JP2013154297A - Water treatment filter medium, and purification tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment filter medium easily reducing the cost required in feed and storage and expected to have higher treatment capacity by making it possible to charge a larger amount of the water treatment filter medium in a definite volume of treatment space, and a purification tank internally equipped with the water treatment filter medium.SOLUTION: A non-compressive water treatment filter medium 1 includes a passage 5 permitting the internal penetration of water and shows a space filling outer shape, and a purification tank has the water treatment filter medium 1 provided therein.

Description

  The present invention relates to an incompressible water treatment filter medium provided with a passage allowing water to enter the inside and a septic tank provided with the same water treatment filter medium in the tank.

  There exists patent document 1 shown below as prior art document information relevant to this kind of filter medium for water treatment. Since the filter medium for water treatment described in Patent Document 1 has a configuration in which a carrier such as a fiber lump is filled in a container-like holding body having a water passage hole, the whole is more than the case where the carrier is used alone. For example, when used in a fluidized bed type septic tank, the shape is large, so that even a coarse screen can prevent outflow and can easily add or recover a carrier.

  Moreover, in patent document 2 shown below as another prior art document information, in the filter medium for water treatment by patent document 1, since each water passage hole provided in the holding | maintenance body is small, a solid organic substance cannot enter easily inside. In addition, in order to improve the problem that organic matter decomposed into liquid by microorganisms is clogged and cannot flow out to the outside, the holder is made up of a large number of linear skeletons so that the porosity on the surface of the holder is increased. It has been proposed to configure.

  In the filter medium for water treatment described in Patent Document 1 and Patent Document 2, the egg-shaped or spherical holding body is symmetrical to each other so that a carrier such as compressibility can be easily accommodated inside the non-compressible holding body. It is formed by joining the upper and lower halves of the halved shape, and for this purpose, a joining protrusion is provided on one of the upper and lower halves and a joining hole is provided on the other. It is set as the provided structure.

JP-A-7-88493 (paragraph 0009, FIG. 2) Utility Model Registration No. 3149173 (0008 paragraph, FIG. 1)

  However, in the filter medium for water treatment described in Patent Document 1, since the outer shape of the filter medium for water treatment is oval or spherical, when it is stored in a packing material such as a box for transportation, adjacent water treatment Since a certain proportion of gaps are always generated between the filter media, it is difficult to sufficiently increase the filling rate and it is difficult to reduce the cost required for transportation and storage.

  Also, when used as a water treatment filter medium in a septic tank or the like, for the same reason, the amount of the water treatment filter medium that can be introduced into a fixed volume of the treatment space is limited, so that a sufficiently high treatment capacity cannot be expected. It was.

  Therefore, in view of the problems given by the conventional water treatment filter medium exemplified above, the object of the present invention is provided with a water treatment filter medium and a water treatment filter medium that can easily reduce the cost required for transportation and storage. To provide a clean septic tank.

  Another object of the present invention is to provide a larger amount of water treatment in a certain volume of treatment space when used as a water treatment filter medium in a septic tank or the like, in view of the problems given by the above-exemplified prior art water treatment filter medium. The purpose of the present invention is to provide a water treatment filter medium that can be expected to have a higher treatment capacity.

The characteristic configuration of the incompressible water treatment filter medium according to the present invention is as follows.
It has a passage that allows water to enter the interior, and the outer shape is a space-filled three-dimensional shape.

  In the water treatment filter medium having the above-described characteristic configuration, the outer shape of the water treatment filter medium is a space-filled solid, that is, a solid that can be filled with a solid of the same shape in a certain space without a gap. The quantity and mass of the water treatment filter medium that can be filled in a box or bag can be increased, and the cost required for transportation can be reduced. For the same reason, even in the septic tank or the like to which the water treatment filter medium is applied, since a larger amount of the water treatment filter medium can be applied in a fixed volume of the treatment space, a high treatment capacity can be expected.

  Another feature of the present invention is that the outer shape is generally cubic.

  This configuration is simpler and easier to mold than other space-filled solids, such as truncated octahedrons and rhomboid dodecahedrons, making it cheaper to manufacture equipment such as molds used during injection molding Manufacturing costs can be reduced.

