KR101533416B1 - Apparatus for generating zinc ion and pipe comprising the same - Google Patents

Abstract

The present invention relates to an electrostatic fluid processing apparatus capable of preventing corrosion or scale formation on a pipe in which fluid flows. The electrostatic fluid processing apparatus for conductive fluid has a pipe shape and is supplied to a fluid passage through which conductive fluid flows. The electrostatic fluid processing apparatus for conductive fluid comprises: a first metal layer made of a metal containing copper; an insulation layer disposed inside the first metal layer to come in contact with conductive fluid flowing therethrough and prevent the conductive fluid from coming in contact with the first metal layer; and a second metal layer formed on at least a portion of the inner surface of the insulation layer, through which the conductive fluid flows, and made of zinc which elutes zinc ions into the conductive fluid and generates electrons. The electrostatic fluid processing apparatus for conductive fluid further comprises an external power source whose both polarities are connected to the first metal layer and whose negative polarity is connected to the second metal layer to supply a voltage. The electrostatic fluid processing apparatus for conductive fluid elutes metal ions into the conductive fluid from the second metal layer and generates electrons by application of a constant voltage. Additionally, the present invention provides a conductive fluid supply pipe on which the electrostatic fluid processing apparatus is installed.

Description

TECHNICAL FIELD [0001] The present invention relates to an electrostatic processing apparatus for a conductive fluid and a conductive fluid supply pipe provided with the apparatus,

The present invention relates to an electrostatic processing apparatus for a conductive fluid capable of preventing corrosion or scale formation of a pipe through which a fluid flows, and more particularly to a conductive fluid supply pipe including the processing apparatus, An electrostatic processing apparatus of a conductive fluid capable of more effectively and effectively removing and preventing the metal oxide corroded in the metal piping and effectively preventing scale formed on the inner pipe wall of the metal piping and a conductive fluid supply pipe .

Korea is one of the UN-designated water-scarce countries. Nevertheless, the amount of tap water abandoned due to the deterioration of the water supply pipe, etc., ruptured due to the opening of the water supply pipe, etc., reached 800 million tons a year. In the past 10 years (2001 Year-to-year 2010) Water leakage amount is 8.4 billion m3, accounting for 6 trillion won in financial losses.

The reason for this is that the pipes are mainly made of iron pipes. Since iron (Fe), which is a main component of the metal iron pipe, has a tendency to ionize compared to water (H ₂ O), the iron component dissolves in the water while flowing inside the pipe, As time goes by, this phenomenon accelerates further, leading to rapid deterioration of the piping, and even to the situation where the end consumer is supplied with red lanterns.

Generally, in the case of metal pipes used in water pipes, corrosion is observed from the fifth year on, and a leakage phenomenon occurs in the 15th year. In this situation, the water supply pipe has been replaced with water pipes over 21 years, but the apartments and buildings that are connected to the replaced water supply pipe have insufficient piping management and insufficient maintenance instructions. And it causes waste of water resources and costs, harmful substances of human body and water pollution.

Corrosion phenomena occurring inside the metal pipe today have the following theoretical background. Even if the inside of the metal tube is weak, the water molecules flowing inside the metal tube cause friction on the inner surface of the metal tube, and a potential difference occurs due to the friction. In the process, the iron component of the metal tube is converted to iron ion by depriving electrons, and the iron ion reacts with oxygen in water to generate iron oxide.

Since the iron oxide has a red color, when the metal piping material is severely corroded, the reddish rust is instantaneously poured out. The formula is shown below.

Fe = Fe ^{2 +} + 2e ^-

Fe ^{2 +} + O ₂ + H ₂ O = Fe ₂ O ₃

On the other hand, there is a case where a copper pipe is used to prevent corrosion problems such as a cast iron pipe including iron components. This is mainly used in the case of a small pipe because the copper pipe is expensive compared to a cast iron pipe. However, the problem of corrosion caused by the iron component in the copper tube can be solved, but it can not fundamentally prevent the blue-green phenomenon, and the blue-green is also known as a harmful substance to the human body. Furthermore, although the copper pipe itself can prevent the corrosion problem caused by the iron component, it can not be a fundamental solution to corrosion problems such as cast iron pipes already installed.

