JPH0763564B2 - Continuous filtration device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device suitable for purifying wastewater from pools, bathhouses and other water reservoirs and water for general industrial use, and particularly continuous filtration in which the filter material in the filter layer is not clogged with contaminants. It relates to the device.

[0002]

2. Description of the Related Art Heretofore, many types of filtration devices of this type have been known. When the filter medium filled in the filter tank of the filter device is contaminated and clogged, the filtering ability is deteriorated. Therefore, the contaminated filter medium may be replaced with a new filter medium, for example, JP-A-51-79051. Kaisho 55
As disclosed in Japanese Unexamined Patent Publication No. 4016, the filtration capacity is recovered by various methods in which backwashing is carried out to remove the substance causing the clogging.

[0003]

In the former case, a considerable number of man-hours are required for exchanging the filter medium, appropriate equipment is required depending on the frequency of exchange, and the filtration step cannot be continuously performed. It was In the latter case, there is a problem that a troublesome backwashing operation is required, the filtration process must be interrupted intermittently, and the purified water that has been filtered is reused for backwashing.

[0004]

The present invention has been made to solve the above problems, and the outline thereof is as follows. The invention of claim 1 is a sealed filtration device, which is a filtration tank filled with sand having an inlet for raw water to be treated, an overflow space for filtered water above and a treated water connected thereto. The upper element consisting of the outlet of the filter, the separation chamber provided in the center of the overflow space above the filter tank, and the sand-containing polluted water that flows from the bottom of the filter tank to the top of the filter tank through the filter layer. In a continuous filtration device consisting of a sundrift that opens into a separation pipe and a discharge pipe that is connected to the separation pipe and discharges polluted water that has separated sand by a siphon action,
(1) A lower filter layer 1b separated by an inclined plate 3 that surrounds the central portion in a triangular pyramid shape at the center via a baffle 2 below the upper filter layer 1a, and a gravel layer 5a on the lower side through a baffle 4 outside. , An inflow filtration part for the raw water to be treated having a lower element consisting of 5b on the inside and a water diversion chamber 5c for inflowing the raw water for the treatment, and (2) sand-containing polluted water at the lower center of the filtration layer, In addition, the center is connected to the upper part of the center ejector 6 connected to the pipe P3 into which the raw water to be treated flows, and is opened in the separation pipe 10 provided in the center of the overflow space of the filtered water above the upper filtration layer 1a. Sundrift 9
(3) The side ejector 11 in which the pipe P1 into which the raw water to be treated flows and the pipe P5 into which the sand-containing contaminated water flows are connected to the lower part and the upper part is connected to the side sun drift 12.
And (4) the side sun drift descending portion 14 connected to the end of the side sun drift 12 and opened in the separation tube 10.
And (5) the transverse pipe 1 of the siphon device above the separation pipe 10.
5, the transparent pipe 16 of the siphon device is connected, and the lower part of the transparent pipe 16 of the siphon device is connected to the pipe P2 into which the raw water to be treated flows, and the T-joint of the siphon device provided with the discharge port 18 of the polluted water. 17 is a continuous filtration device comprising 17 and a continuous filtration device capable of continuously performing filtration treatment of raw water to be treated and adhesion removal of contaminants in the filtration layer.
In addition to the above, the invention of claim 2 is a continuous filtration device in which a slit 20 is provided on the inner wall between the lower filtration layer 1b and the upper filtration layer 1a in the middle thereof.

