JP2016011765A - Incineration device of pcb waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a facility cost and a running cost, and incinerate various forms of PCB wastes under preferable environment for detoxification.SOLUTION: An incineration device of a PCB waste includes a transportation base 2 mounting and transporting a PCB waste 10, and an incinerator 1 in which the transportation base 2 is transported to incinerate the mounted PCB waste 10 for detoxification. The transportation base 2 includes a mounting part 20 on which the PCB waste 10 is mounted, and in the mounting part 20, provided are plural uplifting parts 7 that uplift the PCB waste 10 from the its surface, and include a heating clearance 21 circulating combustion gas under the PCB waste 10. In the incineration device, the transportation base 2 in which the PCB waste 10 is mounted on the uplifting part 7 is transported into the incinerator 1, and the PCB waste 10 is incinerated for detoxification in the incinerator 1.

Description

  The present invention relates to an incinerator that incinerates and discards waste containing PCB.

  Since PCB has ideal characteristics as an insulating oil, a huge amount of PCB has been used as an insulating material for electric appliances such as electric wires and transformers. However, since PCBs have extremely high carcinogenicity, their use is prohibited, and the fact is that waste containing a huge amount of PCBs is left without being harmed. In order to dispose of such a PCB, an incineration device has been developed (see Patent Document 1).

JP 2008-275179 A

  The disposal apparatus of Patent Document 1 crushes an electrical device containing PCB, and then incinerates it with a rotary kiln. The rotary kiln transfers waste to the discharge side while incinerating the waste supplied to the inside of the rotary cylindrical furnace arranged at a downward slope. When the electric machine including PCB is crushed and incinerated by this incinerator, low melting point molten metal such as solder and aluminum contained in the waste adheres to the inner surface of the rotary cylindrical furnace. If the molten metal adheres to the inner surface of the rotating cylindrical furnace, there is a problem that the rotating cylindrical furnace is corroded by the molten metal and is seriously damaged. Furthermore, the rotary kiln has the disadvantages that it is very difficult to completely prevent harmful combustion gases from leaking outside, in addition to the extremely complicated overall structure and the extremely high equipment costs. This is because it is difficult to completely prevent gas leakage from the supply side and the discharge side because waste is continuously supplied to one end of the rotary cylindrical furnace and continuously discharged from the other end. Further, since the waste is incinerated while being transferred in a rotary cylindrical furnace, in order to incinerate PCB contained in the waste and make it completely harmless, it is necessary to lengthen the cylinder and raise the incineration temperature. For this reason, the whole apparatus becomes very complicated and large-scale, and there is also a drawback that the equipment cost becomes extremely high because the whole apparatus including the rotary kiln is configured as a closed structure to prevent gas leakage. Furthermore, since the rotary cylindrical furnace is disposed in a descending gradient and incinerated while being transported, it is difficult to completely detoxify and dispose of various forms of waste. This is because wastes of different types and forms have different incineration times and incineration temperatures for complete detoxification by incineration. For example, a large solid waste containing PCB inside needs to be made harmless by increasing the incineration time and incineration temperature as compared with a small waste.

  The present invention was developed for the purpose of eliminating these conventional drawbacks, and an important object of the present invention is to reduce PCB costs in various forms while reducing both equipment cost and running cost. It is to provide an incineration apparatus for PCB waste which can be innocuous by incinerating in an ideal state.

Means for Solving the Problems and Effects of the Invention

  The incinerator for PCB waste according to the present invention includes a transport table 2 on which PCB waste 10 is placed and transported, and an incinerator for carrying in the transport table 2 and incinerating the PCB waste 10 placed thereon to render it harmless. 1. The transport table 2 includes a mounting portion 20 on which the PCB waste 10 is placed. On the mounting portion 20, the PCB waste 10 is lifted from the surface, and combustion gas is placed under the PCB waste 10. A plurality of lifting portions 7 that provide the heating gap 21 to be circulated are provided. In the incinerator, the carrier 2 on which the PCB waste 10 is placed on the lifting unit 7 is carried into the incinerator 1, and the PCB waste 10 is incinerated in the incinerator 1 to make it harmless.

  The above incinerator can incinerate various PCB wastes uniformly and without causing any harm. This is because the PCB waste is lifted by the lifting portion, placed on the transfer table, carried into the incinerator and incinerated. This incinerator is a process for incineration of PCB waste, in which a combustion gas is circulated through a heating gap provided under the PCB waste, and the PCB waste is also heated from the bottom so that the entire PCB waste is recovered. Heat evenly. For this reason, this incinerator can incinerate uniformly the whole PCB contained in PCB waste, and can make it harmless.

