JP2000254678A - Contact material for water treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent contact material having high strength and excellent dimensional stability and free from the falling out of projected fibers from a core body part. SOLUTION: In this contact material 1 for water treatment, which forms branched parts 3 obtained by projecting the weft 7, 7a, 7b in the side direction from both edges of a core body part 2 composed mainly of a narrow textile 4, both half parts of the textile 4 constituting the core body part 2 in the width direction is composed of the weft 7a and 7b and the warp 6 respectively, the welt 7a and 7b constituting each half part is respectively turned around at the center part of the textile 4 and bound together at the turning part and the weft 7a, 7b are projected from the side edge of the textile 4 to form a looped branched part 3. Because the strength of the textile 4 is high and the elongation at the time of placing load is small, excellent dimensional stability is attained and the breaking or the elongation of the core body part 2 is prevented at the time of drawing up from water to regenerate the purification function of the contact material 1. Each of the weft 7a, 7b constitutes every half of the textile 4 and bound together at the center part of the textile 4 and then, the falling out of the weft 7 from the core body part 2 or the deformation of the branched part 3 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly applied to the biological oxidation treatment of sewage in rivers, lakes and sewage treatment plants, etc., to promote the biological oxidation of water by installing the sewage in the wastewater. It relates to a contact material used to perform the contact. In addition, this contact material is not limited to use in biological treatment of sewage, but is also useful as artificial seaweed for spawning fish and shellfish.

[0002]

2. Description of the Related Art Generally, in lakes and marshes, water stains are decomposed by the action of microorganisms, and water is purified. Utilizing such water purification action of microorganisms, purification of highly polluted sewage such as sewage and agricultural settlement drainage is performed.

[0003] As such a method, conventionally, a contact material is installed in a sewage tank, the sewage is caused to flow while aerated, and the microorganisms are supported using the contact material as a carrier. Purification of sewage is carried out by aerobic decomposition of pollutants by the action of microorganisms.

The method of purifying sewage substances by the action of microorganisms is similar to the action in natural ecosystems, requires little energy such as heat, has a low lining cost, and generates harmful substances. There are many advantages such as no installation space and a small installation space.

[0005] In this specification, the term "microorganism" includes not only unicellular organisms such as bacteria and protists, but also fungi and metazoans, and has an action of biochemically decomposing pollutants in water. It is a general term for small creatures.

[0006] In this type of method, various proposals have been made with respect to a contact material for supporting microorganisms, and in particular, those having a structure in which a filament is protruded from the outer peripheral surface of a core, have been proposed. It attracts particular attention because of its excellent microbial adhesion and sludge treatment capacity. As a technique relating to a method for producing this type of contact material, Japanese Utility Model Laid-Open No. 57-69886,
JP-B1-31436, JP-B1-48833, JP-A-9-275842, JP-A-10-216764
And Japanese Patent No. 2528325 are known.

[0007]

Generally, in this type of sewage purification method, a large number of contact materials are vertically stretched between supporting means such as pipes installed near the water surface and the water bottom, and the water is purified from the water bottom. Aeration is performed by blowing air.

[0008] Here, microorganisms adhering to the contact material biochemically react the oxygen taken in by the aeration with the contaminants to decompose the contaminants. As the capacity decreases, it is necessary to remove and clean the contact material to regenerate the purification capacity. At this time, it is necessary to pull up the unit in which the contact material is stretched over the support means from the water as a whole, or to drain the water in the tank and take out the contact material into the air.

However, when the contact material is taken out of the water as described above, the buoyancy acting on the contact material is lost in the water, and the weight of the water or microorganisms attached to the contact material is reduced by the weight in the length direction of the contact material. Will join. In particular, this type of contact material protrudes a large amount of fibers outward in order to increase the adhesion area of microorganisms, where a large amount of microorganisms and their carcasses adhere and further contain a large amount of water Therefore, the weight of the contact material becomes extremely heavy, and the contact material may be cut.

Japanese Utility Model Application Laid-open No. Sho 57-69886 and Tokuhei 1
No.-48833 uses a braid as a core body, and easily stretches when a large force is applied in the length direction, and lacks dimensional stability. Further, in these structures, since a part of the core yarn is drawn out from between the structures of the braid to form a loop, if a large amount of the core yarn is pulled out, the braid structure may be disturbed and the strength may be reduced.

