JP2004019979A - Incineration method for combustible waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a incineration method for combustible waste for preventing generation of dioxin and removing the other toxic substance in incineration. <P>SOLUTION: The granular combustible waste and emulsion containing at least water and fuel oil are burned in a mixing state. By combustion of the fuel oil in the emulsion, cluster-like water drops in the emulsion are diffused to the whole combustion area, each the water drop causes small phreatic explosion, and a ≤1/25 supply amount of air from the outside compared to normal combustion is sufficient. Accordingly, non-combusted carbon concentration is significantly small to extremely hardly form a benzene nucleus, and a partial high-temperature area is hardly generated in the combustion area. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for incinerating flammable industrial waste and general waste.
[0002]
[Prior art]
Most of flammable industrial waste and general waste has high energy, so use the flammable waste energy for power generation and perform intermediate treatment before final disposal such as landfill. For this reason, incineration of combustible waste is widely performed. However, harmful substances such as chlorine gas (Cl ₂ ), sulfur oxides (SO _x ), and nitrogen oxides (NO _x ) are discharged by this incineration, and chlorine in particular causes dioxin. The environment is adversely affected.
[0003]
In order to prevent the generation of these harmful substances, a method has been considered in which the exhaust gas after incineration is washed with water and the harmful substances are captured with water. Further, it is said that the generation of dioxin can be suppressed by incinerating combustible waste at a high temperature and quenching the exhaust gas under strict temperature control.
[0004]
[Problems to be solved by the invention]
However, in the method of trapping harmful substances with water, the water after washing has a secondary adverse effect on public health and the natural environment. In addition, strict temperature control and rapid cooling methods require high processing costs and can suppress the emission of harmful substances such as chlorine gas, sulfur oxides, and nitrogen oxides even if the generation of dioxins can be suppressed. Can not. Therefore, the invention of the present application prevents the generation of dioxin during incineration and removes other harmful substances, thereby preventing adverse effects on public health and the natural environment, and effectively utilizing the energy held by combustible waste. It is another object of the present invention to provide a method capable of incinerating combustible waste.
[0005]
[Means for Solving the Problems]
In the method for incinerating combustible waste according to claim 1, the combustion of the fuel oil in the emulsion causes cluster-like water droplets in the aqueous base solution in the emulsion to diffuse throughout the combustion region, causing each of the small steam explosions, Granular combustible waste becomes finer. For this reason, the air contact area of the combustible waste becomes very large, and the combustion efficiency of the combustible waste is extremely high. Further, the oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of that of normal combustion, so that the temperature of the object to be burned is maintained at a high temperature. As a result, combustible waste is burned in a state close to complete combustion.
[0006]
Therefore, most of the carbon contained in the combustible waste becomes carbon dioxide, the concentration of unburned carbon is extremely low, and benzene nuclei are extremely unlikely to be formed. Further, chlorine and sulfur are almost completely separated from the combustible waste, and the chlorine gas and sulfur oxide due to these are neutralized with the ionic base in the aqueous base solution in the emulsion to precipitate as salts.
[0007]
In addition, combustion occurs uniformly in the combustion region due to the above-described steam explosion, and it is difficult to form a partial high-temperature region in the combustion region. Further, as described above, oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of the normal combustion. For these reasons, nitrogen oxides generated during combustion are hardly generated, and the generated nitrogen oxides also undergo a neutralization reaction with the ionic base in the aqueous base solution in the emulsion to precipitate as salts.
[0008]
Further, since the combustible waste is burned in a state close to complete combustion, the stored energy of the combustible waste is effectively extracted. If the mass ratio of the aqueous base solution in the emulsion is less than 40%, steam explosion becomes too small to prevent formation of benzene nuclei, separation of chlorine and sulfur from combustible waste, and combustion. It is difficult to prevent the formation of nitrogen oxides. On the other hand, if the mass ratio of the aqueous base solution in the emulsion is more than 80%, the fuel oil becomes too small, and the combustion of combustible waste itself becomes difficult.
[0009]
In the method for incinerating combustible waste according to claim 2, the combustion of the fuel oil in the emulsion causes the cluster-like water droplets in the emulsion to diffuse throughout the combustion region, causing each of them to generate a small steam explosion, thereby causing the particulate combustible. Wastes become finer. For this reason, the air contact area of the combustible waste becomes very large, and the combustion efficiency of the combustible waste is extremely high. Further, the oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of that of normal combustion, so that the temperature of the object to be burned is maintained at a high temperature. As a result, combustible waste is burned in a state close to complete combustion.
