JP3469134B2 - Apparatus and method for removing fine metal particles in emulsion by electrochemical method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to metal fine particles, sludge, and the like contained in a cutting fluid used for cutting and grinding aluminum used as aircraft materials, for example.
The present invention relates to a device and method for removing fine metal particles in an emulsion by an electrochemical method, which removes grease, malodorous components and the like and discharges a clean cutting oil that maintains the properties of the original oil-in-water emulsion.

[0002]

2. Description of the Related Art Conventionally, for example, when a workpiece such as aluminum for an aircraft material, aluminum alloy, etc. is machined into a desired shape by using a cutting machine, cooling of the cutting place,
Cutting fluids are used to add fluidity to cutting operations. For this cutting fluid, the mixing ratio of water and oil is 9
A 5: 5 oil-in-water emulsion is mainly used.

After the cutting process, in order to reuse the oil-in-water emulsion, metal fine particles such as aluminum contained in the oil-in-water emulsion, grease attached to the object to be cut, lubricating oil and the like are removed. Be seen. Conventionally, this removal operation is performed by subjecting an oil-in-water emulsion to centrifugation or passing it through a filter.

[0004]

However, when an oil-in-water emulsion is subjected to centrifugation, the difference in specific gravity between water and metal fine particles, especially aluminum, in the cutting fluid is not so large. Could not be separated. On the other hand, when the oil-in-water emulsion was filtered, large metal fine particles could be collected by the filter, but fine metal fine particles could not be completely removed because they passed through the filter. Therefore, there is a problem that the metal fine particles of the oil-in-water emulsion cannot be removed sufficiently.

Further, when the removal work using the filter is performed, there is a problem that the filter is clogged with the metal fine particles, and maintenance such as cleaning of the filter is required.

The present invention has been made by paying attention to the problems existing in the prior art. The purpose is to remove fine metal particles, sludge, grease, malodorous components, etc. contained in the emulsion to obtain a clean emulsion, which can be reused and maintained. It is an object of the present invention to provide a device and method for removing metal fine particles in an emulsion by an electrochemical method that can simplify the removal work without requiring the above.

[0007]

In order to achieve the above object, a device for removing metal fine particles in an emulsion by an electrochemical method according to a first aspect of the present invention comprises a metal fine particle, sludge, grease, a malodorous component, etc. A container for containing an oil-in-water emulsion containing a supply port for supplying the oil-in-water emulsion is provided, a discharge port for discharging the content liquid is provided at the bottom of the container, and a plurality of anodes are provided in the container. And the cathode are arranged so as to face each other, and a predetermined DC voltage is applied between the anode and the cathode to electrolyze water and metal fine particles existing between the electrodes to generate hydrogen ions and hydroxide ion.
Hydrogen generated from the cathode by generating on and metal ions
And a clean oil-in-water in which metal fine particles, sludge, grease, malodorous components, etc. are floated together with the metal hydroxide generated by the hydroxide ion and the metal ion, and the properties of the oil-in-water emulsion are maintained from the lower outlet It is configured to discharge the type emulsion.

According to the second aspect of the present invention, there is provided an apparatus for removing fine metal particles in an emulsion by the electrochemical method according to the first aspect.
In the invention described in (1), the metal forming the metal fine particles is aluminum, an aluminum alloy, iron or nickel.

According to the third aspect of the present invention, there is provided an apparatus for removing fine metal particles in an emulsion according to the electrochemical method.
Alternatively, in the invention of claim 2, the plurality of anodes and cathodes are each formed in a flat plate shape, and the respective anodes and cathodes are alternately arranged at regular intervals.

An apparatus for removing fine metal particles in an emulsion by an electrochemical method according to a fourth aspect of the present invention is the first aspect.
In the invention according to any one of claims 3 to 3, a liquid of an oil-in-water emulsion in which a discharge pipe is connected to a discharge port provided in a lower portion of the storage container, and a tip of the discharge pipe is stored in the storage container. It is configured to lead to the surface and cause it to overflow.

