JPH11270824A - Waste treatment and facility therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stable and reliable treatment by heating a compact obtained by compressing a waste extracting gas generated by drying the compact through a drying, a thermal decomposition and a carbonization, and generating molten material and a fuel gas by heating the obtained carbonization products. SOLUTION: A compact 10a is obtained by charging a waste into the inside of a compression device 1, and by compressing and molding the waste between a compression cylinder 2 and a compression support base 3. The compact 10a is pushed into a tunnel-like heating furnace 4 and is dried while being transferred. Accordingly, the compact 10a is partially thermally decomposed and finally carbonization products such as organic substances are generated and the carbonization products are pushed into the inside of a high temperature reactor 5. Besides, gas such as steam generated by drying and thermal decomposition is sucked and extracted from a gas extracting opening 33 by means of an exhauster 32, and the steam is condensed and removed by a cooler 30 and then is again supplied to the high temperature reactor 5 or the like. Then, the carbonization products are burned and thermally decomposed by a gas containing oxygen from a blow-through opening 13 and thereafter is melted by combustion heat of a gas containing oxygen and a propane gas supplied from a blow- through opening 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment method and a waste treatment method capable of stably treating various wastes having different calorific values in a waste treatment facility for melting and gasifying wastes. It relates to material processing equipment.

[0002]

2. Description of the Related Art At present, a shortage of waste disposal sites has become apparent, and many industrial wastes or general wastes are incinerated and discarded as they are generated or after some pretreatment. Final disposal, such as landfill, is often performed after it has been converted. There are various methods of incineration described above, but in recent years, management of harmful substances such as dioxin in generated gas at incineration plants has become a problem, and toxic substances can be decomposed in a high-temperature oxidizing atmosphere. There is a demand for a simple processing method.

[0003] As waste treatment methods capable of such high-temperature treatment, JP-A-6-26626 and JP-A-6-79252.
And a waste disposal process disclosed in Japanese Patent Application Laid-Open No. 7-323270. These are waste treatment processes in which waste is compressed, molded, dried, thermally decomposed, carbonized, and the generated carbide is melted and gasified to obtain a fuel gas.

FIG. 5 is a side view showing the above-mentioned conventional waste treatment facility. In FIG. 5, reference numeral 1 denotes a compression device for pressurizing and compressing waste in a batchwise (batch) manner; 2, a compression cylinder; 3, a compression support plate; Tunnel-type heating furnace for drying, pyrolyzing and carbonizing the compressed molded product), 4a is the drying region of the compressed molded product, 4b is the thermal decomposition and carbonizing region of the compressed molded product, 4
_E is the entrance of the heating furnace 4 of the tunnel type, 5 is the high temperature reactor, 10
a and 10i are compression molded products, 11 _i and 11 _n are carbonized compression molded products (hereinafter also referred to as carbonized products), 12 is a mixture of carbonized products and combustion residues, 13 is an oxygen-containing gas blowing port, 14 is Melt, 14H: melt outlet, 15: flammable gas and oxygen-containing gas inlet, 16: oxygen inlet, 20: waste inlet, 21: lid of waste inlet, 40: tunnel type An outlet for the carbonized product in the heating furnace 4 (the inlet of the carbonized product into the high-temperature reactor 5); 50, a quenching device for the exhaust gas (hereinafter also referred to as generated gas) discharged from the high-temperature reactor 5; 51 gas purifier, 52 gas outlet of the high temperature reactor 5, the purified gas 53, f ₁ is the compression-molded product 10a, 10i moving direction of, f ₂ is carbonized product 11 _i, 11 _n the direction of movement of, f ₃ is the flowing direction of the tunnel pyrolysis gas generated in the heating furnace 4, f ₄ is blowing oxygen-containing gas into the hot reactor 5 Direction, f ₅ is the moving direction of the compression cylinder 2, f ₆ is the direction of movement of the compression support plate 3, f ₇ direction of rotation of the lid 21 of the waste inlet 20, f ₈ is a combustible gas and oxygen-containing gas blowing direction, f ₉ shows a blowing direction of the oxygen.

In the waste treatment equipment shown in FIG. 5, first, a predetermined amount of waste supplied from the waste inlet 20 into the compression device 1 is compressed in a batchwise manner using the compression device 1. Then, a compact compression molded product 10a is obtained. Next, the compression-molded product 10a is pushed into an elongated tunnel-type heating furnace (hereinafter referred to as a tunnel-type heating furnace) 4 which is heated from the outside.

At this time, the water contained in the waste is
It is squeezed out in the above-mentioned compression step, and is pushed into the tunnel type heating furnace 4 together with the waste. Cross-sectional shape of the compression molded product 10a has an inner wall section having the same shape of the inlet 4 _E of the tunnel type heating furnace 4, the same size, the compression molded product 10a pushes the compression molded product 10a is in contact with the inner wall of the tunnel type heating furnace 4 Since it is pushed in while maintaining the state, the atmosphere in the heating furnace can be sealed at the entrance of the tunnel heating furnace.

[0007] Each time a new compression molded product is pushed in, the compression molded product 10i slides inside the tunnel heating furnace 4 and moves. The tunnel heating furnace 4 is heated from the outside as described above, and the inside is heated to about 600 ° C.
In the process of moving and heating the compression molded product 10i, the compression molded product
10i dry, pyrolyze and carbonize.

[0008] 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. Thereafter, the combustibles in the carbonized product containing minerals and metals are burned by the oxygen-containing gas, pyrolyzed, and gasified. In this case, by adjusting the amount of oxygen in the oxygen-containing gas, the generated gas discharged from the high-temperature reactor 5 can be recovered as a fuel gas containing carbon monoxide and hydrogen (hereinafter also referred to as fuel gas).

[0009] The residue (non-combustible portion) that is not gasified by combustion or thermal decomposition is melted in the high-temperature reactor 5 to form a molten material 14 composed of molten metal and molten slag. It is recovered from the lower melt outlet 14H.
According to the above-described waste treatment method, solid waste containing a certain amount of water can be treated as described above.

Therefore, there is an advantage that even general waste such as garbage can be easily treated. However, when the amount of water in the waste is large, the amount of heat required for drying in heating in a tunnel heating furnace or the like increases. Generally, the calorific value of waste is determined by the amount of combustible elements per unit weight of waste including moisture (:
Steam (from carbon, hydrogen, etc.)
The evaluation is based on the so-called lower heating value obtained by subtracting the latent heat of vaporization of the steam generated by the combustion of hydrogen and the steam generated by the contained moisture.

In the case of the above-mentioned waste treatment equipment, in order to stably perform melting, gasification in a high-temperature reactor after drying, pyrolysis, and carbonization in a tunnel-type heating furnace, a calorific value of 1500 kcal / kg or more. is necessary. However, there is no such thing as fuel such as inorganic sludge or combustion ash in the waste,
Some have low calorific values and others have low calorific values due to high water content such as organic sludge.

