JP2009274044A - Purification belt for sewage purifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem that use of a water introducing sheet enduring even when a sponge carrier sufficiently contains water increases not only the sheet thickness and cost but also the sheet weight, which requires strengthening of a structure of a reaction tank skeleton, and increases construction cost. <P>SOLUTION: In a sewage purifier where a purification belt made by arranging and fixing a plurality of columnar bodies made of a porous material on the surface of a support hangs, and sewage is supplied from above the purification belt to be purified, the support is made of a net member. A member which consists of weft and warp threads and forms a mesh pattern having a rectangular or square shape, a member which consists of warp threads, upper right diagonal threads inclined in the upper right diagonal direction, and lower right diagonal threads inclined in the lower right diagonal direction, has cross points of the upper right diagonal threads and the lower right diagonal threads on the warp threads, and forms a mesh pattern having a triangular shape, or the like is used as the net member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention belongs to the technical field of a purification device for purifying sewage such as industrial wastewater, vertical wastewater, and river water, and more specifically relates to the structure of a purification zone used in the purification device.

Conventionally, many methods and devices have been proposed for purification methods and purification devices using microorganisms. In recent years, a purification method and a purification apparatus for purifying dirty water by hanging a purification zone in which porous triangular columnar bodies having voids to which microorganisms adhere are attached to both surfaces of a sheet in a curtain shape, and allowing sewage to flow down from the curtain. Has been developed and implemented. This is because aerobic microorganisms can easily come into contact with air and can expect a vigorous reaction, and because a blower for supplying air is not used, energy consumption is low.

As a conventional apparatus using such a purification zone, for example, there are purification apparatuses described in Patent Document 1 and Patent Document 2. These devices will be briefly described with reference to FIGS. The purification apparatus 50 shown in FIG. 8 is provided with a sewage purification unit in which a purification zone 53 is suspended below the sewage sprinkling means 54 inside the tank 52. Sewage is supplied to the sewage sprinkling means 54 by sewage supply means including a sewage supply pipe 55 and a distribution pipe 56. In addition, the treated water purified by the purification zone 53 is discharged from the treated water drain port 57. Further, air is supplied into the tank 52 by the air supply means 58. FIG. 9 is a detailed explanatory view of the purification zone 53.
Patent Gazette, Japanese Patent No. 3443725 Published patent publication, JP-A-2000-61485

The purification band 53 is disposed horizontally on both sides of the water guide sheet 61 with the sponge carriers 62, 62 formed in a triangular prism shape facing each other, and is continuously disposed with a slight gap 64 in the vertical direction. It is the structure pasted in. The water guide sheet 61 is composed of a porous structure and a water permeable sheet. The sponge carrier 62 is a biological carrier made of a porous sponge-like material and having voids to which aerobic microorganisms that purify sewage adhere. The sponge carrier 62 is provided with a gap (bending portion) 64 between the sponge carrier 62 and the sponge carrier 62 in order to expose the dripping water droplets to the air. In this apparatus, due to the above-described configuration, water droplets of sewage are dripped onto the sponge carrier 62 from the sewage sprinkling means 54, and the sewage is purified while penetrating the sponge carrier 62 and coming out from the lower side.

In the conventional apparatus described above, the water guide sheet 61 having a porous structure is used as a holding body for holding the sponge columnar body 62. In this case, if the water guide sheet is thin, due to the porous structure, the sponge columnar body 62 may be torn or cut when it contains water and becomes heavy. In addition, when a thick water conveyance sheet is used, not only the amount of material increases and the cost increases, but also the amount of water contained increases, and when the number of curtains (the number of sheets) is large, the entire apparatus becomes heavy. Therefore, it is necessary to strengthen the structure of the reaction vessel housing, and the construction cost and the accompanying transportation cost are increased. Further, when the purification zone 53 is replaced, there is a problem that the waste weight increases as the amount of the material increases, and the replacement work becomes difficult. Moreover, when enlarging an apparatus, there exists a problem that the enlargement becomes difficult for what utilized the water guide sheet.

The purification zone using a conventional sheet has the various problems described above. This invention makes it a subject to provide the purification zone which does not produce an above-described problem.

In order to solve the above problems, the present invention employs the following means. That is,
According to the first aspect of the present invention, a plurality of columnar bodies made of a porous material are arranged on the surface of the holding body, the fixed purification band is suspended, and sewage is supplied from above the purification band to purify the sewage. In the purifying apparatus, the holding body is constituted by a net member.