According to a fifth aspect of the present invention, there is provided a method for removing fine metal particles in an emulsion by an electrochemical method, in which an oil-in-water emulsion containing fine metal particles, sludge, grease, malodorous components and the like is provided in a container. fed into storage container mouth, that are opposed to each other an oil-in-water emulsion in storage container, is circulated between a plurality of anode and cathode predetermined DC voltage is applied, water and gold
The electrolysis of metal microparticles causes hydrogen ions, hydroxide ions and
Hydrogen generated from the cathode by generating metal ions, and the water
Along with metal hydroxide generated by acid ions and metal ions , metal fine particles, sludge, grease, malodorous components, etc. are removed, and a clean outlet is provided at the bottom of the container to maintain the properties of the oil-in-water emulsion. It is designed to discharge an oil-in-water emulsion.

A method for removing fine metal particles in an emulsion by an electrochemical method according to a sixth aspect of the present invention is the fifth aspect.
In the invention described in, the metal fine particles are aluminum, an aluminum alloy, iron or nickel, and the metal hydroxide produced by electrolysis of water is aluminum hydroxide, iron hydroxide or nickel hydroxide.

The method for removing fine metal particles in an emulsion by the electrochemical method according to the seventh aspect of the present invention is the fifth aspect.
Alternatively, in the invention according to claim 6, each of the plurality of anodes and cathodes is formed in a flat plate shape, and the respective anodes and cathodes are alternately arranged at regular intervals.

A method for removing fine metal particles in an emulsion by the electrochemical method according to the eighth aspect is the fifth aspect.
The liquid of oil-in-water emulsion in which the discharge pipe is connected to the discharge port provided in the lower portion of the storage container, and the tip of the discharge pipe is stored in the storage container. It is designed so that a clean oil-in-water emulsion overflows from the tip of the discharge pipe.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. The oil-in-water emulsion is a mixture of water and oil in a ratio of 95: 5. In this embodiment, Cindor 3201 manufactured by Nippon Horton Co., Ltd. is used. It has physical properties such as a hydrogen ion concentration (pH) of 7.2 and a friction coefficient of 0.11, and is used as a coolant when cutting and grinding aluminum and aluminum alloys for aircraft materials. The oil-in-water emulsion after its use contains aluminum pieces, sludge, oil, malodorous components and the like.

As shown in FIGS. 1, 3 and 4, a container 11 made of a metallic material which constitutes a device 10 for removing fine metal particles in an emulsion comprises a pair of short side walls 12 facing each other.
It is formed by a pair of long side walls 13 facing each other and a bottom wall 14 closing the lower end sides thereof, and has a rectangular shape in a plan view and a rectangular box shape with an open top surface. At the opening edges of both short side walls 12, a short extending piece 1 that spreads outward as it goes upward
5 are formed, and long extending pieces 16 extending outward along the short extending pieces 15 are formed at the opening edges of both long side walls 13.

The sprocket 1 is provided at each corner of the long extension piece 16.
7 is rotatably provided by a support shaft 18. A chain 19 is hung between the sprockets 17 of the length-extending pieces 16 facing each other. Both ends of the upper portion of the squeegee 20 are attached to the opposite positions of both chains 19 as a scraping device having a rectangular plate shape. The length of the squeegee 20 is formed to be substantially the same as the width of the short side wall 12. Then, by rotating the sprocket 17 and moving the chain 19, the squeegee 20 can be moved along the opening of the storage container 11 in the length direction of the storage container 11.

As shown by the broken line in FIG. 1 and FIG. 3, a rectangular box-shaped supply part 21 is formed on the outer surface of one of the long side walls 13, and a plurality of long side walls 13 are located inside the supply part 21. Is formed so as to penetrate the long side wall 13. Then, the used oil-in-water emulsion can be injected into the supply unit 21, and the oil-in-water emulsion can be supplied from the supply port 22 to the container 11.

A discharge port 23, which penetrates the long side wall 13 and communicates with the inside of the container 11, is formed in the lower portion of the outer surface of the other long side wall 13. The outlet 23 has a long side wall 13
A discharge pipe 24 extending in the vertical direction is connected. Figure 3
As shown in FIG.
It has the same height as the upper end surface of 1. A rectangular box-shaped receiving portion 25 is formed on the long side wall 13 located substantially in the middle of the discharge pipe 24 so as to cover the outer surface of the discharge pipe 24. A discharge pipe 26 that communicates with the inside of the receiving portion 25 is provided on the outer surface of the receiving portion 25. Then, a clean oil-in-water emulsion that maintains the property before use as the content liquid in the storage container 11 is discharged from the discharge port 23 to the discharge pipe 24, and the content liquid overflowing from the discharge pipe 24 is received by the receiving portion 25. It is supposed to be housed inside.

