JPS5813928Y2 - Pressurized “filtration” device - Google Patents

Description

[Detailed description of the invention] In the conventional pressurized filtration device used for wastewater treatment, etc., as shown in Fig. 1, when the f-material in the r-filtration tank a is exposed to sunlight, backwashing is performed. We are using a method to remove this.

Normally, part of the treated water in the treated water tank C is used for backwashing, and the raw water supply pump d is stopped, and the backwash water pump e is activated to transfer a part of the treated water to r. Water is fed into the filtration tank a, passed through the filtration layer, and refluxed to the raw water tank f.

In this case, the amount of water pumped by the backwash water pump e is the raw water pump d.
It requires about 1.5 times as much as that of , and the discharge pressure is also higher.

Therefore, the backwash water pump is larger than the raw water pump, which increases the initial cost and requires more effort for maintenance.

This project was proposed in order to eliminate such defects, and includes an opening above the filtration layer located in the middle of the filtration tank over the entire surface of the filtration tank. A water discharge pipe, one end of which opens below the filtration layer in the filtration tank, and the other end of which opens into the lower part of the filtrate and backwash water storage chamber, a communication path that opens into the same storage chamber and has an air valve interposed therein. The present invention relates to a pressurized filtration device characterized by comprising a pressure air supply pipe and a filtrate discharge pipe that opens into the storage chamber and is provided with a valve.

Since the device of the present invention is configured as described above, during normal use, the air valve installed in the pressure air supply pipe is closed, and the valve installed in the filtrate water discharge pipe is opened, and the water to be treated is introduced. The water to be treated is supplied into the filtration tank from the pressure water discharge pipe for double backwashing, is filtered by a filtration layer disposed over the entire surface in the middle part of the tank, and this filtrated water is passed through the communication path. The filtrate is supplied from the filtration tank to the filtrate/backwash water storage chamber through the filtration tank, and the filtrate is discharged from the storage chamber through the filtrate discharge pipe.

Therefore, when clogging occurs in the filter layer and it is to be removed by backwashing, the valve installed in the filtrate discharge pipe is closed, and the valve installed in the pressure air supply pipe is closed. When the air valve is opened and pressurized air is supplied to the filtration and backwash water storage chamber through the same pressure air supply pipe, the filtration water in the storage chamber is filtered through the communication path to the filtration tank. The water enters the lower part of the filter layer, backwashes the filter layer, penetrates the filter layer, and is discharged from the treated water introduction and backwash pressure water discharge pipe that opens into the filtration tank above the filter layer. .

In this way, according to the device of the present invention, air is only used as the backwash water driving force for backwashing the r-layer in the swarf tank, and the backwashing pump and backwashing pump conventionally used in this type of device are This proposal has many advantages, such as eliminating the need for a washing tank and associated piping and valves, reducing initial costs, simplifying maintenance, and enabling high-speed backwashing due to the expandability of air. It is something that you have.

The present invention will be described below with reference to illustrated embodiments.

Reference numeral 1 denotes a pressurized filter main body, which is divided by a partition wall 2 into an upper filtration tank 3 and a lower filtered water/backwash water storage chamber 4.

Inside the filtration tank 3, a filtration layer 6 is supported on a support plate 5 so as to be located over the entire middle part of the filtration tank 3.

Further, a communication passage 7 opened at the center of the lower part of the filtration tank 3 extends to near the bottom of the storage chamber 4.

Reference numeral 8 denotes a water introduction and pressure water discharge pipe to be treated which opens above the filter layer 6 in the filtration tank 3, and the other end communicates with the raw water tank 9.

In the figure, V8 is a valve installed in the pipe line 8.

Further, a water supply pipe 10 to be treated connected to the raw water tank 9 branched out from the pipe 8 includes a raw water supply pump 11 and a valve VIO.
is interposed.

The storage chamber 4 includes a pressurized air supply pipe 12 with an air valve v1° interposed therein and a filtrate discharge pipe 1 with a valve V13 interposed therein.
3 is connected.

In the figure, reference numeral 14 denotes an air vent pipe in which a valve V14 is interposed, 15 a drain vent pipe in which a valve V15 is interposed, and 16 a raw water supply pipe.

When the water to be treated is filtered by the illustrated pressurized filtration device, as shown in FIG.
When Vl 5 is closed and the raw water supply pump 11 is operated to supply the water to be treated in the raw water tank 9 into the filtration tank 3 via the pipes 8 and 10, the water to be treated is filtered by the permeation layer 6. This filtered water is introduced into the storage chamber 4 through the communication path T, and is discharged through the filtered water discharge pipe 13.

Next, when the filter layer 6 is clogged and it is to be removed by backwashing, as shown in FIG. 4, the raw water supply pump 11 is first stopped, and the valve Vto tV13 is
tV14 tV15 is closed and valve V8. v12
When opened, pressurized air enters the upper part of the storage chamber 4 from the pressurized air supply pipe 12, the filtered water in the storage chamber 4 is replaced with this incoming air, and enters the filtration tank 3 from the communication path 7, After the filtration layer 6 is backwashed, it is discharged from the upper part of the filtration tank 3 to the raw water tank 9 via the pipe 8.

According to the illustrated device, it is only necessary to use air as the driving force for backwash water, and the backwash pump, backwash water tank, and attached accessories such as those seen in the conventional device shown in FIG. Piping and valves are no longer required.

FIG. 5 shows another embodiment of the pressurized filtration device according to the present invention, in which the positions of the filtration tank 3 that is applied to the filter main body 1 and the filtration water/backwash water storage chamber 4 are changed.

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

FIG. 6 shows another embodiment of the pressurized filtration device according to the present invention, in which the filter main body 1 is of a horizontal cylindrical shape.

In the drawings, parts equivalent to those of the above embodiments are given the same reference numerals.

Fig. 7 shows still another embodiment of the pressure filtration device according to the present invention, in which the vertical type f filtration device shown in Figs. Since the length of a stationary filter is long, in order to compensate for each drawback, the filter body 1
is separated into a filtration tank 3 and a flush water/backwash water storage chamber 4.

In the drawings, parts equivalent to those of the above embodiments are given the same reference numerals.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an overview of a conventional pressure filtration device, FIG. 2 is an explanatory diagram showing an outline of a pressure filtration device according to the present invention,
Figures 3 and 4 are explanatory diagrams showing the conditions of the water to be treated in the pressure filtration device shown in Figure 2 at appropriate times and during backwashing of the filter layer, Figures 5 and 6, and Figure 7 2A and 2B are explanatory diagrams showing the outline of each embodiment of the pressurized filtration device according to the present invention. DESCRIPTION OF SYMBOLS 1... Filter body, 3... Filtration tank, 4... Clear water and backwash water storage chamber, 6... Filtration layer, 7... Communication path, 8
・・・Pressure water discharge pipe for introducing treated water and backwashing, 12...
・Pressure air supply pipe, 13...Filtered water discharge pipe, V, 3
...Valve, Vl4 ...Valve.

Claims (1)

[Scope of utility model registration request] A pressure water discharge pipe for introducing water to be treated and for backwashing opens above the filtration layer disposed over the entire surface in the middle part of the filtration tank, one end of which opens below the filtration layer in the filtration tank. A communication passage whose other end opens to the lower part of the filtered water/backwash water storage chamber, a pressure air supply pipe which opens into the storage chamber and has an air valve interposed therein, and a pressure air supply pipe which opens into the storage chamber and has a valve interposed therein. A pressurized filtration device characterized by comprising a filtrate water discharge pipe.