JPH11325428A - Incinerator and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the title incinerator and a method of use thereof wherein articles with various physical properties to be incinerated are converted into combustible gas to facilitate incineration, and there are reduced amounts of dust containing dioxins involved in produced gas combustion waste gas and of other dusts, and further incombustible subjects such as metal and earth and sand in the articles to be incinerated are exhausted as a melt and then cooled for solidification. SOLUTION: There are provided in a gasification melting furnace section 10 a bottom lower section air supply nozzle 20, a bottom upper section air supply nozzle 26, a funnel-shaped section air supply nozzle 30, and a furnace loop section supply nozzle 34. There is further provided a molten article discharge port 14 in a furnace bottom section A. An article to be incinerated is inserted by a screw feeder 52 based upon an upper surface position of the article detected by an ultrasonic level sensor 42 to maintain the upper surface position within a predetermined region. There are further provided an article insertion section 44 and a produced gas exhaust section 46 on an upper portion of the gasifying/melting section 10. Produced gas in the gasifying/melting furnace section 10 is supplied to the produced gas combustion furnace section through a produced gas duct 100, and is completely combusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to gasify and burn a mixture of various incombustibles such as metals and earth and sand and various combustibles having different physical properties, and to solidify the incombustibles after melting them. Accordingly, the present invention relates to an incinerator that can be treated without causing environmental pollution and a method of using the same.

[0002]

2. Description of the Related Art (A)
Direct combustion type incinerator The direct combustion type incinerator here ignites the solid incinerator in the furnace and attempts to complete the combustion with a flame at a close distance of the solid in the furnace. It is a type of incinerator.

Conventionally, incinerators of this type discharge exhaust gas from a furnace (combustion chamber) into which incinerated materials are charged and incinerated, directly to the atmosphere through an exhaust port (chimney) communicating with the combustion chamber. There were many.

In recent years, as the incorporation rate of high-molecular petrochemical products such as synthetic resins and synthetic fibers into the incinerated material has increased, the primary combustion chamber in which the incinerated material is charged and burned as described above. In the subsequent process, another chamber (furnace) is provided as a secondary combustion chamber, and a direct combustion type incinerator of a type in which so-called smoke (carbon fine particles, soot, etc.) is reburned in the secondary combustion chamber is commercially available. . In some cases, another chamber (furnace) is provided as a tertiary combustion chamber after the secondary combustion chamber.

Some of the primary to tertiary combustion chambers are equipped with burners such as commercial fuel for the purpose of assisting combustion, and combustion gas is assisted in each of the combustion chambers. In some cases, the tertiary firing chamber is provided merely for the purpose of giving the residence time of the combustion gas.

However, these direct combustion type incinerators have the following problems. (1) The macroscopic view of solid matter combustion shows that the surface of the solid itself is burning directly, but microscopically, the decomposition gas (hydrocarbons and hydrogen) due to thermal decomposition of the solid matter
And the fine particles of carbon are generated, mixed (contacted) with air at a short distance from the surface of the solid, and burned. At the same time, the surface of the solid is carbonized and the surface combustion of the carbon is performed simultaneously. is there.

In this case, the flaming combustion of the pyrolysis product gas is performed at a close distance to the surface of the solid material during the pyrolysis. As a result, it becomes difficult to maintain complete combustion. In other words, when the pyrolysis gas is burned at a short distance from a solid that is undergoing pyrolysis (during combustion), the solid directly receives the heat of combustion of its own pyrolysis product gas. The amount of gas increases. Then, the amount of air required for complete combustion of the gradually or rapidly increased pyrolysis gas is also required to be gradually or rapidly increased, and the amount of combustion and heat of combustion further increase with the increase in the amount of air, and the amount of pyrolysis gas is increased. Since the amount of generation further increases, there is no limit. Eventually, the combustion heat capacity of the combustion chamber is exceeded, the amount of pyrolysis gas that can be completely burned is exceeded, and gaseous combustibles and carbon fine particles (soot) entrained in the gas do not complete combustion. It is sent to the next step (secondary combustion chamber) as it is, or it is discharged into the atmosphere often accompanied by a large amount of black smoke, odor, and further dioxins (DXNs).

[0008] Although the amount of incinerated substances is reduced by the progress of combustion in the furnace, it is practically necessary to supply an appropriate amount of air in accordance with the change with time of the combustion amount and maintain complete combustion, as a practical problem. And automatic control are extremely difficult. For this reason, incomplete combustion or excessively high temperature combustion due to air-fuel imbalance is caused, and there are many things that cause trouble.

[0009] In an incinerator, maintaining a constant amount and rate of combustion is one of the important conditions for maintaining complete combustion. For this reason, in many cases, control by regular and constant supply of incinerated materials has been attempted. However, in many cases, incinerated materials are generated (non-product) and waste,
Because it is a mixture with different physical properties, simply weight or volume (bulk)
It is very difficult to control the amount of combustion constant by quantifying the amount.

[0010] The internal volume of the incinerator, that is, the space for complete combustion is fixed. Therefore, with respect to the “increase in the amount of combustion” due to combustion fluctuation, the residence time of the combustion gas becomes relatively short, and the combustibles (gas, soot, etc.) are discharged to the atmosphere in a state where combustion is not completely completed. It will be. vice versa,
With respect to "decrease in combustion amount", the residence time of the combustion gas becomes relatively long, but the decrease in combustion amount lowers the temperature in the combustion chamber unless auxiliary combustion is involved, which may lead to incomplete combustion. (2) Even in the direct combustion type incinerator having the secondary combustion chamber and the tertiary combustion chamber, the exhaust gas often includes smoke.

