JP3463052B1 - Waste fuel and waste combustion method - Google Patents

Abstract

Abstract: [PROBLEMS] Waste fuel that sufficiently suppresses generation of harmful substances such as dioxins and cadmium at the time of incineration, and harmful substances such as dioxins and cadmium that can be used for existing facilities. Provided is a method for burning waste, in which generation of substances is sufficiently suppressed. SOLUTION: It contains flammable waste and barley stone,
The barley stone has calcium oxide (Ca
Waste fuel containing 3.0 to 3.50 mass% of O) and 1.70 to 2.50 mass% of ferrous oxide (FeO), and the presence of the barley stone A method for burning waste, comprising burning waste below.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel waste fuel using combustible waste as a raw material and a method for burning the waste. More specifically, it suppresses the generation of harmful substances, particularly dioxins. The present invention relates to a new waste fuel with a reduced generation amount and a waste combustion method.

[0002]

2. Description of the Related Art In recent years, the amount of waste generated in Japan has been increasing along with economic growth, and the quality of waste has been changing significantly with the diversification of lifestyles. Conventionally, incineration treatment has been used for the treatment of these wastes in addition to the use of landfill disposal and composting technology.

However, the above-mentioned incineration process has a problem that harmful substances such as cadmium generated during incineration and CO ₂ countermeasures are taken. In recent years, in particular, the generation of dioxins, which is a generic term for polychlorinated dibenzoparadioxin (PCDD) and polychlorinated dibenzofuran (PCDF), has become a problem, and its reduction has become a major issue.

Dioxins are produced by incomplete combustion of organic substances containing carbon and de novo reaction. The de novo reaction is a reaction in which copper, cobalt, etc., which act as a catalyst for de novo formation, are contained in unburned carbon particles (soot), so that dioxins are produced from a thin compound that is molecularly related to dioxins.

That is, in order to suppress the production of dioxin, it is effective to completely burn the waste. Conventionally, secondary combustion in which the combustion gas generated by burning the waste is completely burned is effective. A method of sufficiently performing the method or keeping the temperature inside the furnace at a high temperature was used.

On the other hand, as one of the means for reducing the amount of dioxin produced, RDF (Refuse Derive) is used.
d Fuel) has been receiving attention in recent years. RDF is
It is said to be solid waste fuel, and it is a fuel produced by crushing and sorting waste that is mainly discharged from homes, compressing it, molding it, and reducing its volume. RDF has advantages such as excellent storability and transportability, is easy to collect in a wide area, and can be collectively processed in a large plant, and is attracting attention as a pioneer in countermeasures against dioxin. There have been proposed many methods for forming a solid fuel using a material as a raw material (see, for example, Patent Documents 1 and 2).

However, some problems have been pointed out in the conversion of waste to RDF. For example, even if the waste is converted to RDF, it is not possible to reliably suppress the generation of dioxin during the combustion. Basically, regulations on dioxins are also applied to RDF facilities, so R
It is necessary to further reduce the generation of dioxins during combustion of DF. Furthermore, the calories of RDF is about 32.
Since it is about 00 kcal / kg, which is smaller than fossil fuels such as coal, RDF alone cannot be said to be sufficient as an alternative fuel to fossil fuels.

In order for the RDF (solid waste) facility to operate stably as a waste treatment facility, it is necessary to have a facility capable of reliably burning the produced fuel. R
Not only DF facilities, but many incinerators that are required to tighten dioxin regulations do not meet the criteria. At this stage, in order for such existing facilities to meet the standard of dioxin regulation, the only effective way is to close the facilities other than changing the structure of the incinerator and the operation method. In this way, changing the structure of the incinerator or changing the operation method requires a great deal of money, so while using the existing facility,
There is a strong demand for early development of methods that can reduce the amount of dioxins generated.

On the other hand, in recent years, bakuhanishi has attracted attention as a raw material having a water purifying action and a soil purifying action. Bakuhanishi may exhibit different properties depending on the place of production, and methods of using these have been proposed (see, for example, Patent Documents 3 and 4).