As shown in FIGS. 2 to 4, a pair of connecting conductors 2 made of a metallic material and having a rectangular columnar shape are provided in the container 11.
7, 27 a are arranged on the bottom wall 14 along the inner side surfaces of the long side walls 13. A power source (not shown) is connected to one connection conductor 27, and the other connection conductor 27a is grounded.

On the pair of connecting conductors 27, 27a, the cathode plate 28 and the anode plate 29 are fixed so that the cathode plate 28 as the cathode and the anode plate 29 as the anode made of graphite are a total of an even number. They are arranged alternately at intervals. One end edge of the lower end of the anode plate 29 is in contact with one connecting conductor 27, and the other end is notched so that the other connecting conductor 2
It is not in contact with 7a. On the other hand, one end edge of the lower end portion of the cathode plate 28 is in contact with the other connecting conductor 27a, and the other end edge is cut out so as not to contact with the one connecting conductor 27a. When a DC voltage is applied from the power source to one of the connecting conductors 27, the anode plate 29 becomes positive and the cathode plate 28 becomes negative. The magnitude of the applied DC voltage depends on the distance between the cathode plate 28 and the anode plate 29, but the electrolysis described later is surely caused to efficiently remove aluminum, sludge, grease, malodorous components and the like. Therefore, it is preferable to set it to 5 V or more.

In addition, through holes (not shown) are formed at four places substantially at the center of all the cathode plates 28 and the anode plates 29, and bolts 31 made of a synthetic resin material are inserted through the through holes. . A nut 32 made of a synthetic resin material is screwed onto the tip of the bolt 31. Also, the cathode plate 2
A cylindrical spacer 33 made of a synthetic resin material is fitted on the outer peripheral surface of the shaft portion of the bolt 31 located between the anode 8 and the anode plate 29. The cathode plate 28 and the anode plate 29 are arranged at a constant interval between them by the spacers 33, and the constant interval between the cathode plate 28 and the anode plate 29 is maintained by the bolts 31 and the nuts 32. It

Portions other than the anode plate 29 and the cathode plate 28, that is, between one short side wall 12 and the anode plate 29 adjacent to the short side wall 12, all the cathode plates 28 and the bottom and bottom walls of the anode plate 29. Between the 14 surfaces and between the other short side wall 12 and the cathode plate 28 adjacent to the short side wall 12, a concave partition wall 34 made of a synthetic resin material is formed substantially at the center of each anode plate 29 and cathode plate 28. It is installed in the position. And the partition wall 34
Thus, the oil-in-water emulsion flows between the cathode plate 28 and the anode plate 29 in the container 11.

Next, a method of using the device 10 for removing fine metal particles in the emulsion will be described. Now, the oil-in-water emulsion used as a coolant at the time of cutting aluminum is injected into the supply part 21, and the oil-in-water emulsion is supplied from the supply port 22 into the accommodation container 11. At this time,
The partition wall 34 provided on the portion other than the anode plate 29 and the cathode plate 28 prevents the oil-in-water emulsion from passing through a portion other than the portion between the cathode plate 28 and the anode plate 29 in the container 11.

Then, a DC voltage (50 V
A current) is applied to one of the connecting conductors 27, and the anode plate 29
Is positively charged and the cathode plate 28 is negatively charged. At this time, the large-sized aluminum pieces settle down due to gravity and are deposited on the bottom wall 14.

An oil-in-water emulsion flows between the cathode plate 28 and the anode plate 29. Then, water is electrolyzed to generate hydrogen ions (H ⁺ ) and move to the cathode plate 28, and hydroxide ions (OH ⁻ ) are generated to move to the anode plate 29. Then, fine aluminum that does not settle out is uniformly dispersed and dissolved in the content liquid, and aluminum ions (A
exist as l ³⁺ ).