  PCB is detoxified by heating at 850 ° C. for 2 seconds or more. However, in an incinerator, it is considerably difficult to heat all PCBs contained in PCB waste and make them harmless. This is because if the temperature of the PCB waste is uneven, it is rendered harmless in the portion heated to a high temperature, but cannot be rendered harmless in the portion having a low heating temperature. Since PCB waste contains PCB that has been used as insulating oil inside, such as electric wires, transformers, and insulators, it is difficult to heat PCB waste to a temperature that renders all of the PCB inside harmless. In particular, PCB waste that is placed on a carrier and carried into an incinerator is effectively heated by contacting the upper surface with the high-temperature combustion gas in the furnace, but the combustion gas can be effectively circulated thereunder. It is difficult and the heating temperature of the lower part becomes low, and it is difficult to completely detoxify all PCBs contained therein. However, the incinerator described above provides a heating gap under the PCB waste, and circulates the combustion gas in the heating gap to heat the PCB waste from below. Therefore, this incinerator can heat the PCB waste uniformly from the outside and uniformly heat all the PCBs contained therein, thereby making it harmless.

  In addition, the above incinerators place PCB waste on a transport stand and carry it into an incinerator to make the PCB harmless. Therefore, while reducing the overall cost of the equipment, incinerating the PCB in an ideal state is harmless. Can be This is because the overall structure can be greatly simplified as compared with a conventional incinerator using a rotary kiln.

In the incinerator for PCB waste of the present invention, the lifting portions 7 can be formed as a plurality of rows of ridges 7A formed in parallel with each other.
The incinerator described above can form a plurality of rows of heating gaps extending in parallel on the lower surface side of the PCB waste by providing a plurality of rows of ridges in parallel with each other. For this reason, this incinerator smoothly circulates the combustion gas along parallel heating gaps formed on the lower surface of the PCB waste, uniformly heats the PCB waste, and the PCB contained in the PCB waste. Can be ideally detoxified.

In the PCB waste incineration apparatus of the present invention, the lifting portion 7 is formed in a plurality of rows of ridges 7A, and the ridges 7A can be formed in a mountain shape whose width (W) decreases toward the upper end.
In the above incinerator, the ridge on which the PCB waste is placed has a mountain shape whose width is narrowed toward the upper end. Therefore, the contact area with the PCB waste is reduced, and the lower surface of the PCB waste is made wider. By exposing to the heating gap, the entire lower surface of the PCB waste can be uniformly heated.

In the PCB waste incineration apparatus of the present invention, the lifting portions 7 can be formed as a plurality of rows of support bars 7B arranged in parallel to each other.
The incinerator described above communicates the combustion gas to the entire lower surface side of the PCB waste by communicating the heating gap formed on the lower surface side of the PCB waste while supporting the PCB waste with a plurality of support bars. It can be circulated and incinerated efficiently.

In the PCB waste incineration apparatus of the present invention, the transport table 2 can include the peripheral wall 8 around the mounting portion 20. The peripheral wall 8 can be formed higher than the lifting portion 7 while connecting both ends of the lifting portion 7 to the inner surface thereof.
The incinerator described above can reliably prevent the PCB waste placed on the lifting part from falling from the lifting part during the transportation of the transportation table. This is because the transport base connects both ends of the lifting portion to the inner surface of the peripheral wall provided around the mounting portion, and forms the peripheral wall higher than the upper end of the lifting portion.

In the incinerator for PCB waste of the present invention, the peripheral wall 8 can have an opening 22 communicating with the heating gap 21.
Since the above incinerator is provided with an opening communicating with the heating gap on the peripheral wall of the transport table, in the process of incinerating the PCB waste, the combustion gas is passed through this opening to smoothly form the heating gap. It can be circulated to incinerate PCB waste efficiently.

In the PCB waste incineration apparatus of the present invention, the carrier 2 can lay the rice husk 9 at the bottom of the heating gap 21.
The incinerators described above can be innocuous by uniformly incinerating various PCB wastes while preventing damage to the transport table. This is because the PCB waste is placed on the carrier having the rice husks laid at the bottom of the heating gap, and is carried into the incinerator for incineration. This incinerator burns and disappears organic matter in rice husks in the process of incinerating PCB waste. Rice husk contains an inorganic silica component. For this reason, when organic substance is lost, silica of inorganic powder remains in powder form. At this time, the organic matter in the rice husks burned under the PCB waste heats the PCB waste from below with the heat energy to burn, and the organic combustion gas stirs the high-temperature combustion gas of the fuel supplied into the furnace Then, the entire PCB waste is uniformly heated. For this reason, the entire PCB containing PCB waste is incinerated uniformly and rendered harmless.

