JP2003056823A - Combustion method for substance to be incinerated, and incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion method and a combustion furnace wherein dioxin can be effectively suppressed from being produced by raising the temperature of a substance to be combusted after ignition to 850 deg.C or higher rapidly by supplying oxygen-enriched air into the combustion furnace before combustion is started. SOLUTION: An incinerator 1 comprises a gas storage tank 5 for storing therein an oxygen excess air, and a combustion furnace 1, to which the oxygen excess air is supplied from the gas storage tank 5, for combusting a substance to be incinerated. Hereby, after the oxygen-enriched air is supplied to the combustion furnace 1, the article introduced into the combustion furnace is combusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burning an incineration object and an incinerator, and more particularly, to supply an oxygen-enriched air at the start of combustion of the incineration object to promptly raise the combustion temperature to 850 degrees. The present invention relates to a combustion method and a combustion furnace that can raise the temperature to prevent the generation of dioxin.

[0002]

2. Description of the Related Art A conventional method of burning a burned material is to put the burned material into a combustion furnace through a door provided on a side surface of the combustion furnace, then close the door to ignite the burned material. The method of making it possible can be mentioned.

[0003]

It is well known that dioxins are generated when the temperature at which the material to be burned is burned is around 700 ° C. When the oxygen concentration of the air existing in the combustion furnace is as low as 20% or less, after ignition,
A lot of dioxins are generated when the temperature is raised to 850 ° C. The reason for this is that under a low oxygen concentration of 20% or less, the temperature in the combustion furnace where dioxin tends to be generated is 700 ° C. to the temperature at which complete combustion is possible 8.
It is considered that it takes time to raise the temperature to 50 ° C. or higher.

In Japanese Patent Laid-Open No. 6-137537, exhaust gas containing combustible and harmful components discharged from a semiconductor manufacturing apparatus is diluted with an inert gas and then introduced into a combustion apparatus, and oxygen for auxiliary combustion is added to the combustion. Then, in decomposing and detoxifying the burnable harmful components, nitrogen for dilution and oxygen for combustion were obtained from a pressure fluctuation type adsorption separation device for separating oxygen and nitrogen in the air. It is disclosed that not only oxygen or nitrogen, which is a product of the pressure fluctuation type adsorption / separation device, but also conventionally discharged exhaust nitrogen or exhaust oxygen can be effectively used. However, in this publication, there is no problem regarding the problem that dioxin is generated due to the slow temperature rising rate during combustion, and the introduction of oxygen-enriched air through an oxygen-enriched membrane during combustion. Not paid attention.

According to Japanese Patent Laid-Open No. 9-4833, when it is judged that it is necessary to activate combustion depending on the combustion state, in addition to air, oxygen-enriched air is passed through an oxygen-enriched film or the like. It is described to be used to activate combustion. However, in this publication, similarly to the above, the problem that dioxin is generated due to the slow temperature rising rate at the time of combustion and the oxygen-enriched air at the “start of combustion” through the oxygen-enriched film etc. No attention has been paid to the input.

In Japanese Unexamined Patent Publication No. 9-26117, the ash discharged from the incinerator is received in an attached ash melting furnace while being kept at a high temperature, and oxygen or oxygen-rich air is blown into the ash, It is described that the ash is melted by high temperature combustion utilizing the residual heat and unburned carbon content of ash, and paragraph 0006 discloses that oxygen-rich air is obtained from an oxygen-enriched film. There is. Also, Japanese Patent Laid-Open No. 2000-213
No. 719 discloses that a waste combustion incinerator is divided into a primary combustion pyrolysis furnace and a secondary combustion melting furnace, and oxygen-enriched air is supplied to the secondary combustion melting furnace. There is a description that an oxygen enrichment module that selectively separates oxygen from the atmosphere is necessary to raise the temperature to 1200 ° C. or higher. However, similar to the above-mentioned publication, the problem that dioxin is generated because the temperature rising rate at the start of combustion is slow, and that the oxygen-enriched air is injected through the oxygen-enriched film at the start of combustion. No attention has been paid to such matters.

