed. The size of the openings (19) is stabilized to allow the filtration device exhibit a highly accurate filtering function, and even if the filter (10) is clogged, it can be reused after disassembling and cleaning it.

Description

Specification

Filtration device

Technical field

The present invention relates to a filtration apparatus for filtering and removing particles (for example, suspended solids) contained in a fluid such as water by a filter unit.

Background art

[0002] Japanese Patent Application Laid-Open No. 2003-1017 describes a filtration device that increases a permeation area and increases a treatment capacity by filtering water with a filter layer configured of a compressed flexible weft filter. It is done.

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2003-1017

[0003] In recent years, the filtration accuracy required for filtration devices has become increasingly sophisticated. For example, is required filtration accuracy as the particle size of the particles to be removed from the liquid by filtration device is several m is Rukoto force ^s.

By the way, in the filtration device described in JP-A 2003-1017, it is structurally difficult to construct a filter having fine openings which can meet the above-mentioned requirements. Moreover, in the other conventional filtration devices, there is a problem that the finer the opening of the filter, the smaller the opening ratio becomes and it is not practical.

[0004] Conventionally, when the filter is clogged, it is washed by a force for removing deposits or by backwashing to restore the filtration function.

However, in such a method, it has been difficult to fully restore the filtration function. In addition, since filters that can not recover their filtration function must be discarded, resources are wasted and the environmental load is also S.

[0005] The present invention has been made to solve such a problem, and has a high precision filtration function by stabilizing the size of a large number of fine openings for fluid removal and removal of particles. The purpose is to provide a highly rigid and compact filter device that can be easily disassembled and cleaned to recover its filtration function and be reused even if clogging occurs. I assume. Disclosure of the invention

In order to achieve the above-mentioned object, a filtration device according to the present invention is a filtration device in which a filter unit for filtering a fluid is attached to the inside of a casing. The filter unit has a same or different shape, and a plurality of sheets overlapping in a direction orthogonal to the axial direction and having a laminated structure and a plurality of projections are disposed, And a pressing means for pressing the plurality of combined filter plates in the axial direction from both directions in the axial direction to unify the whole of the plurality of filter plate members in a decomposable manner. Then, the filtration plate members are pressed against each other by the pressing means at the positions of the respective convex portions to form columnar portions, and fine openings are dispersed to form a plurality of adjacent columnar portions. When the fluid passes through the opening, particles in the fluid are removed. As one preferable embodiment, the filtration plate has the same shape, and the plurality of projections are integrally or separately provided on the surface, and the projections of the one filtration plate are the other. By contacting the back surface of the filtration plate, the filtration plate members overlap to form the columnar portion!

As a preferable example, the cross-sectional shape of the filter portion when viewed in the axial direction is annular, and the plurality of convex portions are integrally or separately joined on the surface of the filtration plate material. The plurality of convex portions are arranged radially with respect to the center of the filter plate and uniformly in the circumferential direction. The clearance dimension of the opening is determined by the height dimension of the convex portion on the surface of the filtration plate material. The width dimension of the openings is determined by the pitch between the adjacent convex portions and the width dimension of the convex portions. Preferably, the convex portion is integrally formed on the surface of the filter plate by etching the portion other than the position where the convex portion is to be formed. The convex portion may be integrally provided on the surface of the filtration plate material by fixing another part to the filtration plate material by thermal spraying, an adhesive or the like.

In another preferred embodiment, one of the filter plate members is an annular inner ring material in which a plurality of outward projecting pieces project radially outward from an outer peripheral edge thereof, and the other filter plate member has an inner peripheral edge thereof. The force is also an annular outer ring material in which a plurality of inward projecting pieces project toward the center. Then, the inner ring material and the outer ring material having different shapes are alternately stacked. Thus, one or both of the outward projecting piece and the inward projecting piece exert the function of the convex portion to form the columnar portion and to form the opening.

Preferably, among the inner ring material and the outer ring material, the thickness of one of the members that exerts the function of the convex portion is thinner than the thickness of the other member. The opening is formed by sandwiching the one member between the upper and lower other members. The gap dimension of the openings formed by the convex portions is smaller than the gap dimension of the space in the filter portion. The fluid is caused to flow such that the small size opening is upstream of the fluid and the large size space is downstream.

For example, when viewed in the axial direction, the cross-sectional shape of the filter portion is an annular shape, a polygonal annular shape, a linear band shape, or a curved band shape.

The pressing means is attached to the bottom plate portion disposed at the bottom portion of the filter portion, the pressing plate disposed at the upper portion of the filter portion, and the bottom plate portion, and is extended and fixed in the axial direction at a central position. And a nut screwed into the support bolt. The end faces of one side of the plurality of filtration plate members overlapping each other to form a laminated structure are supported by the bottom plate portion, and the end faces of the other side are supported by the pressing plate. By screwing the nut into the support bolt and tightening it, the plurality of filtration plate members are sandwiched from both directions in the axial direction and integrated as a whole, and the nut is loosened to remove the pressing plate. It is preferable that the filtration plate can be disassembled into pieces.

As a preferable example, in the filtration plate material, a plurality of holes are bored at equal distances from the central position and at equal positions in the circumferential direction, and the holes are obtained by overlapping the plurality of filtration plate materials. When it is a hole for positioning so that it overlaps exactly in the radial direction and the circumferential direction, a plurality of positioning bars are attached to the bottom plate portion and are oriented in a direction parallel to the axis, center position Equidistantly from the center and equally spaced in the circumferential direction, a plurality of holes are bored equally in the circumferential direction at equal distances from the central position in the pressing plate; By engaging the holes of the filtration plate with the holes of the presser plate, the central positions of the plurality of filtration plate members can be aligned, and the circumferential positions can be aligned, and as a result , In front of the plurality of filter boards The convex portion is a straight A plurality of the columnar portions are formed in parallel to the axis line.

When assembling the filter unit, even if the filter plate members are slightly deformed, the filter members may be pressed from both directions in the axial direction with the pressing means in a state in which the plurality of filter plate members are stacked. The deformation of the plate is automatically corrected to a preferable laminated state.

