JP2022103745A - Organic waste combustion treatment system and organic waste treatment method - Google Patents

Abstract

To provide an organic waste combustion treatment system that can make dioxins harmless even if dioxins are generated during incineration of waste and that can minimally reduce or clear an organic matter contained in waste by incineration treatment.SOLUTION: There is provided an organic waste combustion treatment system comprising: a primary unit 10 that heats charged organic waste to a temperature exceeding boiling points of substances constituting the charged organic waste, and pyrolyzes the organic matter to produce a solid residue mainly consisting of gas products, which are non-flammable gases other than dioxins, and carbon; a secondary unit 20 that retains the gas products generated by the primary unit 10 under high a temperature to re-pyrolyze the gas products so that they are made harmless (decomposed); and a tertiary unit 30 that rapidly cools the high-temperature gas made harmless by the secondary unit 20 with cooling water to suppress reproduction of harmful substances including dioxins.SELECTED DRAWING: Figure 1

Description

The present invention relates to an organic waste combustion treatment system and a method for treating organic waste.

For combustible waste discharged from ordinary households and businesses, it is common to collect the combustible waste collected by collection vehicles at an incinerator and incinerate a large amount of waste in one place. It is a proper disposal method. In addition, the unburned incineration ash generated by the incineration treatment is often treated by burying it in a dedicated treatment plant or the like.

However, when the object to be treated is burned at a high temperature using a combustion furnace or the like and incinerated, harmful gases such as dioxins are likely to be generated. In particular, when waste or the like is incinerated using a small combustion furnace, it is liable to be in an incomplete combustion state without being uniformly burned as a whole. As a result, a lot of bad odors, offensive odors, smoldering smoke, etc. may be generated, which causes a problem of causing trouble to the surroundings.

Therefore, in order to deal with the problems such as the generation of harmful gas and the generation of foul odor and offensive odor as described above, it has been proposed to incinerate by an appropriate treatment means (for example, Patent Document). See 1). In Patent Document 1, it is stated that the generation of harmful gas such as dioxin can be prevented by using a technical means for incinerating waste at a low temperature.

However, in the conventional small incinerator, the action of uniformly supplying air to the inside is not performed well, and in some parts it may burn at a high temperature, and in other parts it may be in a steamed state at a low temperature. In particular, dioxin is likely to be generated. Even when a method of low-temperature disposal in a steamed state is to be used in order to deal with the problem of generation of harmful gas as described above, a combustion method such as oxygen-free combustion cannot be easily realized. Actually detoxifying combustible waste uses a relatively troublesome treatment method, for example, the supply mechanism of the gas body used for combustion and the exhaust gas emission treatment method. Is often done. For this reason, it is considered that it is difficult to easily maintain and manage the device, and many problems that need to be solved remain.

Therefore, combustible waste is burned at a high temperature in the central part of the combustion part, and around the high temperature part, steaming is performed at a low temperature toward the outside, and in the low temperature area around the combustible waste, water is evaporated. In addition, the combustion efficiency can be improved by using the means for heat (combustion) treatment, the generation of harmful gas bodies such as dioxin can be prevented, and the combustible waste can be easily treated by using a small device. Devices have also been proposed (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-136249 Japanese Unexamined Patent Publication No. 2009-30877

However, the one described in Cited Document 2 is convenient in that respect because it is burned and discarded at a low temperature below the dioxin generation temperature, but the waste to be discarded is effective for low temperature combustion. There is a high possibility that a large amount of residue will be formed without being able to be treated effectively. Therefore, the problem cannot be solved in terms of incineration of waste, and there is a problem that it does not form a body as an incinerator.

The present invention has been made in view of the above-mentioned problems, and even if dioxin is generated during waste incineration, it can be detoxified, and it is particularly effective in treating the waste. Provided is an organic waste combustion treatment system and an organic waste treatment method capable of minimizing or eliminating organic substances contained in waste by incineration and minimizing the residue after incineration. The purpose is to do.

