JP3788012B2 - Waste disposal method and waste disposal facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste treatment method and a waste treatment facility for safely treating a waste at a high temperature while avoiding scattering to the surroundings. Further, the present invention is housed in a sealed container like medical waste. The present invention relates to a waste processing method and a waste processing facility for safely processing high-temperature waste that is discarded, transported, and processed in a state while avoiding scattering of the contents around.
[0002]
[Prior art]
Currently, there is a shortage of waste disposal sites, and much of industrial waste or general waste is landfilled as it is or after being incinerated and reduced in volume after some pretreatment. In many cases, final disposal is performed.
There are various methods for incineration as described above. In recent years, management of harmful substances such as dioxins in the gas generated in incineration has become a problem, and it is possible to decompose harmful substances in a high-temperature oxidizing atmosphere. Incineration methods are required.
[0003]
Waste incineration methods capable of such high temperature treatment include waste treatment processes disclosed in JP-A-6-26626, JP-A-6-79252, and JP-A-7-323270.
FIG. 5 is a side view showing the above-described conventional waste treatment facility.
In FIG. 5, 1 is a compressor that pressurizes and compresses waste in batch (: batch), 2 is a cylinder for compression, 3 is a compression support board, 4 is compressed waste (hereinafter referred to as a compression molded product). 2) is a drying area for compression moldings, 4b is a thermal decomposition area for compression moldings, and 4c is for compression moldings. Carbonized region, 4 _E Is the inlet of the tunnel furnace 4, 5 is a high temperature reactor, 10a and 10i are compression moldings, 11 _i, 11 _n Is a carbonized compression molded product (hereinafter also referred to as carbonized product), 12 is a mixture of carbonized product and combustion residue, 13 is an oxygen-containing gas inlet, 15 is a melt, 15H is a melt outlet, and 20 is a waste product. 21 is a lid for the waste input port, 40 is an extrusion port of the carbonized product obtained in the tunnel-type heating furnace 4 into the high-temperature reactor 5 (: the carbonized product into the high-temperature reactor 5) 50) is the exhaust gas outlet of the high temperature reactor 5, 50a is the gas outlet of the high temperature reactor 5, f ₁ Is the moving direction of the compression moldings 10a and 10i, f ₂ Is the carbonized product 11 _i , 11 _n Direction of movement, f _Three Is the flow direction of the pyrolysis gas generated in the tunnel-type furnace 4, f _Four Is the direction in which the oxygen-containing gas is blown into the high-temperature reactor 5, f ₆ Is the moving direction of the compression cylinder 2, f ₇ Is the moving direction of the compression support plate 3, f ₈ Is the rotation direction of the lid 21 of the waste inlet 20, L _L Is the height of the lower end of the extrusion port 40 into the high temperature reactor 5 of the carbonized product, L _H Indicates the height of the gas outlet 50a of the high temperature reactor 5.
[0004]
In the waste treatment facility shown in FIG. 5, first, the waste supplied batchwise from the waste inlet 20 is compressed using the compressor 1 to form a close compression molded product 10a.
Next, the compression molded product 10a is pushed into an elongated tunnel heating furnace (: horizontal tunnel heating furnace) 4 heated from the outside.
At this time, the moisture contained in the waste is squeezed out in the compression step described above and pushed into the tunnel heating furnace 4 together with the waste.
[0005]
The cross-sectional shape of the compression molded product 10a is as follows. _E When the compression molding 10a is pushed in, the compression molding 10a is pushed in while maintaining contact with the inner wall of the tunnel heating furnace 4.
The compression molding 10i moves while sliding in the tunnel-type heating furnace 4 each time a new compression molding is sequentially pushed.
[0006]
The tunnel-type heating furnace 4 is heated from the outside as described above, and the inside is heated to about 600 ° C., and the compression-molded product 10i is dried, pyrolyzed, carbonized in the process of moving and raising the temperature of the compression-molded product 10i. To do.