In addition, since the copper pipe is not corroded, its durability can be recognized, but scale and water scum formed in the copper pipe can not be prevented. In other words, various minerals are dissolved in water, and calcium ions are contained in the water. Calcium ions (Ca ^{2 +} ) dissolved in water are combined with carbon dioxide (H ₂ CO ₃ ) , They form insoluble calcium carbonate (CaCO ₃ ), which adhere to the inner wall surface of the piping material having the weakest flow velocity, which gradually grows to form a scale. Therefore, the scale functions as a factor for blocking the passage inside the pipe and remarkably lowering the flow velocity. Therefore, even when the piping material is a copper pipe, the formation of the scale can not be fundamentally solved. This phenomenon occurs similarly in the case of water.

Considering these points, various types of products have emerged. Among them, the most efficient product is the ion water processor called scale booster. The ion water processor dissolves the zinc component by friction between the water flowing out of the piping and the wall surface. Since zinc has a very high ionization tendency, and especially ionization tendency is higher than that of iron component, zinc ions already dissolved in water interfere with ionization of iron components from metal pipes such as cast iron pipes, Thereby preventing the phenomenon. In addition, the ionization tendency of the zinc metal and the iron component greatly differs. When the zinc metal and the iron component are immersed in the same solvent, a potential difference is generated. By the potential difference, generation of microorganisms is suppressed and contamination such as scale or water .

A typical example of such an ion water processor is the "fluid treatment apparatus and method" described in Korea Patent Registration No. 0313778. The ion water treatment apparatus disclosed in the above Patent Document uses a zinc block and a fluid flow forming a sacrificial anode in a brass body to generate a potential electrostatic charge due to a natural potential difference between dissimilar metals to remove harmful substances contained in the fluid And a fluororesin block for inducing sedimentation is installed inside. The zinc block and the fluororesin block are formed with a plurality of through holes for fluid flow. The fluororesin block neutralizes the charged colloid in the water so that they flocculate and precipitate so that the filter can be used to more easily filter the foreign matter.

However, it is known that the above-mentioned water treatment apparatus is used in a metal piping material and a considerable period of time is required until the visible effect is confirmed, and the effect of the water treatment by the water treatment apparatus takes place very slowly and slowly. That is, it is estimated that the function of the water flowing inside the metal pipelines is not sufficiently and sufficiently performed. Also, there is a large difference between effects depending on the temperature and the water quality, and there is a problem that the effect is small in places where the scale is large, such as a boiler.

Korean Patent Registration No. 0948338 discloses an electrochemical ion elution method in which a negative electrode is added to an ion generating metal zinc and a positive electrode is added to an ion adsorbing metal, A technique for improving the scale removal effect is disclosed.

The present invention is to provide an electrostatic processing apparatus for a fluid capable of preventing the formation of corrosion inside a metal pipe and preventing scale formation by using the principle of photoelectron effect.

Another object of the present invention is to provide a fluid electrostatic processing apparatus capable of more quickly and efficiently preventing the corrosion of metal pipelines and the formation of scales by mounting the conventional metal pipelines as they are while being mounted between the metal pipelines And a method of using the same.

According to one aspect of the present invention, there is provided an electrostatic processing apparatus for a conductive fluid having a tubular shape provided with a channel through which a conductive fluid passes,

A first tubular metal layer made of a copper-containing metal; A second metal layer formed in the first metal layer and made of tubular zinc capable of flowing a conductive fluid therein; And an insulating layer formed between the first metal layer and the second metal layer, the insulating layer interrupting electrical connection between the first metal layer and the second metal layer and the conductive fluid, wherein the anode is connected to the first metal layer, There is provided an electrostatic processing apparatus for a conductive fluid which includes an external power source to which a negative electrode is connected to a metal layer and which applies a voltage and which dissolves metal ions from the second metal layer into the conductive fluid by application of voltage to generate electrons.

The first metal layer may be brass or pure copper.

The second metal layer may have a tubular shape with one channel through which the conductive fluid passes, or a tubular shape with two or more channels formed therein.

The insulating layer may be plastic, ceramic or non-conductive, and may be selected from PE, PP, PTFE, and fluorine rubber, and may be formed by laminating an insulating film or coating insulating resin.

The insulating layer may include a space portion formed by separating the first metal layer and the second metal layer from each other by an insulator, and the space portion is filled with air or held in a vacuum state. .

Further, the first metal layer, the insulating layer, and the second metal layer may be assemblable.

The external power source can apply a constant voltage within the range of 3V to 27.5V.