  Furthermore, the silica powder that is incinerated and remains on the carrier can effectively prevent damage caused by the low melting point molten metal contained in the PCB waste. PCB waste is a process in which PCB is detoxified by heating, and molten metal having a low melting point is melted and flows out. When the molten metal adheres to the transport table, a harmful effect that damages the molten metal occurs. However, since the above incinerators drop molten metal onto silica powder, which is an inorganic powder that remains after the rice husks are incinerated, a feature that prevents damage to the transport table due to molten metal flowing out from PCB waste is also realized. To do. Various types of PCB waste are disposed of by incineration. For example, electric wires including PCB, capacitors, insulators, and the like are all mixed with metal, and it is inevitable that molten metal having a low melting point melts and flows out when incinerated. This is because the molten metal having a low melting point cannot be separated from the waste in the pre-incineration step. The molten metal is lead (melting point: 323 ° C.), aluminum (melting point: 660 ° C.), solder (melting point: about 200 ° C.) and the like. It will corrode by combining with metals such as. In this incinerator, a rice husk is laid on a conveying table, and PCB waste is placed on the incinerator. For this reason, even if the molten metal flows out in the incineration process, the rice husk disappears and the remaining silica powder is laid on the conveying table. Silica powder isolates the molten metal from the carriage and prevents the carriage from being damaged by the molten metal. Molten metal accumulates on the silica powder, which can be easily removed from the carrier along with the silica powder.

The PCB waste incineration apparatus of the present invention is a plurality of rows of protrusions 7A or support bars 7B formed by arranging the lifting portions 7 in parallel with each other, and the PCB waste 10 is a long object 10A having a predetermined length. The elongate object 10A can be placed so as to intersect the ridges 7A or the support bars 7B, and a heating gap 21 can be provided under the PCB waste 10.
This incinerator sets a long object to a predetermined length and places it so as to cross a plurality of rows of ridges. It can be incinerated efficiently by forming a heating gap.

  In the incinerator for PCB waste of the present invention, the long object 10A can be either an electric wire containing PCB or an insulator containing PCB.

  In the PCB waste incineration apparatus of the present invention, the lifting portion 7 can be a plurality of ridges 7A or support bars 7B, and the PCB waste 10 can be a transformer containing PCB.

It is a schematic sectional drawing of the incineration apparatus of the PCB waste concerning one Example of this invention. It is a top view of the conveyance stand of the incinerator shown in FIG. It is the III-III sectional view taken on the line of the conveyance stand of the incinerator shown in FIG. It is a vertical longitudinal cross-sectional view which shows another example of a conveyance stand. It is a vertical longitudinal cross-sectional view which shows another example of a conveyance stand, Comprising: It is a figure corresponded in the VV sectional view of FIG. It is VI-VI sectional view taken on the line of the conveyance stand shown in FIG. It is a vertical longitudinal cross-sectional view which shows another example of a conveyance stand.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a PCB waste incinerator for embodying the technical idea of the present invention, and the present invention does not specify the incinerator as follows. Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  PCBs have been used extensively in electrical equipment such as electric wires, transformers, insulators, and capacitors because they exhibit extremely excellent physical properties as insulating oils. Since PCBs proved to be harmful, new use has been banned and large amounts of PCB waste have been left unharmed. Harmful waste PCBs can be rendered harmless by being pyrolyzed by incineration at a temperature of 850 ° C. or higher for 2 seconds or longer. In an incinerator for detoxifying PCB waste by heating and incineration, it is important to heat all PCBs contained in the waste to a high temperature. This is because if there are temperature spots in the heating of the PCB waste, the PCB heated to a high temperature is rendered harmless, but the PCB having a low heating temperature is not rendered harmless.

  The incinerator of the present invention incinerates PCB waste 10 containing harmful PCBs, such as transformers, electric wires, insulators, condensers, etc., and thermally decomposes PCBs to make them harmless and discard them. An incinerator according to an embodiment of the present invention is shown in FIGS. The incinerators shown in these drawings include a transport table 2 that carries and transports PCB waste 10, and an incinerator 1 that carries the transport table 2 and incinerates and detoxifies the PCB waste 10 that is placed. Prepare.

(Transfer table 2)
The transport table 2 includes a mounting portion 20 on which the PCB waste 10 is placed. 1 to 3 is a carriage provided with traveling wheels 3 that are carried into the incinerator 1 in a state where the PCB waste 10 is placed on the placing portion 20. The carriage 2 that is a carriage is provided with four wheels 3 at four corners of a rectangular base frame 4. The wheel 3 is made of metal that can withstand the incineration temperature. Further, the carrier 2 has a refractory brick 5 laid on the base frame 4. On the refractory brick 5, a metal bottom plate 6 such as iron is disposed. Further, the transport table 2 is provided with a plurality of lifting portions 7 on the bottom plate 6 for lifting and arranging the PCB waste 10 from the surface, thereby forming a mounting portion 20.