The reason may be caused by inadequacy in the design of the combustion equipment, inadequate temperature in the combustion chamber, inadequate maintenance of combustion conditions such as combustion gas residence time in the combustion chamber, and oxygen supply. It is considered that one of the major reasons is that soot (carbon fine particles) generated by combustion with a flame in the primary combustion chamber, that is, at a short distance from the surface of the solid incinerated material, has poor flammability for some reason.

[0012] One of the reasons why the soot flammability deteriorates in this case is that soot produced by thermal decomposition of hydrocarbons becomes crystalline carbon close to graphite crystals. The inventor also assisted the combustion burner in the secondary combustion chamber with smoke (carbon fine particles) generated in the primary combustion chamber. For example, the residence time was 2 seconds, the gas temperature in the combustion chamber was 800 ° C., and the oxygen concentration of the gas in the combustion chamber. Even at 8%, it cannot be completely burned, and not only is it visible as smoke, but there are many findings exceeding 0.25 g / Nm ³ in the measurement of dust concentration in exhaust gas.

[0013] In the secondary combustion chamber and the tertiary combustion chamber, the so-called unburned residue of the primary combustion chamber is the object other than the reason why the carbon fine particles are not made flame-retardant by graphite crystallization. -The dispersion density of hydrocarbon gas and the like is extremely small, and it can be mentioned that combustibles in the gas are in a state in which fire is unlikely to occur.

[0014] In order to eliminate such flame retardancy, the furnace capacity for long-term stay at high temperature and supporting fuel by using a large amount of commercial fuel is expanded, and if a dust removing device having a high function is provided, it is simply incinerated. This not only increases the processing cost, but also increases the exhaust gas due to the auxiliary fuel, which is not preferable in terms of global environmental protection. (3) In a direct combustion type incinerator, solid incineration is incinerated by burning with flames at a short distance from the surface. Can easily cause soot (fine carbon particles) generated by incomplete combustion to accompany the combustion gas flow, and the dust in the exhaust gas often has a high concentration.

[0015] Further, in the direct combustion type incinerator, incinerators and bonfires are often moved in the furnace by stirring or moving the hearth to improve the contact between the incineration during combustion and air. The dust concentration in the exhaust gas is further increased. (4) In most direct combustion type incinerators, the cinders are discharged continuously or intermittently as they are from the incinerator, but their burning loss is not always small, and it is not unusual to exceed 10%. The presence of the unburned matter is due to DXNs in the cinders
In recent years, it has begun to be pointed out in Japan as one that affects the concentration. In addition, most of the harmful heavy metals mixed in the incineration remains in the cinders, and after final disposal (ground landfill / management type), are eluted into groundwater, etc., often causing problems.

Regarding such a problem, although treatment methods such as melting and solidification, chelation treatment and concrete solidification have been attempted for incinerators and the like of incinerated materials containing harmful heavy metals, in many cases, cinders are still used in many cases. (Main ash)
It cannot be said that detoxification of harmful substances such as DXNs and heavy metals therein has not been sufficiently achieved. (5) The above (1) to (4) are based on the incomplete combustion problem and unstable combustion problem caused by the combustion method of the direct combustion type incinerator, and the concentration of dust (carbon fine particles) in the exhaust gas and the cinder due to these problems. However, all of these problems are directly or indirectly related to DXNs, and matters related to residual ash (cinder ash) are as follows.
It is largely related to XNs and heavy metals. Neither of these can be overlooked as an important problem in environmental conservation.

[0017] These problems are difficult to improve by improving the combustion method (combustion technique) and the incinerator in the direct combustion type incinerator as described above. For this reason, an exhaust gas treatment facility having advanced functions must be attached and a large load must be imposed, which in turn increases the total cost of incineration treatment. (B) Batch type gasification combustion type incinerator (1) As for the gasification combustion type incinerator, a relatively small batch type is the mainstream. Most of them have a primary combustion chamber and a secondary combustion chamber (furnace), and the primary combustion chamber (furnace) is filled with incineration material, and usually fires from its bottom floor to continue flameless combustion. The incinerated material in contact with the combustion part is pyrolyzed and carbonized and gasified and carbonized by the flameless combustion heat.
The mixed gas of the flameless combustion gas and the pyrolysis product gas is caused to flow upward as a whole through the gap between the stacked incineration objects, and the mixed gas is converted into a secondary gas through a duct opened relatively to the upper part of the primary combustion chamber. It is led to the combustion chamber and burned in the secondary combustion chamber.

[0018] The primary combustion (flameless combustion) gas and the pyrolysis product gas reduce the flow velocity due to the resistance when passing through the gap between the stacked incineration objects in the furnace, and the cinders and incineration accompanying these gases are reduced. The fine particles accompanying the material, the fine particles of carbon (soot) generated by the thermal decomposition, and the like are filtered when passing through the gaps of the incinerated material. Therefore, the amount of the cinders, fine particles, soot and the like entrained in the secondary combustion chamber is significantly smaller than that of the direct combustion type incinerator. The dust concentration in the exhaust gas after burning the product gas in the secondary combustion chamber is usually 0.1.
01G / Nm ³ is around, sometimes reaching 0.003 g / Nm ^3.

However, in the case of a batch-type gasification combustion furnace, as the incineration progresses, the amount of the incineration material stacked decreases, so that the filtering effect is reduced. In particular, after the gasification of the incinerated material is completed, the surface of the fire layer is burned, and depending on the method of supplying air upward from the furnace bottom, fine particles (ash) of cinders are entrained in the exhaust gas for a short time. In some cases, the problem remains.