The carbonized product 11n and gas components generated by thermal decomposition are charged and blown into the high temperature reactor 5 maintained at 1000 ° C. or higher.
[0007]
Thereafter, the combustible component in the carbonized product including the mineral component and the metal component is combusted and gasified by the oxygen-containing gas.
In this case, by adjusting the amount of oxygen in the oxygen-containing gas, the generated gas can be recovered as a fuel gas containing carbon monoxide and hydrogen.
Further, the residue portion that is not gasified by combustion is melted in the high temperature reactor 5 to become a melt 15 and is recovered from the melt outlet 15H at the lower portion of the high temperature reactor 5.
[0008]
The waste treatment method described above is considered to be a highly versatile method because industrial waste and general waste generated in various forms are processed by batch compression molding with a compressor.
On the other hand, in the case of waste that cannot be dispersed, such as infectious medical waste generated in hospitals or laboratories, it is packed in a synthetic resin sealed container, etc., and transported and incinerated as it is. Has been done.
[0009]
Waste stored in such a synthetic resin sealed container (hereinafter referred to as a synthetic resin container sealed waste or a container sealed waste) and other wastes using the above-described waste disposal method In the same way, when the container-closed waste is compressed directly under the waste inlet 20, the sealed container is destroyed, and harmful substances such as infectious medical waste are scattered. Occurs.
[0010]
For this reason, in the above-described waste treatment method, treatment of harmful substances such as medical waste has not been performed.
[0011]
[Problems to be solved by the invention]
The present invention solves the above-mentioned problems of the prior art and provides a waste processing method and a waste processing apparatus capable of processing waste safely and reliably without fear of scattering to the surroundings. For the purpose.
Furthermore, the present invention is capable of safely and reliably processing container-sealed waste such as infectious medical waste stored in a sealed container such as a synthetic resin sealed container without fear of scattering the contents. An object is to provide a possible waste treatment method and a waste treatment apparatus.
[0012]
[Means for Solving the Problems]
In the above-described waste treatment process, the compression molding is pushed into the tunnel-type heating furnace while the compression molding is pushed into contact with the inner wall of the tunnel-type heating furnace, thereby generating steam and gas generated in the process. It serves as a seal to prevent backflow to the tunnel heating furnace entrance.
[0013]
On the other hand, since the volume of the compression-molded product is reduced while being carbonized in the tunnel heating furnace, a space (: gap) S is formed in the upper part of the tunnel heating furnace in the carbonization region.
The present inventors paid attention to the space in the tunnel heating furnace formed in the carbonization region when the waste is dried, pyrolyzed and carbonized using the tunnel heating furnace.
[0014]
That is, for example, in the case of a horizontal tunnel heating furnace, the present inventors have described the infectivity described above in the space formed in the carbonization region in the tunnel heating furnace, which is a gap formed in the upper part of the carbonization region of the heating furnace. The present inventors have found that it is possible to treat infectious medical waste that cannot be scattered in the environment by introducing a sealed container containing medical waste, and have arrived at the present invention.
