JP2012233665A - Container for heating, local heating device, and heating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently heat a heated object without using a device for shaping the heated object into a rod shape, in the case of using a device for locally heating the heated object.SOLUTION: This local heating device 1 of the embodiment heats waste 20 charged in a container 10 for heating. Accordingly, it is unnecessary to shape the waste 20 before being heated. Furthermore, the local heating device 1 does not heat the waste 20 by collecting light to the waste, but indirectly heats the waste 20 through a pipe 11 by collecting the light to a lower end 11B of the pipe 11 in a state of charging the waste 20 into the container 10 for heating. Thus, the heat is diffused to the circumference of the pipe 11, and the waste 20 and the pipe 11 can be efficiently heated and melted.

Description

  The present invention relates to a technique for heating an object to be heated by a local heating device.

  Hazardous wastes such as asbestos that cause health damage to the human body need to be transported and disposed of under strict control. Therefore, a technology has been developed that makes it possible to treat hazardous waste as general waste by detoxifying it. For example, Patent Document 1 describes a technique for melting waste including a material having a high melting point such as asbestos by condensing light such as infrared rays and locally heating the light. According to this technique, once asbestos is melted to make it non-fibrous and harmless, and it becomes a lump, its volume can be greatly reduced. In addition, since the apparatus locally heats the apparatus, the apparatus can be downsized as compared with an apparatus that performs chemical detoxification processing using a chemical solution or the like.

JP 2010-5541 A

  As described above, the technique disclosed in Patent Document 1 is a very effective technique for detoxifying hazardous waste such as asbestos, but in order to efficiently heat and melt asbestos-containing waste by condensing. It was necessary to mold the asbestos into a rod shape before heating. However, even in an apparatus for molding hazardous waste, since strict management is required such that the hazardous waste is not scattered, maintenance and management of the apparatus may be costly.

  The present invention has been made in view of the above circumstances, and when a device for locally heating an object to be heated is used, efficient heating of the object to be heated can be achieved without using a device that forms the rod. The purpose is to make it possible.

  In order to solve the above-mentioned problem, the present invention is a heating container for holding an object to be heated in a state of being suspended by a local heating device, wherein the heating region in the local heating device is vertically long. When the one end portion is positioned below in a state where the object to be heated is held in the internal space, the state in which the object to be heated is held in the internal space is maintained. A heating container comprising: a formed pipe part; and a connecting part provided at the other end of the pipe part and connected to the local heating device so as to be suspended from the local heating device. I will provide a.

  Moreover, in another preferable aspect, the connection portion has a member having a lower thermal conductivity and a higher melting point than the tube portion, and the member is suspended in the local heating device. It is provided so that it may be located on the heat transfer path | route from a pipe part to the said local heating apparatus.

  Moreover, in another preferable aspect, the said local heating apparatus is heated by condensing, and the said tube part is formed with the member which absorbs the said light, It is characterized by the above-mentioned.

  In another preferred embodiment, the pipe part has electrical conductivity.

  The present invention also provides the heating container described above, a suspension part for suspending the heating container and moving the heating container in the vertical direction, and a part of the suspended heating container. And a heating unit for locally heating the local heating device.

  Moreover, in another preferable aspect, the container further includes a recovery container that is provided below the heating container and configured using a material having a melting point higher than that of the tube portion.

  In another preferred embodiment, the pipe portion has an opening at the other end, and the suspension portion has an exhaust gas suction portion for sucking gas discharged from the opening at the other end. And

  The present invention also includes a loading step of loading an object to be heated in a heating container, a suspending step of suspending the heating container on a local heating device, and a lower end portion of the heating container by the local heating device. A heating method comprising: a heating step of heating and melting the object to be heated and the lower end portion together is provided.

  In another preferred embodiment, in the heating step, the molten object to be heated and the heating container are dropped and collected in a collection container.

  In another preferred embodiment, the object to be heated is compressed in the loading step.