For example, the above-mentioned filtration boards are stacked 200 to 1,000 to form a laminated structure. The material of the filtration plate material is a metal such as stainless steel or titanium, or a hardness of at least a predetermined value so that elastic deformation or plastic deformation is hardly caused when the plurality of filtration plate materials are stacked and pressed by the pressing means. It is preferable to use synthetic resin or ceramic.

For example, the fluid to be filtered by the filtration device is a liquid selected from the group consisting of food, paint, chemicals and oils, or air supplied to a clean room.

[0007] Since the filtration device of the present invention is configured as described above, it stabilizes the size of a large number of fine openings through which fluid passes and removes particles, and exhibits a highly accurate filtration function. Shall do it.

In addition, even if the filter unit is clogged, the filter unit can be easily disassembled and cleaned. Therefore, the filter function can be restored to reuse the filter section, and furthermore, the filter section can be made highly rigid and miniaturized.

Brief description of the drawings

FIG. 1 is a schematic configuration view of a filtration system having a filtration device of the present invention.

[FIG. 2] FIGS. 2 to 8 show the first embodiment of the present invention. Figures 2 (A) and 2 (B) are a plan view and a front view, respectively, of the filter section.

[FIG. 3] It is a perspective view showing a part of a filter part.

[FIG. 4] It is an exploded perspective view of a filter part.

FIG. 5 is an exploded cross-sectional perspective view of the filtration device.

[Fig. 6] Fig. 6 is a cross-sectional perspective view of the filtration device showing a state in which the filter portion is assembled.

[Fig. 7] Fig. 7 (A) is a sectional view taken along line VII in Fig. 6, and Figs. 7 (B) and 7 (C) are respectively

It is a B line sectional view, CC line sectional view. [FIG. 8] FIG. 8 shows a modification. Figs. 8 (A), (B) and (C) are equivalent to Figs. 7 (A), (B) and (C), respectively.

[Fig. 9] Fig. 9 is an exploded perspective view of a filter unit according to a second embodiment of the present invention, corresponding to Fig. 4.

FIG. 10 is a cross-sectional perspective view of the filtration device showing a state in which the filter unit is assembled.

[Fig. 11] Fig. 11 (A) is a sectional view taken along line XI of Fig. 10, Figs. 11 (B) and 11 (C) are sectional views taken along line B-B and CC of Fig. 11 (A), respectively. is there.

[FIG. 12] FIGS. 12 (A) and 12 (B) are respectively a schematic plan view of a filtration device according to another modification of the present invention, and a schematic plan view of a filter portion.

[FIG. 13] FIGS. 13 (A) and 13 (B) are respectively a schematic plan view of a filtration apparatus and a schematic plan view of a filter portion according to still another modification of the present invention.

[FIG. 14] FIGS. 14 (A) and 14 (B) are respectively a schematic plan view of a filtration device and a schematic plan view of a filter portion according to still another modification of the present invention.

FIG. 15 is a view showing experimental data such as thickness and aperture ratio of filtration plate material.

[Fig. 16] Fig. 16 is a diagram showing other experimental data on the thickness of the filtration plate, the gap size of the openings, and the aperture ratio.

FIG. 17 is a graph showing particle size distribution.

BEST MODE FOR CARRYING OUT THE INVENTION

The filter unit of the filtration apparatus according to the following embodiment includes a plurality of filtration plate materials and pressing means. The filter plates have the same or different shapes. A plurality of filter boards (for example, 200 to 1,000 sheets) overlap each other in a direction orthogonal to the axial direction to form a laminated structure. A plurality of convex portions are disposed on the filtration plate.

The pressing means presses the plurality of overlapping filtration plates from both directions in the axial direction, and integrates the plurality of filtration plates so that they can be disassembled.

And filtration board material is pressure-contacted in the position of each convex part, and the columnar part is formed. A plurality of fine opening force dispersions are formed between the adjacent columnar parts. By passing the fluid through the openings, particles in the fluid are removed. As a result, the size of the opening is stabilized and the high precision filtration function is exhibited, and the filter part is easily disassembled and washed to recover the filtration function, and the purpose is realized! Ru. [0010] The cross-sectional shape of the filter portion when viewed in the axial direction is often annular, but may be polygonal ring, linear band, curved band, or any other shape.

The fluid to be filtered by the filtration device may be a liquid such as water or oil, or a gas such as air or gas. Examples of the liquid include drinking water, foods such as tomato juice, paints, medicines, oils and the like. As the gas, for example, there is air supplied to a clean room of a semiconductor manufacturing apparatus.

The filtration device of the present invention can be disposed at the center of a cyclone to filter gases such as air and gas.

Example

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 17.

1 to 17 are diagrams for explaining the present invention. FIG. 1 is a schematic configuration view of a filtration system having a filtration device of the present invention. FIGS. 2 to 8 are views showing a first embodiment of the present invention, and FIGS. 2 (A) and 2 (B) are respectively a plan view and a front view of a filter section.

Fig. 3 is a perspective view showing a part of the filter unit, Fig. 4 is an exploded perspective view of the filter unit, Fig. 5 is an exploded cross-sectional perspective view of the filter device, and Fig. 6 is a filter device showing an assembled filter unit. It is a cross-sectional perspective view.

7 (A) is a cross-sectional view taken along line VII of FIG. 6, and FIGS. 7 (B) and 7 (C) are cross-sectional views taken along line B-B and line C-C of FIG. 7 (A), respectively. FIGS. 8 (A), (B) and (C) are views showing a modification of the first embodiment, and are respectively equivalent to FIGS. 7 (A), (B) and (C).

FIG. 9 is an exploded perspective view of a filter unit according to a second embodiment of the present invention, corresponding to FIG. FIG. 10 is a cross-sectional perspective view of the filtration device showing the assembled filter unit. 11A is a cross-sectional view taken along line XI of FIG. 10, and FIGS. 11B and 11C are cross-sectional views taken along line B-B and line CC of FIG. 11A, respectively.