[0015]
That is, the first invention is a waste product. (Excluding container-closed waste) and container-closed waste in a high-temperature reactor in a vertical furnace that maintains a positive pressure in the furnace, except) The Using a horizontal tunnel-type heating furnace provided on the side wall of the vertical furnace The process of pressurizing and compressing batchwise and the obtained compression molding product, Said Inside the tunnel furnace Pushing in contact with the inner wall of the furnace Charge, dry, pyrolyze, and carbonize, and charge the obtained carbonized product into a high-temperature reactor, burn it, and melt incombustibles Who Law With processing in The waste (Excluding sealed container waste) Separately from Container closed type Carbonize waste in the tunnel-type furnace The space created above Direct charging To be treated with the waste (excluding sealed container waste) A waste treatment method characterized by:
[0019]
First 2 The invention of waste (Excluding sealed container waste) , A horizontal tunnel heating furnace 4 for drying, pyrolyzing, and carbonizing a compression molded product obtained by the compressor 1, and the horizontal tunnel heating furnace 4 In the waste treatment facility having the high-temperature reactor 5 for burning the carbonized product obtained in step 1 and melting the incombustible component, the waste to the compressor 1 is disposed on the upper side wall of the horizontal tunnel furnace 4. Separately from the inlet 20, the container-sealed waste is put into the horizontal tunnel-type heating furnace 4. The space created above the carbonization region In Directly A charging device 30 for charging; the charging device 30 includes a supply hopper 33 for the container-closed waste; an upper seal valve 31 provided at a lower portion of the supply hopper 33; A storage chamber 34 connected to the lower portion of the seal valve 31, a lower seal valve 32 provided at the lower portion of the storage chamber 34, and a container-sealed waste connected to the lower portion of the lower seal valve 32 to the horizontal tunnel Inside the heating furnace 4 The space created above the carbonization region In Directly A container-closed waste charging inlet O for charging, and an inlet 4 of the horizontal tunnel-type heating furnace 4 _E To the center Oc of the opening of the container-sealed waste charging inlet O ₁ Is a waste treatment facility characterized by satisfying the following formula (1).
[0020]
l> l ₁ ≧ (1/2) × l ……… (1)
Where l ₁ Is the entrance 4 of the horizontal tunnel furnace 4 _E To the center Oc of the opening of the container-sealed waste charging inlet O, l is the inlet 4 of the horizontal tunnel heating furnace 4 _E To the extrusion port 40 of the carbonized product obtained in the horizontal tunnel heating furnace 4 into the high-temperature reactor 5.
[0021]
The first departure described above. Tomorrow The compression-molded product obtained in the pressurizing and compressing steps described above is sequentially placed in a tunnel-type heating furnace, dried, pyrolyzed and carbonized, and the resulting carbonized product is sequentially reacted at a high temperature. The present invention is more preferably applied to a waste treatment method including a step of charging in a vessel, burning, and melting incombustible components. Also, the first mentioned 2 Invention of the compressor 1 and a tunnel type heating furnace (side Type tunnel heating furnace) 4 and high-temperature reactor 5 are connected in this order, and the compression molded product and carbonized product are continuously supplied to the compressor 1 and the tunnel heating furnace. (side It is more preferably applied to a waste treatment facility that moves in the type tunnel heating furnace) 4 and is supplied into the high-temperature reactor 5.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail.
FIG. 1 is a side view showing an example of the waste treatment facility of the present invention.
FIG. 2 is an enlarged side view of a portion A in FIG.
In FIG. _i Is a carbonized product, 30 is a container-sealed waste charging device provided on the upper side wall in the carbonization region 4c of the tunnel type furnace (: horizontal tunnel type furnace) 4, 31 is an upper seal valve, 32 is a lower seal The valve 33 is a container-sealed waste supply hopper, S is a space (: gap), and the other symbols are the same as in FIG.
[0023]
In FIG. 2, 4U is the ceiling of the tunnel-type furnace 4, 4L is the floor of the tunnel-type furnace 4, 31a is the upper seal valve when closed, 31b is the upper seal valve when opened, and 32a is closed The lower seal valve 32b is the lower seal valve when opened, 34 is a storage chamber before charging the container-sealed waste into the carbonization region in the tunnel-type heating furnace 4, and 35a is stored in the storage chamber 34 Container-sealed waste, 35b is the container-sealed waste in the tunnel-type heating furnace 4, 35c is the container-sealed waste being softened and melted, and the other symbols are the same as those shown in FIGS. Show.
[0024]
In the waste treatment method and waste treatment facility of the present invention (hereinafter referred to as the present invention), as shown in FIG. 1, the waste supplied from the waste inlet 20 (Excluding sealed container waste) Are compressed batchwise by the compressor 1 to obtain a close compression molded product 10a.
Next, the compression molded product 10a is pushed into the elongated tunnel type heating furnace 4 heated from the outside.