[0005]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows the entire apparatus, and FIG.
Is an enlarged view of the lower part thereof. The filtration layer main body 1 is hermetically sealed as a whole, and the upper filtration layer 1a forms a main filtration layer. Usually, a fine filtration material such as sand, for example, a particle size of 1.0 m.
m, the sand having a uniform coefficient of 1.2 to 1.4 is filled. The lower part thereof is a lower filtration layer 1b which is separated by a slant plate 3 which surrounds the center part in a triangular pyramid shape through a baffle 2 which has a large number of holes, and a baffle 4 which has a large number of holes in its lower part. A gravel layer 5a is provided on the outer side, a sand layer 5b is provided on the inner side, and a water diversion chamber 5c for inflowing the raw water to be treated thereunder is provided to form a lower element 19. Treated raw water is valve V4
The water is introduced into the water diversion chamber 5c from the water conduit P4 having the above, and then flows into the gravel layer 5a through the hole of the partition wall provided between the gravel layer 5a and the water diversion chamber 5c. Next, enter the lower filtration layer 1b through the hole of the baffle 4, and further baffle 2
Most of the raw water to be treated enters into the upper filtration layer 1a through the holes of the above, and the treated water that has been filtered and cleaned during this period overflows in the upper element above the filtration layer and flows out from the treated water outlet 8. It is like this. In the lower filtration layer 1b, a part of the raw water to be treated is reversed and goes down through the inside of the filtration layer. The sand that has become dirty during the filtration of the raw water to be treated falls due to gravity,
It goes downward through the holes of the baffle 4 and the baffle 2, but further descends due to the above-mentioned inverting polluted water. An inclined plate 3 is provided on the lower filtration layer 1b below the baffle 2, and the inclined plate 3 has an annular hole in the upper part and an appropriate number of holes in the lower end. The polluted water flows downward together with the hole on the center side of the baffle 4. In this case, the sand descending with the polluted water on the surface of the inclined plate 3 further descends from the lower filtration layer 1b. That is, the descending sand slides down on the surface of the inclined plate 3 and gently contacts the raw water to be treated which is jetted upward from below, where the sand particles to which the contaminants adhere are separated independently, Contaminated water containing this is baffle 4
It flows into the center ejector 6 through the polluted sand reservoir 5b from the hole inside. The pressure of the dirty sand layer can be adjusted by the holes provided in the upper part and the lower part of the inclined plate 3.

Above the baffle 4, a slit 20 is provided in the peripheral wall up to the middle of the filtration layer 1a so that the air existing in the filtration layer is an upper space (will be an overflow space later).
It can be pushed out to the outside and removed, which allows the raw water to be treated to flow in smoothly. The slit 20 may be formed by directly processing the inner wall of the filtration layer, but may be additionally provided with a processed body having a groove made of, for example, plastic. The general size of the groove is, for example, 350 m in diameter.
m, the depth of the groove is 10 m in the case of a filtration layer having an outer circumference of 1099 mm
The air can be easily discharged and the raw water to be treated can be easily introduced by providing 8 pieces of m, a frontage of 1.0 mm, and a length of 700 mm at equal intervals. Of course, it is not limited to this size. Close to the body in the filtration layer,
A side ejector 11 is provided which is connected to the polluted sand reservoir 5b by a water conduit P5 and which is connected at the lower part to the water conduit P1 for the raw water to be treated having a valve V1. A center sundrift 9 and a side sundrift 12 are connected above the center ejector 6 and the side ejector 11, respectively, and both ejectors have a negative pressure at the center, which facilitates the inflow of sand-containing polluted water. Further, the ends of both sundrifts have a slight gap inside the separation tube 10 above the filtration tank so that the open ends are opposed to each other. That is, the center ejector 6 is attached to the center of the lower part of the filtration layer so that the sand-containing contaminated water and the raw water to be treated flow in from below, and the upper part is connected to the center sun drift 9.
A negative pressure is applied to the center of the center sundrift 9, and sand-containing polluted water is allowed to flow inside. In addition, the side ejector 11 is designed so that the sand-containing polluted water enters through the pipe P5 below the filtration layer and the raw water to be treated flows in. The side sun drift 12 is connected to the upper part of the side ejector 11, and the central part of the side ejector 11 is connected. As negative pressure,
Polluted water containing sand flows in. A mountain-shaped sun drift 13 and a descending portion 14 in the separation tube 10 are formed at the tip of the side sun drift 12, and an opening end is provided to face the upper end of the center sun drift 9 described above with a slight gap. There is. The sand-containing polluted water ejected here separates the sand downward, and the sand passes through the mesh plate at the lower end of the separation tube and is returned to the upper part of the filtration layer.