[0010]

[Patent Document 1] JP-A-8-333589

[Patent Document 2] Japanese Unexamined Patent Publication No. 8-333590

[Patent Document 3] Japanese Patent Laid-Open No. 2001-87668

[Patent Document 4] Japanese Patent Laid-Open No. 11-200964

[0011]

As described above, reduction of the amounts of dioxins and cadmium generated during incineration of waste is a serious problem to be solved in modern society at an early stage. In addition to this, the development of effective recycling methods for general waste and industrial waste, and the development of new energy fuels as alternative fuels for fossil fuels such as coal can be said to be one of the important issues in recent years.

The present invention aims to solve the following problems in order to solve the above problems. A first aspect of the present invention is to provide a waste fuel in which the generation of harmful substances such as dioxins and cadmium during incineration is sufficiently suppressed. A second aspect of the present invention is to provide a waste combustion method that can be used in existing facilities and sufficiently suppresses the generation of harmful substances such as dioxins and cadmium.

[0013]

[Means for Solving the Problems] The above-mentioned problems are as follows.
Will be solved by. <1> Combustible waste and barley stone containing, the barley rice
The stone contains calcium oxide (CaO) as a constituent component.
00 to 3.50 mass%,Ferrous oxide (FeO) 1.7
0 to 2.50 mass%,Ferric oxide (Fe ₂ O ₃ ) 2.0
0 to 2.50 mass%, magnesium oxide (MgO)
1.00 to 1.50% by mass, sodium oxide (Na
₂ O) 4.50 to 5.00 mass%, potassium oxide (K ₂
O) is 3.80 to 4.20% by mass,ToBeijing boiled rice containing
Be a stoneIt is a waste fuel characterized by.

[0014]

[0015]

< 2 > The above-mentioned barley stone has, as a constituent component,
63.35 mass% of silicon dioxide (SiO ₂ ), 2.36 mass% of ferric oxide (Fe ₂ O ₃ ), ferrous oxide (Fe
2.00 mass% and potassium oxide (K ₂ O) 4.
07% by mass, diphosphorus pentoxide (P ₂ O ₅ ) 0.33% by mass, titanium oxide (TiO ₂ ) 0.82% by mass, aluminum oxide (Al ₂ O ₃ ) 16.12% by mass, oxidation 3.15% by mass of calcium (CaO), manganese oxide (M
nO) 0.06% by mass, magnesium oxide (MgO)
1.37 mass% and sodium oxide (Na ₂ O) 4.
84% by mass and 0.86% by mass of water (H ₂ O) are contained in the waste fuel of the above <1> .

< 3 > The waste fuel according to the above <1> or <2> , wherein the content of the barley stone is 5 to 20 mass% with respect to the dry mass of the combustible waste.

< 4 > The waste fuel according to the above <1> to < 3 >, which is a powder.

< 5 > The waste fuel according to the above <1> to < 3 >, which is characterized by being solidified.

[0020] <6> 3.00 to 3.50 wt% calcium oxide (CaO) as a component, ferrous oxide and (FeO) 1.70-2.50 wt% ferric oxide
(Fe ₂ O ₃ ) 2.00 to 2.50% by mass, oxidized magnesium
1.00 to 1.50 mass% of sium (MgO), sodium oxide
4.50 to 5.00 mass% of thorium (Na ₂ O), acid
3.80 to 4.20 mass% potassium iodide (K ₂ O),
A method for burning waste, which is characterized in that the waste is burned in the presence of Beijing Baihanishi contained therein .

< 7 > The method for burning waste according to the above < 6 >, wherein the Beijing barley stone is contained in waste fuel solidified together with combustible waste.

< 8 > The method for burning waste according to < 6 > above, wherein the Beijing barley stone is contained in a powder waste fuel mixed with combustible waste.

< 9 > The method for burning waste according to the above <6> to <8> , further comprising burning the waste with an auxiliary fuel.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The waste fuel of the present invention and the combustion method of the present invention will be described in detail below.

