WO2020096048A1

WO2020096048A1 - Decomposition treatment apparatus

Info

Publication number: WO2020096048A1
Application number: PCT/JP2019/043902
Authority: WO
Inventors: 博文矢口
Original assignee: 株式会社Ｈｅｌｉｘ
Priority date: 2018-11-08
Filing date: 2019-11-08
Publication date: 2020-05-14
Also published as: JP7420197B2; JP2023017815A; JP7171082B2; JPWO2020096048A1

Abstract

The purpose of the present invention is to increase the efficiency of decomposition treatment by water plasma. A decomposition treatment apparatus (10) includes a supply device (13) that supplies an object to be decomposed to a jet stream of water plasma ejected by a water plasma generation device (11). The water plasma generation device includes a chamber (17) for forming a vortex water flow therein to spray water plasma from an ejection port (75), and an anode (18) and a cathode (16) for generating an arc discharge passing through the vortex water flow in the chamber. The anode is provided at a position near the ejection port outside the chamber. The supply device includes a main body (45) which is formed into a tubular shape extending in the ejection direction of water plasma and into which water plasma is introduced, and a material supply path (46) for supplying an object to be decomposed into the main body. The supply device is provided separately from the chamber and outside the chamber.

Description

Disassembly processor

The present invention relates to a decomposition treatment device for injecting water plasma by an arc discharge generated between a cathode and an anode to decompose an object to be decomposed.

The device described in Patent Document 1 is known as a device for treating wastes using water plasma. In the apparatus of Patent Document 1, water is used as a plasma stabilizing medium, and incineration ash is supplied to a water plasma jet stream generated by arc discharge to dissolve the incineration ash. In Patent Document 1, a water plasma jet air stream is emitted from an injection port of a water plasma burner, and a supply unit for supplying incineration ash from above the water plasma jet air flow is provided at a position apart from the injection port by a predetermined distance. ..

Japanese Patent No. 3408779

In the device of Patent Document 1, since the water plasma jet stream becomes super-high-speed and is jetted into the open space, there is a problem that the incinerated ash supplied is easily separated from the water plasma jet stream and scattered. For this reason, the incineration ash cannot be sufficiently decomposed by the heat of the water plasma jet stream, and the decomposition ability decreases, so there is room for improvement in the decomposition ability.

The present invention has been made in view of the above points, and an object of the present invention is to provide a decomposition treatment device capable of improving the efficiency of decomposition treatment by water plasma.

The decomposition treatment apparatus of the present invention comprises a water plasma generator for injecting water plasma by passing an arc discharge inside a vortex water flow, and a supply device for supplying a decomposition object to a jet stream of the water plasma, A decomposition processing device for decomposing the decomposition target by water plasma, wherein the water plasma generation device includes a chamber for forming the vortex water flow inside and ejecting the water plasma from an injection port; An anode and a cathode for generating an arc discharge passing through the vortex water flow, the anode being provided outside the chamber in the vicinity of the injection port, and the supply device extending in the injection direction of the water plasma. A main body formed in a tubular shape and into which the water plasma is introduced, a cooling unit that cools the main body, and the decomposition target is supplied to the inside of the main body. A that material supply passage, characterized in that provided outside of said chamber remote from said chamber.

According to the present invention, when using the water plasma generator in which the anode is provided outside the chamber, the decomposition target can be supplied to the inside of the cylindrical main body of the supply device while introducing the water plasma. .. Therefore, the decomposition target can be decomposed inside the main body which is the enclosed space so as not to scatter at an extremely high temperature. As a result, the certainty of decomposition of the decomposition target object is increased, and the decomposition can be efficiently performed.

