JPH09155372A - Water sprinkling filter bed apparatus and washing thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the decomposition treatment capacity of a pollutant component by sufficiently bringing the whole of a filter material into contact with air. SOLUTION: Rope like filter materials 6 are arranged so as to be suspended in the air and a sewage supply means is provided above the rope like filter materials and sewage is allowed to flow down along the rope like filter materials to be filtered. Further, in a washing method of a water sprinkling filter bed apparatus having the hanging member 5 having water passing holes 51 arranged in a hollow tank 1 in a liftable manner, the rope like filter materials suspended from the hanging member, a means supplying sewage to the upper parts of the rope like filter materials through the water passing holes and a jet means injecting air into the tank and constituted so as to allow sewage to flow down along the rope like filter materials, the hanging member is allowed to fall and air is injected into the tank by the jet means in such a state that the housing vol. of the rope like filter materials in the tank is reduced in order to reduce an amt. of washing waste water to stirr and wash the rope like filter materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkling filter apparatus for purifying industrial wastewater, sewage, river water, and other wastewater and a method for cleaning the same.

[0002]

A general sprinkler filter apparatus deposits a layer of filter media in a tank in order to attach microorganisms, sprinkle sewage from the top of the tank, and permeate the treated water into the tank. It is a structure that is taken out. However, when the filter media blocks are deposited in layers in this way, only the filter media blocks at the surface layer are in sufficient contact with the air, resulting in an anaerobic state, and the capability of decomposing the pollutant components in the wastewater decreases. In addition, the microbial bodies that have proliferated cause the voids between the filter media to become clogged and become anaerobic,
The permeation of sewage deteriorates significantly.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a sprinkling filter apparatus capable of bringing the entire filter medium into sufficient contact with air to enhance the ability to decompose and decompose pollutant components. And a method for cleaning the same.

[0004]

As a means for solving the problems, the present invention comprises a cord-shaped filter medium suspended in the air and a means for supplying sewage to the upper part of the cord-shaped filter medium. Provided is a sprinkling filter apparatus, which is characterized in that it is constructed such that sewage is transmitted to the cord-shaped filter material and is made to flow down to be filtered. Further, a suspension member having a water passage hole disposed in a hollow tank, a cord-shaped filter material suspended by the suspension member, and sewage is supplied to the upper portion of the cord-shaped filter material through the water passage hole. The present invention provides a sprinkling filter apparatus, characterized in that it is configured to filter wastewater by passing it through the cord-shaped filter material and flowing it down. Further, the suspension member is arranged so as to be able to move up and down in the tank, and by raising and lowering the suspension member, the storage volume of the cord-shaped filter medium in the tank can be adjusted. It is a floor device. Further, a sprinkling filter apparatus is provided which is provided with an air supply unit for supplying air into the tank and injects air into the tank via the supply unit to wash the cord-shaped filter medium. Is. Also,
The sprinkling filter device is characterized in that a sponge is used as the cord-shaped filter material. In addition, the cord-shaped filter medium is a sprinkling filter apparatus characterized in that a plurality of filter medium units are connected in a string by a flexible wire rod to form a cord. Further, in the water sprinkling filter apparatus, the line member is fixed with a shift preventing member for the filter medium alone. Also,
A sprinkler filter apparatus is characterized in that a sponge is used as the single filter medium. Furthermore, a suspension member having a water passage hole that is vertically movable in a hollow tank, a cord-shaped filter material suspended by this suspension member, and an upper portion of the cord-shaped filter material through the water passage hole. A method of cleaning a sprinkling filter apparatus, comprising means for supplying sewage and means for injecting air into the tank, wherein the sewage is transmitted to the cord-shaped filter medium to be flowed down for filtering. The suspension member is lowered to reduce the amount of washing and draining water, and in a state where the storage volume of the cord-shaped filter medium in the tank is reduced, air is jetted into the tank by the jetting means to stir the cord-shaped filter medium. A method for cleaning a sprinkling filter apparatus, which is characterized by cleaning.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

<B> Tank As shown in FIG. 1, the tank 1 is formed by forming a hollow box on a frame 11. Specifically, the top plate 12 is formed to be openable and closable so that the cord-shaped filter medium group can be pulled up and removed together with the hanging member. Further, two or more vertical guide rails 14 are attached to the inner peripheral surface of the side plate 13 at equal intervals in the circumferential direction. The guide rail 14 is made of, for example, a steel material having a U-shaped cross section, and the back surface thereof is joined to the inner peripheral surface of the side plate 13.