<< Waste Fuel >> The waste fuel of the present invention comprises combustible waste and calcium oxide (Ca) as a constituent.
O) 3.00 to 3.50 mass%, ferrous oxide (Fe
O) in the range of 1.70 to 2.50% by mass, and (hereinafter, may be referred to as “barite stone in the present invention”),
It is characterized by containing.

The waste fuel of the present invention is a fuel made of combustible waste as a raw material. By using the barley stone of the present invention in combination with this fuel, dioxin and cadmium generated during incineration are included. It is possible to suppress the generation of harmful substances (hereinafter, these may be collectively referred to as “dioxin”). In particular, the waste fuel of the present invention is
It is possible to effectively suppress the generation of dioxins contained in the combustion gas. Further, although the calorie of the conventional RDF is about 3200 kcal / kg, the waste fuel of the present invention can generate the same calorie as that of coal, and is suitable as an alternative fuel to fossil fuel. Can be used. Further, according to the waste fuel of the present invention, it is possible to increase the collection rate of dust to 90% or more.

The waste fuel of the present invention may be solidified (processed into pellets). When the waste fuel of the present invention is solidified, its shape is not particularly limited, but can be, for example, a columnar shape. When the waste fuel of the present invention is formed into a cylindrical shape, its diameter is, for example, about 15
Is about 20 mm, and the length is about 20-50 mm.

Further, the waste fuel of the present invention may be used as it is as a powder in which combustible waste and barley stone are mixed. When the waste fuel of the present invention is used as powder, the volume average particle size of the particles is not particularly limited, but is 30 μm to 5.
It is preferably about 0 mm, more preferably about 40 μm to 3.0 mm.

<Combustible waste> In the present invention, "combustible waste" means wastes excluding noncombustible wastes such as glass and metal, and if it is combustible, general wastes and industrial wastes. Any of the things are included. The term "waste" means liquid or solid waste generated by human activity.

The above-mentioned industrial waste means the waste generated by business activities. Examples of the industrial waste include wood waste, waste plastics such as reinforced plastic (FRP), paper waste, fiber waste, rubber waste, animal residues, burnt husks, and the like. For example, waste generated by processing scallops. Can be preferably used.

The above-mentioned general waste means wastes other than the above-mentioned industrial wastes, and examples thereof include wastes discharged in daily life, wastes discharged from factories, offices, shopping streets, and the like. In the present invention, it is not necessary to strictly distinguish between these industrial wastes and general wastes,
Any combustible waste can be used.

The content of the combustible waste in the waste fuel of the present invention is preferably 60 to 95% by mass, and 80
˜95% by mass is more preferable.

<Bourneite in the Present Invention> The bourneite used in the present invention contains at least 3.00 to 3.50% by mass of calcium oxide (CaO) and ferrous oxide (FeO) as constituent components. 1.70 to 2.50 mass%
contains. Other constituent components include silicon dioxide (SiO ₂ ), ferric oxide (Fe ₂ O ₃ ), potassium oxide (K ₂ O), diphosphorus pentoxide (P ₂ O ₅ ), titanium oxide (T
iO ₂ ), aluminum oxide (Al ₂ O ₃ ), manganese oxide (MnO), magnesium oxide (MgO), sodium oxide (Na ₂ O), and water (H ₂ O).

Further, as the bakuhanishi in the present invention,
Ferric oxide (Fe ₂ O ₃ ) 2.00 to 2.50 mass%,
Magnesium oxide (MgO) is 1.00 to 1.50 mass% and sodium oxide (Na ₂ O) is 4.50 to 5.00.
% By mass, potassium oxide (K ₂ O) 3.80 to 4.20
Bakuhanishi containing mass% is preferable. Examples of barley stones having such components include Beijing barite stones produced in Beijing. The Beijing barite stone is suitable as the barite stone in the present invention from the viewpoint that it has a good porous structure and is excellent in adsorptive decomposition action.

Specifically, the above-mentioned Beijing barite stone is, for example, barley stone showing the following constituents.

