JP2000271245A - Method and apparatus for treating dioxin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dioxin pollutants from flying outside a structure by sucking the dioxin pollutants with a suction fan, even when surrounding dioxin pollutants fly when the irradiation of laser is performed. SOLUTION: A suction fan 14 is disposed at a suction port 2a of a structure 2 and a vacuum is caused in the structure 2 to suck dioxin pollutants 3, which prevents the dioxin pollutants 3 from flying outside without requiring large-scale working such as covering the whole of equipment. A laser part 5 is provided to irradiate the dioxin pollutants 3 with laser 4 so that the dioxin pollutants 3 are automatically heated over the entire area of the internal surface of the structure 2. This eliminates the need for disassembling the structure 2, for working by a worker in the bad environment and for spraying of water as pretreatment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for treating dioxin in a structure.

[0002]

2. Description of the Related Art In recent years, the generation of dioxin in waste incineration facilities has become a problem, and the parts that are most contaminated with this dioxin are the incinerator body and the chimney. When rebuilding these structures, it is necessary for an operator to wear a dust mask or the like in order to ensure safety during dismantling.

[0003]

When the structure is dismantled, dioxin may be scattered together with the dust and dirt. Therefore, a process of covering the entire structure is performed so that the dioxin is not scattered. . However, even if the worker wears a dust mask or the like as described above, the suction of dust or dust cannot be completely prevented. Further, even if the entire structure is covered, scattering to the outside cannot be completely prevented.

Therefore, in order to prevent dioxin from scattering at the time of dismantling, it is conceivable to spray water or abrasive mixed weight as a pretreatment. However, this is a secondary waste containing dioxin, and the treatment is difficult. There were challenges. Therefore, an object of the present invention is to provide a dioxin treatment method and a treatment apparatus that can solve the above-mentioned problems.

[0005]

The object of the present invention is to provide a laser unit for irradiating a laser for heating dioxin contaminants adhering to a structure to a predetermined temperature or more, and to construct the laser unit in a structure. A moving device for moving the object along the processing surface is provided, and at a predetermined position of the structure, in order to prevent the dioxin contaminant from being scattered by sucking around the dioxin contaminant irradiated with the laser. Suction fan is provided.

In the above structure, a suction force is generated by a suction portion provided at a predetermined position of the structure, and a negative pressure is applied around the dioxin contaminant to be irradiated with the laser to prevent the dioxin contaminant from being scattered. Meanwhile, the dioxin contaminants attached to the structure are made harmless by irradiating the dioxin contaminants with a laser and heating the dioxin contaminants to a predetermined temperature or higher.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, a dioxin processing apparatus 1 according to an embodiment of the present invention will be described. As shown in FIG. 1, this processing apparatus 1 heats dioxin attached to a structure (for example, a chimney of an incineration facility) 2.
A laser unit (laser irradiation head) 5 for irradiating a laser beam (laser) 4 for heating a dioxin contaminant 3 such as dust attached to a material constituting the inner peripheral surface of the structure 2 to a predetermined temperature or higher. Is provided.

[0008] The laser section 5 is provided with a laser beam 4.
Is transmitted through a fiber 8 penetrating a sealing plate member 7 to be described later to a laser oscillation device 6 disposed outside the structure 2, and the dioxin contaminant 3 is heated by the laser light 4 to a high temperature of 2000 ° C. or more. Heated. Further, a moving device 9 for moving the laser unit 5 along the processing surface of the structure 2 is provided.
A crane device 11 attached to the sealing plate member 7 for closing the opening 10 for raising and lowering the fiber 8, and disposed between the laser unit 5 and the tip of the fiber 8 so that the laser unit 5 rotates about the vertical axis 12. And a rotation driving device 13 for rotating the motor.

Further, a suction port 2a is formed below the structure 2, and a suction fan 14 for sucking the dioxin contaminant 3 into a predetermined place by applying a negative pressure around the dioxin contaminant 3 irradiated with the laser beam 4 is provided. A filter 16 for filtering dioxin contaminants 3 is provided downstream of the suction fan 14. Next, a dioxin processing method in the dioxin processing apparatus 1 having the above configuration will be described.

First, the opening 10 of the structure 2 is connected to the sealing plate member 7.
And the sealing plate member 7 via the crane device 11
The fiber 8 is inserted through the
The laser unit 5 is mounted via 3. On the other hand, structure 2
The suction port 2a is formed in the lower part of the suction port 2a, the suction fan 14 is disposed in the suction port 2a, and the filter 16 is disposed downstream of the suction fan 14.

Then, the laser oscillation device 6 disposed outside the structure 2 is driven, and the laser unit 5
The laser beam 4 is oscillated via the laser beam, and the laser beam 4 is irradiated in order from the dioxin contaminants 3 on the upper part of the structure 2 while driving the rotation driving device 13 to rotate the laser section 5 around the vertical axis 12. Further, when the dioxin contaminant 3 is irradiated with the laser beam 4,
Dioxin contaminants 3 such as molten ash adhering to the refractory of the structure 2 are melted at a high temperature of, for example, 2000 ° C., and the organic bonds of the dioxins are cut off to make them harmless. Can be decomposed). In addition, the molten portion is turned into slag, solidified, and reduced in volume.

