JPH06154510A - Electrode structure in ionic reaction tank and controlling system for electrode - Google Patents

Abstract

PURPOSE:To provide an electrode structure and a controlling system in an ionic reaction tank wherein the electrode structure is practical, easily manufactured and can actuated. CONSTITUTION:Electrode plates 5a, 5b made of aluminum are arranged in unequal intervals and supported on bolsters 10 wherein ringed grooves 11 are cut in round bars. A V-shaped support part 7 for supporting electrode bars 9a, 9b is provided in arms 8 lengthened to the upper parts of the electrode plates 5a, 5b. Changeover of polarity is performed to prevent passivity from being caused in the electrode plates. However a time sufficient to wash away scum is inserted as downtime on the way of changeover.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure in an ion reaction tank and its control system.

[0002]

2. Description of the Related Art Recently, attempts have been made to separate an emulsion of water and oil such as water-soluble cutting oil into water and oil (scum) by electrolytic ion reaction. This is because one flat electrode is installed oppositely in the ion reaction tank, one electrode is set to positive (+) potential, and the other electrode is set to negative (-) potential to neutralize the emulsion and By adding aluminum hydroxide, the neutralizing solution is made to aggregate. Aggregates are called scum and can be dried and solidified for disposal or incineration.

[0003]

However, in the conventional method for treating an emulsion by the electrolytic ionic reaction proposed as described above, although the neutralization and agglutination reactions are academically established, The shape, structure, number, control method, etc. of the electrode plates are unspecified, and even if an ion reaction tank according to the literature is manufactured, it is difficult to manufacture, the reaction efficiency is poor, and the generated scum adheres to the electrode plate and the treatment is There is a problem that it cannot be put to practical use from the viewpoints of production, efficiency, work, etc.

Therefore, an object of the present invention is to improve the electrode structure and its control system particularly in an electrolytic ion reaction tank to efficiently perform neutralization and aggregation treatment.

[0005]

In order to solve the above-mentioned problems, the present invention comprises an electrode structure and its control system in an ion reaction tank as set forth in the claims.

[0006]

In the electrode structure of the ion reaction tank of the present invention,
Since the electrode base material is aluminum, aluminum hydroxide can be naturally generated during neutralization. Moreover, since a plurality of electrode plates are arranged at unequal intervals, neutralization and aggregation can be reliably performed under various different conditions.

Further, each electrode plate is divided into plus (+) and minus (-) groups, and one electrode rod is bridged to each arm extending upward from the ion reaction tank for each group. Easy power connection of electrodes.

Further, since each electrode plate is supported by the pillow member in which the groove is cut on the round bar member at a predetermined pitch, the pillow member can be easily manufactured and the device can be easily assembled.

Further, in the control system of the present invention, since the polarities of the respective group electrodes are alternately switched, the occurrence of passivity can be suppressed as much as possible, and a pause time is given during the switching, so that an overcurrent can be prevented from flowing. Further, when the scum is overflowing from the ion reaction tank, the energization can be started after the scum is removed, and the electrode plate can be efficiently operated always in a clean state.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a perspective view showing an electrode structure according to an embodiment of the present invention, FIG. 2 is a perspective view of a pillow member supporting an electrode plate, and FIG. 3 is an outline of a water / scum separating device used in the embodiment of the present invention. And FIG. 4 is a time chart showing the electrode control method.

First, an outline of the water / scum separating device shown in FIG. 3 will be described.

In the figure, a water / scum separating device 1 of this embodiment is shown.
Is equipped with an introduction side circulation tank 3 that receives water-soluble cutting oil after passing through a centrifugal separator or a filter (not shown) and removing foreign matters such as chips and metal powders through a treatment liquid supply pipe. The bottom of the circulation tank 3 communicates with the bottom of the ion reaction tank 4. A plurality of aluminum electrode plates 5 are erected at appropriate intervals inside the ion reaction tank 4. The arrangement direction of the electrode plates is parallel to the flowing direction 6 of the processing liquid so that the processing liquid introduced from the bottom of the circulation tank 3 flows upward between the electrode plates.

