JP2021118112A - Water plasma generation device, energizing member used for the same, and water plasma generation method - Google Patents

Abstract

To make it easy to trigger an arc discharge between an anode and a cathode in order to inject water plasma.SOLUTION: A water plasma generation device 12 includes a chamber 17 in which a vortex water flow is formed internally to inject water plasma from an injection port 75, an anode provided near the injection port on the outside of the chamber, and a cathode 16 that is inserted into the chamber at one end and generates an arc discharge that passes through a vortex water flow between the cathode and the anode. An auxiliary anode portion 40 that is electrically connected in parallel with the anode is provided on the outer peripheral side of the chamber. The auxiliary anode portion 40 is provided so as to hold an energizing member 60 that comes into contact with one end of the cathode 16 and passes through the injection port 75 such that energization can be performed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a water plasma generator that injects water plasma by an arc discharge generated between a cathode and an anode to decompose an object to be decomposed, an energizing member used for the water plasma generator, and a water plasma generation method.

As an apparatus for treating waste using water plasma, the apparatus described in Patent Document 1 is known. In the apparatus of Patent Document 1, water is used as a plasma stabilizing medium, and incinerator ash is supplied to a water plasma jet stream generated by an arc discharge to dissolve the incinerator ash. The water plasma jet stream is ejected from a water plasma burner, which comprises a cathode and an anode for generating an arc discharge and a chamber located on the end side of the cathode to form a vortex stream. ..

Japanese Patent No. 34087779

In the water plasma burner, water plasma is injected by performing an arc discharge between the cathode and the anode through the cavity at the center of the vortex water flow. Therefore, if the arc discharge is not generated, the water plasma cannot be injected. However, in the water plasma burner, the arc generation side of the cathode is inside the chamber, while the anode is outside the chamber, and the distance between them is long, so that the first generation (trigger, ignition) of arc discharge occurs. Becomes difficult. In this respect, the present inventor has accumulated diligent research by repeating trial and error, and has found a configuration and a method for easily causing an arc discharge in water plasma injection.

The present invention has been made in view of this point, and is a water plasma generator capable of easily generating an arc discharge trigger between an anode and a cathode in order to inject water plasma, and an energization used therefor. It is an object of the present invention to provide a member and a method for generating water plasma.

The water plasma generator of the present invention is a water plasma generator that injects water plasma by passing an arc discharge inside the vortex water flow, and the vortex water flow is formed inside and injects the water plasma from an injection port. An anode provided near the injection port on the outside of the chamber, and a cathode having one end inserted into the chamber to generate an arc discharge passing through the vortex stream between the anode and the anode. An auxiliary anode portion electrically connected to the anode is provided on the outer peripheral side of the chamber, and the auxiliary anode portion is an energizing member that contacts one end of the cathode and passes through the injection port. Is provided so as to be able to be energized with the energizing member.

According to this configuration, the energizing member is held in contact with the cathode by the auxiliary anode portion, and then a voltage is applied to the anode, the auxiliary anode portion and the cathode to energize the energizing member, whereby the heat generated by the energization is generated. The energizing member can be vaporized. Then, immediately after or substantially at the same time as this vaporization, an arc discharge can be generated between the anode and the cathode by the current flowing through the energizing member. In other words, the energizing member vaporized by energization can be used as a trigger for arc discharge, and the trigger can be easily and stably generated.

Further, the energizing member used in the water plasma generator of the present invention includes an insertion shaft portion that contacts one end of the cathode and passes through the injection port, a holding shaft portion held by the auxiliary anode portion, and the insertion. It is characterized in that it is formed by a shaft-shaped body including a shaft portion and a connecting shaft portion that connects the holding shaft portion.

Further, the water plasma generation method of the present invention is a water plasma generation method using the water plasma generator, wherein the energizing member is passed through the injection port and brought into contact with one end of the anode. A holding step of holding the energizing member on the auxiliary anode portion, a vortex flow forming step of forming the vortex flow inside the chamber before and after the holding step, and after the vortex flow forming step, the anode, the said. A voltage is applied to the auxiliary anode portion and the cathode to energize the energizing member, and the energizing member is vaporized by the heat generated by the energization to generate an arc discharge between the anode and the cathode, and the arc discharge is generated. It is characterized by performing an injection step of injecting the water plasma by passing it through the inside of a vortex water flow.