Further, when a low melting point metal or the like is mixed in the cinder, generation of fumes and melting may occur depending on the specifications of the air supply for burning fire. (2) In a batch type gasification combustion type incinerator, cinder (main ash) is temporarily stored in a room and then discharged. Since the cinders hardly move, the fire spreads throughout. As if burning a fire in a charcoal stove, the burning loss is usually 3% or less, and the residual DXNs is 0.003 ng-TEQ / g (ash) or less. In addition, since the air is usually supplied in a calm manner, the scattering of cinders (main ash) is smaller than that of a direct combustion type incinerator.

However, the heavy metals in the residual ash are the same as in the direct combustion type incinerator described above.
There remains a problem that it is necessary to perform a process such as melt solidification, chelate treatment, and concrete solidification.

The present invention has been made in view of the above-mentioned problems in the prior art, and has as its object to convert incinerated materials with various physical properties into combustible gas to facilitate incineration. The amount of dust and other dust containing DXNs that may be contained in the generated gas combustion exhaust gas is reduced by the generated gas filtration effect, and the incombustible materials such as metals and earth and sand in the incinerated material are melted. The incinerator that can effectively prevent environmental pollution by being cooled and solidified after being discharged as an incinerator and its usage method, sufficient for maintaining the flameless combustion state by maintaining the digestion distance of the incinerated material and filtering the generated gas An incinerator capable of maintaining the amount of incineration material stacked, and various hydrocarbon gases, shear gas, and DXNs that are likely to become DXNs, combustible dust, and DXNs precursors in the combustion exhaust gas while maintaining complete combustion of the generated gas. An object of the present invention is to provide an incinerator capable of effectively suppressing the emission of thermally decomposable harmful substances such as hydrogen hydride.

[0023]

Means for Solving the Problems (1) The incinerator of the present invention that achieves the above object has a melt discharge section and a bottom oxygen-containing gas supply section at the bottom of the furnace, and the lower portion is higher than the bottom of the furnace. Has a lower oxygen-containing gas supply section, has a product gas discharge section and an incineration substance charging section in the upper section, and has a vertical mold gasification and melting furnace section for gasifying and melting the incineration object. An incinerator comprising a product gas combustion unit that is generated in the gasification melting furnace unit and burns a product gas discharged from the gasification melting furnace unit through the generated gas discharge unit, wherein the bottom oxygen-containing gas supply unit is provided. And the lower oxygen-containing gas supply unit supplies an oxygen-containing gas at a flow rate at which the charge is flamelessly burned in a state where the charge in a predetermined range is charged. (Claim 1).

The gasification and melting furnace section may have a structure in which, for example, an outer shell is formed of a steel material and an inner surface is lined with a refractory. The vertical gasification and melting furnace section may be, for example, an upright, generally cylindrical shape.

The melt discharge section at the furnace bottom can be opened and closed by various opening and closing mechanisms. When the charging section is ignited at the furnace bottom, the ignition can be performed through the melt discharge section. For example, an ignition device (a gas burner, a plasma torch, or the like) may be provided at the furnace bottom to perform ignition.

It is preferable that a furnace bottom temperature detector (for example, a thermocouple) for detecting the temperature inside the furnace bottom is provided at the furnace bottom. With this furnace bottom temperature detector,
By detecting the temperature of the melt in the furnace bottom, it is possible to determine an appropriate time to discharge the melt from the melt discharge unit.

The bottom oxygen-containing gas supply section and the lower oxygen-containing gas supply section are supplied with an oxygen-containing gas from an oxygen-containing gas (typically, air) supply source such as a blower or a compressor provided outside the gasification melting furnace. The supply into the gasification melting furnace section can be performed, for example, from a nozzle provided on the inner wall of the gasification melting furnace section. The supply of the oxygen-containing gas by the bottom oxygen-containing gas supply unit and the lower oxygen-containing gas supply unit is desirably adjusted in pressure and flow rate so as to spread as much as possible in the horizontal direction of the charge.

The gasification melting furnace section may have a bosh section above the furnace bottom in a substantially lower half of the lower part thereof.

The lower oxygen-containing gas supply section supplies at least a portion of the oxygen-containing gas supplied into the gasification-melting furnace section (preferably, a large proportion of the oxygen-containing gas supplied into the gasification-melting furnace section, for example, about 60% To 90%) can be supplied above the furnace bottom (for example, the morning glory) in the lower half of the lower part of the gasification melting furnace.

A middle temperature detector (for example, a thermocouple) for detecting the temperature of the middle part in the vertical direction and the temperature of the upper part (mainly the temperature of the generated gas) in the gasification melting furnace part.
And an upper temperature detector (for example, a thermocouple) at the middle and upper portions, respectively. Based on these detected temperatures, etc., the state of combustion of the charge is grasped and controlled (mainly the supply of oxygen-containing gas into the gasification furnace from the bottom oxygen-containing gas supply unit and the lower oxygen-containing gas supply unit). Control of combustion by control).

An ignition device (gas burner, plasma torch, etc.) for igniting the charge is provided above the furnace bottom (for example, the upper half of the lower part) in the lower part of the gasification melting furnace part. Can be.

In addition, the inspection port which can be opened and closed may be provided, for example, in the middle part in the vertical direction of the gasification melting furnace.

Further, the upper part of the gasification melting furnace (furnace top, etc.)
Preferably has a relief valve.

In the generated gas combustion section, an ignition device or an auxiliary combustion device (for example, an ignition device) necessary for burning the generated gas generated in the gasification melting furnace section and discharged from the gasification melting furnace section through the generated gas discharge section. An oil-burning burner that uses oil such as heavy oil, gas such as LPG, and has good combustibility, low sulfur and halogen content, and an oxygen-containing gas supply unit. it can.

