JP2002096070A - Foreign matter adhesion preventive method and foreign matter adhesion preventive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foreign matter adhesion preventive method and foreign matter adhesion preventive device constituted to prevent the adhesion of foreign matter in fluid on a wall surface, etc., by largely growing the foreign matter. SOLUTION: The foreign matter adhesion preventive method consists in applying an electric field to the liquid in which the foreign matter, such as ionized material, is dissolved to activate the foreign matter and to increase chances that respective pieces of the foreign matter come into contact with each other, thereby bonding respective pieces of the foreign matter and largely growing the foreign matter. As a result, the adhesion and deposition of the foreign matter to the inner wall etc., of piping are prevented. The electric field is preferably applied to the liquid in the direction nearly orthogonal with the flow of the liquid. The foreign matter adhesion preventive device has an electric field impressing means 2 for activating the foreign matter by applying the electric field thereto. The electric field impressing means 2 comprises an annular body 3, an iron core 4, a coil 5 and a power source 6. A pair of electrodes may be used as the electric field impressing means 2. The electrodes are formed by curving, are made smaller in surface areas or formed to a needle form or may be provided with a plurality of needles by regulating the density of the needles. Further, the fluid piping 8 is formed of a ferroelectric substance in some cases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for preventing foreign matter such as ionized substances existing in a fluid from adhering and depositing on an inner wall of a pipe.

[0002]

2. Description of the Related Art Various problems occur when foreign substances such as ionized substances are present in a fluid. For example, in a pipe through which wastewater flows, if foreign matter such as ionized substances (for example, calcium ions or magnesium ions) is present in the wastewater, the foreign matter adheres to and accumulates on the inner wall of the pipe, thereby reducing the flow passage area of the pipe. It can be narrowed. And in the worst case, they can be clogged.

As means for solving this problem, there is known a method in which a magnetic field is applied to drainage in a pipe to change the state of the foreign substance so that the foreign substance does not adhere to the inner wall of the pipe. As a means for applying a magnetic field, for example, a means for applying a magnetic field to drainage by forming a magnetic field by rotating in and out of a pipe using a permanent magnet is known.

[0004]

However, the means for preventing foreign matter from adhering with the above construction has not been very effective. The present applicant conducted an experiment in which an aqueous solution containing foreign matter was placed in an experimental tank and a magnetic field was applied with a permanent magnet, but almost no change was observed in the foreign matter mixed in the aqueous solution. As a result, the foreign matter that has entered hardly loses its ability to adhere to the inner wall of the pipe,
There is a problem that clogging of the pipe cannot be eliminated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method and an apparatus for preventing foreign matter from adhering, in which foreign matter in a fluid is grown large so as not to adhere to a wall or the like. Aim.

[0006]

According to a first aspect of the present invention, there is provided a method for preventing foreign matter from adhering, which activates the foreign matter by applying an electric field to a fluid in which the foreign matter has melted, thereby increasing the chance of contact between the foreign matter and bonding the foreign matter to each other. It is characterized by being grown large.

With the above structure, when an electric field is applied to the fluid,
Foreign matter is activated by the electric field. As foreign matter,
There are an ionized substance, a charged substance, and a substance which is ionized or charged when an electric field is applied. When an electric field is applied to these foreign substances, free electrons jump out of the foreign substances and move around actively. The actively moving free electrons enter surrounding foreign substances (molecules) or repel electrons in the foreign substances. The holes after the free electrons jump out also move actively in the molecule. In addition, ionized foreign matter
The cathodes and the anodes repel and separate from each other, and the cathode and the anode attract each other and approach each other. The foreign matter thus activated vibrates violently and often hits surrounding foreign matter. This increases the chance of contact between foreign objects,
Gradually, the foreign substances are joined together and become larger. It may grow long in a fibrous form. Further, the activated foreign matter may combine with the foreign matter deposited on the inner wall of the pipe.

[0008] The large aggregated foreign substances are less likely to adhere to the wall surface and increase the resistance of the fluid, and therefore flow without being attached to the wall surface of the pipe.
Further, the activated foreign matter may combine with the foreign matter deposited on the inner wall or the like of the pipe, but in this case, the activated foreign matter peels off the foreign matter deposited on the inner wall or the like. That is, the bonded foreign matter is peeled off from the inner wall or the like due to the energy of the activated foreign matter or a pole opposite to the inner wall or the like. As a result, the foreign substances accumulated on the inner wall and the like are gradually removed and disappear.

