JPS6141243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter device having a filter medium cleaning mechanism.

Conventionally, as this type of filtration device, there have been devices that clean the filter medium by jetting cleaning water onto the surface of the filter layer,
A device that cleans the filter media by stirring the filter media with a stirring device,
There are devices that clean filter media by jetting air or cleaning water into the filter layer.

However, in conventional filtration devices, the cleaning of the filter media is still insufficient, and the cleaning mechanism only functions to clean the filter media and not to filter raw water, making the device complex and large. There is a drawback that it becomes

In addition, the filtration action of raw water is performed only on one side of the filter layer, and the filter layer is not utilized effectively, so there is a drawback that the filtration ability is not excellent.

Therefore, the present invention provides a filtration device that eliminates the drawbacks of conventional filtration devices, that is, the filter medium can be sufficiently washed, and the device can be simplified and miniaturized by being used both as a washing mechanism and a filtration mechanism. is possible,
Moreover, the present invention is proposed for the purpose of a filtration device capable of improving filtration performance, and a filter layer 1 made of granular filter media and a space 2 are formed vertically inside the filter layer 1. A rotating drum 5 in which an outer peripheral wall 3 in contact with the outer peripheral wall 4 in contact with the space 2 is formed to allow water to pass therethrough.
A water tank 6 in which the rotating drum 5 is rotatably horizontally installed, and a first water flow section 7 for raw water inflow and sewage outflow that penetrates the rotation axis of the rotary drum 5 from outside the water tank 6. A first flow pipe 8 for raw water inflow and sewage outflow is located in the section 2, and a second flow pipe 9 for filtrate inflow and wash water outflow passes through the rotation axis of the rotating drum 5 from outside the water tank 6. This filtration device is composed of a second flow pipe 10 for filtrate inflow and wash water outflow, which is located within the filter layer 1.

As shown in the illustrated example, the filter layer 1 of the filtration device according to the present invention is formed of ordinary granular filter media such as filter sand that is deposited on the lower side of the rotary drum 5 to form a layer, or is formed of ordinary granular filter media such as filter sand that floats in the water. It may also be formed of floating granular filter media that forms layers.

When the filter layer 1 is formed of such a floating granular filter medium, unlike the illustrated example, a space 2 is formed on the lower side of the rotary drum 5, and a first water flow section 7 is formed in the space 2 on the lower side. Further, a filter layer 1 is formed on the upper side of the rotary drum 5, and a second water flow section 9 is located in the filter layer 1 on the upper side.

Moreover, the rotating drum 5 of the filtration device according to the present invention
The body portion is not limited to an inverted cylindrical shape as shown in the illustrated example, but may be an inverted cylindrical shape. When the rotary drum 5 is formed into an oblique cylindrical shape, there is an advantage that the granular filter medium moves rapidly when the rotary drum 5 rotates, increasing the cleaning effect of the filter medium.

On the premise of the above, a first embodiment of the filtration device according to the present invention will be described below with reference to FIGS. 1 and 2.

Almost the entire body wall of the rotating drum 5 is formed of a net 11 which also functions as a filter for raw water, so that the outer peripheral walls 3 and 4 are formed to allow water to pass therethrough. The rotary drum 5 rotates freely around a part of the second water pipe 10 which is fixed so as not to rotate during rotation, and a part of the rotary handle 12 which is fixed to the rotary drum 5. It is placed horizontally inside. Also, the first
The water flow pipe 8 passes through a part of the second water flow pipe 10, and the first water flow part 7 is located above the space part 2,
Like the second water pipe 10, it is fixed so as not to rotate when the rotating drum 5 rotates.

Further, in the second water flow section 9 of the second water flow pipe 10, a portion 14 where the second water flow port 13 is provided is covered with a filter net 15, and slides into contact with the inner surface of the filter net 15 during filter medium cleaning. Sliding member 1
6 is formed between the filter net 15 and the portion 14. The sliding contact member 16 is the portion 1
It is formed by a spiral wire member wound around 4.

