JPH09164304A - Filter water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter water purifier in which a contaminated filter medium is automatically washed without requiring much energy. SOLUTION: The bottom part of a tank 12 is made a bottom plate member 22 having plural openings, and a filter bed is constituted of a filter medium consisting of a lot of small pieces of a material having low specific gravity, and on the upper surface of the filter bed, a hemispherical cover member 26 having plural openings is mounted, and on the top of the cover member 28, an air reservoir 32 equipped with an air vent hole 34 is installed, and below the bottom plate member 22, a water chamber 24 communicating with a purified water conduit 40 and washing water discharge pipe 44, and in the water chamber 24, an air jetting plate 48 having a lot of nozzles 46 is installed. Besides, the air jetting plate 48 is connected to a compression air pump 54 through an air conduit 52, and a water supply pipe 14, the purified water conduit 40, the purified water discharge pipe 44 and the air conduit 52 are provided with valve devices 18, 38, 42 and 50 respectively. The opening/closing of these valves is automatically controlled by previously programmed information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter water purification device, and more particularly, to a device for filtering contaminants contained in raw water into purified water.

[0002]

2. Description of the Related Art Water used in industry and various industries including drinking water must be supplied as purified water by removing pollutants or suspended substances contained in raw water.

Generally, a properly designed filter bed is used in the final stage of water purification treatment. Quartz sand, gravel, a porous body, etc. are used as the filter medium constituting the filter bed, which is selected according to the purpose.

[0004]

When these filter media are used for a long period of time, they are contaminated by the pollutants contained in the raw water. Therefore, the filter media are regularly cleaned and removed. ing.

The cleaning of these filter media is to wash the gravel of the filter media and other substances generally having a large specific gravity with water, which requires a considerably large amount of energy and has a problem that the scale becomes large.

In view of the above-mentioned problems to be solved, the present invention uses, as the filter medium, a filter medium composed of a small piece of a substance having a relatively small specific gravity, that is, a floating filter medium made of polystyrene, for example. Raw water is filtered by the filter bed composed of this filter medium to obtain purified water, and a large amount of energy is used to periodically pollute the filter medium by injecting an air stream into the water to stir the contaminated filter medium. It is to provide a filtration water purification apparatus that can be easily and automatically removed without performing the above.

[0007]

To achieve this object, according to the present invention, a substance having a relatively small specific gravity, for example, a synthetic resin, is used as a filter medium constituting a filter bed in a tank for supplying raw water to be filtered. Using a levitation filter material made of, after a predetermined filtration process, air from a compressed air source is sent into the water from below the filter bed, and the filter material with a small specific gravity is separated and stirred to remove contaminants adhering to the filter material. Remove.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the filter water purification apparatus 10 of the present invention includes a cylindrical tank 12. A water supply pipe 14 for supplying raw water to be filtered and an overflow pipe 16 for keeping the water level in the tank 12 constant are connected to the tank 12, and a water supply valve device 18 is connected to the water supply pipe 14. Has been placed.

The bottom of the tank 12 is, as shown in FIG.
It is partitioned by a bottom plate member 22 having a large number of openings 20 and is connected to a funnel-shaped water chamber 24 for receiving purified water filtered in the tank 12 as described later.

A filter medium 26 made of porous particles having a small specific gravity is arranged above the bottom plate member 22 of the tank 12 to filter raw water so as to form a filter bed.

A hemispherical lid member 28 is placed on the upper surface of the filter bed composed of the filter material 26. Hemispherical lid member 28
Can be made of, for example, a synthetic resin, and a large number of small openings 30 are perforated. A bowl-shaped air reservoir 32 for floating the lid member 28 is provided on the top of the lid member 28, and an air vent hole 34 is formed in the ceiling portion of the air reservoir 32.

A stopper member 36 is provided on the inner wall of the upper portion of the tank 12 to set the upper limit when the lid member 28 floats as will be described later.

A funnel-shaped water chamber 24 below the bottom plate member 22 having a large number of openings 20 is connected to a purified water conduit 40 having a drain valve device 38, and the lower end of the water chamber 24 has a flush water having a valve device 42. It is connected to the discharge pipe 44.

The water chamber 24 includes a bottom plate member 22 of the tank 12.
In the vicinity of, an air injection plate 48 having a number of nozzles 46 for injecting air upward is provided, which air injection plate 48 is provided with a compressed air pump 54 via an air conduit 52 having an air valve device 50. Connected to.

It should be noted that all the valve devices 1 described so far are
Reference numerals 8, 38, 42 and 50 are well-known motorized valve devices, and their opening and closing are programmed in advance so that they can be automatically controlled.

[0016]

The operation of filtering raw water by the filtration and purification apparatus 10 of the present invention is as follows.

A valve device 42 for the wash water discharge pipe 44 of the water chamber 24
And the air valve device 50 of the air conduit 52 connected to the air injection plate 48 are closed, and the water supply valve device 18 of the water supply pipe 14 is closed.
And the drain valve device 38 of the water purification conduit 40 connected to the water chamber 24 are opened.