As shown in FIG. 1, the electrode plate 5 has a structure in which it is repeatedly arranged with a relatively short distance d and a larger distance D. Of the pair of electrode plates arranged at a shorter interval d, one is made a positive (+) potential and the other is made a negative (-) potential, and the electrodes are grouped into groups.

An arm 8 having V-shaped electrode supporting portions 7a and 7b which are displaced from each other for each group is provided above each electrode plate, and the V-shaped groove of each electrode rod supporting portion 7a and 7b is provided. Electrode rods 9a and 9b are driven into and fixed to. Therefore, each of the electrode plates 5a and 5b can give potentials of different polarities to the opposing electrode plates 5b or 5a. The supplied potential is about 5 to 15V.

In order to support the electrode plates 5 inside the ion reaction tank 4 at the distance d or D, a grooved pillow 10 shown in FIG. 2 is arranged below each electrode plate 5. The pillow 10 is made of a bakelite round bar and is evenly spaced by a lathe or the like.
The cut groove 11 of FIG. For example, by setting the large interval D to be an integral multiple (for example, three times) of the small interval d, each electrode plate can be fixed in the unequal intervals (double equal intervals) shown in FIG. Since the pillow 10 has a structure in which a bakelite round bar is provided with a kerf, it is easy to manufacture and easy to use. The kerf may be a spiral groove. The effect of the non-equidistant arrangement will be described later.

Referring again to FIG. 3, the ion reaction tank 4 is provided with an overflow portion for overflowing the processing liquid introduced from the circulation tank 3, and the overflow is provided adjacent to the ion reaction tank 4. A scum tank 12 for receiving the processing liquid overflowing from the section is provided. The bottom of the scum tank 12 is the return side circulation tank 13
Connected to the bottom of. The return side circulation tank 13 is connected to the introduction side circulation tank 3 through a circulation pipe 14, and the pipe 14 is provided with a pump 15 for circulating the treatment liquid. A drain valve 16 is provided at the bottom of the ion reaction tank 4.
A scum discharge valve 17 having a relatively large diameter is provided at the bottom of the scum tank 12. The drain valve 16 is for discharging the treated water to the filter device.
The scum discharge valve is for discharging the processed scum to the scum dryer. As shown in the figure, the generated scum has a small specific gravity and floats above the processing liquid. Generally, the scum generated in the scum tank 12 is in the form of grease.

In the water / scum separating device having the above structure,
The treatment liquid is supplied from the supply pipe 2, and the separation treatment of water and scum by the electrolytic ion reaction is started. The treatment liquid is supplied until the ion reaction tank 3 is filled and the water level in the scum tank 12 reaches the suction position of the circulation pipe 14 sufficiently. When the water level in the scum tank 12 becomes appropriate, the valve of the supply pipe 2 is closed.

A DC voltage is supplied to the electrode rod 9, and the pump 15
Is driven, the treatment liquid circulates in the direction of arrow 6, and the charge ion reaction is started between the electrode plates 5a and 5b. The charge ion reaction is to neutralize the emulsion or soluble particles by the electric charge and to agglomerate them by the aluminum hydroxide generated at the same time. The generated scum rises along the flow and accumulates in the upper part of the ion reaction tank 4. At this time, the processing liquid is made to flow by the pump 15 and overflows from the upper part of the ion reaction tank 4 toward the scum tank 12. Therefore, the scum accumulated in the upper part of the ion reaction tank 4 is sent to the scum tank 12 together with the overflow. When the overflow state is observed, a white layer having a thickness of 1 to 3 mm is generated in the ion reaction tank 4 and flows down toward the scum tank 12.
Thus, scum is accumulated in the scum tank 12 from the upper side, and the thickness gradually increases. Therefore, the scum tank 12
Should be sufficient to store the total scum that results when the process liquid is well separated. The isolated water is
It remains in the ion reaction tank 4, a part of the lower part of the scum tank 12, and the circulation tank 13. The scum is a mixture of the oil separated from the treatment liquid and the generated aluminum hydroxide, but it changes into a grease-like or clay-like state due to the relation of the power supply state and the like. By giving a sufficient time of 120 to 180 minutes, it is possible to purify the water separated from the treatment liquid until the standard value by the Water Pollution Control Law can be cleared.

