KR102109978B1 - A Drum of an Electro-osmosis Dehydrator - Google Patents

Abstract

The present invention relates to a drum of an electro-osmosis dehydrator, which removes water from sludge by electrophoresis and removes water from sludge by an electric field formed between a drum and a caterpillar as the sludge is introduced between the drum rotated by being negatively or positively charged, and the caterpillar charged oppositely to the drum and circulated and driven by having a surface facing the outer surface of the drum. In particular, the drum comprises: a drum body which rotates about a rotating shaft in the center thereof, is formed to be hollow, and has a cylindrical outer surface; an insulating resin layer which is composed of an electrically insulating resin coated on the outer surface of the drum body; and an electrode plate which is placed on an outer surface of the insulating resin layer so as to surround the drum body, and has an outer surface constituting the outer surface of the drum, and to which a voltage of a negative electrode or a positive electrode is applied, wherein the electrode plate is provided by having a niobium thin film layer or a titanium nitride layer, and a boron-doped diamond layer sequentially stacked on one surface of a base panel made of titanium.

Description

A drum of an electro-osmosis dehydrator

The present invention relates to a drum of an electrophoretic electro-penetrating dehydrator, specifically, removing the water from the sludge by the electrophoretic principle applies a voltage to either the anode or the cathode while applying a pressing force to the sludge in the electro-penetrating dehydrator. It relates to a drum on which the electrode is installed.

The electrophoretic electroinfiltration dehydrator is to form an electric field where the sludge passes in order to remove the sludge containing water by the electrophoretic principle so that water is released from the sludge by a voltage difference caused by the electric field.

Electric penetrating dehydrator of this principle consists of a drum to which an anode or a cathode is applied, a caterpillar to which electricity of the opposite polarity is applied to the drum at a certain distance from the drum, and a filter cloth belt wound to transfer and dewater sludge between the drum and the caterpillar. do.

A direct current voltage is applied between the drum and the caterpillar to form an electric field, and water around the liquid sludge particles charged in the electric field moves toward the electrode opposite to the charge of the sludge particles due to electrophoresis and capillary action, thereby causing moisture from the sludge. The sludge is dewatered by removal.

Specifically, by the electric field, the sludge particles have a negative (-) charge and the moisture in the sludge particle layer has a positive (+) charge, so the moisture moves to the negatively charged side of the drum and caterpillar and passes through the filter cloth belt. The sludge particles are discharged by being accumulated in the filter cloth belt in a dehydrated state without passing through the filter cloth belt even when the force is applied toward the positively charged side.

The surface of the drum of the electro-penetrating dehydrator must be charged with an anode or a cathode, so electrical conductivity must be high, and since it comes into contact with water in a charged state, corrosion resistance must be high.

As a conventional technique for a drum of an electro-penetrating dehydrator, Korean Patent No. 860979 (Document 1) discloses an invention named 'electro-penetrating dehydrator'.

In the invention of Document 1, the drum is made of stainless steel material, a copper plate is provided on the outer surface of the drum, and a titanium plate coated with a platinum-based metal is disposed on the outer surface of the drum, and the copper plate and the titanium plate have a head. The bolts coated with platinum-based metal are combined in a state where there is no play between the drums.

According to the description of document 1, in the invention of document 1, the drum has high strength and high corrosion resistance by the titanium plate disposed on the outer surface. In addition, the titanium plate is also an insoluble electrode by a platinum-based metal coated on the surface, and is resistant to electrochemical corrosion by hardly generating electrolysis due to low emission of metal ions during dehydration. In addition, the electrical conductivity is improved and the Coulomb heat is reduced by the copper plate 4, which is disposed without play between the outer surface of the drum and the inner surface of the titanium plate.

However, in the drum of this structure, the current applied from the outside is disposed to surround the drum and is applied not only to the titanium plate contacting with sludge and moisture, but also to the main body of the drum, which is an internal structure, so that the charging efficiency of the drum is low. .

In addition, since the copper plate disposed inside the titanium plate is very susceptible to corrosion, there is also a problem that the copper plate is corroded by moisture flowing through the side of the drum.

Document 1: Korean Patent No. 860979 Document 2: Republic of Korea Patent No. 179233

The present invention is intended to solve the problems of the prior art described above, and to provide a drum suitable for use in an electro-infiltration dehydrator that dehydrates water from sludge by an electrophoretic principle.

Specifically, this invention is intended to provide a drum having a high charging efficiency as an electrode and a high corrosion resistance.