[0010]
Therefore, most of the carbon contained in the combustible waste becomes carbon dioxide, the concentration of unburned carbon is extremely low, and benzene nuclei are extremely unlikely to be formed. Chlorine and sulfur are almost completely separated from combustible waste, and chlorine gas and sulfur oxides are neutralized by the water contained in the mixture with combustible waste and ionized by water in the emulsion. Reacts and precipitates as a salt.
[0011]
In addition, combustion occurs uniformly in the combustion region due to the above-described steam explosion, and it is difficult to form a partial high-temperature region in the combustion region. Further, as described above, oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of the normal combustion. For these reasons, nitrogen oxides generated during combustion are not easily generated, and the generated nitrogen oxides are also included in a mixture with combustible waste and neutralized with a base ionized by water in the emulsion. And precipitate as salt.
[0012]
Further, since the combustible waste is burned in a state close to complete combustion, the stored energy of the combustible waste is effectively extracted. If the mass ratio of water in the emulsion is less than 40%, the steam explosion becomes too small to prevent formation of benzene nuclei, separation of chlorine and sulfur from combustible waste, and combustion. It becomes difficult to prevent the generation of the generated nitrogen oxides. On the other hand, if the mass ratio of water in the emulsion is more than 80%, the fuel oil becomes too small, and the combustion of combustible waste itself becomes difficult.
[0013]
In the method for incinerating combustible waste according to claim 3, the combustion of the fuel oil in the emulsion causes the cluster-like water droplets in the emulsion to diffuse throughout the combustion area, causing each of them to generate a small steam explosion, thereby causing the particulate combustible. Wastes become finer. For this reason, the air contact area of the combustible waste becomes very large, and the combustion efficiency of the combustible waste is extremely high. Further, the oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of that of normal combustion, so that the temperature of the object to be burned is maintained at a high temperature.
[0014]
As a result, combustible waste is burned in a state close to complete combustion. Therefore, most of the carbon contained in the combustible waste becomes carbon dioxide, the concentration of unburned carbon is extremely low, and benzene nuclei are extremely unlikely to be formed.
[0015]
In addition, combustion occurs uniformly in the combustion region due to the above-described steam explosion, and it is difficult to form a partial high-temperature region in the combustion region. Further, as described above, oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of the normal combustion. For these reasons, it is difficult to generate nitrogen oxides generated during combustion.
[0016]
Further, since the combustible waste is burned in a state close to complete combustion, the stored energy of the combustible waste is effectively extracted. When the mass ratio of water in the emulsion is less than 40%, steam explosion becomes too small, and it is difficult to prevent formation of benzene nuclei and generation of nitrogen oxides caused by combustion. On the other hand, if the mass ratio of water in the emulsion is more than 80%, the fuel oil becomes too small, and the combustion of combustible waste itself becomes difficult.
[0017]
In the method for incinerating combustible waste according to claim 4, since the pulverized wood material is mixed with the combustible waste, the amount of heat during combustion can be adjusted. Therefore, the combustible waste burns in a state closer to complete combustion, and benzene nuclei are less likely to be formed. In addition, since combustible waste burns in a state closer to complete combustion, the separation of chlorine and sulfur from combustible waste is promoted, and the neutralization reaction between chlorine gas and sulfur oxides and bases due to these is promoted. Salt precipitation is also promoted. Further, since the combustible waste is burned in a state closer to complete combustion, the stored energy of the combustible waste is more effectively taken out.
[0018]
In the method for incinerating combustible waste according to claim 5, combustion is performed in a spiral flow path around the heat storage tank in the second region on the combustion end side. Therefore, the temperature of the material to be burned is maintained at a higher temperature by the heat storage effect of the heat storage tank, and the residence time of the material to be burned in the combustion region is long due to the spiral flow path. As a result, combustible waste burns in a state closer to complete combustion, and benzene nuclei are less likely to be formed.
[0019]
In addition, since combustible waste burns in a state closer to complete combustion, the separation of chlorine and sulfur from combustible waste is promoted, and the neutralization reaction between chlorine gas and sulfur oxides and bases due to these is promoted. Salt precipitation is also promoted. Further, since the combustible waste is burned in a state closer to complete combustion, the stored energy of the combustible waste is more effectively taken out.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG. In the present embodiment, the combustible waste is dried in the drying equipment 11, cooled and pulverized into granules by the pulverizer 12, and sent to the calorie adjusting equipment 13. Further, the woody material is pulverized by the pulverizer 14, dried by the drying equipment 15, measured by the measuring equipment 16, and sent to the calorie adjusting equipment 13. After the calorific value of the combustible waste during combustion of the combustible waste is adjusted by the wood material in the calorie adjusting device 13, the combustible waste and the wood material are sent to the mixing and stirring device 17.