Therefore, in the above-mentioned waste treatment equipment, as described above, waste having a high calorific value of 1500 kcal / kg or more and waste having a low calorific value such that the low calorific value is less than 1500 kcal / kg as described above. It is important to stably process things. In the following description, the heat value indicates a lower heat value. When the waste having a large amount of the above-mentioned water and a low calorific value is mixed, drying in the waste treatment facility described above, thermal decomposition, and drying in the tunnel-type heating furnace serving as a carbonization step require time, and sufficient thermal decomposition, Carbonization may not proceed.

If waste that is not sufficiently carbonized in the tunnel furnace is charged into the high-temperature reactor, an endothermic reaction such as thermal decomposition and carbonization occurs in the high-temperature reactor. descend. Also, to avoid this trouble, even if the waste with a large amount of water and low calorific value is mixed with other waste for treatment, it is difficult to uniformly mix the waste. As a result, the degree of carbonization of the waste charged into the high-temperature reactor fluctuates over time, which causes the temperature of the high-temperature reactor to fluctuate over time.

Therefore, when treating waste having a low calorific value, it is necessary to perform an operation with excessive heat input in order to avoid poor thermal decomposition of gas due to temperature fluctuations in the high-temperature reactor and poor melting of incombustible components. And the processing amount was substantially reduced. Also, when processing waste with a low calorific value, undecomposed hydrocarbons increase in the generated gas (: exhaust gas) discharged from the upper part of the high-temperature reactor, which causes rapid cooling of the gas and troubles in the refining process. Becomes

On the other hand, according to the above-mentioned waste treatment equipment,
Auxiliary fuel such as coke for melting the incombustibles is not required, and the incombustibles in the waste can be melted by the heat of combustion of the waste. However, when simultaneously processing low-calorie waste such as inorganic sludge and incineration ash and high-calorie combustible waste, if each waste is in a separate lump, the calorific value will decrease. When moving low-level waste through a tunnel-type furnace, it is necessary to increase the drying area, and when moving high-calorie combustible waste through a tunnel-type furnace, use a thermal decomposition and carbonization area. It needs to be long.

For this reason, when there are many wastes having a low calorific value, the high temperature portion in the tunnel type heating furnace moves to the high temperature reactor side, and the combustible waste having a high calorific value is sufficiently generated in the tunnel type heating furnace. A problem arises in that carbonization cannot be performed, and it is difficult to stably maintain the temperature of the high-temperature reactor at a high temperature. Also, when mixing low calorific value waste such as inorganic sludge and incinerated ash with high calorific value waste such as waste plastic and cellulose, low calorific value waste has a large bulk density and high calorific value. Since the bulk density of the product is small, it is not easy to mix uniformly.

Therefore, conventionally, it is impossible to simultaneously treat wastes having greatly different calorific values, and if it is necessary to treat the wastes at the same time depending on the circumstances of the waste generation,
In order to avoid a decrease in the temperature in the high-temperature reactor, the operation was performed so that the throughput was reduced so that the temperature in the high-temperature reactor did not suddenly decrease. For this reason, according to the conventional waste treatment method and waste treatment equipment, it was not possible to avoid a decrease in the amount of waste treated.

[0018]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and is capable of melting and gasifying various wastes in a waste treatment facility without reducing the throughput. An object of the present invention is to provide a waste treatment method and a waste treatment facility capable of stably treating waste.

[0019]

In the above-mentioned waste treatment facility shown in FIG. 5, the compression molded products 10a and 10i supplied from the waste inlet 20 and compressed by the compression device 1 are used in a tunnel heating furnace. The water is evaporated from the outside in the drying area 4a because the inside of the drying area 4 is heated. The steam generated in the drying zone 4a flows through the tunnel heating furnace 4 toward the high-temperature reactor 5 and is converted into hydrogen and carbon monoxide by the reaction with carbon in the high-temperature reactor 5, or the steam remains at a high temperature. It is discharged from the reactor 5.

Since the above-mentioned reaction between water vapor and carbon is an endothermic reaction, an increase in moisture in the waste is one of the factors that lower the temperature in the high-temperature reactor 5. Further, even when the steam is discharged from the high-temperature reactor 5 as it is, it is necessary to apply sensible heat for raising the temperature of the steam generated in the tunnel-type heating furnace to the exhaust gas temperature of the high-temperature reactor 5. When the amount of water in the waste increases, the amount of heat for keeping the temperature inside the furnace of the high-temperature reactor 5 at 1000 ° C. or more becomes insufficient.

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, they found that the problems can be solved by the following methods (1) to (3) and equipment. Invented the invention. (1) Extraction of a steam-containing gas from a heating furnace for heating, drying, pyrolyzing, and carbonizing a compression-molded product (first invention, second invention, and fifth invention): Since gas such as steam generated from the tunnel heating furnace in the tunnel heating furnace 4 flows near the upper wall of the tunnel heating furnace 4 toward the high-temperature reactor 5, the gas is transferred to the upper part of the tunnel heating furnace. From the wall or the side wall, the high-temperature pyrolysis gas and the combustion gas generated in the high-temperature reactor 5 can be separately extracted.

Further, in the tunnel type heating furnace 4, the moisture of the waste is first evaporated, and after the evaporation of the moisture is completed, the temperature of the waste is further raised, and then the thermal decomposition and carbonization proceed. As a result, in the tunnel type heating furnace, the evaporation region of moisture (: drying region 4a of the compression molded product) and pyrolysis, and the carbonization region (: pyrolysis of the compression molded product, carbonization region 4b) are the length of the tunnel heating furnace. In the vertical direction.

For this reason, the steam generated in the portion where the evaporation of water is the most intense is taken out of the tunnel type heating furnace, so that the amount of steam flowing into the high temperature reactor 5 is reduced.
The amount of endothermic reaction due to the reaction between steam and carbon in the high temperature reactor 5 can be suppressed. Furthermore, according to the above method, pyrolysis, the high-temperature gas generated in the carbonization region,
Since the gas rising in the high-temperature reactor is sucked into the high-temperature reactor and flows into the high-temperature reactor, the gas to be extracted is mainly composed of steam generated in the drying area, and the required capacity of the cooler for removing steam is small. Good.

(2) Compression and heat treatment of both pre-dried waste having a low calorific value and waste having a high calorific value (third invention): after pre-drying waste having a large amount of moisture and a low calorific value By compressing with a waste having a high calorific value and treating it with a heating furnace and a high-temperature reactor, which are preferably a tunnel heating furnace, the above-mentioned problems of the prior art can be solved, and a waste having a low calorific value can be reduced. It can melt and gasify by using the heat of combustion of waste with high calorific value, and improve the volumetric efficiency of waste treatment equipment, enabling waste to be treated with compact equipment. .

(3) Direct drying and treatment of pre-dried low calorific value waste into a high temperature reactor, compression of high calorific value waste, and heat treatment (fourth invention): large amount of moisture and calorific value After pre-drying low waste, it is directly charged into the high-temperature reactor and treated, and the waste with high calorific value is compressed,
By treating in a heating furnace and a high-temperature reactor, which are preferably tunnel heating furnaces, it is possible to solve the above-mentioned problems of the prior art and to reduce waste having a low calorific value and combustion heat of waste having a high calorific value. It can be used for melting and gasification.