  According to the present invention, when an apparatus for locally heating an object to be heated is used, it is possible to efficiently heat the object to be heated without using an apparatus that forms the rod.

It is a figure explaining the example of the local heating apparatus in embodiment of this invention. It is a figure explaining the example of the container for a heating in embodiment of this invention. It is a flowchart explaining the example of the heating method in embodiment of this invention. It is a figure explaining the example of the loading process in embodiment of this invention. It is a figure explaining the example of the heating process in embodiment of this invention. It is a figure explaining the example of the container for a heating in the modification 1 of this invention.

<Embodiment>
[Overview]
The local heating device in the embodiment of the present invention is a device that locally heats an object to be heated. In this example, the local heating device is a condensing heating device. As an object to be heated, waste containing asbestos (asbestos) or the like is used. This local heating device is made harmless by heating and melting waste that is harmful to the human body.

[Configuration of Local Heating Device 1]
Drawing 1 is a figure explaining the example of local heating device 1 in the embodiment of the present invention. FIG. 1 is a schematic diagram for explaining the positional relationship of each component. The local heating device 1 includes a light source 3 such as a reflecting mirror 2, a halogen lamp, and a xenon lamp, a hanging portion 4, a quartz tube 5, a recovery container 6, and a heating container 10. The local heating device 1 in this example has substantially the same configuration as a general condensing heating device that is generally used when crystal growth is performed by the floating zone (FZ) method, and below the hanging portion 4. The recovery container 6 is provided instead of the shaft that supports the seed crystal and the like, and the hanging portion 4 suspends the heating container 10 instead of the raw material rod. Therefore, about the structure similar to a general condensing type heating apparatus in the local heating apparatus 1, detailed description is abbreviate | omitted and the outline | summary of a structure is demonstrated.

  The reflecting mirror 2 has a spheroid shape, and condenses light emitted from the light source 3 installed at one focal point at the other focal point. The portion heated by the light collection is a member located in a specific area (hereinafter referred to as a heating area TA (see FIG. 5)) in the quartz tube 5. The heating container 10 is a container for holding waste as an object to be heated in the internal space, and is suspended by the suspending portion 4. Details of the heating container 10 will be described later.

The hanging portion 4 is a shaft-like member that hangs the heating container 10 by being connected to the heating container 10. In the FZ method, the hanging portion 4 corresponds to a portion where a raw material rod is hung, but in this example, the heating container 10 is hung. In addition, while the heating container 10 is suspended, the heating container 10 is configured to be movable in the vertical direction, and the heating container 10 is configured to be rotatable about the vertical direction as a rotation axis.
The quartz tube 5 is a tubular member configured to surround the heating container 10. By flowing a gas through the internal space of the quartz tube 5, the surroundings of the suspended heating container 10 can be controlled to a specific gas atmosphere.
The collection container 6 is a container installed below the suspended heating container 10, and a part of the heating container 10 that melts and falls in the heating area TA (pipe portion 11 (see FIG. 2)). And collect waste. The recovery container 6 is preferably configured using a material having a higher melting point than the tube 11 and the waste as the object to be heated so that the container 6 does not melt itself. However, since the melt is cooled during the fall, the melting point is not necessarily higher than that of the tube portion 11 and the waste.

[Configuration of Heating Container 10]
FIG. 2 is a diagram illustrating an example of the heating container 10 according to the embodiment of the present invention. 2A is a front view of the heating container 10, and FIG. 2B is a side view of the heating container 10 (as viewed from the arrow S in FIG. 2A), FIG. ) Is a bottom view of the heating container 10 (as viewed from the arrow B in FIG. 2A). The heating container 10 includes a tube portion 11 that forms an internal space in which waste is loaded, and also includes a tube portion 12 and a wire 13 that form a connecting portion for connecting the tube portion 11 and the hanging portion 4. . In addition, although the cylinder part 12 and the wire 13 are provided as a structure for making the pipe part 11 suspended by the hanging part 4, the pipe part 11 is suspended by the hanging part 4 If it is the structure which can be made, you may implement | achieve a connection part by another structure.