  The lifting portion 7 lifts and arranges the PCB waste 10 from the upper surface of the bottom plate 6, and forms a heating gap 21 for circulating the combustion gas under the PCB waste 10. The lifting part 7 shown in FIG. 1 is arranged so that the PCB waste 10 is lifted from the surface of the bottom plate 6 as a convex part that protrudes upward from the upper surface of the bottom plate 6. The lifting portion 7 shown in FIGS. 1 and 2 is a plurality of rows of protruding strips 7A arranged in parallel to each other. The plurality of rows of ridges 7A are spaced apart from each other at a predetermined interval. The plurality of rows of ridges 7 </ b> A are arranged at intervals that can stably support a long object 10 </ b> A such as an electric wire from below. Two or more rows, preferably three or more rows of projections 7 </ b> A are fixed to the upper surface of the bottom plate 6. The ridges 7A are fixed to the upper surface of the bottom plate 6 in a vertical posture by a method such as welding. Further, as shown in the enlarged cross-sectional view of FIG. 1, the ridge 7A has a mountain shape whose width (W) is narrowed toward the upper end, and the contact area with the PCB waste 10 placed thereon is reduced. .

  The transport table 2 is provided with a plurality of rows of protrusions 7 </ b> A as lifting parts 7 on the bottom plate 6, so that the PCB waste 10 placed on the placing part 20 is lifted from the upper surface of the bottom plate 6. A heating gap 21 is provided below. The transport table 2 can innocitate PCB without effectively remaining by burning heavy PCB waste 10 like a transformer or a large insulator. This is because heavy PCB waste 10 can be disposed and incinerated in a state where it is floated from the bottom plate 6 by a plurality of rows of ridges 7A. That is, a heating gap 21 is provided between the PCB waste 10 and the bottom plate 6, and incineration is performed in a state where high-temperature combustion gas is circulated through the heating gap 21, so that the PCB remains harmless.

  Further, the transport table 2 is provided with a peripheral wall 8 around the mounting portion 20 and along the outer periphery of the rectangular bottom plate 6. The carriage 2 is provided with a plurality of rows of protruding ridges 7 </ b> A at regular intervals on the inner side of the peripheral wall 8 to form a lifting portion 7. The peripheral wall 8 is provided in a posture intersecting with the pair of end surface walls 8A provided in a posture parallel to the plurality of rows of ridges 7A formed on the upper surface of the bottom plate 6 and the plurality of rows of ridges 7A. It consists of a pair of side walls 8B. The peripheral wall 8 shown in FIG. 2 has a pair of end face walls 8A and side walls 8B opposed to each other at their respective end portions to form a square shape as a whole. 2 has a pair of side walls 8B longer than a pair of end face walls 8A, and the entire outer shape of the transport table 2 has a rectangular shape extending in a direction intersecting with a plurality of rows of ridges 7A. . The carriage 2 can be loaded with a long object 10A such as an electric wire in a posture straddling the plurality of rows of ridges 7A and intersecting the plurality of rows of ridges 7A.

  As shown in FIG. 3, the transport table 2 connects both ends of each ridge 7 </ b> A to the inner surface of the peripheral wall 8, that is, the inner surface of the side wall 8 </ b> B. Both ends of the ridge 7A are fixed to the inner surface of the side wall 8B by a method such as welding. Furthermore, the peripheral wall 8 is formed higher than the ridge 7A. This prevents PCB wastes placed on the multiple rows of ridges 7 </ b> A, in particular, cylindrical or linear PCB wastes, from moving during transportation and falling from the loading part 20 of the transportation platform 2. Yes. In other words, by making the peripheral wall 8 higher than the tip edge of the ridge 7A, the protruding portion protruding above the ridge 7A is also used as a stopper, and the PCB waste placed on the mounting portion 20 falls. It is preventing. Moreover, this conveyance stand 2 divides the inner side of the surrounding wall 8 into several area | regions by connecting the both ends of 7 A of protrusions to the inner surface of the side wall 8B, and the multiple lines of protrusion 7A which bridges the opposing side wall 8B. A plurality of rows of heating gaps 21 are provided in parallel to each other below the PCB waste 10.

  Further, the transport table 2 shown in FIG. 4 has an opening 22 in the peripheral wall 8. The conveyance platform 2 shown in FIG. 4 has an opening 22 on the side wall 8 </ b> B that intersects the ridge 7 </ b> A that is the lifting portion 7. The openings 22 opened in the side wall 8B are opened at both ends of the heating gap 21 so that the combustion gas can be guided to the heating gap 21 from here. The conveyance table 2 shown in FIG. 4 is an upper end portion of the side wall 8B, and is located between the protruding strips 7A arranged in a plurality of rows, and is provided with an opening recess 22A having an upper opening. The transport table 2 can adjust the incineration state of the PCB waste by variously changing the opening position and shape of the opening recess 22A provided in the peripheral wall 8 and the opening area. However, the opening provided in the peripheral wall can be a through hole. As described above, the structure in which the opening 22 communicating with the heating gap 21 is provided in the peripheral wall 8 efficiently supplies the combustion gas to the heating gap 21 formed on the lower side of the PCB waste 10, The lower surface of 10 can be incinerated effectively.

