JPH09329313A - Furnace operation method of waste gasification and melting furnace - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To burn a residue after pyrolysis mainly in the combustion melting zone 1c while melting the waste, and to melt the combustion residue to discharge it outside the furnace. (EN) A means for reducing the size of a waste melting treatment apparatus equipped with a waste gasification and melting furnace 1 and greatly reducing fuel resource consumption. SOLUTION: The waste gasification melting in which the residue after thermal decomposition is burned mainly in the combustion melting zone 1c, and the combustion residue is melted and discharged to the outside of the furnace, while sequentially moving the waste downward. The waste is divided into the furnace 1, one of the wastes is charged from the waste charging means 3, and the other waste is crushed and then compressed and solidified by heating to solidify the waste fuel (RDF). After being formed, it is charged from the solidified waste charging means 4 provided separately from the waste charging means 3 and burned in the combustion melting zone 1c together with the one waste.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating a waste gasification and melting furnace, and more particularly to a waste in which gasification and melting waste is disposed above a vertical waste gasification and melting furnace. Charged from the charging means, while sequentially moving downward, mainly in the drying zone, the introduced waste is dried by the heat of the exhaust gas from the lower thermal decomposition zone, mainly in the thermal decomposition zone, The heat of the combustion gas from the lower combustion melt zone thermally decomposes the dried waste,
The present invention mainly relates to a furnace operation method for a waste gasification and melting furnace in which a residue after the thermal decomposition is burned in the combustion melting zone, and the combustion residue is melted and discharged outside the furnace.

[0002]

2. Description of the Related Art Conventionally, in a waste gasification and melting furnace,
The heat value of combustion varies greatly depending on the property (waste quality) of the charged waste, which makes it difficult to maintain combustion in the combustion melting zone. The thermal decomposition of the waste after drying in the decomposition zone may be insufficient, resulting in the shutdown of the gasification and melting furnace operation. To cope with this, an auxiliary fuel is supplied to the combustion melting zone. Further, when the volume of the combustion melting zone is large, thermal diffusion is large, and therefore, in order to sufficiently maintain the heat supply to the pyrolysis zone located above it, an amount of auxiliary fuel commensurate with the volume is required. Therefore, from the viewpoint of saving fuel resources, a furnace body shaped to reduce the flat cross-sectional area of the furnace bottom in order to reduce the combustion area of the combustion melting zone and to reduce the pool surface area of the molten slag. Has been adopted. FIG. 4 schematically shows one example thereof, in which coke K is introduced as an auxiliary fuel, and the additional combustion heat of the coke K stably performs the waste gasification and melting. In this example, the heat of combustion of coke K is used as an auxiliary heat source. However, from the viewpoint of resource consumption, it is not preferable to consume useful fuel resources for waste treatment, and fuel saving is required. The furnace zone in which the decomposition zone 1b and the combustion melting zone 1c are narrowed down is adopted. In other words, the waste gasification and melting furnace 1 is formed in a cylindrical shape, and is formed in a conical shape with a gradually decreasing radius at the lower side, and the waste charging means 3 is provided at the center of the upper end of the furnace top 1d. Coke charging means 9 around
, Respectively. The waste charging means 3 has an extending portion 3c below, and the upper portion of the waste gasification and melting furnace 1 is formed as a double furnace body. A dry zone 1a is formed below the extending portion 3c, and a thermal decomposition zone 1b and a combustion melting zone 1c are sequentially formed below the dry zone 1a. A tuyere 5 for blowing oxygen-enriched air as a combustion gas into the combustion and melting zone 1c is provided at a lower end portion of the waste gasification and melting furnace 1 on a side of the combustion and melting zone 1c. A slag discharge means 8 having a slag discharge port is provided at the bottom of the combustion melting zone 1c. The operation of the above-mentioned waste gasification and melting furnace is performed, for example, as follows. Coke K is charged from the coke charging means 9 in advance, and raw refuse W as a waste is charged from the waste charging means 3 into the furnace in which the combustion melting zone 1c is ignited. The charged garbage W descends from the extending portion 3c, and in the drying zone 1a near the lower end thereof, the thermal decomposition residue of the garbage W burns with the coke K in the combustion melting zone 1c. The generated combustion gas rises through the thermal decomposition zone 1b at about 450 ° C.
The pyrolysis gas composed of hydrocarbons, carbon monoxide, etc., which has been dried by the exhaust gas before and after, further descends, reaches the thermal decomposition zone 1b, and is thermally decomposed by the combustion exhaust gas from the combustion melting zone 1c, is generated as described above. Garbage W in dry zone 1a
After being dried, it is supplied to the gas utilization facility via the flue 2. Oxygen-enriched air is supplied to the combustion melting zone 1c from the tuyere 5 to burn the coke K and its temperature is maintained at about 1500 ° C. Here, the ash content such as the thermal decomposition residue of the raw waste W and the combustion residue of the coke K is melted by the combustion heat of the combustible components of the thermal decomposition residue and the combustion residue, and the molten slag flows down to the slag. It is discharged through the discharge port through the slag discharging means 8.