Next, as shown in FIG. 4, hydrogen molecules (H ₂ ) are generated from the cathode plate 28 to raise the oil-in-water emulsion as minute bubbles, and the ascending flow of the content liquid due to the rise of the hydrogen molecules. Occurs. Then, the hydroxide ions rise in the ascending current. At the same time, aluminum hydroxide {Al (OH) ₃ } is produced as metal hydroxide by combining with dissolved aluminum ions. Since the aluminum hydroxide has a glue-like property, it adheres to ascending hydrogen molecules, and further, sludge and grease contained in the oil-in-water emulsion adhere to the aluminum hydroxide. As a result, sludge, grease and the like adhere to the rising hydrogen molecules via aluminum hydroxide and are carried to the liquid surface. As a result, fine aluminum floats on the liquid surface as aluminum hydroxide, and sludge, grease, malodorous components, etc. float on the liquid surface together with aluminum hydroxide and hydrogen molecules.

Therefore, aluminum, sludge, grease, malodorous components, etc. are removed from the oil-in-water emulsion after use to produce a clean oil-in-water emulsion. Further, since aluminum hydroxide is produced by the hydroxide ion and the aluminum ion, the hydroxide ion hardly remains in the oil-in-water emulsion, and the pH of the oil-in-water emulsion is prevented from shifting to acidic.

Next, the oil-in-water emulsion is continuously supplied into the container 11 through the supply port 22. Then, the clean oil-in-water emulsion is discharged from the discharge port 23 to the discharge pipe 24.
Is discharged to. Further, the discharge pipe 24 allows the storage container 11
The liquid is guided to the same height as the liquid level inside, and is discharged from the discharge pipe 24 by overflow. The clean oil-in-water emulsion is stored in the receiving portion 25, and the discharge pipe 2
6 is collected in a container (not shown). Therefore, a clean oil-in-water emulsion that retains the properties before use is recovered.

Next, the sprocket 17 is rotated and the chain 19 is moved to move the squeegee 20 on the liquid surface. Then, with the squeegee 20,
As shown in, aluminum hydroxide floating above the liquid surface,
The suspended matter 35 such as sludge and grease is scraped off and collected. Finally, after the work is completed, the bottom wall 1 of the storage container 11 is
Remove the aluminum pieces deposited on 4. In the present embodiment, removal of aluminum of 100 mesh (100 μm) or less is targeted.

The effects exerted by the above embodiment will be described below. When the oil-in-water emulsion flows between the cathode plate 28 and the anode plate 29, hydrogen molecules (H ₂ ) are generated as bubbles from the cathode plate 28 and rise, and an ascending flow due to the rise of the hydrogen molecules is generated in the content liquid. Occur. Then, aluminum hydroxide in which hydroxide ions and aluminum ions are bonded adheres to the bubbles of hydrogen molecules and floats on the liquid surface. Further, sludge and grease contained in the oil-in-water emulsion adhere to the aluminum hydroxide and are carried to the liquid surface. as a result,
Fine aluminum, sludge, grease, malodorous components, etc. are removed to produce a clean oil-in-water emulsion which retains its properties before use and can be reused.

It is possible to remove fine aluminum and the like contained in the oil-in-water emulsion by a method utilizing electrolysis. Therefore, unlike the case of removing fine aluminum etc. using a filter, maintenance such as cleaning clogging of the filter after the work is not required, and the work of removing fine aluminum etc. can be simplified. You can

When the oil-in-water emulsion flows between the cathode plate 28 and the anode plate 29, hydroxide ions are generated in the anode plate 29, and the hydroxide ions combine with dissolved aluminum ions to form aluminum hydroxide. Therefore, hydroxide ions hardly remain in the oil-in-water emulsion, and the pH of the oil-in-water emulsion is prevented from shifting to acidic. Therefore, when the oil-in-water emulsion is reused,
It is possible to prevent the work piece from being rusted and having an adverse effect.

Since aluminum hydroxide produced by aluminum ions and hydroxide ions has adhesiveness, it is attached to bubbles of hydrogen molecules, and grease, sludge, malodorous components, etc. can be attached as they float. .

Since the anode plates 29 and the cathode plates 28 are alternately arranged, the oil-in-water emulsion flowing between them is electrolyzed. Therefore, hydrogen and aluminum hydroxide can be surely produced to obtain a clean oil-in-water emulsion.

The anode plate 29 and the cathode plate 28 are arranged at regular intervals with a spacer 33 interposed therebetween. Therefore, the amount of the oil-in-water emulsion flowing in can be made uniform and the reaction can be carried out uniformly.

