JPH06328081A - Multicylindrical electrode electrolytic cohesion device - Google Patents

Abstract

PURPOSE:To separate and remove accurately even by means of a simple filter adsorption material by performing the charged neutralization of colloid particles and suspension particles dispersed in electrolyte by means of ions, carrying out the cohesion of ions by means of crosslinking action of an insoluble hydroxide and van der Waals force and agglomerating the ions by the agitating force by means of floating flow of oxygen and hydrogen foams. CONSTITUTION:Graphite cathode cylinders 3 of physical and chemical stability and anode cylinders 4a and 4b of aluminum, iron or the like having the charged neutralization and crosslinking action combinedly and generating cations are set on an insulated ring 6 with a replenishing liquid opening 5 in a liquid tank 1. Therefore, the cohesion of fine particles and oil content in service water, sewage, and cutting liquid and washing liquid for a machine tool is carried out to make the filter adsorption easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to suspensions, colloidal components contained in tap water, sewage, etc., oils and sludges in water-based cleaning liquids, and emulsified oils and fine particles in water-soluble cutting liquids. Impurities that disperse and cause problems are stirred by hydrogen and oxygen bubbles generated by electrolysis, charge neutralization of cations by electrolysis, and sometimes aggregated and agglomerated by insoluble hydroxide from the anode that performs a crosslinking action. The present invention relates to a multi-cylindrical electrode electrolytic aggregating device which is floated and facilitates filtration adsorption separation.

[0002]

2. Description of the Related Art Conventionally, solid-liquid separation in water and sewage has been problematic because it requires a vast facility area and processing time. Also,
There was no simple means to effectively remove the emulsified and suspended oil and sludge in the water-based cleaning liquid and to use them in a circulating manner. Furthermore,
There was no means to separate and remove the cutting oil from the waste fluid of the cutting fluid containing the emulsified liquid, which is commonly called "emulsion", and to discharge only the water as it is. Furthermore, there is no one that can effectively and quickly separate and remove white turbidity, emulsified oil, and sludge that diffuses and suspends by being mixed in a cleaning liquid used in an aqueous washer, and only water can be discharged as it is.

Therefore, the applicant of the present invention compresses and fills an anti-hair-finished product such as a non-woven fabric made of a chemically synthetic fiber having no water absorption property such as polypropylene or polyethylene, and disperses the oil film on the liquid surface or the emulsified oil component. It was proposed to remove and separate fine particles. However, unlike the coarse suspension, the oil and particles that have been reduced to the colloidal region have a problem that they cannot be filtered and adsorbed as they are.

[0004]

That is, the electrolytic aggregating apparatus of the present invention is an electrolytic device comprising an insoluble material for the cathode and an ionizable material for the anode in a liquid tank such as a washing machine. Provided, the negatively charged colloidal components dispersed in the liquid are charged and neutralized by positively charged ions from the anode, enabling aggregation and flocculation by the force of Van der Waals, and by hydrogen bubbles from the cathode. By generating floating convection in the entire liquid tank, and by the cross-linking action of insoluble hydroxide that occurs at the same time, micro flocs of several tens of microns collide with each other to agglomerate to several hundreds of microns or more. The feature is that solid-liquid separation and oil-water separation can be performed with high accuracy by filtration and adsorption.

In the present invention, the cathode material is placed in a device such as tap water, sewage treatment, a washing machine, etc.
Material that is physically and chemically stable and has conductivity
The anode has conductivity, and each is made into a cylindrical shape by a material that generates positively charged ions when electrolysis is energized.Double anodes are installed inside and outside with the cathode sandwiched, which should be removed from the electrolyte solution, colloid Charge and neutralize the negative charge of components and suspension components,
It is intended to provide an electrolytic aggregating device capable of forming flocs by being coupled by a Van der Waals force.

Another object of the present invention is to use aluminum, iron, copper, zinc or the like in the double cylindrical anode,
It is an object of the present invention to provide an electrolytic coagulation device capable of obtaining positively charged hydroxide polymer polyvalent ions that work most effectively for charge neutralization.

Another object of the present invention is to:
Provided is an electrolytic flocculation device capable of reinforcing floc formation by using a material having a cross-linking action by insoluble hydroxide at the same time as charge neutralization by ions during electrolysis such as aluminum and iron in a double cylindrical anode. .