In FIG. 1, the electrode plates 5 are shown in a double equidistant arrangement as an example of unequal intervals, but this is a reaction occurring at a small interval d in the ion reaction tank 4 showing complicated electrolysis and aggregation reaction. This is because by adding a reaction that occurs at a large interval D to the above, the clearing of the standard value of the separated water is further facilitated. That is, by removing components that cannot be removed at different intervals at other intervals, the final component can be brought close to zero, and it can be expected that the overall efficiency is improved. The electrode plate 5 is preferably arranged also on the wall surface of the ion reaction tank 4. This is because the untreated liquid does not overflow through the wall surface.

The water and scum separated as described above can be sent to the filter device and the scum to the drying device by opening the valves 16 and 17. The water discharged from the valve 16 or 17 is sent to a filter device where impurities (mainly scum) are removed and then discharged or recycled. The grease-like scum sent to the drying device is dried here and incinerated.

As shown in FIG. 4, it is preferable that the polarities given to the electrode plates 5a and 5b be alternately switched after an appropriate time T _A. This is to prevent the surface of the electrode plate 5 from being passivated. However, if this switching is performed instantaneously, an overcurrent flows and the power supply device needs to be upsized, so a rest time T ₀ of 5 to 30 minutes is provided at the time of switching. As a result, not only the overcurrent is prevented but also the scum accumulated in the upper part of the ion reaction tank flows into the scum tank 12 and the electrolysis can be started from the state where the treatment liquid is clarified, so that the separation efficiency is increased.

As described above, according to the electrode structure of this embodiment, a plurality of electrode plates are erected and supported on the pillow 10, and the V-shaped electrode supporting portions 7a and 7b support the electrode rods 9a and 9b. So
The electrode assembly work is easy. In addition, since the intervals between the electrode plates supported by the pillow 10 are unequal intervals or double equal intervals, the treatment components can have a wide range, and the BOD or COD value of the separated water can be reduced. You can

In addition, according to the electrode control system of this example, the polarity is switched, and the scum floating on the ion reaction tank 4 is paused for a sufficient period of time during the switching, so that the electrodes are electrolyzed in a clean state. It can be started and the separation efficiency can be improved. In addition, the flow of scum can be smoothed.

In the above-described embodiment, the electrode plates 5 are shown as an example of double equal intervals as an example of non-uniform intervals, but other equality such as triple equal intervals, unequal intervals in which the pitch is changed little by little, etc. It can also be an interval.

The present invention can be applied to a relatively small device such as a device which is disposed near a cutting machine and separates water and scum at night. Further, it can be widely used in a plant that processes a large amount of cutting oil collected from a machine factory.

The present invention is not limited to the above embodiments, but can be carried out in appropriate modes by making appropriate design changes.

[0027]

As described above, since the present invention has the electrode structure in the ion reaction tank as set forth in the claims, it is easy to manufacture and can carry out a highly efficient ionic reaction, and it is practical. An emulsion processing device can be constructed.

Further, according to the electrode control system of the present invention, a pause time is given during the switching of the polarities of the electrodes, so that the generation of passivity can be suppressed, and in the flowing water type emulsion treatment device, the scum is sufficiently drained. With this, electrolysis can be restarted, and efficient separation of water and scum can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electrode structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of a pillow member that supports an electrode plate in the electrode structure.

FIG. 3 is an explanatory sectional view showing the outline of a water / scum separation device.

FIG. 4 is a time chart showing an electrode control system of the present invention.