The present invention has been made to solve the above problems, and an object of the present invention is to supply oxygen-enriched air to a combustion furnace before the start of combustion so that the burned material can be quickly heated to 850 degrees or more after ignition. It is an object of the present invention to provide a combustion method and a combustion furnace therefor capable of effectively suppressing the generation of dioxin by raising the temperature.

[0008]

A method for burning an incineration object according to the present invention which solves the above-mentioned problems is to supply an oxygen-enriched air to a combustion furnace and then burn the incineration object put into the combustion furnace. Let

The oxygen-enriched air is supplied to the combustion furnace from a gas storage tank that stores the oxygen-enriched air.

The oxygen-enriched air stored in the gas storage tank is preferably supplied by an oxygen-enriching device.

The rate at which oxygen enriched air is fed from the oxygen enrichment device to the gas storage tank is preferably adjustable.

The rate at which the oxygen-enriched air is fed from the gas storage tank to the combustion furnace may be adjustable.

Oxygen-enriched air is supplied directly from the oxygen-enriching device to the combustion furnace.

In one embodiment, the incinerator is ignited after oxygen-enriched air is supplied to the combustion furnace.

The incinerator for incinerator according to the present invention, which solves the above problems, is provided with a gas storage tank for storing oxygen-enriched air, and oxygen-enriched air is supplied from the gas storage tank while incinerating the incinerator. And a combustion furnace for burning.

It is preferable to further include an oxygen enriching device for supplying oxygen enriched air to the gas storage tank.

The combustion furnace may include an outer door provided on the outer surface of the incinerator and an inner door provided inside the incinerator.

The outer door and the inner door are preferably linked so that the inner door is closed when the outer door is opened.

The outer door and the inner door may be interlocked so that the inner door is opened when the outer door is closed.

The incinerator for incineration according to the present invention which solves the above-mentioned problems has an oxygen-enriched membrane unit that preferentially allows oxygen molecules in the air to pass therethrough, and a decompressor for sucking air through the oxygen-enriched membrane unit. And a pump, and oxygen-enriched air exhausted from the vacuum pump is preferably supplied.

A supply pipe for supplying the oxygen-enriched air exhausted from the decompression pump to the gas storage tank may be provided.

In another embodiment, it is preferable to provide a supply pipe for supplying the oxygen-enriched air exhausted from the decompression pump to the combustion furnace.

The oxygen-enriched membrane unit preferably has an oxygen-enriched membrane composed of a polymer obtained by reacting a vinyl group-containing polyorganosiloxane with a vinyl monomer.

The vinyl monomer is a styrene monomer.

The oxygen-enriched membrane unit comprises a polymer obtained by reacting a polyorganosiloxane containing a vinyl group with a vinyl monomer, a polymer of a fumarate ester or a copolymer of a fumarate ester and a vinyl monomer. It is preferable to have an oxygen-enriched film obtained by mixing

The oxygen-enriched membrane unit preferably comprises an oxygen-enriched membrane and a porous support plate on the surface of which the oxygen-enriched membrane is laminated.

The porous support plate is made of at least one of polyether sulfone and polysulfone.

A fan for delivering air to the oxygen-enriched membrane unit may be provided.

The oxygen-enriched membrane unit has a plurality of flat plate-shaped oxygen-enriched membrane modules arranged in parallel in the unit casing, and the oxygen-enriched membrane module is at least separated by a predetermined distance. It is equipped with two oxygen-enriched membranes and a thin tube connected to the void, and an in-unit drain tube connected to each thin tube is provided in the unit casing. Air is preferably sucked through the drain pipe and the narrow pipe in the unit.

A fan for exhausting the air in the oxygen enriched membrane unit is provided.

A filter is preferably provided on the front surface of the unit casing.