[0025]
The compression molded product in the tunnel-type heating furnace 4 is first dried by heating, and moisture is separated.
Next, while the temperature rises further and reaches about 600 ° C. and is maintained at a high temperature, the pyrolysis and carbonization of the organic matter in the waste proceeds and the volume shrinks, and the carbonized product 11 _i Is formed.
[0026]
Inside the tunnel heating furnace 4, the entrance 4 of the tunnel heating furnace 4 _E Since the new compression molded product is pushed in sequentially, the shrinking carbonized product is compressed in the traveling direction in the tunnel-type heating furnace, but since the force does not work from the vertical direction, the height is reduced by its own weight.
The degree of reduction due to the shrinkage in the height direction depends on the physical properties of the waste supplied from the waste inlet 20 and the amount of moisture contained therein, but usually a reduction of about 10 to 20% occurs.
[0027]
Moreover, the ceiling part 4U of the tunnel-type heating furnace 4 becomes higher from the waste supply side toward the high temperature reactor.
For this reason, in the vicinity of the end of the tunnel heating furnace 4 on the high temperature reactor 5 side, a space (: gap S) of about 10 to 40% of the height of the tunnel heating furnace is a carbonized product 11. _i And the ceiling 4U of the tunnel heating furnace 4.
[0028]
In the present invention, as shown in FIG. 1 and FIG. _i In the space S between the tunnel heating furnace 4 and the ceiling 4U Yong Supply closed container waste.
Container-sealed waste is generated mainly in the treatment of infectious medical waste.
Since infectious medical waste has the risk of causing pathogens to scatter into the atmosphere during disposal and infection to workers during handling, as described above, it must be sealed in a synthetic resin sealed container. It is discarded and transported, incinerated, etc. are carried out in this state.
[0029]
Various types of sealed containers are used, but a container having a size of about 0.25 mφ × 0.4 m is often used because of easy handling.
In the present invention, for example, container-sealed waste such as infectious medical waste stored in a synthetic resin-sealed container is tunnel-heated from the container-sealed waste supply hopper 33 shown in FIGS. The carbonized region 4c in the furnace 4 is charged.
[0030]
The internal temperature of the tunnel-type heating furnace 4 directly under the container-waste-type waste charging device 30 is about 600 ° C. and is slightly positive, so the charging device 30 has a gas seal. Therefore, a sealing mechanism is necessary.
That is, in the present invention, for example, as shown in FIG. 2, as a container-sealed waste charging device, an upper seal valve 31, a lower seal valve 32, and an upper seal valve 31 and a lower seal valve 32 are provided. It is preferable to use a charging device 30 having a storage chamber 34 provided.
[0031]
In the charging apparatus shown in FIG. 2, the upper seal valve 31 is opened to store the container-sealed waste in the storage chamber 34, the upper seal valve 31 is closed, and then the lower seal valve 32 is opened to close the container-closed waste. The object 35 is dropped into the tunnel heating furnace 4.
In the charging device shown in FIG. 2, a double swing swing type valve is used as the seal valve. However, the seal valve is of a certain type of gas seal such as a sluice valve, a ball valve, or a single swing valve. Any type of valve can be used, and its type is not particularly limited.
[0032]
In this case, it is also possible to detect the sealing failure due to the trapping of the container-sealed waste by detecting opening / closing of the seal valve.
In the carbonization region 4c, as described above, the carbonized product contracts and a space (: gap) S is formed in the upper part of the tunnel-type heating furnace 4, so that the container-sealed waste is charged into this upper space. In addition, the synthetic resin forming the container is softened and melted by the atmospheric temperature of about 600 ° C., and the infectious medical waste inside is also dried, pyrolyzed, and carbonized.
[0033]
Since the container is softened and melted inside the tunnel-type heating furnace, it is possible to prevent the infectious medical waste from being scattered from the charging device.