The bottom plate of the tank 1 is a perforated bottom plate 15, and a water collecting gutter 16 for treating water for dropping the holes is formed in the lower part of the bottom plate 15. The water collecting trough 16 is further communicated with the drain pipe 17, and the treated water and the like are discharged to the outside of the tank 1 through the drain pipe 17. An air supply pipe 18 capable of supplying and injecting air into the tank 1 is connected to the lower portion of the side plate 13 and the like. Further, a normally open exhaust pipe 19 for exhausting the air in the tank 1 is connected to the upper portion of the side plate 13 and the like. In addition, it is desirable that the inner surface of the tank 1 and other members inside the tank 1 are processed with stainless steel in order to prevent corrosion.

<B> Sprinkling member As the sprinkling member 2, a saucer-shaped member or the like having a sprinkling hole 21 on the bottom surface is used. The water sprinkling member 2 is horizontally arranged in the upper part of the tank 1 and has a rotating shaft 3 penetrating the center thereof.
It is fixed to and is configured to be rotatable.

A screw rod steel is used for the rotary shaft 3, and is vertically arranged at the center of the tank 1, and its upper end is a top plate 12.
It is connected to the motor 31 installed above, and the lower end has a perforated bottom plate 15
It is received by a bearing 32 attached above. Also,
The clutch 3 is provided between the sprinkling member 2 and the suspension member of the rotating shaft 3.
3 is provided so that they can be connected and disconnected.

As a method of supplying sewage into the water sprinkling member 2, it is carried out through the water supply hole 41 of the water intake pipe 4 introduced in the upper part of the tank 1. In addition, as a sprinkling member,
In addition to the saucer-shaped member as described above, various structures such as a structure for swirling a pipe body having water spray holes and a shower-shaped non-rotating structure having a large number of holes can be adopted.

<C> Suspending Member As the suspending member 5, a saucer-like member having a water passage hole 51 on the bottom surface is used. The suspension member 5 is horizontally arranged immediately below the water sprinkling member 2 in the upper portion of the tank 1, and has a threaded portion 52 that is screwed with the rotating shaft 3 at the center thereof. The screwing portion 52 is, for example, one in which a screw is formed on the inner surface of a cylindrical body formed orthogonal to the bottom plate.

Further, on the outer surface of the side surface of the hanging member 5, there is provided a fitting portion 53 which is fitted in the above-mentioned guide rail 14 and is slidable in the vertical direction. As a result, when the rotating shaft 3 is rotated while the clutch 33 is connected, the suspension of the suspension member 5 is stopped, so that the guide rail 14
You can raise and lower along.

Various other structures can be adopted for the lifting device for the suspension member 5. In addition to the saucer-shaped member as described above, the hanging member may employ various structures having water passage holes such as a mesh plate-shaped member. Furthermore, the hanging member
It is possible to raise and lower and rotate so that the efficiency of contact between the suspended cord-shaped filter medium and air can be increased.

<D> Cord-shaped filter medium The cord-shaped filter medium 6 is formed by connecting a plurality of filter medium units 61 with a flexible wire rod 62 in a bead shape. As the wire rod 62, a flexible one having a certain degree of strength such as Tegsu or water thread is used. For the filter medium simple substance 61, a porous biological carrier or the like having an attachment space for microorganisms is used. Polyurethane sponge or the like is used as the material.

