JP7420197B2 - Decomposition processing equipment - Google Patents

Description

The present invention relates to a decomposition treatment apparatus that decomposes a substance to be decomposed by injecting water plasma using an arc discharge generated between a cathode and an anode.

2. Description of the Related Art As an apparatus for treating waste using water plasma, an apparatus described in Patent Document 1 is known. In the apparatus of Patent Document 1, water is used as a plasma stabilizing medium, and the incinerated ash is supplied to a water plasma jet stream generated by arc discharge to dissolve the incinerated ash. In Patent Document 1, a water plasma jet stream is emitted from an injection port of a water plasma burner, and a supply means for supplying incinerated ash from above the water plasma jet stream is provided at a position a predetermined distance from the injection port. .

Patent No. 3408779

In the device of Patent Document 1, since the water plasma jet stream is extremely high-speed and is injected into an open space, there is a problem in that the supplied incinerated ash easily separates from the water plasma jet stream and scatters. For this reason, the incinerated ash cannot be sufficiently decomposed by the heat of the water plasma jet stream, resulting in a decrease in decomposition ability, so there is room for improvement in the decomposition ability.

The present invention has been made in view of these points, and an object of the present invention is to provide a decomposition treatment apparatus that can improve the efficiency of decomposition treatment using water plasma.

The decomposition treatment apparatus of the present invention includes a water plasma generation device that injects water plasma by passing an arc discharge inside a vortex water flow, and a supply device that supplies a decomposition target to the jet stream of the water plasma, A decomposition treatment apparatus that decomposes the object to be decomposed using water plasma, the water plasma generation apparatus comprising a chamber that forms the vortex water flow inside and injects 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 at a position outside the chamber near the injection port, and the supply device extending in the injection direction of the water plasma. A main body formed in a cylindrical shape into which the water plasma is introduced; a cooling unit that cools the main body; and a material connected to the main body and supplying the decomposition target into the main body. a supply path, provided outside the chamber away from the chamber, and the inner peripheral surface of the main body into which the water plasma is introduced approaches the central axis of the main body as it moves away from the injection port. The body portion is formed with a tapered surface, and the main body portion is formed in a double cylindrical shape including an inner cylindrical portion forming an inner peripheral surface and an outer cylindrical portion forming an outer peripheral surface. A connecting pipe is provided to cover the passage while forming a space between the main body and the main body in the material supply passage, and a cooling space through which cooling water flows. A space between the connecting pipe and the material supply path and a space between the inner cylinder part and the outer cylinder part communicate with each other. It is characterized by being formed .

According to the present invention, when using a water plasma generator in which the anode is provided outside the chamber, it is possible to supply the decomposition target while introducing water plasma into the interior of the cylindrical main body of the supply device. . Therefore, it is possible to decompose the object to be decomposed inside the main body, which is an enclosed space, at an extremely high temperature without scattering. This increases the certainty of decomposing the object to be decomposed, and allows the decomposition to be carried out efficiently.

FIG. 1 is a side view of the decomposition processing apparatus according to the first embodiment. FIG. 3 is a partially sectional side view of the container and the supply device. FIG. 3A is a diagram of the container and the supply device seen from the rear, and FIG. 3B is a diagram of the container seen from the front. FIG. 3 is a schematic perspective view of the supply device. 5 is a sectional view taken along line AA in FIG. 4. FIG. 5 is a sectional view taken along the line BB in FIG. 4. FIG. FIG. 3 is a side sectional view of the chamber. FIG. 3 is a plan cross-sectional view of the chamber. FIG. 3 is a longitudinal cross-sectional view of the chamber. It is an explanatory diagram of decomposition processing of hazardous waste. FIG. 7 is a schematic side sectional perspective view of a supply device according to a second embodiment. FIG. 7 is a side sectional view of a supply device according to a second embodiment.

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

[First embodiment]
FIG. 1 is a side view of a decomposition processing apparatus according to a first embodiment. In the following description, unless otherwise specified, "top", "bottom", "left", "right", "front", and "back" are used with reference to the direction indicated by the arrow in each figure. However, the orientation of each structure in each embodiment below is only an example, and can be changed to any orientation.

FIG. 1 is an explanatory diagram, partially in cross section, of the decomposition processing apparatus of the first embodiment. As shown in FIG. 1, the decomposition treatment apparatus 10 includes a water plasma generator 11, a cover member 12, and a supply device 13.

The water plasma generator 11 is supported at a predetermined height via a stand 15. The water plasma generator 11 includes a cathode 16 that extends back and forth, a chamber 17 into which the front end of the cathode 16 is inserted, an iron disc-shaped anode 18 that is provided outside the chamber 17 and diagonally downwardly forward, and an anode 18. The anode support section 19 supports the anode support section 19.