It is conceivable that the size of the upper space in the tunnel heating furnace varies depending on the properties of the waste pushed into the tunnel heating furnace 4 from the waste inlet 20.
However, even when the entire container does not enter the upper space in the tunnel-type heating furnace 4, the tunnel-type heating furnace 4 is maintained at a high temperature of about 600 ° C., so that the container is softened and melted and discarded inside the container. Drying, pyrolysis, and carbonization of the material proceed rapidly, and as shown in FIG. 2, the container-sealed waste is crushed by melting, dead weight, etc., and stored in the upper space of the tunnel-type heating furnace 4.
[0034]
In addition, carbonization products inside the tunnel-type furnace 11 _i Are sequentially pushed and moved to the high temperature reactor 5 side, so that the softened and melted sealed container and the waste inside are carbonized products 11. _i And is extruded into the high temperature reactor 5, and can be made completely harmless by combustion in the high temperature reactor 5 and melting of incombustible components.
Next, with reference to FIG. 3, the suitable arrangement | positioning position of the charging device 30 in the waste disposal facility of this invention is described.
[0035]
3 is the same waste treatment facility as FIG. 1, and in FIG. ₁ , O, and Oc indicate the following contents.
l: Entrance 4 of horizontal tunnel heating furnace 4 _E To the extrusion port 40 of the carbonized product obtained in the horizontal tunnel heating furnace 4 into the high temperature reactor 5.
l ₁ : Entrance 4 of horizontal tunnel-type furnace 4 _E To the center Oc of the opening of the container-closed waste inlet O.
[0036]
O: Container sealed waste charging inlet connected to the lower part of the lower seal valve 32 for charging the container sealed waste into the horizontal tunnel heating furnace 4.
Oc: Center of the opening of the container-sealed waste charging inlet O.
The charging device 30 in the waste treatment facility according to the fifth aspect of the present invention is an inlet 4 of the horizontal tunnel furnace 4. _E To the center Oc of the opening of the container-sealed waste charging inlet O ₁ Is preferably arranged so as to satisfy the following formula (1).
[0037]
l> l ₁ ≧ (1/2) × l ……… (1)
This is because the space S in the carbonization region 4c is surely formed immediately below the container-sealed waste inlet O by arranging the center Oc of the opening of the container-sealed waste inlet O at the position described above. This is because the container-sealed waste can always be charged into the horizontal tunnel heating furnace.
[0038]
As described above, the waste processing method and the waste processing facility of the present invention using the tunnel heating furnace have been described in detail. The present invention uses the tunnel heating furnace in which the space S is formed in the carbonization region of the waste. Applicable to waste treatment in general.
Furthermore, according to the present invention, the waste is scattered to the surroundings only by arranging a charging device having a simple sealing function on the side wall of the tunnel-type heating furnace corresponding to the space S of the carbonized region of the waste. Therefore, the present invention can be applied to various types of waste processing without being limited to the form and type of waste.
[0039]
【Example】
Hereinafter, the present invention will be described more specifically based on examples.
(Reference example)
Using the waste treatment facility having a waste treatment amount of 150 t / d scale shown in FIG. 1 described above, dust (: shredder dust) generated when crushing automobiles, home appliances, and the like was processed.
[0040]
In addition, the entrance 4 of the tunnel-type heating furnace 4 in the waste treatment facility shown in FIG. _E The cross section of the inner wall is a rectangle with a width of 2000 mm and a height of 500 mm. _E The compression support board 3 is inserted into the part from above.
After dropping the waste into the compressor 1 from the waste inlet 20 with the compression support plate 3 inserted, the compression cylinder 2 is set to 1000 t / m. ² The waste below the waste inlet 20 was compression-molded.
[0041]
As a result, the waste was reduced to a volume of about 1/10 between the compression cylinder 2 and the compression support plate 3 to obtain a compression molded product.
The cross-sectional shape of the obtained compression molded product is the inlet 4 of the tunnel heating furnace 4. _E It has the same shape and dimensions as the cross-sectional shape of the inner wall.