That is, in the first invention, a step of compressing waste, a step of heating the obtained compression molded product, and extracting a gas generated by drying while drying, thermally decomposing, and carbonizing, are obtained. A waste treatment method comprising a step of heating a carbonized product to generate a melt and a fuel gas. The preferred embodiment of the first aspect of the present invention includes a step of batch-pressing and compressing the waste, and a step of charging the obtained compression-molded product into a tunnel-type heating furnace, drying, pyrolyzing, and carbonizing the waste. Extracting gas from the tunnel heating furnace,
Charging the carbonized product obtained in the step into a high-temperature reactor,
A waste disposal method comprising a step of melting and gasifying.

In the preferred embodiment of the first aspect of the present invention, preferably, the tunnel is formed from the upper wall and / or the side wall of the compression molded product of the tunnel type heating furnace, and more preferably from the upper wall. It is preferable to extract gas from the heating furnace. In this case, the region extracting gas in the drying region 4a described above, the extrusion port 40 direction distance l ₁ of the tunnel type heating furnace inlet 4 _E carbonization product of a tunnel type heating furnace STARTING FROM is below Equation (1)
Is preferably a region of l ₁ satisfying the news, it is more preferably a region of l ₁ satisfying the following formula (2).

(1/2) · l ≧ l ₁ > 0 (1) (1/2) · l ≧ l ₁ ≧ (1/10) · l (2) Here, l represents the distance from the tunnel heating furnace inlet _4E to the carbonized product extrusion port 40 of the tunnel heating furnace.
The drying area of the tunnel heating furnace may expand or shrink in accordance with the amount of water contained in the waste being treated, but a gas outlet is installed in the first half of the total length of the tunnel heating furnace. If this is done, it is possible to extract gas substantially from the steam generation site.

Therefore, as shown in the above equation (1), it is preferable to set l ₁ in a region from the entrance 4 _E of the tunnel heating furnace to a position at a distance of (１ ／) · l. Further, as described above, since the compression molded product is pushed into the entire inner wall shape of the entrance portion and serves as a seal of the atmosphere in the tunnel type heating furnace, as the gas outlet, as shown in equation (2) described above, from the inlet 4 _E of tunnel furnace (1/10)
It is more preferable to set l ₁ in a region up to a position at a distance of l and a position at a distance of (１ ／) · l.

According to a second aspect of the present invention, in the first aspect of the present invention, a gas generated by drying the above-mentioned compression-molded product is extracted, moisture in the gas is removed, and the gas from which the moisture has been removed is dried, A waste treatment method characterized in that the method comprises a step of pyrolyzing and carbonizing or a step of heating a carbonized product and feeding it to one or both of a step for producing a melt and a fuel gas.

A preferred embodiment of the above-mentioned second invention comprises a step of batch-wise pressurizing and compressing the waste, and a step of charging the obtained compression-molded product into a tunnel-type heating furnace, followed by drying, pyrolysis, A step of carbonizing and extracting gas from the tunnel heating furnace, and a step of charging the carbonized product obtained in the step into a high-temperature reactor, melting and gasifying, A waste treatment method characterized by removing moisture in the gas extracted from the furnace and feeding the gas from which the moisture has been removed to one or both of the tunnel heating furnace and the high-temperature reactor. is there.

In the preferred embodiment of the second aspect of the present invention, preferably, the tunnel is formed from the upper wall and / or the side wall, more preferably, from the upper wall of the drying region 4a of the compression molded product of the tunnel heating furnace. It is preferable to extract gas from the heating furnace. In this case, the region extracting gas in the drying region 4a described above, the extrusion port 40 direction distance l ₁ of the tunnel type heating furnace inlet 4 _E carbonization product of a tunnel type heating furnace STARTING FROM is below Equation (1)
Is preferably a region of l ₁ satisfying the news, it is more preferably a region of l ₁ satisfying the following formula (2).

(1/2) · l ≧ l ₁ > 0 (1) (1/2) · l ≧ l ₁ ≧ (1/10) · l (2) Here, l represents the distance from the tunnel heating furnace inlet _4E to the carbonized product extrusion port 40 of the tunnel heating furnace.
A third aspect of the present invention relates to a step of compressing a waste having a low calorific value together with a waste having a high calorific value after previously performing a drying treatment to remove a part or all of the water and a compression molded product obtained in the step. A step of heating, drying, pyrolyzing, and carbonizing; and a step of heating a carbonized product obtained in the step to generate a melt and a fuel gas.

According to a preferred aspect of the third aspect of the present invention, the waste having a low calorific value is subjected to a drying treatment in advance to remove a part or all of the moisture, and then pressurized batchwise with the waste having a high calorific value. , Compressing, charging the obtained compression molded product into a tunnel heating furnace, drying, pyrolyzing, and carbonizing, and charging the carbonized product obtained in the process into a high-temperature reactor. And a step of melting and gasifying the waste.

A fourth aspect of the present invention includes a step of compressing waste,
The compression molded product obtained in the step is heated, dried, thermally decomposed,
It has a process of extracting gas generated by drying while carbonizing, and a process of heating a carbonized product obtained in the process to generate a melt and a fuel gas. And removing part or all of the water and directly supplying it to the step of generating the melt and the fuel gas.

In a preferred aspect of the fourth aspect of the present invention, there is provided a step of batch-wise pressurizing and compressing the waste, and charging the compression-molded product obtained in the step into a tunnel-type heating furnace, drying and compressing the waste. Pyrolysis, carbonization step, charging the carbonized product obtained in the step into a high-temperature reactor, melting and gasifying step, the above-mentioned pressurization, compression of waste with high calorific value Process, feed into a tunnel type heating furnace, high temperature reactor, pressurize, compress,
After drying, pyrolysis, carbonization, melting, and gasification, the waste having a low calorific value is dried in advance to remove part or all of the water, and then directly charged into the high-temperature reactor described above. , Melting and gasification.

In the above-described second to fourth inventions or the preferred embodiments of the second invention to the fourth embodiment, the step of producing the above-described melt and fuel gas by removing the removed water ( : High-temperature reactor) is preferably used as cooling water and / or washing water for generated gas discharged from the high-temperature reactor. A fifth aspect of the present invention relates to a compression apparatus 1 for compressing waste, a heating furnace 4 for drying, pyrolyzing, and carbonizing a compression molded product obtained by the compression apparatus 1, and a carbonization product obtained by the heating furnace 4. A high-temperature reactor 5 for heating the product to generate a melt and a fuel gas; a gas outlet 33 for extracting gas generated by drying from the heating furnace 4; and a cooling device for cooling the extracted gas to condense and remove moisture. Waste treatment equipment comprising a reactor 30 and a gas extraction / feed device 39 for feeding the gas from which moisture has been removed to one or both of the heating furnace 4 and the high-temperature reactor 5 described above. It is.

The preferred embodiment of the fifth aspect of the present invention provides a compression apparatus 1 for pressurizing and compressing waste in batches,
A tunnel-type heating furnace 4 for charging, drying, pyrolyzing, and carbonizing the compression molded product obtained in
A high-temperature reactor 5 for melting and gasifying the carbonized product obtained in the above, and further, a gas outlet 33 provided in the drying region 4a of the compression-molded product of the tunnel heating furnace 4 described above;
Cooler 30 for cooling the extracted gas and condensing and removing moisture
And waste gas having a gas extracting and feeding device 39 for feeding the gas after moisture removal to one or both of the tunnel heating furnace 4 and the high-temperature reactor 5 described above. Processing equipment.

