JPS5933454Y2 - "filtration" device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter device that can automatically unclog a filter medium.

In conventional filtration equipment, if the filter material that filters treated water becomes clogged with accumulation of impurities, the flow of the treated water is stopped, the filter material is removed, the impurities are removed, and the filter material is reinstalled. However, this method requires a lot of effort to attach and remove the filter, and at the same time, the filter material is consumed and is uneconomical.

The present invention improves these conventional drawbacks,
To provide a filtration device capable of automatically removing clogging of a filter material and allowing the filter material to be used for a long period of time.

FIG. 1 is a partially sectional front view of an embodiment of a filtering device according to the present invention, and FIG. 2 is a partially enlarged view thereof.

While injecting wastewater from the introduction pipe 1 into the coagulation tank 2,
When the flocculant is similarly injected through the inlet tube 3 and stirred by the stirrer 4, the flocs settle to the bottom, and water accumulates at the top.

This surface water is pumped up through a conduit 7 by a gear pump 6 driven by a motor 5, and is supplied from an upper inlet to a water storage tank 8 where it is stored as treated water.

The flocs settled at the bottom of the flocculation tank 2 are led to a filter or the like through a conduit 9 and are filtered.

The treated water in the water storage tank 8 flows out from the outlet at the bottom of the tank, passes through a conduit 10 below the bottom, and is supplied to the filtration tank 11 from the inlet at the bottom.

A mounting plate 1 is provided on the inner surface of the filtration unit 11 over the entire circumference.
2 is formed, and a box-shaped container 1 is mounted on this mounting plate 12.
The outer peripheral flange portion of No. 3 is placed on it.

Then, the container 13 is tightly fixed to the mounting plate 12 via the backing 15 by the screws 14.

A plurality of containers 13 are provided in the waste ink 11 at regular intervals in the vertical direction in order to increase the receiving area.

In this embodiment, there are two. The container 13 has a number of holes formed in its bottom surface, and a filter material 16 made of furnace cloth or the like is placed on the bottom surface.
A filter aid 17 such as sand is further spread on the filter medium 16.

A partition plate 18 made of a flexible material is provided between each container 12.

The treated water enters from the inlet at the bottom of the ink 11, passes through the hole in the lower container 13, passes through the filter material 16 and the filter aid, goes around P, enters the chamber at the bottom of the partition plate 18, and from there enters the conduit. 19 and is stored above the filter tube 11.

On the other hand, some of the treated water enters the chamber above the partition plate 18 through the conduit 20, is filtered through the holes in the upper container 13 through the filter material 16 and the filter aid 17, and is stored above the filtration tank 11. Ru.

The treated water thus filtered and stored above the filtration tank 11 is discharged to the outside through a conduit 21 serving as an outlet provided at a position lower than the inlet of the water storage tank 8.

Here, the filter material 16 and filter aid material 17 in the container 13 at each stage are
When impurities accumulate and cause clogging, resistance to the flow of treated water increases, and the water level of treated water in the water storage tank 8 rises.

As a result, the float 23 that operates the float switch 22 serving as the detection means is pushed up, and the float switch 23 is pushed up.
2 turns on.

As a result, the solenoid valve 24 located between the outlet of the water storage tank 8 and the conduit 10 is closed, and the solenoid valve 25 located on the side of the conduit 10 is closed.
opens.

Note that until this state is reached, the solenoid valve 24 is open and the solenoid valve 25 is closed.

As a result, the treated water that had accumulated above the filtration tank 11 flows backward, returns to raw water from the conduit 10 through the conduit 26, and is again injected into the coagulation tank 2 from the introduction pipe 1.

At this time, impurities adhering to the filter medium 16 and filter aid 17 are washed away and removed by the treated water flowing back.

Note that since the electromagnetic valve 24 is closed, the process in the water storage tank 8 does not flow out.

A timer that operates when solenoid valve 24 closes and solenoid valve 25 opens returns the solenoid valves 24, 25 to their original state after a certain period of time sufficient to remove the impurities.

When the solenoid valve 24 opens, the treated water in the water storage tank 8 is transferred to the conduit 1 again.
0 and is supplied to the filtration tank 11, and goes down the float 23, and the float switch 22 is turned off.

Then, normal filtration processing is performed again.

In addition, 27 is a conduit for leading out treated water and returning it to raw water when the water storage tank 8 is full.

As described above, according to the present invention, it becomes possible to automatically remove clogging of the filter material, which simplifies the filtration process, improves work efficiency, and allows the filter material to be used for a long time. .

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of an embodiment of a filtering device according to the present invention, and FIG. 2 is a partially enlarged view thereof. 8...Water tank, 10.19.20.21
. 26... Conduit, 11... Filtration tank,
13...Container, 16...Filtering material, 17
...Filter aid, 18...Partition plate, 22
...Float switch, 23...Float, 24.25...Solenoid valve.

Claims (1)

[Scope of utility model registration request] A water storage tank that stores treated water that flows in from above, a filtration tank that is installed at approximately the same height as this water storage tank and has an outlet above, and an outlet at the bottom of the water storage tank and a flow at the bottom of the filtration tank. A conduit connecting the inlet, a first solenoid valve provided between the bottom of the water storage tank and the conduit, a second solenoid valve provided between the conduit and the backflow discharge conduit, and A first electromagnetic valve is provided, the first electromagnetic valve is provided with a filter material provided to filter the treated water, and a detection means that operates when the treated water in the water storage tank rises to a predetermined water level, and when the detection means is not operating. A filtration device that opens and closes a second solenoid valve, and when a detection means operates, closes the first solenoid valve and opens the second solenoid valve.