  The above-described mounting portion 20 is configured by a plurality of rows of protruding ridges 7A in which the lifting portion 7 is provided on the upper surface of the bottom plate 6, but the mounting portion is not necessarily configured by a plurality of rows of protruding ridges. As shown in FIG. 6, a plurality of rows of support bars 7 </ b> B arranged away from the upper surface of the bottom plate 6 can be used. The mounting portion 20 shown in the figure has a plurality of support bars 7B made of an elongated steel material spaced apart at a predetermined interval and fixed to a facing side wall 8B in a bridging state. The support bar 7B of FIG. 5 is a plate-like metal bar extended in the horizontal direction, and this metal bar is fixed so that the width direction is in a vertical posture, thereby increasing the strength against the load in the vertical direction. This conveyance stand 2 also makes the height of the peripheral wall 8 higher than the height of the upper end of the support bar 7B. However, the support bar can be arranged as a metal rod having a cross-sectional shape of a triangular shape, with a width narrowing toward the upper end, or a metal rod having a cross-sectional shape of a circle or an ellipse. .

  The carriage 2 which is arranged with the lifting portion 7 as a support bar 7B away from the upper surface of the bottom plate 6 is fixed in a state where both ends of the support bar 7B are fixed to the side wall 8B by welding or the like and the pair of side walls 8B are bridged. 7B can be arranged. Further, the transport table 2 may be provided with a through hole for inserting the support bar 7B in the side wall 8B or a slit with an upper opening, and the support bar 7B is inserted into the through hole or slit to support the support bar 7B. it can. Further, in order to support the support bar 7B more firmly in a horizontal posture, the transport table 2 can also be provided with a support table 23 that supports the support bar 7B from below, as shown by a chain line in FIGS. . This transport table 2 can be used as a support table 23 by arranging a metal block between the support bar 7B and the upper surface of the bottom plate 6 at an intermediate portion or both end portions of the support bars 7B arranged in a plurality of rows. . In this structure, since the support bar 7B disposed away from the bottom plate 6 is supported from below by the support base 23, the strength against the load in the vertical direction is increased and the support bar 7B is stably held in a horizontal posture. it can. The above carrier 2 can also carry a long object 10A such as an electric wire across a plurality of rows of support bars 7B and in a posture intersecting with the rows of support bars 7B.

  As described above, the carrier 2 having the lifting portion 7 as the support bar 7B disposes the plurality of support bars 7B away from the upper surface of the bottom plate 6, and therefore, the gap 24 opened below the support bar 7B. Can be provided. Since the conveying table 2 can communicate with the adjacent heating gaps 21 via the lower gap 24 on the support bar 7B, the combustion gas can be efficiently transferred to the entire lower side of the PCB waste 10 placed on the loading unit 20. Can be supplied.

  Further, the transport table 2 shown in FIGS. 5 and 6 has an opening 22 in the peripheral wall 8. 5 and 6 has openings 22 on both the side wall 8B intersecting with the support bar 7B as the lifting portion 7 and the end wall 8A parallel to the support bar 7B. The openings 22 opened in the side wall 8B are opened at both ends of the heating gap 21 so that the combustion gas can be guided to the heating gap 21 from here. 5 and 6 is the upper end portion of the side wall 8B, and is located between the support bars 7B arranged in a plurality of rows, and the through holes 22B are opened to form the opening portions 22. The structure in which the opening 22 communicated with the heating gap 21 is provided in the peripheral wall 8 efficiently supplies the combustion gas to the heating gap 21 formed on the lower side of the PCB waste 10 so that the lower surface of the PCB waste 10 is effective. Can be incinerated. Further, in the transport table 2 shown in FIGS. 5 and 6, through holes 22C are opened at both side portions of the end face wall 8A to form openings 22. 5 and 6 is provided with a gap 24 below a plurality of rows of support bars 7B, and the adjacent heating gaps 21 communicate with each other through the gap 24. For this reason, the structure in which the opening 22 is provided in the end face wall 8A is efficient for the combustion gas supplied through the opening 22 opened in the end face wall 8A to the heating gap 21 communicated through the gap 24. By circulating, the entire lower surface of the PCB waste 10 can be incinerated efficiently. The transport table 2 can adjust the incineration state of PCB waste by variously changing the opening positions and shapes of the through holes 22B and 22C provided in the peripheral wall 8, the opening area, the number, and the like.