The foreign matter adhesion preventing method according to a second aspect of the present invention is the method according to the first aspect, wherein the electric field is applied in a direction substantially orthogonal to the flow of the fluid when the fluid is flowing. It is characterized by.

With the above structure, when an electric field is applied in a direction substantially perpendicular to the flow of the fluid, the charged foreign matter is attracted by the electric field and at the same time in a direction perpendicular to the electric field and the magnetic field by Fleming's left-hand rule. And shaken. Further, similarly to the first aspect, the foreign matter is activated by the phenomenon of free electrons and holes. In this case, a DC power supply may be used as the power supply. However, if the AC electric power supply is used to invert the electric field, the foreign substances can be shaken more violently and can be efficiently activated. Then, the activated foreign matter is bonded to each other, or combined with the foreign matter deposited on the inner wall and peeled off, thereby preventing the foreign matter from adhering to the wall surface or the like.

According to a third aspect of the invention, there is provided an apparatus for preventing foreign matter from adhering, which applies an electric field to a fluid in which the foreign matter has melted to activate the foreign matter, thereby increasing the chances of contact of the respective foreign matter and causing the foreign matter to be bonded to each other and greatly grow. An application unit is provided.

According to the above configuration, when an electric field is applied to the fluid by the electric field applying means, the foreign substances are activated and, as described above, are bonded to each other or bonded to the foreign substances deposited on the inner wall and peeled off. Prevents foreign matter from adhering to walls and the like.

According to a fourth aspect of the present invention, there is provided a foreign matter adhesion preventing device according to the third invention, wherein the electric field is applied by the electric field applying means in a direction substantially orthogonal to the flow of the fluid. I do.

According to the above configuration, when the electric field is applied by the electric field applying means in a direction substantially orthogonal to the flow of the fluid, the charged foreign matter is activated by the electric field as described above. Then, the activated foreign matter is bonded to each other, or combined with the foreign matter deposited on the inner wall and peeled off, thereby preventing the foreign matter from adhering to the wall surface or the like.

According to a fifth aspect of the present invention, there is provided the foreign matter adhesion preventing device according to the third or fourth aspect, wherein the electric field applying means is configured to store the fluid in which the foreign matter is dissolved or the fluid. An annular body formed surrounding the fluid pipe through which the fluid flows, an iron core formed from the annular body toward the storage tank or the fluid pipe, and opposed to each other so as to sandwich the storage tank or the fluid pipe, and each iron core. And a power supply for supplying power to the coil.

According to the above configuration, when power is supplied from the power source to the coil, a magnetic path closed by the annular body is formed between the two coils sandwiching the storage tank or the fluid pipe, and a strong magnetic path is formed in the storage tank or the fluid pipe. A strong magnetic field is formed. Then, a strong electric field is formed in a direction orthogonal to the magnetic field. This electric field activates the charged foreign matter. This allows
As described above, activated foreign substances may bind to each other,
Foreign matter deposited on the inner wall is bonded and peeled off, thereby preventing foreign matter from adhering to the wall surface or the like.

According to a sixth aspect of the present invention, there is provided the foreign matter adhesion preventing device according to the third or fourth aspect, wherein:
The electric field applying means includes a pair of electrodes disposed across a storage tank or a fluid pipe for flowing the fluid in which the fluid in which the foreign matter is melted is provided, and a power supply for applying a voltage to the electrodes. Features.

With the above structure, when a voltage is applied between the pair of electrodes from the power supply, an electric field is generated between the electrodes. An electric field is generated in the storage tank or the pipe by disposing the pair of electrodes across the storage tank or the pipe. In addition, by appropriately adjusting the voltage applied between the electrodes, the strength of the electric field in the storage tank or the pipe can be adjusted. Foreign matter in the fluid is activated by the electric field generated by the pair of electrodes. As a result, as described above, the activated foreign substances are bonded to each other, or combined with the foreign substances deposited on the inner wall, and peeled off, thereby preventing the foreign substances from adhering to the wall surface or the like.

According to a seventh aspect of the present invention, there is provided the foreign matter adhesion preventing device according to the sixth invention, wherein one or both of the pair of electrodes are curved so as to project the flat plate toward the other side. It is characterized by being formed by.