In the preferred embodiment of the fifth invention described above, preferably, from the upper wall and / or the side wall of the drying region 4a of the compression molded product of the tunnel heating furnace 4, more preferably from the upper wall. It is preferable to extract gas from the tunnel heating furnace. Further, in a preferred embodiment of the fifth invention described above, the gas extraction port 33 provided in the drying zone 4a of the above-described tunnel type compression molding of the heating furnace 4, a starting point inlet 4 _E of the tunnel type heating furnace It is preferable that the distance l _{1 in the} direction of the extrusion port 40 of the carbonized product of the tunnel type heating furnace provided in the region of l ₁ satisfying the following expression (1) is a gas extraction port. ) and more preferably is a gas discharge outlet provided in the region of l ₁ that satisfies.

(1/2) · l ≧ l ₁ > 0 (1) (1/2) · l ≧ l ₁ ≧ (1/10) · l (2) Here, l represents the distance from the tunnel heating furnace inlet _4E to the carbonized product extrusion port 40 of the tunnel heating furnace.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the first to fifth aspects of the present invention will be described.
The invention will be described in more detail. [First Invention, Second Invention, Fifth Invention:] FIG. 1 shows an example of a waste treatment facility according to the first invention, the second invention, the fifth invention, and a preferred embodiment of each invention. Is shown by a side view.

In FIG. 1, 30 is a gas cooling cooler for cooling gas to condense and remove moisture, 31 is condensed water, 32 is an exhaust fan, and 33 is provided on the upper wall of the dry area 4a of the compression molded product. Gas outlets, 34, 35, 36, and 38 are pipes, 37 is a valve, 39 is a gas vent composed of exhaust 32, pipes 34, 35, 36, valves 37, etc. distance from the inlet 4 _E of the heating furnace up to extrusion port 40 of the carbonization product of a tunnel type heating furnace, l ₁ is extruded carbide products of a tunnel type heating furnace starting from the inlet 4 _E of tunnel furnace opening 40 Direction distance l
₁ and the other symbols indicate the same contents as in FIG. 5 described above.

In the waste treatment equipment according to the present invention, it is more preferable to use a tunnel heating furnace as a device for heating, drying, pyrolyzing, and carbonizing the waste compression molded product. That is, the waste treatment facility according to each preferred embodiment of the first invention, the second invention, and the fifth invention uses a tunnel-type heating furnace, and as shown in FIG.
4a is provided with a gas outlet 33 for extracting gas from the tunnel heating furnace 4.

Tunnel type heating furnace 4 near the waste inlet 20
In the inner drying area 4a, the temperature of the waste increases due to the amount of heat supplied from the outer wall of the tunnel heating furnace, and the moisture in the waste evaporates. The water vapor generated in the drying area 4a is usually
The gas flows through the tunnel-type heating furnace 4 to the high-temperature reactor 5 side. In the present invention, the gas in the tunnel-type heating furnace 4 is drawn out of the tunnel-type heating furnace 4 by sucking the gas in the tunnel-type heating furnace 4 from the gas extraction port 33 described above.

In the waste treatment equipment to which the present invention is applied, the inside of the high-temperature reactor 5 must be maintained at a temperature of 1000 ° C. or more.
If it is not more than kcal / kg, the operation will be unstable. For example,
Low calorific value 50% in waste with calorific value of 1500kcal / kg
When 40% of the water is extracted from the tunnel heating furnace 4 and removed, the load of the high-temperature reactor 5 treats waste having a lower calorific value of about 3200 kcal / kg. It becomes the same as that.

For this reason, by removing and removing the water contained in the waste from the inside of the tunnel type heating furnace 4, it becomes easy to maintain the furnace temperature of the high temperature reactor 5 at 1000 ° C. or more, and to stabilize the operation. can do. In addition, as a region for extracting gas in the above-described drying region 4a,
In order to selectively extract water vapor, the distance l _{1 in the} direction of the carbonized product extruding port 40 starting from the entrance 4 _E of the tunnel type heating furnace, which satisfies the following expression (1), is defined as l _1.
Is more preferable, and more preferably, a region of l ₁ satisfying the following formula (2).

(1/2) · l ≧ l ₁ > 0 (1) (1/2) · l ≧ l ₁ ≧ (1/10) · l (2) Here, l represents the distance from the tunnel heating furnace inlet _4E to the carbonized product extrusion port 40 of the tunnel heating furnace.
By cooling the gas extracted from the tunnel heating furnace 4 in the cooler 30, water vapor can be condensed and separated.

The condensed water 31 can be used for cooling and / or washing generated gas (: exhaust gas) discharged from the high-temperature reactor 5 in a later step. According to the present invention,
By bringing the condensed water 31 into direct contact with the generated gas discharged from the high-temperature reactor 5, cooling and washing the generated gas,
The following effects can be obtained.

The water in the waste can be effectively used, and the amount of fresh water used can be reduced. : Since the amount of water to be treated in the purification treatment of condensed water and the purification treatment of water used for cooling and washing is reduced, the size of the water treatment equipment can be reduced. Further, according to the present invention, the non-condensed gas component is blown into one or both of the tunnel heating furnace 4 and the high-temperature reactor 5 again, whereby the high-temperature reactor 5 is cooled.
Components having an odor are also oxidized in the inside, so that treatment such as deodorization becomes unnecessary.

When the gas from which water has been removed is blown into the tunnel type heating furnace 4, for example, as shown in FIG. 1, it may be blown into a void formed above the pyrolysis and carbonization region 4b. When the gas is blown into the high-temperature reactor 5, the gas is blown into the vicinity of the connection between the tunnel heating furnace 4 and the high-temperature reactor 5, so that the residence time of the blown gas in the high-temperature reactor 5 can be secured. Even if the blown gas contains a hydrocarbon component, it can be decomposed and is suitable.

[Third Invention:] FIG. 2 is a side view showing an example of a waste treatment facility according to the third invention and a preferred embodiment of the third invention. In FIG. 2, 20A and 20B are waste inlets, 60 is a drying device, 61 is waste, 62 is a stirrer,
70 a belt conveyor, f ₁₁ denotes a moving direction of the waste after drying, the other reference numerals indicate the same contents as FIG. 1, FIG. 5 described above.

In the waste treatment equipment according to the present invention, it is more preferable to use a tunnel heating furnace as a device for heating, drying, pyrolyzing and carbonizing the waste compression molded product. That is, the waste treatment facility according to the preferred aspect of the third invention uses a tunnel heating furnace. A third aspect of the present invention is to solve the above-mentioned problems of the present invention, that is, to stably treat waste without causing a decrease in treatment amount in a waste treatment facility for melting and gasifying various wastes. Preferably, as shown in FIG. 2, before the waste having a large amount of water and a low calorific value is charged into the tunnel heating furnace 4, a drying apparatus is separately provided.
After drying at 60, this is a method of treating waste which is pyrolyzed and carbonized in the tunnel heating furnace 4 and supplied to the high temperature reactor 5.

