JP2002186810A - Filter element for solid-liquid separation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter element for solid-liquid separation enabling the prevention of the early stage generation of a clogging phenomenon and the removal of clogging due to fluctuations of fine wires by winding fine wires within the depressed parts of filtering holes and extremely excellent in filtering capacity. SOLUTION: Filtering holes S having a coil-shaped depressed cross section holding minute intervals between adjacent wire materials are formed by winding the wire material 6 constant in thickness around the outside or inside of a cylindrical frame 1 in a coil shape and coil-shaped depressed parts A are provided to the filtering holes S and one or more fine wire 7 having a diameter larger than the width of each filter hole S and smaller than the thickness of the wire material 6 is wound along the recessed parts A in a coil shape so as to form minute flow channels to constitute the filter element for solid-liquid separation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to various liquids containing solid components, for example, processing liquids containing industrial contaminants, processing liquids for foods such as juices, processing liquids for brewing beers and alcoholic beverages, and more. TECHNICAL FIELD The present invention relates to a filtration element for solid-liquid separation used for various filtration applications such as a processing solution for production of various chemicals.

[0002]

2. Description of the Related Art Conventionally, generally, a wire material having a constant thickness such as a circular or triangular cross section is wound on the outside or inside of a cylindrical frame to form a minute gap between adjacent wire materials, and this is formed into a filtration hole. Are known.

[0003]

In such a conventional filter element, solid or viscous solid matter adheres as fine filter residue to a portion where a filter hole is formed, which is a major cause of clogging. There was a problem that it had to be removed by a scraper or backwash.

[0004] In particular, removal of filter residue by backwashing is uneconomical in that a clear solution that has been subjected to angle filtration is used, and is not a preferred treatment method.

Further, as disclosed in Japanese Patent Publication No. 61-24077, there is also known a method of improving the filtration performance by forcibly coating and embedding a particulate filtering agent in a recessed portion of a filtration hole. However, since such a filtering agent is a fine particle, the fine particles adhere to each other and the clogging phenomenon occurs quickly, and there is an inconvenience that the treatment for eliminating the clogging phenomenon is time-consuming and lacks practicality. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and prevents a wire from being clogged at an early stage by winding a fine wire in a recessed portion of a filter hole, and prevents the occurrence of clogging by changing the variation of the fine wire. Accordingly, an object of the present invention is to provide a filtration hole element for solid-liquid separation having extremely excellent filtration performance by removing a filter residue and effectively performing the filtration.

[0007]

The present invention has solved the above-mentioned problems by providing the following constitution.

(1) A wire material having a constant thickness is wound in a coil shape on the outside or inside of a cylindrical frame to form a coil-shaped filter hole having a concave cross section and having a small space between adjacent wire materials. A coil-shaped recess is formed in the filter hole, and one or more fine wires having a diameter larger than the width of the filter hole and smaller than the thickness of the wire material are formed along the recess to form a minute flow path. A filtration element for solid-liquid separation characterized by being wound in a coil shape.

(2) The cylindrical frame has a cylindrical frame structure through which liquid can flow, and the wire material has a triangular cross-section and is cut off at both corners on the bottom side on the side in contact with the filtrate to be recessed into the filtration hole. The filtration element for solid-liquid separation according to the above (1), wherein the filtration element is obtained.

(3) The cylindrical frame is a cylindrical frame structure through which liquid can flow, and the wire material has a circular cross section.
The filtration element for solid-liquid separation according to the above (1), wherein a recess is formed in a filtration hole between adjacent wire materials.

(4) The solid wire according to (1), wherein the fine wire is formed as a cross section having a different diameter, deformed, or reduced, so that a fine flow path can be formed in the recessed recess. Filtration element for liquid separation.

(5) The thin wire is relaxed and wound in the recess,
2. The filter element for solid-liquid separation according to claim 1, wherein displacement or vibration can be caused during a filtering operation.

(6) The solid-liquid according to (1), wherein the thin wire is formed of a shape memory alloy and can be deformed into a memory shape of the thin wire at a set temperature by a heating means such as energization. Filtration element for separation.