The problem to be solved of the present invention described above is to dehydrate moisture from the sludge by electrophoresis, charged with a negative electrode or a positive electrode, and rotated with a drum and a drum opposite to the opposite polarity and having a surface facing the outer surface of the drum. It is achieved by the present invention for the drum of the electro-infiltration dehydrator in which water is dehydrated from the sludge by the electric field formed between the drum and the caterpillar, where sludge flows between the caterpillar.

The drum of the invention,

A drum body which rotates around a central rotation axis and is hollow and has a cylindrical outer surface; An insulating resin layer made of an electrically insulating resin coated on the outer surface of the drum body; And an electrode plate disposed on the outer surface of the insulating resin layer so as to surround the drum body and having an outer surface constituting the outer surface of the drum, and to which a voltage of a cathode or an anode is applied,

In the electrode plate 40, a niobium thin film layer or a titanium nitride layer and a boron-doped diamond layer are sequentially stacked on one surface of a base material panel made of titanium.

In this configuration of the present invention, an electrode plate that is supported and disposed on the drum body but electrically insulated from the drum body by an insulating resin layer is disposed on the outer surface of the drum and a voltage is applied thereto.

Therefore, the voltage is not applied to the drum body, but the voltage is applied only to the electrode plate disposed on the outer surface of the drum, thereby increasing the charging efficiency of the drum.

In addition, since the drum body is not charged because no voltage is applied, corrosion is not promoted by moisture in the sludge, and thus the drum body may be constructed of a material having relatively low corrosion resistance.

The boron-doped diamond layer becomes the silver outer surface of the electrode plate. Since the diamond layer functions as an insoluble electrode having high charging efficiency and very strong corrosion, the corrosion resistance and durability of the drum are improved, and charging efficiency is improved.

As a further feature of the invention, the drum of the invention,

A through hole penetrating the drum body and the insulating resin layer is formed, and a power supply unit for supplying power of positive or negative electrodes supplied from the outside of the drum to the electrode plate through the through hole extends between the inner space of the drum body and the electrode plate. It can be configured to be arranged.

In this configuration, electrical power to the drum body can be maintained while power is supplied directly from the drum inner space to the electrode plate without going through the drum body and the insulating resin layer.

As an embodiment of these additional features,

The drum body is provided with a hollow pipe disposed around the through hole,

The power supply member,

A first nut attached to the inner surface of the electrode plate at a position corresponding to the position of the through hole, and

A rod member that extends into the space inside the drum through the hollow pipe, one end is screwed to the first nut, and the other end is electrically connected to a cable that supplies the positive or negative power supplied from the outside of the drum to the electrode plate.

Including,

An electrically insulating washer is disposed at the inner end of the hollow pipe, and the rod member can be configured to extend through the electric and electrically insulating washer into the inner space of the drum body.

This configuration ensures reliable electrical insulation to the drum body, and can easily configure a power supply member for the electrode plate in the drum's inner space.

In addition, a second nut that presses the electrical insulating washer against the inner end of the hollow pipe from the opposite side of the first nut is fastened to the rod member, so that the electrode plate is coupled to the drum body.

With this configuration, the power supply member functions as a configuration in which the electrode plate is coupled to the drum main body, and thus, a separate configuration for coupling the electrode plate to the drum main body is not required, thereby simplifying the drum configuration and manufacturing cost. While lowering, the support of the electrode plate can be reliably made.

As a further feature of this invention, in the drum of this invention,

The electrode plate,

The first electrode plate is disposed to surround the drum body in a state in contact with the outer surface of the insulating resin layer, and the outer surface of the first electrode plate is coated with an irinium thin film on the outer surface of the base material of titanium. Arranged to surround the drum body in the state, and may be configured to include a second electrode plate is a thin film layer of niobium or titanium nitride and a diamond layer doped with boron sequentially stacked on the surface of the base material of titanium. .

The boron-doped diamond layer is very useful as an insoluble electrode, exhibits high efficiency, and has good charging efficiency, but has a manufacturing process that is not suitable for application to a drum of a dehydrator for treating a large volume of sludge.

According to a further feature of the invention, the drum body is surrounded by a first electrode plate coated with a thin film of iridium and a second electrode plate is attached thereto. Therefore, the second electrode plate can be divided into several and attached to the first electrode plate. Therefore, the second electrode plate can be configured by dividing it into small sizes according to the manufacturing process without integrally forming it.