  Furthermore, although the mounting part comprised by the raising part which consists of a several row | line | column protrusion and a support bar is not shown in figure, it can also form in the concave shape above the center part of a protrusion and a support bar. The lifting portion composed of a vertical ridge or metal bar can be formed, for example, in the shape of a V-groove at the upper end of the central portion of the ridge or metal bar. Moreover, the lifting part which consists of metal rods can be bent or curved so that the upper part of the center part is concave. Even if it is easy to move or a lightweight PCB waste (for example, cylindrical waste or wire), the mounting part with the above shape of the ridges and support bars should be placed in the recess in the center. Can be held in place without being displaced.

  The incinerator of the present invention heats the PCB waste 10 carried into the incinerator 1 by the transfer table 2 to a high temperature in the incineration process in order to render all PCBs contained in the PCB waste 10 harmless. For this reason, in the incineration process, low melting point metals such as solder and aluminum contained in the PCB waste 10 may melt and flow out. The low melting point metal that flows out causes damage to the metal of the carrier 2 that carries the PCB waste 10 into the incinerator 1. In order to eliminate the harmful effects caused by the low melting point metal flowing out, the carrier 2 in FIG. 7 has a rice husk 9 laid on the top surface of the bottom plate 6 at the bottom of the heating gap 21.

  Rice husk 9 is composed mainly of silica and also contains organic matter. The organic matter in the rice husk 9 is burned away during the incineration process. The main component silica is an inorganic substance and is not lost even in the incineration process. Silica that does not disappear becomes powdery after incineration, that is, becomes silica powder and remains on the carrier 2. The organic matter burns to heat the PCB waste 10 from below, and further stirs the high-temperature combustion gas supplied to the incinerator 1. This is because the combustion gas of the rice husk 9 generated by burning organic matter flows upward from the bottom of the PCB waste 10 and forcibly raises the high-temperature combustion gas. The hot combustion gases that are agitated and convected around the PCB waste 10 heat the PCB waste 10 from the environment and effectively detoxify the PCB. In particular, the high temperature combustion gas is also convected to the lower part of the PCB waste 10 which is difficult to heat, and the PCB waste 10 is heated without any spots to be harmless.

  Furthermore, the rice husk 9 laid on the carrier 2, that is, at the bottom of the heating gap 21, uniformly heats the PCB waste 10 to render the PCB harmless, and further remains in the form of silica powder in the incineration step. Corrosion of the bottom plate 6 of the carrier 2 is prevented from the low melting point metal flowing out of the PCB waste 10. The rice husk 9 burns away and becomes silica powder. The silica powder remaining on the bottom plate 6 separates the low melting point metal flowing out of the PCB waste 10 from the bottom plate 6 and prevents it from coming into direct contact with the bottom plate 6 to lower the bottom plate 6. Protect from melting metal. Therefore, the amount of rice husks laid on the carrier 2 is set such that the remaining silica powder can protect the bottom plate 6 from the low melting point metal that flows down. The rice husk 9 is laid on the bottom plate 6 of the transport table 2 to a thickness of 2 mm or more and becomes silica powder to protect the bottom plate 6 from the low melting point metal. Therefore, the thickness for laying the chaff 9 on the bottom plate 6 of the carrier 2 is, for example, 2 mm or more, more preferably 3 mm or more, and even more preferably 5 mm. By increasing the laying amount of the chaff 9, the bottom plate 6 of the carrier 2 is more reliably protected. However, since the cost of the rice husk 9 increases as the rice husk 9 is laid thicker, the optimum value is set within the above-mentioned range in consideration of the running cost and damage to the bottom plate 6.

  Furthermore, as described above, in the structure having the peripheral wall 8 around the mounting portion 20, the height of the peripheral wall 8 can be set to a height at which the chaff laid on the upper surface of the bottom plate 6 does not fall out. In particular, as shown in FIGS. 4 to 6, in the structure in which the opening 22 is provided in the peripheral wall 8, the height of the lower end edge of the opening 22 is set to a height at which the chaff 9 does not fall out.

(PCB waste)
The above carrier 2 can place a long object 10 </ b> A having a predetermined length as the PCB waste 10. Examples of such a long object 10A include an electric wire containing PCB and an insulator containing PCB. The PCB waste 10 that is an electric wire is placed on the transport table 2 and incinerated as a long object 10A cut to a predetermined length. The PCB waste 10 such as an electric wire is cut to a length that can be placed on the carriage 2, for example, 1 m or more and 3 m or less, preferably 1 m or more and 2 m or less, and is placed on the carriage 2. . For this reason, even if it is a thick and long electric wire, since it cut | disconnects to predetermined length and it mounts on the mounting part 20, it can incinerate and detoxify efficiently, conveying easily. As described above, the long object 10A such as an electric wire cut to a predetermined length is placed in a posture that intersects the multiple rows of ridges 7A and the support bars 7B, and is held in a predetermined posture. .

  Further, the PCB waste to be placed on the placing portion of the transport table can be placed so that a long object having a predetermined length is an insulator containing PCB, and the insulator intersects with the ridges and the support bar. Moreover, the PCB waste placed on the placing portion of the transport table can be placed as a transformer on a placing portion constituted by a plurality of rows of ridges and support bars.