According to the above configuration, in the case of a DC power supply, if the cathode side is formed to be curved so as to protrude toward the anode side, the electric flux lines are concentrated on the protruding tip portion on the cathode side.
Thereby, the electric flux density is reduced, and an electric field can be efficiently generated in the storage tank or the pipe. In the case of an AC power supply, both are formed to be curved, so that the electric flux lines are concentrated on the protruding tip portion.

According to an eighth aspect of the present invention, there is provided the foreign matter adhesion preventing device according to the sixth invention, wherein the surface area of one or both of the pair of electrodes is reduced to reduce the electric flux density. And

According to the above configuration, the electric flux density is reduced by the pole having a small surface area, and an electric field can be efficiently generated in the storage tank or the pipe.

According to a ninth aspect of the present invention, there is provided a foreign matter adhesion preventing device according to the sixth aspect, wherein one or both of the pair of electrodes are needle-shaped to reduce the electric flux density. I do.

According to the above configuration, in the DC power supply, the electric wire is concentrated on the acicular cathode by making the cathode side acicular. Thereby, the electric flux density is reduced, and an electric field is efficiently generated in the storage tank or the pipe. In the case of an AC power supply, by making both of them acicular, the electric flux lines are concentrated on the acicular cathode, thereby narrowing the electric flux density and efficiently generating an electric field.

According to a tenth aspect of the present invention, there is provided an apparatus for preventing adhesion of foreign matter,
In the foreign matter adhesion preventing device according to the sixth aspect, a plurality of needles are provided on one or both of the pair of electrodes, and the installation density of the needles is made denser in a central portion and gradually reduced as going to the periphery. Features.

According to the above configuration, the electric flux density is increased when the installation density of the needles on the cathode side is increased, and the electric flux density is decreased when the installation density is reduced. Therefore, by adjusting the installation density of the needles and the electric flux density distribution, it is possible to set the electric field in the storage tank or the pipe to a uniform density, or to increase the density of a specific portion. This is particularly useful for large storage tanks or pipes.

According to an eleventh aspect of the present invention, there is provided a
In the foreign matter adhesion preventing device according to any one of the fifth to tenth aspects, the storage tank or the fluid pipe is formed of a ferroelectric material.

With the above configuration, the electric flux lines can be made parallel in the storage tank or the fluid pipe. The ferroelectric has a property that the electric flux lines that are diffused or converged outside thereof are made parallel when they pass through the inside. For this reason, when the storage tank or the fluid pipe is formed of a ferroelectric substance, the electric flux density passing through the internal space can be made uniform. As a result, a uniform electric field can be applied to the fluid in the storage tank or the fluid pipe, and the entire foreign substance existing in the fluid in the storage tank or the fluid pipe can be efficiently activated.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for preventing foreign matter adhesion and a device for preventing foreign matter adhesion according to the present invention will be described with reference to the accompanying drawings.

The foreign matter adhesion preventing method and foreign matter adhesion preventing device according to the present embodiment are a method and an apparatus for activating foreign matter in a fluid to prevent the foreign matter from adhering to a wall surface or the like. As used herein, the term “foreign matter” refers to a substance that is affected by an electric field, such as an ionized substance, a charged substance, and a substance that is ionized or charged when an electric field is applied. Further, the fluid includes not only liquid but also gas. This is because foreign substances such as ionized substances may be mixed in the gas.

As the ionized substance, there are various substances such as calcium ion and magnesium ion. In addition, non-ionized substances may be charged. Foreign substances such as ionized substances and charged substances are directly affected by the electric field.

The inventor of the present application has found through experiments that foreign matters such as the above-mentioned ionized substances are not significantly affected by the magnetic field but are greatly affected by the electric field. An example of an experiment representing this is shown in FIGS. FIG. 3 shows a state immediately after the potassium chloride aqueous solution is put in the container. FIG. 4 shows a state in which an electric field is applied to a container containing an aqueous solution of potassium chloride and about two hours have elapsed. When a similar experiment was performed by applying a magnetic field, it took about 50 hours to reach the state shown in FIG.

As can be seen from the experimental results, there is little change when a magnetic field is applied to a charged foreign substance, but it changes greatly when an electric field is applied. That is, the foreign matter is combined with each other by the electric field to form a large mass, or grow long like a fiber. These foreign substances are electrically neutral, and do not adhere to the walls and the like, and settle on the bottom of the experimental tank in a short time.

The inventor of the present invention has devised a foreign matter adhesion preventing method and a foreign matter adhesion preventing device for preventing foreign matter from being adhered by applying an electric field to a fluid from this experiment.