After compression, the compression support board 3 was extracted upward, and the compression cylinder 2 was further pushed in, so that the compression molding 10a obtained above was pushed into the tunnel heating furnace 4.
[0042]
Entrance 4 of tunnel type furnace 4 _E By pushing a new compression molded product from the above, the compression molded product already charged in the tunnel-type heating furnace 4 is sequentially pushed and moved while sliding in the tunnel-type heating furnace 4.
In this case, the cross section of the compression molded product and the inlet 4 of the tunnel heating furnace 4 _E Since the inner wall cross-section has the same shape and the same dimensions, the outer periphery of the compression molded product and the inner wall of the tunnel heating furnace 4 are held in close contact with each other when pushed into the tunnel heating furnace 4.
[0043]
The tunnel-type heating furnace 4 has a length of 20 m, and the other end of the tunnel-type heating furnace 4 is connected to the high temperature reactor 5.
The inside of the tunnel type heating furnace 4 was heated by a gas heater from the outside, and the inside was heated to about 600 ° C.
As a result, the above-mentioned compression-molded product is dried while moving in the tunnel-type heating furnace, and partially pyrolyzed. Finally, the carbonized product 11 includes carbides such as organic substances, minerals, metals, and the like. _n It becomes.
[0044]
The resulting carbonized product 11 _n Is the entrance 4 of the tunnel furnace 4 _E The volume is shrunk compared to the compression molded product of the _E In order to move while receiving pressure from the side, as shown in FIG. 1, in the carbonization region 4c on the tunnel heating furnace outlet side, a gap S is formed in the upper part, and the carbonized product 11 _n Is extruded into the high temperature reactor 5.
[0045]
On the other hand, the entrance 4 of the tunnel-type heating furnace 4 _E On the side, as described above, the outer periphery of the compression molding to be newly inserted and the inner wall of the tunnel-type heating furnace are in close contact, and on the outlet side, a gap is formed in the upper part due to the volume shrinkage of the compression molding. Therefore, water vapor and gas generated in the tunnel-type heating furnace by drying and thermal decomposition of the compression-molded product flow toward the tunnel-type heating furnace outlet and flow into the high-temperature reactor 5.
[0046]
The carbonized product extruded from the tunnel-type heating furnace 4 accumulates in the high temperature reactor 5, and the deposit contains oxygen-containing gas blown from the oxygen-containing gas blowing port 13 provided on the outer periphery of the lower portion of the high-temperature reactor 5. Combustion and pyrolysis with gas (: pure oxygen), the furnace atmosphere temperature is maintained at about 1200-1350 ° C. by this combustion heat, and the vicinity of the upper gas outlet 50a is also maintained at 1000 ° C. or higher.
[0047]
The residue after combustion and thermal decomposition (: non-combustible component) accumulates in the lower part of the furnace, but is melted by the combustion heat described above.
The molten residue is melted and collected on the hearth, and is discharged from the melt outlet 15H.
Extrusion port of the carbonized product into the high-temperature reactor 5 at the connection portion between the tunnel heating furnace 4 for supplying the carbonized product and the high-temperature reactor 5 (: charging port of the carbonized product into the high-temperature reactor 5) 40 lower end height L _L And height L of gas outlet 50a _H The gas and dust generated by heating, burning, and pyrolysis of the carbonized product were sufficiently burned and pyrolyzed.
[0048]
(Example)
The above-described waste treatment facility of the present invention shown in FIG. 1 was used to treat a synthetic resin sealed container (: synthetic resin container sealed waste) containing infectious medical waste.
The tunnel-type heating furnace 4 has a length of 20 m, and the synthetic resin container-sealed waste charging device 30 is used to extrude the upper side wall of the tunnel-type heating furnace 4 and the carbonized product of the tunnel-type heating furnace 4. It was installed 5m upstream from the mouth 40.