  In the case of a truncated octahedron, rhombus dodecahedron, etc., when trying to fill a certain space with substantially no gap, the polygonal surface constituting the solid outer surface tends to be stored. The method of arranging the pallets and box-shaped packing materials so as to be aligned along the flat bottom surface cannot perform space filling without gaps, and therefore, it is difficult to operate in a space-filled state without gaps. However, if it is a cubic shape as in this configuration, even if the square surfaces constituting the outer surface are arranged along the flat bottom surface of the pallet or box-shaped packing material, the space can be filled without any gaps. Therefore, the storage state without the target gap can be made relatively easily.

  Another feature of the present invention is a container having an internal space and an opening that forms a passage to the internal space, and is porous in the internal space larger than the opening size of the opening. The compressive carrier is accommodated.

  A water treatment filter medium with a passage that allows water to enter the inside functions as a water treatment filter medium for microbial propagation, but with this configuration, a composite that contains a porous carrier in a container-like internal space Since it is a type of filter medium for water treatment, its specific surface area can be increased, more microorganisms can be propagated and retained, and more advanced water treatment is possible. In addition, the porous carrier is larger than the opening size of the opening that allows water to enter, but has a compressibility, so that when the carrier is stored in the container-like internal space, the carrier is pressed and contracted from the opening. It can be easily inserted, and when released from the compressed state after insertion, it is restored to its original size larger than the opening dimension, and the possibility of the carrier falling off is sufficiently suppressed, so that stable processing can be performed.

  Another feature of the present invention is that the internal space and the carrier are generally cubic.

With this configuration, the carrier manufacturing cost can be reduced because the shape of the carrier is simpler and easier to mold than other space-filled solids such as a truncated octahedron or rhomboid dodecahedron.
In addition, in this configuration, the internal space and the carrier are generally similar to a cubic shape, so that the gap between the internal spaces can be reduced without crushing the outer shape of the carrier by bringing the size of the carrier close to the size of the internal space. Since the ratio of the carrier to the internal space can be increased, more advanced water treatment can be achieved.

  The characteristic structure of the septic tank according to the present invention is that the filter medium for water treatment according to any one of claims 1 to 4 is provided in the tank.

  In the septic tank having the above-described characteristic configuration, since the quantity and mass of the water treatment filter medium that can be filled in a space having a constant volume with a solid outer shape can be increased, the septic tank to which the water treatment filter medium is applied Even in the inside tank, more water treatment filter media can be applied in a certain volume of treatment space, and high treatment capacity can be expected.

It is a perspective view which shows the filter medium for water treatment which concerns on this invention. It is a perspective view which shows the process in which a sponge-like carrier is accommodated in a container-like carrier. It is a perspective view which shows the metal mold | die set for a container-shaped carrier. It is a partially broken perspective view which shows the formation process of the container-shaped carrier by a metal mold set. It is a perspective view which shows the container-shaped carrier by another embodiment. It is a perspective view which shows the modification of the container-shaped support | carrier of FIG. It is a perspective view which shows another modification of the container-shaped carrier of FIG. It is a perspective view which shows the external shape of the filter medium for water treatment by another embodiment. It is a perspective view which shows the external shape of the filter medium for water treatment by another embodiment.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
FIG. 1 shows a composite water composed of a resin-made container carrier 1 (an example of a water treatment filter medium according to the present invention) and a sponge-like carrier 20 made of polyurethane or the like housed inside the container-like carrier 1. The filter material for processing is shown. In this case, the inner surface of the container-like carrier 1 and the myriad irregular channels provided on the surface and inside of the sponge-like carrier 20 can function as a carrier part for microbial propagation.

  The composite water treatment filter medium of FIG. 1 contains a sponge-like carrier 20 in a hollow portion of a container-like carrier 1 integrally formed by resin injection molding as shown in FIG. It is also possible to use only the container-like carrier 1 before storing the sponge-like carrier 20 as a non-composite water treatment filter medium. In this case, the inner surface of the container-like carrier 1 is mainly used for microbial propagation. It functions as a carrier part.