[0003]

In the furnace of the above-mentioned conventional waste melting treatment apparatus, the combustion heat of the auxiliary fuel (coke) is used as a heat source for maintaining the combustion melting temperature in the combustion melting zone 1c. Since it is used, there is a problem that consumption of additional useful fuel resources for waste disposal and running cost increase. However, it is not preferable to consume the useful fuel resources for waste treatment, and fuel saving is required. Therefore, in order to reduce the area of the high temperature portion, as described above, the furnace shape with a narrowed bottom is used. There is no choice but to adopt it, and in the case of such a furnace shape with a narrowed bottom, there is a problem that it is necessary to avoid hanging of the charged materials.
In addition, unless the furnace wall is formed so as to be inclined downward so as to expand the inside of the furnace, there is a possibility that hanging will occur, and once the hanging occurs, the combustion melting zone 3c will not be charged. Since the space is not supplied from above, there is a problem that the temperature of the melting portion is lowered and it becomes difficult to maintain the furnace.
Therefore, an object of the present invention is to provide a method for operating a furnace for a waste melting treatment apparatus that solves the above-mentioned problems and that can significantly reduce fuel resource consumption.

[0004]

[Means for Solving the Problems]

[First Characteristic Configuration] The characteristic configuration of the method for operating a waste gasification and melting furnace of the present invention for the above purpose is, for example, explained with reference to FIG. While transferring, mainly in the combustion melting zone 1c, the residue after pyrolysis is burned, and the waste is divided into a waste gasification and melting furnace 1 which melts the combustion residue and discharges it outside the furnace,
One of the wastes is charged from the waste charging means 3, and the other waste is crushed and then compressed and heated and solidified to solidify the waste (the waste is crushed and heated and solidified to be a fuel. Yes, usually referred to as RDF for short), and the waste solidified fuel is charged from the waste charging means 3 or the solidified waste charging means 4 provided separately, and the one waste At the same time, it is at the point of burning in the combustion melting zone 1c (corresponding to claim 1). [Operation and Effect of First Characteristic Configuration] According to the first characteristic configuration, since the waste solidified fuel formed from the other waste is crushed and compressed and solidified by heating, it has high strength and high calorie solid content. Since it can be used as a fuel and has a combustion calorific value of 50 to 60% or more with respect to fossil fuel coke, combustible components remain up to the combustion melting zone, and high temperature in the combustion melting zone. It fully plays the role of maintenance. As described above, even if the waste solidified fuel is pyrolyzed in the pyrolysis zone in the furnace, the whole is difficult to decompose into pieces and maintains a massive shape, and is in a sufficiently preheated state. In the combustion melt zone,
As a result of consolidation and solidification in the combustion melting zone, the material is burned and exhibits a sufficient amount of heat generation. Therefore, by using two types of charging methods together for charging waste, it is possible to stably perform gasification and melting treatment on a charge consisting of only waste without using any other heating means. Further, as described above, the other waste is supplied in a reduced volume, resulting in an increase in the internal packing density of the furnace, which makes it possible to make the equipment of the waste gasification and melting furnace compact. As a result, it has become possible to provide a waste gasification and melting treatment means which does not require consumption of fuel resources in gasification and melting treatment of waste and which enables miniaturization of waste treatment equipment. [Second Characteristic Configuration and Operation and Effect] As a second characteristic configuration of the method for operating a waste gasification and melting furnace of the present invention, the other waste after crushing in the first characteristic configuration is compressed with powdered lime. By solidifying by heating to form the waste solidified fuel (corresponding to claim 2), the waste solidified fuel is prevented from spoiling, and at the same time, is charged in the waste gasification and melting furnace. It is possible to react sulfur oxides and chlorine components generated when the organic matter in the waste is thermally decomposed with the powdered lime in a furnace, and fix them as a solid reaction product,
It becomes possible to reduce the content of sulfur oxides and chlorine content in the exhaust gas of the waste gasification and melting furnace, and to suppress the corrosion of the equipment in contact with the subsequent exhaust gas. Further, the basicity of the molten slag is adjusted by the powder lime, and the fluidity of the slag can be enhanced. Therefore, for example, referring to FIG. 1, when the waste heat boiler 22 is installed in the subsequent flue 2, it is imposed in order to avoid the corrosion caused by the sulfur oxides and the chlorine content in the conventional exhaust gas. It is possible to ease the temperature limitation that has been used, and it is possible to raise the steam temperature of the waste heat boiler 22. Therefore, for example, in a waste treatment facility provided with a waste heat utilization facility such as an exhaust gas power generation facility, power generation efficiency is increased and power generation amount is increased. Further, the constituent material of the exhaust gas passage can be reduced in cost, and at the same time, the equipment can be downsized and the running cost thereof can be reduced. [Third Characteristic Configuration and Operation and Effect] Further, as the third characteristic configuration of the method for operating a waste gasification and melting furnace of the present invention,
To form the waste solidified fuel in the characteristic configuration or the second characteristic configuration, for example, as shown in FIG. 1 as an example of the embodiment, the waste gasification into the other waste after the crushing. For forming the waste solidified fuel, the waste solidified fuel is formed by using waste heat of exhaust gas as heat energy from the melting furnace 1 or electric power generated by utilizing waste heat of own facility production (corresponding to claim 3). It will be possible to process without the need for a separate fuel, and at the same time, it will be possible to self-sufficiently solidify the solid waste fuel in the facility. As a result, it becomes possible to provide a means capable of increasing the amount of waste treatment while reducing the size of the waste treatment equipment and stabilizing the operation at the same time.

In the above description of the means for solving the problems of the present invention, reference has been made to the drawings, and reference numerals have been used in the drawings to facilitate comparison with the drawings. It is not limited to the configuration of the attached drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the furnace operation of the waste melting processing apparatus of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the waste melting treatment apparatus includes a vertical type waste gasification and melting furnace 1, a flue 2 through which the generated gas in the waste gasification and melting furnace 1 is discharged, and the flue 2. The boiler 22 provided for burning the generated gas, the waste solidification device 6 for solidifying the waste by utilizing the heat of the combustion gas from the combustion chamber 22a of the boiler 22, and the waste from the boiler 22 A bag filter 23 that removes dust from the gas, a power generation device 25 that generates electric power from the steam generated by the boiler 22, and the like are provided.

In the waste gasification and melting furnace 1, a waste charging means 3 for receiving raw garbage W collected as waste, and a combustion and gasification of the received waste W are maintained. , Waste solidified fuel (RD)
F) and solidified waste charging means 4, and further provided with tuyere 5 for supplying oxygen or oxygen-enriched gas, and blowing oxygen or oxygen-enriched gas into the furnace The wastes are gasified and melted. The waste charging means 3 is provided in the lower part of the waste hopper 3a, which is provided above the waste gasification and melting furnace 1 and the waste introduced from the waste hopper 3a into the furnace. And pusher 3b.