Furthermore, the electrostatic processing apparatus for the electroconductive fluid may include at least one electrostatic generating unit that forms a vortex of the electroconductive fluid in at least one of the front end and the back end of the second metal layer with respect to the flow direction of the electroconductive fluid.

According to another aspect of the present invention, there is provided an electrostatic processing apparatus for electroconductive fluid, wherein a metal pipe through which a fluid flows is connected to both ends of the zinc ion generating device, and a conductive fluid flowing through the metal pipe is electrostatically processed There is provided a conductive fluid supply pipe through which electrons generated by driving an external power supply react with iron oxide in the metal pipe to reduce iron.

At this time, the metal pipe may be at least one selected from the group consisting of a boiler pipe, a water pipe, a sewer pipe, an industrial water transfer pipe, and an industrial waste water pipe.

Industrial Applicability In the present invention, when the conductive fluid is industrial water or tap water, the conductive fluid can be directly connected to an industrial water pipe or a water pipe, and the heavy metal component dissolved in the water can be efficiently removed.

In addition, the present invention can efficiently reduce and remove metal components having a high ionization tendency, and in particular, the calcium component can be removed before it is bonded with carbon dioxide in water, There is an advantage to be.

In addition, since the present invention can remove or reduce the concentration of positive ions in the conductive fluid, it is possible to minimize side effects caused by positive ions in the conductive fluid.

Fig. 1 is a schematic diagram showing an electrostatic processing apparatus for a conductive fluid provided in the present invention.
2 schematically shows a cross section of an electrostatic processing apparatus for a conductive fluid according to the present invention, and schematically shows an example in which an insulator film is formed as an insulating layer between a first metal layer and a second metal layer.
Fig. 3 schematically shows a longitudinal section of an electrostatic processing apparatus for a conductive fluid according to the present invention, in which an air layer is formed as an insulating layer between a first metal layer and a second metal layer, As shown in Fig.
FIG. 4 is a view showing a concept that scale is removed by complex formation by zinc ions and water molecules. FIG.
5 is a graph showing an ORP change according to the voltage change measured by Example 1. Fig.
6 is a graph showing a change in zinc ion amount according to the voltage change measured in Example 1. FIG.
FIG. 7 is a graph showing the change in zinc ion amount according to the current change measured by the comparative example 1. FIG.
8 is a graph showing changes in the amount of iron ions contained in the water passing through the cast iron pipe in Example 2. FIG.
9 is a graph showing the degree of suppression of iron oxide formation in Example 3. Fig.
10 is a graph showing the time taken for converting iron oxide into magnetite in Example 4. FIG.
11 is a graph showing a result of measurement of the scale removal amount in the fifth embodiment.

The present invention relates to an electrostatic processing apparatus for a conductive fluid capable of efficiently removing rust formed on a metal pipe through which a conductive fluid flows and preventing rust, and the electrostatic processing apparatus of the present invention is provided with a conduit through which a conductive fluid passes And has a first metal layer, an insulating layer, and a second metal layer.

The shape of the electrostatic processing apparatus is not particularly limited as long as it has a tubular shape capable of passing a fluid and can be connected to a conventional metallic material pipe.

At this time, the conductive fluid flowing through the pipe is not particularly limited as long as it has conductivity, and representative examples of the fluid include water.

As shown in Figs. 1 to 3, the electrostatic processing apparatus of the conductive fluid provided in the present invention is composed of a first metal layer, an insulating layer, and a second metal layer from the outside to the inside. Fig. 1 schematically shows an electrostatic processing apparatus of a conductive fluid provided by the present invention. Fig. 2 schematically shows a cross-sectional view of the electrostatic processing apparatus of Fig. 1. Fig. 3 is a cross- Sectional view of the device.

At this time, the first metal layer of the present invention may be made of a metal containing copper, for example, brass or pure copper, and the second metal layer may be made of zinc.

Electrostatic processing apparatuses for electroconductive fluids generally use a principle in which zinc ions having higher ionization tendencies are first ionized by a natural potential difference generated between copper and zinc dissimilar metals, that is, a potential difference of 1.1 V, and zinc ions are eluted into water will be. At this time, the effect of sacrificing by the zinc ions can prevent the corrosion of the metal pipe, in particular the iron, and the scale present in the water can be removed.