(7) The filtration element for solid-liquid separation according to the above (1), wherein the fine wire can be vibrated minutely by mechanical means.

[0015]

Embodiments of the present invention will be described below.

In each of the figures, reference numeral 1 denotes an inner hole 2 through which a filtrate passes.
And a cylindrical portion 4 having a plurality of communication holes 3 communicating with the inner hole portion 2, and a thread groove 5 formed in a coil shape on the outer peripheral surface of the cylindrical portion 4 while leaving both end portions 4 a and 4 b. It is a cylindrical frame formed by engraving. Reference numeral 6 denotes a coil-shaped wire material engaged in the screw groove 5 and wound around the outer periphery of the cylindrical frame 1. A coil-shaped filter material having a small gap between the coil-shaped wire materials 6 is provided. A hole S is formed.

In FIG. 4, the wire material 6 is formed of a wire material 6a having a triangular cross section, particularly an isosceles triangle.
Both corners 6a2 of the surface 6a1 facing the liquid to be filtered are cut in advance into a desired shape such as a straight line α or a curve (not shown), and the top 6a3 is engaged with the thread groove 5 of the cylindrical frame 1. Then, a recess A is formed between the adjacent wire materials 6, and a coil-shaped filter hole S having a minute width h is formed inside the recess A.

Reference numeral 7 denotes a thin wire wound in a recess A formed in the upper part of the filter hole S having a coil shape. The diameter h ₁ of the cross section of the wire is larger than the width h of the filter hole S. while smaller than the width h ₂ of the processing a, to be wound on a plurality of 1 or more as shown in FIG. In order to prevent the filtration hole S from being closed by winding the fine wire 7, the fine wire 7 is formed into a recess A by a different diameter wire, a different shape wire, a cross-sectional square shape, an uneven wire, a large number of protrusions, a minute meandering line, or the like. Are formed so that a minute flow path F can be formed therebetween.

Further, both ends of the fine wire 7 are extended from the cylindrical frame 1 and minute vibrations are given by various mechanical means such as ultrasonic vibrations, so that the fine wire 7 is finely vibrated in the recess A. And a configuration capable of removing clogging.

It is also possible to provide a configuration in which the fine wire 7 is formed of a shape memory alloy, and the thin wire 7 is deformed by supplying a current to the shape memory alloy to raise the temperature to a desired temperature.

As the simplest method, the fine wire 7 is displaced or vibrated during the filtering operation by relaxing and winding in the recess A so that the filtering operation and the clogging removing operation are simultaneously performed. Efficient clogging can be eliminated.

Because of the above-described configuration, the cylindrical frame 1
The various liquids to be supplied to the outside of the filter are filtered through a coil-shaped filtration hole S formed of the coil-shaped wire material 6, and the filtered clarified liquid is usually passed through the communication hole 3 through the inner hole 2. Means.

By the way, in the recess A of the filtration hole S, a thin wire 7
Since a fine flow path F is formed by winding one or more pieces, the liquid to be filtered has a filtering action equivalent to a kind of three-dimensional filtration between the recess A and the recess A by the fine wire 7 in the recess A. In this way, impurities can be effectively removed, and a solid having a desired width h is completely removed from the filtration hole S, so-called surface filtration can be performed.

The fine wire 7 can be placed in the recess A without protruding outward from the surface 6a1 of the wire material 6 facing the liquid to be filtered. The filter residue adhering to the outside of the wire material 6 by () can be mechanically removed.

Further, even if the adhesion of the filter residue occurs in the minute passage F, since the minute passage F is formed between the fine wires 7 and the recess A, the deposition phenomenon of the filter residue is reduced. Since the deposition rate is low and the deposition rate is low even if it occurs, the decrease in filtration ability due to clogging is reduced, and the filtration action is extremely high as compared with a conventional configuration in which a filtering agent using fine particles is coated.

By the way, when the clogging grows remarkably, the fine wire 7 can be finely vibrated or the fine wire 7 can be moved in the recess A by the deforming action of the fine wire by shape memory. By opening the minute flow path F, an effective filtering action can be performed again.