(Incinerator)
In the incinerator 1, the transport stand 2 on which the PCB waste 10 is loaded is loaded on the loading unit 20, the PCB waste 10 that is loaded is incinerated, and the PCB of the PCB waste 10 is thermally decomposed and rendered harmless. . The incinerator 1 heats the PCB waste 10 to a high temperature to incinerate the PCB to render it harmless. PCB is heated at 850 ° C. or higher for 2 seconds or more, and is thermally decomposed to be rendered harmless. In order to completely detoxify the PCB, the incinerator incinerates at a firing temperature at which the PCB contained in the PCB waste can be rendered harmless, for example, 900 ° C. or higher.

  The incinerator 1 includes a burner 11 that injects combustion gas into the inside thereof to incinerate the PCB waste 10 to make it harmless. The burner 11 is connected to the through-hole 14 of the outer wall 13 of the incinerator 1 and injects fuel such as heavy oil into the incinerator 1 in the form of a mist and burns it. The burner 11 supplies air together with fuel. The fuel injected in the form of a mist is mixed with air and burned as a flame inside. The flame heats the PCB waste 10 placed on the loading part 20 from the upper surface side, and further circulates the combustion gas in the heating gap 21 provided on the lower surface of the PCB waste 10 to bring the PCB waste 10 down. To heat the entire PCB waste 10 uniformly. The burner 11 is heated to, for example, 900 ° C. to 1000 ° C. to incinerate the PCB waste 10 to render the PCB harmless. The flame injected toward the PCB waste 10 carried into the incinerator 1 uniformly heats all the PCB wastes 10 placed on the mounting unit 20 and incinerates them to make them harmless.

  Furthermore, the incinerator 1 of FIG. 1 is provided with an opening / closing door 12 at the opening so that the carrier 2 can be carried in, closed, and incinerated. The incinerator 1 stops the operation of the burner 11 to open and close the door 12 when the transport table 2 is taken in and out, and closes the door 12 when the transport table 2 is loaded and the PCB waste 10 is incinerated. The burner 11 is operated.

  The above incinerator carries the carrier 2 on which the PCB waste 10 is placed on the loading unit 20 into the incinerator 1 and incinerates the PCB waste 10 in the incinerator 1, that is, heat-incinerates at a predetermined temperature. The PCB contained in the PCB waste 10 is rendered harmless.

The incinerator of FIG. 1 incinerates the PCB waste 10 in the following steps.
1. As shown in FIGS. 1 to 4, the PCB waste 10 is placed on a plurality of rows of ridges 7 </ b> A provided on the placing portion 20 of the transport table 2.
5 and 6, the PCB waste 10 is placed on a plurality of rows of support bars 7 </ b> B provided on the placing portion 20.
2. The carrier 2 having the PCB waste 10 placed on the placing part 20 is carried into the incinerator 1. In this state, the operation of the burner 11 is stopped and the door 12 is opened.
3. The open / close door 12 is closed, the burner 11 is ignited, and the burner 11 injects high-temperature combustion gas onto the carrier 2 of the incinerator 1 to incinerate the PCB waste 10.
The incinerator is a process for incinerating the PCB waste 10, and circulates the combustion gas in the heating gap 21 provided under the PCB waste 10 to heat the PCB waste 10 from the bottom, so that the PCB waste The whole 10 is heated uniformly. For this reason, this incinerator can incinerate uniformly the whole PCB contained in the PCB waste 10, and can be detoxified.
4). When the PCB of the PCB waste 10 is incinerated and made harmless, the operation of the burner 11 is stopped, the opening / closing door 12 is opened, and the conveyance platform 2 is carried out of the incinerator 1.
5. The detoxified PCB waste 10 discharged from the incinerator 1 while being placed on the transfer table 2 is taken out from the transfer table 2.

