JP5391770B2 - Waste treatment apparatus and waste treatment method - Google Patents

Description

  The present invention relates to a waste treatment apparatus and a waste treatment method for gasifying and melting waste, and more particularly to a waste treatment apparatus and a waste treatment method capable of stably treating waste.

  Currently, the shortage of waste disposal sites is becoming prominent, and most of industrial waste and general waste are in landfills after being incinerated or reduced in volume as they are generated or after some pretreatment. Often, final disposal is performed. There are various methods for the incineration treatment 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. Is required.

  As a waste treatment method capable of such high-temperature treatment, waste treatment processes disclosed in Patent Documents 1 to 3 can be cited. In the above process, waste is compressed, molded, dried, pyrolyzed, carbonized, and the resulting carbonized product is partially oxidized and gasified to melt incombustibles to obtain fuel gas, slag, and metal. Is a process.

FIG. 2 is a side sectional view showing an example of a conventional waste treatment facility.
In FIG. 2, 1 is a compression device that pressurizes and compresses waste in batches (batch), 2 is a compression piston, 3 is a compression support board, 4 is compressed waste (compressed waste) (hereinafter referred to as “compressed waste”). Horizontal tunnel heating furnace (hereinafter also referred to as tunnel-type heating furnace) for drying and pyrolyzing the compression molded product), 4a is a drying region of the compression molded product, 4b is a thermal decomposition region of the compression molded product, 4e is an inlet of the tunnel-type heating furnace 4, 4f is an inlet of a compression molding provided on the side wall of the high-temperature reactor 5 (: outlet of the tunnel-type heating furnace 4), and 5 is a vertical high-temperature reactor (the upper part is a gas reformer). The material furnace 5a, the lower part is a gasification and melting furnace 5b), 6a and 6b are heating high-temperature gas flow pipes disposed in the side walls of the tunnel heating furnace 4, 10a and 10i are compression moldings, 11i and 11n, respectively. Is a dried compression molding, 12 is dried and pyrolyzed Deposited layer of waste 11 (hereinafter also referred to as a waste deposited layer), 14 is a melt, 14H is a melt outlet, and 15 is an oxygen-containing gas supply pipe for supplying an oxygen-containing gas to the lower part of the gasification melting furnace 5b. 15a is an oxygen-containing gas supply port, 16 is a horizontal cylindrical heating furnace connected to the lower side wall of the high-temperature reactor 5, a melt heating / warming furnace, 16e is an inlet of the melt heating / warming furnace, 17 is Combustion gas supply device (burner) for supplying high-temperature combustion gas into the melt heating and heat-retaining furnace, 20 is a waste inlet, 21 is a lid of the waste inlet, 30 is a high-temperature reaction discharged from the high-temperature reactor 5 quenching apparatus of the furnace generating the gas, 31 gas purifying apparatus, 32 the reformed gas outlet of the high temperature reaction furnace 5, 33 the purified gas, _{f 1} is compression molded product 10a, 10i moving direction of, _{f 2} was dried compression molded product 11i, 11n moving direction of, _{f 3} is tunnel The flow direction of the pyrolysis gas produced by the expression heating furnace 4, f ₄ is blowing direction of the oxygen-containing gas into the high temperature reaction furnace 5, f ₅ the direction of movement of the compression piston 2, f ₆ is compressed support plate 3 movement direction, f ₇ indicates the direction of rotation of the lid 21 of the waste inlet 20.

  In the waste treatment facility shown in FIG. 2, first, a predetermined amount of waste supplied from the waste inlet 20 into the compression apparatus 1 is compressed batchwise to form a compact compression molded product 10a. . Next, the compression molded product 10a is pushed into the elongated tunnel type heating furnace 4 heated from the outside.

  The cross-sectional shape of the compression molded product 10a is the same shape and the same size as the cross section of the inner wall of the inlet 4e of the tunnel-type heating furnace 4, and the compression molded product 10a is pushed in while being kept in contact with the inner wall of the tunnel-type heating furnace 4. The atmosphere inside the heating furnace can be sealed at the entrance of the tunnel-type heating furnace. The compression molded product 10i moves while sliding in the tunnel-type heating furnace 4 each time a new compression molded product is sequentially pushed.