Still another object of the present invention is to effectively and promptly agglomerate micro flocs by strong floating and stirring convection, so that the cylindrical cathode has a replenishment port from the liquid layer at the bottom. The double-cylindrical anode that is open and confronts both sides has multiple openings around the entire circumference that are submerged in the liquid to enable circulation and convection of the liquid and liquid layers inside the inner cylinder. The present invention provides an electrolytic flocculation device capable of flocculating and aggregating oil components by levitation convection of oxygen gas from, and further aggregating floc of particles due to charge neutralization of positively charged ions from the anode.

[0009]

That is, according to the electrolytic coagulation apparatus of the present invention, the cathode is formed of a physically and chemically stable material in a liquid tank in which colloid, particles with a suspension diameter, and oil are dispersedly present. However, the anode is electrically conductive, generates positively charged ions during electrolysis, neutralizes the charge of the dispersed components, and is composed of a material that can be simultaneously aggregated and crosslinked by insoluble hydroxide that occurs at the same time, It is characterized in that the removed substance dispersed in the liquid tank is agglomerated and easily separated.

[0010]

Next, examples of the electrolysis apparatus of the present invention will be described in detail below.

In the figure, reference numeral 1 indicates graphite as a cathode material in a liquid tank.
FIG. 3 is a perspective cross-sectional view showing the configuration of an electrolytic aggregating apparatus that is formed and installed in a cylinder using aluminum as the anode material.

In FIG. 1, the liquid tank 1 is constructed by cutting a PVC pipe, which is an insulator, into slices, and also by welding a PVC plate to the insulating plate 2 at the bottom. The physically and chemically stable graphite cathode cylinder 3, the outer aluminum anode cylinder 4a, and the inner 4b were used as electrodes. An insulating ring 6 having a replenishing liquid opening 5 is provided below the graphite cathode cylinder 3 to insulate the aluminum bottom plate electrode 7 having a full inner diameter, which is placed on the insulating plate 2 forming the bottom of the liquid tank 1. ing. On the other hand, the aluminum anode cylinders 4a, 4b are in full contact with the aluminum bottom plate electrode 7,
Providing a thick flange 8 fitted to the inner diameter of the insulating ring 6,
It is fixed to the aluminum bottom plate electrode 7 with a bolt or the like not shown. A large number of circulation openings 9 are provided around the entire circumference of the aluminum anode cylinders 4a and 4b to facilitate circulation of the liquid in the aluminum anode cylinder 4b and the liquid in the entire liquid tank 1. On the outer peripheral portion of the liquid layer 1, a raw liquid inlet 10 from another device (not shown), a purified liquid outlet 11, and a scum 12 that has flocculated and floated.
The scum discharge port 13 is provided. The gantry 14 is for height determination in order to define electrical insulation from the installation surface.

Next, the principle of agglomeration in this apparatus will be described with reference to the schematic diagram of FIG.
5 is connected, the aluminum anode cylinders 4a and 4b attached in contact with the
It becomes the plus pole 15. A negative electrode 17 is connected to the outer graphite cathode cylinder 3 from outside the liquid surface 16. Aluminum anode cylinder 4 when electrolyzing and electrolyzing in a liquid in which colloidal components, suspension components, etc. (not shown) are dispersed
a, 4b, the aluminum bottom electrode 7, and the flange 8, the trivalent simple ion (Al 3+) 18a and the pH of 4 in the strongly acidic state.
In the vicinity of ~ 5, it binds to hydroxyl ions (OH-) in water,
Positively charged soluble polymer ion [Al8 (OH) 4 + / 20]
18b is generated, and usually has a function of neutralizing the charges of the negatively charged colloid and the suspension component. As a result, the fine particles can be bonded to each other by Van der Waals forces. Furthermore, aluminum, iron and other hydroxides are effective materials because they have a neutralizing effect and at the same time have a cross-linking action that further enhances the bond by Van der Waals. Furthermore, by energizing, the minute bubbles of hydrogen gas on the cathode side and oxygen gas on the anode side, which are generated from the opposite electrode surfaces directly facing each other, become an upward flow from the bottom side, not only floating the flocs, but also causing mutual collision of agglomerated particles. Repeatedly creates a complex effect that greatly advances the agglomeration.