In this example, the tube portion 11 is formed of a metal such as iron having a melting point higher than that of the waste to be loaded. Further, the tube portion 11 has a tube shape having a tube length longer than the length in the vertical direction of the heating area TA, and is closed at the lower end portion 11B. In the state where the heating container 10 is suspended by the suspending portion 4, the lower end portion 11 </ b> B is positioned below, so that the loaded waste is kept in the internal space of the tube portion 11.
The upper end portion 11T of the tube portion 11 is opened, and waste can be loaded from the upper end portion 11T.

  The wire 13 is a metal wire such as a nickel wire or an enameled wire. The wire 13 passes through the inside of the cylindrical portion 12 and has an annular shape with both ends connected. When the pipe part 11 is suspended, the wire 13 and the suspended part 4 are connected. In addition, the wire 13 is not restricted to a metal, You may be comprised with another material.

  The tubular portion 12 is a tubular member provided through the tubular portion 11 in the vicinity of the upper end portion 11T of the tubular portion 11. In this example, the cylindrical portion 12 is made of alumina, but may be made of another material. At this time, it is desirable that the cylindrical portion 12 is made of a material having a lower thermal conductivity than the tube portion 11 and a high melting point. In this way, the cylindrical portion 12 made of a material having low thermal conductivity is used on the path through which heat is transferred from the tube portion 11 to the suspension portion 4. Can be configured to be difficult to be transmitted to the wire 13 and the hanging portion 4.

[Heating method]
FIG. 3 is a flowchart for explaining an example of the heating method in the embodiment of the present invention. As shown in FIG. 3, the heating method in the embodiment of the present invention includes a loading process (step S110), a suspending process (step S120), a heating process (step S130), and an extraction process (step S140).

FIG. 4 is a diagram illustrating an example of a loading process in the embodiment of the present invention. Is shown. FIG. 4 is a schematic diagram illustrating the positional relationship between the components. The loading step (step S110) is a step of loading the waste 20 into the heating container 10. In this example, as shown in FIG. 4A, the waste 20 is loaded into the internal space of the pipe portion 11. And the waste 20 is compressed using the press 30 as shown in FIG.4 (b). For example, the waste 20 is optimal if it is compressed so that the density is about double, but the amount of compression may be appropriately adjusted depending on the type of waste. Note that the waste 20 may not be compressed. In the example shown in FIG. 4, the cylinder part 12 and the wire 13 are loaded with the waste 20 in a state where the cylinder part 12 and the wire 13 are removed from the pipe part 11, but when the press machine 30 is not used, the cylinder part The waste 20 may be loaded with the 12 and the wire 13 attached.
In this way, the waste 20 does not need to be molded into a rod shape in advance by being loaded into the heating container 10.

  Returning to FIG. 3, the description will be continued. The suspending step (step S120) is a step of suspending the heating container 10 loaded with the waste 20 on the local heating device 1. As shown in FIG. 1, the heating container 10 is suspended by connecting the wire 13 and the suspension part 4. At this time, the heating container 10 is suspended so that the lower end portion (the lower end portion 11B of the tube portion 11) is positioned outside and above the heating area TA.

  FIG. 5 is a diagram illustrating an example of a heating process in the embodiment of the present invention. FIG. 5 is a schematic diagram illustrating the positional relationship between the components. In FIG. 5, the positional relationship of the waste 20 in the heating container 10 is shown. In the heating step (step S130), with the light source 3 turned on, the heating container 10 is moved downward (in the direction of arrow D) while rotating, and the lower end portion 11B of the tube portion 11 enters the heating area TA. , Heating and melting. Note that the heating container 10 may move downward without rotating. Further, a gas such as air may be allowed to flow in the internal space of the quartz tube 5 in order to suppress adhesion (e.g., antifouling) of the evaporated material such as the waste 20 to the quartz tube 5.