Hereinafter, the method for preventing the adhesion of foreign matter and the apparatus for preventing the adhesion of foreign matter will be specifically described. In the present embodiment, a liquid will be described as an example of the fluid. There are various pipes through which the liquid passes, such as an industrial water line, a drain line, and a chemical liquid line for chemical treatment.

[Foreign matter adhesion preventing device] First, a foreign matter adhesion preventing device used in the foreign matter adhesion preventing method according to the present embodiment will be described. FIG. 1 is a front view showing a foreign matter adhesion preventing device 1 according to the present embodiment.

The foreign matter adhesion preventing device 1 is a device for activating the foreign matter by applying an electric field to a liquid in which a foreign matter such as an ionized substance or a charged substance is dissolved. The foreign matter adhesion preventing device 1 includes an electric field applying unit 2. The electric field applying means 2 includes an annular body 3, an iron core 4,
It comprises a coil 5 and a power supply 6.

The annular body 3 is formed so as to surround the fluid pipe 8. Specifically, the whole is formed in a substantially rectangular quadrangular ring shape. The quadrangular annular body 3 is formed so as to have a bulge in the middle in the longitudinal direction. This bulge is for allowing the annular body 3 to surround the fluid pipe 8 having a circular cross section without contacting it.

Each iron core 4 is formed so as to project from the annular body 3 toward the fluid pipe 8 and face each other so as to sandwich the fluid pipe 8. The tip of each iron core 4 is in close contact with the surface of the fluid pipe 8. As a result, a magnetic field is formed in the fluid pipe 8 between the tips of the respective iron cores 4, and an electric field is formed by the magnetic field in a direction orthogonal to the direction (the direction of the arrow A in FIG. 1). The tip of each iron core 4 may be brought into contact with the surface of the fluid pipe 8 or a small gap may be maintained.

The coil 5 is formed by winding one conductive wire around each iron core 4 in the same direction. That is, one conductive wire extending from the power source 6 is first wound right-hand around the first iron core 4A (the iron core 4 on the left side in FIG. 1) from the base end to the tip (rightward), and then the second core. The iron core 4 </ b> B is wound clockwise from the distal end to the proximal end (rightward) and connected to the power supply 6. The coil 5 applies an electric field in a direction orthogonal to the fluid pipe 8 (the direction in which the liquid flows). The specific phenomenon of this electric field will be described later.

The power source 6 is a power source for supplying power to the coil 5 wound around the first and second cores 4A and 4B.
As the power supply 6, an AC power supply having a square wave having a frequency of 50 to 10 kHz is used.

The foreign matter adhesion preventing device 1 having the above-described structure is similar to that shown in FIG.
As shown in (2), it is attached to the upstream side of the fluid pipe 8 so as to surround the fluid pipe 8.

[Method of Preventing Adhesion of Foreign Substances] A method of preventing adhesion of foreign substances using the apparatus 1 for preventing adhesion of foreign substances will be described below.

The foreign matter adhesion preventing method is a direction in which an electric field is applied to a fluid in which foreign matter such as an ionized substance has melted to activate the foreign matter, thereby preventing the foreign matter from being adhered.

First, power is supplied to each coil 5 by the power supply 6. Thus, at a certain moment, the state shown in FIG. 1 is obtained. That is, a closed magnetic path is formed by the annular body 3 between the first iron core 4A and the second iron core 4B having the two coils 5, and a strong magnetic field is formed in the fluid pipe 8. At this time, the first iron core 4A has an N pole, and the second iron core 4B has an S pole. Then, a strong electric field is formed in the direction of arrow A orthogonal to the magnetic field. Since the power source 6 is an alternating current, the directions of the magnetic field and the electric field are reversed at the next moment.

In the state of FIG. 1, foreign matter in the fluid pipe 8 is
The foreign matter is moved by being drawn by the electric field in the direction of arrow A, and the foreign matter is moved in the fluid pipe 8 by the force according to Fleming's left hand rule in the direction perpendicular to the electric field and the magnetic field. Here, it moves downward from above with respect to the paper surface in FIG. When the directions of the magnetic field and the electric field are reversed, the foreign matter is drawn and moved in the opposite direction.