Therefore, it is preferable that the second metal layer is formed inside the conductive fluid so as to be able to contact with the conductive fluid so that zinc ion can be eluted into the conductive fluid. The second metal layer is not particularly limited as long as it includes a channel through which the fluid can flow, and may be a tubular shape including one channel. In addition, the channel may be in the form of a tube bundle including two or more as shown in Fig. At this time, it is preferable to include two or more channels in terms of increasing the contact area with the conductive fluid to increase the zinc ion elution amount. In this case, the number of the channels is not particularly limited as long as the flow rate of the conductive fluid does not excessively decrease during passage through the second metal layer. For example, from 2 to 30, from 3 to 15, from 3 to 10, and the like.

The zinc of the second metal layer is ionized to cause the zinc ions to dissolve into the conductive fluid to generate electrons.

At this time, generally, calcium or magnesium cations are present in the water together with carbonate (HCO ₃ ^- ) and react with each other according to the temperature change to form calcium carbonate (CaCO ₃ ) or magnesium carbonate (MgCO ₃ ). This carbonate has an acicular structure with a size of about 7 탆 and is firmly attached to the inner wall of the pipe to form a scale.

However, when the zinc ion eluted in the conductive fluid present in the fluid, as shown in Fig against the concept that the scale is removed from the complex formed by the zinc ion and water molecule 4, Cl to zinc ions around ^-, NO ₃ ^- , SO ₄ ^{2 -} , PO ₄ ^{3 -,} etc. are gathered around the zinc ions by the electrostatic attraction to form a cloud having a negative charge, and attract ions of positive charges to the electrostatic attracting force, thereby forming an ionophore.

The scale of the acicular structure is grown by the electrical force to change into a spherical shape of an aragonite shape having a diameter of about 110 탆. The spherical scale flows together with the fluid without being attached to the inner wall of the pipe, Scale formation on the inner wall of the pipe can be suppressed.

On the other hand, the eluted zinc ions tend to ionize more than iron in the conductive fluid and have a low electric potential, so that they act as an anode, and iron becomes a cathode. That is, zinc is dissolved in water by an anodic reaction, and the electrons are consumed in a negative reaction occurring on the iron surface. Therefore, zinc in the positive electrode promotes corrosion, while corrosion in the negative electrode can be inhibited by iron.

As a result of the potential difference between the two metals, which are generated when the different metals in contact with each other are exposed to the electrolytic solution, the amount of dissolved oxygen in the water of the zinc ions is lowered and the corrosion rate of the iron is lowered.

In the same principle, and the zinc ions continuously eluted from the zinc dissolution apparatus by a potential difference between brass and zinc, wherein the eluted zinc ion is to increase the alkalinity of the water increases the pH, oxygen and water react with the hydroxide ions (OH ^-) And the electrons react with the rust (Fe ₂ O ₃ ) formed in the pipe to reduce it to black magnetite (Fe ₃ O ₄ ) which is iron oxide.

Corrosion is prevented by zinc ions and electrons, and the theoretical formula for this is shown in the following Schikorr reaction scheme.

_{3Fe (OH) 2 -> FeO} + Fe 2 O 3 + 2H 2 O + H 2 -> Fe (Ⅱ) O + Fe (Ⅲ) 2 O 3 -> Fe 3 O 4

However, for the above reaction, electrons generated from the second metal layer must be inhibited from being received in the anode. Therefore, the first metal layer should be insulated from the second metal layer, and the first metal layer should also be insulated from the conductive fluid. Therefore, it is necessary to form an insulating layer over the entire surface of the first metal layer or the outside of the second metal layer (hereinafter referred to as the first metal layer for the sake of convenience).

The insulating layer is not particularly limited as long as the first metal layer can be insulated from the conductive fluid and the second metal layer. For example, plastic, ceramic, rubber or other non-conductive material having non-conductive properties can be used. Among them, the plastic material is most preferable in the present invention.

Among plastics, plastics having good processability, excellent insulation, and excellent electrostatic properties due to friction are more suitable, and it is desirable to use engineering plastics having good functionality and mechanical strength, and polytetrafluoroethylene PTFE) is most preferable.

Particularly, such a fluororesin causes a static charge when water passes over the surface of the fluororesin, thereby causing fine particles existing in the fluid to be electrostatically agglomerated. Once agglomerated, the particles also promote agglomeration of other particulates present in the aqueous solution. Thereby, as described above, the scale of the needle-shaped structure can be coaxial with the spherical shape to prevent the scale from being formed on the inner wall of the pipe.