At the upper part of the separation pipe 10, a transverse pipe 15 of a siphon device is sequentially connected to a transparent pipe 16 of the siphon device. Reference numeral 17 is a T-joint of the siphon device. Here, due to the siphon action of the separation pipe 10, the contaminated water from which the sand has been separated flows out to the transparent pipe 16 of the siphon device. Here, the transparency of the transparent tube 16 of the siphon device can be used to observe the degree of contamination and adjust the flow rate. In addition,
The reason why the mountain-shaped sundrift 13 is used for the horizontal connection is that in a horizontal pipe, sand is deposited and hinders the flow.

The reason why the groove 20 is provided on the inner wall between the lower filtration layer 1b and the upper filtration layer 1a is that a large amount of air is contained in the sand gap in the filtration layer at the beginning. This air may hinder a smooth rise of water, but since this groove facilitates the removal of the air at the beginning of filtration, there is no risk of a filtration operation failure.

[0009]

Next, the means for treating the raw water to be treated by using such an apparatus will be explained. Raw water to be treated has a regulating valve V
4 through the water conduit P4, from the water diversion chamber 5c in the lower part of the filtration tank, through the gravel layer 5a, to spray from the hole of the baffle 4 to the lower filter layer 1b filled with sand, and further from the hole of the buckle 2. The treated water that has entered the upper filtration layer 1a forming the main filtration layer, and is filtered and purified during this period goes to the upper space 7 of the upper filtration tank 1a and overflows to the outside through the treated water outlet 8 as shown in the figure. To be discharged to. During this time, if there is a groove on the inner peripheral wall, the air in the filter medium is transmitted through the groove and is pushed up to the outside from the upper part by water and easily discharged. The valve V4 is opened and closed to adjust the flow rate as appropriate.

Further, although other valves are also opened, a part of water is refluxed downward in the upper filtration layer 1a and flows downward from the holes of the baffle 2 to the lower filtration layer 1b. to go into. Here, as described above, sand slides down on the surface of the inclined plate 3 that is inclined outward from the center side, gently contacts the raw water to be treated ejected from the hole of the lower baffle 4, and the ejector Therefore, it is possible to effectively feed the contaminants to the center lift 9 and the side lifts 12 while preventing them from being deposited. At this time, the center ejector 6 and the side ejector 11 generate a negative pressure in the central portion, effectively suck the polluted sand together with the water to be treated, rise in the center lift 9 and the side lift 12, and eject high pressure from the tip of the lift. By doing so, the pollutants can be easily separated from the sand, and can be easily separated and discharged by the siphon device. Further, since the upper part of the siphon device is the transparent pipe 16, the concentration of the polluted water, which is the waste water for cleaning the sand, can be visually confirmed, and the air chamber above the transparent pipe 16 adjusted by the flow rate control valve has an ice column. The amount of water can be confirmed by the thickness of the water that is flowing in a shape.
At this time, in the transparent pipe, the water level of the washing water is almost equal to the upper filtration layer 1a.
The valve V2 is adjusted so that it is suspended from the upper surface of the sand. In the above operation, when the water pressure of the raw water to be treated is large, it is not necessary to use a separate pump or the like.

[0011]

According to the present invention, since the slanting plate 3 is provided in the lower filtration layer 1b particularly in the lower portion of the upper filtration layer 1a, the polluted water accompanied by the descending sand is inclined with respect to the ascending raw water. Since it uniformly descends along the surface and easily moves downward, a constant flow occurs in the filtration tank, which prevents sediment from accumulating in the sand and effectively removes the sand-containing raw water from the center sun drift and Can be sent to Side Sundrift. Further, in the practice of the present invention, it is extremely easy to operate the amount of polluted water to about 10% with respect to the amount of wash filtered water of 90%.