Further, the incinerator incinerates the PCB waste 10 in the following steps using the transport table 2 of FIG.
1. A rice husk 9 is laid on the bottom of the heating gap 21 of the carrier 2, that is, on the upper surface of the bottom plate 6. The thickness of the chaff 9 laid on the upper surface of the bottom plate 6 is 2 mm or more, preferably 5 mm or more.
2. The PCB waste 10 is placed on a plurality of rows of ridges 7 </ b> A provided on the placing portion 20 of the carrier 2.
3. The carrier 2 on which the PCB waste 10 is placed is carried into the incinerator 1. In this state, the operation of the burner 11 is stopped and the door 12 is opened.
4). The open / close door 12 is closed, the burner 11 is ignited, and the burner 11 injects high-temperature combustion gas onto the carrier 2 of the incinerator 1 to incinerate the PCB waste 10.
The incinerator is a process for incinerating the PCB waste 10, and circulates the combustion gas through the heating gap 21 provided under the PCB waste 10 to heat the PCB waste from below, so that the PCB waste Heat the whole uniformly. Further, in this process, the organic matter in the rice husk 9 burns and disappears. The organic matter in the rice husk 9 burning in this process heats the PCB waste 10 from the lower surface with the combustion gas, and stirs the high-temperature combustion gas to effectively incinerate the PCB contained in the PCB waste 10 and render it harmless. .
5. When the PCB of the PCB waste 10 is incinerated and made harmless, the operation of the burner 11 is stopped, the opening / closing door 12 is opened, and the conveyance platform 2 is carried out of the incinerator 1.
6). The detoxified PCB waste 10 discharged from the incinerator 1 while being placed on the transfer table 2 is taken out from the transfer table 2. In this state, the incinerated rice husk 9 remains on the carrier 2 as silica powder. The silica powder remains on the upper surface of the mounting portion 20 of the transport table 2, that is, on the bottom plate 6. This silica powder isolates the low melting point molten metal flowing out from the PCB waste 10 from the upper surface of the mounting portion 20 and prevents the carrier 2 from being damaged by the molten metal.

  The incinerator for PCB waste according to the present invention is effectively used for detoxifying PCB waste, which incinerates PCB waste containing harmful PCBs in a preferable environment to completely detoxify PCB.

DESCRIPTION OF SYMBOLS 1 ... Incinerator 2 ... Conveyance stand 3 ... Wheel 4 ... Base frame 5 ... Refractory brick 6 ... Bottom plate 7 ... Lifting part 7A ... Projection 7B ... Support bar 8 ... Peripheral wall 8A ... Side wall 8B ... End face wall 9 ... Rice husk 10 ... PCB waste 10A ... long object 11 ... burner 12 ... opening / closing door 13 ... outer wall 14 ... through hole 20 ... mounting portion 21 ... heating gap 22 ... opening portion 22A ... opening recess 22B ... through hole 22C ... through hole 23 ... support base 24 ... Gap

Claims (10)

A transport table (2) for loading and transporting PCB waste (10), and an incinerator (1) for incinerating and detoxifying the PCB waste (10) loaded and loaded on the transport table (2) A PCB waste incinerator comprising:
The carriage (2) includes a mounting part (20) for placing the PCB waste (10) thereon, and the PCB waste (10) is lifted from the surface of the mounting part (20). A plurality of lifting portions (7) provided with heating gaps (21) for circulating combustion gas under the PCB waste (10),
The transfer table (2) on which the PCB waste (10) is placed on the lifting portion (7) is carried into the incinerator (1), and the PCB waste (10) is moved into the incinerator (1). An incinerator for PCB waste that is made innocuous by incineration. A PCB waste incinerator according to claim 1,
A PCB waste incinerator comprising a plurality of rows of protrusions (7A) in which the lifting portions (7) are arranged in parallel to each other. A PCB waste incinerator according to claim 1 or 2,
A PCB waste incinerator in which the lifting portion (7) is a plurality of rows of ridges (7A), and the ridges (7A) are mountain-shaped with a width (W) narrowing toward the upper end. A PCB waste incinerator according to claim 1,
A PCB waste incinerator comprising a plurality of rows of support bars (7B) in which the lifting portions (7) are arranged in parallel to each other. A PCB waste incinerator according to any one of claims 2 to 4,
The transport table (2) includes a peripheral wall (8) around the mounting portion (20), and both ends of the lifting portion (7) are connected to the inner surface of the peripheral wall (8), and the peripheral wall (8) A PCB waste incinerator characterized by being formed higher than the upper end of the lifting portion (7). A PCB waste incinerator according to claim 5,
The PCB waste incinerator, wherein the peripheral wall (8) has an opening (22) communicating with the heating gap (21). A PCB waste incineration apparatus according to any one of claims 1 to 6,
An incinerator for PCB waste, wherein the transport table (2) is formed with rice husks (9) on the bottom of the heating gap (21). A PCB waste incinerator according to any one of claims 1 to 7,
A plurality of rows of ridges (7A) or support bars (7B) in which the lifting portions (7) are arranged in parallel to each other, and PCB waste (10) is a long object (10A) of a predetermined length, The long object (10A) is placed so as to intersect the ridge (7A) or the support bar (7B), and a heating gap (21) is provided under the PCB waste (10). Characteristic PCB waste incinerator. A PCB waste incinerator according to claim 8,
A PCB waste incinerator in which the long object (10A) is either an electric wire containing PCB or an insulator containing PCB. A PCB waste incinerator according to any one of claims 1 to 7,
A PCB waste incinerator in which the lifting portion (7) is a plurality of rows of ridges (7A) or support bars (7B), and the PCB waste (10) is a transformer containing PCB.

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