As a specific implementation mode,

The first electrode plate is composed of a plurality of planes perpendicular to the diameter direction of the drum and continuous to each other in the circumferential direction, and the second electrode plate is composed of a plurality of panels lying parallel to one plane of the first electrode plate, , The second electrode plate is coupled to the first electrode plate by screwing the iridium thin film on the head through the second electrode plate and being fastened to the first electrode plate.

1 is a front view showing a schematic configuration of an electro-infiltration dehydrator in which the drum of the present invention is used.
2 is a cross-sectional view of a drum of an embodiment according to the invention.
3 is a perspective view showing a state in which the first and second electrode plates are attached to the drum body of the drum of the embodiment according to the present invention.
4 is a partial cross-sectional view showing a state in which the first and second electrode plates are attached to the drum body of the drum according to the present invention, and is a cross-sectional view cut perpendicular to the rotation axis of the drum.
5 is an enlarged view of circle A in FIG. 2.
6 is a graph showing the test results for the electrode plate of the embodiment according to the present invention and the electrode plate of the comparative example.

Hereinafter, as a specific content for carrying out the present invention, the configuration and operation of the drum of the electroinfiltration dehydrator according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Prior to the description of the configuration of the drum, the overall configuration of the electro-infiltration dehydrator in which the drum of this embodiment is used will be schematically described with reference to FIG. 1.

The sludge supply unit 110, the drum 1, the caterpillar 130, and the sprocket 40 are provided in the electric infiltration dehydrator 100 in which the drum of this embodiment is used.

The sludge supply unit 110 is provided on the upper portion of the electric infiltration dehydrator 100, and includes a rotating unit 111 and two rollers 112. When the sludge is introduced into the sludge supply unit 110, the sludge is input while the sludge is rotated by the rotating unit 111, and the sludge is injected between the drum 1 and the caterpillar 130 by the roller 112 under the rotating unit 111. .

The drum 1 rotates with a cylindrical body having an electrode plate charged with a cathode or an anode on the outer surface.

The caterpillar 130 is circulatingly driven at a predetermined interval from the drum 1. The caterpillar 130 is equipped with an electrode to which the DC power of the opposite polarity to the drum 1 is applied to the surface facing the drum 1, and a filter cloth is disposed outside the electrode to pass moisture dehydrated from the sludge.

The sludge supplied from the sludge supply unit 110 moves between the drum 1 and the caterpillar 130 while the positive electrode is placed between the drum 1 charged and the caterpillar 130 charged as the cathode. It is separated from the sludge and moved to the caterpillar 130 side. The moisture is discharged through the filter cloth disposed in the caterpillar 130, and the dewatered sludge is discharged from the end of the caterpillar 130.

In the electroporation dehydrator 100 in which the drum 1 of this embodiment is used, a configuration for supplying DC power of an anode to an electrode to the rotating drum 1, a configuration for supplying cooling water, and rotationally driving the drum 1 Although a configuration such as a drive motor is further provided, all of these configurations are known and widely used can be used as they are, and thus description and illustration are omitted in this specification and drawings.

On the other hand, the electro-penetrating dehydrator of the above-described configuration is exemplary, and the drum of this embodiment is capable of dehydrating moisture from the sludge by electrophoresis, and is applicable to any electro-penetrating dehydrator of any construction as long as the drum is charged and rotated to the positive or negative electrode. .

Referring to Figure 2 will be described the overall configuration of the drum 1 used in the electro-infiltration dehydrator 100.

The drum 1 is formed of a hollow cylinder having an internal space as a whole, and is rotated by receiving power from a driving motor (not shown), the drum main body 10 being rotated and driven, and the drum main body 10 is coupled to the drum main body ( 10) is arranged to surround the outer surfaces of the plurality of first electrode plates 30 and the first electrode plates 30 that are disposed to surround the outer surfaces of the rotating shaft 20 and the drum body 10 by supporting and rotating them. It is configured to include a plurality of second electrode plates 40, which are coupled to each other, and a power supply unit 50 that supplies DC power to the first and second electrode plates 30 and 40.

The drum body 10 has a double structure of a cylindrical outer body 11 and an inner body 12 having different diameters from each other. The outer body 11 and the inner body 12 constituting the drum body 10 are obtained by processing a stainless steel panel in a cylindrical shape.