The cathode 16 is formed of a round rod made of carbon, and can be displaced in the front-rear direction via a feed screw shaft mechanism 21 to adjust the amount of insertion into the chamber 17. 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 part 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 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 also supplied via a high-pressure pump 27 . A portion of the plasma water is injected from the front end side of the chamber 17 as water plasma. The cooling water supplied to the chamber 17 and the plasma water that was not injected are sucked through the vacuum pump 28. Also in the anode support section 19 , cooling water flowing inside the anode 18 is supplied via the supply pump 26 , and the cooling water that has absorbed heat at 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 the wall 30 separates a space in which the water plasma generator 11 is installed and a processing space 31 in which objects gasified by water plasma are processed. Maintains airtightness. Although not shown in the processing space 31, for example, highly alkaline water is sprayed by a shower device to neutralize the gasified acidic gas. A cylindrical cover member 12 is provided to penetrate the wall 30 .

The cover member 12 is disposed in front of the water plasma generator 11 and is provided to cover a jet stream of water plasma ejected from the water plasma generator 11. The penetrating portion of the cover member 12 in the wall body 30 is entirely welded, so that the cover member 12 is held by the wall body 30 and airtightness is maintained between them.

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

FIG. 2 is a partially sectional side view of the container and the supply device. As shown in FIG. 2, the cylindrical body portion 33, the rear opening forming portion 34, and the front opening forming portion 35 that constitute the cover member 12 have a double structure, and have a single structure through which cooling water flows within the thickness. A space 36 is formed. A supply path 38 and a discharge path 39 for cooling water communicate with this space 36 . The supply path 38 is provided on the front lower end side of the cylinder body portion 33, and the discharge path 39 is formed on the upper end side of the rear opening forming portion 34. Cooling water is supplied to the cover member 12 from a supply path 38 via a pump (not shown) and introduced into the space 36 . The heat generated by the water plasma is absorbed by the cooling water flowing from the supply path 38 to the discharge path 39 in the space 36, and a cooling effect for the cover member 12 is obtained.

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

FIG. 4 is a schematic perspective view of the supply device. The supply device 13 has a main body 45 formed in a cylindrical shape extending in the front-rear direction, and is connected to the main body 45 to supply granular, powdery, or liquid hazardous waste (substances to be decomposed) into the main body 45. A material supply path 46 is provided. Further, the supply device 13 includes a cooling section 47 that cools the main body section 45 and a part of the material supply path 46.

FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. As shown in FIG. 5, the main body portion 45 is formed into a double cylindrical shape including an inner cylindrical portion 50 forming an inner circumferential surface and an outer cylindrical portion 51 forming an outer circumferential surface. Both front and rear ends of the inner cylindrical portion 50 are formed by tapered surfaces 50a that approach the central axis of the main body portion 45 from the front and rear ends toward the center. The tapered surface 50a is formed in a curved shape that swells toward the central axis of the main body portion 45.

FIG. 6 is a sectional view taken along line BB in FIG. 4. As shown in FIG. 6, the material supply path 46 is formed in a cylindrical shape extending in the vertical direction, and the upper end passes through the outer cylinder part 51 of the main body part 45 and communicates with the inside of the inner cylinder part 50 while opening. are doing. The upper end of the material supply path 46 has an oval or elliptical shape and is open so as to be elongated in the front-rear direction (see FIG. 5). The communication portion between the upper end of the material supply path 46 and the inner cylindrical portion 50 is entirely welded to maintain airtightness and liquidtightness therebetween.

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

Returning to FIG. 4, the cooling unit 47 includes a connecting pipe 55 through which the upper end side of the material supply path 46 is penetrated, a supply pipe 56 communicating with the connecting pipe 55 and extending in the left-right direction, and an outer cylinder part 51 of the main body part 45. A discharge pipe 57 communicating with the front side is provided.

The discharge pipe 57 is provided in a shape in which a single pipe member is bent at two positions substantially at right angles. In other words, the discharge pipe 57 includes a transverse part 57a whose one end (left end) is connected to the main body part 45 and extends in the left-right direction, and a retreated part 57b which extends rearward from the other end (right end) of the transverse part 57a. and a hanging portion 57c extending downward from the rear end of the retreating portion 57b. One end (left end) of the transverse portion 57a opens and communicates with the upper position of the front outer circumferential portion of the outer cylindrical portion 51 of the main body portion 45. The communication portion between one end of the transverse portion 57a and the outer cylindrical portion 51 is entirely welded to maintain liquid tightness therebetween.