It is preferable that a plurality of flat plate oxygen-enriched membrane modules are arranged in parallel with the air flow in the unit casing.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

(Embodiment 1) FIG. 1 is a diagram showing an outline of one embodiment of the present invention. The incinerator 7 shown in FIG. 1 is equipped with a combustion furnace 1 in which an input burned material (not shown) burns. Further, the incinerator 7 is equipped with an oxygen enrichment device 6 capable of obtaining oxygen enriched air from the outside air. The oxygen-enriched air obtained by the oxygen-enriching device 6 is stored in the gas storage tank 5 connected to the oxygen-enriching device 6 via the pipe 61. The gas storage tank 5 and the combustion furnace 1 are connected via a pipe 51. In addition,
An object to be burned (not shown) on any one surface of the combustion furnace 1.
Door 11 that can be opened when the fuel is charged into the combustion furnace 1
And a chimney 8 for discharging the gas generated when the burned material burns from the combustion furnace 1 projects from any one surface of the combustion furnace 1.

A method of burning an incineration object using such an incinerator 7 will be described. First, an object to be burned (not shown) is put into the combustion furnace through an outer door 11 provided in the combustion furnace 1. In the first embodiment, before igniting the burned material, the oxygen-enriched air obtained from the oxygen-enriching device 6 is temporarily stored in the gas storage tank 5 for storing the oxygen-enriched air in the combustion furnace 1 Supply in.

In the first embodiment, as described above, the oxygen-enriched air is supplied from the gas storage tank 5 into the combustion furnace 1 before ignition, so that the temperature of the burned material is promptly increased after ignition. The temperature can be raised to 850 degrees or more. Therefore, as compared with the conventional incinerator, the generation of dioxin can be effectively suppressed.

The oxygen-enriched air obtained by the oxygen-enriching device 6 is preferably temporarily stored in the gas storage tank 5 connected via the pipe 61 as described above.

As shown in FIG. 3 described later, the gas storage tank 5
Compared with the case where oxygen-enriched air is directly supplied to the combustion furnace 1 from the oxygen-enrichment device 6 without the intermediary of oxygen, the oxygen-enriched air can be temporarily stored in the gas storage tank 5 before being supplied to the combustion furnace 1. It is possible. When such a gas storage tank 5 is used, it is possible to add oxygen-enriched air stored in the gas storage tank 5 to the incinerator 7 immediately when it is desired. Here, consider a case where the combustion furnace 1 is not in operation. When the combustion furnace 1 is not operating (for example, at night), oxygen-enriched air is gradually stored in the gas storage tank 5 from the oxygen enrichment device 6 in preparation for burning the incineration object in the combustion furnace 1. Then, when the combustion furnace is operated next time (for example, the next morning), the incineration object can be smoothly burned in the combustion furnace 1. Further, even when the material to be incinerated is being burnt in the combustion furnace 1, the oxygen-enriched air supplied from the oxygen-enriching device 6 is stored in the gas storage tank 5 in preparation for the next combustion. As a result, the oxygen-enriched air can be supplied from the gas storage tank 5 into the combustion furnace 1 immediately after the combustion is completed. Therefore, the next combustion can be performed smoothly.

When such a gas storage tank 5 is used, unlike the large-sized oxygen enriching device, even if the oxygen-enriching device 6 has a low oxygen-enriched air supply capacity, the gas storage is little by little. Since the oxygen-enriched air can be stored in the tank 5 from the oxygen-enriching device 6, there is also an advantage that it does not need to be a large-sized oxygen-enriching device which requires labor for cost, installation place, and maintenance. Particularly, in the case as described in paragraph 0012, if oxygen-enriched air is stored in the gas storage tank 5 from the oxygen-enriching device 6, although a little at a time, a sufficient amount of oxygen-enriched air is needed (immediately before ignition). )
Can be supplied to the combustion furnace 1.