The organic waste combustion treatment system according to the present invention thermally decomposes organic substances by heating them to a temperature exceeding the boiling point of each substance constituting them, and is nonflammable other than dioxin. A primary device that produces a gas product that is a gas and a solid residue mainly composed of carbon,
A secondary device that detoxifies (decomposes) the gas product produced by the primary device by retaining it under high-temperature heating and thermally decomposing it again.
It is equipped with a tertiary device that rapidly cools the high-temperature gas that has been detoxified by the secondary device with cooling water and suppresses the regeneration of harmful substances including dioxins.
The cooling water used in the tertiary device is configured to be reused after the contaminants in the cooling water are removed by a filter, and the contaminants are returned to the primary device for reprocessing. It is characterized by what has been done.

Another aspect of the organic waste combustion treatment system according to the present invention is to generate a low oxygen concentration state in which the organic waste is less than the oxygen concentration (limit oxygen concentration) at which a combustion reaction occurs, supply ozone, and incinerate. A thermal decomposition device that constitutes a primary device and is provided with a thermal decomposition chamber that maintains environmental conditions below the annihilation temperature of solids due to vaporization or sublimation of organic waste.
A firing device constituting a secondary device provided with a firing chamber that exposes dioxin generated in the thermal decomposition chamber to a high temperature environment to burn it off and decompose it to make it harmless.
A cooling chamber in which a spiral thin tube through which cold water passes is installed and the vaporized calcined product generated in the calcining chamber is sent, and a discharge port for discharging the vaporized calcined product having a concentration below a predetermined concentration from this cooling chamber to the atmosphere. / Or a cooling device constituting the tertiary device provided with a return path for returning to the thermal decomposition chamber.
It is characterized by being equipped with.

Another aspect of the organic waste combustion treatment system according to the present invention is that the primary device is
A combustion (pyrolysis) furnace body with an opening in the upper center to put organic waste inside,
The heat source provided on the lower side or the bottom inside the combustion (pyrolysis) furnace body,
Dispersing means for evenly stirring the organic waste inside the combustion (pyrolysis) furnace body,
An ozone generator that supplies ozone to the combustion (pyrolysis) furnace body,
It is characterized by being equipped with.

In the organic waste combustion treatment system according to the present invention, the secondary devices form a pair with a slight gap between them and are continuously bent a plurality of times to form a continuous narrow flow. A plate-like body made of flat metal, which forms a long path and has an electric heating body stretched around in a plate facing the flow path, is provided, and the pair of plate-like bodies is formed of the gap. It is characterized by constituting a retention means for holding and exposing the gas product moving along the flow path in a temperature range of 850 ° C to 1000 ° C, which is higher than the temperature at which dioxin is produced.

The organic waste treatment system according to the present invention is characterized in that the oxygen concentration in the primary apparatus is in the range of 14 to 17%.

The organic waste treatment system according to the present invention is characterized in that the primary device, the secondary device, and the tertiary device are formed separately from each other, and the arrangement layout of each device can be changed according to the installation location. And.

In the method for treating organic waste according to the present invention, a combustion (thermal decomposition) furnace main body having an opening for injecting organic waste inside is provided in the upper center, and a heat source provided at the bottom of the combustion (thermal decomposition) furnace main body. And a dispersion means for evenly stirring the organic waste inside the combustion (thermal decomposition) furnace body, and an ozone generator connected to the combustion (thermal decomposition) furnace body to supply ozone. Organic waste is put into the primary device under low oxygen conditions and heated to a temperature that exceeds the boiling point of each substance constituting the organic waste, thereby thermally decomposing the organic material and other than dioxin. The first step of producing a gas product which is a non-combustible gas and a solid residue mainly composed of carbon, and
A pair is formed with a slight gap between them, and a narrow flow path that is continuously connected is formed long by bending it continuously multiple times, and an electric heating element is formed in a plate facing the flow path. The gas product, which is composed of a flat metal and moves along the flow path formed by the gap, is held in a temperature range of 850 ° C to 1000 ° C, which is higher than the temperature at which dioxin is produced. In the secondary device provided with a plate-like body constituting the staying means to be exposed, the second step of exposing the dioxin generated in the thermal decomposition chamber to a high temperature environment, burning it off, and decomposing it to make it harmless.
A cooling chamber in which a spiral thin tube through which cold water passes is installed and the vaporized calcined product generated in the calcining chamber of the secondary device is sent, and the vaporized calcined product having a concentration below a predetermined concentration is released from this cooling chamber to the atmosphere. A discharge port and / or a return path for returning to the thermal decomposition chamber are provided, and the high-temperature gas detoxified in the second step is rapidly cooled with cooling water to regenerate harmful substances including dioxin. It is characterized by having a third step of suppressing it.