The clean oil-in-water emulsion is guided from the discharge port 23 to the liquid surface by the discharge pipe 24, overflows, and is stored in the receiving portion 25. Therefore, it is possible to reduce the cost of the removing device 10 without requiring a device or the like for pumping a clean oil-in-water emulsion with a pump. Further, by continuously supplying the used oil-in-water emulsion from the supply port 22, a clean oil-in-water emulsion can be continuously collected from the discharge pipe 24.

Since the partition wall 34 is installed in a portion other than the anode plate 29 and the cathode plate 28, the oil-in-water emulsion is prevented from passing through a portion other than between the cathode plate 28 and the anode plate 29. It Therefore, it is possible to prevent the oil-in-water emulsion from which aluminum, sludge, grease, malodorous components, etc. have not been removed, from being discharged from the discharge port 23.

The squeegee 2 is provided at the opening of the container 11.
0 is provided so as to be movable in the length direction of the container 11 along the liquid surface. Therefore, aluminum, sludge, grease, etc. floating on the liquid surface can be scraped off and removed.

The cathode plate 28 and the anode plate 29 are formed in a flat plate shape. Therefore, the contact area with the oil-in-water emulsion becomes large, and the efficiency of removing aluminum, sludge, grease, malodorous components, etc. can be improved as compared with the case where the cathode plate 28 and the anode plate 29 are rod-shaped or the like.

· For example, 88 cm³After using in a cell
Inject the oil-in-water emulsion of the
When electrolysis is performed with the anode and cathode
Removes all of the Ni and sludge, leaving almost no grease
Was removed. On the other hand, 88 cm ³Underwater after use in the cell
Inject the oil emulsion and inject nitric acid into the cell.
Removes all aluminum and sludge
However, almost no grease was removed. Well
In addition, when hydrogen peroxide is injected instead of nitric acid and reacted,
Aluminum and sludge were mostly removed, but
Little grease was removed. Therefore, electricity
How to remove aluminum, sludge, grease, etc. by solution
The method uses aluminum, sludge, and
It was shown that the removal efficiency of oil and grease was high.

The embodiment can be modified and embodied as follows. In the present embodiment, the removing device 10 is used for removing aluminum and the like in the oil-in-water emulsion used when cutting aluminum, but when cutting and grinding a metal such as an aluminum alloy, iron and nickel. The removing device 10 may be used when removing the aluminum alloy, iron, nickel, etc. in the used oil-in-water emulsion. Also in this case, iron, nickel, etc. in the oil-in-water emulsion rise as iron hydroxide or nickel hydroxide along with hydrogen molecules on the liquid surface and can be easily removed.

The discharge pipe 24 may be omitted. With this configuration, a clean oil-in-water emulsion can be collected from the outlet 23. The anode plate 29 and the cathode plate 28 may be changed into a columnar shape or the like.

・ Anode plate 29 and cathode plate 28 are made of lead oxide,
It may be formed of carbon felt or carbon wool. Further, when the aluminum concentration in the oil-in-water emulsion is low, the anode plate 29 and the cathode plate 28 formed of a metal such as titanium or stainless steel may be used.

The spacer 33 or the bolt 31, the nut 32 and the spacer 33 may be omitted.・ Sprocket 17, chain 19 and squeegee 20
May be omitted. Then, the aluminum, sludge, and the like which are blown from one short extension piece 15 side to float on the liquid surface,
You may collect grease etc. on the other short extension piece 15 side, and collect them.

The partition 34 may be omitted. further,
The technical ideas that can be understood from the above embodiment will be described below. A metal in the emulsion by an electrochemical method according to any one of claims 1 to 4, wherein a partition is provided in a portion other than between the anode and the cathode so that the oil-in-water emulsion flows between the anode and the cathode. Fine particle removal device.

In the case of such a constitution, the oil-in-water emulsion is prevented from passing through a portion other than between the cathode and the anode, and metal fine particles, sludge, grease, malodorous components, etc. are not removed. It is possible to prevent the emulsion from being discharged from the discharge port.

A scraping device for scraping off metal fine particles, sludge, grease, etc. that has moved above the liquid surface and floated above the liquid surface is provided at the upper end of the storage container. An apparatus for removing fine metal particles in an emulsion by the electrochemical method according to any one of 1.