It is a side view of the decomposition processing apparatus concerning a 1st embodiment. It is the side view which carried out partial cross-section of the container and the supply apparatus. 3A is a view of the container and the supply device as viewed from the rear, and FIG. 3B is a view of the container as viewed from the front. It is a schematic perspective view of a supply apparatus. FIG. 5 is a sectional view taken along line AA of FIG. 4. FIG. 5 is a sectional view taken along line BB of FIG. 4. It is a sectional side view of a chamber. It is a plane sectional view of a chamber. It is a longitudinal cross-sectional view of a chamber. It is an explanatory view of decomposition processing of hazardous waste. It is the schematic perspective view which carried out the cross-sectional side view of the supply apparatus which concerns on 2nd Embodiment. It is a sectional side view of the supply device concerning a 2nd embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that each configuration according to the embodiment is not limited to the configuration shown below, and can be changed as appropriate. In addition, in the following drawings, a part of the configuration may be omitted for convenience of description.

[First Embodiment]
FIG. 1 is a side view of the decomposition processing apparatus according to the first embodiment. In the following description, “upper”, “lower”, “left”, “right”, “front”, and “rear” are used with the directions indicated by arrows in each drawing as references, unless otherwise specified. However, the orientation of each configuration in each of the following embodiments is merely an example, and can be changed to any orientation.

FIG. 1 is an explanatory diagram showing a partial side cross-section of the disassembling apparatus according to the first embodiment. As shown in FIG. 1, the decomposition treatment device 10 is configured to include a water plasma generation device 11, a cover member 12, and a supply device 13.

The water plasma generator 11 is supported at a predetermined height position via a stand 15. The water plasma generator 11 includes a cathode 16 extending in the front-rear direction, a chamber 17 into which the front end side of the cathode 16 is inserted, an iron disk-shaped anode 18 provided outside the chamber 17 and obliquely downward and forward, and an anode 18 And an anode support portion 19 that supports the anode.

The cathode 16 is formed of a round bar made of carbon, and can be 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 in the front-rear direction 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 a supply pump 26, and plasma water is supplied to the chamber 17 via a high-pressure pump 27. Part of the plasma water is jetted as water plasma from the front end side of the chamber 17. The cooling water supplied to the chamber 17 and the plasma water that has not been jetted 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 having absorbed heat in the anode 18 is sucked via the vacuum pump 28. The detailed configuration of the chamber 17 will be described later.

A wall 30 is arranged in front of the water plasma generator 11, and a space between the wall plasma 30 where the water plasma generator 11 is installed and a processing space 31 for processing an object gasified by water plasma. The airtightness is maintained. Although not shown, in the processing space 31, for example, highly alkaline water is injected by a shower device to neutralize the gasified acid gas. A tubular cover member 12 is provided so as to penetrate the wall body 30.

The cover member 12 is arranged in front of the water plasma generation device 11 and is provided so as to cover the jet stream of the water plasma ejected from the water plasma generation device 11. The penetrating portion of the cover member 12 in the wall body 30 is entirely welded so that the wall member 30 holds the cover member 12 and maintains airtightness between them.

The cover member 12 includes a cylindrical body portion 33 formed in a cylindrical shape, a rear opening forming portion 34 formed on the rear end side of the cylindrical body portion 33 (on the side of the water plasma generator 11), and a front end of the cylindrical body portion 33. The front opening forming portion 35 formed on the side (the side opposite to the water plasma generation device 11). The axial direction of the cylinder main body 33 is inclined so as to become lower as the distance from the water plasma generator 11 increases.

FIG. 2 is a side view in which the container and the supply device are partially sectioned. As shown in FIG. 2, the cylinder main body 33, the rear opening forming portion 34, and the front opening forming portion 35, which form the cover member 12, have a double structure, and a single unit through which the cooling water flows within its thickness. A space 36 is formed. A supply passage 38 and a discharge passage 39 for cooling water communicate with the space 36. The supply passage 38 is provided on the front lower end side of the tube main body 33, and the discharge passage 39 is formed on the upper end side of the rear opening forming portion 34. In the cover member 12, cooling water is supplied from the supply passage 38 via a pump (not shown) and introduced into the space 36. Then, the heat generated by the water plasma is absorbed by the cooling water flowing from the supply passage 38 to the discharge passage 39 in the space 36, and the cooling action of the cover member 12 is obtained.