At both ends of the drum body 10 in the direction of the rotation axis A, a hub 131 in which the rotation shaft 20 is inserted at the center and an extension portion 132 extending radially from the hub 131 are disposed, The drum main body 10 is supported by the hub 131 by engaging the extension portion 132 by providing an engaging portion 16 at which both the outer main body 11 and the inner main body 12 are coupled at both ends of the drum body. .

The hub 131 is provided with a bracket 134 for supplying electric power supplied from the outside to the inner space of the drum body 10, and a plurality of cables 51 from the bracket 133 are inside the drum body 10. It extends into space.

The drum body 10 is formed with a through hole 14 penetrating the outer body 11 and the inner body 12 at a plurality of positions, and a pipe 141 surrounding the through hole 14 is provided with the outer body. It is fixed to (11) and the inner main body (12).

The drum body 10 is disposed on the outer surface of the outer body 11 such that the first and second electrode plates 30 and 40 forming electrodes surround the outer body 11.

3 to 5, the configuration of the first and second electrode plates 30 and 40 and the configuration in which they are coupled to the outer body 11 and the voltage is applied to the first and second electrode plates 30 and 40 Describes the configuration.

3 is a perspective view showing that the first and second electrode plates 30 and 40 are attached to the drum body 10, and the second electrode plate 40 surrounds the entire outer surface of the first electrode plate 30. 3, the state in which only the second electrode plate 40 is attached so that the shape of the first electrode plate 30 is exposed to the outside.

Unlike the outer body 11 having a cylindrical shape, the first electrode plate 30 has a shape divided into 24 planes in a circumferential direction. The first electrode plate 30 forms a single structure by bending a flat panel and welding the ends to each other.

The second electrode plate 40 is made of a flat, rectangular, flat panel, and five are arranged in the rotational axis direction A with respect to the first electrode plate 30, and the first electrode plate 30 is also circumferential. It is arranged in each of the planes of the first electrode plate 30 so as to cover the entire outer surface.

As will be described later, the second electrode plate 40 has a boron-doped diamond layer deposited on the outer surface of a titanium base material by chemical vapor deposition (CVD) or the like, but due to the characteristics of processes such as chemical vapor deposition, titanium having a large area has a large surface area. It is difficult to form a diamond layer on the base material.

Therefore, in the embodiment of the present invention, the base material of the second electrode plate 40 is composed of a plurality of flat rectangular panels so as to facilitate the stacking of the diamond layer by a chemical vapor deposition method on the base material of titanium. A diamond layer is laminated on a panel made of titanium serving as a base material of.

In addition, the second electrode plate 40 in the form of a flat panel is easy to be disposed on the first electrode plate 30 and a gap is not generated between the first electrode plate 30 and the second electrode plate 40. The electrode plate 30 is formed to be divided into planes in a circumferential direction.

However, the present invention is not limited to the flat panel form, the second electrode plate 40 is formed as a curved surface, the first electrode plate 30 is not separately installed, and the second electrode plate 40 is a drum body ( It can be directly attached to the outer surface of 10). In addition, although the second electrode plate 40 is divided into five in the axial direction A, the present invention is not limited to this number, and the second electrode plate may be formed and disposed in one in the axial direction.

Although not shown in the drawing, the outer surface of the outer body 11 of the drum body is coated with an insulating resin. The electrical power between the first and second electrode plates 30 and 40 and the drum body 10 is made by coating the insulating resin, and the DC power applied to the first and second electrode plates 30 and 40 is It is not applied to the drum body 10.

In this embodiment, the insulating resin uses fluorine resin in consideration of insulating performance, cost, and coating performance, but in addition to the fluororesin, Teflon or other highly insulating resin is coated on the outer surface of the outer body 11, or of insulating resin. A film can be attached.

The second electrode plate 40 is coupled to the first and electrode plates 30 by screws 15.

Referring to FIG. 5, the screw 15 is made of titanium material, and an iridium thin film is formed on the screw head 151 to which the drum is exposed to the outside. Since the screw head 151 is exposed to the outer surface of the second electrode plate 40, during the dewatering process of the sludge, the first and second electrode plates 30. 40 are placed under a high level of magnetic field in a charged state, and moisture Since it is in contact with, a coating with high corrosion resistance is made to prevent corrosion.

4 and 5 together, a plurality of through holes 14 penetrating the outer body 11 and the inner body 12 of the drum body 10 are formed, and the In the circumference, a cylindrical pipe 141 is coupled to the outer body 11 and the inner body 12.