Thus, the foreign matter is violently shaken in accordance with the frequency of the power supply 6. Further, free electrons jump out of the foreign matter and move around actively. The actively moving free electrons enter surrounding foreign substances (molecules) or repel electrons in the foreign substances. The holes after the free electrons jump out also move actively in the molecule. Further, the ionized foreign matter repels and separates between the cathodes and between the anodes, and attracts and approaches each other between the cathode and the anode. Due to these phenomena,
Foreign matter is activated.

The activated foreign matter often vibrates and collides with the surrounding foreign matter in many cases. As a result, the chances of contact between the foreign substances increase, and the foreign substances gradually combine and become larger. It may grow long in a fibrous form.
Further, the activated foreign matter may combine with the foreign matter deposited on the inner wall of the pipe.

The large aggregated foreign substances hardly adhere to the wall surface and increase the resistance of the fluid, so that they flow without adhering to the wall surface of the fluid pipe 8 or the like. Further, the activated foreign matter may combine with the foreign matter deposited on the inner wall or the like of the fluid pipe 8, but in this case, the activated foreign matter peels off the foreign matter deposited on the inner wall or the like. That is, the bonded foreign matter is separated from the inner wall or the like by the energy of the activated foreign matter, the repulsive force between the same poles, the energy of the flowing fluid, and the like. As a result, the foreign substances accumulated on the inner wall and the like on the downstream side of the foreign matter adhesion preventing device 1 in the fluid pipe 8 are gradually removed and disappear.

[Effect] As described above, when the foreign matter in the liquid is activated by the electric field, the foreign matter in the liquid is combined with the foreign matter to grow larger, or combined with the foreign matter deposited on the inner wall or the like to remove the foreign matter. Since it is peeled off, the foreign matter does not accumulate on the wall surface of the fluid pipe 8, and the foreign matter that has already accumulated can be removed.

As a result, even if the fluid pipe 8 is used for a long time, clogging does not occur, so that the number of maintenance operations can be greatly reduced. As a result, when the fluid pipe 8 is used for various devices, the fluid pipe 8
Can be maintained in a normal state for a long time, and the running cost can be greatly reduced.

[Modifications] (1) In the above embodiment, the electric-field applying means 2 using the coil 5 has been described as an example of the foreign matter adhesion preventing device 1, but the present invention is not limited to this, and other configurations may be used. Good. That is,
The present invention, if an electric field can be applied to the fluid in which foreign matter is present,
Since the same operation and effect as those of the above embodiment can be obtained, a pair of electrodes may be used. An example of this is shown in FIG. Here, the electric field applying means 11 is connected to a pair of electrodes 12,
13 and an AC power supply 14. A pair of electrodes 1
Reference numerals 2 and 13 are formed in a flat plate shape. Two flat electrodes 12 and 13 are attached to the outer peripheral surface of the fluid pipe 8 so as to face each other. As the AC power supply 14, a power supply having a square wave having a frequency of 50 to 10 kHz is used similarly to the power supply 6.

When an AC voltage is applied from the AC power supply 14 to the pair of electrodes 12 and 13, an electric field whose direction is reversed in accordance with the frequency is formed in the fluid pipe 8. Accordingly, the same operation and effect as those of the above-described embodiment can be obtained.

Note that a DC power supply may be connected to the pair of electrodes 12 and 13. The DC power supply is inferior to the AC power supply in terms of the action of activating foreign matter, but is superior in the ability to move foreign matter to one side. That is, the foreign matter can be attracted in the direction of the electric field in the fluid and collected on one side, which is excellent in concentrating the foreign matter. When an electric field is applied to a container or the like that stores fluid with a DC power supply, foreign substances can be collected in one side of the fluid, and the fluid containing high-concentration foreign substances and the fluid containing low-concentration foreign substances can be separated. it can.

Further, by appropriately adjusting the voltage applied between the electrodes 12 and 13, the intensity of the electric field in the fluid pipe 8 can be adjusted. Thereby, the intensity of the electric field can be adjusted according to the concentration of the foreign matter in the fluid.

(2) In the first modification, the electrode is
As shown in FIG. 6, the flat plate may be formed to be curved so as to protrude toward the other side. The electrode 16 may be formed by bending only one of them, or may be formed by bending both of them. In particular, it is preferable that both are formed in the case of the AC power supply, and the negative pole is formed in the case of the DC power supply.