According to the present invention, an arc discharge trigger can be easily generated between the anode and the cathode in order to inject water plasma.

It is explanatory drawing of the water plasma generator and its peripheral device which concerns on embodiment. It is a side sectional view of a chamber and an auxiliary anode part. It is a plan sectional view of a chamber. It is a vertical sectional view of a chamber. It is explanatory drawing of the state in which the arc discharge and the water plasma are generated. It is a schematic perspective view of a chamber and an auxiliary anode part. 7A and 7B are circuit diagrams of the water plasma generator. It is explanatory drawing of the positioning method using a jig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Each configuration according to the embodiment is not limited to the configuration shown below, and can be changed as appropriate. Further, in the following figures, some configurations may be omitted for convenience of explanation.

FIG. 1 is an explanatory diagram of a water plasma generator and its peripheral device according to the embodiment. In the following description, unless otherwise specified, "up", "down", "left", "right", "front", and "rear" are used with reference to the directions indicated by the arrows in each figure. In FIG. 1, the front side of the paper is "left" and the depth side is "right". However, the orientation of each configuration in the following embodiments is only an example, and can be changed to any orientation.

FIG. 1 is an explanatory diagram of a water plasma generator and its peripheral device according to the present embodiment. As shown in FIG. 1, the water plasma generator 12 is provided with a cathode 16 extending back and forth, a chamber 17 into which the front end side (one end side) of the cathode 16 is inserted, and an outside of the chamber 17 diagonally downward and forward. It is configured to include an iron disk-shaped anode 18 to be formed and an anode support portion 19 for supporting the anode 18. Further, the water plasma generator 12 includes an auxiliary anode portion 40 provided in the chamber 17, and the detailed configuration of the auxiliary anode portion 40 will be described later.

The cathode 16 is formed of a round bar made of carbon, and is displaced in the front-rear direction via the feed screw shaft mechanism 21 so that the amount of insertion into the chamber 17 can be adjusted. The chamber 17 is supported above the anode support portion 19 via a support plate 22. An extension cylinder 23 extending back and forth is connected to the rear end of the anode support portion 19, and a motor 24 is provided at the rear end of the extension cylinder 23. The driving force of the motor 24 is transmitted to the anode 18 through the extension cylinder 23 and the anode support portion 19, and the anode 18 is rotatably provided.

Cooling water is supplied to the chamber 17 via the supply pump 26, and plasma water is supplied via the high-pressure pump 27. A part of the plasma water is jetted from the front end side of the chamber 17 as a jet stream of water plasma. The cooling water supplied to the chamber 17 and the plasma water that has not been injected are sucked through the vacuum pump 28. Also in the anode support portion 19, the cooling water flowing inside the anode 18 is supplied via the supply pump 26, and the cooling water absorbed by the anode 18 is sucked through the vacuum pump 28. The detailed configuration of the chamber 17 will be described later.

A nozzle 31 constituting the supply device 30 is provided in front of the water plasma generator 12. The nozzle 31 is connected to the delivery device 32 via a pipe (not shown), and the granular, powdery, or liquid decomposition target is delivered from the delivery device 32. The nozzle 31 introduces (supplies) the delivered decomposition target into the jet stream of water plasma ejected from the water plasma generator 12. In addition to the supply device 30 and the water plasma generator 12, a gas treatment device that cools a high-temperature gas containing a decomposition target object decomposed by water plasma and then treats it into a safe exhaust gas by a neutralization reaction or the like (non-standard). By providing (shown in the figure), the disassembly processing apparatus can be configured. In the disassembly processing device, each of the above-mentioned devices may be housed in a container (housing) for freight transportation, or may be mounted on a truck bed or the like.

Next, the internal structure of the chamber 17 will be described with reference to FIGS. 2 to 4. FIG. 2 is a side sectional view of the chamber and the auxiliary anode portion, FIG. 3 is a plan sectional view of the chamber, and FIG. 4 is a vertical sectional view of the chamber. FIG. 5 is an explanatory diagram of a state in which an arc discharge and water plasma are generated.