  In both cases of the composite water treatment filter medium and the non-composite water treatment filter medium, the outer shape of the filter is a cubic shape which is an example of a space-filled solid. Since the bag can be filled with a large amount of filter medium for water treatment, the cost required for transportation can be reduced, and a high treatment capacity can be expected when used in water treatment in a septic tank or the like.

(Construction of container-like carrier)
As described above, the container-like carrier 1 has a generally cubic shape as a whole, and the inner shape of the container-like carrier 1 is also generally cubic. The four side walls 4 of the cube constitute a cylindrical filter medium main body, and the separators 6A and 6B are integrated toward the radially inner side of the filter medium main body from the edges of the pair of upper and lower openings of the filter medium main body. The upper wall portion 2 and the lower wall portion 3 having a plurality of small openings 5A are formed.

  In this embodiment, a rectangular window-shaped auxiliary opening 5B is formed in each of the four side wall portions 4, thereby further facilitating the entry and exit of the liquid with respect to the hollow portion inside the container-like carrier 1. The auxiliary opening 5B of the side wall 4 is not essential.

  When using for water treatment in a septic tank or the like, the container-like carrier 1 is not easily caught in the state where the corners of the container-like carrier 1 are caught in the adjacent small openings 5A or auxiliary openings 5B. The eight corners have a rounded shape.

  The shape of the partition 6C that separates the plurality of auxiliary openings 5B provided in the side wall 4 is generally a cross shape, but the plurality of small openings 5A provided in the upper wall 2 and the lower wall 3 are separated from each other. The shape of the partitioning portions 6A and 6B for partitioning has a special shape different from a mere cross shape.

  Specifically, the separator 6A (an example of the first shield part) extending to the upper opening and the separator 6B (an example of the second shield part) extending to the lower opening are: The center of the container-like carrier 1 is arranged so as to complement each other on the projection plane along the axis X extending vertically.

  In other words, for example, the cross-shaped opening formed in a plan view formed between the partition 6B provided in the lower wall 3 and the four partitions 6A provided in the upper wall 2 is a plan view. In general, it has a substantially cross-like shape.

(Configuration of molding equipment)
Since the container-like carrier 1 has a special shape as described above, it can be molded using an injection molding apparatus having a mold set shown below.
The mold set shown in FIG. 3 includes a lower fixed mold 8 mainly for molding the lower wall portion 3 of the container-shaped carrier 1 and an upper movable mold mainly for molding the upper wall portion 2 of the container-shaped carrier 1. 9 and four side movable molds 10 for mainly molding the four side wall portions 4 of the container-like carrier 1. The four side movable molds 10 include a pair of first side movable molds 10A and 10B arranged to face each other and a pair of second side movable molds 10C and 10D arranged to face each other.

On the upper surface of the lower fixed mold 8, four first-type cores 8A having a cross-sectional shape corresponding to the shape of the four partition portions 6A to be formed on the upper wall portion 2 of the container-like carrier 1 are erected upward. Yes.
On the lower surface of the upper movable mold 9, one second-type core 9A having a cross-sectional shape corresponding to the shape of one partition portion 6B to be formed on the lower wall portion 3 of the container-like carrier 1 is erected downward. Yes.

  Each side surface of the four side movable molds 10 has a cross section corresponding to the shape of the four rectangular openings 5 to be formed in a state where the four side surfaces of the container-like carrier 1 are separated by a cross-shaped separation portion 6C. Four fourth-shaped cores 11 having a shape are erected sideways.

  Therefore, the upper end surfaces of the four cores 8A of the lower fixed mold 8 are the upper movable mold 9 so that the core 9A of the upper movable mold 9 is inserted between the four cores 8A of the lower fixed mold 8. When the upper movable mold 9 is moved close to the lower fixed mold 8 until it comes into contact with the flat lower surface, the upper movable mold 9 is moved up and down corresponding to the thickness of the separators 6A and 6B only near the lower surface of the upper movable mold 9 and the upper surface of the lower fixed mold 8. A thin gap space is obtained, and the remaining area is substantially free of gaps including the central portion.