  As shown in FIG. 5A, in a state where the tube portion 11 does not enter the heating area TA, the tube portion 11 is not heated. And if the lower end part 11B of the pipe part 11 penetrate | invades into the heating area | region TA, the lower end part 11B will be heated. Thereby, in the vicinity of the lower end portion 11 </ b> B, heat is transmitted to the entire tube portion 11, and the waste 20 held inside is preheated via the tube portion 11. At this time, since the tube portion 11 is made of a member having high thermal conductivity such as metal, only the portion heated by the light collection becomes locally too hot due to the effect of transferring heat to the surroundings and diffusing. There is nothing. Therefore, only the tube portion 11 is locally melted so that there is no hole and the waste 20 does not fall without melting. Further, since the waste 20 is heated in a range wider than the heating area TA in the tube portion 11, the waste 20 can be efficiently heated and melted.

  When the waste 20 is melted and then the lower end portion 11B of the pipe portion 11 starts to melt, and both of them are melted together, as shown in FIG. 5B, the waste 20 and the pipe portion 11 are melted. The thing 21 falls and is collected as the mixture 25 in the collection container 6. In FIG. 5B, the lower end portion 11B of the tube portion 11 includes the waste portion 20 and the melt portion 21 of the tube portion 11 (or a melt 21 obtained by mixing them) due to the surface tension. However, when the amount of the melt 21 increases and becomes heavy, a part of the melt 21 falls.

  And even if the melt 21 falls and the pipe | tube length of the pipe part 11 becomes short, the suspending part 4 makes the container 10 for heating downward so that the lower end part 11B of the pipe part 11 may continue to be located in heating area TA. I will move to. At this time, the lower end portion 11B is moved so as not to be positioned below the heating area TA. The mode of the downward movement of the heating container 10 may be adjusted by an operator by operating an operation unit (not shown), or depending on conditions such as the shape of the tube unit 11, the material, and the type of waste 20. May be set in advance. Moreover, the imaging | photography part which image | photographs the heating area | region TA vicinity, and a captured image are analyzed, The movement aspect of the suspension part 4 is controlled so that the heating container 10 moves according to the molten state of the lower end part 11B of the pipe part 11. A control unit may be provided.

Returning to FIG. 3, the description will be continued. The extraction step (step S140) is a step of taking out the recovery container 6 containing the recovered mixture 25 and the remaining heating container 10 from the local heating device 1. The mixture 25 is a member in which the tube portion 11 and the waste 20 are melted and mixed. Therefore, since it is once melted, the harmful waste 20 is changed to a harmless state, and the volume is reduced because it is a lump.
The above is the description of the heating method.

  Thus, in the local heating device 1 in the embodiment of the present invention, the waste 20 loaded in the heating container 10 is heated. Therefore, the waste 20 does not need to be molded in advance before heating. In addition, the local heating device 1 does not concentrate and heat the waste 20 but concentrates it on the lower end portion 11B of the tube portion 11 in a state where the waste 20 is loaded in the heating container 10. The waste 20 is heated indirectly via the tube part 11. Thereby, the waste 20 and the pipe part 11 can also be efficiently heated and melted by the heat diffusing around in the pipe part 11. In addition, since the waste 20 is held in the internal space of the tube portion 11, the waste in the quartz tube 5 in the vicinity of the heating area TA due to steam generated as the waste 20 melts compared to the conventional case. It is also possible to suppress the formation of the deposit due to 20.

<Modification>
As mentioned above, although embodiment and the Example of this invention were described, this invention can be implemented in various aspects as follows.
[Modification 1]
In the above-described embodiment, the lower end portion 11B of the tube portion 11 has a configuration in which one end portion of the tube is closed by a disk-shaped member, but may be closed by another configuration. For example, the tube may be closed by deforming one end of the tube.