The insulating layer may be a coating layer formed by coating the inside of the first metal layer, and may be formed by laminating a film made of the insulating material. In addition, the insulating layer of the present invention may be formed by forming a structure of the insulating material by the first and second metal layers and assembling the first insulating layer in the first metal layer, as shown in FIG. At this time, as shown in FIG. 3, a predetermined space may be formed between the structure made of the insulating material and the first metal layer, and an air space filled with air may be included. Air can serve as an insulating material, and the insulating effect between the first metal layer and the second metal layer or the conductive fluid can be achieved.

In order to perform such an operation, the first metal layer is preferably made of a material including copper, and more preferably, the first metal layer may be made of brass. Further, the first metal layer may further include a nickel plating layer on the outside. The nickel plating is preferable for preventing external impact.

An external power source is connected to the first metal layer and the second metal layer, respectively, in order to elute metal ions from the second metal layer. Zinc ions can be eluted from the second metal layer by connecting the (+) electrode of the first metal layer, connecting the negative (-) electrode to the second metal layer, and applying a constant voltage from the external power source.

That is, the present invention is based on the theory of ion release by the photoelectron effect of Einstein. The present invention applies a theory of ion release due to the photoelectron effect of Einstein. The present invention applies a negative electrode to an inner second metal layer, for example, zinc and forms a first outer metal layer, When a voltage is applied across the (+) electrode, zinc is ionized with electrons from the second metal layer to electrons and electrons are emitted.

The emitted electrons are moved along the tube for movement to the (+) electrode. Hydrogen ions in the water receive electrons, hydrogen gas is released, and ions are released by the amount of electrons emitted from the second metal layer. At this time, since copper ions are eluted by connecting the positive electrode to copper forming the first metal layer, it is preferable to block the brass with water so as not to elute such ions. For this purpose, An insulating layer is formed.

By applying a voltage by an external power source, zinc ion elution by the photoelectronic effect as described above can be maximized. The positive voltage applied by the external power supply is not particularly limited, but it can be applied in the present invention as far as it is capable of emitting electrons from the second metal layer of zinc by photoelectric effect. The positive voltage is preferably 3 V to 27.5 V Lt; / RTI >

At this time, the voltage can be appropriately selected and applied according to the elution amount of zinc ions required, and the amount of zinc ions can be controlled by changing a voltage applied in the range. The setting of the constant voltage may be selected depending on the degree of corrosion and scale of the conductive fluid to be treated, and is not particularly limited. For example, when a constant voltage of 3 to 27.5 V is applied at an electrical conductivity of 100-3000 μS / cm under tap water conditions, it is possible to maximize the discharge amount of zinc ions within a range satisfying the water quality standard.

The electrostatic processing apparatus for a conductive fluid provided in the present invention may be mounted in a housing made of a metal such as stainless steel on the outside of the first metal layer.

The electrostatic processing apparatus for a conductive fluid of the present invention can be applied without any particular limitation as long as it causes corrosion problems of piping. For example, it can be used not only for water supply and sewage piping but also for boiler piping, , Other industrial water, or piping in which industrial wastewater flows.

Example

Hereinafter, the present invention will be described more specifically by way of examples. However, the following examples are merely examples for illustrating the present invention, and thus the present invention is not limited thereto.

Electrostatic water treatment device 1

As shown in FIGS. 1 to 3, a tube made of brass is mounted inside a housing made of stainless steel, and a tube made of polytetrafluoroethylene (PTFE) is disposed inside the brass tube to prevent contact with a fluid flowing into the tube. . Inside the brass tube, there is inserted a tube having a channel of five channels and a sub-tube.

(+) Electrode is connected to the brass, and a negative (-) electrode is connected to the zinc, so that a voltage can be applied by an external power source.

Electrostatic water treatment device 2

As an electrostatic water treatment apparatus disclosed in Japanese Patent No. 0948338, a voltage of 1.1 V is generated by a natural potential difference between dissimilar metals without application of an external power source.