The waste gasification and melting furnace 1 is a vertical furnace having an enlarged shape in the lower part, and three processing zones, that is, a drying zone 1a, a thermal decomposition zone 1b, and a combustion melting zone 1c, are sequentially formed from top to bottom. The waste introduced from the waste hopper 3a is dried in the drying zone 1a, and further descends to thermally decompose the organic matter contained in the waste in the thermal decomposition zone 1b, and the residue after gasification is removed. The gas generated in the combustion melting zone 1c after being melted in the combustion melting zone 1c flows out from the thermal decomposition zone 1b to the flue 2 through the drying zone 1a. Further, the solidified waste charging means 4 is configured to use the solidified waste fuel (RD).
F) is provided on the furnace top 1d of the waste gasification and melting furnace 1 for receiving F), and further, on the furnace top 1d below the combustion support material hopper 4a, upper and lower dampers 4b, A lower damper 4c is provided, and the waste solidified fuel supplied from the combustion sustaining material hopper 4a is introduced into the furnace by operating the dampers 4b and 4c in two stages. The upper damper 4b and the lower damper 4c constantly shut off the gas flow to the inside of the furnace to prevent the generated gas in the furnace from jetting out through the combustion maintaining material hopper 4a. The lower part of the combustion melting zone 1c has a melting slag portion where the melting process is performed and the residue is melted. Further, a slag discharge port is provided on the side of the combustion melting zone 1c, and the molten slag is dripped into the water cooling tank 8 storing the cooling water from the slag discharge port and rapidly cooled to form a water granulated slag. It is taken out by a conveyor provided through the bottom of the water cooling tank 8. The tuyere 5 is
It is formed so as to be slightly downward from the middle of the combustion melting zone 1c, and the gas to be supplied is blown toward the pyrolysis residue of the combustion melting zone 1c. As a result, the gas supplied from the tuyere 5 burns the combustible material in the melting part, completely oxidizes the molten waste, and discharges it as slag containing no unburned components. Corrosive gases such as hydrogen chloride generated in the process of decomposing vinyl chloride contained in the waste in the thermal decomposition zone 1b are reacted and fixed in the furnace as described later, and part of the slag is slag. However, the part that was not subjected to the reaction in the furnace was neutralized with an alkaline agent such as lime powder supplied as a desulfurization salt material in the reaction chamber that also served as a flue after passing through the boiler 22. After reacting and fixing as salts such as calcium chloride, it is captured and removed by a bag filter following the reaction chamber.

The boiler 22 includes a water pipe 2 in a combustion chamber 22a.
2b, the waste gasification and melting furnace 1
The combustible gas of about 400 ° C. to 500 ° C. generated in 1) is added with combustion air through the flue 2 formed between the waste gasification and melting furnace 1 and the combustion chamber 22a to burn the combustion. The high temperature combustion gas supplied to the chamber 22a and generated in the combustion chamber 22a is partially sent to the waste solidification device 6 and the rest is brought into contact with the water pipe 22b and heat-exchanged and then attracted by an induction blower. After passing through the economizer 22c and the exhaust gas treatment device such as the bag filter 23, the chimney 24
It is exhausted from. The steam generated in the boiler 22 is
The power is stably supplied to a power generator 25 equipped with a steam turbine that drives a generator, and the power generated by the power generator 25 is used as power for operating a waste melting treatment facility.
The surplus power is supplied to the outside. The waste solidification device 6 is for solidifying the crushed waste by adding lime powder, and the solidified waste solidified here is the waste solidified fuel (RDF) described above. Combustion sustaining material hopper 4a
As shown in FIG. 3, the plunger 6 for compressing and solidifying the crushed waste with the end plate 6c made of a porous metal body having air permeability is used for charging from the end.
a and a hopper 6b for supplying the crushed waste thereof, and the end plate 6c is provided with a plurality of extrusion holes 7 for extruding the compressed crushed waste into chips. Furthermore, the body 6 can be heated to heat the jacket 6d.
The bag filter 23 is connected to a bypass from the flue on the downstream side.