FIG. 2 shows an example of a waste treatment facility using a multi-stage floor drying furnace as the drying device 60. In the waste treatment facility shown in FIG. 2, after drying waste having a large amount of water and a low calorific value, the waste is appropriately mixed with a waste having a high calorific value at the waste inlet 20A, and then compressed by the compression device 1. After being formed into a compression molded product, it is supplied into the tunnel heating furnace 4.

As a result, according to the third invention, as in the first, second, and fifth inventions described above, the problems of the prior art described above can be solved, and the heat generation amount is low. Since waste and waste with a high calorific value can be treated simultaneously and in parallel, waste with a low calorific value can be melted and gasified using the combustion heat of the waste with a high calorific value. In addition, it has become possible to reduce the energy required for processing waste having a low calorific value.

Further, the volumetric efficiency of the waste treatment facility has been improved, and waste can be treated with a compact facility. The water vapor in the gas generated in the drying device 60 can be separated by cooling and condensing in the cooler 30, and the condensed water 31 is used for cooling and / or washing the generated gas discharged from the high-temperature reactor 5 which is a later step. Is preferably used.

The gas from which the water vapor has been separated is fed into the tunnel heating furnace 4 and the high-temperature reactor 5 of the waste treatment facility.
It is preferable to blow into any one or both of them. Next, FIG. 3 is a side view showing another example of the waste treatment equipment according to the third invention. In FIG. 3, 1A,
1B is a compression device that pressurizes and compresses waste batchwise (: batch), 2A and 2B are compression cylinders, 3A and 3B are compression support plates, and 4A and 4B are compressed waste (: compression molding , Heating, drying, pyrolysis, carbonization, tunnel type heating furnace,
20A, 20B, 20C waste inlet, 21A, 21B, 21C waste inlet of the lid, 33B the gas withdrawal outlet, f ₁₀ indicates the direction of movement of the waste, Figure 1 and other designations mentioned above, The same contents as those in FIGS. 2 and 5 are shown.

The waste treatment equipment shown in FIG. 3 is an example in which a tunnel type heating furnace 4B is used as a pre-drying device for waste having a large amount of moisture and a low calorific value. After the compression molded product is dried, it is appropriately mixed with waste having a high calorific value at the waste inlet 20A, and then compressed by the compressor 1A to form a compression molded product, which is then supplied into the tunnel heating furnace 4A.

As a result, the above-mentioned problems of the prior art can be solved, and a waste having a low calorific value and a waste having a high calorific value can be treated simultaneously in parallel. In addition, the waste heat having a high calorific value can be melted and gasified by using the heat of combustion, and the energy required for processing the waste having a low calorific value can be reduced.

Further, the volumetric efficiency of the waste treatment facility has been improved, and the waste can be treated with a compact facility. [Fourth Invention] FIG. 4 is a side view showing an example of a waste treatment facility according to the fourth invention and a preferred embodiment of the fourth invention.

In FIG. 4, 20A and 20B are waste inlets, 80 is a drying device, 81 is waste, 82 is a device for supplying dried waste to the high-temperature reactor 5, 83 is a screw feeder,
Reference numerals 84a and 84b denote valves, and other reference numerals refer to FIGS.
3 and 5 show the same contents. A fourth aspect of the present invention provides the above-described object of the present invention, that is, in a waste treatment facility for melting and gasifying various wastes, to stably treat the wastes without reducing the treatment amount. FIG. 4
As shown in (1), this is a method of treating a waste having a large amount of moisture and a low calorific value, which is dried by a drying device 80 and then directly supplied to the high temperature reactor 5.

FIG. 4 shows an example of a waste treatment facility using a heating drum type drying device as the drying device 80. 4th
Is a method in which waste having a large amount of water and a low calorific value is dried, and then directly charged into the high-temperature reactor 5 to be melted and gasified. Since the objects can be processed at the same time, it is possible to melt and gasify waste having a low calorific value by using the combustion heat of the waste having a high calorific value.

As a result, according to the fourth aspect of the present invention, it has become possible to solve the above-mentioned problems and to reduce the required energy in the waste disposal equipment.

[0063]

EXAMPLES The present invention will be described below more specifically based on examples. [Examples 1 and 2] (First invention,
2nd invention, 5th invention), [Comparative example] A waste treatment test was performed using the waste treatment facility of the present invention shown in FIG. 1 having a waste treatment amount of 150 t / d scale.

Hereinafter, in Examples 1, 2 and Comparative Examples,
[I.] Waste treatment equipment and methods, [II.] Disposal
It is described in the order of the waste disposal test results. [I.] Waste treatment equipment and waste treatment method: shown in FIG.
Inlet 4 of tunnel heating furnace 4 in waste treatment facility_E
The cross-sectional shape of the inner wall is a rectangle with a width of 2000mm and a height of 500mm
Yes, entrance 4 of tunnel heating furnace 4 _EPressure from above
The compression support board 3 is configured to be inserted.

After the waste is dropped into the compression device 1 from the waste inlet 20 with the compression support board 3 inserted, the compression cylinder 2 is pushed with a load of 1000 t / m ² , and the waste inlet 20 is pressed.
The lower waste is compression molded. As a result, the waste is compressed to a volume of about 1/10 between the compression cylinder 2 and the compression support plate 3 to obtain a compression molded product 10a.

[0066] cross-sectional shape of the compression molded product 10a resulting cross-sectional shape having the same shape of the inlet 4 _E inner wall of a tunnel type heating furnace 4, the same dimensions, the inlet 4 _E is sealed by compression molding thereof. After compression, the compression support plate 3 is pulled out upward, and the compression cylinder 2 is further pushed in, whereby the compression molded product 10a obtained above is pushed into the tunnel type heating furnace 4.

By pushing a new compression molded product from the entrance 4 _E of the tunnel type heating furnace 4, the compression molded products already loaded in the tunnel type heating furnace are sequentially pushed into the tunnel type heating furnace 4 and flow therethrough. Move while sliding. In this case, the cross section of the compression molded product and the entrance 4 _E of the tunnel heating furnace 4
Has the same shape and the same dimensions as the inner wall cross section, the outer periphery of the compression-molded product and the inner wall of the tunnel heating furnace are kept in close contact with each other when pushed into the tunnel heating furnace.

The tunnel heating furnace 4 has a length of 20 m,
The other end of the tunnel heating furnace is connected to a high temperature reactor 5. The inside of the tunnel heating furnace 4 is heated by a gas heater from the outside, and the inner wall surface is heated to about 600 ° C. or more. As a result, the above-mentioned compression-molded product is dried while moving in a tunnel-type heating furnace, and partially thermally decomposed, and finally, carbonized products 11 including carbides such as organic substances, minerals, metals and the like. It becomes _n .

