JPS6141245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filtration device having two raw water chambers.

Conventionally, filtration devices have filtered raw water only on one side of the filtration layer, which has the disadvantage that the filtration layer is not effectively utilized and the filtration ability cannot be improved.

Therefore, this invention proposes a filtration device that can effectively utilize the filter layer and improve the filtration capacity by forming two raw water chambers, and the inside of the filter tank 1 is 2 and an outer part 3, and a filter layer 5 and a first filter layer formed in the vertical direction of the inner part 2 in the filter tank 1 and in contact with the partition wall 4, respectively. It is composed of a raw water chamber 6, a filtrate collection section 7 located within the filter layer 5, and a raw water supply section 8 that directly supplies raw water into the first raw water chamber 6, and is connected to the filter layer 5. The part of the partition wall 4 in contact with the first raw water chamber 6 is formed in a water-permeable part 9, and the part of the partition wall 4 in contact with the first raw water chamber 6
is formed on the filter wall 10, so that the outer part 3 in the filter tank 1 serves as a second raw water chamber 11.

Note that the filter layer 5 of the filter device according to the present invention may be formed below the inner part 2 in the filter tank 1 by depositing ordinary granular filter media such as filter sand as shown in the illustrated example. Inner part 2 in filter tank 1 due to floating granular filter media etc.
It may be formed on the upper side.

A first embodiment of the filtration device according to the present invention will be described below with reference to FIGS. 1 and 2.

The partition wall 4 is formed by an outer wall 13 forming a horizontal rotating drum 12, and the outer wall 13 partitions the inside of the filter tank 1 into an inner part 2 and an outer part 3. The cylindrical or rectangular body wall of the rotating drum 12 (the cylindrical body wall in the illustrated example) is formed by the net 14, so that the portion in contact with the filter layer 5 is partitioned. Most of the wall 4 is formed to allow water to pass therethrough, and most of the partition wall 4 in the portion that is in contact with the first raw water chamber 6 is formed as a filter wall 10.

Further, the raw water supply section 8 passes through the rotation shaft center of the rotary drum 12 from the outside of the filter tank 1 to the rotary drum 12.
It is formed on the tip side of the first water pipe 15 leading to the inside. The sewage collection section 7 is formed on the tip side of a second water flow pipe 16 that extends from outside the filter tank 1 through the rotation axis of the rotary drum 12 and reaches inside the rotary drum 12.
And those first water pipe 15 and second water pipe 1
6 is fixed so as not to rotate when the rotary drum 12 rotates, and the rotary drum 12 rotates with a part of the first water flow pipe 15 and the second water flow pipe 16 extending on the rotational axis as fixed axes. It is rotatably provided in the filter tank 1. Further, the rotating drum 12 is rotated by a rotating operation means of a handle 17 fixed to the rotation axis.

The raw water supply section 8 and the first water pipe 15 do not only function to supply raw water, but also function to drain sewage washing water when cleaning filter media, and
The filtrate collecting section 7 and the second water flow pipe 16 function not only to collect filtrate, but also to flow out washing water when washing the filter medium.

In addition, the filtered water collection section 7 of the second water flow pipe 16 covers a portion 19 where the second water flow port 18 is provided with a filter mesh 20, and also has a sliding surface that slides into contact with the inner surface of the filter mesh 20 when cleaning the filter medium. A contact member 21 is formed between the filter net 20 and the portion 19. The sliding member 21 is formed of a spiral linear member wound around the portion 19.

Further, an overflow port 22 and a first sewage washing water outlet 23 are provided above the filter tank 1, and a second wastewater washing water outlet 23 is provided below.
A sewage outlet 24 is provided.

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

Raw water is made to continuously flow into the rotating drum 12 from the first water pipe 15 by operating a pump (not shown) or the like.

The raw water passes through the first water pipe 15 → the raw water supply section 8 and reaches the first raw water chamber 6 as shown by the solid arrow in FIG. A part of the raw water that has reached the first raw water chamber 6 enters the filter layer 5 from the surface of the filter layer 5 and is filtered, and then passes through the filter network 20 of the filtered water collection section 7 and is filtered. After that, the filtrate is filtered and discharged via the filtrate collecting section 7 → the second water pipe 16. Further, a part of the raw water that has reached the first raw water chamber 6 is removed from the filter wall 10.
The raw water passes through the filter tank 1, is filtered, and enters the outer part 3 of the filter tank 1, that is, the second raw water chamber 11. Then, the water enters the filter layer 5 through the water-permeable portion 9 of the partition wall 4 that is in contact with the filter layer 5 and is filtered, and then passes through the filter network 20 of the filtrate water collection section 7 and is filtered. Thereafter, the filtrate is filtered and discharged via the filtrate collection section 7 → the second water pipe 16. The raw water to the second raw water chamber 11 of the filtration device according to the embodiment is supplied from the raw water supply section 8 to the first raw water chamber 6.
It is intended to be supplied indirectly through
Used in combination with the raw water supply section 8 to supply raw water to the second raw water chamber 1
A second raw water supply section that directly supplies water into the second raw water chamber 11 may be provided in the second raw water chamber 11.