At the bottom or almost lower half of the lower part of the gasification melting furnace, a lump containing carbon as a main component, such as coal coke, graphite, charcoal, coal or wood chips, is charged. The incinerator is charged so that the bulk of the charge is within a predetermined range.

The main examples of the incinerated materials include various incombustible materials such as metals and earth and sand and mixtures of various combustible materials having different physical properties. Specific examples include crushed scrap cars, slingshot pachinko machines, waste home appliances, electronic components / go boards, waste carbon fibers, waste synthetic fibers (synthetic fibers with low melting points),
Crushed construction waste, animal and plant unnecessary materials, medical waste, animal dung, paper waste, wood waste, organic and inorganic sludge, contaminated materials such as PCB-contaminated paper called carbonless paper, primary treatment of PCB, former law Mixed with combustibles such as oils and fats, chemical substances, waste plastics, etc., disposed of on land based on environmental standards, improper land reclamation, and water / sediment-rich materials that need to be reprocessed. Examples include materials mixed with metals and the like in an inseparable state, and materials mixed with metals, glass, fibers, plastics, and the like, which are dangerous and difficult to separate, such as illegally dumped medical waste.

Next, if necessary, a preparation for burning the generated gas in the generated gas combustion section is performed, and a lump containing carbon as a main component and / or an incinerated substance (that is, both of them) at the bottom of the furnace in the gasification melting furnace section are prepared. Or one of them).

In a state where the charge in the above-mentioned predetermined range is charged, an oxygen-containing gas is supplied from the bottom oxygen-containing gas supply unit and the lower oxygen-containing gas supply unit at a flow rate at which the charge is flamelessly burned. If it continues, the incinerated material will continue flameless combustion mainly in the lower part.

Since the bottom oxygen-containing gas supply section and the lower oxygen-containing gas supply section are located at the lower portion in the gasification melting furnace section and have a product gas discharge section at the upper portion, the gas generated by the flameless combustion as a whole is It flows upward and the heat of its flameless combustion thermally decomposes its relatively close upper incineration material. The gas generated by the thermal decomposition also flows upward as a whole, and the incinerated material thereabove is preheated and dried, so that it becomes easier to thermally decompose. Since the concentration of combustible components in the gas generated by flameless combustion and pyrolysis is relatively high, and the amount of the generated gas is stable, the combustion of the product gas discharged from the product gas discharge unit in the product gas combustion unit Easy to control. With the progress of flameless combustion and thermal decomposition, the incinerated material at the lower part is sequentially reduced.

The gas generated by the flameless combustion and the thermal decomposition lowers the flow velocity due to the resistance when passing through the gap between the stacked incineration objects in the gasification melting furnace part, and causes the cinders and the entrainment accompanying the gases. The fine particles accompanying the incinerated material, the fine particles of carbon (soot) generated by the thermal decomposition, and the like are filtered when passing through the gap between the stacked incinerated materials. Therefore, D which may accompany the product gas discharged from the product gas discharge unit,
The amount of dust containing XNs and dust that can act as a catalyst for producing DXNs is reduced. Therefore, the amount of dust containing DXNs and other dust that can be contained in the exhaust gas generated when the generated gas accompanies the dust and burns in the generated gas combustion section is also effectively reduced.

The continuation and maintenance of the flameless combustion and the filtration effect can be achieved by adding the incinerated material in a timely manner to the quenching distanc.
It can be realized by maintaining e) and maintaining a sufficient amount of the incinerated material for filtering the generated gas, and controlling the flow rate, flow velocity, pressure, etc. of the oxygen-containing gas (for example, maintaining a predetermined range).

The incombustible substances such as metal and earth and sand in the incinerated material are supplied from a pre-charged coal coke or the like and the carbon of the incinerated material which is carbonized while receiving the supply of the oxygen-containing gas from the bottom oxygen-containing gas supply unit or the like. Most of the heat is melted by the combustion heat generated by combustion (surface combustion of a carbon mass having a significantly lower burning rate than the decomposition combustion) mainly in the furnace bottom or the lower part of the furnace including the furnace bottom, and most of the heat flows down the gaps of the massive carbon. The melt-down product, for example, is temporarily stored while being kept warm by the combustion heat of massive carbon or the like, and then discharged from the melt discharge portion at the bottom of the furnace, and is poured or poured into a water tank or a mold, whereby the cinder in the cinders is removed. It can be cooled and solidified including harmful substances such as heavy metals and DXNs. Therefore, it is possible to effectively prevent heavy metals and DXNs in the cinders from polluting the environment due to elution into groundwater. The possibility that a thermally decomposable substance is included in the solidified material is extremely low, and even if the solidified material is encapsulated, it hardly leaches or migrates to the surface of the solidified material. The detoxification of cinders can be performed mainly by the thermal energy of the waste itself.

The various controls described in the present specification for the incinerator of the present invention can be performed by appropriately using a control device using a microcomputer or other control devices.

The bottom oxygen-containing gas supply section and the lower oxygen-containing gas supply section are provided with a lump containing carbon as a main component in the furnace bottom or substantially lower half of the lower part in the gasification melting furnace. In a state in which a predetermined amount of incineration material is charged above the mass, an oxygen-containing gas is supplied at a flow rate at which the mass and the incineration material (preferably, the lower portion of the incineration material) burn without flame. (Claim 2). (1-1) In the incinerator of (1), the amount of incineration required to maintain the amount of charge in the gasification melting furnace within a predetermined range is gasified from the incineration charge. It is desirable to provide a device for charging the incineration material to be charged into the melting furnace part (claim 3).