The pipe 141 combines the outer body 11 and the inner body 12 with each other to improve the rigidity and strength of the drum body 10, and is disposed through the through hole 14 to provide first and second electrode plates ( 30, 40) serves to protect the elements (52, 53) for applying power.

The first nut 52 is fixed at a position corresponding to the position of the through hole 14 on the inner surface of the first electrode plate 30 by welding or the like. As the through hole 14, a rod member 53 having a male screw formed on the entire outer surface is inserted as a power supply member, and one end of the rod member is screwed to the first nut 52.

An insulating washer 57 and a metal washer 58 made of polycarbonate are disposed at an inner end of the pipe 141, that is, an end disposed in the inner space of the drum body 10, and the rod member 53 is a washer. It penetrates (54, 55) and protrudes into the inner space, to which two second nuts (54, 55) are fastened. The terminal 56 of the cable 51 is inserted and coupled between the second nuts 54 and 55.

According to this configuration, the direct current power supplied to the drum 1 is the first electrode plate 30 and the second electrode plate (here) in contact with the cable 51, the rod member 53 and the nut 52. 40), and the first and second electrode plates 30 and 40 are charged with the polarity of the supplied power.

In addition, the rod member 53 is coupled to the first nut 52 fixed to the first electrode plate 30, and the rod member 53 has a second nut 54 from the opposite side of the first nut 52. Since 55) is fastened and supported by the pipe 141, the first electrode plate 30 is supported and coupled to the drum body 10 in a state in contact with the outer body 11 of the drum body by this structure.

However, the outer surface of the outer body 11 of the drum body in contact with the first electrode plate 30 is coated with fluorine resin and electrically insulated, and the first and second electrode plates 30 and 40 are drum bodies. Since the rod member 53 coupled to (10) is also electrically insulated from the drum body 10 by an insulating washer 57, the drum body 10 has first and second electrode plates 30 and 40. It is insulated from being electrically conducting.

Therefore, only the first and second electrode plates 30 and 40 of the drum body 10 are charged by the DC power supplied to the drum 1, and the drum body that occupies a significant portion of the weight of the drum is not charged. In addition to increasing the power use efficiency for, charge is concentrated on the first and second electrode plates 30 and 40 constituting the outer surface of the drum 1, thereby improving charging performance.

Further, since the drum body 10 is not charged, corrosion of the drum body 1 is not promoted even if moisture discharged from the sludge flows into the drum body 10.

On the other hand, the first electrode plate 30 is iridium coated on the outer surface of the titanium base metal panel. The first electrode plate 30 of the iridium-coated titanium base material becomes an insoluble electrode and exhibits high corrosion resistance in an electrically charged environment during dewatering treatment of sludge.

The second electrode plate 40 has a boron-doped diamond layer formed on an outer surface of a titanium base metal panel.

The boron-doped diamond layer is layered on a titanium panel by chemical vapor deposition, but when directly stacked on a titanium panel, the titanium base material diffuses into the diamond layer to form a compound, and the titanium base material is hexagonal crystal. Since it has a structure and the diamond layer has a cubic crystal structure, the bonding with the diamond layer is not sufficient, and the mutual thermal conductivity and thermal expansion coefficient are different, so that there is a great risk of peeling.

In the second electrode plate 40 of this embodiment, a thin film layer of titanium nitride (TiN) or niobium (Nb) is formed on the surface of the titanium base material, and a boron doped diamond layer is formed thereon.

Titanium nitride (TiN) and niobium (Nb) have the same cubic crystal structure as that of the diamond layer, but the bond between the diamond layer is made strong, but the difference between the thermal expansion coefficient and the thermal conductivity of titanium is small, so that it does not peel.

The material constituting the second electrode plate 40 and a method of manufacturing the same are described in detail in Korean Patent No. 173233 (Document 2), and thus detailed description thereof will be omitted.

Document 2 describes that an electrode prepared by forming a boron-doped diamond layer on a metal panel based on titanium can be usefully used for an electrode for water treatment, but the electrode of this material is subjected to electrophoresis as in the present invention. It is not considered to be used as a drum for the electroinfiltration dehydrator.

In the structure as disclosed in Document 1, the entire drum body acts as an electrode, and a boron-doped diamond panel as disclosed in Document 2 is difficult to form a curved surface shape other than a flat surface, and in particular, the size of a large drum for sludge treatment. It is difficult to manufacture.

This invention is applied to the drum of the electropenetrating dehydrator by electrophoresis with a material having the same structure as disclosed in Document 2.