In the first embodiment, the oxygen-enriching device 6 is used to obtain oxygen-enriched air. As a means for obtaining oxygen-enriched air, it is conceivable to use an oxygen cylinder, oxygen PSA, etc., but when using an oxygen cylinder, it takes time and effort to replace the oxygen cylinder when the oxygen is exhausted. . When an oxygen PSA device that supplies oxygen-enriched air by using zeolite that adsorbs nitrogen molecules in the air is used, the oxygen PSA device is large and the oxygen contained in the generated oxygen-enriched air is large. There is a problem that the concentration is 90% or more, and the concentration is too high for oxygen-enriched air to be supplied to the incinerator 1, which is not appropriate. Although the detailed structure of the oxygen enriching device 6 and the detailed reason why the oxygen enriching device 6 is preferable will be described later, the oxygen-enriched air is enriched with oxygen because the oxygen-enriching device does not cause such trouble. It is preferably supplied by the device 6. A suitable concentration of oxygen in the oxygen-enriched air used in the present invention is from about 25% to about 40%, more suitably from about 30% to about 35%.

A valve 611 is preferably provided in the pipe 61 connecting between the oxygen enrichment device 6 and the gas storage tank 5. As shown in FIG. 1, the pipe 6 has a valve 6
By providing 11, the flow rate of sending the oxygen-enriched air produced by the oxygen-enriching device 6 to the gas storage tank 5 can be adjusted by the valve 611. Valve 611
May be directly attached to the oxygen enrichment device 6. The oxygen enriching device 6 may be constantly operated and oxygen-enriched air may be continuously supplied. The gas storage tank 5 may have a function of automatically discarding the oxygen-enriched air when the gas storage tank 5 for storing the obtained oxygen-enriched air is filled with the oxygen-enriched air.

A valve 511 is also preferably provided in the pipe 51 connecting the gas storage tank 5 and the incinerator 7. As shown in FIG. 1, by providing a valve 511 in the pipe 51, as described above, the gas storage tank 5
The oxygen-enriched air is stored in the combustion furnace 1, and when the oxygen-enriched air is needed in the combustion furnace 1, the valve 511 is opened to reliably supply the oxygen-enriched air into the combustion furnace 1. . By attaching the valve 511 to the pipe 51, it is possible to adjust the flow rate of the oxygen-enriched air stored in the gas storage tank 5 to the combustion furnace 1. This makes it possible to add oxygen-enriched air to the combustion furnace 1 at a required flow rate, and if the valve 511 is closed, the gas to be burned when the incinerator in the combustion furnace 1 is burning. Fresh oxygen-enriched air can be stored in the storage tank 5. Therefore, the oxygen-enriched air can be efficiently stored in the gas storage tank 5.

As shown in FIG. 2, the combustion furnace 1 is preferably provided with an outer door 11 and an inner door 12.
In this case, first, the outer door 11 provided in the combustion furnace is opened, and the material to be incinerated is put into the combustion furnace 1. The outer door 11 and the inner door 12 may be manually opened / closed, but may be automatically opened / closed.

In the first embodiment, the outer door 11 and the inner door 12 are interlocked so that the inner door 12 is closed when the outer door 11 is opened and the inner door 12 is opened when the outer door 11 is closed. Preferably. By doing so, since either the outer door 11 or the inner door 12 is always closed, the oxygen-enriched air stored in the combustion furnace 1 is prevented from leaking out from the combustion furnace 1 to the minimum. Can be suppressed. Therefore, even if the material to be incinerated is fed into the combustion furnace 1 after supplying the oxygen-enriched air into the combustion furnace 1, it is possible to effectively prevent the oxygen-enriched air from leaking out from the combustion furnace 1. .

Here, consider a case where both the outer door 11 and the inner door 12 are closed. Even when both the outer door 11 and the inner door 12 are closed, it is conceivable that some oxygen-enriched air may leak from around the doors. if,
If more than three doors are installed in the combustion furnace 1, it may be possible to minimize leakage of oxygen-enriched air from the ends of the doors. Therefore, the number of doors provided in the combustion furnace 1 is not limited to two, that is, the outer door 11 and the inner door 12, and more doors may be provided.

In the case of the incinerator 7 in which the inner door 12 is installed at a lower position than the outer door 11, the incinerator falls to the combustion furnace 1 by its own weight. More specifically, the material to be incinerated is loaded from the outer door 11 with the outer door 11 opened and the inner door 12 closed. In this state, the incinerated object hits the inner door 12 and stops,
Do not enter inside the combustion furnace 1 at the tip of the inner door 12.
After that, when the outer door 11 is closed, the inner door 12 is opened, so that the incineration objects stopped between the outer door 11 and the inner door 12 enter the inside of the combustion furnace 1. On the other hand, when the outer door 11 and the inner door 12 are located at the same height, the incinerator does not fall into the combustion furnace 1 by its own weight.