As shown in FIGS. 2 and 3, the chamber 17 constituting the water plasma generator 12 includes a chamber body 70 forming an inner peripheral surface of a cylinder extending in the front-rear direction and a front wall portion mounted in front of the chamber body 70. 71 is provided, and an internal space 72 for generating water plasma is formed inside them. An opening communicating with the internal space 72 is formed in the front wall portion 71, and an injection port forming plate 74 is attached so as to close the opening from the front. An injection port 75 for injecting water plasma is formed on the injection port forming plate 74.

Inside the chamber body 70, a rib 70a extending in the circumferential direction is formed at a position closer to the front, and a plasma water supply path 77 is formed on the front side of the rib 70a. Further, the front wall portion 71 is formed with a plasma water discharge passage 78 for discharging the plasma water flowing into the opening. High-pressure plasma water is supplied from the high-pressure pump 27 to the plasma water supply path 77, and plasma water is sucked from the plasma water discharge path 78 by the negative pressure of the vacuum pump 28.

A cooling water supply path 80 and a cooling water discharge path 81 (not shown in FIG. 3) are formed behind the rib 70a of the chamber body 70. Cooling water is supplied from the supply pump 26 to the cooling water supply passage 80, and the cooling water is sucked from the cooling water discharge passage 81 by the negative pressure of the vacuum pump 28. The plasma water supply path 77, the cooling water supply path 80, and the cooling water discharge path 81 are formed in a round hole shape which is an inner peripheral surface of a cylinder.

As shown in FIG. 4, the plasma water supply passage 77 communicates with the lower part of the internal space 72 which is circular in the vertical cross-sectional view and extends in the left-right direction. Specifically, the plasma water supply path 77 extends in the lower tangential direction of the internal space 72. As a result, the plasma water flowing from the plasma water supply path 77 smoothly flows along the circumferential direction of the internal space 72.

The water plasma generator 12 includes a substantially tubular vortex water flow generator 90 housed in the chamber 17. The vortex water flow generator 90 is arranged so that the internal space 72 and the central axis position C1 coincide with each other. The central axis position C1 coincides with the central axis position of the injection port 75 described above. In a vertical cross-sectional view, the internal space 72 forms a circular space between its inner peripheral surface and the outer peripheral surface of the eddy current generator 90, and the plasma water flowing into the internal space 72 as described above is circular. It flows like turning in the space of.

The vortex water flow generator 90 is formed with a plurality of passages 91 penetrating so as to communicate with each other inside and outside. The passages 91 are formed at equal angles (every 120 ° in the present embodiment) in the circumferential direction of the vortex water flow generator 90. Further, the passages 91 are formed at predetermined intervals in the front-rear direction (see FIGS. 2 and 3). Each passage 91 extends in a direction in which it is inclined with respect to the thickness direction of the vortex water flow generator 90. Specifically, each passage 91 extends in the inner peripheral tangential direction of the vortex water flow generator 90 at the communication position. Further, the angle θ formed by the direction in which the plasma water flows from the outside to the inside of the passage 91 and the direction in which the plasma water swirls and flows outside the vortex water flow generator 90 is an acute angle.

Since the passage 91 is formed as described above, the plasma water flowing along the inner peripheral surface of the chamber body 70 outside the vortex water flow generator 90 passes through the passage 91 and flows into the vortex water flow generator 90. Then, the plasma water flows smoothly along the inner peripheral surface of the vortex water flow generator 90, and a vortex water flow that swirls in a circle is formed so as to form a cavity at the central axis position C1 in the vertical cross-sectional view. ..

When DC power is supplied to the cathode 16 and the anode 18 in the state where the vortex water flow is formed in this way, the anode 18 passes through the inside of the cavity formed in the vortex water flow, as shown in FIG. An arc discharge AR is generated between the and the cathode 16. By the generation of this arc discharge AR, the plasma water forming the vortex water flow is dissociated and ionized, and the jet stream J of the water plasma having high energy is injected from the injection port 75. Here, the anode 18 is provided so that its upper end is located on the outside of the chamber 17 in the vicinity of the obliquely lower front part of the injection port 75.