Explaining in detail the furnace operation of the above-mentioned waste melting apparatus, in the furnace operating method of the present invention, the waste is supplied to the waste gasification and melting furnace 1 from two routes.
That is, the waste generated in each household and collected by the garbage collection vehicle is once put into the waste pit 20 and stored, and then supplied to the waste gasification and melting furnace 1, but stored in the waste pit 20. Most of the waste that has been collected is picked up by the garbage crane 21, and the waste hopper 3a is directly held.
From the waste pit 20 to a separately provided crusher, and the crushed waste is mixed with powdered quick lime or slaked lime as an alkaline agent and fed to the waste solidification device 6, The solidified solidified waste is fed from the combustion maintaining material hopper 4a as solidified waste fuel (RDF). The amount of the waste that is input from the dust hopper 3a is adjusted according to the combustion state in the furnace by the control of the pusher 3b, and the solid waste fuel that is input from the combustion maintaining material hopper 4a is A predetermined amount is put into the furnace by alternately opening and closing the upper and lower dampers 4b and 4c. The opening / closing operation of the upper and lower dampers 4b, 4c is also adjusted according to the combustion state in the furnace. The waste introduced from the dust hopper 3a is dried in the drying zone 1a maintained at about 400 ° C. to 500 ° C., and the solid injected as the waste solidified fuel introduced from the combustion sustaining material hopper 4a. Most of the organic matter contained in the waste in the thermal decomposition zone 1b descends together with the chemical waste and is thermally decomposed into hydrocarbons such as methane, hydrogen, combustible gases such as carbon monoxide and carbon dioxide, and after gasification. Is melted in the combustion melting zone 1c maintained at about 1500 ° C., and the generated combustion gas flows from the thermal decomposition zone 1b to the flue 2 through the drying zone 1a. The flue 2 is connected to the waste gasification and melting furnace 1 through an annular duct surrounding an exhaust gas section 1e having a plurality of exhaust ports provided in the furnace wall in the drying zone 1a in the circumferential direction. . By arranging the exhaust gas section 1e in this way,
Due to the ventilation resistance of the waste in the dry zone 1a, it is possible to prevent the waste scattered in the space above the dry zone 1a from being sucked into the flue 2 and to prevent the outside air from entering the flue 2. I am doing it. In the combustion melting zone 1c, combustible components in the residue after drying and thermal decomposition burn with the air or oxygen-enriched gas or oxygen supplied from the tuyere 5 formed on the side wall of the combustion melting zone 1c. Then, high temperature and high heat are generated, and the ash and the inorganic substance are melted by this heat, and at the same time, the heat generated at that time is used for the thermal decomposition treatment in the thermal decomposition zone 1b and the drying treatment in the drying zone 1a. However, as described above, depending on the quality of the input waste, the decomposition of the waste may proceed excessively above the melting furnace, and the combustible components in the residue may become insufficient, resulting in insufficient calorific value of combustion. But,
Solid waste fuel (RDF) is different from ordinary waste,
Since it is in the form of pseudo coal (lumpy) and remains relatively stable in the furnace until it reaches the combustion melting zone 1c, it can be used as a fuel in the combustion melting zone 1c. Therefore, the waste solidified fuel (RD) is discharged from the combustion maintaining material hopper 4a.
F) can be supplied to compensate for the shortage of the amount of heat generated by the combustion reaction for the thermal decomposition treatment and the drying treatment, and the thermal decomposition treatment can be stabilized. In other words, since the solidified waste is obtained by drying and solidifying the crushed waste, it has a large combustion calorific value, which is less than about 35 MJ / kg of coke, but reaches about 16 MJ / kg, which is a sufficient assistance. It can also serve as a fuel, and since the solidified waste is a solid fuel made into waste solidified fuel, its combustion is stable once it is ignited. Since it plays a role of maintaining the combustion state in 1c, it is not necessary to supply an additional auxiliary fuel for maintaining the combustion. Therefore, as described above, a part of the charging waste is charged as the solid waste fuel without using the fossil fuel as the