[0049]
That is, the distance l shown in FIG. ₁ , L ₁ = (3/4) × l.
As the charging device 30, the charging device shown in FIG. 2 was used, and double swing swing valves were installed in two stages to seal the inside and outside of the tunnel-type heating furnace.
In addition to processing office waste, shredder dust, etc. generated at steelworks on a scale of 150 t / d using the waste treatment facility of the present invention shown in FIG. 1 above, a sealed container made of synthetic resin Treatment of 5t / d of medical waste stored in
[0050]
The synthetic resin sealed container has a cylindrical shape of 0.25 mφ × 0.4 m, and its weight is approximately 20 kg / piece.
The above-mentioned synthetic resin container sealed waste was supplied from the charging device 30 into the tunnel-type heating furnace 4 at a supply rate of about 10 pieces / h.
Further, dust and exhaust gas in the exhaust gas were sampled at the exhaust gas outlet 50, and the amount of dust in the exhaust gas and the methane concentration in the exhaust gas were measured and analyzed.
[0051]
FIG. 4 shows changes in the amount of dust and the methane gas concentration in the exhaust gas during the period (comparison period) in which only the office waste and the shredder dust are treated and the implementation period of the present invention.
Dust amount in exhaust gas [: Dust generation amount per kg of treated waste (kg)] even in the implementation period of the present invention in which the synthetic resin container sealed waste is charged into the carbonization region in the tunnel heating furnace 4 In addition, the methane concentration in the exhaust gas was almost the same as that in the comparison period, and the plastic container sealed waste could be treated without any problems.
[0052]
Further, in this embodiment, the mixed residue of oxygen-containing gas (: pure oxygen) and propane gas is blown from the blowing port 14 at the lower part of the furnace, so that the residue after combustion accumulated in the lower part of the furnace is rapidly melted. I was able to.
In the above-described embodiment, the waste treatment method and the treatment equipment using the horizontal tunnel furnace are described. However, as described above, in the present invention, the space S is formed in the carbonization region of the waste. Applicable to all waste treatment using tunnel furnaces.
[0053]
【The invention's effect】
According to the present invention, waste can be safely and reliably processed without fear of scattering to the surroundings.
Furthermore, according to the present invention, container-sealed waste such as infectious medical waste stored in a hermetic container such as a synthetic resin hermetic container can be safely and reliably processed without fear of scattering the contents. Can contribute to the improvement of safety and hygiene in waste disposal, and its social significance is great.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a waste treatment facility according to the present invention.
2 is an enlarged side view of a portion A in FIG. 1. FIG.
FIG. 3 is a side view showing an example of a waste treatment facility according to the present invention.
FIG. 4 is a graph showing changes in the amount of dust in exhaust gas and the concentration of methane in exhaust gas during waste treatment.
FIG. 5 is a side view showing a conventional waste treatment facility.