The jet stream J of the water plasma injected from the injection port 75 becomes an extremely high temperature and ultra-high speed fluid, and when the decomposition target is injected from the tip of each nozzle 31, the decomposition target is decomposed. Here, when the decomposition target is a hazardous waste, PCB, sulfuric acid pitch, asbestos, freon, halon, tires, various kinds of dust and the like can be exemplified, and the supply device 30 is provided as granular, powdery or liquid. Supplied through. Even if such hazardous waste is thrown in, it can be decomposed into detoxified waste.

Here, the water plasma generator 12 of the present embodiment includes an auxiliary anode portion 40 as a configuration for forming a vortex water flow and then triggering an arc discharge AR as described above. FIG. 6 is a schematic perspective view of the chamber, the auxiliary anode portion, and the jig. As shown in FIGS. 2 and 6, the auxiliary anode portion 40 is provided on the outer peripheral side of the chamber 17, and the energizing member 60 is held by the auxiliary anode portion 40.

The auxiliary anode portion 40 includes a plate-shaped base 41 attached to the upper surface 70b of the chamber body 70, a holding member 42 that sandwiches the energizing member 60 together with the base 41, and an elastic member 43 that applies a force to hold the holding member 42 toward the base 41. And have.

The base 41 is made of a metal plate made of a conductor such as copper, and wiring for energizing a DC power source (all not shown) is connected via a connector or the like. The elastic member 43 is formed by a band-shaped leaf spring extending in the front-rear direction. The rear end side (one end side) of the elastic member 43 is connected to the base 41 via a screw (fastening member) 45. The front end side (the other end side) of the elastic member 43 is connected to the sandwiching member 42.

The sandwiching member 42 includes a connecting portion 42a that is connected to the front end of the elastic member 43 and extends forward, and a spacing forming portion 42b that extends diagonally forward from the front end of the connecting portion 42a toward the upper surface of the base 41. Further, the holding member 42 is obliquely upward from the contact piece portion 42c extending forward parallel to the upper surface of the base 41 from the lower end of the gap forming portion 42b and the front end (opposite side to the elastic member 43) of the contact piece portion 42c. It is provided with a rising portion 42d that rises forward.

The sandwiching member 42 is arranged at a position where the connecting portion 42a and the front end side of the elastic member 43 are separated from the upper surface of the base 41 by a predetermined distance by forming the spacing forming portion 42b. Therefore, the elastic member 43, which becomes a flat leaf spring in a no-load state, elastically deforms so as to move away from the upper surface of the base 41 toward the front, and exerts an elastic force that presses the front end side of the elastic member 43 downward. .. Therefore, the elastic member 43 applies a force to press the holding member 42 toward the base 41.

The rising portion 42d extends from the front end of the contact piece portion 42c in the direction intersecting the base 41, and when the energizing member 60 is inserted between the contact piece portion 42c and the base 41, a gripping allowance by the fingertip of the operator Can be used as.

FIG. 7A is a circuit diagram of the water plasma generator. The auxiliary anode portion 40 is electrically connected in parallel with the anode 18. The auxiliary anode portion 40 and the anode 18 are connected to the positive electrode side of a DC power source 47 such as a DC generator. The cathode 16 is connected to the cathode side of the DC power supply 47 via the switch 48.

Returning to FIGS. 2 and 6, the energizing member 60 is formed by bending two positions on one shaft at substantially right angles, and is held by the auxiliary anode portion 40 while passing through the injection port 75 of the chamber 17. Will be done. The energizing member 60 includes an insertion shaft portion 61 that extends in the front-rear direction and passes through the injection port 75, a connecting shaft portion 62 that extends upward along the front end of the insertion shaft portion 61, and a rear portion that connects to the upper end of the connecting shaft portion 62. It is provided with a holding shaft portion 63 extending to. The connecting shaft portion 62 connects the front end of the insertion shaft portion 61 and the front end of the holding shaft portion 63. In the present embodiment, the energizing member 60 is an alloy containing aluminum.

The insertion shaft portion 61 has a length that allows the insertion shaft portion 61 to pass through the injection port 75 with its rear end in contact with the front end (one end) of the cathode 16 and the rear end (other end) side projecting forward of the injection port forming plate 74 in the chamber 17. It is provided in. Further, in a state where the rear end of the insertion shaft portion 61 is in contact with the front end of the cathode 16, the connecting shaft portion 62 is separated forward from the injection port forming plate 74 which is the front surface of the chamber 17, and the holding shaft portion 63 is the auxiliary anode portion 40. In, the base 41 and the holding member 42 are sandwiched and held from the vertical direction.