12 (A) and 12 (B) are respectively a schematic plan view of a filtration device according to another modification of the present invention and a schematic plan view of a filter portion. FIGS. 13 (A) and 13 (B) are respectively a schematic plan view of a filtration apparatus and a schematic plan view of a filter portion according to still another modification of the present invention. FIGS. 14 (A) and 14 (B) are respectively a schematic plan view of a filtration device and a schematic plan view of a filter portion according to still another modification of the present invention. As shown in FIG. 1, a filtration device 1 (or filtration devices la to Id) of the present invention is provided in a filtration system 2. In the filtration system 2, water as a fluid is filtered to remove particles (eg, suspended solids) contained in water (raw water 3).

Raw water 3 that has not yet been filtered is stored in the raw water tank 4. The raw water 3 in the raw water tank 4 is supplied by the raw water pump 5 to the filtration device 1, la ̃; Id and filtered. Particles in the raw water 3 are removed by the filtration device 1, la to Id to obtain clean filtered water 6. The filtered water 6 is stored in the filtered water tank 7.

In the filtration device 1, la to Id, the filter unit 10 (or the filter unit 10 a to 10 d) for filtering water is attached to the inside of the casing 11 (or the casing 11 a to l id).

[0014] As the filtration device 1, la to Id is used, the filter portions 10, 10a to 10d gradually become clogged. When the clogging is light, the backwash pump 12 provided at the outlet of the filtered water tank 7 is driven.

Then, the filtered water 6 stored in the filtered water tank 7 is supplied to the filtration devices 1, 1a to Id by the backwashing pump 12 to backwash the filter units 10, 10a to 10d. Waste water 13 generated by backwashing is stored in a waste water tank 14.

During filtration with filtration device 1, la ~; Id, valve V of the outlet of raw water pump 5 and valve V2 in piping for flowing filtered water 6 from filtration device 1, la ~ Id to filtered water tank 7 It is open. Close the valve V3 at the outlet of the backwash pump 12 and the valve V4 in the piping for flowing the filter power also to the waste water tank 14. The raw water pump 5 is turned on and the backwashing pump 12 is turned off.

During the backwashing operation, the valves VI and V2 are closed, the valves V3 and V4 are opened, the raw water pump 5 is turned off, and the backwashing pump 12 is turned on.

As shown in FIGS. 2 to 8, the filter unit 10 according to the first embodiment includes a plurality of filtration plate members 16 and pressing means 17. The plurality of filter plates 16 have the same shape. The filter plate 16 has a laminated structure in which a plurality of sheets overlap each other in a direction orthogonal to the direction of the axis line CL. A plurality of projections 15 are disposed on the filtration plate 16 having a thickness t.

The pressing means 17 presses the plurality of overlapping filter plates 16 from both directions in the direction of the axis line CL, and integrates the plurality of filter plates 16 so that they can be disassembled. Then, in the filter unit 10, the filtration plate members 16 are pressed against each other by the pressing means 17 at the positions of the respective convex portions 15 to form the columnar portions 18. A plurality of minute openings 19 are dispersed between adjacent columnar portions 18 to form a plurality. By passing water (raw water 3) through the opening 19, the particles 20 in the raw water 3 are removed.

As described above, the filter unit 10 has a plurality of columnar portions 18. Therefore, the sizes of many fine openings 19 (for example, the gap size d and the width size e) for removing water (raw water 3 and filtered water 6) and removing the particles 20 are stabilized. As a result, the filter unit 10 can exhibit a highly accurate filtration function.

If the filter unit 10 is clogged, the filter unit 10 is first backwashed. If the filtration function does not recover even after backwashing, disassemble and wash the filter unit 10.

Thus, the filtration function of the filter unit 10 can be easily recovered and reused. Further, since the plurality of filtration plate members 16 are integrated by the pressing means 17, the filter unit 10 can be miniaturized with high rigidity.

The cross-sectional shape of the filter portion 10 when viewed in the direction of the axis line CL is annular. Therefore, each filtration board 16 having a laminated structure is also annular.

The material of the filter plate 16 is a metal such as stainless steel or a synthetic resin having a hardness of a predetermined value or more. If it is filtration board material 16 of these materials, when a plurality of filtration board materials 16 are piled up and it presses with pushing means 17, since elastic deformation and plastic deformation are hardly done, it is desirable.

In this way, the filter plate 16 hardly deforms, so the size of the large number of fine openings 19 can be maintained at a predetermined value, and the filter unit 10 can exhibit a highly accurate filtration function. In addition, the rigidity of the filter unit 10 can be maintained high.

Therefore, even if fluid pressure is applied to the filter plate 16 at the time of filtration, the filter plate 16 hardly squeezes or deforms. Therefore, a high-precision filtration function can be stably exhibited, which almost eliminates the possibility that the shape of the openings 19 changes during filtration.

A plurality of (here, three) holes 25 are formed in the filtration plate 16 at equal distances from the center position and at equal positions in the circumferential direction. The holes 25 are used to position the filter plates 16 so that they overlap exactly in the radial and circumferential directions when the filter plates 16 are stacked. Forgiveness.

On the surface of the filter plate 16, a plurality of projections 15 are separately formed by being separately joined as shown in FIG. The plurality of convex portions 15 are arranged radially with respect to the center of the filter plate 16 and equally spaced in the circumferential direction.

The height of the projections 15 on the surface of the filtration plate 16 is formed to a predetermined size. The height dimension of the convex portion 15 determines the clearance dimension d of the opening 19. Further, the width dimension e of the opening 19 is determined by the pitch P between the adjacent convex portions 15 and the width dimension f of the convex portions 15. Thus, the number, the shape, the position, the height dimension, the pitch P, the width dimension f and the like of the convex portions 15 formed on the filtration plate 16 are set to arbitrary values. By forming the projections 15 on the filtration plate 16, the openings 19 of the desired gap size d and width size e are formed.

When the convex portion 15 of one filtration plate member 16 abuts on the back surface 21 of the other filtration plate member 16, the filtration plate members 16 overlap with each other to form a columnar portion 18.