The inventors of the present invention tested the dehydration performance using an electrode coated with iridium on a titanium base material as the first electrode plate 30 and an electrode having the same configuration as the second electrode plate 40 applied to the drum of this example. .

The electrode to be tested is arranged on one side, and the metal panel is configured to filter moisture while supporting the sludge like the caterpillar of this example, and after the sludge is placed between them, the voltage of the anode is applied to the electrode and the metal is applied. The voltage of the negative electrode was applied to the panel.

6 shows a graph of test results according to different voltage conditions.

FIG. 6 shows that the water content of the sludge is lowered over time, that is, moisture is dehydrated from the sludge. It can be seen that the water content of B-BDD) is lower.

From these results, a titanium panel in which a boron-doped diamond layer is stacked can obtain useful results when it is used in the drum of an electropermeable dehydrator for dewatering sludge.

In this embodiment, a boron-doped diamond layer that cannot be formed into a large-area curved surface was applied to the drum of the electroinfiltration dehydrator. Further, by electrically insulating the electrode plates 30 and 40 functioning as electrodes from the drum body 10, which occupies most of the mass in the drum, the charging efficiency as an electrode is improved, and the drum body 10 is not electrically charged. By preventing the drum body 10 from being made of a material having a lower corrosion resistance than the electrode plate, the phenomenon that the drum body 10 is accelerated by corrosion is prevented.

As described above, one preferred embodiment of the present invention has been described, and the present invention is not limited to the configuration of this embodiment, and various modifications, modifications, and configurations can be added within the scope of the claims.

1: Electropenetration dehydrator 10: Drum body
20: rotating shaft 30: first electrode plate
40: second electrode plate

Claims (6)

The water is dewatered from the sludge by electrophoresis, charged with a cathode or an anode, and charged with the opposite polarity to the rotating drum and drum, and the sludge flows between the caterpillar which has a surface facing the outer surface of the drum and is circulated to drive the drum. A drum of an electric infiltration dehydrator in which moisture is dehydrated from sludge by an electric field formed between the caterpillar and
A drum body which rotates around a central rotation axis and is hollow and has a cylindrical outer surface;
An insulating resin layer made of an electrically insulating resin coated on the outer surface of the drum body; And
An electrode plate which is placed on the outer surface of the insulating resin layer so as to surround the drum body and has an outer surface constituting the outer surface of the drum, and to which a voltage of a cathode or an anode is applied.
Including,
A through hole penetrating the drum body and the insulating resin layer is formed, and a power supply member for supplying power to the electrode plate from the outside of the drum through the through hole extends between the inner space of the drum body and the electrode plate. Is placed,
The drum body is provided with a hollow pipe disposed around the through hole,
The power supply member,
A first nut attached to the inner surface of the electrode plate at a position corresponding to the position of the through hole, and
A rod member that extends into the space inside the drum through the hollow pipe, one end is screwed to the first nut, and the other end is electrically connected to a cable that supplies the positive or negative power supplied from the outside of the drum to the electrode plate.
Including,
An electrically insulating washer is disposed at the inner end of the hollow pipe, the rod member penetrates the electrically insulating washer and extends into the inner space of the drum body, and the rod member is provided with an electrically insulating washer on the opposite side of the first nut. A drum of an electro-infiltration dehydrator, in which a second nut pressing against the inner end is fastened, so that the electrode plate is coupled to the drum body. delete delete delete The method according to claim 1,
The electrode plate,
A first electrode plate which is disposed to surround the drum body in a state in contact with the outer surface of the insulating resin layer, and is coated with an irinium thin film on the outer surface of the base material of titanium material, and
The first electrode plate is arranged to surround the drum body in contact with the outer surface, a thin film layer of niobium or titanium nitride is laminated on the surface of the base material of titanium, and a diamond layer doped with boron on the thin film layer of niobium or titanium nitride Second electrode plate to be stacked
It is configured to include, the drum of the electro-infiltration dehydrator. The method according to claim 5,
The first electrode plate is composed of a plurality of planes perpendicular to the radial direction of the drum in a circumferential direction to each other,
The second electrode plate is composed of a plurality of panels placed parallel to one plane of the first electrode plate, and the second electrode is fastened to the first electrode plate by screwing the iridium thin film on the head through the second electrode plate. The drum of the electroinfiltration dehydrator, wherein the plate is coupled to the first electrode plate.

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