The invention of claim 2 is characterized in that, in the invention of claim 1, the mesh member is composed of weft and warp and the mesh pattern is rectangular.

The invention according to claim 3 is the invention according to claim 1, wherein the mesh member is composed of a warp thread, an upper right diagonal thread inclined in an upper right diagonal direction, and a lower right diagonal thread inclined in a lower right diagonal direction, and The intersection of the diagonal thread and the lower right diagonal thread is on the warp thread, and the mesh pattern is formed in a triangle.

The invention according to claim 4 is the invention according to claim 1, wherein the mesh member is composed of warp and weft, an upper right diagonal thread inclined in an upper right diagonal direction, and a lower right diagonal thread inclined in a lower right diagonal direction, and The intersection of the upper right diagonal thread and the lower right diagonal thread lies on the intersection of the warp and weft, and the mesh pattern is formed in a triangle.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the mesh member has a mesh pattern in the shape of a turtle shell.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the columnar body is fixed to the mesh member by sandwiching the mesh member from both sides and bonding the columnar bodies to each other. It is characterized by being fixed by adhesion between the columnar body and the net member.
The invention described in claim 7 is characterized in that, in the invention described in claim 6, the bonding uses a low-viscosity adhesive.

The invention according to claim 8 is characterized in that, in the invention according to claims 1 to 7, a reinforcing member for reinforcing the holding force of the columnar body is provided at a crossing portion of the mesh yarn of the mesh member. Yes.
The invention according to claim 9 is the invention according to claim 8, wherein the reinforcing member is constituted by a pair of half-cracked combined bodies and needle-like objects projecting outwardly on the surface of the combined body. And the needle-like object pierces the columnar body to reinforce the holding force.

In the present invention, the use of the net member for the holding body makes it possible to reduce the weight of the purification zone and reduce the construction cost of the entire apparatus. Moreover, since the net member is used, the effect of improving the purification efficiency can be obtained by the diffusion effect of the sewage.

FIG. 1 is an overall perspective view of a purification zone according to an embodiment of the present invention. FIG. 2 shows an exploded view of FIG. 3 and 4 show examples of the net pattern of the net member in the embodiment of the present application. FIG. 5 and FIG. 6 are diagrams illustrating a situation where sewage diffuses. FIG. 7 is an explanatory diagram of a reinforcing material that reinforces the holding force of the columnar body.

As shown in FIGS. 1 and 2, the purification band 10 has a configuration in which a holding body 11 and a series of sponge carriers 12 (12 a and 12 b) are attached to both surfaces of the holding body 11. The sponge carrier 12 uses a porous biological carrier made of a triangular columnar body in order to attach microorganisms for purifying sewage. As the porous biological carrier, for example, a water-retaining material made into a sponge shape with a material such as a nonwoven fabric or polyurethane is used.

In the present embodiment, a net member configured in a net shape is used as the holding body 11.
<Mesh yarn of mesh member>
The net member of the net member 11 used in the present embodiment is a net member formed by knitting yarns such as synthetic resin yarns and tenji yarns with yarn having affinity for water in order to promote the diffusion effect of sewage. desirable. In addition, the net member which melt | dissolved resin and formed in the net shape and the net member which stamped the resin board with the press may be used.

<Mesh pattern of mesh member>
As the mesh pattern of the mesh member 11, for example, as shown in FIGS. 3 (A), 3 (B) and 4 (C), (D), various mesh patterns are conceivable. It is done. The net yarn of the net member 11 need not be a water-permeable material having a porous structure. FIG. 3A shows a net made of warp yarns 14a and weft yarns 14b, and the mesh pattern is rectangular. FIG. 3 (B) is composed of warp yarn 15a, upper right oblique yarn (upper right oblique yarn) 15b, lower right oblique yarn (lower right oblique yarn) 15c, and upper right oblique yarn 15b. The intersection (knot) of the lower right diagonal thread 15c is on the warp thread 15a. The mesh pattern is triangular and there are no wefts. FIG. 4C has a structure in which weft yarns 16 are added to the mesh pattern of FIG. 3B, and a maximum of four yarns constitute one knot. FIG. 4D shows a mesh pattern in which a mesh thread is knitted into a turtle shell shape. The black circles in the figure indicate the knots of the mesh thread.