  As described above, the tunnel-type heating furnace 4 is heated from the outside, and the temperature inside is increased to about 600 ° C. In the process of moving and raising the temperature of the compression molded product 10 i, moisture and volatile matter in the compression molded product 10 i are increased. Evaporated, volatilized, dried and pyrolyzed. The dried and pyrolyzed compression molded product 11n and the pyrolysis gas generated by the thermal decomposition enter the high temperature reaction furnace 5 maintained at 1000 ° C. or higher from the compression molded product inlet 4f provided on the side wall of the high temperature reaction furnace 5. Charged and supplied.

  The dried and pyrolyzed compression molding 11n supplied into the high-temperature reactor 5 is dried and pyrolyzed in the lower layer (gasification melting furnace 5b) of the high-temperature reactor 5 (deposited waste). A deposited layer 12) is formed. The oxygen-containing gas is supplied into the waste accumulation layer 12 from the oxygen-containing gas supply port 15a provided at the lower part of the gasification melting furnace 5b, and combustibles such as pyrolytic carbon of the waste 11 are combusted (partial oxidation / gas The waste energy 11 is further partially oxidized and gasified by the thermal energy, and incombustible components (metal, ash, etc.) in the waste 11 are melted to produce a melt 14. In the melt heating / insulating furnace 16 connected to the lower side wall of the high-temperature reactor 5, the melt 14 is heated with a high-temperature combustion gas supplied from a combustion gas supply device 17 such as a burner, and a trace amount contained in the melt. The carbon 14 and the like are gasified and removed, and the melt 14 is discharged as molten slag and molten metal from the melt outlet 14H.

  The pyrolysis gas charged into the high-temperature reactor 5 from the tunnel heating furnace 4 and the gas generated from the waste deposition layer 12 of the gasification melting furnace 5b are the upper part of the high-temperature reactor 5 (gas reforming furnace 5a). ) Is partly combusted and retained in the region where the gas temperature is 1000 ° C. or higher for 2 seconds or longer, reformed into a gas mainly containing carbon monoxide and hydrogen, discharged from the generated gas discharge port 32, and rapidly cooled. After cooling in the apparatus 30 and purification in the gas purification apparatus 31, it is recovered as a purified gas 33 for fuel.

  Generated by burning (partially oxidizing and gasifying) combustible materials such as pyrolytic carbon of the waste 11 with the oxygen-containing gas supplied from the oxygen-containing gas supply port 15a below the waste accumulation layer 12 The waste 11 is further partially oxidized and gasified with the heat energy of the high-temperature gas, and incombustible components (metal, ash, etc.) in the waste 11 are melted to produce a melt 14. The waste 11 in the waste accumulation layer 12 descends from the upper layer to the lower layer of the waste accumulation layer 12 as the partial oxidation / gasification of the combustible material and the melting of the incombustible material proceed. The high temperature gas generated during the combustion of the waste 11 below the waste accumulation layer 12 rises in the waste accumulation layer 12, and the rising high temperature gas is separated from the waste 11 falling in the waste accumulation layer 12. Counterflow heat exchange is performed to increase the sensible heat of the waste 11. The waste 11 having a large sensible heat is easily burned and pyrolyzed, and further heated to a temperature at which the incombustible component is easily melted in the lower layer of the waste accumulation layer 12.

As described above, the conventional waste treatment facility provided with the heating furnace, the high temperature reaction furnace, and the melt heating and heat insulation furnace has been described. However, the conventional waste treatment facility has the following problems.
If the waste supplied to the gasification and melting furnace is not sufficiently heated in the tunnel-type furnace, the residual amount of moisture and volatile matter increases in the waste and is generated at the bottom of the waste accumulation layer. The heat energy of the hot gas is consumed for the evaporation and gasification of the moisture and volatile components, and the waste is not sufficiently heated. As a result, the temperature of the waste when it is lowered to the vicinity of the oxygen-containing gas supply port at the lower part of the waste accumulation layer may be low, and the melt temperature generated by melting the incombustible component may be low. If the melt temperature is low, the melt flow becomes worse or the melt solidifies while the melt is discharged from the gasification melting furnace to the melt heating / warming furnace, resulting in poor melt discharge. Operation trouble will occur.

In addition, if there is a large amount of water and volatile matter in the waste supplied to the gasification melting furnace, the amount of water evaporated and the amount of volatiles that evaporate and volatilize while the waste descends the waste accumulation layer. In some cases, the moisture and volatile components are condensed at a location where the temperature above the waste deposition layer is relatively low, and the movement of the waste down the waste deposition layer may not be smoothly performed. When a waste descent failure occurs, the waste is suspended from the shelf, creating a space below the part where the descent failure occurred, or the waste suspended from the shelf above the space collapses at once and falls. phenomenon occurs, lowering of the waste becomes unstable. Therefore, heat exchange between the high temperature gas and waste is not performed sufficiently, and the temperature of the waste when lowered to the vicinity of the oxygen-containing gas supply port at the bottom of the waste accumulation layer is low, the melt temperature is low, as above This will cause operational troubles due to poor melt discharge.