[0011] Further, since the structure disclosed in Japanese Patent No. 2528325 is made of a knitted fabric, it lacks dimensional stability and shape stability, and is easily deformed when a force is applied. Can not.

[0012] Also, the structure described in Japanese Patent Publication No. 31436/1990 has a structure in which a loop is formed by loosening a thread bundled on the outer periphery of a core wire, so that the loop and the adjacent loop are continuous. If a force is applied to some of the loops, the yarn may shift between the loops and some of the loops may be elongated, and the shape is not stable.

[0013] Further, in the device described in Japanese Patent Application Laid-Open No. Hei 10-216764, the thread extending in the length direction of the contact material protrudes sideways on the way to form a loop. When a large force is applied in the direction, the loop may move to the core and expand, and the function is reduced because the loop shrinks.

Further, in Japanese Unexamined Patent Publication No. 9-275842, a woven structure is used for the core portion, and the warp of the woven structure bears the strength in the length direction. Is large and has little elongation. However, since the weft in the woven structure protrudes on both sides of the core, if the width of the core is narrow, the weft is not sufficiently restrained, and the weft is easily pulled out of the core.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an excellent contact material having high strength, excellent dimensional stability, and preventing a projected thread from coming off a core body. It is assumed that.

[0016]

According to the present invention, there is provided a branch made by projecting the weft yarn laterally from both side edges of a core body mainly composed of a narrow fabric made of a warp yarn and a weft yarn. In the water treatment contact material having the formed portion, both halves in the width direction of the woven fabric constituting the core body portion are each constituted by separate weft yarns and warp yarns, and the weft yarn constituting each half portion is located at the center of the woven fabric. And the stitches are stitched to each other at the inversion portion, and the weft threads protrude from the side edges of the fabric to form loop-shaped branches.

In the present invention, it is preferable to use a multifilament yarn as the weft yarn. Further, as the material of the weft yarn, it is preferable to use a vinylidene chloride yarn, a yarn obtained by combining a vinylidene chloride yarn and a vinyl chloride yarn, a polypropylene yarn or a vinylon yarn.

Further, in the present invention, the warp yarns are arranged along the warp yarns on both side edges of the woven fabric, and the warp yarns and the warp yarns form a leno system to restrain the weft yarns and prevent the warp yarns from shifting. Is preferred.

Further, in the present invention, it is preferable that the woven fabric is integrated by a fixing body fixed across the binding portion. Further, as the fixing body, a heat-sealing tape or a hot-melt resin stuck over a binding portion of a woven fabric can be used. The fixed body is a heat-sealing yarn used for at least a part of a warp yarn, a weft yarn, a twine yarn or a binding yarn, and the heat-fusing yarn is heat-fused integrally over the binding portion of the fabric. It can also be worn.

[0020]

FIG. 1 shows an embodiment of a contact member 1 according to the present invention, in which a large number of loop-shaped branches 3 project from both sides of a tape-shaped core 2.

FIG. 2 is an enlarged view of a main part of the contact material 1. The core 2 is mainly composed of a woven fabric 4, and a tape-like fixed body is attached to the surface of the core 2. 5 is stuck.

The woven fabric 4 is composed of a warp yarn 6 and two sets of weft yarns 7a, 7
b, and the wefts 7a and 7b are woven into only one half of the woven fabric 4, respectively, are inverted at the center of the woven fabric 4, and protrude sideways from the edge of the woven fabric 4 in a loop shape. Returning to the fabric 4, the protrusions form the branches 3.

At the center of the fabric 4, the weft 7
The inverted portions of a and 7b are bound with the binding thread 8 so that the left and right fabric portions are integrated. Weft 7 in the drawing
a and 7b are bound by a binding thread 8;
A structure in which the inverted portions of a and 7b are entangled with each other and bound may be used.

As the material of the weft yarns 7a and 7b, a multifilament yarn of a relatively rigid synthetic fiber is preferably used, and a vinylidene chloride yarn, a polypropylene yarn or a vinylon yarn is suitably used. In particular, by using a yarn obtained by combining a vinylidene chloride yarn and a vinyl chloride yarn, the adhesion of microorganisms to the contact material 1 is extremely good.