auxiliary fuel, so that the combustion state is surely maintained. It is possible to maintain and stabilize the furnace. As described above, in the furnace operating method of the present invention, raw garbage and waste solidified fuel are mixed and gasified and melted. However, the waste solidified fuel is in operation of the waste treatment device. Therefore, the raw garbage collected can be entirely gasified and melted in the waste gasification and melting furnace 1 through the two paths by passing through the two paths. Furthermore, when compressing and solidifying the crushed waste, by mixing lime which also contributes as an alkaline material for desulfurization and dechlorination as a molten slag basicity adjusting agent, the waste gasification and melting furnace 1 About 500 ° C. to 800 ° C. in the thermal decomposition zone 1b
When heated to ℃, the waste is thermally decomposed to generate chlorine, sulfur oxide, etc. Here, lime powder is released from the solidified waste fuel (RDF) which is heated to the above temperature and thermally decomposed. It is possible to fix the sulfur content as gypsum and the like and the chlorine content as calcium chloride by contacting with the gas such as chlorine content and sulfur oxide in the pyrolysis gas. A part of the lime component that has reacted during this fixation is collected by the bag filter along with the upward flow of the exhaust gas, and the residue falls against the upward flow and is mixed in the slag. As a result, desulfurization chlorine of the combustion gas is also performed, and the contents of chlorine and sulfur components in the waste gas are reduced, so that it is possible to suppress corrosion of the water pipe 22c of the waste heat boiler 22, and the waste heat boiler 22 The temperature limitation in the above is relaxed, and it becomes possible to generate higher temperature and higher pressure steam in the waste heat boiler 22, and it is also possible to enhance the thermal efficiency of the waste melting treatment apparatus. In this way, by raising the generated steam temperature, not only can the device be made smaller, but the fuel resource consumption can be further reduced. That is, as described above with respect to the conventional waste melting treatment apparatus, conventionally, coke was introduced and burned, and the heat of combustion of this coke was used to perform waste gasification and melting. In addition, consuming useful fuel for waste treatment is not preferable in terms of cost, and fuel saving is required. In view of the above, in the present invention, since the amount of heat generated is maintained by burning the RDF-ized waste without using fossil fuel such as coke, there is no consumption of useful fuel, and the RDF is used. Wastes can be treated at the same time, there is no demand for fuel saving, there is no problem even if a large amount of RDF is used as solid fuel, and it also contributes to promotion of waste treatment. Further, if the pyrolysis zone 1b and the combustion melting zone 1c, which have been conventionally used to suppress the auxiliary fuel consumption, have a furnace shape with a constricted bottom, it is easy to cause the hanging of the charged materials. By adopting a shape that expands downward in the furnace body as described above, the possibility of hanging the charged materials on the shelf is eliminated, and at the same time, the RDF waste is installed for heat diffusion at the bottom of the furnace. Turn it on and deal with it by replenishing its calorific value, eliminating the risk of damage to the bottom of the furnace due to the occurrence of rack hanging and the unexpected solidification of slag at the bottom of the furnace,
It was possible to maintain good furnace operation. In the waste solidification device 6, crushed waste is solidified by adding lime. The solidified waste solidified here is the combustion maintenance material as waste solidified fuel (RDF). Waste that can be loaded from the hopper 4a and the crushed waste supplied from the hopper 6b is stored in the main body in the end plate 6c.
When compressed and solidified between and, the water in the waste is contained in the waste by being taken out from the ventilation hole in the front stage of the heating unit and then heated by the exhaust gas at about 600 ° C. supplied to the jacket 6d. The synthetic organic substance such as vinyl is melted to form a binder, which promotes solidification of the charged crushed waste. In this way, the crushed waste that has been heated and thus contributes to the melting and softening of the synthetic organic material and is ready for extrusion is extruded from the extrusion hole 7 to form RDF. As described above, waste heat is also used to convert waste into RDF, further contributing to resource saving.