3A is a view of the container and the supply device as viewed from the rear, and FIG. 3B is a view of the container as viewed from the front. As shown in FIG. 3A, the opening 34 a formed in the rear opening forming portion 34 is formed in an opening shape corresponding to the shape of the supply device 13 so as to accommodate a part of the supply device 13. As shown in FIG. 3B, the opening 35a formed in the front opening forming portion 35 is formed in the upper half region of the front opening forming portion 35, and the lower end portion extends along the horizontal direction. Therefore, as shown in FIG. 1, the storage space 41 is formed in the lower corner portion of the front opening forming portion 35 and the cylinder body 33 in the cover member 12. Hazardous waste that has not been decomposed by water plasma is stored in the storage space 41, and is discharged through a passage 42 that penetrates the lower portion of the front opening forming portion 35.

FIG. 4 is a schematic perspective view of the supply device. The supply device 13 has a cylindrical main body portion 45 extending in the front-rear direction, and granular, powdery, or liquid hazardous waste (decomposition target) connected to the main body portion 45 inside the main body portion 45. And a material supply path 46 for supplying the material. Further, the supply device 13 includes a cooling unit 47 that cools the main body 45 and a part of the material supply passage 46.

FIG. 5 is a sectional view taken along the line AA of FIG. As shown in FIG. 5, the main body part 45 is formed in a double cylinder shape including an inner cylinder part 50 forming an inner peripheral surface and an outer cylinder part 51 forming an outer peripheral surface. The front and rear ends of the inner tubular portion 50 are formed by tapered surfaces 50a that approach the central axis of the main body 45 from the front and rear ends toward the center. The tapered surface 50 a is formed in a curved shape so as to bulge toward the central axis of the main body 45.

6 is a sectional view taken along the line BB of FIG. As shown in FIG. 6, the material supply path 46 is formed in a cylindrical shape extending in the up-down direction, and the upper end of the material supply path 46 penetrates the outer tubular portion 51 of the main body portion 45 to open inside the inner tubular portion 50 to communicate with each other. is doing. The upper end of the material supply path 46 has an oval or elliptical shape and is opened so as to be elongated in the front-rear direction (see FIG. 5). The communicating portion between the upper end of the material supply passage 46 and the inner cylindrical portion 50 is completely welded, and the airtightness and liquidtightness between them are maintained.

The lower end of the material supply path 46 is connected to the delivery device 53 (see FIG. 2) via a pipe or the like (not shown), and granular, powdery, or liquid hazardous waste is discharged from the delivery device 53 to the material supply path 46. Sent to. The hazardous waste sent to the material supply passage 46 is supplied to the inside of the main body portion 45 from the upper end portion of the material supply passage 46. It should be noted that the hazardous waste discharged from the passage 42 (see FIG. 2) of the cover member 12 is also reintroduced into the material supply passage 46 via a circulation means (not shown).

Returning to FIG. 4, the cooling unit 47 includes a connection pipe 55 that penetrates the upper end side of the material supply passage 46, a supply pipe 56 that communicates with the connection pipe 55 and extends in the left-right direction, and an outer cylindrical portion 51 of the main body portion 45. A discharge pipe 57 communicating with the front side is provided.

The discharge pipe 57 is provided in a shape in which one pipe member is bent at two positions in a substantially perpendicular direction. In other words, the discharge pipe 57 has a transverse portion 57a whose one end (left end portion) is connected to the main body portion 45 and extends in the left-right direction, and a retreat portion 57b which extends rearward from the other end portion (right end portion) of the transverse portion 57a. And a hanging portion 57c extending downward from the rear end of the retreat portion 57b. One end (the left end) of the transverse portion 57a communicates with an opening at an upper position on the front outer peripheral portion of the outer tubular portion 51 of the main body portion 45. The communicating portion between one end of the transverse portion 57a and the outer tubular portion 51 is wholly welded, and liquid tightness between them is maintained.