The volume of the obtained carbonized product 11 _n is smaller than that of the compression-molded product 10 a at the entrance 4 _E of the tunnel heating furnace, and moves while receiving pressure from the entrance 4 _E side of the tunnel heating furnace. Therefore, as shown in FIG. 1, a gap is formed at the upper portion on the exit side of the tunnel heating furnace, and at the extrusion port 40 of the carbonization product of the tunnel heating furnace, the carbonized product 11 _n is reacted at a high temperature. It is pushed into the vessel 5.

On the other hand, steam and other gases are generated in the tunnel heating furnace by drying and thermal decomposition of the compression molded product. In the waste treatment equipment shown in FIG. 1, the upper side wall of the drying region 4a of the compression-molded product 3~7m from the inlet 4 _E of the tunnel type heating furnace 4, i.e. _{l 1 = (3/20) · l~} (7 / 20)
The upper side wall 1 is provided with 24 50 mmφ gas outlets 33 (4 rows × 6 stages), and the gas in the tunnel type heating furnace 4 is sucked and extracted by the exhaust fan 32.

The gas extracted by suction is passed through a cooler (: condenser) 30 to condense, separate and remove water vapor in the gas. Further, in the waste treatment equipment shown in FIG. 1, a position 5 m upstream of the carbonized product of the tunnel type heating furnace 4 from the extruding port 40 of the tunnel type heating furnace 4 and the position of the tunnel type heating furnace 4 of the high temperature reactor 5. A gas injection port is provided immediately above the connection portion of the gas turbine. The gas from which water vapor is condensed and removed passes through the tunnel type heating furnace 4 through the gas injection port.
And / or into the high-temperature reactor 5 again.

If the gas to be withdrawn and extracted contains no harmful components and is composed of only water, it can be released to the atmosphere. Carbonized products extruded from the tunnel-type heating furnace 4 are deposited in the high-temperature reactor 5, and the deposits are supplied to an oxygen-containing gas injection port provided on the outer periphery of a lower portion of the high-temperature reactor 5.
Combustion and thermal decomposition by oxygen-containing gas (pure oxygen) blown from 13
The temperature is maintained at about 1200 ° C. to 1350 ° C., and the vicinity of the upper gas outlet 52 is also maintained at 1000 ° C. or more.

The residue after combustion and thermal decomposition (incombustibles) accumulates in the lower part of the furnace, but the oxygen-containing gas provided at the lower level of the furnace and the oxygen-containing gas (: It is melted by the combustion heat of air and propane gas. The molten residue is stored in the hearth as molten metal and molten slag, and is discharged from the molten material discharge port 14H.

Tunnel type heating furnace 4 for supplying carbonized product
The distance between the height of the lower end of the outlet of the carbonized product (the inlet of the carbonized product into the high-temperature reactor 5) 40 and the height of the gas outlet 52 at the connecting portion between the gas and the high-temperature reactor 5 is 14 m. Yes, gas generated by heating, burning and pyrolysis of carbonized products,
The dust is sufficiently burned and pyrolyzed. According to the waste treatment equipment shown in FIG. 1, the amount of C + H ₂ in the high-temperature reactor 5 is reduced by reducing the moisture in the gas fed into the high-temperature reactor 5.
The temperature drop in the high-temperature reactor 5 due to an endothermic reaction caused by moisture such as the reaction of O → CO + H ₂ is suppressed, and the amount of oxygen blown is reduced by further reducing the amount of crude synthesis gas to reduce CO _2.
It is possible to suppress the generation of waste, various waste,
Processing can be performed stably without reducing the throughput.

[II.] Results of waste treatment test:% in the composition of each waste shown in the following Examples and Comparative Examples represents% by weight. (Example 1) Using the waste treatment equipment of the present invention shown in FIG. 1, waste containing organic sludge as a main component was treated.

The organic sludge has a combustible content of 30%, an ash content of 10%,
Moisture: 60%, lower calorific value: 1000 kcal / kg. The above-mentioned organic sludge was introduced from the waste inlet 20 at a supply speed of 6 t / h, and treated. In the present embodiment, the gas in the tunnel-type heating furnace 4 is extracted from the gas extraction port 33 provided on the upper side wall of the drying region 4a of the compression-molded product of the tunnel-type heating furnace 4, and the extracted gas is cooled by a cooler (: Condenser) 30
, And water vapor was condensed and removed.

The amount of gas suctioned from the tunnel heating furnace 4 was 4000 Nm ³ / h on average. As a result of the above-mentioned test, 3 t / h of water can be separated in the cooler 30, whereby the amount of water in the organic sludge fed into the high-temperature reactor 5 is reduced from 60% to about 10%. It is estimated that it was completed. The temperature of the generated gas (: exhaust gas) at the gas outlet 52 at the upper part of the high-temperature reactor 5 fluctuates at 1200 ° C or higher, the methane concentration in the generated gas is 0.2 vol% or less, and the oxygen at the upper part of the high-temperature reactor 5 There was no need to blow gas.

The lower heating value of the generated gas is about 2000 kcal.
/ Nm ³ remained stable and could be used stably as fuel gas in gas engines. The amount of gas extracted from the tunnel heating furnace 4 to condense and remove water vapor is small in quantity, and the gas above the top of the high temperature reactor 5 is returned to the tunnel heating furnace 4 or the high temperature reactor 5 or released to the atmosphere. There was no change in the generated gas temperature, the methane concentration in the generated gas, or the like at the gas discharge port 52 of FIG. (Comparative Example) Organic sludge is the main component in the same manner as in Example 1 except that the waste treatment facility shown in FIG. 1 was used and gas was not extracted from the inside of the tunnel heating furnace 4. Waste treatment was performed.

The organic sludge has a combustible content of 30%, an ash content of 10%,
Moisture: 60%, lower calorific value: 1000 kcal / kg. The above-mentioned organic sludge was introduced from the waste inlet 20 at a supply speed of 6 t / h, and treated. As a result of the above test, the generated gas temperature at the gas outlet 52 at the top of the high-temperature reactor 5 is:
1000 ℃ or less, the methane concentration in the generated gas is 1.5 ~ 2
vol%.

When the methane concentration in the generated gas exceeds 1 vol%, a large amount of other organic components are also present in the generated gas. As a result, the generated gas is cooled in the quenching device 50 at the outlet of the high temperature reactor 5. Tar-like substances came to be mixed in the water, and the circulation system of the gas cooling water was blocked. For this reason, it was necessary to increase the amount of oxygen blown from the oxygen blowing port 16 in the upper part of the high-temperature reactor 5 to keep the generated gas temperature in the gas outlet 52 in the upper part of the high-temperature reactor 5 at 1000 ° C.

As a result, the content of CO ₂ increases due to the combustion of the combustible components in the gas, the calorific value of the generated gas decreases,
The lower calorific value dropped to 800 kcal / Nm ³ . Example 2 Inorganic sludge and combustible waste such as paper waste, wood waste, fiber waste, etc. were treated together using the same waste treatment equipment of the present invention shown in FIG.

The amount of inorganic sludge supplied to the waste inlet 20 is 3.
9 t / h, the supply amount of combustible waste was 2.1 t / h, and these were mixed and charged from the waste inlet 20 for treatment. The inorganic sludge has a combustible content of 0%, an ash content of 30%, a water content of 70%, and a lower calorific value of -400 kcal / kg. The combustible waste is a combustible content of 80%, an ash content of 10%, and a water content of: 10%, lower heating value: 4000
kcal / kg.