[Explanation of symbols]

 4 Ion reaction tank 5 Electrode plate 7 Electrode rod support part 8 Arm 9 Electrode rod 10 Pillow 11 Cut groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuaki Kawamata 1253 Nagasaki Omaeyama, Omaeyama Village, Higashi-Ibaraki-gun, Ibaraki 1 Cooperative Omaeyama fusion (72) Inventor Kiyoshi Minagawa 1253 Nagakura, Omaeyama-mura, Ibaraki-gun, Ibaraki Prefecture No. 1 Co-operative Omaeyama Fusion (72) Inventor Toshio Komuro 1253 Nagasaki Omaeyama Village, Higashi-Ibaraki-gun, Ibaraki Prefecture 1253 No. 1 Co-operative Omaeyama Fusion (72) Inventor, Hiroshi Kawakami 1253 Nagama, Omaeyama-mura, Ibaraki-gun, Ibaraki Prefecture Address 1 Co-operative Omaeyama Fusion (72) Inventor Shinpei Aoki 1253 Nagama Omaeyama Village, Higashi-Ibaraki, Ibaraki Prefecture Nagakura 1253 Address 1 Co-operative Omaeyama Fusion, Omayama 1253 Nagasaki, Omaeyama Village, Ibaraki-gun Ibaraki Address No.1 Cooperative Omaeyama Fusion (72) Inventor Toshio Matsui Omayama Village, Omaeyama Village, Higashi-Ibaraki-gun, Ibaraki Pref. 1253 Nagakura Co-operative Omaeyama Fusion (72) Inventor, Kunji Minagawa 1253 Nagasaki Omaeyama, Omaeyama-mura, Higashi-Ibaraki-gun, Ibaraki 1 Co-operative Omaeyama fusion, 72 (Inventor) Sakae Mimura, 1253, Nagakura, Omaeyama-mura, Ibaraki-gun, Ibaraki 1 Cooperative Omaeyama Fusion (72) Inventor Mitsuo Hasuda 1253 Nagasaki Omaeyama Village, Omaeyama Village, Higashi-Ibaraki-gun, Ibaraki 1 Co-operative Omaeyama Fusion Oita (72) Inventor, Kazuo Omori 1253 Nagakura, Omaeyama Village, Ibaraki-gun 1. Cooperative Omaeyama Fusion (72) Inventor, Kazunori Watanabe 1253 Nagaoka, Omaeyama Village, Omaeyama Village, Higashiibaraki-gun, Ibaraki 1 Cooperative Omaeyama Fusion

Claims (4)

[Claims] 1. An electrode structure in an ion reaction tank in which an emulsion of water and oil is neutralized by an electrolytic ionic reaction and an oil component is aggregated by adding aluminum hydroxide, wherein a plurality of aluminum electrode plates are arranged in parallel. Standing in an ion reaction tank, the electrode plates in the parallel arrangement are spaced apart from each other by at least two kinds of distances, and the electrode plates adjacent to each other are given different potentials. An electrode structure in an ion reaction tank characterized by the above. 2. An electrode structure in an ion reaction tank in which an emulsion of water and oil is neutralized by electrolytic ionic reaction, and oil is aggregated by addition of aluminum hydroxide, wherein a plurality of aluminum electrode plates are arranged in parallel. Stand up in the ion reaction chamber and divide each electrode plate into groups of the same polarity to give potentials of different polarities to adjacent electrode plates. An ion reaction characterized in that an arm extending upward from the ion reaction tank is provided, a V-shaped groove for electrode support is provided in each arm, and an electrode rod for each group is supported in each groove provided in each arm. Electrode structure in the tank. 3. An electrode structure in an ion reaction tank in which an emulsion of water and oil is neutralized by electrolytic ionic reaction, and oil is aggregated by addition of aluminum hydroxide, wherein a plurality of aluminum electrode plates are arranged in parallel. An electrode structure in an ion reaction tank, which is provided upright in the ion reaction tank, and each electrode plate in the parallel arrangement is supported in a groove cut at a predetermined pitch on a round bar member. 4. An electrode control system in an ion reaction tank in which an emulsion of water and oil is neutralized by electrolytic ionic reaction, and oil is aggregated by addition of aluminum hydroxide, in which a plurality of aluminum electrode plates are arranged in parallel. Standing in the ion reaction tank, applying potentials of mutually different polarities to adjacent electrode plates, and alternately switching the polarities at appropriate intervals,
An electrode control method in an ion reaction tank, which is characterized by giving a predetermined rest time during switching.