The principle of electrolytic aggregation in FIG. 2 will be described in detail.
Positively charged multiply charged ions of aluminum (Al
3+) 18a or polymer ion [Al 8 (OH) 4 + / 2
[0] occurs, the dispersed particles (not shown) are neutralized by charge, and further, the white gelled aluminum hydroxide (not shown) functions as a bridge, and at the same time, hydrogen gas 19 and oxygen generated from the polar surface are generated. As the gas 20 rises, the particles whose surface potential is near the isoelectric point float while forming flocs and agglomerates, and become the scum 12. As a result, a new stock solution from the outside is introduced from the replenisher opening 5, and the same steps are performed. In the illustrated embodiment, the graphite cathode cylinder 3 is 120 mm
Diameter, aluminum anode cylinder 4a is 140mm, 4b
Is a cylinder having a diameter of 100 mm, and in order to prevent the liquid from staying in the aluminum anode cylinder 4a and to circulate the entire liquid tank 1, a number of circulation openings 9 having a diameter of 8 mm are provided in the aluminum anode cylinders 4a and 4b by punching. There is. still,
If the electrolysis apparatus becomes large and the amount of gas generated increases, there is a danger of explosion. Therefore, it is necessary to dilute the electrolysis apparatus with a large amount of air so that the concentration is below the dangerous point, and completely discharge it to the outside with a duct.

In the actual electrolysis, the current value changes depending on the degree of electrolysis of the sample.
The constant voltage of V was used, and the current value was determined depending on the sample. However, in consideration of safety, the current density was set within the range of 10 A / dm ² . With a general cleaning agent used in water-based cleaners and a waste liquid containing colloidal components, the electrolysis is high, so a maximum current can be passed, and the graphite cathode cylinder 3 and the aluminum anode cylinders 4a, 4b can be supplied. It was confirmed that hydrogen bubbles generated enough to raise the liquid surface from the inner and outer walls, and a few seconds later, the scums that had agglomerated in millimeters suddenly rose one after another and floated on the water surface. Meanwhile, on the cathode side, countless flocs stirred in hydrogen bubbles were also confirmed.

The cathode is made of a material such as carbonaceous material which is physically and chemically stable and is different from the material of the anode.
It is also possible to use the same material as the anode and the same kind of material, and it is also possible to appropriately switch the anode and cathode to make the elution amount uniform on both electrodes. Further, when it becomes a cathode, it has an effect of cleaning the pole surface by the cleaning effect of hydrogen gas.

Next, according to the embodiment of FIG. 1, electrolytic coagulation was actually carried out, and then a polypropylene filter cloth having a thickness of 1 mm was used.
After filtration by stacking, the oil was analyzed by the normal hexane method. Table 1 shows that it contained a considerable amount of surfactant, the oil content was emulsified, and did not sediment even after a lapse of time. Originally, it was difficult to separate and remove by mechanical operation alone, and positively charged ions It was confirmed that the purpose could be achieved with extremely high accuracy by the electrolytic coagulation method utilizing generation of insoluble hydroxide.

[0018]

[Table 1]

[0019]

As described above, according to the present invention, a multi-cylinder is composed of a cathode material which is physically and chemically stable and conductive, and an anode material which is conductive and produces positively charged ions during electrolysis. It is possible to generate positively charged ions by electrolysis, neutralize negatively charged colloids, suspension components, etc., and agglomerate dispersed particles by the force of Van der Waals. Have a real profit that can be done.

Further, according to the present invention, by using aluminum, iron, copper, zinc or the like for the double-cylindrical anode material, positively charged hydroxide polymer polyvalent ions are generated to charge the negatively charged particles. It has the practical benefit of allowing neutralization to work most effectively.

Furthermore, according to the present invention, the double cylindrical anode is made of a material capable of simultaneously performing charge neutralization and cross-linking such as aluminum and iron,
It has the practical benefit of being able to reinforce the van der Waals bond and promote flocking.