A low-viscosity adhesive is used to attach the sponge carrier 12 to the holder (net member) 11. As the low-viscosity adhesive, for example, a synthetic product of acrylic ester copolymer, ethyl acetate, toluene and tackifying resin is used. In the present embodiment, a triangular prism-like sponge carrier 12 is attached to the mesh member 11 with a half phase shift as shown in FIG. That is, the triangular columnar sponge carrier 12b is displaced from the triangular columnar sponge carrier 12a by a half of the distance in the vertical direction of the attachment surface, which is one surface of the triangular column. For this reason, there is no slight gap between the triangular prism-like sponge carriers so that the mesh member 11 is exposed in the vertical direction, and the triangular prism-like sponge carrier 12a and the triangular prism-like sponge carrier 12b are continuous with the mesh member 11 in between. It has become. Adhesion is performed not only on the surface of the mesh member 11 and the contact surface of the triangular columnar sponge carrier 12 but also on the contact surface of the triangular columnar sponge carrier 12a and the triangular columnar sponge carrier 12b. The sponge carrier 12a is not limited to a triangular prism shape, and the attaching method is not limited to the above method.

Further, the size of the mesh with respect to the size of the triangular pillar-shaped sponge carrier 12 is related to the thickness of the mesh, and is not necessarily uniform. Increasing the number of wefts in the mesh increases the holding power of the triangular prism-like sponge carrier 12, but increases the weight of the mesh itself and increases the cost of the mesh. Therefore, it is desirable that at least one weft of the mesh enters the bonding surface of the sponge carrier 12 having a triangular prism shape. However, the mesh size may be small and about two wefts may enter on average. For example, a mesh member having a mesh size of 4 cm in length and 10 cm in width or less is used for an object having a height of 4 cm in the vertical direction of the attachment surface of the triangular prism-like sponge carrier.

In the present embodiment, as described above, since the low-viscosity adhesive is used as the adhesive, and the mesh member 11 has irregularities such as knots, the mesh yarn of the mesh member and the sponge carrier are in close contact with each other. However, by compressing a part of the sponge carrier by the outer diameter of the mesh yarn, a slight thin gap is generated between the sponge carriers of the mesh yarn, and a water guiding effect is produced in the mesh yarn. That is, the dripped sewage diffuses while traveling along the sponge carrier 12, and the purification action is performed over the entire length of the sponge carrier 12, so that the purification efficiency is increased. FIG. 5 shows the diffusion state when the mesh pattern is rectangular, and FIG. 6 shows the diffusion state when the mesh pattern is triangular and there are diagonal threads. In the present embodiment, the sewage is spread widely so that not only the water droplets 9 falling on the suspension rod 20 but also water droplets falling directly on the sponge carrier 12 exist. In FIG. 5, the water droplets of the sewage dropped on the suspension rod 20 are transmitted to the hanging yarn 20a and transmitted to the mesh yarn 14a, and some of the water droplets are transmitted in the horizontal direction as shown in FIG. Is called. Further, some of the water droplets that have directly dropped onto the sponge carrier 12 come into contact with the mesh thread, but the remaining portion does not come into contact with the sponge carrier 12 and flows downward.

In the case of the net pattern shown in FIG. 6, diagonal net threads exist, and the effect of water droplet diffusion is greater than that in FIG. 5 due to the influence of gravity. As a result, the sewage spreads over the entire length of the sponge carrier 12 in the horizontal direction, and the purification efficiency of the purification zone 10 increases. In addition, in the mesh pattern shown in FIG. 4C, the above-described effects can be obtained, and the mesh size can be easily reduced, and the holding force of the sponge carrier 12 can be increased. In the mesh pattern shown in FIG. 4D, an average effect of the above-described effects can be obtained without increasing the weight per unit area of the mesh member.

FIG. 7 shows an example of means for reinforcing the holding force when the holding force of the holding body 11 holding the sponge carrier 12 is small. Although FIG. 7 shows a case where the mesh pattern is a rectangle, the present invention is not limited to this and can be applied to all mesh patterns. In FIG. 7, a pair of half-cracked reinforcing members 17 and 18 that can be fitted to the knots of the mesh thread with one touch are attached. The reinforcing member 17 has a main body portion 17a and a protruding fitting portion 17b, and the reinforcing member 18 has a main body portion 18a and a notched fitting portion 18b. The both parts are sandwiched from both sides of the mesh, matched to the knot of the mesh thread, and the fitting portions 17b and 18b are fitted and attached. Needle-like protrusions 17d and 18d for holding the sponge carrier 12 are provided on one or both backs of the reinforcing members 17 and 18. The reinforcing members 17 and 18 are attached before the sponge carrier is bonded to the net member. Further, the reinforcing members 17 and 18 are attached only to necessary portions.