By the incinerator charging apparatus, an amount of the incinerator required to maintain the amount of the in-gas in the gasification melting furnace within a predetermined range is supplied from the incinerator charging section to the gasification furnace. By being charged in the section, it is possible to maintain the inflammable combustion state by maintaining the digestion distance of the incinerated material and to maintain a sufficient amount of the incinerated material for filtering the generated gas.

In order to prevent the generated gas in the gasification melting furnace part from leaking out of the furnace and to prevent the flaming combustion of the generated gas by sucking outside air (usually, air) from outside the furnace into the gasification melting furnace part, the incineration material It is desirable that the charging device be capable of charging the incineration material into the gasification melting furnace while the outside air outside the furnace and the inside of the gasification melting furnace are shut off. Examples of such an incineration object charging apparatus include a screw feeder and a double-door plunger type feeder. (1-1-1) The incinerator according to (1-1) has a detection device for detecting the amount of charge in the gasification and melting furnace unit, and the incinerator charge device is detected by the detection device. The incinerated material can be charged into the gasification melting furnace from the incinerated material charging section in accordance with the amount of the charged material (claim 4).

Examples of the detecting device include a device for detecting the position of the upper surface of the charge in the gasification melting furnace portion by using an ultrasonic wave, a paddle sensor, and a temperature detector (for example, a middle portion in the vertical direction of the gasification melting furnace portion). It is located near or above it.
The temperature in the gasification and melting furnace increases when the incineration material decreases, and decreases when the incineration material increases due to thermal decomposition of the incineration material and vaporization of moisture and the like. ) And the like.

As an example of charging the incinerated material from the incinerated material charging section into the gasification smelting furnace section according to the detected amount of the charged material, the position of the upper surface of the incinerated material in the gasification smelting furnace section When the temperature of the incinerator drops below a predetermined position, a certain amount of the incineration material is charged from the incineration material charging section into the gasification melting furnace section each time.

Alternatively, the incinerator according to (1-1) is capable of continuously transferring a predetermined amount of the incinerator, particularly when the physical properties of the incinerator are relatively stable, such as shredder dust. It is also possible to charge the gas to be incinerated from the charging section of the incineration material either intermittently or intermittently. (1-2) In the incinerator according to (1), (1-1) or (1-1-1), the product gas combustion section transfers the product gas discharged from the gasification melting furnace section through the product gas discharge section. It can be a product gas combustion furnace section having a product gas introduction part to be introduced and an oxygen-containing gas supply part for product gas combustion (claim 5).

The product gas discharge part of the gasification melting furnace part and the product gas introduction part of the product gas combustion furnace part are made of, for example, a cylindrical heat-resistant and heat-insulating structure in which the outer shell is made of steel and the inner surface is lined with a refractory. Alternatively, they can be communicated by a rectangular tubular duct (communication passage).

The product gas combustion furnace section may have, for example, a structure in which an outer shell is formed of a steel material and an inner surface is lined with a refractory. The shape can be, for example, upright or sideways and generally cylindrical.

The product gas combustion furnace section can have, for example, a product gas introduction section at one end and an exhaust gas discharge section at the other end.

The product gas combustion furnace section is provided with an auxiliary burner (for example, oils such as heavy oil, LPG, etc.) at an appropriate position such as near the product gas introduction section or at an intermediate position between both ends of the product gas combustion furnace section.
Etc., which use a clean fuel having good combustibility and a low sulfur and halogen content). Before igniting the lower part of the carbon-based lump and / or incineration material in the furnace bottom in the gasification melting furnace and starting flameless combustion, before burning the product gas in the product gas combustion furnace, As preparation to perform, the generated gas combustion furnace part by the auxiliary combustion device,
(For example, preheating to a predetermined temperature [for example, 800 ° C.] at a temperature detected by a product gas combustion furnace temperature detector that detects the combustion temperature of the product gas or the temperature of the combustion exhaust gas in the product gas combustion furnace section as described below). No.

The oxygen-containing gas supply section for product gas combustion can be provided at an appropriate position in the product gas combustion furnace section.

The supply of the oxygen-containing gas to the product gas combustion oxygen-containing gas supply section is performed, for example, from an oxygen-containing gas (typically air) supply source such as a blower or a compressor provided outside the product gas combustion furnace section. The supply into the product gas combustion furnace unit can be performed, for example, from a nozzle provided on an inner wall portion of the product gas combustion furnace unit.

It is preferable that the product gas combustion furnace has an inspection port at an appropriate position such as an intermediate position between both ends thereof for inspecting the inside and discharging dust accumulated inside.

Since the amount of product gas generated by flameless combustion and thermal decomposition and introduced from the product gas introduction section is stable, gasification and melting from the bottom oxygen-containing gas supply section and the lower oxygen-containing gas supply section are performed. By controlling the supply of oxygen-containing gas into the furnace section, the amount of product gas generated by the flameless combustion and thermal decomposition of the incinerated material in the gasification and melting furnace section and introduced from the product gas introduction section is used as the content of the product gas combustion furnace. By appropriately controlling the supply of the oxygen-containing gas from the oxygen-containing gas supply unit for product gas combustion into the product gas combustion furnace unit, the residence time in the product gas combustion furnace unit (for example, 2 (Seconds or more), and complete combustion of the generated gas can be maintained. By maintaining the temperature inside the product gas combustion furnace section by the auxiliary combustion device as needed, it is possible to more reliably maintain complete combustion of the product gas. (1-2-1) The incinerator of (1-2) has a product gas combustion furnace temperature detector for detecting the combustion temperature of product gas or the temperature of flue gas in the product gas combustion furnace section, and Depending on the high or low temperature detected by the furnace temperature detector, the supply flow rate of the oxygen-containing gas into the gasification melting furnace section by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is decreased or increased, respectively. (Claim 6).

