JPH0221284B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is an upward filtration device, that is, a porous receiving plate provided near the bottom of a filtration tank, in which a filter material is layered, and the receiving plate is By raising the water introduced below the plate and passing it through the receiving plate and filter layer,
The present invention relates to a filtration device that performs filtration.

[Conventional technology]

The above-mentioned type of filtration device itself is, for example,
It is known as seen in Japanese Patent No. 47-14860.

The water to be treated is filtered while rising inside the main filtration tank, collected at the upper part, and then discharged outside the tank, but this water is usually filtered through a filter installed on the side of the main filtration tank. The outflow rate is adjusted by once being fed into a speed adjustment tank and passing through a notched partition plate installed in this adjustment tank.Furthermore, the filtration rate is measured in this tank using an appropriate filtration rate meter. be done.

[Problem that the invention seeks to solve]

In the conventional upward type filtration device, as mentioned above, the filtration speed adjustment tank was installed on the side of the main filtration tank, so the flat area was correspondingly large, which caused problems in terms of occupied area, installation work, and price. was at a disadvantage.

[Means for solving problems]

In order to solve the above problems and increase the filtration effect per flat area, according to the present invention, a filtration tank material layer is provided on a porous receiving plate provided near the bottom of the filtration tank. The water introduced downward is raised,
In a filtration device that performs filtration by passing through a receiving plate and a filtration material layer, there is provided a floating water collection pipe having a large number of pores approximately above the center of the filtration material layer and having one end inclined slightly downward. In addition to establishing
A filtration speed adjustment tank equipped with a notch plate for slowly draining the filtered water is provided at the inner upper part of the filtration tank, and the descending end of the floating water collection pipe is connected to the filtration speed adjustment tank through a regulation valve. It is connected to the upstream side of the notch plate.

〔Example〕

In the figure, 1 is a filter tank, and a porous horizontal receiving plate 2 is provided above a bottom wall 1a that is slightly inclined in one direction with a slight gap.

On the receiving plate 2, there are provided a large number of washing water pipes 3 and a filtering material layer 4 made of stones, gravel, sand, or other suitable material whose particle size gradually decreases in the upward direction.

Directly above or slightly above the filter material layer 4, an appropriate number of gutter-shaped mud collecting grooves 5 are spanned between the front and rear walls 1b, 1c of the filter tank 1. The number and position of the mud collection grooves 5 are determined so that mud collection is averaged and efficiently performed.

The mud collecting groove 5 is made of metal or plastic, and is inclined in a certain direction, and its descending end is connected to a mud draining pipe 6 that penetrates the front wall 1b.

Above the filtering material layer 4, a preliminary filtration tank 7 is provided on the upper inner surface of one side wall 1d, and a preliminary filtration tank 7 is provided on the upper inner surface of one side wall 1d.
A filtration rate adjustment tank 8 is provided at the upper part of the inner surface of the chamber e.

A filtered water inflow pipe 9 and an overflow pipe 10 are open at the inner upper part of the preliminary filtration tank 7, and a suitable filter material 11 is also provided at the bottom. A water conduit 12 is suspended from the bottom wall 7a of the preliminary filtration tank 7, and a large number of pores 12a are bored in the side surface of the lower end of the conduit 12 that extends through the receiving plate 2 and hangs down.

A notch plate 13 is provided in the filtration rate adjustment tank 8, and a descending end of a floating water collection pipe 14, which is generally horizontal and has one end slightly inclined downward, is connected to the upstream side of the notch plate 13 via a regulating valve 18. has been done.

The water collection pipe 14 is a horizontal cylinder with a large number of pores 14a bored in its upper half, with both ends closed. U-shaped rod 15, 15 hanging from 1f
It is supported in a vertically movable manner.

An outflow pipe 16 is connected to the downstream side of the notched plate 13 of the filtration rate adjustment tank 8 .

17 is a sludge drain pipe connected to the lowest point of the bottom wall 1a of the filtration tank 1.

The water to be filtered that has flowed into the preliminary filtration tank 7 from the inflow pipe passes through the filter material 11, flows down inside the introduction pipe 12, exits through the pores 12a at the lower end, and then passes through the receiving plate 2 and the filter material layer. 4, accumulates above it, is guided to the filtration rate adjustment tank 8 by the water collection pipe 14, and the amount regulated by the notch plate 13 gradually flows out from the outflow pipe 16.

Note that the amount of filtered water flowing into the filtration speed adjustment tank 8 is regulated by an adjustment valve 18 provided at the end of the water collection pipe 14 . Control of this regulating valve 18 is performed in conjunction with the water level in the filtration rate regulating tank 8.

In the present invention, unlike conventional ones, the filtration rate adjustment tank 8 is provided inside the filtration tank 1 and above the filter material layer 4. The plane area of will not increase.

Therefore, it is more advantageous than the conventional one in terms of installation area, installation work, and price.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention with the cover plate removed, and FIG. 2 is a front view in longitudinal section of the same. 1...Filtering tank, 1a...Bottom wall, 1b...Front wall,
1c...Rear wall, 1d, 1e...Side wall, 1f...Lid plate, 2...Batch plate, 3...Washing water pipe, 4...Filtering material layer, 5...Sludge collecting groove, 6...Sludge removal Pipe, 7...Preliminary filtration tank, 8...Filtration speed adjustment tank, 9...Inflow pipe, 1
0...Overflow pipe, 11...Filtering material, 12...Introduction pipe, 12a...Pore, 13...Notch plate, 14...
... Water collection pipe, 15 ... Receiving pipe, 16 ... Outflow pipe, 17
...Sludge drain pipe, 18...Adjustment valve.

Claims (1)

[Claims] 1. A filtering material layer is provided on a porous receiving plate provided near the bottom of the filtration tank, and water introduced below the receiving plate is raised and filtered by passing through the receiving plate and the filtering material layer. In this filtration device, a floating water collection pipe having a large number of pores and one end inclined slightly downward is provided above the center of the filter material layer, and the filtered water is placed in the upper part of the inside of the filtration tank. A filtration speed adjustment tank equipped with a notched plate for slowly draining water is provided, and the descending end of the floating water collection pipe is
An upward type filtration device, characterized in that it is connected to the upstream side of a notched plate in a filtration rate adjustment tank via a regulating valve.