  In addition, when a waste descent failure occurs in the waste accumulation layer, the partial oxidation / gasification of the waste becomes unstable along with this, and the amount of generated gas greatly fluctuates. If the amount of generated gas increases, problems such as not being able to secure a sufficient gas residence time for gas reforming in the gas reforming furnace occur, or pressure loss of the gas treatment system in the subsequent stage causes a problem in the furnace of the high temperature reactor. There is a problem that the internal pressure rises. As described above, when the amount of purified gas or the internal pressure of the high temperature reactor exceeds the threshold value, the amount of oxygen-containing gas supplied to the high temperature reactor is reduced, and feedback control is performed to reduce the gas generation amount. Along with a decrease in the amount of oxygen-containing gas supplied to the furnace, the amount of waste processing decreases, and a decrease in the amount of gas generated promotes fluctuations in the amount of gas generated, causing problems.

  As a measure to avoid such troubles due to a decrease in melt temperature, it is possible to supply fuel near the oxygen-containing gas supply port below the waste accumulation layer and burn the fuel to raise the melt temperature. There is a problem that the fuel cost is high.

JP-A-6-26626 JP-A-6-79252 JP-A-7-323270

  The present invention solves the above-mentioned problems of the prior art, and in a waste treatment apparatus and waste treatment method for partially oxidizing, gasifying, and melting waste, there is insufficient heating of the waste in the waste accumulation layer. An object of the present invention is to provide a waste processing apparatus and a waste processing method capable of preventing a descent failure and stably performing partial oxidation / gasification and melting of the waste.

As a result of intensive studies to solve the problems of the prior art described above, the present inventors have found that in a waste treatment apparatus provided with a high-temperature reactor comprising a conventional gasification melting furnace and a gas reforming furnace, gasification is performed. By providing an oxygen-containing gas upper supply port for supplying oxygen-containing gas to the upper part of the waste deposition layer in the melting furnace and an oxygen-containing gas lower supply port for supplying oxygen-containing gas to the lower part of the waste deposition layer, The present invention has been completed by finding out that the problems can be solved.
That is, the present invention is a waste treatment apparatus and a waste treatment method as described below.

(1) A heating furnace for heating the compressed waste, a gasification melting furnace for receiving the compressed waste from the heating furnace to form a waste deposition layer, partially oxidizing, gasifying and melting the waste, and In a waste treatment apparatus provided with a high-temperature reactor having a gas reforming furnace that is connected to the upper part of the gasification melting furnace and reforms the gas generated in the gasification melting furnace,
The gasification melting furnace has an oxygen-containing gas upper supply port for supplying oxygen-containing gas to the upper part of the waste deposition layer, and an oxygen-containing gas lower supply port for supplying oxygen-containing gas to the lower part of the waste deposition layer. , in the upper part of the waste deposited layer receives supply of the oxygen-containing gas from an oxygen-containing gas upper supply port, to generate a hot gas by partial oxidation and gasification of combustibles and some combustion of the waste, the hot Moisture and volatiles remaining in the waste are evaporated and volatilized by the thermal energy of the gas, and the waste with reduced moisture and volatiles is lowered to the bottom of the waste accumulation layer. Oxygen-containing gas is supplied from the lower part containing gas supply port, and the combustible part of waste with reduced moisture and volatile matter that has fallen from the upper part of the waste accumulation layer is partially oxidized and gasified to generate high-temperature gas , of the high temperature gas Further performs combustibles partial oxidation and gasification of the waste by the energy, waste treatment apparatus characterized in that to melt the non-combustible content in the waste.
(2) The oxygen amount of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port is controlled to 10 to 50% of the total oxygen amount of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port and the oxygen-containing gas lower supply port The waste treatment apparatus according to (1), further comprising an oxygen-containing gas supply amount control means.
(3) Oxygen that is controlled so that the oxygen concentration of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port is 50 vol% or more and the oxygen concentration of the oxygen-containing gas supplied from the oxygen-containing gas lower supply port is 80 vol% or more The waste gas treatment apparatus according to (1) or (2), wherein a contained gas oxygen concentration control means is provided.
(4) A gasification melting furnace that receives the compressed waste from a heating furnace that heats the compressed waste, forms a waste deposition layer, partially oxidizes, gasifies, and melts the waste, and a gasification melting furnace A waste treatment method using a high-temperature reactor having a gas reforming furnace connected to an upper part of the gas reforming furnace for reforming a gas generated in a gasification melting furnace,
An oxygen-containing gas is supplied to the upper part of the waste accumulation layer, and the combustible part of the waste in the waste accumulation layer is partially combusted to partially oxidize and gasify to generate high temperature gas, which is discarded by the thermal energy of the high temperature gas. Evaporate and volatilize water and volatile matter remaining in the material , lower the waste with reduced moisture and volatile content to the bottom of the waste deposit layer,
Supplying oxygen-containing gas to the lower part of the waste accumulation layer to generate high-temperature gas by partially oxidizing and gasifying the combustible part of the waste with reduced moisture and volatile content that has fallen from the upper part of the waste accumulation layer, A waste treatment method characterized by further performing partial oxidation and gasification of the combustible portion of the waste by the thermal energy of the high-temperature gas and melting the incombustible portion in the waste.