Next, a method of positioning the cathode 16 and the anode 18 in the water plasma generator 12 of the present embodiment will be described. In such a positioning method, the jig 100 for the water plasma generator shown in FIG. 8 (hereinafter, referred to as “jig 100”) is used. FIG. 8 is an explanatory diagram of a positioning method using a jig. As shown in FIG. 8, the jig 100 is formed by axial bodies having stepwise different thicknesses (cross-sectional shapes orthogonal to the extending direction). The jig 100 includes a cathode position adjusting unit 101, an anode position adjusting unit 102, and a gripping unit 103. In the present embodiment, the cathode position adjusting portion 101, the anode position adjusting portion 102, and the grip portion 103 are each extended in the shape of a round bar having a circular cross-sectional shape, and their central axis positions are arranged in the same manner.

The cathode position adjusting unit 101 is formed so that the cross-sectional shape orthogonal to the extending direction is substantially the same as or slightly smaller than the opening shape of the injection port 75. In the present embodiment, since the injection port 75 is formed in the shape of a round hole and the cathode position adjusting portion 101 is formed in the shape of a round bar, their diameters are substantially the same or the diameter of the cathode position adjusting portion 101 is slightly smaller. It is formed to the dimensions. As a result, the cathode position adjusting unit 101 can be inserted into the injection port 75, and in the inserted state, the cathode position adjusting unit 101 inserted into the injection port 75 intersects the extending direction in the front-rear direction and the left-right direction. The occurrence of rattling is suppressed.

The cathode position adjusting unit 101 extends linearly in a predetermined direction with the anode position adjusting unit 102 side (front side in FIG. 8) as the base end and the opposite side (rear side in FIG. 8) as the tip end. The length of the cathode position adjusting portion 101 in the extending direction is the front-rear direction from the front outer surface of the injection port forming plate 74 near the injection port 75 of the chamber 17 to the front end (one end) of the cathode 16 which is an appropriate front-rear position. Same as length. Therefore, the cathode 16 is in an appropriate front-rear position in a state where the base end of the cathode position adjusting portion 101 is aligned with the front outer surface of the injection port forming plate 74 and the front end of the cathode 16 is in contact with the tip of the cathode position adjusting portion 101.

The anode position adjusting unit 102 is provided so as to be connected to the base end of the cathode position adjusting unit 101. The anode position adjusting unit 102 is formed to have a diameter larger than the opening diameter of the cathode position adjusting unit 101 and the injection port 75. In other words, the anode position adjusting unit 102 is provided so as to protrude from the outer peripheral surface of the cathode position adjusting unit 101 in a direction orthogonal to (intersecting) the extending direction. As a result, when the cathode position adjusting portion 101 is inserted into the injection port 75, the anode position adjusting portion 102 can come into contact with the front outer surface of the injection port forming plate 74, and the contact causes the entire jig 100 to move backward. Functions as a regulating stopper.

The diameter of the anode position adjusting unit 102 is such that the anode position adjusting unit 102 is located on the upper end surface (end surface on the injection port 75 side) of the anode 18 which is in an appropriate vertical position when the cathode position adjusting unit 101 is inserted into the injection port 75. It is the position where the lowermost end of is in contact. Therefore, the cathode position adjusting unit 101 is inserted into the injection port 75, and the anode 18 is in an appropriate vertical position in a state where the lowermost end of the anode position adjusting unit 102 is in contact with the upper end surface of the anode 18 outside the chamber 17. ..

The grip portion 103 is provided at a position opposite to the cathode position adjusting portion 101 in the anode position adjusting portion 102. The grip portion 103 is formed to have a diameter larger than that of the anode position adjusting portion 102, or has irregularities on the surface so that the operator can easily grip the grip portion 103.

