JP2001149937A - Packed bed type electrochemical water treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance en electric dielectric constant and to enhance the water treatment efficiency of an electrochemical machine without closing a precipitate discharge port 14. SOLUTION: This packed bed type electrochemical water treating device has an electrochemical machine 2 having internal packing areas, granular media 21 for cleaning water, a raw water advance flow port 22 and treated water output 23 installed apart in the vertical direction of the electrochemical machine 2, a granular medium replenishing port 24 for replenishing the internal packing areas with the granular media 21 and a granular medium discharge port 25 for discharging the granular media 21 packed in the internal packing areas. A plurality of electrode rods 3 covered with insulating bushings 4 on their respective outer sides are inserted into the electrochemical machine 2 and the circumferential surfaces of the insulating jacket pipe 4 are provided with plural holes 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packed-bed electric system for converting water into chemical energy to perform an oxidizing action, a reducing action, an electrolytic corrosion action, an electrical neutralizing action and a flotation operation to treat water. The present invention relates to a chemical water treatment device.

[0002]

2. Description of the Related Art Conventionally, a filling type electrochemical water treatment apparatus filled with a water treatment medium has been used as an apparatus for treating acidic or alkaline water whose pH is far away from neutrality and sewage mixed with solids. Are known.

[0003]

SUMMARY OF THE INVENTION The present inventor has previously invented a packed bed type electrochemical water treatment apparatus (Japanese Patent Application No. 1999-149559). The present invention is a further improvement of the packed-bed type electrochemical water treatment apparatus invented earlier. First, the flow of water treatment using the packed bed type electrochemical water treatment device invented earlier will be described with reference to FIGS.

First, raw water is sent to an electrochemical system by a raw water transport pump B. A flow meter C and a flow control valve D are installed on the pipeline to control the set raw water treatment amount so that it can flow into the electrochemical system. Before the raw water enters the electrochemical system, a rapid mixer E is installed. The rapid mixer E is for adjusting the pH and avoiding the risk that the pH will be too low (such as pH <3) and the treatment system will be corroded.

The raw water prepared by the high-speed mixer E enters the electrochemical machines 1 arranged in series or in parallel and is processed. The electric field and electric current required for the electrochemical machine 1 are provided by a DC electric supply H.

When raw water is passed through the electrochemical machine 1, organic and inorganic contaminants in the raw water gather to form relatively large flocs. Flocs are formed because granular mediators are the best coagulants that release metal ions by electrolytic corrosion. Further, microbubbles of hydrogen and oxygen generated by the reaction in the electrochemical machine 1 adhere to the flocs. At this time, the raw water is another high-speed mixer G
And the solid-liquid separation reaction is accelerated. Further, a coagulant and a coagulant are selected and added in the high-speed mixer G.

After that, the raw water mixed with the coagulant and the coagulant enters the flotation tank I again, and the flocs to which the microbubbles adhere are gathered to float on the surface of the flotation tank I2 by buoyancy. . Flock is separated using a scum remover I2. Further, the scum is put into the scum collecting funnel I1 by the horizontal rotation of the scum remover I2. The water after treatment is
After passing through the scum plate I3, it is discharged or reused by the motor F. The removed scum is put into a scum storage tank J and subsequently sent to a dewatering unit. Thereafter, the scum is discarded.

During the operation, the granular media in the electrochemical machine 1 is gradually consumed and reduced by the electrolytic corrosion, and accumulates in the internal filling zone 17. If you leave this,
There is a risk that the internal filling section 17 may be closed. For this reason, it is necessary to perform an exchange operation of discharging the reduced granular medium from the granular medium discharge port 16 and replenishing the granular medium replenishment port 15 with new granular medium in a timely manner. .

In the packed-bed type electrochemical water treatment apparatus invented earlier, there is no need to interrupt the water treatment operation, and the old granular medium can be eliminated and put into the medium washer K.
Above the medium washer K, there is a sieve net K1 having a certain angle. At the upper end of the medium washer K, a high-pressure water feeder L is installed. At the front end of the high-pressure water feeder L, there is a high-pressure water cleaning nozzle L1 for cleaning the old granular medium sent to the sieve net K1. The old granular medium then passes through the sieve net K1 and falls into the lower storage part of the medium washer K.

The reusable granular media 4 slides down into one media storage tank M along the slope of the sieve net K1,
Reused in the electrochemical machine 1. In the medium storage tank M, there is a medium transporter N. The medium transporter N transports the granular medium to be reused to a medium replenishment tank P located at a higher position. At the same time, the granular medium is controlled by the valve 5 and gravity is used to replenish the electrochemical machine 1 in a timely manner. On the other hand, the washing water of the medium washing machine K returns to the raw water tank A and is reprocessed.
Used repeatedly.