The supply flow rate of the oxygen-containing gas supplied from the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section into the gasification and melting furnace section may be increased or decreased, for example, by an oxygen-containing gas supply source and a lower oxygen-containing gas supply. This can be performed by providing a flow control valve between the section and / or the bottom oxygen-containing gas supply section, and controlling the opening of the flow control valve with a microcomputer or the like.

The supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section can be increased or decreased within a predetermined range. Further, when the supply of the oxygen-containing gas into the gasification and melting furnace section is performed at a plurality of locations, the range of increase or decrease can be determined for each.

The product gas combustion furnace temperature detector (for example, a thermocouple) can be provided at an appropriate place in the product gas combustion furnace section. Preferably, it is at or near the exhaust gas discharge section where the temperature of the combustion exhaust gas of the generated gas can be detected.

In this case, the decrease or increase in the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section is caused by the fact that the temperature detected by the product gas combustion furnace temperature detector is lower than a predetermined lower limit temperature. When the supply flow rate of the oxygen-containing gas into the gasification and melting furnace unit by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is increased, and the detected temperature is higher than a predetermined upper limit temperature, The supply flow rate of the oxygen-containing gas into the gasification melting furnace section by the oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section can be reduced. The supply flow rate of the oxygen-containing gas may be increased or decreased in a plurality of stages according to, for example, a change in temperature detected by a product gas combustion furnace temperature detector. The temperature change state may be such that a temperature change in a plurality of stages is detected in addition to the upper limit temperature and the lower limit temperature.

[0062] By reducing the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section, the rate of thermal decomposition of the incinerated material is reduced, and Generation of combustible gas due to decomposition can be suppressed, and the amount of product gas containing combustible gas introduced into the product gas combustion furnace can be reduced. Conversely, by increasing the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section, the rate of thermal decomposition of the incinerated material is increased, and the thermal decomposition is performed. And the amount of generated gas containing combustible gas introduced into the generated gas combustion furnace can be increased.

Therefore, when the temperature detected by the product gas combustion furnace temperature detector is high by a predetermined standard, the oxygen content in the gasification melting furnace section by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is determined. By reducing the gas supply flow rate, the combustion temperature of the product gas in the product gas combustion furnace can be reduced. When the temperature detected by the product gas combustion furnace temperature detector is low at a predetermined standard, the supply of the oxygen-containing gas into the gasification melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit. By increasing the flow rate, the combustion temperature of the product gas in the product gas combustion furnace can be increased. Therefore, by keeping the temperature of the generated gas within a required range in the generated gas incinerator and maintaining the complete combustion state of the generated gas, various carbonizations that are likely to be precursors of DXNs, combustible dust, and DXNs are made. It is possible to effectively suppress the emission of thermally decomposable harmful substances such as hydrogen gas and hydrogen cyanide. (1-2-1-1) In the incinerator of (1-2-1), the product gas combustion furnace is equipped with an auxiliary combustion device, and the temperature detected by the product gas combustion furnace temperature detector is If the supply flow rate of the oxygen-containing gas into the melting furnace does not increase sufficiently due to an increase in the supply flow rate, the combustion can be assisted by the combustion assist device (claim 7).

By increasing the supply flow rate of the oxygen-containing gas supplied from the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section into the gasification and melting furnace section, the combustion temperature of the produced gas or the temperature of the combustion exhaust gas is sufficiently increased. Even if it does not occur, by maintaining the temperature of the generated gas in a required range in the generated gas incinerator and maintaining the complete combustion state of the generated gas,
Efficient suppression of emission of XNs, combustible dust, various hydrocarbon gases which are likely to be precursors of DXNs, and pyrolytic harmful substances such as hydrogen cyanide can be achieved more effectively.

Auxiliary devices (for example, oils such as heavy oil, LPG
An auxiliary burner which uses a clean fuel having good combustibility and a low sulfur content and a low halogen content in gas such as, for example, in the vicinity of a product gas introduction portion or between both ends of a product gas combustion furnace portion. One or two or more can be provided at an appropriate position such as an arbitrary position.

In this case, the start and stop of the operation of the auxiliary combustion device can be performed, for example, as follows.

The supply flow rate of the oxygen-containing gas into the gasification melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section is to be increased or decreased within a predetermined range.

When the temperature detected by the product gas combustion furnace temperature detector is lower than a predetermined lower limit temperature, oxygen supplied to the gasification melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit. The supply flow rate of the contained gas is increased. When the temperature detected by the product gas combustion furnace temperature detector does not exceed a predetermined lower limit temperature even if the supply flow rate of the oxygen-containing gas is increased to the maximum (for example, after the oxygen-containing gas reaches the maximum supply flow rate, When the time measured by the timer reaches the predetermined time but does not exceed the predetermined lower limit temperature), the auxiliary combustion device is operated.

When the temperature detected by the product gas combustion furnace temperature detector exceeds a predetermined upper limit temperature, if the auxiliary combustion device is operating, the operation of the auxiliary combustion device is first stopped. When the temperature detected by the product gas combustion furnace temperature detector does not fall below a predetermined upper limit temperature (for example,
When the time measured by the timer reaches the predetermined time and does not fall below the predetermined upper limit temperature after the operation of the auxiliary combustion device is stopped), the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit The supply flow rate of the oxygen-containing gas into the gasification melting furnace is reduced.