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 it and the outer peripheral side. The space between the connecting pipe 55 and the material supply path 46 communicates with the space between the inner cylindrical part 50 and the outer cylindrical part 51 in the main body 45, and these spaces are used for cooling through which cooling water flows. Space 59 is defined as space 59. Therefore, the cooling section 47 is configured to include the cooling space 59, and an inner cylinder part 50 and an outer cylinder part 51 that form the cooling space 59. The cooling space 59 is formed in an area extending between the main body 45 and the connection point between the main body 45 in the material supply path 46, that is, the upper region of the material supply path 46.

The communication portion between the upper end of the connecting pipe 55 and the outer cylindrical portion 51 is entirely welded to maintain liquid tightness therebetween. Further, the lower end of the connecting pipe 55 is connected to the outer circumferential surface of the material supply path 46 by welding or the like so as to maintain a closed property.

One end (right end) of the supply pipe 56 is open and communicates with the lower end side outer peripheral part of the connecting pipe 55 . The communication portion between one end of the supply pipe 56 and the connecting pipe 55 is entirely welded to maintain liquid tightness therebetween.

In the cooling unit 47, cooling water is supplied from a supply pipe 56 via a pump (not shown) and introduced into a cooling space 59. Cooling water then flows from the supply pipe 56 to the discharge pipe 57 through the cooling space 59. Due to this flow of 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 path 46, thereby providing a cooling effect thereon.

Returning to FIGS. 2 and 3, the supply device 13 is supported on the rear surface of the rear opening forming portion 34 of the cover member 12 via a support portion 60. Here, the connecting 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 back 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 placed in line contact with the rear surface of the rear opening forming portion 34, and in this state, by supporting the supporting portion 60, the feeding device 13 can be positioned in the front-rear direction. Become.

The support portion 60 includes a plate-shaped holding member 61 extending left and right, and fastening members 62 provided on both sides of the holding member 61 in the extending direction. The fastening member 62 is formed of a bolt or the like, and is provided so as to be able to pass through the holding member 61 and be screwed into the rear opening forming portion 34 . The holding member 61 contacts the rear end of the connecting pipe 55 and the hanging portion 57c of the supply device 13, and by tightening the fastening member 62 while in contact with the connecting pipe 55 and the rear end of the hanging portion 57c, the holding member 61 closes the connecting pipe with the rear opening forming portion 34. 55 and the hanging portion 57c are sandwiched between them to support the supply device 13. On the other hand, from this state, by releasing the fastening member 62, 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. That is, the support portion 60 allows the supply device 13 to be supported on the cover member 12 in a detachable manner.

Next, the internal structure of the chamber 17 will be explained 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 attached to the 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 this opening from the front. A jet port 75 for jetting water plasma is formed in the jet port forming plate 74 .

Inside the chamber body 70, a circumferentially extending rib 70a is formed near the front, and a plasma water supply path 77 is formed in front of the rib 70a. Further, a plasma water discharge passage 78 is formed in the front wall portion 71 to discharge plasma water flowing into the opening thereof. 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. 8) are formed behind the rib 70a of the chamber body 70. Cooling water is supplied to the cooling water supply path 80 from the supply pump 26 , and cooling water is sucked from the cooling water discharge path 81 by 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 the shape of a round hole that forms the inner peripheral surface of the cylinder.

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

The water plasma generator 11 includes a generally cylindrical vortex water flow generator 90 housed within the chamber 17 . The vortex water flow generator 90 is arranged so that the inner space 72 and the center axis position C1 coincide with each other. Note that this 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 circumferential surface and the outer circumferential surface of the vortex water flow generator 90, and the plasma water flowing into the internal space 72 as described above forms a circular space. It flows in a swirling manner through the space.

A plurality of passages 91 are formed in the vortex water flow generator 90 so as to communicate between the inside and the outside. The passages 91 are formed at equal angles in the circumferential direction of the eddy water flow generator 90 (every 120 degrees in this embodiment). Furthermore, 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 oblique to the thickness direction of the vortex generator 90 . Specifically, each passage 91 extends in a tangential direction to the inner circumference of the vortex water flow generator 90 at the communication position. Further, the angle θ formed between 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 inside of 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 is formed that swirls in a circular shape so as to form a cavity at the central axis position C1 in a longitudinal section 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 cavity formed in the eddy water flow.

The water plasma generator 11 further includes various structures behind the vortex water flow generator 90 in the chamber 17 . With this configuration, positioning of the eddy water flow generator 90, cooling, holding and movement control of the cathode 16, power supply to the cathode 16, etc. are performed, but the explanation will be omitted here.

