JPH0222683B2 - - Google Patents

Description

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

[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 first introduced above the preliminary filtration tank installed on the side of the main filtration tank, and after being filtered by the filter material in the tank, it descends and flows below the receiving plate of the main filtration tank. It is then filtered while rising inside the main filtration tank, collected at the upper part, and then discharged to the outside of the tank.

Normally, this water is once sent to a filtration rate adjustment tank installed on the side of the main filtration tank, and then passes through a notched partition plate installed in this adjustment tank.
Its outflow rate is adjusted.

[Problem that the invention seeks to solve]

In the conventional upward type filtration device, as mentioned above, the preliminary filtration tank was installed on the side of the main filtration tank, so the planar area was correspondingly large, which resulted in a reduction in the area occupied, installation work, and price. It was a disadvantage.

[Means for solving problems]

In order to solve the above problem, according to the present invention, a filtering material layer is provided on a porous receiving plate provided near the bottom of the filtration tank, and the water introduced below the receiving plate is made to rise. and an upward filtration device that performs filtration by passing through a filtration material layer,
Above the filter material layer, a preliminary filtration tank is provided on one side of the inner upper part of the main filtration tank, and at the inner upper part of the preliminary filtration tank, a type of aeration is provided that flows down from the peripheral edge provided at the tip of the water inflow pipe to be filtered. A water conduit pipe in which the device is positioned and a large number of pores are drilled on the side surface of the lower end is suspended from the bottom wall of the preliminary filtration tank, and the lower end with the pores is connected to the main filtration tank. An upwardly directed filtration device is provided, which is characterized in that it is located below the receiving plate.

〔Example〕

In the figure, 1 is the main filtration tank, and a porous horizontal receiving plate 2 is provided above the bottom wall 1a of the tank, which 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.

At the top of the inside of the preliminary filtration tank 7, an aeration device 9a of the type that flows down from the peripheral edge, which is provided at the tip of the water inflow pipe 9 to be filtered, and an open end of an overflow pipe 10 are located, and also at the bottom. is provided with a suitable filter material 11.

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, both ends of which are 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 draining pipe connected to the lowest point of the bottom wall 1a of the main 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.

The amount of filtered water flowing into the filtration speed adjustment tank 8 is controlled by the adjustment valve 1 provided at the end of the water collection pipe 14.
8. The control of this regulating valve 18 is carried out in conjunction with the water level in the filtration rate regulating device 8.

〔Effect of the invention〕

(1) Unlike conventional filters, the preliminary filtration tank is provided inside the main filtration tank and above the filter material layer, so the preliminary filtration tank increases the overall area of the device. There isn't. Therefore, it is more advantageous than the conventional one in terms of installation area, installation work, and price.

(2) Since the preliminary filtration tank is located at the top, it is easy to remove impurities accumulated on the surface of the filtration material, and maintenance is easy.

(3) Since an aeration device is installed at the tip of the inflow pipe,
The amount of dissolved oxygen in the preliminary filtration tank becomes large, and spoilage of the raw water is prevented.

(4) There are many pores in the lower end of the introduction pipe that connects the preliminary filtration tank and the bottom of the main filtration tank, so the introduced water changes direction in an orderly manner and flows out from these pores. and an effective precipitation action takes place. Furthermore, when clean water is sent in from the introduction pipe for cleaning, the pores function as nozzles, and the bottom part is effectively cleaned.

[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 of the same in longitudinal section. 1...Main filtration tank, 1a...Bottom wall, 1b...Front wall, 1c...Rear wall, 1d, 1e...Side wall, 1f...
... Lid plate, 2 ... Reception plate, 3 ... Washing water pipe, 4 ... Filter material layer, 5 ... Sludge collection groove, 6 ... Sludge removal pipe, 7 ... Preliminary filtration tank, 8 ... Filtration speed adjustment Tank, 9... Inflow pipe, 9a... Aeration device, 10... Overflow pipe, 11...
...Filtering material, 12...Introduction tube, 12a...Pore, 1
3...Notch plate, 14...Water collection pipe, 15...Receptacle, 16...Outflow pipe, 17...Sludge removal pipe, 18...
Regulating 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 the water introduced below the receiving plate is raised and filtered by passing through the receiving plate and the filtering material layer. In the above-mentioned upward filtration device, a preliminary filtration tank is provided on one side of the inner upper part of the main filtration tank above the filter material layer, and
An aeration device of the type that flows down from the peripheral edge provided at the tip of the water inflow pipe to be filtered is located in the upper part of the inside of the preliminary filtration tank, and a water conduit pipe with many pores bored on the side surface of the lower end is connected to the preliminary filtration tank. An upward type filtration device, characterized in that it hangs down from a bottom wall of a filtration tank, and its lower end portion with pores is located below a receiving plate in the main filtration tank.