According to the above configuration, in the case of a DC power supply, the cathode side is curved so as to protrude toward the anode side, so that the electric flux lines are concentrated on the protruding tip portion on the cathode side. Accordingly, the electric flux density is reduced, and an electric field can be efficiently generated in the fluid pipe 8. In the case of an AC power supply, both are formed to be curved, so that the electric flux lines are concentrated on the protruding tip portion.

(3) As shown in FIG. 7, the electrodes may be formed with a small surface area. Also in this case, the surface area of one or both of the pair of electrodes is appropriately reduced according to the DC power supply and the AC power supply. With this configuration, in the case of a DC power supply, the electric flux density is reduced on the cathode side having a small surface area, and an electric field can be efficiently generated in the fluid pipe 8. In the case of an AC power supply, the electric flux density is reduced at both poles having a reduced surface area.

(4) The electrodes may be needle-shaped as shown in FIG. Also in this case, one or both of the pair of electrodes is appropriately formed into a needle shape in accordance with the DC power supply and the AC power supply. With this configuration, in the case of a DC power supply, the electric flux density is reduced by the needle on the cathode side, and an electric field can be efficiently generated in the fluid pipe 8. In the case of an AC power supply, the electric flux density is reduced by the needles of both poles.

(5) The electrode may be constituted by providing a plurality of needles. Also in this case, a plurality of needles are appropriately provided on one or both of the pair of electrodes according to the DC power supply and the AC power supply.
The setting density of each needle is set so that it is dense at the center and becomes gradually sparser toward the periphery. With this configuration,
If the installation density of the cathode side needle is made high, the electric flux density becomes high, and if it is made sparse, the electric flux density becomes low. Therefore, by adjusting the installation density of the needles and the electric flux density distribution, it is possible to set the electric field in the storage tank or the pipe to a uniform density, or to increase the density of a specific portion. This is particularly useful for large storage tanks or pipes.

(6) Further, the fluid pipe 8 may be formed of a ferroelectric material. Thereby, the electric flux lines can be made parallel in the fluid pipe 8. The ferroelectric has a property that the electric flux lines that are diffused or converged outside thereof are made parallel when they pass through the inside. Therefore, when the fluid pipe 8 is formed of a ferroelectric substance, the electric flux density passing through the internal space can be made uniform. As a result, a uniform electric field can be applied to the fluid in the fluid pipe 8, and the entire foreign substance existing in the fluid in the fluid pipe 8 can be efficiently activated.

(7) In the above embodiment, the case where the foreign matter adhesion preventing device 1 is provided in the fluid pipe 8 has been described as an example, but it may be provided in a storage tank for storing liquid. The storage tank is not limited to one for storing the liquid for a certain period of time, and may be one for performing some processing on the liquid. In the case of such a storage tank as well, foreign matter may adhere to and accumulate on the inner wall. By providing the foreign matter adhesion preventing device 1, the adhesion and accumulation of the foreign matter can be eliminated.

(8) The foreign matter adhesion preventing device 1 may be provided in a large tank or the like. In this case, the foreign matter adhesion preventing device 1 may be made large in accordance with a large tank or the like.
As described above, the drawer tube 18 may be provided in the large tank 17 and the foreign matter adhesion preventing device 1 may be provided in the drawer tube 18. In this case, a circulation pump 19 is provided to
The liquid in 7 is circulated to the extraction pipe 18. Then, an electric field is applied to the liquid in the draw-out pipe 18 by the foreign matter adhesion preventing device 1 to activate the foreign matter and return the foreign matter to the large tank 17. Accordingly, it is possible to prevent foreign matters from being deposited on the inner wall of the large tank 17.

(9) In the above embodiments and the respective modifications, a liquid has been described as an example. However, the present invention is not limited to a liquid, and it is needless to say that the same operation and effects as those of the above embodiment can be obtained in the case of a gas. Nor.

(10) In the above embodiment, the electric field is applied in a direction orthogonal to the flow of the liquid. However, the direction of the electric field does not have to be exactly the orthogonal direction. If the direction is substantially orthogonal, the same operation and effect as the above embodiment can be obtained.

(11) In the above embodiment, in the case of the DC power supply, the DC voltage is applied continuously, but the DC voltage may be applied intermittently. In this case, the foreign matter can be efficiently activated while keeping the power consumption low.

[0067]

As described in detail above, according to the present invention,
The following effects are obtained.

Since the foreign matter in the fluid is activated by an electric field by the foreign matter adhesion preventing device, the foreign matter in the fluid is combined with the foreign matter and grows large, or the foreign matter deposited on the inner wall or the like is combined to form the foreign matter. It comes to peel off. As a result, the foreign matter does not accumulate on the wall surface of the pipe or the like, and the already accumulated foreign matter can be removed.