Next, a method for decomposing hazardous waste using the decomposition treatment apparatus 10 of this embodiment will be described with reference to FIG. 10. FIG. 10 is an explanatory diagram of the decomposition treatment of hazardous waste. Here, as shown in FIG. 10, the anode 18 is provided so that its upper end is located near the diagonally downward front of the injection port 75 on the outside of the chamber 17. Further, the supply device 13 is provided outside the chamber 17 at a distance from the front, 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 substantially aligned in the same straight line. .

As described above, when DC power is supplied to the cathode 16 and the anode 18 in a state where the eddy water flow with the cavity is formed, an arc discharge AR is generated between them. At this time, the arc discharge AR is generated so as to pass through the cavity of the vortex water flow. Due to the generation of this arc discharge AR, the plasma water forming the eddy water flow is dissociated and ionized, and a jet stream J of water plasma having high energy is injected from the injection port 75.

The water plasma jet stream J injected from the injection port 75 becomes an extremely high temperature and ultra-high velocity fluid, and is introduced into the main body portion 45 disposed in front of the injection port 75 of the chamber 17 . At this time, the injection direction of the water plasma jet stream J is along the front-rear direction, and the cylindrical main body 45 also extends along the front-rear direction, so that the jet stream J is well introduced into the main body 45. Further, in the supply device 13 , hazardous waste is supplied into the main body portion 45 through the material supply path 46 . Then, the hazardous waste supplied into the main body 45 is decomposed by the water plasma jet stream J introduced into the main body 45 .

Here, examples of the hazardous waste include PCBs, sulfuric acid pitch, asbestos, fluorocarbons, halons, tires, and various types of garbage, which are supplied via the supply device 13 in the form of granules, powder, or liquid. Even if such hazardous waste is input, it can be decomposed into harmless waste.

During the decomposition treatment of hazardous waste, the cover member 12 (see FIG. 2) will be heated, but it can be cooled and used by passing cooling water through its thickness. Further, the main body 45 and material supply path 46 of the supply device 13 are heated by receiving a large amount of energy because they are located in or close to the jet stream J of water plasma. 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 for cooling, damage caused by heating can be effectively suppressed.

According to the first embodiment, when the hazardous waste is decomposed 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. can. As a result, it is possible to prevent the hazardous waste supplied in the space surrounded by the main body part 45 from scattering, and also to supply the hazardous waste to a particularly high temperature part 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 also be improved.

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. can be easily done. Thereby, by preparing a plurality of supply devices 13 having different diameters and lengths of the main body portion 45 and different diameters of the material supply path 46, it becomes possible to cope with various conditions such as hazardous waste.

Furthermore, since the tapered surface 50a is formed on the inner circumferential surface of the main body 45 into which water plasma is introduced, the jet stream J of water plasma can be guided toward the central axis position of the main body 45. It is also possible to efficiently decompose hazardous waste.

In addition, since the opening shape of the material supply channel 46 to the main body 45 is made elongated in the water plasma injection direction, hazardous waste can be concentrated in the center of the water plasma, and the hazardous waste can be decomposed better at high temperatures. be able to process it. The shape of the opening is not limited to an elongated or elliptical shape in the front-rear direction, but may be circular, square, rectangular, or elongated in the left-right direction as long as the 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 side sectional perspective view of the supply device according to the second embodiment. FIG. 12 is a side sectional view of the supply device according to the second embodiment. As shown in FIGS. 11 and 12, in the second embodiment, a supply port forming body 100 is removably provided at the upper end of the material supply path 46, compared to the first embodiment. Note that in FIGS. 11 and 12, illustration of the supply pipe 56 is omitted.

The supply port forming body 100 is provided in the shape of a hexagon socket set screw. The supply port forming body 100 includes a shaft portion 101 in which a hexagonal hole 101a is formed in the upper part and whose center axis is directed in the vertical direction, and a male threaded portion 102 formed on the outer circumferential surface of the shaft portion 101 (the unevenness of the thread is not shown). ).

A tapered concave portion 103 that gradually expands downward is formed at the lower end of the shaft portion 101 . A flow path 104 through which hazardous waste (substances to be decomposed) flows is formed at a position where the central axes of the shaft portion 101 overlap between the upper end of the recessed portion 103 and the bottom of the hexagonal hole 101a. In the second embodiment, the flow path 104 is formed in the shape of a round hole.