FIG. 6 is a diagram illustrating an example of the heating container 10a according to the first modification of the present invention. FIG. 6 is a diagram illustrating a side surface of the heating container 10a, which is a positional relationship corresponding to FIG. As shown in FIG. 6, the lower end portion 11Ba of the tube portion 11a in the heating container 10a has a configuration in which one end portion of the tube is closed by being crushed and deformed from both the left and right sides shown in FIG. Yes.
Thus, in lower end part 11Ba of pipe part 11a, it may be constituted so that the cross-sectional area of the internal space of pipe part 11a may become narrow, so that an end part is approached.

[Modification 2]
In the embodiment described above, the heated object has been described as an example of the waste 20 that is harmful to the human body such as asbestos. However, the heated object may be a waste that is harmless to the human body, or may be various materials other than the waste. There may be. Moreover, since the to-be-heated material is heated via the tube part 11, the material with a light transmittance may be sufficient.

[Modification 3]
In the embodiment described above, the pipe portion 11 has been described as being formed of iron, but may be a conductor such as a metal other than iron, a semiconductor, or an insulator. Also good. At this time, the tube portion 11 is desirably a material that absorbs light from the light source 3 of the local heating device 1 and desirably has a high thermal conductivity. In the case of an insulator, although few materials absorb light from the light source 3 and have high thermal conductivity, for example, colored sapphire is used.

Moreover, although the pipe part 11 was formed with the material whose melting | fusing point is higher than the to-be-heated material (waste 20) with which it loads, if the conditions shown below are satisfied, it may be formed with the material with a low melting | fusing point. . As a case where this condition is satisfied, even if the object to be heated has a higher melting point than the material constituting the tube portion 11, the difference between these melting points is small. In this case, since the object to be heated is also melted in a short time even if the tube part 11 is melted first, both of them fall in a melted state.
In addition, even when the object to be heated has a higher melting point than the material constituting the tube part 11 and the difference between the melting points is large, the tube part 11 and the object to be heated react and combine, and the melting point is lowered by the freezing point depression. May go down. For this reason, the state is substantially the same as when the difference in melting point is reduced, and the above-mentioned condition may be satisfied. For example, when the tube portion 11 is iron and the object to be heated is platinum, the melting point of platinum alone is about 1770 ° C., which is significantly different from the melting point of iron of about 1530 ° C. By doing so, the melting point is lowered to about 1600 ° C. (in the case of a composition ratio of 1: 1). Therefore, it falls in the state which the to-be-heated material which is platinum, and the lower end part 11B of the pipe part 11 which is iron are fuse | melted collectively. Thus, the combination of the material to be heated and the tube portion 11 can be various.

  On the other hand, when the tube part 11 is a member that does not absorb light from the light source 3, the tube part 11 is condensed on the waste 20 in the internal space of the tube part 11, and the waste 20 is directly heated. Even in such a case, when the heat is transferred from the waste 20 to the pipe part 11 and the pipe part 11 and the waste 20 are combined as described above and the melting point is lowered, the pipe part 11 is present. The waste 20 can be efficiently heated and melted as compared with the case where it is not.

  In the above-described embodiment, the pipe portion 11 is configured by a plate-like member. However, if the waste 20 can be held in the internal space, a hole may be formed in a part thereof. Further, it may be composed of a mesh-like member.

[Modification 4]
In the embodiment described above, the upper end portion 11T of the tube portion 11 is open, but may be closed after the waste 20 is loaded. When the upper end portion 11T is closed, a lid may be attached to the upper end portion 11T, or the upper end portion 11T may be closed by being deformed. By doing in this way, the vapor | steam generated when the waste 20 melt | dissolves can be prevented from escaping upward, and it can suppress reattaching to the hanging part 4 and the quartz tube 5. FIG.