As a method of forming the convex portion 15, there is a method of corroding a portion other than the position where the convex portion 15 is to be formed by etching, and as a result, the convex portion 15 is integrally formed. In the first embodiment shown in FIGS. 2 to 7, the case where the convex portion 15 is integrally formed on the surface of the filter plate 16 is shown.

In addition, the projection 15 may be formed by fixing another part (for example, washer, spacer) by thermal spraying, an adhesive or the like. In the modified example shown in FIG. 8, the case where the convex portion 15 is formed as a separate part and this separate part is joined to the surface of the filtration plate 16 having a thickness t to integrate the convex portion 15 is shown. .

All filter plate members 16 constituting the filter unit 10 have the same shape. Therefore, the manufacture of the filtration plate 16 and the assembly work of laminating a large number of filtration plates 16 into a laminated structure are facilitated.

[0020] The casing 11 has a bottom plate 27 attached to the lower part of the cylindrical part 26, a flange 28 attached to the upper part of the cylindrical part 26, and a flange 28 attached to the cover 28 to close the opening. And 29.

The bottom plate 27 is connected with a pipe 30 for flowing the wastewater 13. A supply port 32 is formed in the cylindrical portion 26. The supply port 32 is in contact with the piping 31 to which the raw water pump 5 is connected. It is continued.

The inside of the casing 11 is partitioned by the filter unit 10. The outer peripheral side of the filter unit 10 is the raw water 3 supply side. The filtered water 6 filtered by the filter unit 10 flows into the inside of the filter unit 10.

The pressing means 17 has a bottom plate portion 27 disposed at the bottom of the filter portion 10 and a circular pressing plate 33 disposed at the top of the filter portion 10. Further, the pressing means 17 has a support bolt 34 attached to the bottom plate portion 27 and extended and fixed in the direction of the axis line CL at a central position, and a nut 35 screwed to the support bolt 34.

The end faces of one side of the plurality of filtration plate members 16 which are stacked to form a stacked structure are supported by the bottom plate portion 27, and the end faces of the other side are supported by the pressing plate 33. A plurality of (here, three) holes 37 are formed in the holding plate 33 at equal distances from the center position and equally in the circumferential direction.

By screwing the nut 35 into the support bolt 34 and tightening it, the plurality of filter plates 16 are sandwiched from both directions in the direction of the axis line CL and the whole is integrated. The plurality of filter plates 16 can be disassembled into pieces by loosening the nut 35 and removing the pressing plate 33.

A plurality of (in this case, three) positioning rods 36 are attached to the bottom plate 27. The bar 36 points in a direction parallel to the axis CL. In addition, the bars 36 are equally spaced from the center position and equally spaced in the circumferential direction.

The holes 25 of the filter plate 16 and the holes 37 of the pressure plate 33 are engaged with the bar 36. Thus, the center positions of the plurality of filtration plate members 16 can be made to coincide with each other, and the positions in the circumferential direction can also be made to coincide. As a result, the convex portions 15 of the plurality of filtration plate members 16 are linearly arranged, and the plurality of columnar portions 18 are formed in parallel with the axis line CL.

The filter unit 10 has a cylindrical portion 38 in which a plurality of filter plate members 16 have a laminated structure, a bottom plate 27 supporting the cylindrical portion 38 below the axis line CL, and a cylindrical portion 38 from above the axis line CL. And a pressing plate 33 for pressing. The filter unit 10 has a sealed structure. A pipe 39 for flowing the filtered water 6 to the filtered water tank 7 and a pipe 40 connected to the discharge side of the backwash pump 12 are attached to the holding plate 33.

The raw water 3 in the raw water tank 4 flows through the raw water pump 5 and the pipe 31, and the case 3 from the supply port 32. Flows into the building. Thus, the raw water 3 supplied to the outside of the filter unit 10 is filtered by the filter unit 10 to become filtered water 6 and flows inward of the filter unit 10. Thereafter, the filtered water 6 is stored in the filtered water tank 7 through the pipe 39.

In the filter section 10, the raw water 3 passes from the outside of the cylindrical section 38 through the large number of openings 19 between the filter plates 16 as shown by the arrow G. As a result, the particles 20 contained in the raw water 3 are removed and become clean filtered water 6 and flow inside the cylindrical portion 38.

Next, a filtration device la according to a second embodiment will be described.

The same or corresponding parts as in the first embodiment are designated by the same reference numerals and their description is omitted. Only different parts will be described.

As shown in FIGS. 1 and 9 to 11, in the filter device la, a filter unit 10a for filtering water (raw water 5) as a fluid is attached to the inside of the casing 11a.

The filter unit 10a includes an inner ring material 16al and an outer ring material 16a2 as filtration plate materials, and a pressing unit 17. The inner ring material 16al and the outer ring material 16a2 have shapes different from each other. The inner ring member 16al and the outer ring member 16a2 face each other in a direction orthogonal to the direction of the axis line CL, and a plurality of sheets are alternately overlapped to form a laminated structure. A plurality of convex portions 15a are disposed on the inner ring material (filter plate material) 16al.

The pressing means 17 presses a plurality of overlapping filtration plate members (inner ring member 16al, outer ring member 16a2) from both directions in the direction of the axis line CL, and integrates the plurality of filtration plate members so that they can be disassembled.

Then, in the filter portion 10a, the filter plate members (inner ring material 16al and outer ring material 16a2) are pressed against each other by the pressing means 17 at the positions of the respective convex portions 15a to form the columnar portions 18a.

Further, a plurality of fine openings 19a are formed in a dispersed manner between the adjacent columnar portions 18a. By passing the fluid (raw water 3) through the openings 19a, the particles 20 in the fluid (raw water 3) are removed.

As described above, the filter unit 10a has a plurality of columnar portions 18a. Therefore, the size of the large number of fine openings 19a for removing the particles 20 through which the raw water 3 passes is stabilized. As a result, the filter unit 10a can exhibit a highly accurate filtration function.