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

Washing water is made to continuously flow into the rotating drum 12 from the second water pipe 16, and the rotating drum 12 is rotated. As the rotary drum 12 rotates, the granular filter media in the filter layer 5 move as shown by solid arrows in FIG. 2, and the adhering suspended solids are dissociated by rubbing the granular filter media against each other. Further, by rubbing the granular filter medium against the inner surface of the filter wall 10 of the partition wall 4, the suspended solids attached to the inner surface of the filter wall 10 are dissociated. These dissociated adhering suspended solids are then discharged by the outflow of washing water, which will be described below. When the filter layer 5 is formed of filter sand, the surface of the filter layer 5 is inclined at an angle of 30 degrees, which is the angle of repose of the sand, and the granular filter medium moves by continuously sliding down.

On the other hand, the previous washing water passes through the second water pipe 16 as shown by the dotted line arrows in Figures 1 and 2, reaches the sewage water collection section 7, and flows out from the second water flow port 18 of the sewage water collection section 7. A part of the washing water flows upward and washes the inside of the filter layer 5, and flows from the surface of the filter layer 5 to the first raw water chamber 6 to the raw water supply section 8.
→It is discharged through the first water pipe 15. In addition, a part of the washing water flowing out from the second water outlet 18 of the filtered water collecting section 7 becomes a downward flow and washes the inside of the filter layer 5, so that when it comes into contact with the filter layer 5, the partition wall 4 Filter wall 10 or water-permeable part 9 → second raw water chamber 11 → first
The waste water is discharged through the washing water outlet 23.

As described above, the cleaning action of this filtration device is achieved by the movement of the granular filter medium accompanying the rotation of the rotary drum 12 and the outflow of the washing water from the filtrate collection section 7 in the filter layer 5 in two directions. is properly cleaned.

In addition, during this washing, the granular filter medium and the filter net 20 are rubbed together due to the flow of the granular filter medium and the accompanying movement of the filter net 20 of the filtrate water collection section 7, and the turbidity on the outer surface of the filter net 20 is removed. and other deposits are dissociated and removed.

Further, as the filter net 20 is moved, the filter net 20 and the sliding member 21 are also rubbed together, and the deposits on the inner surface of the filter net 20 are also dissociated and removed.

Next, a second embodiment of the filtration device according to the present invention will be described with reference to FIGS. 3 and 4.

The filter tank 1 is constituted by a horizontal rotating drum body 31, and the inside of the rotating drum body 31 is divided in the horizontal direction by a dividing wall 32, and a gathering chamber 33 is formed on the right side of FIG. 3. Further, the partition wall 4 is formed by a part of the side wall 34 of the rotating drum body 31, a part of the dividing wall 32, and a mesh body 35 through which a particulate filter medium can pass. It is partitioned into an inner part 2 and an outer part 3, and a filter layer 5 and a first raw water chamber 6 are formed in the inner part 2. and,
Most of the part of the partition wall 4 that is in contact with the filter layer 5 by the net 35 is formed into a water-permeable part 9, and most of the part that is in contact with the first raw water chamber 6 is a filter wall. It is formed in 10,
As a result, the outer part 3 inside the filter tank 1 becomes the second raw water chamber 11.
It is becoming. A discharge passage 36 for guiding particulate filter media is formed in the second raw water chamber 11 and extends spirally along the rotational direction of the rotary drum body 31, and the end of this discharge passage 36 is connected to the first discharge passage of the dividing wall 32. It communicates with the gathering room 33 via an outlet 37 .

Further, the raw water supply section 8 is inserted into the rotary drum body 31 from outside the rotary drum body 31 by penetrating through its rotary shaft center.
It is formed on the tip side of the 1' water pipe 38 leading to the inside. The filtered water collecting portion 7 is formed on the tip side of a 2' water pipe 39 that extends from the outside of the rotary drum body 31 through its axial center and reaches the inside of the rotary drum body 31. The 1' water pipe 38 and the 2' water pipe 39 are fixed to a pedestal 40 so as not to rotate when the rotating drum body 31 rotates, and the rotating drum body 31 extends along its rotation axis. It rotates using a portion of the 1' water pipe 38 and the 2' water pipe 39 that are present as fixed axes.