[0021]
The remaining pulverized wood material is also sent to the mixing and stirring device 17 by the feeder 18 so that the mass ratio of the combustible waste and the wood material whose calorific value is adjusted is 1: 1. Further, a powdery base such as calcium hydroxide or sodium hydroxide is measured by the measuring equipment 19 and sent to the mixing and stirring device 17 by the feeder 21. The combustible waste, the wood material, and the base are mixed and agitated by the mixing and agitation device 17, sent to the vibrator feeder 24 of the primary combustion furnace 23 by the transfer device 22, and uniformly sent to the hopper 25. Has become.
[0022]
On the other hand, fuel oil, which is kerosene or A-heavy oil, is fed into the fuel oil storage tank 26 from the fuel oil receiving facility 28 according to the indication value of the liquid level meter 27. Then, the fuel oil in the fuel oil storage tank 26 is sent to the metering facility 34 by the fuel oil transfer pipe 29, the fuel oil transfer pump 31, and the fuel oil supply pipes 32 and 33. The fuel oil supply pipe 32 is provided with a pressure gauge 35 for operating the fuel oil transfer pump 31. The fuel oil measured by the metering facility 34 is sent to the gel manufacturing device 36.
[0023]
The surfactant is sent from the surfactant receiving facility 38 to the surfactant storage tank 37, and the surfactant removed from the surfactant storage tank 37 is measured by the measuring facility 39 and sent to the gel manufacturing device 36. A gel of the fuel oil is produced from the fuel oil and the surfactant by the gel producing device 36, and an emulsion containing 20% by mass of water and the fuel oil is produced by a water 20% emulsion producing machine 41. Further, an emulsion containing 60% by mass of water and fuel oil is produced by the water 60% emulsion production machine 42, and the fluidity of the emulsion is improved.
[0024]
Water is supplied from a water tank 43 to a water 20% emulsion production machine 41 and a water 60% emulsion production machine 42 by a water supply pipe 44, and water is sent from the city water receiving facility 45 to the water tank 43. The water 60% emulsion production machine 42 is installed near the ejectors 47 and 48 of the primary combustion furnace 23 and the secondary combustion furnace 46, respectively. Then, it is sent to the ejectors 47 and 48 by the emulsion supply pipe 51, and is in a standby state.
[0025]
Compressed air is produced by the air compressor 52 and sent to the air storage tank 54 by the air supply pipe 53 so that the emulsion is smoothly sprayed from the ejectors 47 and 48. The air compressor 52 and the air storage tank 54 are provided with pressure gauges 55 and 56, respectively, and a pressure switch 57 controls the operation of the air compressor 52 in response to the indicated value of the pressure gauge 56. The air storage tank 54 is also provided with a safety valve 58. The pressure of the compressed air in the air storage tank 54 is adjusted by the pressure adjustment valve 60 of the air supply pipe 59, and is in a standby state in which the ejectors 47 and 48 can operate.
[0026]
In the standby state as described above, first, the fuel oil is taken out of the fuel oil storage tank 26, and the fuel oil is transferred from the fuel oil transfer pipe 29, the fuel oil transfer pump 31, the fuel oil supply pipe 32, and the fuel oil supply branch pipes 61, 62 to the primary combustion furnace 23. Then, the fuel is sent to the fuel oil burners 63 and 64 of the secondary combustion furnace 46, and the combustion of only the fuel oil is started. When the temperature in the primary combustion furnace 23 and the temperature in the secondary combustion furnace 46 reach 800 ° C. at which the emulsion combustion can be performed by the combustion of only the fuel oil, the operation of the ejectors 47 and 48 is started, and the emulsion burners 65 and 66 are started. , The emulsion is sprayed and the combustion of the emulsion is started.