[Components] Silicon dioxide (SiO ₂ ): 63.35% by mass Ferric oxide (Fe ₂ O ₃ ): 2.36% by mass Ferrous oxide (FeO): 2.00% by mass Potassium oxide (K ₂ O): 4.07 mass% phosphorus pentoxide (P ₂ O ₅ ): 0.33 mass% titanium oxide (TiO ₂ ): 0.82 mass% aluminum oxide (Al ₂ O ₃ ): 16. 12 mass% calcium oxide (CaO): 3.15 mass% manganese oxide (MnO): 0.06 mass% magnesium oxide (MgO): 1.37 mass% sodium oxide (Na ₂ O): 4.84 mass% water (H ₂ O): 0.86 mass%

The Beijing bakuhanseki is a rock belonging to the quartz porphyry in the igneous rocks, and contains alkali feldspar and quartz as main components. As for the appearance of Beijing bakuhanseki, white feldspar phenocrysts and gray quartz crystals are studded in a pale tan or light gray basestone. Beijing bakuhanseki is sometimes referred to as the second granite feldspar. Whereas granite porphyry itself is a silicate mineral composed of quartz, alkali feldspar, mica, etc., in Beijing Bakuhanite, part of the silicate mineral in this granite is a natural hydrothermal fluid. And carbon dioxide CO ₂
It is a carbonate mineral that contains O ^{2 / 3-} ions and is melted.

In the Beijing bakuhanite, a part of the shale feldspar has been transformed into calcite (CaCO ₃ ) which is a carbonate mineral. This phenomenon is called “carbonation” and is a major feature of Beijing Bakuhanishi. The above-mentioned carbonation effect is hardly observed in barley stone produced in areas other than Beijing. Table 1 below shows the difference in the constituent components between Beijing bakuhanishi and bakuhanishi produced in other regions.

[0039]

[Table 1]

In addition to the above-described constituent products, Beijing Bakuhanseki contains, for example, trace elements shown in Table 2 below.

[0041]

[Table 2]

The bourneite in the present invention preferably has, for example, a volume average particle size of about 20 to 60 μm.
More preferably, it is about 0 to 40 μm. Also,
The method for purifying bakuhanseki in the present invention is not particularly limited, and a known purification method can be appropriately selected.

The content of the barley stone in the present invention contained in the waste fuel of the present invention is preferably 5 to 20% by mass, and 7.5 to 12% by mass based on the dry mass of the combustible waste.
Is more preferable. The content of barley stone in the present invention,
If it is less than 5% by mass, the effect of the present invention may not be sufficiently exhibited, and if it exceeds 20% by mass, running cost is high, which is not preferable. From the viewpoint of sufficiently suppressing the generation of dioxins and the like, the waste fuel of the present invention contains 90% by mass of combustible waste and 10% by mass of barley stone.
It is preferable that the configuration includes. The waste fuel of the present invention may contain an auxiliary fuel described below.

<Manufacturing Method> Next, a method for manufacturing the waste fuel of the present invention will be described. In the method for producing waste fuel of the present invention, the main processes common to the case where the waste fuel of the present invention is a powder (RPF: Refuse Powder Fuel) and a case where the waste fuel is solidified (RDF) include bag breaking. A sorting step and a drying step are included. Further, when the waste fuel of the present invention is a solidified fuel,
A molding step and a cooling step are further added. Hereinafter, the method for producing waste fuel of the present invention will be described with reference to FIG. However, the method for producing waste fuel of the present invention is not limited to this.

FIG. 1 is a schematic diagram showing a plant facility for producing the waste fuel of the present invention. First, when the domestic waste collected from a general household is carried into the plant by the truck 10, the domestic waste is supplied to the supply pit 14 by the crane 12. At this time, the supply pit 14
In order to prevent old trash from being stored in the pit, it is divided into two parts so that trash can be put in and out first.
Further, a pit shutter is installed above the supply pit 14 so that a bad odor does not leak due to suction in the pit.