  According to the present invention, in a waste treatment apparatus and a waste treatment method for partially oxidizing / gasifying and melting waste, it is possible to prevent waste from being insufficiently heated and defective to fall within the waste accumulation layer. Partial oxidation, gasification, and melting can be performed stably.

It is a sectional side view which shows an example of the waste disposal facility of this invention. It is a sectional side view which shows the conventional waste disposal equipment.

Hereinafter, the present invention will be described in more detail.
In addition to providing an oxygen-containing gas lower supply port for supplying an oxygen-containing gas to the lower portion of the waste deposition layer in the gasification melting furnace of the high-temperature reactor of the waste treatment facility shown in FIG. Further, the present invention is characterized in that an oxygen-containing gas upper supply port for supplying an oxygen-containing gas is also provided above the waste deposition layer in the gasification melting furnace.
FIG. 1 is a side sectional view showing an example of the waste treatment facility of the present invention, and the present invention will be described based on FIG.
In FIG. 1, 13 is an oxygen-containing gas upper supply pipe for supplying the top to the oxygen-containing gas waste deposited layer 12 of the gasification melting furnace, 13a is an oxygen-containing gas upper supply port, f ₈ waste deposited layer 12 shows the direction in which the oxygen-containing gas is blown into the upper part of 12, 15 is an oxygen-containing gas lower supply pipe for supplying oxygen-containing gas to the lower part of the waste deposition layer 12 of the gasification melting furnace, and 15 a is an oxygen-containing gas lower supply port , f ₄ represents the blowing direction of the oxygen-containing gas into the lower portion of the waste deposited layer 12, other reference numerals denote the same contents as FIG.

  In the waste treatment facility shown in FIG. 1, the compression-molded waste (compression-molded product 10 i) is dried and pyrolyzed in the tunnel-type heating furnace 4, and the dried compression-molded product 11 n is converted into the high-temperature reactor 5. An oxygen-containing gas is placed on the upper part of the waste deposition layer 12 of the waste 11 charged in the high temperature reactor 5 through the compression molded product inlet 4f provided on the side wall and deposited in the gasification melting furnace 5b of the high temperature reactor 5. Oxygen-containing gas is supplied from the upper supply port 13a, the combustible part of the waste 11 is partly combusted, partially oxidized and gasified to generate a high temperature gas, and moisture remaining in the waste 11 by the thermal energy of the high temperature gas Then, the volatile matter is evaporated and volatilized, and the waste in which the moisture and the volatile content are sufficiently reduced is lowered into the waste accumulation layer 12.

  The oxygen-containing gas is supplied to the lower part of the waste accumulation layer 12 from the oxygen-containing gas lower supply port 15a provided at the lower part of the gasification melting furnace 5b, and the thermal decomposition of the waste 11 dropped from the upper part of the waste accumulation layer 12 Combustibles such as carbon are burned (partial oxidation / gasification), and the thermal energy further performs partial oxidation / gasification of the waste 11 and melts non-combustible components (metal, ash, etc.) in the waste 11. A melt 14 is produced. In the melt heating / insulating furnace 16 connected to the lower side wall of the high-temperature reactor 5, the melt 14 is heated with a high-temperature combustion gas supplied from a combustion gas supply device 17 such as a burner, and a trace amount contained in the melt. The carbon 14 and the like are gasified and removed, and the melt 14 is discharged as molten slag and molten metal from the melt outlet 14H.