Further, the rotating drum body 31 is rotated by the driving force of a motor (not shown).

Note that the raw water supply section 8 and the first water pipe 38 do not only function to supply raw water, but also function to drain sewage washing water when washing the filter medium.
The filtrate collecting section 7 and the second 2' water pipe 39 function not only to collect filtrate, but also to drain washing water when washing the filter medium. Further, in the middle of the 1' water pipe 38, there is a discharge port 4 facing the gathering room 33.
A check valve 43 is provided in the middle of the discharge pipe 42 to prevent the water from flowing from the 1' water pipe 38 side to the discharge port 41 side.

In addition, the filtered water collecting portion 7 of the second water pipe 39 covers a portion 45 where the second water outlet 44 is provided with a filter net 46, and slides into contact with the inner surface of the filter net 46 during filter medium cleaning. A sliding contact member 47 is formed interposed between the filter net 46 and the portion 45. The sliding member 47 is formed of a spiral linear member wound around the portion 45.

Next, the filtration action of the filtration device shown in FIGS. 3 and 4 will be explained.

Raw water is continuously supplied into the rotating drum body 31 from the 1' water pipe 38 by operating a pump (not shown) or the like.

The raw water flows from the 1' water pipe 38 to the raw water supply section 8 to the first raw water chamber 6 as shown by the solid arrow in FIG. A part of the raw water that has reached the first raw water chamber 6 enters into the filter layer 5 from the surface of the filter layer 5 and is filtered, and then passes through the filter network 46 of the filtered water collection section 7 and is filtered. After that, the filtered water is filtered and discharged through the filtrate collecting section 7 → the second water pipe 39. Further, a part of the raw water that has reached the first raw water chamber 6 is removed from the filter wall 10.
The raw water passes through the filter tank 1, is filtered, and enters the outer part 3 of the filter tank 1, that is, the second raw water chamber 11. Then, the water enters the filter layer 5 through the water-permeable portion 9 of the partition wall 4 that is in contact with the filter layer 5 and is filtered, and then passes through the filter network 46 of the filtrate water collecting section 7 and is filtered. Thereafter, the filtered water is filtered and discharged via the filtrate collection section 7 → the second 2' water pipe 39.

Further, a part of the raw water that has entered the second raw water chamber 11 reaches the collection chamber 33 through the first discharge port 37. The raw water that has reached the gathering room 33 is
1′ Exhaust port 4 accompanying the flow of raw water in the water pipe 38
Due to the suction action from 1, the water flows through the discharge port 41 → the discharge pipe 42 → the 1' water pipe 38 → the raw water supply section 8, and then the first
Return to raw water chamber 6 again.

Next, the cleaning action of the filter device shown in FIGS. 3 and 4 will be explained.

Washing water flows from the second water pipe 39 to the rotating drum body 31.
At the same time, the rotating drum body 31 is rotated. This rotating drum body 31
As the granular filter medium rotates, the granular filter medium in the filter layer 5 moves as shown by the solid arrow in FIG. 4, and the adhering suspended solids are dissociated by rubbing the granular filter medium against each other. Further, by rubbing the granular filter medium against the inner surface of the filter wall 10 of the partition wall 4, the suspended solids attached to the inner surface of the filter wall 10 are dissociated. These dissociated adhering suspended solids are then discharged by the outflow of washing water, which will be described below.
When the filter layer 5 is formed of filter sand, the surface of the filter layer 5 is inclined at an angle of 30 degrees, which is the angle of repose of the sand, and the granular filter medium is moved as it falls down continuously.

On the other hand, the previous washing water passes through the 2' water pipe 39 as shown by the dotted line arrows in Figures 3 and 4, reaches the sewage collection section 7, and then flows from the 2' water outlet 44 of the sewage collection section 7. A part of the washing water flowing out becomes an upward flow and washes the inside of the filter layer 5, and flows from the surface of the filter layer 5 to the first raw water chamber 6 to the raw water supply section 8.
→ It is discharged through the 1st water pipe 38. Further, a part of the washing water flowing out from the second water outlet 44 of the filtered water collection section 7 becomes a downward flow and washes the inside of the filter layer 5, and when it comes into contact with the filter layer 5, the partition wall 4 is Filter wall 10 or water-permeable part 9 → second raw water chamber 11 → first
The water is discharged through the filter wall 10 of the partition wall in contact with the raw water chamber 6 or the water-passable portion 9 → the first raw water chamber 6 → the raw water supply section 8 → the 1' water pipe 38.