The packed-bed type electrochemical water treatment apparatus invented earlier by the present inventor performs the above-mentioned water treatment, but has a problem which cannot be solved yet. The above device has a problem that the electric conductivity for performing wastewater treatment is low. In order to solve the problem of low electric conductivity, the porous electrode plate 1
The distance between the porous electrode plates 11 and 12 is preferably reduced, but in addition to adversely affecting the filling amount of the granular medium, if the distance between the porous electrode plates 11 and 12 is short, it is necessary to move the porous plate 18 upward. Come out. Therefore, the perforated plate 18 is connected to the granular medium outlet 1
6, which makes it difficult to discharge the granule mediator. Therefore, finally, the water treatment efficiency of the electrochemical machine 1 is reduced.

On the other hand, there is a problem that the water treatment efficiency of the electrochemical machine 1 is reduced by another action. That is, if a large amount of contaminants accumulate in the sludge discharge port 14 at the lower part of the electrochemical machine 1, the raw water inflow area of the raw water inflow port 13 is blocked, and the flow becomes difficult. This causes a problem that the water treatment efficiency of the electrochemical machine 1 is reduced.

As described above, the packed-bed type electrochemical water treatment apparatus invented earlier by the present inventor has two problems, namely, low electric conductivity and clogging of the sediment discharge port 14. Has a practical problem that the water treatment efficiency of the water is reduced. Therefore, an object of the present invention is to solve these problems.

[0014]

Means for Solving the Problems In order to solve the above problems,
The packed-bed type electrochemical water treatment apparatus according to claim 1 converts electric energy into chemical energy to perform an oxidizing action, a reducing action, an electrolytic corrosion action, an electric neutralizing action, and a flotation operation,
A packed-bed electrochemical water treatment apparatus for treating water, an electrochemical machine having an internal filling section as a hollow interior, and a granular medium for purifying water, which is filled in the internal filling section, Raw water inflow and treated water outlets installed vertically in the electrochemical machine, a granular medium replenishment port for replenishing granular media in the inner filling section, and a granular medium filled in the inner filling section A plurality of electrode rods, each of which is covered with an insulating sleeve in the electrochemical machine, and has a plurality of holes in the peripheral surface of the insulating sleeve. Like that. For this reason, the microcell effect between the granular media can be enhanced. In addition, the outside of the electrode rod is covered with an insulating sleeve, and a plurality of holes are provided on the circumferential surface of the insulating sleeve to isolate the granular medium, so that the electrode rod and the granular medium come into direct contact with each other. Or short circuit.
Furthermore, since water can pass through a plurality of holes on the circumferential surface of the insulating sleeve, the electrolytic action thereof can be promoted, and the water treatment effect can be enhanced.

According to a second aspect of the present invention, in the packed bed type electrochemical water treatment apparatus of the first aspect, the electrode rod is
Inside the electrochemical machine, they are arranged in a ring shape when viewed from above, and are arranged such that adjacent electrode rods are positive and negative. Thus, a desirable electric field is created, and the microcell effect between the granular media can be further enhanced.

According to a third aspect of the present invention, there is provided a packed bed type electrochemical water treatment apparatus according to the first or second aspect, wherein a raw water inflow port is provided on a lower side surface of the electrochemical machine, and a treated water outlet is provided. In addition to being provided on the upper side surface of the electrochemical machine, the granular medium replenishing port is provided at the upper end of the electrochemical machine, and the granular medium outlet is provided at the lower end of the electrochemical machine. For this reason, it is possible to prevent the accumulation of the debris of the granular medium and the inflow of the raw water from the raw water inflow port 22 from being blocked. In addition, when the granular medium is consumed by electrochemical erosion, or when impurities in raw water flow out into the inner filling section, the granular medium can be periodically discharged from the granular medium outlet. . at the same time,
By replenishing the washed and regenerated granular medium from the granular medium replenishing port, the electrochemical machine can maintain the maximum efficiency. Furthermore, the granular media outlet is located directly below the electrochemical device, so that the granular media and impurities in the water can be directly eliminated, thereby simplifying the operation.