When clogging occurs in the filter unit 10a, first, backwashing is performed. Do backwashing Even when the filtration function does not recover, the filter unit 10a can be easily disassembled and washed to recover the filtration function for reuse.

Since the plurality of filtration plate members (inner ring member 16al and outer ring member 16a2) are integrated by the pressing means 17, the filter portion 10a can be miniaturized with high rigidity.

In the filter unit 10a, a cylindrical portion 38 is formed of two types of filtration plate materials. One of the filter plate members is an annular inner ring member 16al having a plurality of outwardly projecting pieces 45 projecting radially outward. Another filtration plate material is an outer ring material 16a2 having a thickness t in an annular shape. A plurality of inward projecting pieces 46 project from the inner peripheral edge of the outer ring member 16a2 toward the center.

The inner ring member 16al and the outer ring member 16a2 having different shapes are alternately overlapped and joined. As a result, one or both of the outward projecting piece 45 and the inward projecting piece 46 (in the present embodiment, the outward projecting piece 45) exhibit the function of the convex portion 15a to form the columnar portion 18a. Form an opening 19a.

In this way, there are two kinds of filtration plate materials, the inner ring material 16al and the outer ring material 16a2. However, the inner ring material 16al and the outer ring material 16a2 can be manufactured easily and in large numbers S by press working or the like. In addition, it is not necessary to form the projections on the surface of the filter plate by highly accurate processing.

The inner ring material 16al and the outer ring material 16a2 are alternately superposed. Accordingly, the outwardly projecting piece 45 of the inner ring material 16al is sandwiched between the upper and lower outer ring members 16a2, and the outwardly projecting piece 45 exerts the function of the convex portion 15a. The gap between adjacent convex portions 15a is 19a. The size of the opening 19a is, for example, a gap dimension d and a width dimension e.

The inward projecting pieces 46 of the outer ring member 16a2 are in a state of being sandwiched by the upper and lower inner ring members 16al. Spaces 47 communicate with the openings 19a, with spaces 47 between the inward projecting pieces 46 which are adjacent to each other. The clearance dimension t of the space 47 is larger than the clearance dimension d of the opening 19a. Therefore, in the cylindrical portion 38 of the filter portion 10a, when the raw water 3 passes from the outer peripheral surface 48 through the opening 19a Removed (arrow Gl). Thereafter, the filtered water 6 flows from the inner circumferential surface 49 of the cylindrical portion 38 through the space 47 as shown by the arrow G2. In the filter portion 10a, the thickness (here, thickness d) of one member (here, the inner ring material 16al) which exhibits the function of the convex portion 15a among the inner ring material 16al and the outer ring material 16a2 The thickness (in this case, the thickness t here) of the member (in this case, the outer ring member 16a2) is smaller.

Further, between the upper and lower outer ring members 16a2 having a thickness t, an opening 19a having a gap size d is formed in the outer peripheral surface 48 with the inner ring member 16al having a thickness d interposed therebetween. As a result, the gap dimension d of the opening 19a formed by the projection 15a is smaller than the gap dimension t of the space 47 in the filter portion 10a.

Then, the raw water 3 is made to flow so that the small-sized opening 19a is upstream of the fluid (water) and the large-sized space 47 is downstream. Therefore, the particles 20 to be filtered in the raw water 3 are collected at the opening 19a of the filter portion 10a (ie, the outer peripheral surface 48 of the filter portion 10a) and do not enter the space 47.

As a result, there is no risk that particles 20 will gradually accumulate in the space 47 in the filter section 10a. In addition, the particles 20 adhering to the outer peripheral surface 48 are removed and the filter portion 10a is easily backwashed with a force S.

In the filtration device la, in the inner ring material 16al and the outer ring material 16a2 as filtration plate materials, a plurality of holes 25 are bored at equal positions in the circumferential direction at equal distances from the center position. When the plurality of inner ring members 16al and the outer ring member 16a2 are overlapped, the holes 25 are positioned for accurate overlapping in the radial direction and the circumferential direction.

A plurality of positioning bars 36 are attached to the bottom plate portion 27, face in a direction parallel to the axis line CL, and equally spaced from the center position at equal distances in the circumferential direction. A plurality of holes 37 are bored in the holding plate 33 at equal distances from the central position and equally in the circumferential direction. Engage with 37. As a result, the central positions of the plurality of inner ring members 16al and the outer ring member 16a2 can be matched, and the circumferential positions can also be matched. As a result, since the plurality of inner ring members 16al and the convex portions 15a of the outer ring member 16a2 are linearly arranged, a plurality of columnar portions 18a are formed in parallel with the axis line CL.

As a modification of the second embodiment, the inward protruding piece 46 of the outer ring member 16a2 has a function of a convex portion. It is also possible to form a columnar portion and to form an opening on the inner circumferential surface 49 of the filter portion.

In the case of this modification, it is necessary to make the thickness of the outer ring member 16a2 exhibiting the function of the convex portion thinner than the thickness of the inner ring member 16 al. An opening is formed on the inner circumferential surface 49 with the outer ring member 16a2 interposed between the upper and lower inner ring members 16al. As a result, the dimension of the gap formed by the convex portion is smaller than the dimension of the space in the filter portion.

Then, the raw water 3 is flowed so that the small-sized opening is upstream of the fluid (water) and the large-sized space is downstream. Therefore, the particles 20 to be filtered in the raw water 3 are collected at the openings of the inner peripheral surface of the filter portion and do not infiltrate into the space. As a result, there is no risk that particles 20 will gradually accumulate in the space within the filter section. In addition, the particles 20 attached to the inner circumferential surface 49 can be removed and the filter portion can be easily backwashed.

The cross-sectional shape of the filter portion when viewed in the direction of the axis line CL may be a polygonal ring, a straight band, or a curved band.

For example, in the filtration device lb shown in FIG. 12, the cross-sectional shape force S of the filter portion 10b and the case of a triangular ring among the polygonal ring are shown. In the filtration device lb, the filter unit 10b that filters fluid (water) is installed inside the casing l ib.