The amount of heat generated by the auxiliary combustion device may be changed in a plurality of stages in accordance with, for example, a change in temperature detected by a product gas combustion furnace temperature detector. (1-2-2) For the incinerator of (1-2), (1-2-1) or (1-2-1-1), the oxygen concentration in the combustion exhaust gas of the product gas in the product gas combustion furnace section A lower oxygen-containing gas supply unit and / or a bottom oxygen-containing gas, respectively, depending on whether the oxygen concentration in the combustion exhaust gas of the product gas detected by the oxygen concentration detector is low or high. Reducing the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the supply section, and / or increasing the supply flow rate of the oxygen-containing gas into the product gas combustion furnace section by the product gas combustion oxygen-containing gas supply section;
Alternatively, the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section is increased by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section, and / or the product gas is supplied by the oxygen-containing gas supply section for producing gas combustion. The supply flow rate of the oxygen-containing gas into the combustion furnace can be reduced (claim 8).

In this incinerator, the mixing ratio between the amount of generated gas for maintaining complete combustion and the supply amount of oxygen-containing gas for combustion of generated gas in the generated gas combustion furnace is adjusted by adjusting the mixing ratio of the generated gas combustion furnace. This can be performed based on the concentration of residual oxygen in the combustion exhaust gas.

The oxygen concentration detector can be provided at an appropriate place where the oxygen concentration in the combustion exhaust gas of the produced gas can be detected. Preferably, it is an exhaust gas discharge part or its vicinity.

When the oxygen concentration in the combustion exhaust gas of the product gas detected by the oxygen concentration detector is low by a predetermined standard, the oxygen is supplied into the gasification and melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit. By reducing the supply flow rate of the oxygen-containing gas, the amount of product gas containing combustible gas introduced into the product gas combustion furnace section is reduced to reduce the amount of oxygen required for combustion, and complete combustion of the product gas Can be maintained. Further, the supply flow rate of the oxygen-containing gas into the product gas combustion furnace unit by the product gas combustion oxygen-containing gas supply unit can be increased to maintain complete combustion of the product gas. Complete combustion of the product gas is maintained by one or both of these, DXNs, combustible dust, DX
It is possible to effectively suppress the emission of various hydrocarbon gases, which are likely to be precursors of Ns, and thermally decomposable harmful substances such as hydrogen cyanide.

When the oxygen concentration in the combustion exhaust gas of the product gas detected by the oxygen concentration detector is high by a predetermined standard, the gasification melting furnace using the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is used. By increasing the supply flow rate of the oxygen-containing gas into the section, the rate of combustion and pyrolysis of the incinerated material is increased to increase the amount of product gas including combustible gas introduced into the product gas combustion furnace section while generating Complete combustion of the gas can be maintained. Complete combustion can be maintained even if the flow rate of the oxygen-containing gas supplied into the product gas combustion furnace by the product gas combustion oxygen-containing gas supply unit is reduced.

The supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section, and the inside of the product gas combustion furnace section by the product gas combustion oxygen-containing gas supply section. The supply flow rate of the oxygen-containing gas to each of them may be increased or decreased within a predetermined range. For example, the minimum value of the supply flow rate of the oxygen-containing gas into the gasification melting furnace can be set to zero. In addition, when the supply of the oxygen-containing gas into the gasification and melting furnace section is performed at a plurality of places, the increase / decrease range can be determined for each of them, and the supply of the oxygen-containing gas into the product gas combustion furnace section is performed at the plurality of places. In this case, the range of increase or decrease can be determined for each case.

In this case, the supply flow rate of the oxygen-containing gas into the gasification melting furnace section is reduced and / or the oxygen-containing gas supply flow rate into the product gas combustion furnace section is increased, or the supply flow rate of the oxygen-containing gas into the gasification melting furnace section is reduced. The increase in the supply flow rate of the oxygen-containing gas and / or the decrease in the supply flow rate of the oxygen-containing gas into the product gas combustion furnace can be performed, for example, as follows.

The oxygen concentration in the combustion exhaust gas of the product gas detected by the oxygen concentration detector is lower than the predetermined lower limit concentration (for example, 6%).
%), The supply flow rate of the oxygen-containing gas into the gasification melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is reduced, and / or the oxygen content for product gas combustion is reduced. The supply flow rate of the oxygen-containing gas into the product gas combustion furnace section by the gas supply section is increased,
When the oxygen concentration exceeds a predetermined upper limit concentration (for example, 8%), the supply flow rate of the oxygen-containing gas into the gasification melting furnace unit by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit And / or the supply flow rate of the oxygen-containing gas into the product gas combustion furnace unit by the product gas combustion oxygen-containing gas supply unit can be reduced.

Increase / decrease in the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section, and combustion of the generated gas by the oxygen-containing gas supply section for combustion of the generated gas The increase and decrease of the supply flow rate of the oxygen-containing gas into the furnace section may be performed in a plurality of stages according to, for example, a change state of the oxygen concentration detected by the oxygen concentration detector. The change state of the oxygen concentration may be such that not only the upper limit concentration and the lower limit concentration but also a concentration change in a plurality of stages is detected.

The control of the increase / decrease of the supply flow rate of the oxygen-containing gas into the gasification melting furnace section (and the operation of the auxiliary combustion apparatus) in accordance with the temperature detected by the generated gas combustion furnace temperature detector;
Increase / decrease of the supply flow rate of the oxygen-containing gas into the gasification / melting furnace according to the oxygen concentration in the combustion exhaust gas of the product gas detected by the oxygen concentration detector and / or change of the supply flow rate of the oxygen-containing gas into the product gas combustion furnace In the case of performing both control of increase and decrease, it is preferable to give priority to control in accordance with the temperature detected by the product gas combustion furnace temperature detector. (1-2-3) (1-2), (1-2-1), (1-2-1-1) or (1-2-2)
The incinerator has a carbon monoxide concentration detector that detects the concentration of carbon monoxide in the flue gas of the product gas in the product gas combustion furnace section, and the flue gas of the product gas detected by the carbon monoxide concentration detector When the concentration of carbon monoxide therein is high, the supply flow rate of the oxygen-containing gas into the gasification melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is reduced, and / or The supply flow rate of the oxygen-containing gas into the product gas combustion furnace section by the oxygen-containing gas supply section can be increased (claim 9).

