JPH09201586A - Electrolytic flotation type water-purifying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further remove impurities contained in treated water and to enhance purifying efficiency to a large extent by relatively simple constitution by mounting a filter on the outside of the side-wall of an electrolytic case through which treated water after impurities are removed by electrolysis is passed. SOLUTION: When DC voltage is applied across an anode plate 20 and cathode plates 22, 22, a suspended substance in sewage is flocculated and floated by aluminum ions eluted from the cathode plates 22, 22 to become scum and this scum is accumulated in the scum storage part 12 of an electrolytic case. When the scum in the scum storage part 12 is accumulated in an amt. equal to or more than surface tension, the scum goes over the upper end part of the scum storage part to be discharged to a trough part to be drained from a scum discharge passage 17. The sewage flowing into a water tank 1 from a sewage introducing passage 4 is purified during the passage through intervals 21, 21 and subsequently passed through a filter 27 from the water passing holes of the side wall to be further filtered. When purifying operation is performed for a long time and impurities are accumulated on the surface of the filter 27, the electrolytic case is taken out of the water tank 1 and the filter 27 is detached from the electrolytic case to be washed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic levitation type water purification apparatus for aggregating and separating colloidal components, oils and the like contained in domestic wastewater and industrial waste liquid by electrolytic treatment.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. Hei 10 (1999) -31980 discloses a method of electrolytically treating domestic wastewater or industrial wastewater discharged from general households by electrolysis to agglomerate and float colloidal components and oils contained in the wastewater. No. 7-51676 and Japanese Patent Laid-Open No.
It is known in Japanese Patent Application Laid-Open No. -60258, Japanese Patent Application Laid-Open No. 6-343972, and the like.

On the other hand, the above-mentioned Japanese Patent Laid-Open No. 6-34397, for example.
In the structure described in Japanese Patent Laid-Open No. 2-2, since the impurities are floated and removed only by the electrolytic action between the cathode 3 and the anode 4, relatively small impurities remain without being removed. However, there is a problem in that the purification capacity cannot be efficiently increased in the case of purifying.

[0004]

Therefore, an object of the present invention is to further improve the purifying ability with a relatively simple structure.

[0005]

SUMMARY OF THE INVENTION According to the present invention, at least a pair of electrode plates are arranged facing each other at a predetermined interval in a water tank having an open upper surface, and at the bottom of the water tank a sewage introduction channel and an upper part are provided. The treated water discharge passages are connected to each other, and the periphery of the electrode plate is surrounded by a cylindrical electrolytic case with a bottom protruding upward from the water surface in the water storage tank. A hole is bored and a scum discharge path for discharging scum generated on the water surface in the electrolytic case is connected to the upper part of the electrolytic case, and a filter is attached to the outside of the side wall of the electrolytic case.

Further, according to the present invention, a lid portion for covering the opening of the water storage tank is integrally formed on the electrolytic case.

Further, according to the present invention, a gutter is formed around the outer periphery of the upper end of the electrolytic case of the lid, the gutter is provided with an inclination, and the scum discharge path is communicated with the low position of the inclination. Is.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION First, an embodiment of the present invention will be described with reference to FIG. 1. Reference numeral 1 is a cylindrical water tank having an opening 2 on its upper surface.
A treated water discharge passage 5 for discharging treated water such as bath water after bathing and domestic wastewater discharged from homes is connected to the lower portion of the side wall 3, and a treated water discharge passage 5 for discharging treated water is also provided on the upper side wall 3. They are in communication with each other.

Reference numeral 6 denotes a bottomed cylindrical electrolytic case made of a non-conductive insulating material such as resin and disposed in the central portion of the water storage tank 1. The electrolytic case 6 has a plurality of side walls 7 as shown in FIG. The water passage hole 8 ... Is bored, the inflow hole 10 is bored in the substantially central portion of the bottom wall 9, and the upper portion is expanded stepwise to form a scum storage portion 11. This scum storage portion The upper end portion 12 of the above is configured to be located above the water surface 13 in the water storage tank 1.

Reference numeral 14 denotes a lid portion integrally formed on the outer periphery of the scum storage portion 11 of the electrolytic case 6, which is constructed so as to cover the opening 2 of the water storage tank 1 and at the upper end portion 12 of the water storage tank 1. On the outside, a gutter with the bottom surface 15 set lower than this upper end.
16 is formed, and the bottom surface is an inclined surface that is lowered toward a part, and the scum discharge path 17 is communicated to the low position of this inclination.

The scum discharge path 17 has a vertical pipe 18 extending integrally vertically downward from the bottom surface 15 of the trough portion 16, one end of which faces the lower end of the vertical pipe, and the other end of which is the water storage. It is composed of a discharge pipe 18 that penetrates the side wall 3 of the tank 1 and protrudes to the outside. By connecting the discharge pipe and the vertical pipe 18 detachably, the electrolytic case 6 can be easily attached and detached from the water storage tank 1. It is configured like.