The filter unit 10 b includes a plurality of triangular filter plates 16 b and pressing means 17 b. The filter plate 16b has the same (or different) shape. A plurality of filtration plate members 16 b are laminated in a stacked structure, with a direction perpendicular to the direction of the axis line CL. A plurality of projections 15 are disposed on the filtration plate 16b.

The pressing means 17b presses the plurality of overlapping filter plates 16b from both directions in the direction of the axis line CL, and integrates the whole of the filter plates 16b so that they can be disassembled.

Then, the filtration plate members 16 b are pressure-welded with each other by the pressing means 17 b at the positions of the convex portions 15 to form the columnar portions 18 b. Further, a plurality of minute openings 19b 1S are dispersed and formed between the adjacent columnar parts 18b. As the fluid passes through the openings 19b, particles in the fluid are removed.

The filter section 10c of the filtration device lc shown in FIG. 13 has a cross-sectional shape as viewed in the direction of the axis line CL. The shape is a straight band. The filter part 10d of the filtration device Id shown in FIG. 14 has a curved band shape in cross section when viewed in the direction of the axis line CL.

In the filtration device lc, Id, filter units 10c, 10d for filtering fluid (for example, water) are attached to the inside of the casing 1 lc, 11d, respectively.

The filter unit 10c shown in FIG. 13 includes a plurality of filtration plate members 16c and pressing means 17c. The filter plate 16c has the same (or different) shape. Filter board

A plurality of sheets 16c overlap each other in a direction perpendicular to the direction of the axis line CL to form a laminated structure. A plurality of projections 15 are disposed on the filtration plate 16c.

The pressing means 17c presses the plurality of overlapping filtration plates 16c from both directions in the direction of the axis line CL, and integrates the plurality of filtration plates 16c so that they can be disassembled.

Then, at the position of the convex portion 15, the filtration plate members 16c are pressed against each other by the pressing means 17c to form a columnar portion 18c. Also, between the adjacent columnar parts 18c, fine openings 19c are formed.

, Are dispersed and formed in plurality. As fluid (eg, water) passes through the openings 19c, particles in the fluid are removed.

The filter section 10d shown in FIG. 14 has a curved band shape in cross section when viewed in the direction of the axis line CL. The filter unit 10d includes a plurality of filtration plate members 16d and pressing means 17d. The plurality of filter plates 16 d have the same shape. A plurality of filtration plate members 16d are stacked in a stacked structure, with a direction perpendicular to the direction of the axis line CL. A plurality of projections 15 are disposed on the filtration plate 16d.

The pressing means 17 d presses the plurality of overlapping filtration plates 16 d from both directions in the direction of the axis line CL, and integrates the plurality of filtration plates 16 d so that they can be disassembled. Then, the filtration plate members 16 d are pressed against each other by the pressing means 17 d at the positions of the respective convex portions 15 to form a columnar portion 18 d. In addition, fine gaps 19d are formed between adjacent columnar parts 18d.

A plurality of 1S are dispersed and formed. As the fluid passes through the openings 19d, particles in this fluid are removed.

[0035] As described above, in the filtration device lb or filtration device lc, Id), the filtration plate 16b (or the filtration plate 16c, 16d) has the same shape. A plurality of convex portions 15 are separately or separately provided on the surface of the filter plate. The convex portion 15 of the first filtration plate 16b (or the filtration plate 16c, 16d) is in contact with the back surface of the other filtration plate 16b (or the filtration plate 16c, 16d). As a result, the filtration plate members overlap with each other, and the columnar portions 18b form columnar portions 18c and 18d).

By etching away portions other than the positions where the projections 15 are to be formed, as a result, the projections 15 are integrally formed on the surfaces of the filtration plate members 16b to 16d. The projections 15 may be integrally provided on the surfaces of the filtration plate members 16b to 16d by fixing other parts to the filtration plate members 16b to 16d by thermal spraying or an adhesive.

In the filtration device lb or filter device lc, Id, the pressing means 17b (or the pressing means 17c, 17d) is disposed at the bottom of the filter unit 10b (or the filter unit 10c, 10d) A bottom plate portion, a pressure plate disposed at the top of the filter portion, a support bolt attached to the bottom plate portion and fixed at a central position and extending in the direction of the axis CL, and a nut screwed on the support bolt Have /!

The plurality of filtration plate members 16b overlapping each other to form a laminated structure, the end surfaces of one side of the filtration plate members 16c and 16d) are supported by the bottom plate portion, and the other end surfaces are supported by the pressing plate.

Then, a nut is screwed into the support bolt and tightened. As a result, the plurality of filtration plate members 16b, the filtration plate members 16c and 16d) are sandwiched from both directions in the direction of the axis line CL, and the whole is integrated. Also, if the holding plate is removed by loosening the nut, the plurality of filtration plate members 16b and 24f can separate the filtration plate members 16c and 16d) into pieces.

Also in the filtration device lb, lc, Id having the above-mentioned configuration, the same operation effect as the two embodiments described above can be obtained.

FIG. 15 is a diagram showing experimental data such as the thickness of the filtration plate and the aperture ratio.

FIG. 15 (A) shows a conventional filter section in which a plurality of annular plate members are stacked and a washer (spacer) is sandwiched between the plate members to form an opening. Figure 15 (B), (

C) shows the case where a force filter unit 10 is used in the first embodiment.

As can be seen from FIG. 15, if the filter unit 10 of the present invention is adopted, the gap size d of the opening 19 can be made minute. Since the thickness t of the filter plate 16 can be reduced compared to the conventional case, it is possible to increase the aperture ratio of the filter unit 10 S. In the conventional product (Fig. 15 (A)), it was difficult to reduce the gap size d of the openings to 100 m or less. On the other hand, according to the present invention (FIGS. 15 (B) and (C)), it is possible to make the gap dimension d of the openings extremely fine as 75, 50, 25, 20, 15 m. . In addition, the power ratio S is greatly improved.

FIG. 16 is a diagram showing other experimental data on the thickness of the filtration plate, the gap size of the openings, and the aperture ratio.