The pyrolysis gas charged into the high-temperature reactor 5 from the tunnel heating furnace 4 and the gas generated from the waste deposition layer 12 of the gasification melting furnace 5b are the upper part of the high-temperature reactor 5 (gas reforming furnace 5a). ) Is partly combusted and retained in the region where the gas temperature is 1000 ° C. or higher for 2 seconds or longer, reformed into a gas mainly containing carbon monoxide and hydrogen, discharged from the generated gas discharge port 32, and rapidly cooled. After cooling in the device 30 and purification in the gas purification device 31, it is recovered as a purified gas 33 for fuel.
In this way, the waste is treated by partially oxidizing, gasifying and melting the waste 11.

By providing the above-described configuration, the present invention supplies an oxygen-containing gas to the upper part of the waste deposition layer charged from the tunnel-type heating furnace, thereby partially combusting the combustible matter of the waste. Oxidation / gasification generates high-temperature gas, and the heat energy of the high-temperature gas evaporates and volatilizes the water and volatiles remaining in the waste. Can be lowered into. The waste descending in the waste accumulation layer is sufficiently reduced in moisture and volatile matter, and is generated when the waste is burned by the oxygen-containing gas supplied at the bottom of the waste accumulation layer. It is sufficiently heated by the high-temperature gas, easily burned and pyrolyzed, and further heated to a temperature at which the incombustible component is easily melted in the lower layer of the waste accumulation layer.
Therefore, it is possible to prevent the occurrence of troubles due to the decrease in the melt temperature and the occurrence of problems due to the poor drop of the waste in the waste accumulation layer.

In the present invention, the oxygen amount of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port (the upper supply oxygen amount) is the total oxygen of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port and the oxygen-containing gas lower supply port. It is preferable to provide an oxygen-containing gas supply amount control means for controlling to 10 to 50% of the amount.
By providing such oxygen-containing gas supply amount control means, a part of the combustible part of the waste charged from the tunnel heating furnace is partially burned and partially oxidized and gasified at the upper part of the waste accumulation layer. The amount of oxygen consumed can be appropriately distributed when the combustible part of the waste that has descended the waste accumulation layer at the lower part of the waste accumulation layer is burned to be partially oxidized and gasified.

  If the upper supply oxygen amount is less than 10% of the total oxygen amount, it becomes insufficient to partially oxidize and gasify the combustible part of the waste in the upper part of the waste accumulation layer, and the generated high temperature gas There is little heat energy, and it becomes difficult to sufficiently reduce moisture and volatile matter remaining in the waste. In addition, when the upper supply oxygen amount is more than 50% of the total oxygen amount, the oxygen-containing gas supplied from the oxygen-containing gas lower supply port (lower supply oxygen amount) decreases, and the combustible waste in the lower part of the waste accumulation layer It becomes insufficient to partially oxidize and gasify by burning the component, and the heat energy of the generated high-temperature gas is small, making it difficult to sufficiently raise the temperature of the melt produced by melting the incombustible component. This causes problems such as melt discharge problems.

In the present invention, the oxygen concentration of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port is set to 50 vol% or more, and the oxygen concentration of the oxygen-containing gas supplied from the oxygen-containing gas lower supply port is set to 80% vol or more. It is preferable to provide oxygen concentration gas oxygen concentration control means to control.
By providing such oxygen-containing gas oxygen concentration control means, the combustible part of the waste charged from the tunnel heating furnace is partially burned at the upper part of the waste accumulation layer to be partially oxidized and gasified. In the lower part of the waste accumulation layer, it is possible to fully combust and partially oxidize and gasify the combustible part of the waste that has descended the waste accumulation layer, and the high temperature gas generated by each combustion The heat energy can be set to a sufficiently high level, and the process of smoothly oxidizing, gasifying and melting the waste can be performed smoothly.

  According to the present invention, it is possible to prevent the waste from being insufficiently heated or fall down in the waste accumulation layer, and to stably perform partial oxidation / gasification and melting of the waste. It can be suitably used as a waste treatment apparatus for gasification and melting treatment.