The weight of the mixed waste is 30% inflammable, 20% ash, 50% moisture, and 1100 low calorific value on a weighted average.
kcal / kg. The above-mentioned mixed waste was treated while extracting gas from the inside of the tunnel heating furnace 4 in the same manner as in Example 1. As a result of the test described above, 2.7 t / h of water can be separated in the cooler 30, whereby the amount of water in the waste fed into the high-temperature reactor 5 is reduced to 50 tons.
It is presumed that it was able to be reduced from% to about 5%.

The temperature of the generated gas at the gas outlet 52 at the upper part of the high temperature reactor 5 fluctuates around 1100 ° C., the methane concentration in the generated gas is 0.2 vol% or less, and the oxygen gas at the upper part of the high temperature reactor 5 There was no need to blow. The lower calorific value of the generated gas remained stable at about 2000 kcal / Nm ³ and could be used stably as a fuel gas in gas engines. [Embodiments 3 and 4] (Third invention) (Embodiment 3) Using a waste treatment facility provided with the multi-stage floor drying furnace type drying apparatus according to the present invention shown in FIG. 2 described above. And a waste disposal test.

The drying device 60 of the multi-stage floor drying furnace system is provided separately from the compression device 1, the tunnel heating furnace 4, and the high-temperature reactor 5, and the waste after drying is transported by the belt conveyor 70. Into the waste inlet 20A. Further, the internal gas of the drying device 60 of the multi-stage floor drying furnace system was extracted by the exhaust fan 32, the water was condensed and removed by the cooler 30, and then supplied into the tunnel heating furnace 4 and the high-temperature reactor 5.

In this embodiment, inorganic sludge, which is a waste containing a large amount of water and having a low calorific value, and combustible waste such as paper waste, wood waste, and fiber waste are treated together. That is, after the inorganic sludge is dried by the drying device 60 of the multi-stage floor drying furnace system, the sludge is supplied to the waste inlet 20A and, in parallel,
Combustible waste was supplied directly to the waste inlet 20A.

The amount of inorganic sludge supplied to the waste inlet 20B is
3.9 t / h, the amount of combustible waste supplied to the waste inlet 20A is
2.1t / h. Inorganic sludge is combustible: 0%, ash: 30
%, Moisture: 70%, lower calorific value: -400kcal / kg, flammable waste: flammable: 80%, ash: 10%, moisture: 10
%, Lower calorific value: 4000 kcal / kg.

As a result of the above test, the temperature of the generated gas at the gas outlet 52 at the upper part of the high-temperature reactor 5 fluctuated around 1100 ° C., the methane concentration in the generated gas was 0.5 vol% or less, It was not necessary to perform oxygen gas blowing at the top of No. 5. The lower heating value of the generated gas is about 2000kcal
/ Nm ³ remained stable and could be used stably as fuel gas in gas engines. (Example 4) A waste treatment test was conducted using a waste treatment facility provided with the drying apparatus of the tunnel heating furnace type according to the present invention shown in FIG. 3 described above.

The length of the tunnel type heating furnace 4B, which is the preliminary drying apparatus shown in FIG. 3, is 8 m. In the waste treatment equipment shown in FIG. 3, waste having a large water content and a low calorific value is supplied to the waste inlet 20B. After the waste supplied to the waste inlet 20B is compressed by the compression device 1B, the compression molded product 10a is pushed into the tunnel heating furnace 4B which is heated from the outside, and is transferred in the tunnel heating furnace 4B. In the process of heating, drying is performed.

The exit of the tunnel type heating furnace 4B is disposed above the waste input port 20A, and the dried product extruded from the tunnel type heating furnace 4B falls to the waste input port 20A. At the outlet of the tunnel heating furnace 4B, gas outlets 33B are provided at opposing positions, and the steam-containing gas generated inside the tunnel heating furnace 4B is sucked and removed by the exhaust fan 32.

The processing of the extracted gas is the same as in Examples 1 to 3 described above. In the waste treatment equipment shown in FIG. 3, since the waste inlet 20c is provided, the waste inlet 20c is provided in parallel with the waste having a low calorific value after drying.
A, it is possible to supply waste with a high calorific value, these mixtures are compressed by a compression device 1A, and the obtained compression molded product is pushed into a tunnel-type heating furnace 4A to be subjected to thermal decomposition,
The carbonized product obtained after carbonization is melted and gasified by the high temperature reactor 5.

In the waste treatment equipment shown in FIG. 3, since the waste having a low calorific value is dried when it is supplied to the waste inlet 20A, the internal gas is extracted from the tunnel heating furnace 4A. Not required. In this embodiment, inorganic sludge and paper waste, which are wastes containing a large amount of water and having a low calorific value,
Combustible waste such as wood chips and fiber chips were treated together.

That is, the inorganic sludge is supplied to the tunnel heating furnace 4B.
After drying, the combustible waste is supplied to the waste input port 20A and, at the same time, is supplied to the waste input port 20C.
Was supplied to the waste inlet 20A via the Waste input
The supply of inorganic sludge to 20B is 3.9t / h, waste input 20C
The supply of combustible waste to the plant was 2.1 t / h.

The inorganic sludge has a combustible content of 0%, an ash content of 30%,
Moisture: 70%, lower calorific value: -400 kcal / kg, and combustible waste: flammable: 80%, ash: 10%, moisture: 10%, lower calorific value: 4000 kcal / kg. As a result of the above test, the temperature of the generated gas at the gas outlet 52 at the upper part of the high-temperature reactor 5 fluctuated around 1100 ° C., the methane concentration in the generated gas was 0.5 vol% or less, It was not necessary to blow oxygen gas.

Further, the lower heating value of the generated gas is about 2000 kcal.
/ Nm ³ remained stable and could be used stably as fuel gas in gas engines. Example 5 (Fourth Invention) A waste treatment test was performed using the waste treatment facility according to the present invention shown in FIG.

The heating drum type drying device 80 is provided separately from the compression device 1, the tunnel type heating furnace 4, and the high temperature reactor 5, and the waste after drying is directly in the high temperature reactor 5. Supplied to The internal gas of the drying device 80 is
The water was condensed and removed by the cooler 30, and then supplied into the high-temperature reactor 5.

In this example, inorganic sludge, which is a waste containing a large amount of water and having a low calorific value, and combustible waste such as paper waste, wood waste, and fiber waste were treated together. That is, after the inorganic sludge is dried by the drying device 80, it is directly supplied into the high-temperature reactor 5 by the screw feeder 83, and at the same time, combustible waste is supplied to the waste inlet 20A and compressed. Apparatus 1, compressed by tunnel heating furnace 4,
Pyrolysis and carbonization were performed, and the obtained carbonized product was supplied into the high-temperature reactor 5.

The amount of inorganic sludge supplied to the waste inlet 20B is
3.9 t / h, the amount of combustible waste supplied to the waste inlet 20A is
2.1t / h. Inorganic sludge is combustible: 0%, ash: 30
%, Moisture: 70%, lower calorific value: -400kcal / kg, flammable waste: flammable: 80%, ash: 10%, moisture: 10
%, Lower calorific value: 4000 kcal / kg.