Further, a part of the washing water that has reached the second raw water chamber 11 passes through the first discharge port 37 and reaches the collection part 33, and then
As the cleaning water flows in the 1' water pipe 38, it is sucked up from the drainage port 41 and is discharged to the outside via the drainage port 41 -> the drainage pipe 42 -> the 1' water pipe 38.

In addition, during this washing, the granular filter medium and the filter net 46 are rubbed together due to the flow of the granular filter medium and the accompanying movement of the filter net 46 of the filtrate water collecting section 7, and the turbidity on the outer surface of the filter net 46 is removed. and other deposits are dissociated and removed.

Further, as the filter net 46 is moved, the filter net 46 and the sliding member 47 are also rubbed together, and the deposits on the inner surface of the filter net 46 are also separated and removed.

In this way, the cleaning action of this filtration device is achieved by the movement of the granular filter medium accompanying the rotation of the rotary drum body 31 and by the movement of the filter layer 5.
The filter layer 5 is properly washed by the washing water flowing in two directions from the filtrate collection part 7 in the filter, but at the same time, the filter layer 5 is cleaned properly. The discharge of the granular filter medium is also carried out as follows.

Granular filter media made into fine dust by the above-mentioned rubbing, etc.
That is, as the rotary drum body 31 rotates, the fine filter medium passes through the mesh 35 of the partition wall 4 and enters the discharge path 36.
After entering the interior, the liquid flows through the first discharge port 37 and collects in the collection chamber 33 by being guided by the discharge path 36 as the rotary drum body 31 rotates. And this gathering room 33
The fine dust-like filter media collected in the filter medium is discharged from the collection chamber 33 to the outside through the rejection pipe 42, together with the washing water.
In other words, due to the suction action from the drainage port 41 as the cleaning water flows in the 1' water pipe 38, it is automatically discharged to the outside via the drainage port 41 -> the waste pipe 42 -> the 1' water pipe 38. Ru.

In the filtration device according to the present invention configured as described above, raw water reaches the first raw water chamber 6 through the raw water supply section 8. A part of the raw water that has reached the first raw water chamber 6 is filtered from the surface of the filter layer 5 through the filter layer 5, reaches the filtered water collection section 7, and is discharged. Also, a part of the raw water that has reached the first raw water chamber 6 is filtered through the filter wall 10, and is filtered through the second raw water chamber 11 → the water-permeable part 9 → the filter layer 5, and the filtrate is collected. It reaches the water part 7 and is discharged. Therefore, according to the filtration device of the present invention, raw water enters the filter layer 5 not only from the surface side of the filter layer 5 but also from the water-permeable portion 9 side and is filtered, so that the effective use of the filter layer is improved. In addition, raw water that enters the filter layer from the water-permeable portion 9 side is filtered by the filter wall 10 and then filtered by the filter layer 5. There is an advantage that clogging of the filter layer 5 on the water-permeable portion 9 side can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a filtration device according to a first embodiment,
2 is a sectional view of the minus part in FIG. 1 during washing, FIG. 3 is a sectional view of the filtration device according to the second embodiment, and FIG. 4 is a sectional view of the minus part in FIG. 3 during washing. be. Main symbols in the diagram...1: Filter tank, 2: Inner part,
3: outer part, 4: partition wall, 5: filter layer, 6: first raw water chamber, 7: filtrate water collection part, 8: raw water supply part, 9: water-permeable part, 10: filter wall, 11: 2nd
Raw water room.

Claims (1)

[Claims] 1. A partition wall 4 that partitions the inside of the filter tank 1 into an inner part 2 and an outer part 3, and a partition wall 4 that is formed in the vertical direction of the inner part 2 in the filter tank 1. a filter layer 5 and a first raw water chamber 6 that are in contact with the partition wall 4, respectively; a filtrate collection section 7 located within the filter layer 5;
a raw water supply section 8 that directly supplies raw water into the first raw water chamber 6; A filtration device characterized in that the partition wall 4 in the portion that is in contact with the raw water chamber 6 is formed on a filter wall 10, so that the outer part 3 in the filter tank 1 becomes a second raw water chamber 11. . 2. The filtration device according to claim 1, wherein the filter layer 5 is formed above the inner part 2 in the filter tank 1.