When positioning the cathode 16 using the jig 100, the cathode position adjusting portion 101 is inserted into the injection port 75, and the end surface of the anode position adjusting portion 102 is brought into contact with the front outer surface of the injection port forming plate 74. As a result, the front and rear positions of the front outer surface of the injection port forming plate 74 and the base end of the cathode position adjusting portion 101 coincide with each other. In this state, the cathode 16 is displaced in the front-rear direction, and the front end of the cathode 16 is brought into contact with the tip of the cathode position adjusting portion 101, so that the cathode 16 can be positioned at an appropriate front-rear position.

Then, while maintaining the state in which the cathode position adjusting portion 101 is inserted into the injection port 75, the anode 18 is displaced in the vertical direction, and the upper end surface of the anode 18 is brought into contact with the lowermost end of the anode position adjusting portion 102. 18 can be positioned at an appropriate front-rear position.

In this way, by using the jig 100 of the present embodiment, the front end of the cathode 16 on the arc discharge AR generation side and the upper position of the anode 18 on the arc discharge AR generation side are set to appropriate positions. Can be positioned. In such positioning, as compared with the positioning visually by the operator, the position accuracy can be improved while simplifying the work, and the output of the arc discharge AR can be stabilized. In addition, the work can be simplified and performed in a short time as compared with positioning using a ruler or a scale.

Subsequently, a method of generating water plasma by the water plasma generator 12 of the present embodiment will be described. Such a generation method is carried out in the order of the holding step, the vortex water flow forming step, and the injection step described below.

First, in the holding step, the insertion shaft portion 61 of the energizing member 60 is passed through the injection port 75 and inserted, and the rear end (one end of the energizing member 60) of the insertion shaft portion 61 is brought into contact with the front end (one end) of the cathode 16. Make it a state. At this time, the holding shaft portion 63 of the energizing member 60 is arranged above the chamber body 70, and the rear end (the other end of the energizing member 60) of the holding shaft portion 63 is in a state of facing the auxiliary anode portion 40. In such a state, after the holding member 42 is lifted by a fingertip or the like against the elastic force of the elastic member 43, the rear end of the holding shaft portion 63 is arranged between the contact piece portion 42c of the holding member 42 and the base 41. do. From this state, the holding member 42 is released from being lifted, and the holding shaft portion 63 is sandwiched and held by the contact piece portion 42c and the base 41 by the elastic force of the elastic member 43. As a result, the energizing member 60 is held by the auxiliary anode portion 40.

After performing the holding step, in the vortex flow forming step, a vortex flow is formed inside the chamber 17. Since the formation of such a vortex water flow has been described above, the description here will be omitted.

After carrying out the vortex water flow forming step, in the injection step, the switch 48 shown in FIG. 7A is turned on while maintaining the formation of the vortex water flow, and the voltage from the DC power supply 47 is applied to the anode 18, the auxiliary anode portion 40 and the cathode 16. Then, the energizing member 60 connecting the auxiliary anode portion 40 and the cathode 16 is instantaneously energized, and the energizing member 60 is instantly vaporized (evaporated) by the heat generated by the energization. By vaporizing in this way, the current between the auxiliary anode portion 40 and the cathode 16 can be induced between the anode 18 and the cathode 16, and as shown in FIG. 7B, the arc discharge AR is applied to the anode 18 and the cathode 16. (See FIG. 5) occurs. Since the arc discharge AR passes through the inside of the cavity formed in the vortex water flow, the plasma water for forming the vortex water flow is dissociated and ionized, and the jet stream J of the water plasma having high energy is injected from the injection port 75.

According to the above embodiment, by using the auxiliary anode portion 40 and the energizing member 60 as described above, the anode 18 and the cathode 16 are generated by the current flowing through the energizing member 60 immediately after or substantially at the same time as the vaporization of the energizing member 60. The arc discharge AR can be generated during the period. In other words, the energizing member 60 that is vaporized by energization can be used as a trigger for the arc discharge AR. As a result, even if the anode 18 and the cathode 16 are separated from each other as in the water plasma generator 12, the arc discharge AR can be easily and stably generated, and the start-up preparation time of the water plasma generator 12 can be shortened. The start-up work can be facilitated.

Further, since the energizing member 60 has a shaft shape having the above-mentioned shape, one end (rear end of the insertion shaft portion 61) is in contact with the cathode 16 and the other end (rear end of the holding shaft portion 63) is the auxiliary anode portion 40. The auxiliary anode portion 40 and the cathode 16 can be electrically connected to each other.