[0027]
When the temperatures in the primary combustion furnace 23 and the secondary combustion furnace 46 reach 1100 ° C. in these fuel oil combustion and emulsion combustion, fuel oil combustion in the secondary combustion furnace 46 is stopped, and at the same time, combustible waste is discharged. The mixture of the material, the wood material, and the base is put into the primary combustion furnace 23 from the hopper 25, and the combustion of the mixture is started. Then, when the temperatures in the primary combustion furnace 23 and the secondary combustion furnace 46 reach 1300 ° C., the fuel oil combustion in the primary combustion furnace 23 is stopped, and the emulsion combustion and the mixture combustion are continued.
[0028]
In the emulsion combustion, the combustion of fuel oil in the emulsion causes cluster-like water droplets in the emulsion to diffuse throughout the primary combustion furnace 23 and the secondary combustion furnace 46, causing small steam explosions, each of which causes granular combustible waste. Things become finer. For this reason, the air contact area of the combustible waste becomes very large, and the combustion efficiency of the combustible waste is extremely high. Further, since the oxygen required for combustion is supplied from steam and the supply amount of air from the outside is not more than 1/25 of the normal combustion, the combustible waste in the primary combustion furnace 23 and the secondary combustion furnace 46 is reduced. Temperature is maintained at a high temperature.
[0029]
As a result, combustible waste is burned in a state close to complete combustion. For this reason, most of the carbon contained in the combustible waste becomes carbon dioxide, the unburned carbon concentration is extremely low, the smoke is very small, and no smoke is emitted. In addition, due to the above-mentioned steam explosion, combustion occurs uniformly in the primary combustion furnace 23 and the secondary combustion furnace 46, and it is difficult to form a partial high-temperature region in the primary combustion furnace 23 and the secondary combustion furnace 46. Further, as described above, oxygen required for combustion is supplied from steam, and the supply amount of air from the outside may be 1/25 or less of the normal combustion. For these reasons, it is difficult to generate nitrogen oxides generated during combustion.
[0030]
When combustible waste is burned in a state close to complete combustion, chlorine, sulfur and the like are almost completely separated from the combustible waste, and these become chlorine gas and sulfur oxides. On the other hand, the water in the emulsion containing the fuel oil and the water having a mass ratio of 60% injected into the primary combustion furnace 23 and the secondary combustion furnace 46 from the ejectors 47 and 48 causes the primary combustion furnace 23 to move from the hopper 25 to the primary combustion furnace 23. The base in the mixture being charged to the is ionized.
[0031]
Then, the ionized base undergoes a neutralization reaction with chlorine gas, sulfur oxides, nitrogen oxides, and the like in the primary combustion furnace 23 and the secondary combustion furnace 46, and is precipitated as a stationary phase salt. Therefore, generation of dioxin is prevented and harmful substances such as chlorine gas, sulfur oxides and nitrogen oxides are removed.
[0032]
However, if chlorine gas, sulfur oxides, nitrogen oxides, and the like are excessive and remain without being removed by the neutralization reaction, they float in the primary combustion furnace 23 and the secondary combustion furnace 46. When the floating is detected by the sensor 67, a sensing signal is sent to the aqueous base solution manufacturing apparatus 69, and an aqueous base solution containing a base such as calcium hydroxide or sodium hydroxide is manufactured by the aqueous base solution manufacturing apparatus 69.
[0033]
The aqueous base solution produced by the aqueous base solution producing device 69 is sent to the 60% water emulsion producing device 42 after concentration adjustment and measurement by the concentration adjustment measuring device 71. The base is sent from the base receiving equipment 72 to the base aqueous solution producing device 69, and water is sent from the water tank 43 to the base aqueous solution producing device 69 and the concentration adjusting and measuring device 71 via the water supply pipe 44 and the water supply branch pipe 73. In the water 60% emulsion production machine 42, an emulsion containing water and fuel oil at a mass ratio of 60% was produced up to that time. However, when a base is sent from the concentration adjusting and measuring device 71, the base with a mass ratio of 60% is produced. An emulsion containing an aqueous solution and a fuel oil is produced.
[0034]
Emulsions containing a 60% by weight aqueous base solution and fuel oil are injected from ejectors 47 and 48 into the primary combustion furnace 23 and the secondary combustion furnace 46. The water in the emulsion containing the aqueous base solution and the fuel oil having a mass ratio of 60% newly injected into the primary combustion furnace 23 and the secondary combustion furnace 46 from the ejectors 47 and 48 also causes the primary combustion furnace 23 to move from the hopper 25 to the primary combustion furnace 23. The base in the mixture being introduced into the reactor is ionized.