According to the organic waste combustion treatment system of the present invention, even if dioxin is generated during waste incineration, it can be detoxified, and it is contained particularly in the waste by effective treatment of the waste. Organic substances can be reduced or eliminated to the minimum by incineration, and the residue after incineration can also be minimized.

It is a front view which shows the schematic structure of the organic waste combustion treatment system which concerns on embodiment of this invention. It is a top view which shows the schematic structure of the organic waste combustion treatment system which concerns on embodiment of this invention. It is a perspective view which shows the schematic structure of the dispersion apparatus in the primary apparatus of the organic waste combustion treatment system which concerns on embodiment of this invention. (A) is a perspective view showing a diffusion cage of an organic waste combustion treatment system according to an embodiment of the present invention, and (B) is a broken view of a main part thereof. It is a perspective view which shows the schematic structure of the thermal decomposition chamber in the secondary apparatus of the organic waste combustion treatment system which concerns on embodiment of this invention. It is a principle diagram which shows the schematic structure in the tertiary apparatus of the organic waste combustion treatment system which concerns on embodiment of this invention.

The gist of the present invention is a gas product which is a non-combustible gas other than dioxin by thermally decomposing organic waste by heating the organic waste to be charged to a temperature exceeding the boiling point of each substance constituting the waste. A primary device that produces a solid residue mainly composed of carbon, and a secondary device that detoxifies (decomposes) the gas product produced by the primary device by retaining it under high-temperature heating and pyrolyzing it again. It is equipped with a tertiary device that rapidly cools the high-temperature gas that has been detoxified by the secondary device with cooling water and suppresses the regeneration of harmful substances including dioxin, and the cooling water used in the tertiary device is filtered. It is characterized in that it is reused after the contaminants of the cooling water are removed by the vessel, and the contaminants are returned to the primary device for retreatment. As a result, even if dioxin is generated during waste incineration, it can be detoxified, and the organic matter contained in the waste is incinerated, specifically, heat by effective treatment of the waste. The aim is to provide an organic waste combustion treatment system that can be minimized or eliminated by decomposition and can also minimize the residue after incineration.

Hereinafter, embodiments of the organic waste combustion treatment system according to the present invention will be described with reference to the drawings. Further, in each figure used in this description, XYZ three-dimensional Cartesian coordinates orthogonal to each other are used in order to clarify the arrangement state of each device. In this three-dimensional coordinate, it is displayed in a right-handed system, but the origin position is not set to a specific place.

<Embodiment>
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 show a schematic external front view and a schematic external plan view showing the organic waste combustion treatment system 1 according to the first embodiment of the present invention.
The organic waste combustion treatment system 1 according to the present embodiment includes a primary device 10, a secondary device 20, and a tertiary device 30 as a schematic configuration, and the primary device 10 and the secondary device 20 are provided. And between the secondary device 20 and the tertiary device 30. In this embodiment, in order to prevent the gas product generated in each secondary device from flowing back to the original device side, although not shown in FIGS. 1 and 2, a check valve or the like is used. Backflow prevention means are installed in the ventilation pipes P1 and P2 (or outlets or inlets of each device not shown) that communicate between the devices. Further, in the present invention, as another aspect, the pressure inside each secondary device may be controlled and adjusted so as not to cause backflow due to the differential pressure (for example, primary device internal pressure> secondary device internal pressure>. Internal pressure of the tertiary device).
[Configuration of organic waste combustion treatment system]

・ About primary equipment:
The primary device 10 thermally decomposes the organic waste by heating the organic waste to be charged to a temperature exceeding the boiling point of each substance constituting the waste, and produces a gas which is a nonflammable gas other than dioxin. It produces solid residues mainly composed of substances and carbon. More specifically, the primary apparatus 10 generates a low oxygen concentration state in which the organic waste causes a combustion reaction to be lower than the oxygen concentration (limit oxygen concentration) _, supplies ozone (O3), and incinerates the primary device 10. A primary device (hereinafter referred to as "thermal decomposition device 10") is a thermal decomposition device provided with a thermal decomposition chamber that maintains environmental conditions below the temperature at which solids disappear due to vaporization or sublimation of organic waste. Is called). Further, in the pyrolysis device 10, an ozone generator 40 is installed nearby in order to supply the above-mentioned ozone, and the ozone is supplied to the inside of the pyrolysis device 10 via the supply pipe 41. ing. Here, the organic waste refers to waste containing organic substances, and does not mean that it does not contain any inorganic substances or metals.