Numeral 19 is an electrode plate set attached to the substantial center of the electrolytic case 6, and as shown in FIG. 3, it is made of, for example, aluminum with a predetermined gap 21, 21 on both sides of an anode plate 20 made of, for example, stainless steel. A pair of cathode plates 22 made of a soluble metal such as
These are connected by non-conductive frame bodies 23, 23 so that 22 are opposed to each other, and flanges 24, 24 are provided at the lower ends of these frame bodies.
The electrode plate set 19 is fixed to the electrolytic case 6 by connecting the bottom frame 25 via the bottom wall 9 of the electrolytic case 6 by this flange.

The bottom frame 25 has a communication hole 26 for communicating the lower ends of the spaces 21 and 21 with each other in the water tank 1.

In FIG. 1, 27 is a filter detachably attached to the outside of the side wall 7 of the electrolytic case 6, which is made of non-woven fabric or the like.

Denoted by 28 is a water level sensor for detecting the water level in the water storage tank 1, and controls the water level by controlling a pump or the like for supplying the waste water into the water storage tank 1 from the waste water introduction passage 4.

Reference numeral 29 is a dirt sensor for detecting the turbidity of the dirty water in the water storage tank 1. For example, a light emitting element and a light receiving element are combined, and the light transmittance of the dirty water is detected by the output of the light receiving element. There is.

Then, a DC power source (not shown) is provided between the anode plate 20 and the cathode plates 22 and 22, for example, 0.5 A at around 15V.
By applying a DC voltage of ~ 2 A, electrolysis occurs between these electrodes, and the suspended substances in the sewage are aggregated and floated on the aluminum ions eluted from the cathode plates 22 and 22 to form a scum, resulting in the electrolysis case 6 Accumulated in the scum storage section 11 of.

When the scum in the scum storage section 11 accumulates above the surface tension, the scum passes over the upper end section 12 and is discharged to the trough section 16 and then discharged from the scum discharge path 17 to the outside.

On the other hand, the sewage flowing into the water storage tank 1 through the sewage introduction path 4 is purified while passing through the intervals 21, 21,
As shown by the arrow in FIG. 1, after passing through the water passage holes 8 in the side wall 7 ... Filter 27 to be further filtered, the above circulation is repeated for purification.

The water storage tank 1 is provided with, for example, a wastewater introduction passage 4
To the bottom of a bathtub (not shown), the treated water discharge path 5 to the top of the bathtub, and the bath water in the bathtub is circulated in the water tank 1 by a pump or the like so that the bathwater is purified. Install.

Further, if the cleaning operation is carried out for a long time, impurities will be accumulated on the surface of the filter 27. Therefore, if the electrolytic case 6 is taken out of the water storage tank 1 and the filter 27 is removed from the electrolytic case 6 for cleaning, the filter 27 is removed. It is possible to prevent the reduction of the purification efficiency due to the clogging of.

Further, by scrubbing the electrolytic case 6 when cleaning the filter 27, scum and the like in the trough portion 16 can be removed at the same time and relatively easily.

[0023]

According to the structure of the present invention, a filter is attached to the outside of the side wall of the electrolytic case through which the treated water after the impurities are removed by electrolysis passes, so that the impurities contained in the treated water are further removed by this filter. The purification efficiency can be greatly improved with a relatively simple structure.

Further, according to the present invention, the electrolytic case is integrally formed with the lid for covering the opening of the water storage tank, so that the electrolytic case can be relatively easily attached and detached even when the treated water is stored in the water storage tank. This makes it possible to easily wash the electrolytic case and the like.

Further, according to the present invention, the gutter part for discharging the scum floating to the upper part in the electrolytic case by electrolysis is formed in the lid part of the electrolytic case, so that the gutter part can be relatively easily cleaned at the same time as cleaning the electrolytic case. It can be washed.

[Brief description of drawings]

FIG. 1 is a side vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a side view showing a partial cross section of the same electrolytic case.

FIG. 3 is an exploded perspective view of the same main part.

[Explanation of symbols]

 1 Water tank 2 Opening 4 Sewage introduction path 5 Treated water discharge path 6 Electrolysis case 8 Water passage hole 14 Lid 16 Gutter 17 Scum discharge path 20 Anode plate 22 Cathode plate 27 Filter

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[Procedure amendment]

[Submission date] February 26, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuya Osugi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A water tank having an open upper surface, at least a pair of electrode plates facing each other at a predetermined interval, and a sewage introduction path communicating with a lower part of the water tank and a treated water discharging path communicating with an upper part of the water tank. And, the periphery of the electrode plate, the upper part is surrounded by a bottomed cylindrical electrolytic case protruding upward from the water surface in the water storage tank, a plurality of water passage holes are bored in the side wall of the electrolytic case, An electrolytic levitation purified water characterized in that a filter is attached to the outside of the side wall of the electrolytic case, in which a scum discharge path for discharging scum generated on the water surface in the electrolytic case is connected to the upper part of the electrolytic case. apparatus. 2. The electrolytic levitation water purifier according to claim 1, wherein a lid portion that covers the opening of the water storage tank is integrally formed on the electrolytic case. 3. A gutter is formed around an outer periphery of an upper end of the electrolytic case of the lid, and a gutter is provided with an inclination, and the scum discharge path is communicated with a lower position of the inclination. The electrolytic levitation water purifier according to claim 2.