Since the garbage in the supply pit 14 has been collected, it is conveyed to the bag breaking machine 16 and broken.
The household waste that has been bag-broken by the bag-breaking machine 16 is conveyed to the manual sorting belt conveyor 20 via the belt conveyor 18. The hand-selection belt conveyor is equipped with a metal detector 24, and when transporting waste, the main metals and large glass in general refuse are removed by manual selection.
After that, the general waste is sent to the primary crusher 26 and crushed by the primary crusher 26 in advance. The general waste crushed by the primary crusher 26 is crushed by the secondary crusher 30 after the metal is removed by the magnetic separator 28.
The secondary crusher 30 crushes the preliminarily crushed general dust from which the metal has been removed to a size (about 3.0 to 5 cm) that is easy to dry. In addition, a weight scale 22 is provided on the conveying path from the primary crusher 26 to the secondary crusher 30, and after the crushing by the primary crusher 26, the mass of general waste is measured by the weight scale 22. There is. In addition, in the subsequent steps, general waste is referred to as waste.

The waste crushed by the secondary crusher 30 is then conveyed to the dryer 32 and dried. The dryer 32 can heat the waste with hot air at about 600 ° C. for about 10 minutes to reduce the water content of the waste to 10% or less. The waste material dried by the dryer 32 is conveyed to the primary wind power sorter 36 by the discharge conveyor 34.
It should be noted that the dry exhaust gas generated during the drying of the waste is about 18
Since it is 0 ° C and contains dust mixed with water vapor, it is removed by a heat exchanger (not shown) after removing dust.
It is preheated to about 50 ° C. and exhausted from the deodorizing furnace 38.

The primary wind power sorter 36 uses the difference in specific gravities to sort the wastes dried by a certain amount of air into combustible wastes and unsuitable primary fuels including glass, earth and sand, leathers and the like. . The unsuitable primary fuel sorted by the primary wind power sorter 36 is sent to the preliminary crusher 37 and crushed. At this time, the preliminary crusher 37 separates the waste into small pieces (about 2
Crush up to (cm or less). The waste (primary fuel unsuitable) crushed into small pieces by the preliminary crusher 37 is sent to the secondary wind power sorter 40, and sorted into a combustible waste and a secondary fuel unsuitable waste by a certain amount of air.

Primary wind sorter 36 and secondary wind sorter 4
The combustible waste sorted by 0 is further mixed by the mixer 42.
Sent to. The mixer 42 includes a combustible waste and a feeder 44.
The waste fuel of the present invention is obtained by mixing with Beijing Bakuhanseki supplied from Japan. At this time, the mixer 42 may be configured to crush the combustible waste and Beijing barley stone to a certain particle size. In addition, the Beijing Baihan Stone, which has been crushed to a certain size and purified, is supplied to the feeder 44. Further, the amount of Beijing bakuhanishi supplied to the mixer 42 by the feeder 44 is
It is controlled based on the mass of the waste measured by the scale 24.

Here, the waste fuel of the present invention is powder (RP
When used as F), after being mixed by the mixer 42, it is crushed to a predetermined particle size, packed in bags, and shipped.

On the other hand, when the waste fuel of the present invention is solidified, the waste and Beijing barley stone are mixed with slaked lime or the like. The mixture of the combustible waste and the Beijing barley stone mixed by the mixer 42 (waste fuel of the present invention) is conveyed to the constant quantity feeder 46. The constant quantity feeder 46 cuts out the mixture into a predetermined amount and supplies it to the molding machine 48. Molding machine 4
8 will be installed about 5 units including the spare machine, and usually 3,
A configuration in which four units are operating may be used.

The molding machine 48 continuously molds the mixture (waste fuel of the present invention) into a columnar predetermined size and discharges it. As the molding machine 48, a rotary press type compression molding machine or the like can be used. The mixture of the combustible waste and Beijing barley stone is, for example, a cylinder rotating at high speed, from the inside of a die provided with a plurality of holes having a diameter of several centimeters, is press-fitted by a roll into a cylindrical pellet. Molded.

The molded mixture (solidified waste fuel of the present invention) is then sent to the cooler 50 and cooled from about 80 ° C. to near room temperature by the cooler 50.
The waste fuel of the present invention is cooled by the cooler 50, then classified by the vibrating screen 52, and conveyed to the molded product hopper 54. At this time, the unmolded product is returned to the molding machine 48 again. Next, the pellet-shaped waste fuel of the present invention conveyed to the molded product hopper 54 is packed while being automatically weighed by the weighing device 56, and shipped by the truck 58.