The conventional product in FIG. 16 is the same as the conventional product shown in FIG. 15 (A). That is, the conventional product is a filter portion in which an opening is formed by stacking a plurality of annular plate members and sandwiching a washer (spacer) between the plate members.

On the other hand, with regard to the product of the present invention, experiments were conducted on one type of filter section 10 shown in the first embodiment, and experiments were conducted on four types of filter section 10a shown in the second embodiment. In the data of the second embodiment, the thickness t of the filtration plate material is the thickness of the outer ring material 16a2. The gap dimension d of the aperture is the gap dimension d of the aperture 19a formed by the outwardly projecting piece 45 (i.e., the convex portion 15a) of the inner ring member 16al.

As can be seen from FIG. 16, in the present invention, the gap dimension d of the openings can be reduced. In addition, since the thickness t of the filtration plate can be reduced, the aperture ratio is increased and the filtration efficiency is improved.

FIG. 17 is a graph showing the particle size distribution when an experiment was conducted with the filtration device 1 of the first example. The horizontal axis and the vertical axis indicate the particle size and particle size distribution of the particles, respectively.

As shown in FIG. 17, the raw water before filtration (curve L1) contained particles with a particle size distribution of !! to 400 m. On the other hand, the particle size distribution of the particles contained in the filtered water (curve L2) after filtration by the filtration device 1 is;! To 48 m. Therefore, in the filtration device 1, particles in the range of 49 to 400 * 111 are removed, and it can be seen that a highly accurate filtration function is exhibited.

As described in the above-described respective embodiments and modifications, according to the filter portion of the present invention, the filtration plate members are pressure-welded by the pressing means at the positions of the respective convex portions to form the columnar portions. Since the plurality of columns support the filter, the rigidity of the entire filter is increased. As a result, the openings formed between the column-like portions maintain their predetermined shape and stabilize their size, and the height is high. Accurate filtration function is exhibited.

A plurality of filter plates of the same or different shapes are laminated,

It can be positioned at 36. Therefore, the filter section is excellent in reproducibility after disassembly and assembly. The filter section has a laminated structure, so the shape can be designed arbitrarily. By increasing or decreasing the number of filter plates, the filtration area can be freely adjusted, which is convenient in design. If a part of the filter section is damaged, only the damaged filter plate can be replaced, and the remaining filter plate can be reused as it is.

The entire filter section can be broken apart. Therefore, the filtering function can be restored to the initial state by completely removing the foreign matter adhering to the opening.

Since the rigidity of the filter part is high and the gap dimension d and width dimension e of the opening are small, it is almost impossible for the filter plate to be stagnant or deformed. In addition, the size of the openings can be maintained to a predetermined size, and a highly accurate filtration function can be exhibited.

In the filter portion of the present invention, the plurality of filtration plate members are pressure-welded by the pressing means, and as a result, the openings are formed. Therefore, even if force is applied to the open area due to fluid flow or particle collision, the size of the open area is stable.

In the past, filters were clogged and discarded. On the other hand, in the present invention, even if the filter portion is clogged, it can be easily backwashed, disassembled, washed and reused. Therefore, it is less likely to put an impact on the environment by effectively using resources.

The particles removed by the filter may be valuable substances such as gold and silver. In such a case, if the filter section is disassembled and washed, it is possible to recover almost all the useful substance S.

When assembling the filter unit, even if the filter plate material is slightly deformed, the filter plate material may be pressed from both directions of the axial direction by the pressing means in a state where a plurality of filter plate materials are stacked. In this way, the deformation of the filter plate is automatically corrected and a preferable laminated state is obtained.

The material, shape, thickness and the like of the filtration plate material can be arbitrarily selected according to the user's requirements regarding the gap dimension d, width dimension e and aperture ratio of the opening. Filter boards are made of materials with little elastic deformation and plastic deformation, and there are few restrictions on the materials used. If the filter plate is made of metal (for example, stainless steel, titanium) or ceramic, the filter portion can be made excellent in heat resistance and corrosion resistance.

With conventional cloth filters and the like, there is a risk that particles will be generated from the filter itself during filtration and contaminate the filtered water. On the other hand, when the filter plate material of the present invention is formed of metal or ceramic, almost no particles are generated from the filter portion itself, and clean filtered water can be obtained.

The embodiments of the present invention (including the modified examples, the same in the following) have been described above, but the present invention is not limited to the above-described embodiments and various modifications may be made within the scope of the present invention. Addition is possible.

The same reference numerals in the drawings indicate the same or corresponding parts.

Industrial applicability

The present invention is applicable to a filtering device for removing fine particles contained in a fluid such as a liquid or gas.

Claims

The scope of the claims

The filter unit (10, 10a to 10d) for filtering the fluid (3) is a filtration device (1 to la; Id) attached to the inside of the casing (11, 11a to l id),

Said filter part (10, 10a-10d) tt,

A filtration plate material (16, 16b having the same or different shapes and having a stacked structure in which a plurality of sheets overlap in a direction perpendicular to the axis direction (a direction orthogonal to the CU direction and has a plurality of convex portions (15, 15a) ~ 16d, 16al, 16a2),

And a pressing means (17, 17b to 17d) for pressing the plurality of overlapping filtration plates together in such a manner that the plurality of filtration plates are pressed from both directions of the CU direction to unify the whole of the plurality of filtration plates.

The filtration plate members are pressed against each other by the pressing means at the positions of the respective convex portions (15, 15a) to form columnar portions (18, 18a to 18d), and fine portions are formed between the adjacent columnar portions. A plurality of fine openings (19, 19a to 19d) are dispersedly formed,

A filter device characterized in that particles (20) in the fluid (3) are removed by passing the fluid (3) through the openings (19, 19a to 19d).

The filtration device according to claim 1, wherein

The filtration plate members (16, 16b to 16d) have the same shape, and on the surface thereof, the plurality of convex portions (15) are separately or separately provided.

The convex portion (15) of one of the filter plate members (16, 16b to 16d) abuts on the back surface of the other filter plate members (16, 16b to 16d) to obtain the filter plate members (16, 16b to 16d). 16d) overlap each other to form the pillars (18, 18b to 18d)!