Example  1 and Comparative Example  One

A metallic pipe was fastened to both ends of the electrostatic water treatment apparatus 1, and tap water was flowed at a flow rate of 500 mL / min. At this time, a voltage of 10V was applied through the external power source. (Example 1)

On the other hand, a metallic material pipe was fastened to both ends of the electrostatic water treatment apparatus 2, and tap water was flowed at a flow rate of 500 mL / min (Comparative Example 1). At this time, when the potential difference between zinc and brass was measured, it was confirmed that the natural potential difference generated between the dissimilar metals was 1.1V.

1 L of water according to Example 1 and Comparative Example 1 was analyzed, and the amount of zinc ions contained in the water was measured five times, and the results are shown in FIG.

As shown in Fig. 5, in the case of Comparative Example 1 using the electrostatic water treatment apparatus 2 according to the conventional natural potential difference system, the amount of zinc ions eluted in Example 1 using the electrostatic water treatment apparatus 1 according to the present invention, You can see that much.

It can be seen that when the electrostatic water treatment apparatus 1 for applying a voltage by an external power source is used, the voltage can be controlled, and a considerable amount of zinc ions can be eluted, and the elution amount of zinc ions can be controlled by controlling the voltage Can also be found.

Example  2 and Comparative Example  2

The amount of zinc ions present in water was measured in the same manner as in Example 1 and Comparative Example 1, except that 2 L of water was circulated for 90 minutes. The results are shown in FIG.

As shown in Fig. 6, in the case of Example 2 using the electrostatic water treatment apparatus 1 for applying a voltage by an external power source to the comparative example 2 using the electrostatic water treatment apparatus 2 using the natural potential difference method, the total zinc ion amount This is about six times as many.

Example  3

A 100 m cast iron pipe (100 mm in diameter) was installed and allowed to corrode for 6 months. The Fe ions contained in the water passing through the inside of the corrosion-resistant cast iron pipe were measured, and the maximum was 4.75 ppm. A photograph of water taken at this time is shown in Fig. 8 (a).

The electrostatic water treatment apparatus 1 was connected to the corroded cast iron pipe, and a voltage of 10 V was applied to tap water for 40 days to operate.

During the operation of the electrostatic processing apparatus, the tap water passing through the cast iron tube at a flow rate of 2 m / sec was taken and the Fe ion concentration was measured. The results are shown in Fig. FIG. 8 (b) shows a photograph of water taken at this time.

As can be seen from FIG. 7, it can be seen that the amount of iron ions contained in the water after the electrostatic processing apparatus was installed was significantly reduced.

Also, as can be seen from FIG. 8, it can be seen that the red rust was converted into clean water by virtue of installing the electrostatic water treatment apparatus according to the present invention.

Example  4 and Comparative Example  3

The specimen (10 x 10 x 3 mm) was placed in a water tank as specified in ASTM G31-12a of USA and the water was circulated through the pump at a flow rate of 500 ml / min. The degree of corrosion of the specimen after 168 hours was observed, (Fe ₂ O ₃ ) was measured.

The other specimen was operated by mounting the electrostatic water treatment apparatus 1 (Example 4), and another electrostatic treatment apparatus 2 was mounted on the other specimen (Comparative Example 3).

After 168 hours of corrosion test, the Fe ₂ O ₃ Fig. 9 shows the corrosion amount in which the content of iron oxide was measured. The corrosion amount in the case where the electrostatic water treatment apparatus is not provided for comparison is also shown in Reference Example 1.

As can be seen from Fig. 9, in the case of Example 4 in which the electrostatic water treatment apparatus 1 was installed and operated, the corrosion amount was remarkably reduced compared with Comparative Example 3 in which the electrostatic water treatment apparatus 2 was used. Assuming that the degree of corrosion in Example 4 is 100%, the amount of corrosion in Comparative Example 3 is 175%, and the amount of corrosion in Reference Example 1 is 400%, which indicates that when the electrostatic water treatment apparatus of the present invention is installed It can be predicted that the life of the piping can be remarkably extended.

Example  5 and Comparative Example  4

The specimen (10 x 10 x 3 mm) was placed in a water tank as specified in US ASTM G31-72, the water was circulated through the pump at a flow rate of 500 ml / min, and the specimen was corroded for 168 hours.

The corroded specimens were placed in two water tanks, and the electrostatic water treatment apparatus 1 was installed in one water tank (Example 5) and the electrostatic water treatment apparatus 2 was provided in the other water tank (Comparative Example 4). 500 ml / min of water was continuously circulated for 10 days to each electrostatic processing apparatus.