The outer door 11 may be provided on any one surface of the combustion furnace 1. However, as shown in FIG. The opened outer door 11 may be a double door, a right-sided door, a left-sided door, an upper-sided door, or a lower-sided door. Further, the outer door 11 and the inner door 12 may be shutters or sliding doors or lids as long as the sealability inside the combustion furnace is not impaired and no problem occurs during combustion.

Although not shown, the oxygen enrichment device 6 and the gas storage tank 5 may be integrated, and the integrated oxygen enrichment device and the gas storage tank may be connected to the combustion furnace 1 via a pipe. It does not matter, the oxygen enrichment device 6 and the gas storage tank 5
And may be built in the combustion furnace 1. And the combustion furnace
After the inside of 1 is filled with the oxygen-enriched air supplied from the gas storage tank 5, ignition is performed and combustion is started.

FIG. 4 shows an enlarged view of the oxygen enrichment device. The oxygen enrichment device 6 includes an oxygen-enriched membrane unit (hereinafter, may be simply referred to as “unit”) 2 that preferentially passes oxygen molecules in the air as compared with nitrogen molecules 2, and this unit 2
A vacuum pump 3 for sucking air through the chamber and heating the oxygen-enriched air obtained by the suction is built in. In addition, a pump is provided between the decompression pump 3 and the unit 2.
They are connected by a unit connecting pipe 31.

Since the decompression pump 3 tries to suck air through the unit 2, the pump-unit connecting pipe 31 connected to one end of the decompression pump 3 is in a decompressed state. Since the unit 2 is connected to the other end of the pump-unit connecting pipe 31, the air sent into the oxygen enriching device 6 by the fan 4 or the like provided in the oxygen enriching device 6 is not unit 2. To pass through to the decompression pump 3. The fan 4 may be omitted, but the air flow becomes smoother when the fan 4 is provided.

The unit 2 allows a relatively small molecule such as a nitrogen molecule, an oxygen molecule, a helium atom, a methane molecule, and a water molecule to permeate from its surface, and the pump-unit connecting pipe 3
These molecules are ejected to unit 1, but the rate at which these molecules permeate unit 2 is different for each molecule.

The detailed structure of the oxygen-enriched membrane unit 2 will be described later. As an example, while 1 part by mass of nitrogen molecules passes through the oxygen-enriched membrane unit 2,
About 2.5 parts by mass of oxygen molecules pass through the oxygen enriched membrane unit 2. Therefore, the air that has passed through the oxygen-enriched membrane unit 2 contains about 32% by mass of oxygen. Thus, the air that has passed through the oxygen-enriched membrane unit 2 (oxygen-enriched air) is rich in oxygen, unlike ordinary air. In the following description, the air that has not passed through the unit 2 will be referred to as “outside air” in order to make the distinction clear.

The oxygen-enriched air is sent to the decompression pump 3 via the pump-unit connecting pipe 31. As the decompression pump 3, a so-called vacuum pump that is generally commercially available can be used. Further, generally commercially available vacuum pumps have a built-in motor, and the oxygen-enriched air is warmed by the heat generated when the motor is driven.

As an example, the degree of pressure reduction of the pressure reducing pump 3 is set to 2.66 × 10 ⁴ Pa, and the outside air at a temperature of 7 ° C. and a humidity of 85% (water vapor pressure: about 8 × 10 ² Pa) is set to 250.
If taken in at a rate of 1 liter / minute, approximately 5 liters of oxygen-enriched air is sent from the unit 2 towards the vacuum pump 3. The remaining about 245 liters are discharged to the outside of the oxygen enrichment device 6.