When using a sponge, a soft sponge having excellent water retention is desirable. When depositing a sponge filter medium in a layered manner as in the prior art, it was inconvenient because a soft one was crushed to cause an anaerobic state. Became possible.

The shape of the single filter medium 61 is spherical, cubic, or the shape in which the bottom surfaces of two triangular pyramids are combined (substantially abacus spherical), or the single filter medium 61 itself is a linear or spiral string. It may be formed, and various shapes are conceivable. When a cubic filter medium alone is used, the filtration efficiency is increased by passing the wire rod in the diagonal direction.

Further, the wire rod 62 is appropriately spaced,
The shift preventing member 63 of the filter medium unit 61 is fixed. It is conceivable that the shift preventing member 63 is formed, for example, by applying a hot-melt adhesive or the like to the wire 62. In addition, wire rod 6
When a knot is formed on 2 to form a slip prevention member,
Various members such as a grip member for gripping and fixing the wire rod 62 can be adopted.

The total length of the cord-shaped filter medium 6 is made in consideration of the weight of attached microorganisms and the like, and the height of the tank 1 is adjusted so that the lower end of the cord-shaped filter medium 6 is suspended when the cord-shaped filter medium 6 is suspended. The perforated bottom plate 15 is configured so as not to stick to it. When hanging
A weight 64 is attached to the lower end portion, and the weight 64 is hung so as to be located immediately below the water passage hole 51 of the hanging member 5. As a suspending method, for example, a method in which a thin pin or the like is installed in the water passage hole 51 and the upper end of the wire rod 62 is bound to it may be considered.

[0019]

[Usage Method] Next, a usage method of the apparatus configured as described above will be described. First, when treating sewage, as shown in FIG. 1, sewage taken in from the intake pipe 4 is supplied into the water sprinkling member 2 through the water supply hole 41. The water sprinkling member 2 is rotating with the clutch 33 disengaged by the driving of the motor 31, and the sewage is evenly sprinkled into the suspension member 5 through the water sprinkling holes 21.

The sewage dropped on the suspension member 5 is further dropped on the cord-shaped filter medium 6 group through the water passage holes 51 and, while flowing down along the cord-shaped filter medium 6 group, is decomposed by adherent microorganisms. At the same time, the suspended solids (SS) are captured. The treated water permeates the perforated bottom plate 15, and then the water collecting trough 16 and the drain pipe 1.
Water is sent to the outside of the tank 1 via 7. During the treatment process, the air supply pipe 18 and the exhaust pipe 19 are opened, and fresh air is constantly flown into the tank 1 to promote the decomposition treatment capacity of sewage. In this case, the air supply pipe 18 may be simply opened or forcibly supplied.

Next, a method of cleaning the cord-shaped filter material 6 will be described. First, with the clutch 33 connected, the motor 31
Is driven to rotate the entire rotary shaft 3. Then, as shown in FIG. 2, the suspension member 5 is lowered to a predetermined position to reduce the storage volume of the cord-shaped filter medium 6 in the tank 1. In this state, dirty water is stored in the tank 1 up to near the bottom surface of the hanging member 5, and with the drain pipe 17 closed, air is jetted from the air supply pipe 18 into the tank 1 to stir and wash the cord-shaped filter medium 6 group. To do. After the cleaning is completed, the waste water is drained from the drain pipe 17.

By reducing the storage volume of the cord-shaped filter material 6 in the tank 1 in this manner, the amount of highly concentrated cleaning waste water generated by cleaning can be minimized. In addition, it is also possible to kill and remove the filter bed fly by prolonging the immersion time of the cord-shaped filter medium 6 group in water at the time of washing.

After washing, as shown in FIG. 3, the hanging member 5 is further lowered, and the group of cord-like filter media 6 is sandwiched between the perforated bottom plate 15 and compressed. Thereby, the microorganisms excessively attached to the cord-shaped filter medium 6 group can be removed and anaerobicization can be prevented. By cleaning and compressing the cord-shaped filter medium 6 group as described above, the biological treatment capacity and the suspended solid (SS) trapping capacity can be recovered.