Next, the symbols in the figure will be explained.

In the figure, reference numeral 17 denotes a stirring member provided on the inner circumferential surface of the rotating drum 5, which assists the movement of the granular filter medium when the rotating drum 5 rotates.

In the figure, 18 is an overflow port provided above the water tank 6, 19 is a first wastewater discharge port provided below the overflow port 18, and 20 is a second wastewater discharge port provided below the water tank 6. It is the exit.

Further, in the figure, 21 is a first water pipe connected to the first water pipe 8, 22 is a second water pipe connected to the first water pipe 8, and 23 is connected to the second water pipe 10. A third water pipe, 24 a fourth water pipe connected to the second water pipe 10, 25 a fifth water pipe connecting the overflow port 18 and the third water pipe 23, 2
Reference numeral 6 denotes a sixth water pipe that connects the first wastewater discharge port 19 and the second water pipe 22. The first water pipe 21 includes a pump 27 that continuously supplies raw water into the rotating drum 5, a first valve 31, and a second water pipe 21.
2 has a second valve 32, and a third water pipe 23 has a third valve 32.
A fourth valve 3 is installed in the valve 33 and a fourth water pipe 24.
4. The sixth water pipe 26 is provided with a sixth valve 36.

Next, the filtration action and cleaning action of the filtration device shown in FIGS. 1 and 2 will be explained.

During filtration, the first valve 31 and the third valve 33 are opened, the second valve 32, the fourth valve 34, and the sixth valve 36 are closed, and the pump 27 is operated. The raw water flows from the first water pipe 21 to the first water pipe 8 to the first water flow part 7 to the space 2 in the rotating drum 5 as shown by the solid arrow in FIG. The raw water that has reached this space 2 is divided into two directions. The raw water in one direction is filtered and discharged through the surface of the filter layer 1 → the filter layer 1 → the second water flow part 9 → the second water flow pipe 10 → the third water pipe 23.
The raw water in the other direction is from the outer circumferential wall 4 which is formed to allow water to flow through and is in contact with the space 2 → inside the water tank 6 → the outer circumferential wall 3 which is formed to allow water to flow and is in contact with the filter layer 1 It is filtered and discharged through → filter layer 1 → second water flow section 9 → second water flow pipe 10 → third water pipe 23.
In the filter layer 1, not only the filter layer portion on the surface side of the filter layer 1 but also the filter layer portion on the outer peripheral wall portion 3 side that is formed to allow water to pass through functions to filter raw water, so that the filter layer can be used effectively. It is possible to improve the filtration ability.

Further, the filtration device in the embodiment has the advantage that the raw water is also filtered by the net body 11 and the filter net 15 of the second water flow section 9. In addition, since an overflow port 18 connected to the third water pipe 23 is provided in the water tank 6, if the filter layer 1 is severely clogged and the raw water in the water tank 6 rises to the overflow port 18, Even if there is a problem, it will not interfere with the circulation of raw water.

In addition, the supply of raw water to the filtration device shown in the illustrated example is from the first
Although this is done by only supplying water from the water flow section 7, a raw water port may be provided in the tank 6 to directly supply raw water into the tank 6 in conjunction with this.

Next, the cleaning action will be explained.

During the cleaning operation, the second valve 32 and the fourth valve
The valve 34 and the sixth valve 36 are opened, the first valve 31 and the third valve 33 are closed, and the cleaning water is supplied to the fourth valve.
Water is continuously supplied from the water pipe 24. Further, the rotating drum 5 is rotated by operating the rotating handle 12. With this rotation, the granular filter medium in the filter layer 1 becomes
The adhering suspended solids are dissociated by moving as shown by solid line arrows in the figure and rubbing the granular filter media against each other, and the dissociated adhered suspended solids are discharged by the outflow of washing water as described below. In the case where the filter layer 1 is formed of filter sand, the surface of the filter layer 1 is inclined at an angle of 30 degrees, which is the angle of repose of sand, and the granular filter medium is moved by continuously collapsing.