[0035]
Then, the ionized base and the base in the aqueous base solution in the emulsion undergo a neutralization reaction with chlorine gas, sulfur oxides, nitrogen oxides, and the like in the primary combustion furnace 23 and the secondary combustion furnace 46, and are fixed. Precipitates as phase salt. Therefore, harmful substances such as excessive chlorine gas, sulfur oxides and nitrogen oxides are also removed. Residues generated in the primary combustion furnace 23 and the secondary combustion furnace 46 accumulate in a residue outlet 74, are taken out through a damper 75, and are carried out by a residue take-out conveyor 76.
[0036]
A heat exchanger 77 is provided as a succeeding stage of the secondary combustion furnace 46. However, if the heat exchanger 77 is directly connected to the secondary combustion furnace 46, salts precipitated by the neutralization reaction, in particular, salt, are heated. It adheres to the inner wall surface of the heat exchanger 77 and deteriorates the performance of the heat exchanger 77. Therefore, between the secondary combustion furnace 46 and the heat exchanger 77, an easily attachable / detachable coagulator 78 having a structure similar to a water tube type radiator is provided. The adhesion of the deposited salt to the inner wall surface of the heat exchanger 77 is prevented by adhering to the coater 78. For this reason, high-temperature gas from which harmful substances such as chlorine gas, sulfur oxides and nitrogen oxides and salts precipitated from these harmful substances have been removed is sent to the heat exchanger 77.
[0037]
Purified water is taken into the heat exchanger 77 from the purified water supply pipe 79, and high-temperature and high-pressure steam obtained by heat exchange between the purified water and the high-temperature gas is sent to the power generation equipment 81. The heat exchanger 77 is also provided with a pressure gauge 82, a safety valve 83, and a thermometer 84. The heat-exchanged exhaust gas is sent to the dust collector 85, and soot and the like in the exhaust gas that have not been accumulated in the residue outlet 74 are removed by the dust collector 85. The exhaust gas from which soot and the like have been removed is attracted by an induction blower 86 and sent to a gas cleaner 88 via an exhaust pipe 87.
[0038]
In the gas washer 88, the aqueous base solution is sprayed from the aqueous base solution tank 89 by the circulation pump 91 at a high pressure from the spray nozzle 93 through the aqueous base solution pressurizing pipe 92. A pressure gauge 94 is provided in the base aqueous solution supply pipe 92. By spraying the aqueous base solution from the spray nozzle 93, harmful substances such as chlorine gas, sulfur oxides and nitrogen oxides remaining in the exhaust gas are neutralized and fine particulate soot and carbon dioxide are generated. Be captured. The sprayed aqueous base solution is returned to the aqueous base solution tank 89 via the aqueous base solution return pipe 95, and is filtered by diatomaceous earth of a precoat filter installed in the aqueous base solution tank 89.
[0039]
In the filtration with the diatomaceous earth of the precoat filter, the harmful substances remaining in the exhaust gas, the salt formed by the neutralization reaction by spraying the aqueous base solution from the spray nozzle 93, and the spray of the aqueous base solution from the spray nozzle 93 are used. The captured fine particulate soot and the like are captured. The clean exhaust gas purified by the gas washer 88 is sucked by the suction blower 97 through the exhaust pipe 96 and discharged from the chimney 98 to the atmosphere. Since the diatomaceous earth of the precoat filter is melt-processed later, secondary adverse effects on public health, the natural environment, and the like are also prevented.
[0040]
The aqueous base solution sprayed from the spray nozzle 93 circulates between the aqueous base solution tank 89 and the gas washer 88, and the dirt is filtered by a precoat filter in the aqueous base solution tank 89, and the concentration is automatically measured. And it is finally used as an aqueous base solution of the emulsion. For this reason, in the equipment of the present embodiment, no process wastewater is discharged outside.
[0041]
In the above embodiment, as shown in FIG. 1, the secondary combustion furnace 46 is simply hollow, and combustible waste and the like burn in this hollow. However, it is also possible to provide a heat storage tank in the secondary combustion furnace, provide a spiral flow path around the heat storage tank, and burn combustible waste and the like in the spiral flow path. In this case, the temperature of the combustible waste and the like is maintained in the range of about 1300 to 1600 ° C., generally about 1500 ° C. by the heat storage effect of the heat storage tank, and the secondary combustion is performed by the spiral flow path. Long residence time of combustible waste etc. in the furnace. As a result, combustible waste is burned in a state closer to complete combustion.