Furthermore, according to the present invention, the strong flotation force of the fine bubbles of hydrogen and oxygen from the surface of the multi-cylindrical cathode and the anode facing each other directly stirs the micro flocs to promote the agglomeration. Have the real benefit of being able to

Furthermore, according to the present invention, an opening is provided in the lower portion of the cylindrical cathode to facilitate guiding the stock solution for replenishment by the floating upstream, and it is possible to convect the entire liquid tank.

By providing a large number of inner liquid circulation openings in the double-cylindrical anode, the inner cylinder side liquid can be smoothly aggregated.

The same material is used for the anode and cathode,
By switching the shade and anode appropriately, the amount of elution and abrasion at the anode can be reduced and the life can be extended.

The same material is used for the anode and cathode,
By appropriately switching the cathode and anode, there is a practical advantage that hydrogen gas generated at the time of the cathode can clean the electrode surface and keep the cleaning.

[Brief description of drawings]

FIG. 1 is a perspective cross-sectional view including a partial cross-section for explaining an electrolytic aggregating apparatus of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating aggregation and agglomeration of the present invention.

[Explanation of symbols]

 1. Liquid tank 2. Insulation plate 3. Graphite cathode cylinder 4a, 4b Aluminum anode cylinder 5. Replenisher opening 6. Insulation ring 7. Aluminum bottom plate electrode 8. Flange 9. Circulation opening 10. Stock solution inlet 11. Purification liquid outlet 12. Scum 13. Scum outlet 14. Stand 15. Positive pole 16. Liquid level 17． Negative poles 18a, 18b Positively charged ions 19. Hydrogen gas 20. Oxygen gas

Claims (9)

[Claims] 1. A cathode is formed in a cylindrical shape from a material that is physically and chemically stable and electrically conductive, and the anode has an electrically conductive material that generates positively charged ions during electrolysis. By constructing a double cylinder into a negative electrode, the negatively charged colloidal components dispersed in the electrolyte solution, and the suspended components are neutralized by positively charged ions generated by electrolysis to disperse the dispersed particles into a fan. A multi-cylinder electrode electrolytic aggregating device characterized by facilitating filtration and adsorption by aggregation due to the force of Der Vars. 2. By using aluminum, iron or the like as a double-cylindrical anode material sandwiching a cathode, positively charged polyvalent simple ions are produced under strongly acidic conditions, and positively charged water is produced at around pH 4-5. 2. The multi-cylindrical electrode electrolytic aggregating apparatus according to claim 1, wherein oxidized polymer ions are generated and charge neutralization is made efficient. 3. Bonding of particles to each other by forming a double-cylindrical anode inside and outside the cathode from a material having both charge neutralization power by cations such as aluminum and iron and crosslinking action by insoluble hydroxide. The multi-cylindrical electrode electrolytic aggregating apparatus according to claim 1, wherein the force is increased and the flocculating force is improved. 4. A multi-cylindrical electrode electrolytic aggregating apparatus, characterized in that the material forming the cathode is carbon, graphite, carbon fiber or carbon composite material. 5. An anode is formed in a double cylinder shape with a cathode sandwiched therebetween, whereby hydrogen and oxygen bubbles are efficiently generated, an upward flow of bubbles is formed in a cylindrical gap, and flocculation of particles is promoted. The multi-cylindrical electrode electrolytic aggregating apparatus according to claim 1, wherein a stirring force can be used. 6. The double-cylindrical structure of the anode with the cathode sandwiched between the anode and the cathode so that the anode and the cathode are directly opposed to each other, and the amount of cations and the amount of hydrogen gas to be eluted can be prevented from becoming insufficient. The multi-cylindrical electrode electrolytic aggregating apparatus according to claim 1, characterized in that. 7. Anode and cathode are made of the same material such as aluminum and iron, and cations and insoluble hydroxide are produced on the anode side, and colloids and suspension components dispersed in the liquid are charged. A multi-cylindrical electrode electrolytic aggregating device characterized by being capable of aggregating and agglomerating by neutralizing and cross-linking actions. 8. The multi-cylindrical electrode electrolytic aggregating apparatus according to claim 1, wherein a plurality of openings are provided on the circumferential surfaces of the cylindrically shaped cathode and anode to facilitate convection. 9. The multi-cylindrical electrode electrolytic aggregating apparatus according to claim 1, wherein the cathode and the anode are formed in a plurality of cylindrical shapes.