As a result of the above test, the dried product of the inorganic sludge was directly supplied into the high-temperature reactor 5, and the temperature of the generated gas at the gas outlet 52 at the upper part of the high-temperature reactor 5 was as shown in Examples 2 to 4. Although it decreased in comparison, the temperature was kept at 1200 ° C. by adjusting the oxygen blowing amount. The methane concentration in the generated gas is
It was less than 0.2 vol%. The lower heating value of the generated gas is about 19
It was stable at 00 kcal / Nm ³ and could be used stably as a fuel gas in gas engines and the like.

[0100]

According to the present invention, the following excellent effects (1) to (5) can be obtained. (1) In a waste treatment facility that melts and gasifies various wastes, wastes that were conventionally difficult to treat, such as wastes with a large amount of water and a low calorific value, can be treated without reducing the treatment amount. It has become possible to process stably and reliably.

(2) The calorific value of the generated gas obtained in the waste treatment facility is high, and the calorific value is stable over time, and it can be effectively used as a fuel such as a fuel for a gas engine for power generation. (3) Waste with a low calorific value and waste with a high calorific value can be simultaneously supplied to the waste treatment facility for treatment. Melting and gasification using the combustion heat of
It has become possible to reduce the energy required for the treatment of waste with a low calorific value.

(4) The organic components in the generated gas can be reduced, and as a result, the following effects are obtained. : Maintenance and management of the generated gas cooling device and the gas purification device became easy, and the service life of the generated gas cooling device and the gas purification device could be extended. : The blowing of oxygen into the upper part of the high-temperature reactor became unnecessary, and the problem of the decrease in the calorific value of the generated gas due to the blowing of oxygen in the prior art was solved.

(5) By sending the gas from which water has been removed to the high-temperature reactor, deodorization treatment is not required. (6) By using the condensed water obtained in the water removal for cooling and cleaning the generated gas, the amount of fresh water used can be reduced and the water treatment equipment can be downsized.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a waste treatment facility of the present invention.

FIG. 2 is a side view showing an example of a waste treatment facility according to the present invention.

FIG. 3 is a side view showing an example of a waste treatment facility according to the present invention.

FIG. 4 is a side view showing an example of a waste treatment facility according to the present invention.

FIG. 5 is a side view showing a conventional waste treatment facility.

[Explanation of symbols]

1, 1A, 1B Compression device that pressurizes and compresses waste in batches 2, 2, 2A, 2B Cylinder for compression 3, 3A, 3B Compression support plate 4, 4A, 4B Compressed waste (: compression molded product) Tunnel type heating furnace for drying, pyrolysis and carbonization (heating furnace) 4a Drying area for compression molded products 4b Thermal decomposition and carbonizing area for compression molded products 4 _E Entrance of tunnel type heating furnace 5 High temperature reactor 10a 10i Compression molded product 11 _i , 11 _n Carbonized compression molded product (: carbonized product) 12 Mixture of carbonized product and combustion residue 13 Oxygen-containing gas inlet 14 Melt 14H Melt outlet 15 Oxygen-containing gas and combustible Gas inlet 20, 20A, 20B, 20C Waste inlet 21 21A, 21B, 21C Waste inlet lid 30 Cooler for gas cooling 31 Condensed water 32 Exhaust air 33, 33B Gas outlet 34, 35 , 36, 38 Piping 37 Valve 39 Gas feeder 40 Tunnel heating furnace carbonized product extrusion port ( 50 Charging product gas (exhaust gas) discharged from high-temperature reactor 51 Gas purification device 52 High-temperature reactor gas outlet 53 Purified gas 60, 80 Drying device 61 , 81 Waste 62 Stirrer 70 Belt conveyor 82 Device for supplying dried waste to high-temperature reactor 83 Screw feeder 84a, 84b Valve f ₁ Moving direction of compression molded product f ₂ Moving direction of carbonized product f ₃ Tunnel Flow direction of pyrolysis gas generated in the heating furnace f ₄ Direction of blowing oxygen-containing gas into the high-temperature reactor f ₅ Moving direction of the compression cylinder f ₆ Moving direction of the compression support plate f _{7 At the} waste inlet tunnel from the inlet 4 _E in the moving direction l tunnel furnace in the movement direction f ₁₁ after drying waste blowing direction f ₁₀ waste oxygen-containing gas and combustible gas to the lid of the direction of rotation f ₈ hot reactor Extrusion port 40 for carbonized products in a heating furnace Extrusion port 40 direction of distances of the distance l ₁ tunnel type heating furnace inlet 4 _E carbonization product of a tunnel type heating furnace starting from the up

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁶ Identification code FI F23G 5/02 ZAB F23G 5/14 ZABD B09B 3/00 ZAB 5/14 ZAB 302G 302F 303K (72) Inventor Noboru Yaskawa Chiyoda, Tokyo Kawasaki Steel Co., Ltd. 2-3-2, Uchisaiwai-cho Kawasaki Steel Corporation (72) Inventor Taro Kusakabe 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba

Claims (6)

[Claims] 1. A step of compressing waste, a step of heating the obtained compression-molded product, and extracting a gas generated by drying while drying, pyrolyzing and carbonizing, and a step of heating the obtained carbonized product. And a step of generating a melt and a fuel gas. 2. The waste disposal method according to claim 1, wherein said compression-molded product is dried to extract gas generated therefrom, water in said gas is removed, and the gas from which water has been removed is dried and heated. A method for treating wastes, comprising: feeding to one or both of a step of decomposing and carbonizing or a step of heating a carbonized product to generate a melt and a fuel gas. 3. A step of preliminarily drying the waste having a low calorific value to remove a part or all of the water and compressing the waste together with the waste having a high calorific value, and heating the compression molded product obtained in the step. And a step of drying, pyrolyzing, and carbonizing, and a step of heating the carbonized product obtained in the step to generate a melt and a fuel gas. 4. A step of compressing the waste, a step of heating the obtained compression molded product, and extracting a gas generated by drying while drying, pyrolyzing and carbonizing, and a carbonization product obtained in the step. Is heated to generate a melt and a fuel gas, and the waste having a low calorific value is dried in advance to remove a part or all of the moisture, and then the melt and the fuel gas are directly heated. A waste treatment method, wherein the waste is supplied to a producing step. 5. The method according to claim 2, wherein the removed water is used as cooling water and / or cleaning water for generated gas discharged from the step of generating the melt and the fuel gas. Waste treatment method according to 1. 6. A compression device (1) for compressing waste, a heating furnace (4) for drying, pyrolyzing and carbonizing the compression molded product obtained by the compression device (1); ) The high-temperature reactor (5) that heats the carbonized product obtained in
A gas outlet (33) for extracting gas generated by drying from the heating furnace (4), a cooler (30) for cooling the extracted gas to condense and remove moisture, and Gas extraction and feeding device to feed either or both of the heated furnace (4) and / or high-temperature reactor (5)
Waste treatment equipment characterized by having (39).