At this time, the center ejector and the side ejector each generate a negative pressure in the central portion to effectively allow the sand-containing contaminated water to flow in, and in the separation pipe 10, the jetting thereof easily separates a large amount of sand and water. be able to. Further, in the upper part, the washed polluted water separated by the siphon device 15 connected to the separation pipe 10 can be flown downward at a constant speed, and the washed polluted water is effectively discharged.

Since the mountain-shaped side sun drift 13 is used, there is no fear that the water flow due to the sedimentation of sand will be obstructed, and the siphon device transparent pipe 16 confirms the dirty condition of the contaminated water therein. Since you can open and close the valve,
Work can be performed stably. Further, the groove on the inner wall of the filtration layer enables quick steady operation.

[Brief description of drawings]

FIG. 1 is a partially cut front view showing an outline of a continuous filtration device of the present invention.

[Fig. 2] Partially enlarged view of the lower part

[Explanation of symbols]

 1 Filter Tank Main Body 1a Upper Filter Tank 1b Lower Filter Layer 1c Triangular Pyramidal Chamber 2 Upper Baffle 3 Inclined Plate 4 Lower Baffle 5a Gravel Layer 5b Contaminated Sand 5c Water Divider 6 Center Ejector 7 Upper Element 8 Treated Water Drain 9 Center Sun Drift 10 Separation Tube 11 Side Ejector 12 Side Sun Drift 13 Mountain Side Sun Drift 14 Side Sun Drift Falling Part 15 Transverse Pipe for Siphon Device 16 Transparent Pipe for Siphon Device 17 T-joint for Siphon Device 18 Washing Water Drainage Port 19 Lower Element 20 slits V1 valve V2 valve V3 valve V4 valve V5 valve P1 water pipe P2 water pipe P3 water pipe P4 water pipe P5 water pipe

Claims (2)

[Claims] 1. A closed filtration device, which comprises a filtration tank filled with sand having an inlet for raw water to be treated, an overflow space for the filtered water above and a drain for the treated water connected thereto. An upper element consisting of an outlet, a separation pipe provided in the center of the overflow space above the filtration tank, and a contaminated water containing sand that flows through the filtration layer from the bottom of the filtration tank to the top of the filtration tank. In a continuous filtration device consisting of a sun drift that opens to the top and a discharge pipe that is connected to a separation pipe and discharges polluted water that has separated sand by siphon action, (1) Center the baffle 2 below the upper filtration layer 1a. Lower filtration layer 1b separated by an inclined plate 3 that surrounds the section in a triangular pyramid shape, a gravel layer 5a on the outside via a baffle 4 on the lower side, 5b on the inner side, and a water diversion that causes raw water to flow into the lower portion. With the chamber 5c,
(2) A center sun drift 9 that is connected to a pipe P3 into which raw water to be treated flows in, is connected to an upper portion of a center ejector 6 into which sand-containing polluted water flows, and is opened in a separation pipe 10 at the lower center of the filtration layer. (3) A side ejector 11 in which a pipe P1 for inflowing raw water to be treated and a pipe P5 for inflowing sand-containing contaminated water from a filtration layer are connected to a lower part, and an upper part is connected to a side sun drift 12, (4) The side sun drift descending portion 14 connected to the end of the side sun drift 12 and opened in the separation pipe 10 and (5) connected to the transparent pipe 16 of the siphon device through the traverse pipe 15 of the siphon device at the upper part of the separation pipe 10. In addition, the lower portion of the transparent pipe 16 of the siphon device is connected to the pipe P2 into which the raw water to be treated flows, and the T-joint 17 of the siphon device for discharging polluted water,
A continuous filtration device comprising: a raw water to be treated; and a continuous filtration while controlling the filtration and removal of contaminants in the filtration layer. 2. The continuous filtration device according to claim 1, wherein a groove 20 is provided on the inner wall between the lower filtration layer 1b and the upper filtration layer 1a.