By this, the raw water to be filtered is the water supply pipe 1.
4 flows into the tank 12. The raw water that has flowed into the tank 12 passes through the opening 30 of the lid member 28 and enters the filter medium 26 as a downward flow. Also, the lid member 28
Is pressed by the water pressure of the inflowing raw water, and the lid member 2
The filter medium 26 between the base plate member 8 and the bottom plate member 22 is formed into a filter bed having a constant density. Then, contaminants contained therein are removed from the raw water passing through the filter bed, and the purified water flows into the water chamber 24 through the opening 20 of the bottom plate member 22, and the purified water conduit 40
It can be supplied to a desired place via.

When this filtration process is continued and a certain period of time elapses, the cleaning process of the filter medium 26 is started according to preprogrammed information (see FIG. 4).

That is, the water supply valve device 18 is automatically closed and the air valve device 50 is opened.

By opening the air valve device 50,
The pressurized air sent from the compressed air pump 54 to the air injection plate 48 via the air conduit 52 is ejected as bubbles from the nozzle 46 of the air injection disk 46 toward the bottom plate member 22 of the tank 12, and the bottom plate member 22 is ejected. When passing through the openings 20 and passing between the filter media 26 constituting the filter bed and reaching the air reservoir 32 of the lid member 28, the air is collected in the air reservoir 32 of the lid member 28, whereby the lid member 28 is The peripheral portion is floated to a position where it contacts the stopper member 36.

As the lid member 28 floats, the lid member 2
8 and the bottom plate member 22 are widened, each particle of the filter medium 26 having a small specific gravity filled between the two becomes a floating state, and due to the interaction between the upward flow of bubbles and the hemispherical lid member 28, the tank The raw water in 12 is stirred to remove the contaminants adhering to the filter medium 26, and the water containing the contaminants is collected in the water chamber 24.

Next, by pre-programmed control, the valve device 42 of the wash water discharge conduit 44 is opened, the contaminated water in the water chamber 24 is discharged to the outside, and the air valve device 50 is closed. Then, the supply of air to the tank 12 is stopped, and the air remaining in the air reservoir 32 of the lid member 28 also passes through the overflow pipe 16 from above the tank via the air vent hole 34 at the top of the lid member 28. Is discharged to the outside to complete the cleaning process.

[0024]

[Effect] According to the present invention, the raw water containing contaminants can be constantly filtered through a fresh filter medium by alternately repeating the above-described filtration process and washing process, and the contaminants attached to the filter medium 26 can be filtered. For cleaning the air
Just by injecting air from it, the filter medium 26 is cleaned and removed by the water agitated by the bubbles, but the cleaning does not require too much energy as in conventional devices.

Incidentally, in the present invention, for example, the tank 12 is based on the preferred embodiment described in detail above.
The shape can be changed as appropriate, such as a shape other than a cylinder.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a preferred embodiment of a filter water purification apparatus according to the present invention.

FIG. 2 is a plan view showing a bottom plate member of the filtration and water purification apparatus of the present invention.

FIG. 3 is an elevational view showing a part of the lid member in section for showing the structure of the lid member.

FIG. 4 is a schematic cross-sectional view showing an internal state of the filtration water purification apparatus according to the present invention during a cleaning process.

[Explanation of symbols]

 10 Filtration Water Purification Device 12 Tank 14 Water Supply Pipe 16 Overflow Pipe 18 Water Supply Valve Device 20 Opening 22 Bottom Plate Member 24 Water Chamber 26 Filter Material 28 Lid Member 30 Small Opening 32 Air Reservoir 34 Air Venting Hole 36 Stopper Member 38 Drainage Valve Device 40 Water Purification Pipeline 42 Valve Device 44 Wash water discharge pipe 46 Nozzle 48 Air injection plate 50 Air valve device 52 Air conduit 54 Compressed air pump

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B01D 29/08 530D 540A

Claims (4)

[Claims] 1. A tank comprising a tank for supplying raw water containing pollutants via a water supply pipe, a filter bed arranged in the tank, and a water purification conduit for discharging purified water filtered through the filter bed. In the filtration and water purification device, the bottom of the tank is a bottom plate member having a plurality of openings, the filter bed is composed of a filter medium composed of a large number of small pieces of a substance having a small specific gravity, and a plurality of filters are provided on the upper surface of the filter bed. A hemispherical lid member having an opening, an air reservoir provided with an air vent hole at the top of the lid member, and the water purification conduit and the discharge pipe below the bottom plate member of the tank. A water chamber connected to the water chamber, an air jet plate having a large number of nozzles provided in the water chamber, the air jet disc connected to a compressed air pump via an air conduit, Water supply pipe, the water purification pipe, the discharge And the and the provision of the respective valve device in the air conduit, filtered water purification device comprising a be automatically controlled by a preprogrammed information the opening and closing of the valve device. 2. The filtration water purification apparatus according to claim 1, wherein the filter medium composed of small pieces of the substance having a small specific gravity is a floating filter medium made of synthetic resin. 3. The filtered water purifier according to claim 1, wherein a stopper member for the lid member is provided on an inner wall of an upper portion of the tank. 4. When the filter bed is contaminated by filtering the raw water, the supply of the raw water into the water tank is stopped, and air is jetted from a nozzle of the air jet plate to form the filter bed. A small piece of filter medium having a low specific gravity is stirred with water in a tank to wash the filter medium, and the wash water is removed from a wash water discharge pipe.
The filtration water purification device described in 1.