As shown in FIG. 6, the connecting pipe 55 is provided so as to cover the upper part of the material supply path 46 with a gap between the outer peripheral side and the outer peripheral side. The space between the connection pipe 55 and the material supply path 46 communicates with the space between the inner tubular portion 50 and the outer tubular portion 51 of the main body portion 45, and cooling fluid flows through these spaces. It is defined as a space 59. Therefore, the cooling unit 47 is configured to include the cooling space 59 and the inner tubular portion 50 and the outer tubular portion 51 that form the cooling space 59. The cooling space 59 is formed in a region extending from the main body portion 45 to a connection portion of the material supply passage 46 with the main body portion 45, that is, an upper region of the material supply passage 46.

The entire connecting portion between the upper end portion of the connecting pipe 55 and the outer tubular portion 51 is welded, and liquid tightness is maintained between them. The lower end of the connecting pipe 55 is connected to the outer peripheral surface of the material supply passage 46 by welding or the like so as to maintain the blocking property.

The one end (right end) of the supply pipe 56 communicates with the connection pipe 55 while opening to the outer periphery of the lower end of the connection pipe 55. The communicating portion between one end of the supply pipe 56 and the connection pipe 55 is completely welded, and liquid tightness is maintained between them.

In the cooling unit 47, cooling water is supplied from the supply pipe 56 via a pump (not shown) and introduced into the cooling space 59. Then, the cooling water flows from the supply pipe 56 to the discharge pipe 57 through the cooling space 59. Due to the flow of the cooling water, the heat generated by the water plasma is absorbed in the main body portion 45 and the upper region of the material supply passage 46, and a cooling action for them is obtained.

Returning to FIG. 2 and FIG. 3, the supply device 13 is supported on the rear surface of the rear opening forming portion 34 of the cover member 12 via the support portion 60. Here, the connection pipe 55 and the hanging portion 57c (not shown in FIG. 2) of the supply device 13 extend in the vertical direction, and the front and rear positions of their front ends are the same (see FIG. 5). Therefore, the front ends of the connecting pipe 55 and the hanging portion 57c can be arranged so as to be in line contact with the rear surface of the rear opening forming portion 34, respectively, and by supporting the supporting portion 60 in this state, the supply device 13 can be positioned in the front-rear direction. Become.

The support portion 60 includes a plate-shaped pressing member 61 extending in the left-right direction, and fastening members 62 provided on both sides in the extending direction of the pressing member 61. The fastening member 62 is formed of a bolt or the like, and is provided so as to penetrate the holding member 61 and be screwed into the rear opening forming portion 34. The pressing member 61 is in contact with the connection pipe 55 of the supply device 13 and the rear end of the hanging portion 57c, and by tightening the fastening member 62 in this contact state, the connection member is connected to the rear opening forming portion 34. 55 and the hanging portion 57c are sandwiched to support the supply device 13. On the other hand, by releasing the fastening of the fastening member 62 from this state, the pressing member 61 and the supply device 13 can be separated from the rear opening forming portion 34, and the supply device 13 can be removed from the cover member 12. In other words, the support part 60 allows the supply device 13 to be detachably supported by the cover member 12.

Next, the internal structure of the chamber 17 will be described with reference to FIGS. 7 to 9. 7 is a side sectional view of the chamber, FIG. 8 is a plan sectional view of the chamber, and FIG. 9 is a longitudinal sectional view of the chamber.

As shown in FIGS. 7 and 8, the chamber 17 constituting the water plasma generator 11 includes a chamber body 70 forming a cylindrical inner peripheral surface extending in the front-rear direction, and a front wall portion mounted in front of the chamber body 70. 71, 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. The ejection port forming plate 74 is formed with an ejection port 75 for ejecting water plasma.

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

A cooling water supply passage 80 and a cooling water discharge passage 81 (not shown in FIG. 8) are formed behind the rib 70a of the chamber body 70. The 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 passage 77, the cooling water supply passage 80, and the cooling water discharge passage 81 are formed in the shape of a round hole that is the inner peripheral surface of the cylinder.

As shown in FIG. 9, the plasma water supply passage 77 communicates with the lower portion of the internal space 72, which is circular in a longitudinal sectional view, and extends in the left-right direction. Specifically, the plasma water supply passage 77 extends in the lower tangential direction of the internal space 72. As a result, the plasma water flowing from the plasma water supply passage 77 smoothly flows along the circumferential direction of the internal space 72.