With this structure, metal fine particles, sludge, grease, etc. floating on the liquid surface can be scraped off and easily removed. A partition is provided in a portion other than between the anode and the cathode so that the oil-in-water emulsion flows between the anode and the cathode. The emulsion in the electrochemical system according to any one of claims 5 to 8. Method for removing fine metal particles.

In the case of such a constitution, the oil-in-water emulsion is prevented from passing through a portion other than between the cathode and the anode, and metal fine particles, sludge, grease, malodorous components, etc. are not removed. It is possible to prevent the emulsion from being discharged from the discharge port.

The scraping device provided at the upper end of the storage container is moved along the liquid surface to scrape off metal fine particles, sludge, grease, etc. floating on the water surface. The method for removing fine metal particles in an emulsion by the electrochemical method described in 1.

With this structure, metal fine particles, sludge, grease, etc. floating on the liquid surface can be scraped off and easily removed.

[0053]

As described in detail above, the present invention has the following effects. According to the apparatus for removing metal fine particles in an emulsion by the electrochemical method of the invention according to claim 1, the metal fine particles contained in the emulsion,
Sludge, grease, malodorous components, etc. can be removed to obtain a clean emulsion, the emulsion can be reused, and maintenance can be simplified without requiring maintenance. it can.

According to the apparatus for removing fine metal particles in an emulsion by the electrochemical method of the invention described in claim 2, in addition to the effect of the invention described in claim 1, aluminum hydroxide, iron hydroxide or hydroxide is added. Since nickel can be generated and they have adhesiveness, they can be attached to rising hydrogen molecules, and further, grease, sludge, malodorous components, etc. can be attached and floated.

According to the apparatus for removing fine metal particles in an emulsion by the electrochemical method of the third aspect of the invention, in addition to the effect of the invention of the first aspect or the second aspect, the anode and the cathode are constant. Since they are arranged at intervals, the amount of the oil-in-water emulsion flowing in can be made uniform and the reaction can be carried out uniformly. In addition, since the cathode and the anode are formed in a flat plate shape, the contact area with the oil-in-water emulsion becomes large, and the removal efficiency of metal fine particles, sludge, grease, malodorous components, etc. can be improved.

According to the apparatus for removing fine metal particles in an emulsion by the electrochemical method of the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, By continuously supplying the oil-in-water emulsion after use, clean oil-in-water emulsion can be continuously collected from the outlet. In addition, a device for pumping a clean oil-in-water emulsion by a pump or the like is not required, and the cost of the removing device can be reduced.

According to the method for removing metal fine particles in an emulsion by the electrochemical method of the fifth aspect of the present invention, the metal fine particles, sludge, grease, malodorous components, etc., contained in the emulsion are removed to obtain before use. A clean emulsion with retained properties can be obtained and the emulsion made reusable.

According to the method of removing metal fine particles in an emulsion by the electrochemical method of the invention described in claim 6, in addition to the effect of the invention described in claim 5, aluminum hydroxide, iron hydroxide or hydroxide is added. Since nickel can be generated and they have adhesiveness, they can be attached to rising hydrogen molecules, and further, grease, sludge, malodorous components, etc. can be attached and floated.

According to the method of removing fine metal particles in an emulsion by the electrochemical method of the invention described in claim 7, in addition to the effect of the invention described in claim 5 or 6, the anode and the cathode are kept constant. Since they are arranged at intervals, the amount of the oil-in-water emulsion flowing in can be made uniform and the reaction can be carried out uniformly. In addition, since the cathode and the anode are formed in a flat plate shape, the contact area with the oil-in-water emulsion becomes large, and the removal efficiency of metal fine particles, sludge, grease, malodorous components, etc. can be improved.

According to the method of removing fine metal particles in an emulsion by the electrochemical method of the invention described in claim 8, in addition to the effect of the invention described in any one of claims 5 to 7, By continuously supplying the oil-in-water emulsion after use, clean oil-in-water emulsion can be continuously collected from the outlet.

[Brief description of drawings]

FIG. 1 is a perspective view showing a container of a removing device according to an embodiment.

FIG. 2 is a perspective view showing the inside of a storage container of the removing device according to the embodiment.