Further, since the auxiliary anode portion 40 has the elastic member 43, it is possible to avoid the displacement of the energizing member 60 sandwiched between the base 41 and the sandwiching member 42 and to stabilize the electrical connection in the energizing member 60. ..

Further, since the holding member 42 has the rising portion 42d, the rising portion 42d can be used as a gripping allowance with a fingertip when the holding member 42 is lifted and operated.

Further, since both the cathode 16 and the anode 18 can be easily positioned by using the jig 100 as described above, the position of the energizing member 60 that brings the insertion shaft portion 61 into contact with the cathode 16 becomes constant, and the arc discharge occurs. It can contribute to the stabilization of the trigger generation of AR.

The present invention is not limited to the above embodiment, and can be modified in various ways. In the above embodiment, the size, shape, direction, etc. shown in the attached drawings are not limited to this, and can be appropriately changed within the range in which the effects of the present invention are exhibited. In addition, it can be appropriately modified and implemented as long as it does not deviate from the scope of the object of the present invention.

For example, in the method for generating water plasma of the above embodiment, the holding step is carried out after the vortex water flow forming step, but it may be carried out before the vortex water flow forming step.

Further, the material of the energizing member 60 may be a metal or alloy other than the above-mentioned alloy containing aluminum, for example, tungsten or an alloy containing tungsten, as long as it can be vaporized before the generation of the arc discharge AR.

Further, the water plasma generator 12 is not limited to being used for decomposition treatment of waste and the like, and can be used for arbitrary treatment using water plasma such as thermal spraying.

The present invention has the effect that an arc discharge can be easily generated between the anode and the cathode in order to inject water plasma.

12 Water plasma generator 16 Cathode 17 Chamber 18 Anode 40 Auxiliary anode 41 Base 42 Holding member 42c Contact piece 42d Rising part 43 Elastic member 60 Energizing member 61 Insertion shaft 62 Connecting shaft 63 Holding shaft 75 Injection port AR arc Discharge

Claims (5)

A water plasma generator that injects water plasma by passing an arc discharge inside the vortex water flow.
A chamber in which the vortex water flow is formed internally to inject the water plasma from the injection port,
An anode provided on the outside of the chamber in the vicinity of the injection port,
One end side is inserted into the chamber, and a cathode that generates an arc discharge that passes through the vortex water flow is provided between the anode and the anode.
An auxiliary anode portion electrically connected in parallel with the anode is provided on the outer peripheral side of the chamber, and the auxiliary anode portion holds an energizing member that contacts one end of the cathode and passes through the injection port. A water plasma generator, which is provided so as to be able to energize with the energizing member. The auxiliary anode portion includes a base attached to the outer peripheral side of the chamber, a holding member that sandwiches the base and the energizing member, and an elastic member that applies a force that presses the holding member to the base side. The water plasma generator according to claim 1. The elastic member is formed by a strip-shaped leaf spring, and one end thereof is connected to the base and the other end is connected to the holding member.
The holding member includes a contact piece portion provided in parallel along the base and a rising portion extending from the side of the contact piece portion opposite to the elastic member in a direction intersecting with the base. The water plasma generator according to claim 2. An energizing member used in the water plasma generator according to any one of claims 1 to 3.
An insertion shaft portion that comes into contact with one end of the cathode and passes through the injection port,
The holding shaft portion held by the auxiliary anode portion and
An energizing member used in a water plasma generator, which is formed of a shaft-shaped body including an insertion shaft portion and a connecting shaft portion that connects the holding shaft portion. A water plasma generation method using the water plasma generator according to any one of claims 1 to 3.
A holding step of holding the energizing member in the auxiliary anode portion in a state where the energizing member is passed through the injection port and brought into contact with one end of the cathode.
Before and after the holding step, a vortex water flow forming step of forming the vortex water flow inside the chamber, and a vortex water flow forming step.
After the vortex flow forming step, a voltage is applied to the anode, the auxiliary anode portion and the cathode to energize the energizing member, and the energizing member is vaporized by the heat generated by the energization to be between the anode and the cathode. A method for generating water plasma, which comprises generating an arc discharge, passing the arc discharge through the inside of the vortex water flow, and injecting the water plasma.

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