  Next, a pair of the eight cores 11 is pressed against the two opposite sides of the cubic block obtained by the total of the five cores 8A, 9A, 9B in this way. Of the first side movable molds 10A and 10B, and a pair of second side movable molds 10C and 10C, so that a total of eight cores 11 are pressed against the other two side surfaces of the same lump. Move 10D sideways.

  In this way, in the state shown in FIG. 4, the upper movable mold 9, the first side movable molds 10A and 10B, and the second side movable molds 10C and 10D are fixed to the lower fixed mold 8, and the lower fixed mold If the molten resin is injected from the outside through the injection path 8C provided in FIG. 8 and each movable mold is removed after the resin is solidified, the container-like carrier 1 having the shape shown in FIG. 2 is obtained. What is necessary is just to select as resin applied to said injection molding from PP, PE, PVC, ABS etc., for example.

(Configuration of septic tank)
In the case where the above water treatment filter medium is applied to a septic tank, a configuration of a septic tank provided in a fixed bed or a fluidized bed inside the septic tank may be mentioned. The filter medium for water treatment may be allowed to stand in a fixed bed tank or may be fluidized together with water to be treated in a fluid bed tank. In these septic tanks, the water treatment filter medium having the incompressible container-like carrier 1 that is strong against external force and capable of breeding and holding microorganisms is provided in the tank, so that biological treatment can be performed stably in the long term. .

[Another embodiment]
<1> The container-like first carrier does not necessarily have to be a cube like the container-like carrier 1 shown in the above embodiment, and has a cylindrical shape having a hexagonal outer shape in plan view as illustrated in FIG. It is good also as a container-like carrier.
In the container-like carrier 1 illustrated in FIG. 5, three rod-like partitioning portions 6 </ b> A (an example of the first shielding body portion) are radially extended from the center of the upper wall portion 2 in the radial direction, and the lower wall portion. 3 is provided with three saddle-shaped separators 6B (an example of a second shield part) that complement the separators 6A on the projection plane along the upper and lower axis X. All side walls are formed with two or more auxiliary openings 5B.

  Here, the hexagonal cylindrical container carrier 1 in a plan view can be filled with a space-filled solid, that is, a solid of the same shape in a certain space without a gap under the condition that the direction of the axial center direction is made uniform. It is used as an example other than a solid cube.

<2> Further, the openings 5A and 5B are not necessarily formed in all of the upper and lower wall portions and the side wall portions. For example, as illustrated in FIG. 6, the side wall portions do not have the auxiliary opening portions 5B. You may implement in the form by which the small opening part 5A is formed only in the up-and-down wall part.

<3> Alternatively, as illustrated in FIG. 7, it is possible to integrally provide a fin-like protrusion 30 that protrudes toward the center on the inner surface of the container-like carrier 1. These protrusions 30 have an effect of suppressing the movement and dropout of the sponge-like carrier 20A when the sponge-like carrier 20A is housed therein. Of course, the fin-like protrusion 30 can be applied to the cubic container-like carrier 1 shown in FIGS.

<4> The water treatment filter medium according to the present invention is not necessarily in the form of a container that can store a compressible carrier therein if it is incompressible and the outer shape is a space-filled three-dimensional shape. May be implemented as a porous water treatment filter medium which is generally solid but has a large number of open pores. PP, PE, etc. are mentioned as an example of the raw material which comprises such a porous water treatment filter medium. Also in this case, it becomes possible to filter the liquid to be treated by passing the liquid to be treated through the opening pores through the filter medium for water treatment, and if necessary, microorganisms can be placed near the wall of the opening pores. By breeding, more advanced water treatment using the ability to decompose by microorganisms is possible.
In particular, in the case of this embodiment, various space filling solids represented by the truncated octahedron shown in FIG. 8 and the rhomboid dodecahedron shown in FIG. 9 can be adopted as the shape of the filter medium 1 for water treatment.

<5> In addition, by adding several corrections to the manufacturing equipment including the mold set shown in FIG. 3, the water treatment filter medium can be more efficiently manufactured by injection molding.
For example, the second side movable molds 10C and 10D are omitted from the mold set shown in FIG. 3, and at the same time, the lower fixed mold 8 and the upper movable mold 9 and the pair of first side movable molds 10A and 10B are parallel to each other. The upper and lower core groups 8A, 9A, 9B and the side core groups 11 are changed into a multi-die set in which a large number of them are arranged at equal intervals in the horizontal direction. Can do.