When the heating of the dioxin contaminants 3 at the predetermined height position is completed, the crane device 1
1 is driven to lower the laser section 5, and the dioxin contaminants 3 are heat-treated by the laser beam 4 in the same manner as described above. Such an operation is performed on the entire inner peripheral surface of the structure 2. When the dioxin contaminant 3 is irradiated with the laser beam 4, the surrounding dioxin contaminant 3 irradiated with the laser beam 4 may be scattered by thermal convection.
This is because, by driving the suction fan 14 to make the inside of the structure 2 a negative pressure, the scattered dioxin contaminants 3 are sucked into the suction port 2a and are filtered by the filter 16, so that the dioxin has a structure. It is possible to prevent the object 2 from scattering outside.

As described above, according to the embodiment of the present invention, the laser unit 5 for oscillating the laser beam 4 for heat-treating and decomposing the dioxin contaminants 3 is made rotatable by the rotary driving device 13. At the same time, the crane device 11 is configured to be able to move up and down, and the laser unit 5 is rotated so as to irradiate the dioxin contaminant 3 on the inner peripheral surface of the structure 2 with the laser beam 4, and is further moved up and down to make the structure 2
Automatically heats the dioxin contaminants 3 over the entire inner peripheral surface of the vehicle, so that even large structures can be dealt with.
Unlike the conventional case, there is no need to dismantle the structure 2 when treating the dioxin contaminants 3, and there is no need for an operator to work in a bad environment or to spray water as a pretreatment. Therefore, there is no need for post-treatment of this treated water,
Dioxin can be safely and easily decomposed.

Further, a suction port 2a is formed in the lower part of the structure 2, and a suction fan 14 is disposed in the suction port 2a and is driven to drive the structure 2 to a negative pressure. When the dioxin contaminants 3 are treated by the suction, the dioxin contaminants 3 can be removed from the structure 2 without performing a large-scale operation such as covering the entire equipment so that dust and dust are not scattered outside. Can be prevented from scattering outside.

In the above embodiment, the structure 2 is described by taking the chimney as an example. However, the structure 2 is not limited to this.
As another example of the structure 2, it can be applied to the incinerator main body, which is the portion that is most contaminated with dioxin. Since the width of the incinerator main body is larger than that of the chimney, a moving device for moving the laser unit 5 in the horizontal direction is provided in the dioxin processing apparatus 1 of the above embodiment, and the moving device, the rotation driving device 13 and Crane device 11
By irradiating the dioxin contaminant 3 with the laser beam 4 from the laser unit 5 while driving the dioxin, the dioxin can be heat-treated.

Further, the laser beam in the above embodiment is exemplified by a laser which can be transmitted by a fiber, but is not limited to this.
_{(2) A} laser or a semiconductor laser may be directly installed in a structure. In this case, a power cable is used instead of the fiber 8 described above.

[0017]

As is apparent from the above description, the present invention provides a laser section for irradiating a laser for heating a dioxin contaminant adhering to a structure to a predetermined temperature or more along a processing surface of the structure. Even if the incinerator, that is, the structure becomes large, the dioxin contaminant is heated by irradiating the laser to the dioxin contaminant while driving the moving device, even if the structure becomes large. Dioxin in the structure can be automatically and safely heat-treated and decomposed, and the dioxin contaminant is discharged to the specified place by sucking the area around the dioxin contaminated by the laser at the specified position of the structure. Even if dioxin contaminants radiated by the laser are scattered by the configuration with a suction fan, Dioxin contamination can be prevented from scattering to.

Further, unlike the prior art, it is not necessary to spray water as a pretreatment when treating dioxin contaminants, so that there is no need for post-treatment of a large amount of secondary contaminants, and dioxin can be safely treated. It can be carried out. In addition, since dioxin is rendered harmless by laser irradiation, it can be treated as general waste upon disposal. Further, unmanned work becomes possible, and the worker does not have to engage in dangerous work.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing a use state of a dioxin processing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dioxin processing apparatus 2 Structure 3 Dioxin contaminant 4 Laser light 5 Laser part 6 Laser oscillation device 8 Fiber 9 Moving device 11 Crane device 13 Rotation drive device 14 Suction fan 16 Filter

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Morihiko Osawa 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Yoshihito Sakai 1-chome, Minami-Kohita, Suminoe-ku, Osaka-shi, Osaka No. 7-89 F-term in Hitachi Zosen Corporation (reference) 2E191 BA12 BD11 BD17 3B117 AA08 BA51 4G075 AA22 CA02 CA32 CA36 CA57 CA63 DA02

Claims (3)

[Claims] 1. A method for treating dioxin, comprising irradiating dioxin contaminants attached to a structure with a laser to heat the dioxin contaminants to a predetermined temperature or higher. 2. A suction unit provided at a predetermined position of a structure generates a suction force to reduce the pressure around a dioxin contaminant to be irradiated with a laser to prevent the dioxin contaminant from being scattered by the suction unit. The method for treating dioxin according to claim 1, wherein: 3. A laser section for irradiating a laser for heating a dioxin contaminant attached to a structure to a predetermined temperature or higher, and moving the laser section along a processing surface of the structure. A device is provided, and at a predetermined position of the structure, a suction fan for sucking around the dioxin contaminant irradiated with the laser to prevent the dioxin contaminant from being discharged to the outside is provided. Characteristic dioxin processing equipment.