A female threaded portion 106 (the unevenness of the thread is not shown) that is screwed into the male threaded portion 102 is formed on the inner circumferential surface of the upper end (end on the main body portion 45 side) of the material supply path 46 . The vertical length of the female threaded portion 106 is approximately the same as the vertical length of the male threaded portion 102 (shaft portion 101), and a stepped portion 107 on which the lower end of the shaft portion 101 is seated is provided on the lower end side of the female threaded portion 106. It is formed. Therefore, the supply port forming body 100 is provided so as not to protrude from the inner circumferential surface of the inner cylindrical portion 50 and the upper end of the material supply path 46 while the shaft portion 101 is screwed in until the lower end contacts the step portion 107 .

A ring-shaped elastic body 108 is provided in the groove formed in the stepped portion 107 . By press-contacting the lower end of the shaft portion 101 to the elastic body 108, good airtightness and liquid tightness are maintained between the supply port forming body 100 and the material supply path 46. It is possible to prevent the parts from becoming loose.

According to the second embodiment, by inserting a tool into the hexagonal hole 101a and rotating it, the supply port forming body 100 screwed into the material supply path 46 can be freely attached and detached, and the supply port Forming body 100 can be easily replaced. As a result, even if the channel 104 or the supply port formation body 100 becomes dirty over time during the decomposition process of hazardous waste, it can be handled by replacing the other supply port formation body 100, making maintenance easier. can be achieved.

Further, by preparing a plurality of supply port forming bodies 100 having different opening shapes and opening sizes of the flow passages 104, various flow passages 104 can be selected. Thereby, the amount and manner of supply of hazardous waste through the flow path 104 can be adjusted, and various hazardous wastes can be efficiently and reliably decomposed. Examples of the opening shape of the flow path 104 include an elongated oval or ellipse shape in the front-back direction and the left-right direction, a square shape, and a rectangular shape.

Note that the present invention is not limited to the above embodiments, and can be implemented with various modifications. In the embodiments described above, the size, shape, direction, etc. illustrated in the accompanying drawings are not limited to these, and can be changed as appropriate within the scope of achieving the effects of the present invention. Other changes can be made as appropriate without departing from the scope of the invention.

For example, in each of the above embodiments, the material to be decomposed is supplied by the supply device 13 from below the main body 45 through the material supply path 46, but the material supply path 46 is provided above the main body 45 and the decomposition target is supplied from above. A substance to be decomposed may also be supplied.

Further, the structure supporting the supply device 13 may be changed as long as the positional relationship with the chamber 17 can be determined as described above. However, supporting the cover member 12 via the support portion 60 is advantageous in that the structure can be simplified.

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

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

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

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

10 Decomposition treatment device 11 Water plasma generator 12 Cover member 13 Supply device 16 Cathode 17 Chamber 18 Anode 45 Main body 46 Material supply path 47 Cooling section 50a Tapered surface 59 Cooling space 60 Support section 75 Injection port AR Arc discharge

Claims (3)

a water plasma generator that injects water plasma by passing an arc discharge inside a vortex water flow;
A decomposition processing apparatus for decomposing the decomposition target by the water plasma, the decomposition processing apparatus comprising: a supply device for supplying the decomposition target to the jet stream of the water plasma;
The water plasma generator includes a chamber that forms the vortex water flow therein 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 at a position near the injection port outside the chamber,
The supply device includes a main body portion formed in a cylindrical shape extending in the injection direction of the water plasma into which the water plasma is introduced, a cooling portion that cools the main body portion, and a cooling portion connected to the main body portion; a material supply path for supplying the object to be decomposed into the interior of the main body, and provided outside the chamber away from the chamber;
The inner circumferential surface of the main body into which the water plasma is introduced is formed by a tapered surface that approaches the central axis of the main body as it moves away from the injection port ,
The main body portion is formed in a double cylindrical shape including an inner cylindrical portion forming an inner circumferential surface and an outer cylindrical portion forming an outer circumferential surface,
The cooling unit includes a connecting pipe that is provided to cover the material supply path while forming a space therebetween, and a cooling space through which cooling water flows,
The cooling space is formed to communicate with a region extending between the main body and a connection point between the main body and the material supply path, and a space between the connection pipe and the material supply path; A decomposition processing apparatus characterized in that a space between the inner cylinder part and the outer cylinder part is formed in communication with each other . A supply port forming body is removably provided at the end of the material supply path on the main body side, through which the decomposition target material supplied from the material supply path to the main body flows. The decomposition treatment apparatus according to claim 1 . 3. A male threaded portion is formed on the outer circumferential surface of the supply port forming body, and a female threaded portion is formed on the inner circumferential surface of the material supply path to be screwed into the male threaded portion. Decomposition processing equipment.

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