[Explanation of symbols]
1 Waste compressor
2 Cylinder for compression
3 Compression support plate
4 Tunnel-type heating furnace (: Horizontal tunnel-type heating furnace)
4a Drying area of compression molding
4b Thermal decomposition zone of compression molding
4c Carbonization region of compression molding
4 _E Tunnel-type furnace entrance
4L tunnel heating furnace floor
4U tunnel heating furnace ceiling
5 High temperature reactor
10a, 10i compression molding
11 _i , 11 _n Carbonized compression molding (: Carbonized product)
12 Mixture of carbonized products and combustion residues
13 Oxygen-containing gas inlet
14 Inlet for mixed gas of oxygen-containing gas and combustible gas
15 Melt
15H Melt outlet
20 Waste input
21 Waste input cover
30 Container-sealed waste charging equipment
31 Upper seal valve
31a Upper seal valve when closed
31b Upper seal valve when open
32 Lower seal valve
32a Bottom seal valve when closed
32b Lower seal valve when open
33 Container-sealed waste supply hopper
34 Reservoir
35a Containerized waste stored in a storage chamber
35b Container-closed waste in tunnel furnace
35c Container-closed waste during softening and melting
40 Extrusion port of the carbonized product into the high temperature reactor 5 (: Charging product inlet into the high temperature reactor)
50 Exhaust gas outlet of high temperature reactor
50a High temperature reactor gas outlet
f ₁ Direction of movement of compression molding
f ₂ Movement direction of carbonized product
f _Three Flow direction of pyrolysis gas generated in a tunnel furnace
f _Four Blowing direction of oxygen-containing gas into the high-temperature reactor
f _Five Blowing direction of mixed gas of oxygen-containing gas and combustible gas into high temperature reactor
f ₆ Direction of movement of compression cylinder
f ₇ Direction of movement of compression support plate
f ₈ Direction of rotation of the lid of the waste input port
L _L Height of bottom of extrusion port into carbonized product high temperature reactor
L _H Gas outlet height of high temperature reactor
l Inlet 4 of horizontal tunnel furnace 4 _E To the extrusion port 40 into the high temperature reactor 5 of the carbonized product obtained in the horizontal tunnel furnace 4
l ₁ Entrance 4 of horizontal tunnel furnace 4 _E To the center Oc of the opening of the container-closed waste inlet O
O Container type waste waste inlet
Center of the opening of the Oc container sealed waste loading inlet
S space (: gap)

Claims (2)

A method of simultaneously treating waste (excluding container-sealed waste) and container-sealed waste with a high-temperature reactor in a vertical furnace in which the inside of the furnace is maintained at a positive pressure, the waste (container-sealed waste) horizontal batchwise pressurized using a tunnel type heating furnace provided with the exception of objects) on a side wall of said vertical furnace, a step of compressing, the resulting compression molded product, the said tunnel type heating furnace A process of pushing in while maintaining contact with the furnace inner wall , drying, pyrolysis, and carbonization, and a process of charging the obtained carbonized product into a high-temperature reactor, burning it, and melting incombustible components with processing in a way that having a said waste (excluding containers sealed waste) and separately from, the vessel sealed waste could on top of carbonized region of the tunnel type heating furnace Japanese to process by accompany the waste directly charged into the space (except for the container sealed waste) Waste processing method and. Compressor (1) that pressurizes and compresses waste (excluding container-sealed waste) batchwise, and the compression molding obtained from the compressor (1) for drying, pyrolysis, and carbonization In a waste treatment facility having a horizontal tunnel furnace (4) and a high-temperature reactor (5) for burning the carbonized product obtained in the horizontal tunnel furnace (4) and melting incombustibles A charging device for directly charging the container-sealed waste into the space formed above the carbonized region in the horizontal tunnel heating furnace (4) on the upper side wall of the horizontal tunnel heating furnace (4) (30), and the charging device (30) includes a supply hopper (33) for the container-sealed waste, and an upper seal valve (31) provided at a lower portion of the supply hopper (33), A storage chamber (34) connected to a lower portion of the upper seal valve (31), a lower seal valve (32) provided at a lower portion of the storage chamber (34), and a lower portion of the lower seal valve (32) Articulated Together constituted from a serial container sealed waste the horizontal tunnel furnace (4) container sealed to directly charged into the space made in the upper part of the carbonized region in the waste MonoSo inlet (O), The distance l ₁ from the inlet (4 _E ) of the horizontal tunnel furnace (4) to the center (Oc) of the opening of the container-sealed waste charging inlet (O) satisfies the following formula (1) Waste treatment facility characterized by.
L> l ₁ ≧ (1/2) × l (1)
Here, l ₁ is the distance from the inlet (4 _E ) of the horizontal tunnel-type heating furnace (4) to the center (Oc) of the opening of the container-closed waste charging inlet (O), and l is the horizontal tunnel The distance from the inlet (4 _E ) of the heating furnace (4) to the extrusion port (40) of the carbonized product obtained in the horizontal tunnel heating furnace (4) into the high temperature reactor (5) .

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