The pyrolysis apparatus 10 includes a combustion (pyrolysis) furnace main body (hereinafter referred to as "furnace main body 11") provided with an opening 11A for injecting organic waste into the upper center, and a bottom portion inside the furnace main body 11. It is provided with a heat source 12 provided on the side, a dispersion means 13 for evenly stirring organic waste inside the furnace body 11, and the above-mentioned ozone generator 40 for supplying ozone to the furnace body 11. In addition to the heat source 12, a heat source device 14 is further installed inside the diffusion cage 42, which will be described later, in the furnace body 11, so that the temperature described later can be reliably secured.

The furnace body 11 has a substantially hollow cylindrical shape or a box shape, and in particular, since the inside may be exposed to a high temperature, it is made of a heat-resistant material that can withstand the high temperature. Further, since the opening 11A is opened only when the dominant waste is put in, it is normally closed by the lid 11B during combustion, and is not destroyed by the pressure inside the high pressure or jumps out. As with the furnace body 11, it is made of a robust material and is configured so that it can be firmly fixed by a fixing means (not shown).

The heat source 12 can use various heating means that are heated by electric power supplied from the outside to dissipate heat. It is arranged.

As shown in FIG. 3, the dispersion means 13 is made of a heat-resistant metal in the case of the present embodiment, and for example, the central body 13A having a substantially conical shape (or a polygonal pyramid shape such as a quadrangular pyramid shape) at the central portion. And the radiator 13B extending radially from the central body 13A and having a terminal portion attached to the inner wall surface of the furnace main body 11. Moreover, each member constituting the dispersion means is made of a highly smooth material so that the organic waste that is thrown in and dropped off is not locked.

The central body 13A is installed so as to be arranged just below the opening 11A inside the furnace main body 11. By forming the central body 13A into a substantially conical shape (or a polygonal pyramid shape such as a quadrangular pyramid shape) in this way, the organic waste input from the opening 11A directly above is dispersed in the periphery. As a result, the organic waste to be thrown in is prevented from being concentrated and accumulated in the center of the main body 11.

The radial body 13B is for supporting the central body 13A, and is composed of a substantially triangular cross section extending from the central body 13A around a large number (at least two or three or more). Each radial body 13B is also configured so that the central top is at an acute angle, so that organic waste introduced from the opening is prevented from being locked and accumulated on the radial body 13B. It has become.

In the case of the present embodiment, as shown in FIG. 1, the heat source device 14 uses an appropriate material such as a heat-resistant metal or ceramics whose main body 12A can withstand high heat, and has a hollow substantially conical cone shape (or a hollow pyramidal trapezoidal shape). The top and bottom are open. A heating element (not shown) is provided on the outer peripheral surface (not shown) of the main body 12A to generate heat by being energized inside. Inside the furnace body 11 heated by the heat source 12, the operating temperature when the heat source 12 is installed is at the bottom of the inside of the furnace body 12A where the heat source 12 is installed, for example, 850 when the heat source 12 is in a stable operating state. Hold at ° C or higher. As a result, the organic waste is heated to a temperature exceeding the boiling point of each substance constituting the organic waste, and thermal decomposition is generated instead of combustion.

The ozone generator 40 is for realizing and promoting thermal decomposition of the input organic waste, not combustion by oxygen bonding, and in the present embodiment, the inside of the furnace main body 11 is via a supply pipe 41. It is connected and communicated with the diffusion basket 42 arranged in the center. The ozone generator 40 supplies the generated ozone to the furnace body 11 to relatively reduce the oxygen concentration inside the furnace body 11, but the pressure is higher than the internal pressure p1 of the furnace body 11. It is pressurized to the state and prevents various gases generated in the furnace body 11 from entering the ozone generator 40.