According to a fourth aspect of the present invention, there is provided the packed bed type electrochemical water treatment apparatus according to any one of the first to third aspects, wherein the raw water advancing port, the treated water outlet, and the granular medium replenishing port are provided. An electric or manual valve is installed in at least one of the granular medium outlet. Therefore, the inflow of raw water, discharge of foreign substances, replenishment and discharge of granular media, and the like can be easily and fully automatically or manually controlled.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a packed-bed type electrochemical water treatment apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 3 and 4, several electrode rods 3 are inserted into the electrochemical machine 2 at equal intervals and annularly. Outside the electrode rod 3 is an insulating sleeve 4. The insulating sleeve 4 is isolated from the granular medium 21 to prevent the electrode rod 3 and the granular medium 21 from directly contacting or short-circuiting. Further, a screw cap 41 is fixed to the lower end of the insulating sleeve 4, and the electrode rod 3 in the insulating sleeve 4 is connected to the electrochemical machine 2.
It is exchangeably fixed inside. Further, a plurality of holes 42 are formed in a peripheral surface of the insulating sleeve 4. For this reason, there is an effect that water flows through the holes 42 to promote the electrolytic action.

As the material of the electric rod 3, stainless steel, graphite, iron, aluminum and the like can be used. As shown in FIG. 6, the electrode rod 3 is connected to a power source such that the plus and minus sides are adjacent to each other. For this reason, a more desirable electric field is formed, and the microcell effect between the granular media 21 can be enhanced. Also, if you want to replace the electrode rod 3 in the electrochemical machine 2,
If the screw lid 41 at the lower end of the insulating sleeve 4 is opened, the electrode rod 3 can be taken out immediately and a new electrode rod 3 can be inserted. That is, the electrode rod 3 can be replaced simply and quickly simply by opening and closing the screw lid 41.

As shown in FIGS. 3 and 5, the electrochemical machine 2 is provided with a raw water inlet 22 at a position outside and near the lower end. A treated water outlet 23 is provided on the upper side surface of the electrochemical machine 2. Raw water is the raw water advancement opening 22
Enters the electrochemical machine 2 and the treated water flows into the treated water outlet 2
3 and reused. Also,
At the upper end of the inner filling section 26 of the electrochemical machine 2, a granular medium replenishing port 24 is provided. In addition, the inner filling section 26
Is provided with a granular medium outlet 25 at the lower end.

The granular medium outlet 25 is provided with an inner filling section 26.
, It can be prevented that the granular medium 21 accumulates and the raw water inflow from the raw water inflow port 22 is blocked. When the granular medium 21 is consumed due to electrochemical erosion, or when impurities in raw water flow out into the internal filling section 26, the granular medium 21 can be periodically discharged from the granular medium outlet 25. . At the same time, washing and
By replenishing the regenerated granular media 21, the electrochemical machine 2 can maintain maximum efficiency. And since the granular medium discharge port 25 is installed directly under the electrochemical device 2, the granular medium 21 and impurities in water can be directly eliminated, and the operation is simple.

Further, by installing the electric or manual valve 5 at an appropriate position of the raw water inflow port 22, the granular medium replenishing port 24 and the granular medium outlet 25,
It is possible to control the inflow of raw water, the discharge of impurities, the replenishment and discharge of the granular medium 21, and the like, fully or manually.
The valve 5 includes a raw water inlet 22, a granular medium replenishing port 24, a treated water outlet 23, and a granular medium outlet 25.
Of these, any one or an arbitrary plurality of combinations may be used.

The number of electrode rods 3 can be adjusted by the dielectric constant of raw water. Further, it is not necessary to adjust the installation interval of the electrode rods 3. The voltage may be appropriately adjusted simply by the dielectric constant of the raw water. Further, the electrodes 3 corresponding to the plus and the minus in the left and right and the front and rear, respectively.
Can be used to form the most desirable electric field.
The microcell effect between the two can be enhanced. In addition, the loading and replenishment of granular media 21 is not affected at all.

In the present invention, the processing efficiency with respect to the inner diameter of the electrochemical machine 2 can be increased. When it is desired to increase the throughput of the electrochemical machines 2, they can be arranged in parallel as shown in FIG. When it is desired to increase the processing efficiency, it is only necessary to increase the length of the main body of the electrochemical machine 2. Further, the electrochemical machine 2 and its parallel arrangement can be installed at any angle other than the upright type and the horizontal type, and do not affect the throughput and effect of the electrochemical machine.

FIG. 8 shows a flow chart of a water treatment system using an embodiment of the packed bed type electrochemical water treatment apparatus.
When the raw water enters the raw water inflow port 22 of the electrochemical machine 2, it enters the rapid mixer E disposed in front of the electrochemical machine 2 and has a pH of
Adjusted. Raw water discharged from the rapid mixer E enters the raw water inlet 22 of the electrochemical machine 2. Raw water is discharged from the treated water outlet 23 through various reactions of the electrochemical machine 2 and enters the high-speed mixer G.