The material of the warp yarn 6 is not particularly limited, and spun yarn or filament yarn of synthetic fibers can be used. In addition, since the warp yarn 6 bears the strength in the length direction of the contact material 1, it is desired that the warp yarn 6 has a large strength and does not cause a decrease in strength due to water.

In FIG. 2, the warp yarns 9 are laid along the warp yarns 6a on both side edges of the woven fabric 4, and the warp yarns 9 and the warp yarns 6a form a tangled structure, and the weft yarns 7a, 7b
Is restrained. Warp yarn 6a forming the leno structure
Preferably, the leno yarn 9 uses a non-slip yarn such as a spun yarn or a spun like long fiber yarn.

In the present invention, the weft yarns 7a and 7b protrude to the side of the woven fabric 4 as the branch portions 3, and the weft yarns 7a and 7b
Since the warp yarns a and 7b do not restrain the warp yarns 6a at the edges of the woven fabric 4, the warp yarns 6a are branched along the weft yarns 7a and 7b particularly when slippery filament yarns are used as the weft yarns 7a and 7b. There is a case where misalignment occurs by slipping toward the part 3.

As described above, the warp yarn 6a and the tangled yarn 9 form a tangled structure, thereby preventing the warp yarn 6a from slipping and preventing the warp yarn 6a from shifting to the side, thereby stabilizing the structure of the woven fabric 4. You can do it.

In the present invention, the woven fabric 4 can be woven by a double carrier type needle loom. That is, the warp yarns 6 are arranged in a folded state at the center of the fabric 4, and weft yarns 7a and 7b passed through separate needles are woven therein to weave the two halves of the fabric 4, respectively. Bind the ears 8
It binds together. After weaving, open the center of the ear where two fabric parts are bound together,
And

The fixed body 5 is fixed to one side or both sides of the woven fabric 4 over a binding section 10 in which both halves of the woven fabric 4 are bound with binding threads 8. In FIG. 2, this fixed body 5
A cloth tape or a plastic tape is used as a material, and this is overlapped with the fabric 4 and sewn or bonded to be integrated.

As the fixing member 5, a tape-shaped material made of a heat-fusible resin or hot melt is used, which is stacked on the fabric 4 and heated to be fused and integrated with the fabric 4. You can also.

The fixed body 5 is coated with a liquid resin liquid such as a rubber or plastic solution, latex, melt, paste, uncured resin liquid, etc. Can be formed by solidification.

Further, at least a part of the warp, weft, twine or binding yarn constituting the woven fabric 4 is constituted by a heat-fusing yarn, and the woven fabric 4 is woven and heated to bind the heat-fusing yarn to a binding portion. It is also possible to fuse over 10.

[0034]

As shown in FIG. 3, a large number of contact materials 1 of the present invention are vertically stretched between supporting means such as a pipe 11 installed near the water surface and near the water bottom. Install. In this state, air is blown from the bottom of the water and aerated, whereby microorganisms attached to the contact material 1 biochemically decompose contaminants in the water and purify the water.

Further, since the weft thread 7 protrudes from both sides of the core 2 to form a large number of branches 3, the contact area with water in water is large, and microorganisms adhere to the branches 3 to remove contaminants. It can be decomposed efficiently. In addition,
Although not shown in the drawings, more microorganisms can be attached to the contact material 1 by installing the contact material 1 in a twisted state.

The contact member 1 of the present invention is mainly composed of the woven fabric 4 in which the core portion 2 is composed of the warp yarn 6 and the weft yarn 7,
The warp yarn 6 extends in the length direction, can bear a large load, and has a small elongation.

In the present invention, the two wefts 7
a and 7b are respectively inverted at the center of the fabric 4 to form each half of the fabric 4, and the wefts 7a and 7b are bound by the binding thread 8 to form the integral fabric 4, so that the warp 6 Also, even when a slippery filament yarn is used as the weft yarns 7a and 7b, the weft yarn 7 does not come off the fabric 4 and the warp yarn 6 does not move.

[0038]

According to the present invention, therefore, the woven fabric 4 has a high strength and a small elongation when a load is applied, and therefore has excellent dimensional stability. Even when the core body 2 is pulled up from the center, the core body 2 is not cut or stretched, and the work can be performed safely.