FIG. 3 is a cross-sectional view showing the removing device according to the embodiment.

FIG. 4 is a cross-sectional view showing the removing device according to the embodiment.

[Explanation of symbols]

10 ... Device for removing fine metal particles in emulsion, 11 ...
Storage container, 22 ... Supply port, 23 ... Discharge port, 24 ... Discharge pipe, 28 ... Cathode plate as cathode, 29 ... Anode plate as anode.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI C02F 1/465 (72) Inventor Yukio Enomoto 5th-10th address, Koa-cho, Suhara, Kakamigahara City, Gifu Prefecture Enomoto Industry Co., Ltd. (72) Inventor Toshiaki Yamamoto 4-106 Daiyasha, 23 Onoshiba-cho, Sakai City, Osaka Prefecture Inventor Young Chen Lu United States 07041 Milburn Rector Street, New Jersey 43 (56) Reference JP-A-6-154509 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B01D 17/06 501 B23Q 11/00 B23Q 11/10 C10M 175/00 C02F 1/465

Claims (8)

(57) [Claims] 1. A container for accommodating an oil-in-water emulsion containing metal fine particles, sludge, grease, a malodorous component, etc., is provided with a supply port for supplying the oil-in-water emulsion, and the content liquid is provided below the container. A discharge port for discharging is provided, and a plurality of anodes and cathodes are arranged in the container so as to face each other, and a predetermined DC voltage is applied between each anode and cathode, and water and metal fine particles existing between both electrodes By electrolyzing hydrogen ions, hydroxide ions and metal ions
Generated hydrogen generated from the cathode, the hydroxide ion and
With the metal hydroxide generated by metal ions , metal fine particles, sludge, grease, malodorous components, etc. are floated up, and a clean oil-in-water emulsion that maintains the properties of the oil-in-water emulsion is discharged from the lower outlet. A device for removing fine metal particles in emulsion by the configured electrochemical method. 2. The apparatus for removing metal fine particles in an emulsion by an electrochemical method according to claim 1, wherein the metal constituting the metal fine particles is aluminum, an aluminum alloy, iron or nickel. 3. The emulsion in the electrochemical method according to claim 1, wherein the plurality of anodes and cathodes are each formed in a flat plate shape, and the anodes and cathodes are alternately arranged at regular intervals. A device for removing fine metal particles. 4. A discharge pipe is connected to a discharge port provided in a lower portion of the storage container, and a tip of the discharge pipe is guided to the liquid surface of the oil-in-water emulsion stored in the storage container to cause overflow. An apparatus for removing fine metal particles in an emulsion by the electrochemical method according to any one of claims 1 to 3, which is configured. 5. An oil-in-water emulsion containing metal fine particles, sludge, grease, a malodorous component, etc. is supplied into the container through a supply port provided in the container, and the oil-in-water emulsion is mutually contained in the container. Hydrogen is circulated between a plurality of anodes and cathodes, which are arranged so as to face each other and to which a predetermined DC voltage is applied, by electrolysis of water and metal fine particles.
Hydrogen generated from the cathode by generating ions , hydroxide ions and metal ions, and metal fine particles, sludge, together with the metal hydroxide generated by the hydroxide ions and metal ions .
Metals in the emulsion by an electrochemical method, which removes grease, malodorous components, etc., and discharges a clean oil-in-water emulsion maintaining the properties of the oil-in-water emulsion from the discharge port provided at the bottom of the container. Method of removing fine particles. 6. The metal fine particle is aluminum, an aluminum alloy, iron or nickel, and the metal hydroxide produced by electrolysis of water is aluminum hydroxide, iron hydroxide or nickel hydroxide. Method for removing fine metal particles in emulsion by electrochemical method. 7. The emulsion according to claim 5 or 6, wherein each of the plurality of anodes and cathodes is formed in a flat plate shape, and the anodes and cathodes are alternately arranged at regular intervals. Method for removing fine metal particles. 8. A clean oil-in-water is provided by connecting a discharge pipe to a discharge port provided at a lower portion of the storage container, and leading a tip of the discharge pipe to a liquid surface of an oil-in-water emulsion stored in the storage container. The method for removing fine metal particles in an emulsion by an electrochemical method according to any one of claims 5 to 7, wherein the type emulsion is allowed to overflow from a tip of a discharge pipe.