This oxygen-enriched air contains about 32% by mass of oxygen and is warmed by the heat driven by the motor of the decompression pump 3, and the temperature is about 40 ° C. and the humidity is 100% (water vapor pressure: 7. (3 × 10 ³ Pa) oxygen-enriched air is discharged from the decompression pump 3 and supplied into the combustion furnace 1.

As described above, in the present invention, the air sent to the oxygen enrichment device 6 and passing through the oxygen enrichment membrane unit 2 toward the decompression pump 3 is discharged by the oxygen enrichment membrane unit 2. Since air rich in oxygen is supplied into the combustion furnace, the amount of oxygen in the combustion furnace can be kept constant.

The oxygen-enriched air may be directly exhausted from the decompression pump 3 (that is, the oxygen-enriched air may be directly supplied from the decompression pump 3 into the combustion furnace 1). Each element constituting the oxygen enrichment device 6 according to the present invention may be incorporated in the combustion furnace 1. This is because if it can be built in, there will be almost no problem with the installation location.

Next, the oxygen enriched membrane unit 2 will be described in detail. The oxygen-enriched membrane used in the oxygen-enriched membrane unit that preferentially passes oxygen molecules in the air as compared with nitrogen molecules is used as an oxygen-enriched membrane, which is obtained by reacting a vinyl group-containing polyorganosiloxane with a vinyl monomer. A non-porous membrane composed of a united body can be used.

Polyorganosiloxane containing a vinyl group is commercially available from Toray Silicone Co., Ltd. under the trade name "SH41".
It is available as "0". As the vinyl monomer, it is preferable to use a styrene monomer from the viewpoint of film strength and the like. Briefly explaining the manufacturing method of the film,
2,5-Dimethyl-2,5-di (tertiary butyl), which is obtained by dissolving polyorganosiloxane containing a vinyl group and a vinyl monomer in a solvent such as chlorobenzene and then available from NOF CORPORATION under the trade name "Perhexa 25B". A small amount of a peroxide such as peroxy) hexane is added and the radical polymerization reaction is carried out at a temperature of about 120 ° C. for about 12 hours. The precipitate is once washed with methanol or the like, dissolved in benzene, tetrahydrofuran is added, and then the solution is dropped on the water surface to form a film. In addition, in order to improve the amount of oxygen permeation, a benzene solution of the precipitate (a polymer of vinyl group-containing polyorganosiloxane and vinyl monomer) is added to a polymer of fumarate ester or a fumarate ester and vinyl monomer. Mixing with a copolymer is preferred.

The film thus obtained is very thin,
Since the strength is low, when the benzene solution is dropped onto the water surface to form a film, the strength of the film can be improved by laminating an oxygen-enriched film on a porous support plate having a thickness of about 50 μm. In addition, as a material of such a porous support plate, polyether sulfone or polysulfone is preferable because it is preferable that the porous support plate has air permeability that does not hinder gas molecules from permeating the oxygen-enriched membrane as much as possible. It is preferable. A porous support plate obtained by mixing polyether sulfone and polysulfone can also be used. The oxygen-enriched film may be laminated on only one side of the porous support plate, or may be laminated on both sides.

The oxygen enrichment device 6 according to the present invention is preferably equipped with a fan for sending air to the oxygen enrichment membrane unit 2. As shown in FIG. 4, this fan may be provided at a position where the outside air flows from the fan 4 toward the unit 2, or like a fan 29 provided at the rear part of the unit casing 24 as described later. To
It may be provided at a position where the outside air flowing through the unit 2 is exhausted.

Next, the internal structure of the oxygen enriched membrane unit 2 will be described. As shown in FIG. 5, the unit 2 has a unit casing (hereinafter sometimes simply referred to as “casing”) 24.
Each member to be described below is incorporated in the unit 4. A fan 29 is provided at a rear portion of the unit casing 24 so that outside air flows from the front portion to the rear portion of the unit casing 24 inside the casing 24. The casing 2 is used to remove dust in the outside air.
A filter 26 is provided at the front part of No. 4. Also,
In FIG. 5, the fan 29 is incorporated inside the unit casing 24, but the fan 29 may be provided outside the unit casing 24 as long as the air inside the unit 2 can be exhausted.