Each of the specimens was analyzed by XRD to determine the degree of conversion of iron oxide to magnetite (Fe ₃ O ₄ ), and the period during which iron oxide was converted into magnetite was shown in FIG.

As can be seen from FIG. 10, according to the fifth embodiment, the specimen of the water tank in which the electrostatic water treatment apparatus 1 was installed and operated took 5 days to convert iron oxide into magnetite, whereas in the electrostatic water treatment apparatus 2, it took 10 days for iron oxide to convert to magnetite.

Example  6 and Comparative Example  5

The contents of Ca, Mg, K and Si contained in water were calculated on the basis of tap water, and the following scales were prepared.

Scale = CaCO ₃ (64%) + MgCO ₃ (16%) + K ₂ PO ₄ (8%) + SiO ₂ (12%)

The specimens of the same mass were placed in a water bath, water was discharged at a flow rate of 500 ml / min for 10 days, and the scale removal amount was measured after 10 days.

At this time, the electrostatic water treatment apparatus 1 was installed and operated in one water tank (Example 6), and the electrostatic water treatment apparatus 2 was installed in the other water tank (Comparative Example 5). In the other water tank, I did not install it (Reference Example 2).

The above experiment was carried out three times, and the results are shown in Fig.

As can be seen from FIG. 11, in the case of Comparative Example 5 in which the electrostatic water treatment apparatus 2 was applied, the amount of scale removal was about 2-3 times larger than that of Reference Example 2 in which no treatment was performed, In the case of Example 6 to which the apparatus 1 was applied, the scale removal amount was about 4-5 times as much as the scale removal amount in Reference Example 2 in which no treatment was performed.

Claims (12)

An electrostatic processing apparatus for a conductive fluid having a tubular shape provided with a channel through which a conductive fluid passes,
A first metal layer of a copper-containing metal;
An insulating layer located inside the first metal layer and contacting the conductive fluid passing therethrough, the insulating layer blocking contact of the first metal layer with the conductive fluid; And
And a second metal layer formed on at least a portion of the inside of the insulating layer and made of zinc through which the conductive fluid passes and which elutes zinc ions into the conductive fluid and generates electrons,
And an external power source connected to the first metal layer and connected to the second metal layer to apply a voltage, wherein the metal ion is eluted from the second metal layer to the conductive fluid by application of a constant voltage, And the electrostatic processing apparatus for generating a conductive fluid.
The electrostatic processing apparatus of claim 1, wherein the first metal layer is brass or pure copper.
The electrostatic processing apparatus of claim 1, wherein the second metal layer has a tubular shape with one channel through which the conductive fluid passes, or a tubular shape with two or more channels formed.
The electrostatic processing apparatus according to claim 1, wherein the insulating layer is made of plastic, ceramic or non-conductive.
2. The electrostatic processing apparatus according to claim 1, wherein the insulating layer is selected from the group consisting of PE, PP, PTFE, and fluorine rubber.
The electrostatic processing apparatus according to claim 1, wherein the insulating layer is formed by laminating an insulating film or coating an insulating resin.
2. The electrostatic water treatment apparatus according to claim 1, wherein the insulating layer includes a space portion formed by an insulator so as to separate the first metal layer and the second metal layer, and the space portion is filled with air or held in a vacuum state. .
The electrostatic water treatment apparatus of claim 1, wherein the first metal layer, the insulating layer, and the second metal layer are assemblable.
The electrostatic processing apparatus according to claim 1, wherein the external power source applies a constant voltage within a range of 3 V to 27.5 V.
The electrostatic processing apparatus according to claim 1, wherein the electrostatic processing apparatus includes at least one electrostatic generator for forming a vortex of a conductive fluid in at least one of a front end and a rear end of the second metal layer with respect to a flow direction of the conductive fluid. Electrostatic processing apparatus for conductive fluid.
11. An apparatus for electrostatic processing of a conductive fluid according to any one of claims 1 to 10, wherein metal piping is connected to both sides of the apparatus,
Wherein a conductive fluid flowing through the metal pipe passes through the electrostatic processing apparatus and electrons generated by driving the external power supply react with iron oxide in the metal pipe to reduce iron.
12. The conductive fluid supply piping according to claim 11, wherein the metal pipe is at least one selected from the group consisting of a boiler pipe, a water pipe, a sewer pipe, an industrial water transfer pipe, and an industrial waste water pipe.

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