When the sprinkler filter apparatus of the present invention is used for large-scale sewage treatment, there is a limit to enlarging the cord-shaped filter material itself. It becomes possible to adapt by the combination structure.

[0025]

Since the present invention has been described above,
The following effects can be obtained. <B> Since the filthy water is treated biologically and the suspended solids (SS) are captured while the cord-shaped filter medium is suspended in the air, the entire filter medium can be sufficiently brought into contact with air, and the decomposition treatment capability of pollutant components can be improved. You can

<B> Since the filter medium is used by suspending it in the form of a cord instead of depositing it as a layer as in the conventional case, the filter medium is not crushed. Therefore, a material such as a soft sponge, which has a high water retention capacity and is suitable as a filter medium, can be used as the filter medium alone.

<C> When the suspending member for the cord-shaped filter material can be moved up and down, the cord-shaped filter material can be washed while the volume of the cord-shaped filter material stored in the tank is small.
Therefore, it is possible to minimize the amount of high-concentration cleaning wastewater generated by cleaning.

<D> When replacing the filter media, the cord-like filter media group can be replaced together with the suspension member, so that maintenance is facilitated in a unit system. Further, since it is possible to easily partially replace each cord-shaped filter medium, maintenance performance is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an explanatory view showing a method for cleaning a cord-shaped filter medium.

FIG. 3 is an explanatory view showing a compressed state of a cord-shaped filter medium.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Lalit Kumar Agrawal 1-16-14, Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Hideki Harada 1 School Town, Nagaoka City, Niigata Prefecture -4-28 Nagaoka Housing 2-204

Claims (9)

[Claims] 1. A cord-shaped filter medium suspended in the air, and a means for supplying sewage to the upper part of the cord-shaped filter medium, the sewage being transmitted to the cord-shaped filter medium and flowing down. A sprinkling filter apparatus, characterized in that it is configured to filter. 2. A suspension member having a water passage hole disposed in a hollow tank, a cord-shaped filter material suspended by the suspension member, and an upper portion of the cord-shaped filter material through the water passage hole. A sprinkling filter apparatus comprising: means for supplying sewage, wherein the sewage is transmitted to the cord-shaped filter medium to flow down to be filtered. 3. The sprinkling filter apparatus according to claim 2, wherein the suspension member is arranged in a tank so as to be able to move up and down.
A sprinkling filter apparatus, wherein the hanging volume of the cord-shaped filter material in the tank can be adjusted by raising and lowering the suspension member. 4. The sprinkling filter apparatus according to claim 2 or 3, wherein air supply means for supplying air into the tank is provided, and air is injected into the tank through the supply means to obtain the cord-like filter material. A sprinkling filter device, characterized in that it is configured so that it can be washed. 5. The sprinkling filter apparatus according to any one of claims 1 to 4, wherein a sponge is used as the cord-shaped filter material. 6. The sprinkling filter apparatus according to any one of claims 1 to 4, wherein the cord-shaped filter medium is formed by connecting a plurality of filter medium units with flexible wire rods in a cord shape. , Water sprinkling filter equipment. 7. The sprinkling filter apparatus according to claim 6, wherein the wire member is fixed to a shift-preventing member for the filter element alone. 8. The sprinkling filter apparatus according to claim 6 or 7, wherein a sponge is used as the single filter medium. 9. A suspension member having a water passage hole that is vertically movable in a hollow tank, a cord-shaped filter material suspended by the suspension member, and the water passage hole above the cord-shaped filter material. And a means for supplying air into the tank, and a method for cleaning a sprinkling filter apparatus configured to filter waste water by passing it through the cord-shaped filter medium and flowing it down. In the state where the hanging member is lowered and the storage volume of the cord-shaped filter material in the tank is reduced in order to reduce the amount of cleaning and drainage, air is jetted into the tank by the jetting means to obtain the cord-shaped filter material. A method for cleaning a sprinkling filter apparatus, which comprises: