JP3571441B2 - Waste treatment equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention heats industrial waste to generate a pyrolysis gas and a pyrolysis residue, and also combusts a combustible component separated from the pyrolysis residue and the pyrolysis gas in a combustion melting furnace. The present invention relates to a waste treatment apparatus, and more particularly to a waste treatment apparatus for improving efficiency in converting fly ash generated in a combustion melting furnace into slag.
[0002]
[Prior art]
As a conventional example of an apparatus for treating general waste such as municipal waste or combustible material such as waste plastic, for example, the former West German Patent Publication No. 375704.8, Former West German Patent Publication No. 3811820.3 and JP-A-64-49816. In these conventional examples, the waste is put into a pyrolysis reactor and heated under a low oxygen condition to be thermally decomposed to generate a pyrolysis gas and a pyrolysis residue mainly composed of a non-volatile component. The mixture is led to a separation device, where it is separated into a combustible component and a non-combustible component (for example, metal and ceramics). Then, the combustible component and the pyrolysis gas are introduced into the combustion melting furnace, and the combustion processing is performed in the combustion melting furnace.
[0003]
In such a waste disposal apparatus, fly ash is generated as a result of combustion in the combustion melting furnace. Therefore, as described in, for example, JP-A-64-49816, the fly ash is captured by a dust collector or the like on the downstream side of the combustion melting furnace, and the captured fly ash is recharged into the combustion melting furnace. It is known that slag is formed. Generally, fly ash contains heavy metals (Pb, Cd, Zn, Sn, As, Hg, etc.). Therefore, when slag is formed, there is also known a method of preheating fly ash at about 800 ° C. to remove the heavy metals. Have been.
[0004]
Further, in the waste treatment device, among the non-combustible components separated by the separation device, rubble such as pottery and stone has a high melting temperature, so that it is difficult to turn into slag even when put into a combustion melting furnace, Usually, they are discarded and disposed of in landfills.
[0005]
[Problems to be solved by the invention]
In the conventional waste treatment apparatus described in Japanese Patent Application Laid-Open No. 64-49816, there is no clear description about a means for transporting fly ash caught by a dust collector or the like to a combustion melting furnace. As a generally used method, such fly ash is transported to a combustion and melting furnace using the flow of air, and the fly ash riding on the flow of air is directly charged into the combustion and melting furnace. However, since fly ash has a very fine particle size, the injected fly ash simply floats in the combustion melting furnace and is not easily collected on the furnace inner wall. There is a problem that slag is not easily formed.
[0006]
In the case where fly ash is heated to remove the heavy metal, the fly ash is conventionally heated before being put into the combustion melting furnace, that is, outside the combustion melting furnace. For this reason, it is necessary to provide an external heating device separately, so that there is a problem that the whole system becomes large-sized and complicated, and the cost is unnecessarily increased.
[0007]
Furthermore, with conventional waste treatment equipment, debris such as pottery and stone must be transported to the landfill as it is, and if there is a large amount of debris, it is necessary to prepare many trucks for transporting the debris. And very annoying. Also, given that the location of final landfill sites is becoming increasingly severe every year, it is necessary to consider ways to recycle and reuse even rubble as much as possible.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a waste disposal apparatus capable of efficiently converting fly ash and rubble into slag that can be recycled and reused at low cost.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a pyrolysis reactor that heats and thermally decomposes waste to produce a pyrolysis gas and a pyrolysis residue mainly composed of non-volatile components; A discharge device that separates and decomposes the decomposition residue, a separation device that separates the pyrolysis residue discharged from the discharge device into a combustible component and a non-combustible component, and a pyrolysis gas from the discharge device and a separation device A waste treatment apparatus comprising: a combustion melting furnace that takes in the flammable component and burns the pyrolysis gas and the flammable component to form a slag; provided in the combustion melting furnace, the exhaust gas from the combustion melting furnace While taking in and temporarily storing the fly ash contained therein, a storage chamber for heating and melting the stored fly ash using the combustion heat in the combustion melting furnace, and the fly ash on the downstream side of the combustion melting furnace Conveyance that is caught and conveyed to the storage room And stage, is characterized in that the fly ash obtained by the melted and a pushing means for flowing down the combustion melting furnace wall extruded from the storage chamber.
[0010]
According to the above configuration, fly ash caught by, for example, a dust collector on the downstream side of the combustion melting furnace is transported to the combustion melting furnace by the transporting means. Air is often used as the transport means. That is, air is flown in the fly ash transport path connecting the dust collector and the combustion melting furnace, and the fly ash is transported with the air flow. In addition, fly ash may be sent by various conveyors such as a bucket conveyor, a belt conveyor, and a vibration conveyor, or by means such as container transportation. The type of these transporting means does not limit the present invention. Hereinafter, the case of the conveyor transport will be described.
[0011]
Fly ash conveyed to the combustion melting furnace flows into the storage chamber, where it is temporarily stored. The storage chamber is provided in the upper part of the combustion melting furnace, and the radiant heat from the combustion in the combustion melting furnace acts directly on it. The ash melts easily. The molten fly ash is pushed out of the storage chamber by the pushing means, and flows down on the inner wall surface of the combustion melting furnace.
[0012]
Further, by increasing the residence time of the molten fly ash as described above, the molten fly ash is exposed to a high-temperature atmosphere at a furnace temperature of about 1200 ° C. for a long time (preferably 30 minutes or more). It flows down in a thin film form like a "wet wall tower". For this reason, heavy metal compounds (Pb, Cd, Zn, Sn, As, Hg, etc.) contained in the molten fly ash are easily volatilized, and the molten fly ash is discharged from the slag outlet at the lower part of the combustion melting furnace. The molten slag when dropped into the water tank does not contain much of the above heavy metals.
[0013]
The longer the time during which the molten fly ash flows down the inner wall surface of the combustion melting furnace, that is, the longer the residence time of the molten fly ash on the inner wall surface of the combustion melting furnace, is more preferable in order to further volatilize the heavy metal compound. For this purpose, in the present invention, the position of the storage chamber is arranged at least 5 m above the slag discharge port at the lower part of the combustion melting furnace so that the residence time of fly ash on the inner wall surface of the combustion melting furnace becomes longer. In addition, if the ridges or grooves are formed in a spiral shape on the inner wall of the combustion melting furnace, the molten fly ash flows along the spiral ridges or grooves, so that the falling speed of the molten fly ash also decreases. Thus, the residence time can be further extended.
[0014]
Also, one or two doors are provided between the transfer means and the storage chamber, and fly ash conveyed by the transfer means is stored in the storage chamber only when the door facing the storage chamber is opened. It is to be brought in. In particular, when two doors are provided, fly ash is introduced into the storage chamber as follows. First, close the inner door facing the storage room, open the outer door, and temporarily store fly ash between both doors. Next, close the outer door, open the inner door, and put the temporarily stored fly ash into the storage room. As such an opening / closing door, any one of a gate (sliding door), a damper (swing door), and a rotary valve may be used.
[0015]
With this configuration, it is possible to prevent fly ash from rapidly flowing into the combustion and melting furnace due to the pressure difference between the inside of the combustion and melting furnace and the inside of the combustion and melting furnace that connects the dust collector and the combustion and melting furnace. Can be reliably stored in the storage room. In other words, the inside of the combustion smelting furnace is in a negative pressure state by an inductive blower usually provided downstream of the flue at the latter stage of the combustion smelting furnace, so fly ash transported through the fly ash conveyance path rapidly flows into the combustion smelting furnace. It is easy to re-ash, but if an opening and closing door is provided, the interaction with the fly ash already stored in the storage chamber prevents the transport means from completely communicating with the storage chamber, As a result, it is possible to prevent fly ash from suddenly flowing into the combustion melting furnace, and to reliably store fly ash in the storage chamber. In particular, when two doors are provided, the inflow from the outside can be more reliably prevented.
[0016]
Further, the storage chamber is provided so as to protrude outside the inner wall surface of the combustion melting furnace. With this configuration, the airflow generated by the combustion in the combustion melting furnace does not flow into the storage chamber, so that the fly ash stored in the storage chamber is not blown off by the airflow, and the fly ash is also stored at this point. It is possible to make sure that it is stored in the room.
[0017]
The pushing means includes a screw feeder or a pusher. The former is a means for transporting the object by the screw by rotating the screw in the outer cylinder, and the latter is a means for transporting the object by the piston moving back and forth in the outer cylinder. When these are provided in the storage chamber of the present invention, fly ash introduced from the opening / closing door is pushed into the storage chamber by these pushing means, and is melted by radiant heat from the combustion melting furnace already in the storage chamber. The fly ash that has been pushed in pushes out the fly ash that has been pushed in, so that the carry-in to the storage chamber and the introduction from the storage chamber to the combustion melting furnace are continued.
[0018]
In the case where these pushing means are used, the opening / closing door can be omitted or only one opening / closing door can be provided to sufficiently prevent the inflow of air flow. That is, in the case of a screw feeder, when the fly ash is carried in by the rotation of the screw, a condensed portion of the fly ash is generated at the tip (reservoir side), and this serves as a door for preventing the flow of airflow from the outside world. Fulfill. In the case of a pusher, the fly ash pressed by the pusher also forms a consolidation portion, and at the same time, the pusher itself can have a function of an opening / closing door. These operations will be described later with reference to embodiments.
[0019]
Further, another aspect of the present invention is the waste treatment apparatus having the above configuration, wherein a crushing means for crushing debris, a fly ash provided in a combustion melting furnace and contained in exhaust gas from the combustion melting furnace, and the crushing Means for storing and temporarily storing the debris crushed by the means, and heating and melting the stored fly ash and the crushed debris using the heat of combustion in the combustion melting furnace; and burning the fly ash. A conveying unit that is caught on the downstream side of the melting furnace and conveys to the storage room, a conveyance unit that conveys the crushed debris to the storage room, and the molten fly ash and the molten debris are transferred from the storage room. And an extruding means for extruding and causing the inner wall surface of the combustion melting furnace to flow down.
[0020]
Here, “rubble” refers to debris in non-combustible components obtained after the pyrolysis residue of the waste to be treated in the waste treatment apparatus of the present invention is separated by the separation apparatus, and separately from this. It refers to one or both of the rubbles carried into the waste treatment apparatus of the present invention from outside the system.
[0021]
By providing crushing means for crushing debris and taking in the rubble crushed by the crushing means into the storage chamber together with fly ash as in the above configuration, the rubble can be melted and turned into slag. This utilizes the effect that rubble, which usually has a high melting point and is hardly melted, is mixed with fly ash having a low melting point and eutectic at a lower temperature.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
(First Embodiment)
FIG. 1 shows a schematic configuration of a waste disposal apparatus according to the present invention. In the figure, reference numeral 1 denotes a waste supply device for supplying waste a containing combustibles such as municipal waste into the pyrolysis reactor 2. Normally, a horizontal rotary drum is used as the thermal decomposition reactor 2, and the inside thereof is kept in a low oxygen atmosphere by a sealing mechanism (not shown). Heating air heated by a heat exchanger (not shown) disposed downstream of the combustion melting furnace 3 is supplied to the pyrolysis reactor 2 from an air line L1. The inside of the reactor 2 is heated to 300 ° C. to 600 ° C., usually about 450 ° C. Then, the waste a supplied from the waste supply device 1 is thermally decomposed in the pyrolysis reactor 2 to generate a pyrolysis gas G1 and a mainly nonvolatile pyrolysis residue b. The pyrolysis gas G1 and the pyrolysis residue b generated in the pyrolysis reactor 2 are separated by the discharge device 4, and the pyrolysis gas G1 is supplied to the burner 5 of the combustion melting furnace 3 via the pyrolysis gas line L2. .
[0023]
On the other hand, the pyrolysis residue b is introduced into the cooling device 6, where it is cooled and then supplied to the separation device 7. The pyrolysis residue b is composed of non-combustible components such as metals and ceramics and flammable components. However, since the pyrolysis residue b introduced into the cooling device 6 is at a relatively high temperature of about 450 ° C., it is in contact with the atmosphere. There is a risk of ignition. To prevent this, the thermal decomposition residue b is cooled in the cooling device 6 to a temperature lower than the ignition point, for example, 80 ° C. or lower. The inside of the cooling device 6 is kept in a low oxygen atmosphere.
[0024]
The pyrolysis residue b cooled in the cooling device 6 is supplied to the separation device 7, where the non-combustible component c such as coarse metal and ceramics and the fine combustible component d containing ash in the atmosphere. And separated into Further, the combustible component d is supplied to the pulverizing device 8, where it is pulverized and then sent to the combustion melting furnace 3 via the line L3.
[0025]
The pyrolysis gas G1 supplied to the burner 5 of the combustion and melting furnace 3 via the pyrolysis gas line L2 is burned in the combustion and melting furnace 3 by the combustion air e sent by the blower 10. At the same time, the combustible component d sent via the line L3 also burns in the combustion melting furnace 3. The combustion smelting furnace 3 is generally called a combustion smelting furnace, in which the combustible component d is burned at a high temperature of about 1300 ° C., and the combustion ash derived from the ash contained in the combustible component d is mixed with the molten slag f. Then, it falls into the water tank 11 and solidifies. On the other hand, the exhaust gas G2 generated in the combustion and melting furnace 3 flows through the exhaust gas line L4, and is recovered by a heat exchanger (not shown) and a waste heat boiler 12 arranged on the downstream side of the combustion and melting furnace 3, and furthermore. After the dust is removed by the dust collector 13 and the flue gas is purified by the flue gas purifier 14, the air is discharged from the chimney 16 to the atmosphere by the blower 15. In addition, 17 in the figure is a generator operated by a steam turbine.
[0026]
In dust removal in the dust collector 13, fly ash g contained in the exhaust gas G2 can be captured. The captured fly ash g is transported into the combustion melting furnace 3 via the fly ash transport line L5. Further, fly ash collected by the flue 14 and each device provided in the area thereof, for example, the fly ash collected by the boiler 12, may be combined with the fly ash g and transported as necessary (this transport line is shown in the drawing). Absent). The present invention is characterized by a structure for carrying fly ash g from the fly ash transport line L5 into the combustion melting furnace 3. Hereinafter, the characteristic portions will be described in detail.
[0027]
FIG. 2 shows a schematic configuration of a vertical section of the combustion melting furnace 3 and the water tank 11. As shown in the figure, a storage chamber 20 for temporarily storing fly ash is provided at an upper portion in the combustion and melting furnace 3, and the storage chamber 20 projects outward from an inner wall surface of the combustion and melting furnace 3. Is located in the position. The distance H between the bottom of the storage chamber 20 and the slag discharge port 21 provided at the bottom of the furnace 3 is set to 5 m or more.
[0028]
A screw feeder 23 that is driven to rotate by a motor 22 is attached to the storage chamber 20. The screw feeder 23 has a carry-in port 24 at an upper portion, and the carry-in port 24 is connected to the fly ash transport line L5 via an opening / closing door 25. The opening / closing door 25 is reciprocated in the direction of arrow A by a driving device (not shown) to make the carry-in port 24 of the screw feeder 23 communicate with the fly ash transport line L5 or to cut off the communication. The screw feeder 23 is always cooled by the cooling water.
[0029]
Next, the operation of the combustion melting furnace having the configuration shown in FIG. 2 will be described.
From the fly ash transport line L5, fly ash is transported by a conveyor. The opening / closing door 25 repeats the opening / closing operation when the fly ash g is carried in. The fly ash flows into the carry-in port 24 of the screw feeder 23 only when the opening / closing door 25 is opened. The fly ash that has flowed into the carry-in port 24 is slowly carried to the storage room 20 side by the screw feeder 23 that is rotationally driven by the motor 22, and is pushed out to the storage room 20. At this time, the fly ash already exists in the storage chamber 20 and the fly ash is melted on the side near the burner 5 as described later, so that the fly ash pushed out into the storage chamber 20 easily moves. The screw ash is compressed at the distal end of the screw feeder 23 to form a fly ash compacted portion. Then, the fly ash consolidation portion moves to the left in the drawing as the screw feeder 23 rotates, and is heated and melted by radiant heat generated by combustion in the combustion melting furnace 2 in the fly ash melting portion shown in the drawing.
[0030]
The screw feeder 23 is rotating at a predetermined number of revolutions, and the molten fly ash is sequentially pushed out by the fly ash newly carried in toward the burner 5, and finally the inner wall surface of the combustion melting furnace 3 is arrowed. Flow down as B. The melted fly ash that has flowed down the inner wall surface and reached the bottom of the combustion melting furnace 3 falls from the slag discharge port 21 into the cooling water 26 in the water tank 11 and becomes granulated molten slag.
[0031]
According to the present embodiment, since the storage chamber 20 is disposed at a position protruding outside the inner wall surface of the combustion and melting furnace 3, the airflow due to combustion in the combustion and melting furnace 3 flows into the storage chamber 20. The fly ash stored in the storage chamber 20 can be prevented from being blown off by the air current.
[0032]
Further, since the distance H between the bottom surface of the storage chamber 20 and the slag discharge port 21 is set to 5 m or more, the residence time when the molten fly ash flows down the inner surface of the combustion melting furnace 3 can be increased, and the molten flying ash can be extended. The ash can be exposed to a high temperature for a long time, and the harmful heavy metal compounds (Pb, Cd, Zn, Sn, As, Hg, etc.) contained in the molten fly ash are volatilized in the combustion exhaust gas and generated. Can be easily removed from the slag. This is a favorable effect when the discharged slag is used for landfill or as a roadbed material or building material.
[0033]
In addition, since the heating of the fly ash is performed using the combustion heat in the combustion melting furnace 3, there is no need to provide a separate device for heating the fly ash, and the overall system becomes large and complicated. Can be avoided.
[0034]
Further, in the present embodiment, since the fly ash consolidation portion is always formed at the tip of the screw feeder 23, even if the opening and closing door 25 is opened to carry the fly ash g into the carry-in port 24, the combustion melting The inside of the furnace 3 does not directly communicate with the fly ash transport path L5, and the negative pressure in the combustion melting furnace 3 can be maintained at a predetermined value. Therefore, the consolidation portion further prevents air from leaking from the outside of the door 25, and has the same effect as the case where the door is doubly provided.
[0035]
(Second embodiment)
FIG. 3 shows a second embodiment of the present invention. A feature of this embodiment is that a pusher is provided instead of the screw feeder 23 in FIG. As shown in FIG. 2, a piston 30 of a pusher is attached to the storage chamber 20. The piston 30 is slid in the direction of arrow C by a driving device (not shown). Then, the piston 30 temporarily retreats to the position shown by the solid line in the figure, and then moves to the position shown by the dashed line in the figure, thereby pumping the fly ash g in the carry-in port 24 to the storage chamber 20 by a predetermined amount. I do. Also in the case of this pressure feeding, a fly ash consolidation part is formed at the tip of the piston 30. The point that the fly ash consolidation part is melted by the combustion heat in the combustion melting furnace 3 and flows down the inner wall surface of the combustion melting furnace 3 and is finally discharged as slag is the same as in the case of the above-described first embodiment. is there. The interlock between the piston 30 and the door 25 is performed in the following procedure. That is, when the piston 30 is at one of the alternate long and short dash lines, the opening / closing door 25 is opened, and fly ash g enters the carry-in entrance 24. Then, after closing the door 25, the piston 30 is moved to the position indicated by the solid line. Subsequently, the piston 30 is pushed out to the position indicated by the alternate long and short dash line, and the fly ash g is pushed into the storage chamber 20. As described above, the piston 39 itself plays the role of the second opening / closing door, and provides a sufficient effect of preventing air from leaking from the outside together with the fly ash compaction portion.
[0036]
(Third embodiment)
FIG. 4 shows a third embodiment of the present invention. A feature of the present embodiment is that a ridge 35 is spirally provided on the inner wall surface of the combustion melting furnace 3. When such a ridge 35 is provided, the molten fly ash flows along the ridge 35 as shown by the arrow D, so that the residence time when the molten fly ash flows down the inner wall surface of the combustion melting furnace 3 is lengthened. The heavy metal compounds in the molten fly ash can be sufficiently volatilized in the combustion exhaust gas and removed from the discharged slag.
[0037]
The function and effect are the same even if a groove is formed in a spiral shape on the inner wall surface of the combustion melting furnace 3 instead of the ridge. Further, the ridges and grooves may not be continuous spirally, but may be discontinuous with some cuts.
[0038]
(Fourth embodiment)
FIG. 5 shows a fourth embodiment of the present invention. In the present embodiment, among the non-combustible components c, debris such as pottery and stone are pulverized (preferably pulverized to 1 mm or less) by the pulverizer 40, and the pulverized debris is supplied to the fly ash transport line L5. The crushed debris is also charged into the combustion melting furnace 3 together with the fly ash g.
[0039]
According to this configuration, debris is melted together with fly ash into slag in the combustion melting furnace 3 and its volume becomes extremely small, so that various costs for transporting the debris can be reduced. In general, rubble has a high melting temperature of about 1400 ° C. and fly ash has a low temperature of about 800 ° C., so that fly ash is first melted in the combustion melting furnace 3, and rubble is common in the melted fly ash. Melts due to the melting effect. For this reason, at a lower melting temperature than melting rubble having a high melting point alone, it is possible to obtain a uniform slag without leaving any undissolved matter, and when the slag is used for landfill, the landfillability is extremely high. Stabilize. In the present embodiment, an apparatus and a method for melting and processing rubble of the non-combustible component c generated by pyrolysis and separation of waste processed by the waste processing apparatus of the present invention are described. However, in addition to the above, non-combustible substances (for example, so-called rubble and incinerated ash, etc.) carried in from the outside of the waste treatment apparatus of the present invention may be subjected to molten slag treatment in the same manner as in the present embodiment. it can.
[0040]
【The invention's effect】
As described above, according to the present invention, fly ash is temporarily stored in the storage chamber, melted in the storage chamber, and then caused to flow down the inner wall surface of the combustion melting furnace. Fly ash can be avoided and fly ash can be efficiently turned into slag.
[0041]
In addition, in the storage chamber, the fly ash is melted by utilizing the heat of combustion in the combustion melting furnace, and the inner wall of the combustion melting furnace is caused to flow down over a longer residence time. Heavy metals such as Pb, Cd, Zn, Sn, As, and Hg contained in fly ash can be sufficiently removed from the discharged slag. As a result, slag that does not contain the above heavy metals can be easily obtained, and the slag can be landfilled, and no harmful substances are eluted even when used for roadbed materials or building materials. Is very large.
[0042]
In addition, since rubble (or ash generated by other systems) can be melted together with fly ash and turned into slag, overhead costs for transporting rubble can be reduced, and the waste disposal equipment can be operated effectively. It is very convenient in doing.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a waste disposal apparatus of the present invention.
FIG. 2 is a sectional view of a combustion melting furnace and a water tank according to the first embodiment of the present invention.
FIG. 3 is a sectional view of a main part of a combustion melting furnace according to a second embodiment of the present invention.
FIG. 4 is a sectional view of a main part of a combustion melting furnace according to a third embodiment of the present invention.
FIG. 5 is a schematic configuration diagram of a waste disposal apparatus according to a fourth embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Waste supply device 2 Pyrolysis reactor 3 Combustion melting furnace 4 Discharge device 5 Burner 6 Cooling device 7 Separation device 8 Crushing device 10, 15 Blower 11 Water tank 12 Waste heat boiler 13 Dust collector 14 Flue gas purification device 16 Chimney 17 Power generation Machine 20 storage chamber 21 slag discharge port 22 motor 23 screw feeder 24 carry-in port 25 door 26 cooling water 30 piston 35 ridge 40 crusher L1 air line L2 pyrolysis gas line L3 flammable component line L4 exhaust gas line L5 fly ash Transport line a Waste b Thermal decomposition residue c Non-combustible component d Flammable component e Combustion air f Molten slag g Fly ash G1 Pyrolysis gas G2 Exhaust gas

Claims (7)

A pyrolysis reactor that heats and thermally decomposes waste to generate a pyrolysis gas and a pyrolysis residue mainly composed of a non-volatile component; and a discharge device that separates and discharges the pyrolysis gas and the pyrolysis residue. And, a separation device that separates the pyrolysis residue discharged from the discharge device into a combustible component and a non-combustible component, taking in the pyrolysis gas from the discharge device and the combustible component from the separation device, In a waste treatment device equipped with a combustion melting furnace that burns pyrolysis gas and combustible components to form slag,
Provided in the combustion melting furnace, while taking in and temporarily storing fly ash contained in the exhaust gas from the combustion melting furnace, heating and melting the stored fly ash using the combustion heat in the combustion melting furnace. A storage chamber to be transported, transport means for catching the fly ash on the downstream side of the combustion and melting furnace and transporting the fly ash to the storage chamber, and extrusion means for pushing out the molten fly ash from the storage chamber and flowing down the inner wall surface of the combustion and melting furnace. And a waste disposal device comprising: A pyrolysis reactor that heats and thermally decomposes waste to generate a pyrolysis gas and a pyrolysis residue mainly composed of a non-volatile component; and a discharge device that separates and discharges the pyrolysis gas and the pyrolysis residue. And, a separation device that separates the pyrolysis residue discharged from the discharge device into a combustible component and a non-combustible component, taking in the pyrolysis gas from the discharge device and the combustible component from the separation device, In a waste treatment device equipped with a combustion melting furnace that burns pyrolysis gas and combustible components to form slag,
Crushing means for crushing debris, and provided in the combustion and melting furnace, and temporarily store by capturing fly ash and rubble crushed by the crushing means contained in the exhaust gas from the combustion and melting furnace, respectively, A storage chamber for heating and melting the stored fly ash and crushed rubble using the heat of combustion in the combustion melting furnace, and a conveying means for capturing the fly ash on the downstream side of the combustion melting furnace and transporting the fly ash to the storage chamber Transport means for transporting the pulverized debris to the storage chamber, and extrusion means for extruding the molten fly ash and the molten debris from the storage chamber to flow down the inner wall surface of the combustion melting furnace. Waste treatment device. One or two doors are provided between the transfer means and the storage chamber, and fly ash conveyed by the transfer means is stored only when the door facing the storage chamber is opened. The waste treatment apparatus according to claim 1, wherein the waste treatment apparatus is carried into a room. The waste treatment apparatus according to any one of claims 1 to 3, wherein the storage chamber is provided so as to protrude outside an inner wall surface of the combustion melting furnace. The waste treatment apparatus according to any one of claims 1 to 4, wherein the storage chamber is arranged at a position 5 m or more above a slag discharge port provided in a lower part of the combustion melting furnace. 3. The waste disposal apparatus according to claim 1, wherein the pushing unit is a screw feeder or a pusher. 4. 7. The waste treatment apparatus according to claim 1, wherein a ridge or a groove is spirally formed on an inner wall surface of the combustion melting furnace.

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