In the above, the wire material 6 forming the filtration hole S is
An example in which the filter is wound around the outside of the cylindrical frame 1 is shown, and an embodiment is directed to a so-called outer-inner type solid-liquid separation filtration element that circulates a liquid to be filtered inward from the outside. However, a so-called inner-outer method (shown in the drawing) in which a liquid to be filtered is transferred from the inside of the cylindrical frame 1 to the outside, in which the wire material 6 is wound inside the cylindrical frame 1 opposite to the embodiment. In the same manner, the filtration can be carried out in the case of (i). Filtration hole S,
The recesses A and the thin wires 7 are the same as those in the above-described embodiment, and thus description thereof is omitted.

The cylindrical frame may be formed in a tapered section.

FIG. 5 shows still another embodiment. This embodiment shows an example in which a wire material 6b having a circular cross section is used instead of the wire material 6a having a triangular cross section used in the above embodiment.

[0030] In this embodiment, since the line material 6b is a cross-sectional circular, when was MekuSo coiled, between adjoining lines material 6b, rest recess A ₁ was recessed are naturally formed, the concave shows a case where in the processing a ₁ filtered hole S of width h larger than rest recess a ₁ of width h ₂ is smaller than the cross-sectional diameter h ₁ line material 6b 1 or more sow, also configuration of the minute flow path F Since the filtering operation is the same as that of the above-described embodiment, detailed description thereof will be omitted.

In short, the winding of the fine wire 7 can be applied to a tubular element using any type of wire material in which a recess is formed above the filtration hole S.

[0032]

According to the present invention, a fine wire can be wound in the recess formed in the upper part of the filtration hole S to form a fine flow path, so that the filtration efficiency can be improved as a kind of three-dimensional filtration, and Since it is a thin line, there is an effect that the clogging phenomenon can be reduced by impurity deposition.

Even if clogging occurs, the thin wire can be moved by receiving the liquid pressure during passage of the liquid to be filtered during the filtering operation, or clogging can be removed by forcibly vibrating. There is an effect that it can be widely applied to filtration in all fields such as use, industrial use, and food use.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a filtration element for solid-liquid separation according to the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is an enlarged sectional view of a main part in FIGS. 1 and 2;

FIG. 5 is an enlarged sectional view of a main part showing another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylindrical frame 6 Coiled wire material of triangular cross section 6a Coiled wire material of triangular cross section 6b Wire material of circular cross section 7 Fine wire A, A ₁ Depressed recess S Filtration hole F Micro flow path

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 29/10 520Z 530A 29/38 580H 580C

Claims (7)

[Claims] 1. A wire material having a constant thickness is wound in a coil shape on the outside or inside of a cylindrical frame to form a coil-shaped filter hole having a concave cross section with a small space between adjacent wire materials. And providing a coil-shaped recess in the filter hole, forming at least one fine wire having a diameter larger than the width of the filter hole and smaller than the thickness of the wire material along the recess to form a minute flow path. A filtration element for solid-liquid separation characterized by being wound in a coil shape. 2. The cylindrical frame has a cylindrical frame structure through which liquid can flow, and the wire material has a triangular cross-section and is cut off at both corners on the bottom side on the side in contact with the filtrate, so as to be recessed into the filtration hole. 2. The filtration element for solid-liquid separation according to claim 1, wherein: 3. The cylindrical frame has a cylindrical frame structure through which liquid can flow, and the wire material has a circular cross section, and a concave portion is formed in a filtration hole between adjacent wire materials. The filtration element for solid-liquid separation according to claim 1, wherein: 4. The solid-liquid separation according to claim 1, wherein the fine wire is formed as a cross section having a different diameter, deformed or reduced, so that a fine flow path can be formed in the recessed recess. For filtration element. 5. The filter element for solid-liquid separation according to claim 1, wherein the thin wire is loosely wound in the recess so as to be displaced or vibrated during a filtering operation. 6. The solid-liquid separation according to claim 1, wherein the thin wire is formed of a shape memory alloy and can be deformed into a memory shape of the thin wire at a set temperature by a heating means such as energization. Filtration element. 7. The filter element for solid-liquid separation according to claim 1, wherein the fine wire can be made to vibrate minutely by mechanical means.