As shown in FIG. 4, the diffusion cage 42 is formed of a substantially box-shaped structure having an opening 42A on both the upper surface and the side surface in order to form an inlet for oxygen (O ₂ ) to enter. A large number of pipes 43 for ejecting ozone ₍ O3) sent from the ozone generator 40 from the fine holes 43A are arranged inside the structure. As a result, an oxygen concentration atmosphere equal to or lower than the critical oxygen concentration can be realized, and the thermal decomposition reaction can be reliably performed. Since the diffusion cage 42 is installed in the center of the inside of the furnace main body 11, it may be arranged in a suspended state by a fixing means (not shown), but each radial body 13B of the above-mentioned dispersion means 13 is flat. It may be hung from the bottom with a plurality of sturdy and heat-resistant fishing members (not shown).

In the present embodiment, the ozone generator 40 is configured to suppress the generation of dioxins by promoting thermal decomposition, but an inert gas may be supplied instead of ozone. The low oxygen concentration inside the furnace body 11 in the present embodiment is set and maintained at 14% to 17%, but the present invention is not particularly limited to this concentration, and the same effect can be obtained. If so, that's fine.

・ About secondary equipment:
The secondary device 20 takes in a gas containing dioxin remaining without being thermally decomposed in the primary device 10 or various gas products generated (for example, NH ₄ , NO ₂ , etc.) and retains them under high temperature heating. By thermally decomposing it again, it is detoxified (decomposed). In other words, the secondary device 20 exposes the dioxin produced in the furnace body 11 constituting the thermal decomposition chamber 21 which is the primary device 10 or the dioxin contained in the generated gas product to a high temperature environment. It is intended to be burnt off, and is provided with a firing chamber that is pyrolyzed again to make it harmless.

In the present embodiment, as shown in FIG. 5, a large number of plate-shaped bodies 22 are arranged inside the combustion chamber 21 along the X direction. The plate-shaped bodies 22 are paired with a slight gap between them, and are formed by being continuously bent into ninety-nine articles a plurality of times to form a long continuous narrow flow path. There is.

Further, the plate-shaped body 22 is made of a flat plate-shaped metal, and an electric heating body is stretched around the plate facing the flow path. A heating element (not shown) is embedded in the plate-shaped body 22 and the ventilation member 23 in the combustion chamber 21. This heating element is electrically connected to an external power source and energized, and the Joule heat generated by the heating element maintains the temperature inside the combustion chamber 21 at a high temperature of 850-1000 ° C, which exceeds the temperature at which dioxin is produced. It has become so.

Further, in each passage constituting the gap between the plate-shaped bodies 22, mesh-like fine particles such as punching metal having a large number of small holes opened so as to diagonally cross the flow of various gas products. Vent members 23 (eg, stainless steel SUS3016, etc.) are formed in a zigzag arrangement to increase the contact area for dioxin in the passing gas product.

In the combustion chamber 21, when the gas remaining without being thermally decomposed by the primary device 10 or the generated gas product is sent, the combustion chamber 21 is heated to a high temperature by passing through a large number of passages and is thermally decomposed again. That is, the plate-shaped bodies 22 paired with each other hold and expose the gas product moving along the flow path formed by the gap in a temperature range of 850 ° C to 1000 ° C, which exceeds the temperature at which dioxin is produced. To configure. Therefore, in particular, in the present invention, by providing a small hole in the ventilation member, it is possible to gain a longer time to be exposed to heating in the passage of the gas passing through each passage, and the thermal decomposition time can be increased accordingly. Can be extended.

Dioxins are pyrolyzed again to be detoxified (detoxified) by being exposed to high temperature heating in the combustion chamber 21 for a long time, and this detoxified decomposition product is used as the next tertiary device 30. Is sent to.

・ About the tertiary device 30:
The tertiary device 30 rapidly cools the high-temperature gas detoxified by the secondary device 20 with cooling water to suppress / prevent the regeneration of harmful substances including dioxins.

As shown in FIG. 6, in the tertiary device 30 of the present embodiment, as shown in FIG. 6, a spiral thin tube 32 for passing cold water is installed around the inside or inside of the wall surface of the device main body 31 (hereinafter referred to as a cooling chamber 31). There is. When the vaporized calcined product generated in the calcined chamber 21 of the secondary device 20 is sent into the cooling chamber 31, a discharge port 33 for discharging the vaporized calcined product having a concentration of a predetermined concentration or less from the inside of the cooling chamber 31 to the atmosphere is provided. It is provided. In the present invention, the detoxified gas detoxified in the cooling chamber 31 and released from the discharge port 33 and the other residues are liquefied, and a liquid containing contaminants remaining at the bottom of the cooling chamber 31. Hazardous substances (hereinafter referred to as "liquid residues") may be generated. Therefore, in case this latter occurs, a return path (not shown) may be provided between the bottom of the cooling chamber 31 and the primary device 10. With such a configuration, the liquid mixed with the harmful substances remaining on the bottom may be returned to the primary device 10 and the same treatment may be performed again.