The water plasma generator 11 includes a substantially cylindrical vortex water flow generator 90 housed in the chamber 17. The swirl flow generator 90 is arranged so that the internal space 72 and the central axis line 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 longitudinal sectional view, the internal space 72 forms a circular space between its inner peripheral surface and the outer peripheral surface of the vortex water flow generator 90, and the plasma water flowing into the internal space 72 as described above has a circular shape. It flows like turning in the space.

A plurality of passages 91 are formed in the eddy water flow generator 90 so as to communicate with each other inside and outside. The passages 91 are formed in the circumferential direction of the vortex water flow generator 90 at equal angles (every 120 ° in this embodiment). The passages 91 are formed at predetermined intervals in the front-rear direction (see FIGS. 7 and 8). Each passage 91 extends in a direction inclined with respect to the thickness direction of the vortex water flow generator 90. Specifically, each passage 91 extends in the inner circumferential tangential direction of the vortex water flow generator 90 at the communicating 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 eddy 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 flows into the vortex water flow generator 90 through the passage 91. 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 circular shape is formed so as to form a cavity at the central axis position C1 in a longitudinal sectional view. .. Then, an arc discharge AR (see FIG. 10) is generated between the anode 18 and the cathode 16 so as to pass through the inside of the cavity formed in the swirling water flow.

The water plasma generator 11 further includes various configurations inside the chamber 17 behind the vortex water flow generator 90. With such a configuration, positioning of the vortex water flow generator 90, cooling of the cathode 16, holding and movement control, power supply to the cathode 16 and the like are performed, but description thereof will be omitted here.

Next, a method for decomposing hazardous waste by the decomposing device 10 of the present embodiment will be described with reference to FIG. FIG. 10 is an explanatory diagram of decomposition processing of hazardous waste. Here, as shown in FIG. 10, the anode 18 is provided such that the upper end thereof is located outside the chamber 17 and in the vicinity of a diagonally lower front of the injection port 75. Further, the supply device 13 is provided apart from the front outside the chamber 17, and is arranged so that the central axis position of the main body portion 45 and the central axis position of the injection port 75 are arranged substantially in the same straight line. ..

When DC power is supplied to the cathode 16 and the anode 18 in the state where the vortex water flow having the cavity is formed as described above, the arc discharge AR is generated between them. At this time, the arc discharge AR is generated so as to pass through the vortex water flow cavity. When the arc discharge AR is generated, the jet stream J of water plasma that becomes high energy by dissociating and ionizing the plasma water that forms the vortex water stream is jetted from the jet port 75.

The jet stream J of the water plasma jetted from the jet port 75 becomes an extremely high-temperature and ultra-high-speed fluid, and is introduced into the main body 45 arranged in front of the jet port 75 of the chamber 17. At this time, the jet direction of the jet stream J of the water plasma is along the front-rear direction, and the cylindrical main body portion 45 also extends along the front-rear direction, so that the jet air stream J is satisfactorily introduced into the main body portion 45. Further, in the supply device 13, the hazardous waste is supplied into the main body portion 45 through the material supply passage 46. Then, the jet waste stream J of the water plasma introduced into the main body 45 decomposes the hazardous waste supplied into the main body 45.

Here, examples of hazardous wastes include PCB, sulfuric acid pitch, asbestos, freons, halons, tires, various kinds of dust, and the like, which are supplied in the form of particles, powder, or liquid through the supply device 13. Even if such hazardous waste is input, it can be decomposed into detoxified waste.

The cover member 12 (see FIG. 2) is heated during the process of decomposing hazardous waste, but it can be cooled and used by passing cooling water within its thickness. Further, even in the main body portion 45 and the material supply path 46 of the supply device 13, since they are positioned in the jet stream J of water plasma or close to the jet stream J, they are heated by receiving a large amount of energy. However, since the cooling space 59 of the cooling unit 47 is formed in the heated portion and the cooling water can be passed through the cooling space 59 to be cooled, damage due to heating can be effectively suppressed.