On the other hand, the previous washing water flows from the fourth water pipe 24 to the second water pipe 10 to the second water flow part 9 as shown by the dotted line arrow in FIG. A part of the washing water that has reached the second water flow section 9 flows out from the second water flow port 13 and becomes an upward flow to wash the inside of the filter layer 1, and then from the space section 2 to the first water flow section 7. →The first water pipe 8→The water is discharged through the second water pipe 22. Also, a part of the washing water that has reached the second water flow section 9 flows out from the second water flow port 13 and becomes a downward flow to wash the inside of the filter layer 1, allowing water to flow when it comes into contact with the filter layer 1. The waste water is discharged through the outer peripheral walls 3 and 4 → the inside of the water tank 6 → the first sewage discharge port 19 → the sixth water pipe 26 → the second water pipe 22. Further, a part of the cleaning water that has reached the space 2 is transferred to the outer circumferential walls 3, 4 through which water can pass when in contact with the space 2 → inside the water tank 6 → the first sewage outlet 19 → the sixth sewage outlet. It is discharged via the water pipe 26 → second water pipe 22.

As described above, the cleaning action of this filtration device is achieved by the movement of the granular filter medium with the rotation of the rotary drum 5 and the outflow of the cleaning water in two directions from the second water flow section 9 within the filter layer 1. Cleaning is performed properly.

In addition, during this washing, the granular filter medium and the filter net 15 are rubbed together due to the flow of the granular filter medium and the accompanying movement of the filter net 15 in the second flowing water section 9, and the turbidity, etc. on the outer surface of the filter net 15 is removed. The deposits are dissociated and removed.

In addition, as the filter net 15 vibrates, the filter net 15 and the sliding member 16 are rubbed against each other at the same time, and the deposits on the inner surface of the filter net 15 are also dissociated and removed.

Next, a second embodiment of the present invention will be described with reference to FIG. 3, and the same points as those in the first embodiment will be designated by the same reference numerals and the explanation thereof will be omitted.

First water pipe 8 and second water pipe 10 of the first embodiment
The first water pipe 8 and the second water pipe 10 of the second embodiment penetrate the water tank 6 and the rotating drum 5 from opposite sides in different directions. It is penetrating. In the illustrated example, a portion of the first water pipe 8 and second water pipe 10 extending on the rotational axis of the rotating drum 5 is formed of the same pipe body, and is partitioned in the middle by a partition member 41. A first water pipe 8 and a second water pipe 10 are constituted by this.

Further, the rotation operation means for the rotating drum 5 is performed by the driving means of the motor 42. The driving force of the motor 42 is applied to a first motor provided around the outer periphery of the rotating drum 5.
The power is transmitted to the rotating drum 5 via the gear 43 and a second gear 45 provided on the distal end side of the drive shaft 44 .

This second embodiment does not differ from the first embodiment except for the configuration described above.

Further, since the filtration action and the cleaning action are fundamentally the same, their explanation will also be omitted.

The filtration device according to the present invention is configured as described above, and when raw water is filtered, the raw water flows through the first water pipe 8.
→First water flow section 7→Space section 2→Surface of filter layer 1→Filter layer 1
The water is filtered and discharged to the outside of the water tank 6 via the second water flow section 9 and the second water flow pipe 10. Also, a part of the raw water that has reached the space 2 via the first water pipe 8 → the first water flow part 7 is transferred from the water-permeable outer peripheral wall 4 in contact with the space 2 to the water tank 6.
Inside→Water-permeable outer peripheral wall portion 3 in contact with filter layer 1→
Filter layer 1 surface in contact with the outer peripheral wall 3 → Filter layer 1 →
The water is filtered and discharged to the outside of the water tank 6 via the second water flow section 9 → second water flow pipe 10. Therefore, according to the filtration device according to the present invention, the filtration action of raw water is performed by filtration through the first route from the surface side of the filter layer 1 through the filter layer 1 to the second water flow pipe 9, and by contacting the outer peripheral wall portion 3. Since filtration is performed by the second route from the side of the filter layer 1 passing through the filter layer 1 to the second flowing water section 9, the filter layer 1 can be used effectively and the filtration capacity can be improved. can.