The granular medium 21 of the electrochemical machine 2 is gradually consumed by the electrolytic corrosion action, and at the same time, large granular impurities accumulate below the inner filling section 26. If this is done, it will be clogged, so it is necessary to use the granular medium discharge port 25 to perform the discharge operation in a timely manner. At this time, there is no need to interrupt the water treatment operation. The granular medium 21 can be drained downward and put into the medium washer K. Also,
The granular medium replenishing tank P is controlled by the valve 5.
The granular medium 21 is replenished to the electrochemical machine 2 as appropriate.

[0028]

According to the present invention, the low electric conductivity and the blockage of the sediment discharge port can be improved, and the water treatment efficiency of the electrochemical machine can be increased. Further, by installing the electric rod inside the electrochemical machine, it is possible to change the cross-sectional area and the length of the electrochemical machine, thereby increasing the amount of wastewater treated and the treatment effect. In addition, by installing the granular media outlet just below the electrochemical machine, the granular media does not have the problem of blind spots, can be easily discharged, and the contaminants in the water accumulated between the media together Can be discharged. Further, since the screw cap is provided below the electrode rod, replacement of the electrode rod is easy.

[Brief description of the drawings]

FIG. 1 is a three-dimensional exploded view of a packed-bed type electrochemical water treatment apparatus invented by the present inventors previously.

FIG. 2 is an overall view of a water treatment system using the packed bed type electrochemical water treatment apparatus of FIG.

FIG. 3 is a perspective view of an embodiment of a packed bed type electrochemical water treatment apparatus according to the present invention.

FIG. 4 is an enlarged sectional view of an electrode rod equipped with the insulating sleeve of FIG. 3;

FIG. 5 is a sectional view of the packed-bed type electrochemical water treatment apparatus of FIG.

6 shows a packed bed type electrochemical water treatment apparatus of FIG.
It is sectional drawing seen from the top in the state where the electrode rod was arrange | positioned so that plus and minus may adjoin.

FIG. 7 shows a plurality of packed bed type electrochemical water treatment apparatuses shown in FIG.
It is a figure for explaining the case where it arranges in parallel.

8 is an overall view of a water treatment system using the packed-bed type electrochemical water treatment apparatus of FIG.

[Explanation of symbols]

 2 Electrochemical machine 21 Granular medium 22 Raw water inflow port 23 Treated water outlet 24 Granular medium replenishment port 25 Granular medium discharge port 26 Internal filling section 3 Electrode rod 4 Insulation sleeve 41 Screw cap 42 Hole 5 Valve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/72

Claims (4)

[Claims] 1. A packed-bed type electrochemical water treatment apparatus for converting electrical energy into chemical energy to perform an oxidizing action, a reducing action, an electrolytic corrosion action, an electrical neutralizing action and a flotation operation to treat water. An electrochemical machine having an internal filling section as a hollow interior, a granular medium for purifying water, which is filled in the internal filling section, and installed vertically apart from the electrochemical machine, A raw water inflow port and a treated water outlet; a granular medium replenishing port for replenishing the granular medium in the internal filling section; and a granular medium discharging section for discharging the granular medium filled in the internal filling section. And an outlet, wherein a plurality of electrode rods, each of which is covered with an insulating sleeve, are inserted into the electrochemical machine, and a plurality of holes are provided on a peripheral surface of the insulating sleeve. , Packed bed type electrochemical water treatment equipment. 2. The method according to claim 2, wherein the electrode rod is provided inside the electrochemical machine.
2. The packed-bed type electrochemical water treatment apparatus according to claim 1, wherein the electrodes are arranged in a ring shape as viewed from above, and arranged such that adjacent electrode rods are positive and negative. 3. The raw water inflow port is provided on a lower side surface of the electrochemical machine, the treated water outlet is provided on an upper side surface of the electrochemical machine, and the granular medium replenishment port is provided on the electric machine. The packed bed type electrochemical water treatment apparatus according to claim 1 or 2, wherein the granular medium discharge port is provided at an upper end of a chemical machine and the granular medium outlet is provided at a lower end of the electrochemical machine. 4. The raw water inflow port, the treated water outlet, the granular medium replenishing port and the granular medium discharging port,
The packed bed type electrochemical water treatment apparatus according to any one of claims 1 to 3, wherein an electric or manual valve is installed in at least one of them.