DESCRIPTION OF SYMBOLS 1 Compression apparatus 2 Piston for compression 3 Compression support board 4 Tunnel-type heating furnace 4a Drying area | region 4b of a compression molding product Thermal decomposition area | region 4e of a compression molding object Inlet of a tunnel type heating furnace (inlet of a compression molding object)
4f Tunnel heating furnace outlet (extruded dried product outlet)
5 High Temperature Reactor 5a Gas Reforming Furnace 5b Gasification Melting Furnace 6a, 6b High Temperature Gas Flow Pipe 10a, 10i Compression Molded Product 11 Waste 11i, 11n Dried Compression Product 12 Waste Deposit Layer 13 Gasification Melting furnace oxygen-containing gas upper supply pipe 13a Gasification melting furnace oxygen-containing gas upper supply port 14 Melt 14H Melt discharge port 15 Gasification melting furnace oxygen-containing gas lower supply pipe 15a Gasification melting furnace oxygen-containing gas lower supply port 16 Melt heating / retaining furnace 16e Melt heating / retaining furnace inlet (melt inlet)
17 Combustion gas supply device (burner)
20 Waste inlet 21 Waste lid lid 30 High temperature reactor generated gas quenching device 31 Gas purification device 32 High temperature reactor generated gas outlet 33 Purified gas f ₁ Direction of movement of compression molding f ₂ Dried Direction of movement of compression molding f ₃ Direction of flow of pyrolysis gas generated in tunnel type heating furnace f ₄ Direction of blowing oxygen-containing gas into lower part of gasification and melting furnace f ₅ Direction of movement of piston for compression f ₆ Compression support board Direction of movement f ₇ Direction of rotation of lid of waste charging port f ₈ Direction of blowing oxygen-containing gas into upper part of gasification melting furnace

Claims (4)

A heating furnace for heating the compressed waste, a gasification melting furnace for receiving the compressed waste from the heating furnace to form a waste deposition layer and partially oxidizing, gasifying and melting the waste, and the gasification melting In a waste treatment apparatus provided with a high temperature reactor having a gas reforming furnace that is connected to the top of the furnace and reforms the gas generated in the gasification melting furnace,
The gasification melting furnace has an oxygen-containing gas upper supply port for supplying oxygen-containing gas to the upper part of the waste deposition layer, and an oxygen-containing gas lower supply port for supplying oxygen-containing gas to the lower part of the waste deposition layer. , in the upper part of the waste deposited layer receives supply of the oxygen-containing gas from an oxygen-containing gas upper supply port, to generate a hot gas by partial oxidation and gasification of combustibles and some combustion of the waste, the hot Moisture and volatiles remaining in the waste are evaporated and volatilized by the thermal energy of the gas, and the waste with reduced moisture and volatiles is lowered to the bottom of the waste accumulation layer. Oxygen-containing gas is supplied from the lower part containing gas supply port, and the combustible part of waste with reduced moisture and volatile matter that has fallen from the upper part of the waste accumulation layer is partially oxidized and gasified to generate high-temperature gas , of the high temperature gas Further performs combustibles partial oxidation and gasification of the waste by the energy, waste treatment apparatus characterized in that to melt the non-combustible content in the waste.   Oxygen content that controls the oxygen amount of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port to 10 to 50% of the total oxygen amount of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port and the oxygen-containing gas lower supply port The waste treatment apparatus according to claim 1, further comprising a gas supply amount control unit.   Oxygen-containing gas oxygen that is controlled so that the oxygen concentration of the oxygen-containing gas supplied from the oxygen-containing gas upper supply port is 50 vol% or more and the oxygen concentration of the oxygen-containing gas supplied from the oxygen-containing gas lower supply port is 80 vol% or more The waste treatment apparatus according to claim 1, further comprising a concentration control unit. A gasification melting furnace that receives the compressed waste from a heating furnace that heats the compressed waste, forms a waste deposition layer, partially oxidizes, gasifies, and melts the waste, and an upper part of the gasification melting furnace A waste treatment method using a high-temperature reactor having a gas reforming furnace for reforming gas generated in a gasification melting furnace provided in a connected manner,
An oxygen-containing gas is supplied to the upper part of the waste accumulation layer, and the combustible part of the waste in the waste accumulation layer is partially combusted to partially oxidize and gasify to generate high temperature gas, which is discarded by the thermal energy of the high temperature gas. Evaporate and volatilize water and volatile matter remaining in the material , lower the waste with reduced moisture and volatile content to the bottom of the waste deposit layer,
Supplying oxygen-containing gas to the lower part of the waste accumulation layer to generate high-temperature gas by partially oxidizing and gasifying the combustible part of the waste with reduced moisture and volatile content that has fallen from the upper part of the waste accumulation layer, A waste treatment method characterized by further performing partial oxidation and gasification of the combustible portion of the waste by the thermal energy of the high-temperature gas and melting the incombustible portion in the waste.

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