As described above, the two weft threads 7a, 7b
Constitute half of the fabric 4 and are bound at the center of the fabric 4, so that when a load is applied to the branch 3, the branch 3 may come off from the core body 2 or the shape of the branch 3 may be deformed. Never do.

Further, by forming the core 2 by integrating the fabric 4 and the fixing body 5, strength in the longitudinal direction is given, and the binding portion 10 of the fabric 4 is protected by the fixing body 5. , Dimensions and shape become stable. In addition, by forming the fixing body 5 on both surfaces of the fabric 4, the weather resistance of the core portion is also improved.

As described above, since the contact material 1 of the present invention can be woven by using a double carrier type needle loom, it can be produced at high speed.
The cost is also low.

According to the second aspect of the present invention, since the weft yarn 7 is formed of a multifilament yarn, the individual filaments of the weft yarn 7 constituting the branch portion 3 are separated and spread in water, and the contact area with water is reduced. In addition, it becomes easier for microorganisms to adhere.

Further, as the weft yarn 7, a vinylidene chloride filament yarn or a combination of a vinylidene chloride filament yarn and a vinyl chloride filament yarn,
By using a polypropylene thread or a vinylon thread, the adhesion of microorganisms to the branches 3 is good, and the water purification action is further improved.

According to the fourth aspect of the present invention, the warp yarns 6a and the twine yarns 9 on both sides of the core body form a twine structure, so that the weft yarn 7 is restrained by the twine structure and the warp yarns 6 are formed side by side. Is prevented, and the texture of the fabric 4 is further stabilized.

[Brief description of the drawings]

FIG. 1 is a front view of a contact material of the present invention.

FIG. 2 is an enlarged front view showing a part of one embodiment of a contact material of the present invention.

FIG. 3 is a perspective view showing a use state of the contact material of the present invention.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Takebe 2-24-5 Senba Nishi, Minoh City, Osaka Prefecture Minoh Elegance Hills 109 F-term (Reference) 2B104 CA01 EF09 4D003 AA01 BA07 EA09 EA17 EA18 EA20 EA30 EA38

Claims (8)

[Claims] 1. A weft (7) projecting laterally from both side edges of a core (2) mainly composed of a narrow fabric (4) formed by weaving a warp (6) and a weft (7). In the contact material for water treatment (1) having the branches (3) formed therein, both halves in the width direction of the fabric (4) constituting the core (2) are separate wefts (7a, 7b) Warp yarn (6)
And weft yarns (7a, 7b) constituting each half.
Are inverted at the center of the fabric (4), and are bound to each other at the inverted portion, and the wefts (7a, 7b) protrude from side edges of the fabric (4) to form loop-shaped branches (3). Contact material for water treatment characterized by being formed 2. The contact material for water treatment according to claim 1, wherein the weft yarn (7) comprises a multifilament yarn. 3. The weft (7) is a vinylidene chloride yarn, a yarn obtained by combining a vinylidene chloride yarn and a vinyl chloride yarn,
The contact material for water treatment according to claim 1, comprising a polypropylene yarn or a vinylon yarn. 4. A warp yarn (6) on both side edges of said woven fabric (4).
A wrapping yarn (9) is arranged along a), and the wrapping yarn (9) and the warp yarn (6) form a tangling structure to restrain the weft yarn (7). One, two
Or the contact material for water treatment according to 3. 5. The binding section (1), wherein the woven fabric (4) is connected to the binding section (1).
The contact material for water treatment according to claim 1, 2, 3, or 4, wherein the contact material is integrated by a fixed body (5) fixed across the 0). 6. The fixing body (5) according to claim 5, characterized in that the fixing body (5) is a heat-sealing tape stuck over the binding portion (10) of the fabric (4). Contact material for water treatment 7. The fixing device according to claim 5, wherein the fixing body is a hot-melt resin stuck over a binding portion of the woven fabric. Contact material for water treatment 8. The heat-sealing yarn used for at least a part of the warp yarn (6), the weft yarn (7), the twine yarn (9) or the binding yarn, wherein the fixing body (5) is a heat-sealing yarn. The contact material for water treatment according to claim 5, characterized in that the yarn is heat-sealed integrally over the binding portion (10) of the woven fabric (4).