<< Waste Burning Method >> Next, the waste burning method of the present invention will be described. The method for burning waste according to the present invention (hereinafter sometimes referred to as "the method for burning according to the present invention").
Is calcium oxide (CaO) 3.0 as a constituent.
0-3.50 mass% and in the presence of barley stone containing ferrous oxide (FeO) 1.70-2.50 mass%,
It is characterized by burning waste. The barley stone used in the combustion method of the present invention is the same as the barley stone of the present invention described above, and Beijing barite stone is particularly preferable.

The combustion method of the present invention can achieve the effect of the present invention by burning the waste together with the barley stone in the present invention. Therefore, by introducing it into an existing facility, it is possible to reduce the amount of dioxins generated without making a major design change or operating method change of the incinerator.

In the combustion method of the present invention, the mode of addition of the barley stone in the present invention is not particularly limited, and the fuel and the barley stone may be directly mixed and used at the time of incineration by the incinerator. From the viewpoint of energy efficiency, it is preferable to use the above-mentioned solid or powder waste fuel of the present invention.

<Auxiliary Fuel> In the method for burning waste according to the present invention, an auxiliary fuel can be used in combination within the range where the effect of the present invention is not impaired when burning the waste, so that the burning of the waste can be performed more efficiently. Can be done. Examples of the auxiliary fuel include asphalt, coal powder, waste oil and the like.

The amount of the auxiliary fuel added can be appropriately selected in a range that does not impair the effects of the present invention in consideration of the desired heat amount and the like. For example, with respect to the dry mass of the main fuel, 5-40 mass% is preferable, and 10-30
It is more preferable that the content is about mass%.

[0059]

EXAMPLES The waste fuel of the present invention will be described below with reference to examples. In addition, all "parts" in an Example represent a "mass part," and all "%" represent the "mass%."

[Example 1] Combustible waste (vinyl, P
750 parts of combustible municipal waste including ET (polyethylene terephthalate) and plastic, 100 parts of coal powder,
150 parts of waste oil and 18.75 parts of Beijing Bakuhanishi were mixed to prepare a powdery waste fuel (1) of the present invention.

[Evaluation] A combustion experiment of the waste fuel (1) of the present invention obtained as described above was conducted using the combustion experiment apparatus shown in FIG. In FIG. 2, the combustion experimental apparatus includes a blast gas cylinder 60, a flow meter 62, a quartz combustion boat 64, a quartz tubular combustion tube (quartz tube) 66, an electric tubular furnace 68, and a glass connection adapter. 70, a cylindrical filter paper 72, and a collecting instrument 74.

First, a quartz sand trapping portion 76 as shown in FIG. 3A was set on the quartz tube 66. Then, the quartz tube 66 was attached to the electric tubular furnace 68, and the connection adapters 70 were connected to both ends of the quartz tube 66. At this time, the quartz tube 66 is shown in FIG.
As shown in (A), the gas inlet side was pulled out as much as possible and attached to the electric tubular furnace 68.

Next, the blast gas cylinder 60, the flow meter 62, and the connection adapter 70 on the inlet side of the quartz tube 66 are connected, and further, the adapter 70 on the outlet side of the quartz tube 66, the cylindrical filter paper 72, and the collecting instrument 74. And are connected. In addition, as shown in FIG. 4, the collecting instrument 74 includes an n-hexane absorbing bubbler 74a, an empty bubbler 74b for n-hexane overflow correspondence, and a resin 74 from the cylindrical filter paper 72 side.
c, bubbler 74d for absorbing diethylene glycol, empty bubbler 7 for responding to diethylene glycol overflow
4e.

Next, the mass of the combustion board 64 is measured,
Furthermore, after the waste fuel (1) of the present invention was collected on the combustion board 64, the mass was measured again. afterwards,
The electric tubular furnace 68 was set to 850 ° C. and turned on, and the combustion board was put together with the waste fuel (1) of the present invention, and the quartz tube 66.
It was put in the entrance side of and the blast gas was made to flow.