[0042]
It is generally considered that when the temperature in the combustion furnace is about 1500 ° C. or more, the furnace wall is severely damaged and cannot withstand long-time operation. However, it is possible to withstand temperatures up to about 2200 ° C. by applying an antioxidant to the furnace wall.
[0043]
In the above-described embodiment, the base in powder form is sent from the measuring equipment 19 and the feeder 21 and mixed and stirred with the combustible waste by the mixing and stirring device 17. Is converted into an emulsion containing a 60% by mass aqueous base solution together with fuel oil in a water 60% emulsion production machine 42. However, it is not always necessary that both the combustible waste and the emulsion contain a base, and only one of them may contain a base, and the mass ratio of the aqueous base solution in the emulsion is also 40 to 80. %.
[0044]
Furthermore, even if neither the combustible waste nor the emulsion contains a base, the combustible waste burns in a state close to complete combustion, thereby preventing the generation of dioxin. It is difficult to form a partial high-temperature region in the inside and the secondary combustion furnace 46, and the supply amount of air from the outside may be 1/25 or less of the normal combustion, so that generation of nitrogen oxides is prevented. In this case, too, the mass ratio of water in the emulsion is set to 40 to 80 in order to increase the degree of complete combustion, effectively prevent the formation of a partial high-temperature region, and reduce the amount of air supplied from the outside. %.
[0045]
【The invention's effect】
In the method for incinerating combustible waste according to claims 1 and 2, benzene nuclei are extremely unlikely to be formed, and chlorine gas due to chlorine separated from combustible waste is neutralized with a base to precipitate as a salt. The generation of dioxin during incineration is prevented. In addition, chlorine separated from combustible waste, chlorine gas by sulfur and sulfur oxides, and nitrogen oxides generated by combustion are neutralized with bases and precipitated as salts, so harmful substances are removed during incineration. . In addition, the stored energy of combustible waste is effectively extracted. Therefore, the flammable waste can be incinerated while preventing adverse effects on public health, the natural environment, and the like, and effectively using the energy possessed by the flammable waste.
[0046]
In the method for incinerating combustible waste according to claim 3, since benzene nuclei are extremely unlikely to be formed, generation of dioxin during incineration is prevented. In addition, since nitrogen oxides generated during combustion are hardly generated, generation of nitrogen oxides during incineration is prevented. In addition, the stored energy of combustible waste is effectively extracted. Therefore, flammable waste can be incinerated while preventing adverse effects on public health, the natural environment, and the like, and effectively utilizing the energy possessed by the flammable waste.
[0047]
In the method for incinerating combustible waste according to claims 4 and 5, since benzene nuclei are less likely to be formed, the generation of dioxin during incineration is more effectively prevented. In addition, the separation of chlorine and sulfur from combustible waste is promoted, and the precipitation of salts due to the neutralization reaction of chlorine gas and sulfur oxides with the base is promoted, so that harmful substances can be removed during incineration. More effectively done. In addition, the stored energy of combustible waste is more effectively extracted. Therefore, flammable waste can be incinerated while preventing adverse effects on public health, the natural environment, and the like more effectively, and using the stored energy of flammable waste more effectively.
[Brief description of the drawings]
FIG. 1 is a schematic view of an apparatus for carrying out an embodiment of the present invention.
[Explanation of symbols]
12 crusher, 14 crusher, 17 mixing and stirring device, 19 weighing equipment, 23 primary combustion furnace (first area), 26 fuel oil storage tank, 42 water 60% emulsion production machine, 46… Secondary combustion furnace (second area), 69: base aqueous solution production apparatus, 77: heat exchanger

Claims (5)

Providing granular combustible waste;
Preparing an emulsion containing an aqueous base solution having a mass ratio of 40 to 80% and fuel oil;
Combusting the combustible waste and the emulsion in a mixed state. Providing a mixture comprising a particulate combustible waste and a powdered base,
Preparing an emulsion containing 40-80% by weight of water and fuel oil;
Combusting the mixture and the emulsion in a mixed state. Providing granular combustible waste;
Preparing an emulsion containing 40-80% by weight of water and fuel oil;
Combusting the combustible waste and the emulsion in a mixed state. The method for incinerating combustible waste according to any one of claims 1 to 3, further comprising a step of mixing the pulverized wood material with the combustible waste. Performing the combustion in a first region on the combustion start side and a second region on the combustion end side,
The incineration method of combustible waste according to any one of claims 1 to 4, wherein the combustion is performed in a spiral flow path around a heat storage tank in the second region.

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