Next, another embodiment of the present invention will be described. <1> In the above-described embodiment, an example of forming the waste solidified fuel (RDF) in the equipment has been shown, but the equipment for forming the waste solidified fuel (RDF) may be separately provided. Good. Further, it is not always necessary to use the waste heat from the waste gasification and melting furnace. <2> In the above-described embodiment, an example of mixing powdered quick lime with waste solidified fuel (RDF) has been shown, but the powdered quick lime is not essential, and only waste is crushed and solidified. May be The object of the present invention can be sufficiently achieved by simply converting raw garbage into RDF. In other words, the solid waste fuel has a much higher bulk density than garbage.
It greatly contributes to the improvement of equipment efficiency and, at the same time, enables the operation of the furnace without using fossil fuel. <3> The waste solidified fuel (RDF) may remove incombustibles when the wastes are crushed, but it is not always necessary to remove the incombustibles. This is because even if the non-combustible material is contained in the raw garbage W, the non-combustible material is slagged at the time of gasification and melting, so the non-combustible material powder may be slagged together. <4> In the above embodiment, an example of charging the solidified waste fuel from the solidified waste charging means 4 provided separately from the waste charging means 3 is shown. As shown in FIG. 2, the waste solidified fuel may be fed into the furnace together with the raw garbage from the dust hopper 3a. The waste solidified fuel is sorted and stored in the same garbage pit 20 as raw garbage, and is supplied from the waste hopper 3a to the waste charging means 3 at a required ratio using a common crane. Good. <5> The tuyere of the waste gasification and melting furnace may be two-stage or multi-stage, and if possible, air may be supplied from the upper tuyere instead of oxygen or oxygen-enriched gas.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an example of a waste treatment facility for explaining an embodiment of the present invention.