  By using this multi-die set, a long rectangular column-shaped precursor in a state where a large number of filter media for water treatment are connected through side walls having no openings in a single injection molding process is obtained. A large number of filter media for water treatment can be efficiently produced by cutting the precursor so that the side wall portion having no opening becomes a cut surface in the subsequent separation step. In this example, although an opening cannot be formed in a pair of side walls which are two of the six surfaces constituting the water treatment filter medium, it can sufficiently function as a water treatment filter medium.

<6> Further, in the method using the above-described multi-die set, a thin plate-like shape extending vertically on the upper and lower surfaces of the lower fixed die 8 and the upper movable die 9 along the side wall portion without the opening. If the auxiliary core is placed upright and injection molding is performed with a narrow gap extending left and right between the auxiliary cores, the water treatment filter media adjacent to each other are injected into the gap. A long precursor in the lateral direction of an apparently long rectangular column connected only by the temporary contact resin portion is obtained. Therefore, in the subsequent separation process, the temporary contact resin part is broken without applying a special cutting device, for example, by manually applying weak bending stress or tensile stress to the precursor. Can be separated into filter media.

<7> Several specific methods for mechanically and efficiently storing or filling as many water treatment filter media as possible in a fixed volume space with a small gap by utilizing the properties of a space-filled solid can be considered. . One of the storage methods is to arrange a large number of long rectangular column shaped precursors obtained by the above-mentioned multi-die set on a pallet or box-like packing material in parallel, for many water treatments. The filter medium is laid in layers, and a number of layers are stacked one above the other.

  In this embodiment, when used as a filter medium for water treatment, if necessary, the temporary contact resin portion can be manually broken immediately before being put into a septic tank or the like to obtain a separate filter medium for water treatment. Depending on the purpose of use, it is possible to use a large number of filter media for water treatment in a state where they are arranged side by side in a layered manner, and in order.

<8> As another storage method, a method using wires shown below is possible. In this method, for example, at the end of the manufacturing stage of the water treatment filter medium using the mold set shown in FIG. 3, first, the lower fixed mold 8 and the upper movable mold 9 and the pair of second side movable molds 10C and 10D. , And a predetermined pair of the water treatment filter media that are already formed and supported by the remaining pair of first side movable molds 10A and 10B from the front and back, facing each other across the central cavity. By passing a long wire or the like through the auxiliary opening 5B from the left and right and forming the next water treatment filter medium over and over again, a number of water treatment filter media are kept in a certain posture by the wire. By connecting a large number of water treatment filter media units in parallel on a pallet or box-shaped packing material, a large number of water treatment filter media units are laid in layers. Many more layers up and down It may be the state in which it is overlaid seen.

<9> As another storage method, the substantial gravity center position of the water treatment filter medium may be greatly decentered by attaching a metal piece or the like having a large specific gravity to one of the openings 5 of each water treatment filter medium. . In this case, when the entire box-shaped packing material in which a large number of water treatment filter media are put in a random posture is vibrated from the outside, the water treatment filter media tend to take a certain same posture in the packing material. It becomes easy to obtain a state of being filled naturally without a gap.

  An invention that can be used as a technique for solving the problems conventionally found in non-compressible water treatment filter media having a passage allowing water to enter the inside and having an outer shape of one type of space-filled three-dimensional shape It is.

1 Container carrier (water treatment filter medium)
5A small opening (passage)
5B Auxiliary opening (passage)

Claims (5)

  An incompressible filter medium for water treatment that has a passage that allows water to enter the inside and that has a three-dimensional outer shape.   The filter medium for water treatment according to claim 1, wherein the outer shape is generally cubic.   It has a container shape with an internal space and an opening that forms a passage to the internal space, and a porous and compressible carrier larger than the opening size of the opening is accommodated in the internal space. The filter medium for water treatment according to claim 1 or 2.   The water treatment filter medium according to claim 3, wherein the internal space and the carrier have a generally cubic shape.   A septic tank comprising the filter medium for water treatment according to any one of claims 1 to 4 in a tank.

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