As a result, even if the pipes and the like are used for a long period of time, foreign substances do not build up on the inner wall or cause clogging, and the number of maintenance operations can be greatly reduced.

Further, when the piping and the like are used for various devices, the related functions such as the piping and the like can be maintained in a normal state for a long time, and the running cost can be greatly reduced. .

[Brief description of the drawings]

FIG. 1 is a front view showing a foreign matter adhesion preventing device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example in which the foreign matter adhesion preventing device according to the embodiment of the present invention is attached to a fluid pipe.

FIG. 3 is a schematic diagram showing a state immediately after a potassium chloride aqueous solution is put in a container.

FIG. 4 is a schematic diagram showing a state in which an electric field is applied to a container containing an aqueous solution of potassium chloride and about two hours have elapsed.

FIG. 5 is a perspective view showing a first modification of the present invention.

FIG. 6 is a perspective view showing a second modification of the present invention.

FIG. 7 is a perspective view showing a third modification of the present invention.

FIG. 8 is a perspective view showing a fourth modification of the present invention.

FIG. 9 is a perspective view showing a fifth modification of the present invention.

[Explanation of symbols]

1: foreign matter adhesion preventing device, 2: electric field applying means, 3: annular body, 4: iron core, 5: coil, 6: power supply, 8: fluid pipe.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Sugawara 2-7-5 Yoyogi, Shibuya-ku, Tokyo Royal Equipment Co., Ltd. (72) Hisashi Hirata 3-15-12 Kisaigaoka, Kokura-minami-ku, Kitakyushu-shi, Fukuoka F term (reference) 3H024 DA10 4D061 DA05 DA08 DA10 DB05 EA02 EA19 EB01 EB18 EB19 EC01 EC11

Claims (11)

[Claims] 1. A method for preventing foreign matter from adhering, characterized in that an electric field is applied to a fluid in which foreign matter has melted to activate the foreign matter, thereby increasing the chances of contact of the foreign matter and bonding the foreign matter to each other to grow the foreign matter greatly. 2. The method according to claim 1, wherein, when the fluid is flowing, the electric field is applied in a direction substantially orthogonal to the flow of the fluid. 3. An electric field applying means for applying an electric field to the fluid in which the foreign matter has melted to activate the foreign matter, increasing the chances of contact between the foreign matters, and coupling the foreign matters to each other to grow the foreign matter greatly. Foreign matter adhesion prevention device. 4. The foreign matter adhesion preventing device according to claim 3, wherein the electric field is applied by the electric field applying means in a direction substantially orthogonal to the flow of the fluid. 5. The foreign matter adhesion preventing device according to claim 3, wherein the electric field applying means is formed so as to surround a storage tank for storing the fluid in which the foreign matter has melted or a fluid pipe for flowing the fluid. An annular body, an iron core formed from the annular body toward the storage tank or the fluid pipe and opposed to each other so as to sandwich the storage tank or the fluid pipe, and a coil wound in the same direction around each iron core. A foreign matter adhesion preventing device, comprising: a power supply for supplying electric power to a coil. 6. The foreign matter adhesion preventing device according to claim 3, wherein the electric field applying means is disposed across a storage tank for storing a fluid in which the foreign matter has melted or a fluid pipe for flowing the fluid. A foreign matter adhesion preventing device comprising: a pair of electrodes; and a power supply for applying a voltage to the electrodes. 7. The foreign matter adhesion preventing device according to claim 6, wherein one or both of the pair of electrodes are formed to be curved so as to project a flat plate toward the other side. Anti-adhesion device. 8. The foreign matter adhesion preventing device according to claim 6, wherein the surface area of one or both of the pair of electrodes is reduced to reduce the electric flux density. 9. The foreign matter adhesion preventing device according to claim 6, wherein one or both of the pair of electrodes are needle-shaped to reduce the electric flux density. 10. The foreign matter adhesion preventing device according to claim 6, wherein a plurality of needles are provided on one or both of the pair of electrodes, and the installation density of the needles is gradually increased in a central portion toward the periphery. A foreign matter adhesion preventing device characterized by being sparse. 11. The foreign matter adhesion preventing device according to claim 5, wherein the storage tank or the fluid pipe is formed of a ferroelectric material.