[Modification 5]
In the above-described embodiment, the suspending portion 4 is a gas such as steam (gas generated from the heated waste 20 or the like) discharged from the upper end portion 11T of the tube portion 11 during heating of the lower end portion 11B of the tube portion 11. ), And an exhaust gas suction part for exhausting it to the outside of the apparatus (may be passed through a filter or the like) via an exhaust duct or the like may be provided. In this case, the exhaust gas suction part may be configured to suck gas from the upper end part 11T (hereinafter referred to as exhaust gas). Further, the exhaust gas suction portion may be connected to the upper end portion 11T to separate the internal space of the tube portion 11 and the internal space of the quartz tube 5. When the upper end portion 11T and the exhaust gas suction portion are directly connected, the configuration in which the upper end portion 11T and the hanging portion 4 are directly coupled may be configured such that the cylindrical portion 12 and the wire 13 are not used. In this case, the upper end portion 11T corresponds to the connecting portion.

In this way, it is possible to make it difficult for the exhaust gas to leak from the tube body 11 into the internal space of the quartz tube 5, so that there is an antifouling effect on the quartz tube 5. Further, even if the exhaust gas is toxic, it can be led to a detoxification device (such as a filter) for detoxification, so that it can be prevented from leaking outside in a harmful state. Thus, the pipe part 11 also serves as a chimney that guides the exhaust gas from the waste 20 located in the vicinity of the lower end part 11B to the upper end part 11T.
Such exhaust gas is generated at a temperature (for example, about 500 ° C.) lower than the temperature at which the waste 20 and the lower end portion 11B of the pipe portion 11 are melted. When the temperature at which the portion 11B melts is reached, the exhaust gas is almost exhausted. Therefore, the exhaust gas hardly comes out from the opened lower end portion 11B as a result of melting.

[Modification 6]
In the embodiment described above, the local heating device 1 heats the member located in the heating area TA by condensing, but it may be heated using a laser. Further, the heating may not be performed using light, and various methods such as an induction heating method, a resistance heating method, and a method using thermal power may be used as long as the lower end portion 11B of the tube portion 11 can be locally heated. A heating method can be applied.

DESCRIPTION OF SYMBOLS 1 ... Local heating apparatus, 2 ... Reflecting mirror, 3 ... Light source, 4 ... Hanging part, 5 ... Quartz tube, 6 ... Recovery container, 10 and 10a ... Heating container, 11 and 11a ... Tube part, 12 ... Tube Part, 13 ... wire, 20 ... waste, 21 ... melt, 25 ... mixture, 30 ... pressing machine

Claims (10)

In a state suspended by a local heating device, a heating container for holding an object to be heated,
When the tube length is longer than the vertical length of the heating region in the local heating device, and when one end portion is positioned downward in a state where the object to be heated is held in the internal space, the internal space A tube part formed so as to keep the object to be heated held;
A heating container, comprising: a connecting portion that is provided at the other end of the tube portion and is connected to the local heating device so as to be suspended from the local heating device. The connecting part has a member having a lower thermal conductivity and a higher melting point than the pipe part,
The said member is provided so that it may be located on the heat transfer path | route from the said pipe part to the said local heating apparatus in the state suspended by the said local heating apparatus. Container for heating. The local heating device heats by condensing,
The container for heating according to claim 1 or 2, wherein the tube portion is formed of a member that absorbs the light. The said pipe | tube part has electrical conductivity. The heating container in any one of Claim 1 thru | or 3 characterized by the above-mentioned. A heating container according to any one of claims 1 to 4,
A suspension part for suspending the heating container and moving the heating container in the vertical direction;
A local heating device, comprising: a heating unit that locally heats a part of the suspended heating container. The local heating apparatus according to claim 5, further comprising a recovery container that is provided below the heating container and configured using a material having a melting point higher than that of the pipe portion. The other end of the tube portion is open,
The local heating device according to claim 5 or 6, wherein the suspension portion includes an exhaust gas suction portion that sucks a gas discharged from the opening of the other end portion. A loading step of loading an object to be heated in a heating container;
A suspending step of suspending the heating container in a local heating device;
A heating method comprising: heating a lower end portion of the heating container by the local heating device, and melting the object to be heated and the lower end portion together. The heating method according to claim 8, wherein, in the heating step, the melted object to be heated and the heating container are dropped and collected in a collection container. The heating method according to claim 8 or 9, wherein, in the loading step, the object to be heated is compressed.

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