In the tertiary device 30, the high-temperature gas detoxified by the secondary device 20 is rapidly cooled with cooling water to suppress the regeneration of various harmful substances including dioxins. In particular, the temperature is kept at a low temperature at which there is no risk of resynthesis (denovo reaction) of dioxins, that is, below 200 ° C. At this time, the detoxified gas having a concentration equal to or less than the legally regulated concentration is discarded from the upper exhaust pipe 32, and the liquefied residue is filtered by a filter (not shown).

That is, the harmful substances remaining in the liquid after being filtered by the filter (not shown) are refluxed and vaporized again to the primary device 10 via the reflux pipe (not shown), and the treatment from the beginning is repeated again. On the other hand, a liquid mixed with a liquid residue which is a residue that has been liquefied and accumulated at the bottom of the cooling chamber 31 is sorted by remaining in a filter provided in a filter (not shown). Then, when the contaminants remaining in the filter have accumulated to some extent, the filter is taken out together with the filter and put into the furnace body 11 of the primary device for reprocessing, so that the filter is configured with a cassette type filter attached.

On the other hand, the cooling water used in the tertiary device 30 may be partially steam in the thin tube 32 on the terminal side, but this cooling water or steam is reused via the pump P. If the cooling water is contaminated, a filter 34 dedicated to the cooling water is installed in a part of the flow path of the thin tube 32 to purify after the contaminants in the steam are removed. The cooling water is recirculated to the thin tube 32 again.

Further, with respect to the cooling water, the contaminants that are mixed in the cooling water and remain in the filter provided in the filter 34 have the same configuration as the filter for liquids containing the liquefied harmful substances as a residue. It may be removed. That is, when the contaminants have accumulated in the filter to some extent, the entire filter may be taken out and charged into the furnace body 11 of the primary device 10 for reprocessing, so that the filter may be configured with a cassette type filter attached. Further, the water vapor generated inside the tertiary device 30 may be sent to the turbine side (not shown) and used for power generation by the turbine.

[Action and effect]
As described above, according to the present embodiment, the primary device 10 and the secondary device 20 theoretically eliminate organic waste other than the inorganic substances contained in the organic waste. Therefore, for example, if it is adopted in an industrial waste treatment center, the generation of dioxins associated with organic waste treatment can be dramatically suppressed, and it can contribute to the conservation of the global environment. It is convenient.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiment, and various modifications and variations are made within the scope of the gist of the present invention described in the claims. It can be changed.
For example, as an alternative means of the ozone generator, a plasma generator, generation by spatial discharge when an alternating current is applied between electrodes, or other appropriate means are possible. Further, when the organic waste is decomposed by the heat branch, the generation of harmful gas can be suppressed by appropriately adding a chemical to the waste such as vinyl chloride. Therefore, the above-mentioned chemical is used. It is preferable to add such as.

1 Organic waste combustion treatment system 10 Primary equipment 11 Combustion (pyrolysis) Furnace body (furnace body)
11A Opening 11B Lid 12 Heat source 13 Dispersion means 13A Central body 13B Radiator 14 Heat source device 20 Secondary device 21 Thermal decomposition chamber 22 Plate-like body 23 Ventilation member 30 Tertiary device 31 Cooling chamber 32 Thin tube 33 Discharge port 34 Filter 42 Diffusion cage 42A Opening 43 Piping 43A Hole P1, P2 Ventilation pipe

Claims (7)