  As described above, according to the invention of the present embodiment, since the mesh member is used as the holding body 11, the weight per unit area is light, and the mesh yarn used for the mesh member is a conventional sheet material. Therefore, the sponge carrier 12 can endure even if it sufficiently absorbs water. Therefore, the purification zone 10 becomes lighter and the entire apparatus becomes lighter, and the construction cost and the like are reduced. In addition, the sewage to be purified flows along the mesh thread in addition to flowing inside the sponge carrier 12. The sewage flowing through the mesh thread has a diffusing action, and the sewage spreads over the entire sponge carrier, improving the purification efficiency. Further, the sewage flowing through the sponge carrier 12 is in contact with air when passing through the constricted portion as in the conventional apparatus, and the purification power by aerobic microorganisms is maintained. Furthermore, since the water droplets in which the air is dissolved flow along the mesh thread, the purifying power by the aerobic microorganisms is maintained.

  The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments and examples, and the design can be changed without departing from the gist of the present invention. Is included in the technical scope of the present invention. For example, a combined body that reinforces the holding force is also included in the technical scope of the present invention when the main body portion and the needle-like protrusion are separately manufactured and used in combination.

The purification zone which implemented this invention is shown. Fig. 2 shows an exploded view of the purification zone of Fig. 1. (A), (B) The Example of the mesh pattern of a mesh member is shown. (C), (D) Another example of the mesh pattern of the mesh member is shown. The explanatory view of the diffusion action of sewage by a net member is shown. The explanatory view of the diffusion action of sewage by another net member is shown. An example of reinforcing the holding force of the holding body will be shown. The conventional apparatus using a purification zone is shown. The detail of the conventional purification zone is shown.

Explanation of symbols

10 Purification zone 11 Net member (holding body)
12 (12a, 12b) Sponge carrier (triangular columnar body)
14 (14a, 14b) Mesh yarn (warp, weft)
15 (15a, 15b, 15c) Mesh yarn (warp yarn, upper right diagonal yarn, lower right diagonal yarn)
17, 18 Reinforcement member (holding force reinforcement member)
20 Hanging rod 20a Hanging thread

Claims (9)

In a purification device for disposing a plurality of columnar bodies made of a porous material on the surface of a holding body, suspending a fixed purification band, supplying sewage from above the purification band and purifying the sewage, the holding body is A purification zone of a sewage purification apparatus, characterized by comprising a net member. The purification band of the sewage purification apparatus according to claim 1, wherein the mesh member is composed of weft and warp, and the mesh pattern is rectangular or square. The mesh member is composed of a warp thread, an upper right oblique thread inclined in the upper right oblique direction and a lower right oblique thread inclined in the lower right oblique direction, and an intersection of the upper right oblique thread and the lower right oblique thread is on the warp thread, The purification zone of the sewage purification apparatus according to claim 1, wherein the pattern is configured in a triangular shape. The mesh member is composed of warp and weft as well as an upper right inclined thread inclined in the upper right oblique direction and a lower right oblique thread inclined in the lower right oblique direction, and an intersection of the upper right oblique thread and the lower right oblique thread is the The purification band of the sewage purification apparatus according to claim 1, wherein the purification band of the sewage purification apparatus is located at the intersection of the warp and the weft and the mesh pattern is formed in a triangle. The purification band of the sewage purification apparatus according to claim 1, wherein the mesh member has a mesh pattern formed in a turtle shell shape. The columnar body is fixed to the net member by sandwiching the net member from both sides and adhering the columnar bodies to each other and by adhering the columnar body and the net member. 6. The purification zone of the sewage purification apparatus according to any one of items 5. The purification zone of the sewage purification apparatus according to claim 6, wherein a low-viscosity adhesive is used for the adhesion. The purification band of the sewage purification apparatus according to any one of claims 1 to 7, wherein a reinforcement member that reinforces the holding force of the columnar body is provided at a crossing portion of the mesh yarn of the mesh member. . The reinforcing member is composed of a pair of half-cracked combined bodies, and has a needle-like object protruding outward on the surface of the combined body, and the needle-like object penetrates the columnar body to reinforce the holding force. The purification zone of the sewage purification apparatus according to claim 8, wherein the purification zone is configured to do so.

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