The filtration device according to claim 2, wherein

The cross-sectional shape of the filter portion (10 when viewed from the CU direction is an annular shape;

On the surface of the filtration plate material (16), the plurality of convex portions (15) are integrally formed separately or separately,

The plurality of convex portions (15) are arranged radially with respect to the center of the filtration plate (16) and uniformly in the circumferential direction, The height dimension of the convex portion (15) on the surface of the filtration plate (16) determines the clearance dimension (d) of the opening (19),

The width dimension (e) of the opening (19) is determined by the pitch (P) between the adjacent convex portions (15) and the width dimension (f) of the convex portions (15).

It is a filtration apparatus of Claim 2 or 3, Comprising:

By etching away portions other than the positions where the convex portions (15) are to be formed, as a result, the convex portions (15) are integrally formed on the surface of the filtration plate material (16, 16b to 16d). It is formed.

It is a filtration apparatus of Claim 2 or 3, Comprising:

The projection (15) is integrated with the surface of the filter plate (16, 16b to 16d) by fixing another part to the filter plate (16, 16b to 16d) by thermal spraying or an adhesive. Provided. The filtration device according to claim 1, wherein

The first filtration plate material is an annular inner ring material (16al) in which a plurality of outward projecting pieces (45) radially project outward from the outer peripheral edge thereof,

The other filtration plate material is an annular outer ring material (16a2) in which a plurality of inward protruding pieces (46) protrude from the inner peripheral edge toward the center,

By alternately overlapping the inner ring material (16al) and the outer ring material (16a2) having different shapes from each other, one or both of the outward projecting piece (45) and the inward projecting piece (46) The function of the convex portion (15a) is exhibited to form the columnar portion (18a) and the opening (19a).

The filtration apparatus according to claim 6, wherein

In one of the inner ring material (16al) and the outer ring material (16a2), the thickness of one of the members exerting the function of the convex portion (15a) is made thinner than the thickness of the other member,

The opening (19a) is formed by sandwiching the one member between the upper and lower other members,

The gap dimension (d) of the opening (19a) formed by the projection (15a) is smaller than the gap dimension (t) of the space (47) in the filter section,

Small size! /, The opening (19a) is upstream of the fluid (3), large size! /, Before The fluid (3) is caused to flow so that the space (47) is downstream.

A filtration apparatus according to any one of claims 1, 2, 3, 6 or 7, wherein

The cross-sectional shape of the filter portion (10, 10a to 10d when viewed from the CU direction) is an annular ring, a polygonal ring, a linear band, or a curved band.

A filtration apparatus according to any one of claims 1, 2, 3, 6 or 7, wherein

The pressing means (17, 17b to 17d) are disposed at the bottom of the filter unit (10, 10a to 10d) and disposed at the top of the bottom plate (27) and the top of the filter Screwed into the support bolt (34) and the support bolt (34) which is attached to the bottom plate (27) and which is attached to the bottom plate (27) at a central position and extends in the direction of the CU (34) The plurality of filtration plate members (16, 16b to 16d, 16a 1, 16a 2), which have a laminated structure by overlapping each other, have one end face of the bottom plate portion (27). And the other end face is supported by the pressing plate (33),

By screwing the nut (35) into the support bolt (34) and tightening it, the plurality of filtration plate materials (16, 16b-16d, 16al, 16a2) are pinched with an axial line (bi-directional force in the CU direction). The plurality of filtration plate members (16, 16b to 16d, 16al, 16a2) can be disassembled separately by unifying the whole and loosening the nut (35) and removing the pressing plate (33).

The filtration device according to claim 9, wherein

In the filtration plate material (16, 16al, 16a2), a plurality of holes (25) are bored at equal distances from the central position and at equal positions in the circumferential direction, and the holes (25) These holes are used to position the filter plates (16, 16al, 16a2) so that they overlap exactly in the radial and circumferential directions.

A plurality of positioning bars (36) are attached to the bottom plate portion (27), are oriented in a direction parallel to the axis (the same direction, and equally spaced from the central position in the circumferential direction). ,

A plurality of holes (37) are provided in the pressing plate (33) at equal distances from the center position and equally in the circumferential direction,

The bar (36), the hole (25) of the filtration plate material (16, 16al, 16a2), and the presser By engaging the holes (37) of the plate (33), the central positions of the plurality of filtration plate members (16, 16al, 16a2) can be made to coincide, and the circumferential positions can also be made to coincide. As a result, the convex portions (15, 15a) of the plurality of filtration plate members (16, 16al, 16a2) are linearly arranged, and the axis line (the plurality of columnar portions (18, 18a parallel to the CU) ) Is formed

[11] A filtration apparatus according to claim 1, 2, 3, 6 or 7, wherein

When assembling the filter unit (10, 10a 10d), even if the filtration plate members (16, 16b to 16d, 16al, 16a 2) are slightly deformed, the pressing is performed in a state where the plurality of filtration plate members are superposed. If these filter plates are pressed from both directions in the CU direction by means (17, 17b to 17d), the deformation of the filter plates is automatically corrected and a preferable lamination state is obtained.

[12] The filtration device according to claim 1, 2, 3, 6 or 7, wherein the filtration plate members (16, 16b 16d, 16al, 16a2) have a stack structure by overlapping 200 to 1,000 sheets. There is no.

[13] A filtration device according to claim 1, 2, 3, 6 or 7, wherein

When the plurality of filtration plate materials (16, 16b to 16d, 16al, 16a2) are overlapped and pressed by the pressing means (17), the filtration plate material (16, The material of 16b to 16d, 16al, 16a2) is a metal such as stainless steel or titanium, or a synthetic resin or ceramic having a predetermined hardness or more.

[14] A filtration device according to claim 1, 2, 3, 6 or 7, wherein

The fluid (3) to be filtered by this filtration device (1, la to Id) is a liquid selected from the group consisting of food, paint, medicine and oils, or air supplied to a clean room