According to the above-described first embodiment, when decomposing hazardous waste by the water plasma injected from the chamber 17, the hazardous waste can be supplied while introducing the water plasma into the cylindrical main body 45. it can. As a result, it is possible to prevent the scattering of the hazardous waste supplied in the space surrounded by the main body portion 45, and to supply the hazardous waste to a particularly high temperature portion of the water plasma to perform decomposition treatment under favorable conditions. be able to. As a result, the supplied hazardous waste can be efficiently decomposed into gasified waste, and the reliability of the decomposition can be increased.

Further, since the supply device 13 is detachably supported by the cover member 12 via the support portion 60, the supply device 13 can be positioned with a simple structure using the cover member 12, and the supply device 13 can be replaced, etc. Can be done easily. Thus, by preparing a plurality of supply devices 13 having different diameters and lengths of the main body 45 and different diameters of the material supply path 46, it is possible to cope with various conditions such as hazardous waste.

Further, since the tapered surface 50a is formed on the inner peripheral surface of the main body portion 45 into which the water plasma is introduced, the jet stream J of the water plasma can be guided to the central axis position side of the main body portion 45. Also, the hazardous waste can be decomposed efficiently.

In addition, since the shape of the opening in the material supply path 46 to the main body 45 is elongated in the jet direction of the water plasma, it is possible to concentrate the hazardous waste in the central position of the water plasma and decompose the hazardous waste better at high temperatures. Can be processed. The opening shape is not limited to an oblong or elliptical shape elongated in the front-rear direction, and may be a circular shape, a square shape, a rectangular shape, or an elongated shape in the left-right direction as long as hazardous waste can be decomposed. ..

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 11 and 12. In the following description, the same reference numerals may be used for the same or equivalent components as in the first embodiment, and the description may be omitted or simplified.

FIG. 11 is a schematic perspective view of a side cross-sectional view of the supply device according to the second embodiment. FIG. 12 is a side cross-sectional view of the supply device according to the second embodiment. As shown in FIGS. 11 and 12, in the second embodiment, the supply port forming body 100 is detachably provided at the upper end portion of the material supply passage 46 in comparison with the first embodiment. The supply pipe 56 is not shown in FIGS. 11 and 12.

The supply port forming body 100 is provided in a shape obtained by processing a hexagon socket set screw. The supply port forming body 100 has a shaft portion 101 in which a hexagonal hole 101a is formed in the upper portion and a central axis is directed in the vertical direction, and a male screw portion 102 formed on the outer peripheral surface of the shaft portion 101 (screw irregularities are not shown). ) And.

A tapered recess 103 that gradually expands downward is formed at the lower end of the shaft 101. A channel 104 through which harmful waste (decomposition target) flows is formed at a position where the central axis of the shaft 101 overlaps between the upper end of the recess 103 and the bottom of the hexagonal hole 101a. In the second embodiment, the flow path 104 is formed in a round hole shape.

A female screw portion 106 (thread unevenness is not shown) that is screwed into the male screw portion 102 is formed on the inner peripheral surface of the upper end portion (end portion on the main body portion 45 side) of the material supply passage 46. The vertical length of the female screw portion 106 is formed to be substantially the same as the vertical length of the male screw portion 102 (shaft portion 101), and a step portion 107 on which the lower end portion of the shaft portion 101 is seated is formed on the lower end side of the female screw portion 106. Has been formed. Therefore, the supply port forming body 100 is provided so as not to protrude from the inner peripheral surface of the inner tubular portion 50 and the upper end of the material supply passage 46 in a state in which the lower end of the shaft portion 101 is screwed into contact with the step portion 107.

A ring-shaped elastic body 108 is provided in the groove formed in the step portion 107. Since the lower end of the shaft portion 101 is pressed against the elastic body 108, the airtightness and liquid-tightness of the supply port forming body 100 and the material supply path 46 are kept good, and between the male screw portion 102 and the female screw portion 106. Can be prevented.