FIG. 2 is an explanatory view of a waste treatment facility showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an example of solidification of waste.

FIG. 4 is an explanatory view showing a specific example of conventional waste gasification and melting.

[Explanation of symbols]

 1 Waste Gasification and Melting Furnace 1a Drying Zone 1b Pyrolysis Zone 1c Combustion Melting Zone 3 Waste Charging Means 4 Solidified Waste Charging Means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location C10L 5/48 F23G 5/00 115Z F23G 5/00 ZAB 5/02 ZABC 115 ZABD 5/02 ZAB 5 / 033 ZABC 5/24 ZABB 5/033 ZAB 5/44 ZABB 5/24 ZAB 5/46 ZABA 5/44 ZAB B09B 3/00 ZAB 5/46 ZAB 302G F23J 15/00 303K F23J 15/00 J

Claims (3)

[Claims] 1. A waste gas to be gasified and melted is introduced from a waste charging means arranged at an upper part of a vertical type waste gasification and melting furnace, and is sequentially transferred downward, mainly in a dry zone. , The input waste is dried by the heat of the exhaust gas from the lower pyrolysis zone, and the waste after drying is heated mainly by the heat of the combustion gas from the lower combustion and melting zone in the pyrolysis zone. A method for operating a waste gasification and melting furnace, which decomposes and mainly burns the residue after the thermal decomposition in the combustion melting zone, melts the combustion residue and discharges it outside the furnace, wherein the waste is Splitting, one waste is charged from the waste charging means, and the other waste is crushed and then compressed and heated to solidify to form waste solidified fuel. Waste charging means or provided separately Was charged from formulated waste MonoSoIri means, wherein with one of the waste furnace operation method of waste gasification melting furnace for burning in the combustion melting zone. 2. The method for operating a waste gasification and melting furnace according to claim 1, wherein the other waste after the crushing is compressed and heated and solidified with powdered lime to form the waste solidified fuel. 3. The waste according to claim 1, wherein the waste solidified fuel is formed by applying thermal energy from the waste gasification and melting furnace to the other waste after the crushing. Operation method of gasification and melting furnace.