The air that has passed through the filter 26 is supplied to an oxygen-enriched membrane module (hereinafter sometimes simply referred to as “module”) 21. This oxygen enriched membrane module 21
As shown in FIG. 6, two oxygen-enriched films 22 are arranged in parallel with each other with a gap having a predetermined thickness. In order to maintain a void having a predetermined thickness, the two oxygen-enriched membranes are laminated on both sides of one porous support plate 23, respectively. A thin tube 28 is connected around the porous support plate 23. The periphery of the porous support plate 23 other than the location where the thin tube 28 is connected is sealed so that gas does not leak.

The description returns to FIG. A plurality of the flat plate-shaped modules 21 described above are arranged in parallel in the unit casing 24, and each thin tube 28 protruding from the periphery of each module 21 is connected to one in-unit drain tube 27. The in-unit drain pipe 27 is connected to the decompression pump 3.

The air supplied to the module 21 is sucked by the decompression pump 3, and supplied to the decompression pump 3 through the oxygen-enriched film 22, the porous support plate 23, the narrow pipe 28, and the in-unit drain pipe 27. In this way, the oxygen-enriched air is supplied to the decompression pump 3.

When such a unit 2 is used, since a plurality of modules 21 are provided, not only the oxygen-enriched air can be efficiently supplied to the decompression pump 3, but also the air is a flat module 21. On the other hand, since the air flows in a plane parallel direction (from the filter 26 to the fan 29 in FIG. 5), the air does not exert a strong force on the oxygen-enriched film, and the durability can be improved.

(Embodiment 2) Next, another embodiment 2 of the present invention will be described. The difference between the second embodiment and the above-described first embodiment is that in the second embodiment, as shown in FIG. 3, a gas is present between the oxygen enrichment device 6 and the combustion furnace 1. That is, the storage tank 5 and the pipe 51 are not installed. That is, the oxygen enrichment device 6 is connected to the combustion furnace 1 via the pipe 61. Other than this, it is basically the same as the first embodiment unless otherwise specified.

Also in the second embodiment, as described above, by supplying the oxygen-enriched air from the oxygen-enriching device 6 into the combustion furnace 1 before ignition, the temperature of the burned material is quickly increased after ignition. The temperature can be raised to 850 degrees or more. Therefore, as compared with the conventional incinerator, the generation of dioxin can be effectively suppressed.

[0069]

According to the present invention, since oxygen-enriched air is supplied to the combustion furnace before the combustion of the burned material is started, the burned material can be quickly heated to 850 degrees or more after ignition. As a result, a combustion method and a combustion furnace therefor capable of effectively suppressing the generation of dioxins are provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a combustion furnace 7.

FIG. 2 is a sectional view of a combustion furnace 7.

FIG. 3 is a schematic diagram of a combustion furnace 7.

FIG. 4 is a sectional view of the oxygen enrichment device 6.

FIG. 5 is a perspective view of the internal structure of the oxygen-enriched membrane unit 2.

FIG. 6 is a cross-sectional view of the oxygen enriched membrane module 21.

[Explanation of symbols]

1: Combustion furnace 11: Outer door 12: Inner door 2: Oxygen enriched membrane unit 21: Oxygen-enriched membrane module 22: Oxygen-enriched film 23: Porous support plate 24: Unit casing 26: Filter 27: Drain pipe in unit 28: Capillary 29: Fan 3: Decompression pump 31: Pump-unit connecting pipe 4: Fan 5: Gas storage tank 51: Tube 511: valve 6: Oxygen enrichment device 61: Tube 62: tube 611: valve 7: Incinerator 8: chimney

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuichi Yamashita             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Nobuyasu Nishikawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 3K065 AA18 AB01 AC01 BA04 EA07                       EA14 EA52 GA13 GA31

Claims (25)