According to the second embodiment described above, by inserting a tool into the hexagonal hole 101a and rotating the tool, the supply port forming body 100 that is screwed into the material supply path 46 can be made detachable. The formed body 100 can be easily replaced. As a result, even if the flow path 104 or the supply port forming body 100 is contaminated over time due to the decomposition processing of the hazardous waste, it can be dealt with by replacing the other supply port forming body 100, and the maintenance can be facilitated. Can be planned.

Further, various flow paths 104 can be selected by preparing a plurality of supply port forming bodies 100 having different opening shapes and opening sizes of the flow paths 104. This makes it possible to adjust the supply amount and supply mode of the hazardous waste through the flow path 104 and efficiently and surely decompose various hazardous wastes. As the opening shape of the flow path 104, it is possible to exemplify an elliptical shape that is elongated in the front-rear direction or the left-right direction, an elliptical shape, a square shape, or a rectangular shape.

Note that the present invention is not limited to the above embodiments, and can be implemented with various modifications. In the above-described embodiment, the size, shape, direction, etc. illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within the range where the effect of the present invention is exhibited. Other than the above, the present invention can be appropriately modified and implemented without departing from the scope of the object of the present invention.

For example, in each of the above-described embodiments, the material to be decomposed is supplied from below the main body portion 45 by the supply device 13 through the material supply passage 46. However, the material supply passage 46 is provided above the main body portion 45 and the decomposition target is supplied from above. An object to be decomposed may be supplied.

The structure for supporting the supply device 13 may be changed as long as the positional relationship with the chamber 17 can be positioned as described above. However, it is more advantageous to support the cover member 12 via the support portion 60 because the structure can be simplified.

Further, the object to be decomposed by the water plasma generation device 11 is not limited to the above-mentioned hazardous waste, and an object that is not particularly harmful may be an object to be decomposed.

Further, the water plasma generator 11 is not limited to being used for waste treatment, but can be used for any treatment using water plasma such as thermal spraying.

The present invention has an effect that an object to be decomposed can be efficiently decomposed by water plasma injected from a water plasma generator.

This application is based on Japanese Patent Application No. 2018-210462 filed on November 8, 2018. All of this content is included here.

Claims

A water plasma generator that injects water plasma by passing an arc discharge inside the vortex water flow,
A decomposition processing apparatus comprising: a supply device that supplies a decomposition target to the jet stream of the water plasma, wherein the decomposition target is decomposed by the water plasma.
The water plasma generation device includes a chamber that internally forms the vortex water flow and injects the water plasma from an injection port, and an anode and a cathode that generate an arc discharge that passes through the vortex water flow in the chamber. The anode is provided outside the chamber in the vicinity of the injection port,
The supply device is formed into a tubular shape extending in the jet direction of the water plasma, a main body portion into which the water plasma is introduced, a cooling unit that cools the main body portion, and the decomposition unit inside the main body portion. A decomposition treatment apparatus, comprising: a material supply path for supplying an object; and provided outside the chamber away from the chamber.
The material supply path is connected to the main body,
The cooling unit includes a cooling space in which cooling water flows, and the cooling space is formed in a region that extends between the main body and a connection point of the material supply path with the main body. Item 2. The decomposition apparatus according to Item 1.
A cover member for covering the water plasma sprayed by the water plasma generator,
The decomposition processing apparatus according to claim 1 or 2, further comprising: a support portion that detachably supports the supply device on the cover member.
The inner peripheral surface of the main body, into which the water plasma is introduced, is formed by a taper surface that approaches the central axis of the main body as the distance from the injection port increases. The decomposition processing apparatus according to any one of 1.
A supply port forming body through which the decomposition target supplied from the material supply path to the main body flows is detachably provided at an end of the material supply path on the main body side. The decomposition processing apparatus according to any one of claims 1 to 4.
The male screw portion is formed on the outer peripheral surface of the supply port forming body, and the female screw portion that is screwed to the male screw portion is formed on the inner peripheral surface of the material supply passage. Disassembly processing equipment.