In addition, when cleaning the filter layer 1, the rotating drum 5
is rotated so that cleaning water flows into the rotating drum 5 from the second water pipe 10.

The granular filter media of the filter layer 1 are moved by the rotation of the rotating drum 5, and the adhering suspended solids are dissociated by rubbing the granular filter media against each other. On the other hand, the washing water flows from the second water pipe 10 to the second water flow section 9. And the second
A part of the washing water that has reached the flowing water section 9 flows out from the second flowing water section 9 to the surface side of the filter layer 1, thereby washing the filter layer 1, and then flows from the space 2 to the first flowing water section 7 to the first flowing water. It is discharged to the outside of the water tank 6 through a pipe 8.

In addition, a part of the washing water that has reached the second water flow part 9 flows out from the second water flow part 9 to the water-permeable outer peripheral wall parts 3 and 4 when it comes into contact with the filter layer 1. After cleaning the water tank 1, the water flows through the outer peripheral walls 3 and 4 into the water tank 6. Although it is preferable that the cleaning water in the water tank 6 is discharged to the outside of the water tank 6 during or after washing, the means for doing so is arbitrary.

As described above, the cleaning of the filter device according to the present invention involves the movement of the granular filter medium as the rotary drum 5 rotates, and the cleaning of the filter device according to the present invention.
Washing water flows out of the filter layer 1 from the water flow section 7 toward the space 2, and wash water flows out of the filter layer 1 from the first flow section 7 toward the outer peripheral walls 3 and 4 when in contact with the filter layer 1. This is done completely by three types of cleaning water.

Moreover, the configuration of the filtration device according to the present invention is the first one.
The first water pipe 8 of the water flow section 7 serves both as an inflow of raw water and an outflow of waste water, and a second water flow section 9 and a second water flow pipe 10 serve as an inflow of filtered raw water (filtrate) and an outflow of washing water. Since the rotary drum 5 also serves as the base member, the inside of the rotary drum 5 can be simplified and the rotary drum 5 can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the filtration device according to the first embodiment, FIG. 2 is a sectional view taken along the line X-X in FIG. 1 during cleaning, and FIG. 3 is a sectional view of the filtration device according to the second embodiment. FIG. Main symbols in the diagram...1: filter layer, 2: space,
3, 4: outer peripheral wall, 5: rotating drum, 6: water tank,
7: first water flow part, 8: first water flow pipe, 9: second water flow part, 10: second water flow pipe.

Claims (1)

[Claims] 1. A filter layer 1 made of granular filter media and a space 2 are formed vertically inside the filter, and are in contact with an outer peripheral wall 3 that is in contact with the filter layer 1 and the space 2. A rotating drum 5 having an outer circumferential wall 4 formed to allow water to flow through it, a water tank 6 in which the rotating drum 5 is horizontally installed so as to be freely rotatable, and a rotation axis of the rotating drum 5 that can be accessed from the outside of the water tank 6. A first flow pipe 8 for raw water inflow and wastewater outflow, which penetrates through the space part and has a first flow part 7 for raw water inflow and wastewater outflow located in the space 2, and a rotation axis center of the rotating drum 5 from outside the water tank 6. A second water flow section 9 for filtrate inflow and washing water outflow passes through the filter layer 1.
A filtration device comprising a second flow pipe 10 for filtrate inflow and wash water outflow located inside the filter. 2. The filtration device according to claim 1, wherein the filter layer 1 is formed of floating granular filter media floating in water to form a layer. 3. The filtration device according to claim 1 or 2, wherein the body is a rotating drum 5 having an inverted cylindrical shape.