Thereafter, as shown in FIG. 3 (B), the quartz tube 66 is moved so that the combustion board 64 is located at the center of the heating portion, and the waste fuel (1) of the present invention is burned for repair. Harmful substances contained in the exhaust gas were collected by the instrument 74.

Then, after confirming that the waste fuel of the present invention was completely burned on the combustion board 64, the quartz tube 66 was used.
Was moved, the combustion board 64 was taken out from the quartz tube 66, and the mass of the combustion board 64 was measured. The residue was transferred to a glass container.

From the above combustion experiments, the calorific value of the sample, the amount of dioxins generated in the exhaust gas, the Co in the exhaust gas,
-The amount of PCB generated, the amount of dioxins generated in the fuel residual component, the amount of Co-PCB generated in the fuel residual component, and the amount of cadmium generated in the fuel residual component were measured. In addition, the value of the measured value is an average value of 10 times of the above combustion experiments. The results are shown in Table 3 below. The conditions in the combustion experiment are as follows.

(Combustion conditions) -tube diameter of the quartz tube 66 30 mmφ-length of the quartz tube 66 60 cm-cross-sectional area of the quartz tube 66 7.065 cm ² -internal volume of the quartz tube 66 424 cm ³ -heating of the electric tubular furnace 68 Internal volume of the part 233.145 cm ³・ Set temperature of the electric tubular furnace 68 850 ° C ・ Assumed combustion state Complete combustion of sample ・ Assumed air flow 2 liters / min ・ Assumed heating time 20 minutes

[Example 2] Combustible waste (vinyl, P
700 parts of combustible general waste including ET (polyethylene terephthalate) and plastics, 100 parts of coal powder,
200 parts of waste oil and 21.0 parts of Beijing Bakuhanishi were mixed to prepare a powdery waste fuel (2) of the present invention, and the same experiment as in Example 1 was conducted. The results are shown in Table 3 below.

[Comparative Example 1] Combustible waste (vinyl, P
Combustible general waste containing ET (polyethylene terephthalate) and plastic was molded to prepare a waste fuel for comparison (3), and the same experiment as in Example 1 was conducted. The results are shown in Table 3 below.

[0071]

[Table 3]

The above results are measured values in a physical state. The calorific value result is a measured value per dry solid matter. Furthermore, the measurement results of dioxins in the exhaust gas are shown as absolute amounts for the combustion sample. Also,
In Table 3, “TEQ” indicates the toxicity equivalent, and the measured concentration of each isomer of dioxins generated was multiplied by the toxicity equivalent coefficient to convert it into the toxicity of 2,3,7,8-T ₄ CDD in ng.
-It is called TEQ. Further, N in "ng-TEQ / cm ³ N" indicates a standard state (0 ° C, 1 atm).

From the results shown in Table 3, the waste fuels (1) and (2) of the present invention were compared with the fuel waste (3) for comparison, and the generation amount of dioxins and the fuel residue content in the exhaust gas were It can be seen that the amount of cadmium generated therein is sufficiently suppressed. In addition, the calorific value of the sample is sufficient, and regarding the amount of Co-PCB generated in the exhaust gas, the amount of dioxins generated in the fuel residue, and the amount of Co-PCB generated in the fuel residue, It was able to fully meet the standards set out for.

[0074]

According to the first aspect of the present invention, it is possible to provide a waste fuel in which the generation of harmful substances such as dioxins and cadmium during incineration is sufficiently suppressed. Further, according to the second aspect of the present invention, it is possible to provide a waste combustion method that can be used in existing facilities and in which the generation of harmful substances such as dioxins and cadmium is sufficiently suppressed.

[Brief description of drawings]

1 is a schematic diagram showing a plant facility for producing the waste fuel of the present invention.

FIG. 2 is a schematic diagram of a combustion experimental apparatus used in Examples.

FIG. 3 is an explanatory diagram showing a relationship between a quartz tube and an electric tubular furnace in a combustion experimental apparatus.