By heating the organic waste to be charged to a temperature that exceeds the boiling point of each substance that composes it, the organic matter is thermally decomposed and mainly composed of gas products and carbon, which are nonflammable gases other than dioxin. A primary device that produces solid residues,
A secondary device that detoxifies (decomposes) the gas product produced by the primary device by retaining it under high-temperature heating and thermally decomposing it again.
It is equipped with a tertiary device that rapidly cools the high-temperature gas that has been detoxified by the secondary device with cooling water and suppresses the regeneration of harmful substances including dioxins.
The cooling water used in the tertiary device is configured to be reused after the contaminants in the cooling water are removed by a filter, and the contaminants are returned to the primary device for retreatment. An (organic) waste decomposition system characterized by the fact that it has been done. Organic waste produces a low oxygen concentration state below the oxygen concentration (limit oxygen concentration) that causes a combustion reaction, supplies ozone, and is below the temperature at which solids disappear due to vaporization or sublimation of organic waste to be incinerated. A pyrolysis device that constitutes a primary device and has a pyrolysis chamber that maintains the environmental conditions of
A firing device constituting a secondary device provided with a firing chamber that exposes dioxin generated in the thermal decomposition chamber to a high temperature environment to burn it off and decompose it to make it harmless.
A cooling chamber in which a spiral thin tube through which cold water passes is installed and the vaporized calcined product generated in the calcining chamber is sent, and a discharge port for discharging the vaporized calcined product having a concentration below a predetermined concentration from this cooling chamber to the atmosphere. / Or a cooling device constituting the tertiary device provided with a return path for returning to the thermal decomposition chamber.
An organic waste combustion treatment system characterized by being equipped with. The primary device is
A combustion (pyrolysis) furnace body with an opening in the upper center to put organic waste inside,
The heat source provided on the lower side or the bottom side inside the combustion (pyrolysis) furnace body,
Dispersing means for evenly stirring the organic waste inside the combustion (pyrolysis) furnace body,
An ozone generator that supplies ozone to the combustion (pyrolysis) furnace body,
The organic waste combustion treatment system according to claim 1 or 2, wherein the system is provided with. The secondary device is
A pair is formed with a slight gap between them, and a narrow flow path that is continuously connected is formed long by being formed by being continuously bent multiple times, and an electric heating element is formed in a plate facing the flow path. It is equipped with a plate-shaped body made of flat metal, which is stretched around.
The paired plate-like body provides a retention means for holding and exposing the gas product moving along the flow path formed by the gap in a temperature range of 850 ° C to 1000 ° C, which exceeds the temperature at which dioxin is produced. The organic waste combustion treatment system according to any one of claims 1 to 3, wherein the organic waste combustion treatment system is configured. The organic waste combustion treatment system according to claim 2, wherein the oxygen concentration in the primary device is in the range of 14 to 17%. The invention according to claim 1 to 5, wherein the primary device, the secondary device, and the tertiary device are formed separately, and the arrangement layout of each device can be changed according to the installation location. Organic waste treatment system.

A combustion (pyrolysis) furnace body provided with an opening for injecting organic waste into the center, a heat source provided at the bottom of the combustion (pyrolysis) furnace body, and the inside of the combustion (pyrolysis) furnace body. The organic waste is placed under low oxygen conditions in a primary device provided with a dispersion means for evenly stirring the organic waste and an ozone generator connected to the combustion (pyrolysis) furnace body to supply ozone. Then, by adding and heating to a temperature exceeding the boiling point of each substance constituting the organic waste, the organic substance is thermally decomposed and mainly composed of gas products and carbon which are nonflammable gases other than dioxin. The first step of producing the solid residue and
A pair is formed with a slight gap between them, and a narrow flow path that is continuously connected is formed long by bending it continuously multiple times, and an electric heating element is formed in a plate facing the flow path. The gas product, which is composed of a flat metal and moves along the flow path formed by the gap, is held in a temperature range of 850 ° C to 1000 ° C, which is higher than the temperature at which dioxin is produced. In the secondary device provided with a plate-like body constituting the staying means to be exposed, the second step of exposing the dioxin generated in the thermal decomposition chamber to a high temperature environment, burning it off, and decomposing it to make it harmless.
A cooling chamber in which a spiral thin tube through which cold water passes is installed and the vaporized calcined product generated in the calcining chamber of the secondary device is sent, and the vaporized calcined product having a concentration below a predetermined concentration is released from this cooling chamber to the atmosphere. A discharge port and / or a return path for returning to the thermal decomposition chamber are provided, and the high-temperature gas detoxified in the second step is rapidly cooled with cooling water to regenerate harmful substances including dioxin. The third step to suppress and
A method of treating organic waste, which is characterized by being equipped with.

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