[Claims] 1. A method for burning an incineration object, which comprises injecting oxygen-enriched air into a combustion furnace and then burning the incineration object put into the combustion furnace. 2. The oxygen enriched air is supplied to the combustion furnace from a gas storage tank which stores the oxygen enriched air.
The method for burning an incineration object according to. 3. The method for burning a combusted material according to claim 2, wherein the oxygen-enriched air stored in the gas storage tank is supplied from an oxygen-enriching device. 4. The method for burning a combusted material according to claim 2, wherein the rate at which the oxygen-enriched air is supplied from the oxygen-enriching device to the gas storage tank is adjustable. 5. The method for burning a combusted material according to claim 2, wherein the rate at which the oxygen-enriched air is supplied from the gas storage tank to the combustion furnace is adjustable. 6. The method for combusting a combusted material according to claim 1, wherein the oxygen-enriched air is directly supplied to the combustion furnace from an oxygen-enriching device. 7. The method of burning a burned material according to any one of claims 1 to 6, wherein the burned material is ignited after oxygen-enriched air is supplied to the combustion furnace. 8. An incinerator comprising a gas storage tank for storing oxygen-enriched air, and a combustion furnace which is supplied with the oxygen-enriched air from the gas storage tank and burns an incinerator. 9. The incinerator according to claim 8, further comprising an oxygen enrichment device for supplying oxygen enriched air to the gas storage tank. 10. The combustion furnace according to claim 8, further comprising an outer door provided on an outer surface of the incinerator and an inner door provided inside the incinerator. Incinerator. 11. The outer door and the inner door are interlocked so that the inner door is closed when the outer door is opened.
Incinerator described in. 12. The outer door and the inner door work together so that the inner door opens when the outer door closes.
Incinerator described in. 13. An oxygen enrichment membrane unit for preferentially passing oxygen molecules in air, and a decompression pump for sucking the air through the oxygen enrichment membrane unit, and exhaust from the decompression pump. The incinerator according to claim 8, wherein the oxygen-enriched air that has been generated is supplied. 14. The incinerator according to claim 13, further comprising a supply pipe for supplying the oxygen-enriched air exhausted from the decompression pump to a gas storage tank. 15. The incinerator according to claim 13, further comprising a supply pipe for supplying the oxygen-enriched air exhausted from the decompression pump to a combustion furnace. 16. The incineration according to claim 15, wherein the oxygen-enriched membrane unit has an oxygen-enriched membrane composed of a polymer obtained by reacting a vinyl group-containing polyorganosiloxane and a vinyl monomer. Furnace. 17. The incinerator according to claim 16, wherein the vinyl monomer is a styrene monomer. 18. A polymer obtained by reacting a polyorganosiloxane containing a vinyl group with a vinyl monomer in the oxygen-enriched membrane unit, and a polymer of a fumarate ester or a fumarate ester and a vinyl monomer. The incinerator according to claim 13, which has an oxygen-enriched film formed by mixing with a polymer. 19. The oxygen enriched membrane unit comprises the oxygen enriched membrane and a porous support plate having the oxygen enriched membrane laminated on the surface thereof. Incinerator described. 20. The incinerator according to claim 19, wherein the porous support plate is made of at least one of polyether sulfone and polysulfone. 21. The incinerator according to claim 13, further comprising a fan that sends air to the oxygen-enriched membrane unit. 22. The oxygen-enriched membrane unit has a plurality of flat plate-shaped oxygen-enriched membrane modules arranged in parallel in a unit casing, and the oxygen-enriched membrane module maintains a predetermined distance. And at least two oxygen-enriched membranes spaced apart from each other, and a thin tube connected to the void, and an in-unit drain tube connected to each thin tube is provided in the unit casing. The air is sucked through the oxygen-enriched membrane module, the in-unit drain pipe, and the capillary by a pump.
The incinerator according to 3. 23. The incinerator according to claim 22, further comprising a fan that exhausts air in the oxygen-enriched membrane unit. 24. The incinerator according to claim 22, wherein a filter is provided on the front surface of the unit casing. 25. The flat plate oxygen-enriched membrane module comprises:
23. The incinerator according to claim 22, wherein a plurality of sheets are arranged so as to be parallel to the flow of the air in the unit casing.