FIG. 4 is a schematic view showing a collecting tool in a combustion experimental apparatus.

[Explanation of symbols]

10,58 Truck 12 Crane 14 Supply pit 16 Bag crusher 18 Belt conveyor 20 Hand sorting belt conveyor 22 Weight scale 24 Metal detector 26 Primary crusher 28 Magnetic separator 30 Secondary crusher 32 Dryer 34 Discharge conveyor 36 Primary wind sorting Machine 37 Preliminary crusher 38 Deodorizing furnace 40 Secondary wind sorter 42 Mixer 44 Feeder 46 Quantitative feeder 48 Molding machine 50 Cooling machine 52 Vibrating sieve 54 Molded product hopper 56 Measuring instrument 60 Blast gas cylinder 62 Flow meter 64 Combustion boat 66 Quartz tube 68 Electric tubular furnace 70 Connection adapter 72 Cylindrical filter paper 74 Collection instrument 74a Hexane absorption bubbler 74b Hexane overflow response empty bubbler 74c Resin 74d Diethylene glycol absorption bubbler 74e Diethylene glycol overflow response empty bubbler 76 Quartz Collecting portion

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) C10L 5/48 B09B 3/00 F23G 5/00 JISST file (JOIS) Patent file (PATOLIS)

Claims (9)

(57) [Claims] 1. A combustible waste material and barley stone are contained, and the barite stone has calcium oxide (Ca) as a constituent.
O) 3.00 to 3.50 mass% , ferrous oxide (Fe
O) 1.70 to 2.50 mass%, ferric oxide (Fe ₂
O ₃₎ of 2.00 to 2.50 wt% magnesium oxide
(MgO) 1.00 to 1.50 mass%, sodium oxide
(Na ₂ O) 4.50 to 5.00 mass%, potassium oxide
3.80 to 4.20 mass% of um (K ₂ O) is contained.
A waste fuel characterized in that it is Beijing Bakuhanishi . _{2. The} boiled stone has, as constituent components, 63.35 mass% of silicon dioxide (SiO ₂ ), 2.36 mass% of ferric oxide (Fe ₂ O ₃ ), and ferrous oxide (FeO). ) Is 2.00% by mass, potassium oxide (K ₂ O) is 4.07% by mass, phosphorous pentoxide (P ₂ O ₅ ) is 0.33% by mass, and titanium oxide (TiO ₂ ) is 0.82% by mass. %, Aluminum oxide (Al ₂ O ₃ ) 16.12 mass%, calcium oxide (CaO) 3.15 mass%, manganese oxide (MnO) 0.06 mass%, magnesium oxide (MgO) 1.37 wt%, 4.84 wt% of sodium oxide (Na ₂ O), water (H ₂ O) 0.86 wt% waste fuel as claimed in claim 1, characterized in that it contains. 3. The waste fuel according to claim 1 , wherein the content of the barley stone is 5 to 20 mass% with respect to the dry mass of the combustible waste. 4. The powder according to claim 1, which is a powder.
Waste fuel according to any one of 3 above. 5. The waste fuel according to any one of claims 1 to 3 , which is solidified. 6. Calcium oxide (Ca) as a constituent
O) 3.00 to 3.50 mass%, ferrous oxide (Fe
O) 1.70 to 2.50 mass%, ferric oxide (Fe ₂
O ₃₎ of 2.00 to 2.50 wt% magnesium oxide
(MgO) 1.00 to 1.50 mass%, sodium oxide
(Na ₂ O) 4.50 to 5.00 mass%, potassium oxide
3.80 to 4.20 mass% of um (K ₂ O) is contained.
A method of burning waste, characterized by burning the waste in the presence of Beijing Baihanishi . 7. The method for burning waste according to claim 6 , wherein the Beijing barley stone is contained in waste fuel solidified together with combustible waste. 8. The method for burning waste according to claim 6 , wherein the Beijing barley stone is contained in powder waste fuel mixed with combustible waste. 9. The method for burning waste according to claim 6 , further comprising burning the waste using auxiliary fuel.