In this incinerator, the mixing ratio between the amount of product gas for maintaining complete combustion and the supply amount of oxygen-containing gas for combustion of product gas in the product gas combustion furnace section is adjusted by adjusting the product gas combustion furnace section. This can be performed based on the concentration of carbon monoxide in the combustion exhaust gas.

The carbon monoxide concentration detector can be provided at an appropriate place where the concentration of carbon monoxide in the combustion exhaust gas of the produced gas can be detected. Preferably, it is an exhaust gas discharge part or its vicinity.

When the carbon monoxide concentration in the combustion exhaust gas of the product gas detected by the carbon monoxide concentration detector is high by a predetermined standard, gasification by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is performed. By reducing the supply flow rate of the oxygen-containing gas into the melting furnace section and reducing the amount of the generated gas containing combustible gas introduced into the generated gas combustion furnace section, the carbon monoxide in the combustion exhaust gas of the generated gas is reduced. The product gas can be completely burned by reducing the concentration. Further, by increasing the supply flow rate of the oxygen-containing gas into the product gas combustion furnace unit by the product gas combustion oxygen-containing gas supply unit, reducing the concentration of carbon monoxide in the combustion exhaust gas of the product gas, and completely burning the product gas. Can also. DXNs in combustible exhaust gas, combustible dust, various hydrocarbon gases that are likely to be DXNs precursors, pyrolytic harmful substances such as hydrogen cyanide, etc. It is possible to effectively control emissions.

In this case, the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section is reduced to a predetermined lower limit, so The flow rate of the oxygen-containing gas supplied by the oxygen-containing gas supply unit into the product gas combustion furnace unit may be increased in a range up to a predetermined upper limit.
Further, when the supply of the oxygen-containing gas into the gasification and melting furnace section is performed at a plurality of places, the reduction range can be determined for each of them, and the supply of the oxygen-containing gas into the product gas combustion furnace section is performed at the plurality of places. In each case, an increase range can be defined for each.

In this case, the supply flow rate of the oxygen-containing gas into the gasification melting furnace section and / or the supply flow rate of the oxygen-containing gas into the product gas combustion furnace section are increased, for example, as follows. can do.

When the carbon monoxide concentration in the combustion exhaust gas of the product gas detected by the carbon monoxide concentration detector exceeds a predetermined upper limit concentration (for example, 10 ppm), the lower oxygen-containing gas supply unit and / or The supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the bottom oxygen-containing gas supply section and / or the supply flow rate of the oxygen-containing gas into the product gas combustion furnace section by the product gas combustion oxygen-containing gas supply section An increase can be made.

The supply flow rate of the oxygen-containing gas into the gasification and melting furnace section is reduced by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section, and the product gas combustion furnace is provided by the oxygen-containing gas supply section for producing gas combustion. The supply flow rate of the oxygen-containing gas into the unit may be increased in a plurality of stages according to, for example, a change state of the carbon monoxide concentration detected by the carbon monoxide concentration detector. The change state of the carbon monoxide concentration may be such that a concentration change in a plurality of stages is detected in addition to the upper limit concentration.

The control of the increase and decrease of the supply flow rate of the oxygen-containing gas into the gasification melting furnace section (and the operation of the auxiliary combustion apparatus) according to the temperature detected by the generated gas combustion furnace temperature detector;
Reduction of the supply flow rate of the oxygen-containing gas into the gasification and melting furnace part and / or oxygen content in the generated gas combustion furnace part according to the carbon monoxide concentration in the combustion exhaust gas of the generated gas detected by the carbon monoxide concentration detector Both the control of increasing the gas supply flow rate, or the increase and decrease of the supply flow rate of the oxygen-containing gas into the gasification and melting furnace part in accordance with the oxygen concentration in the combustion exhaust gas of the product gas detected by these and the oxygen concentration detector and / or In the case of controlling the increase / decrease of the supply flow rate of the oxygen-containing gas into the product gas combustion furnace section, the control according to the temperature detected by the product gas combustion furnace temperature detector is given first priority, and the control is detected by the oxygen concentration detector. It is preferable that the control according to the oxygen concentration in the combustion exhaust gas of the produced gas be given second priority. (1-2-4) (1-2), (1-2-1), (1-2-1-1), (1-2-2) or (1-2-3) incinerators An ejector section at or near the product gas introduction section for supplying the product gas discharged from the gasification and melting furnace section through the product gas discharge section into the product gas combustion furnace section, and a driving fluid for the ejector section. It is preferable that the ejector unit is provided with an oxygen-containing gas ejection unit for ejecting an oxygen-containing gas into the product gas combustion furnace as part or all of the oxygen-containing gas supply unit for product gas combustion. For example, the direction of the generated gas flow and the end of the generated gas combustion furnace section side in a communication path such as a duct communicating the generated gas discharge section of the gasification melting furnace section and the generated gas introduction section of the generated gas combustion furnace section. By providing a nozzle that ejects the oxygen-containing gas in a direction substantially coincident with the above, such an ejector unit can be configured. (1-2-5) (1-2), (1-2-1), (1-2-1-1), (1-2-2),
In the incinerator of (1-2-3) or (1-2-4), the communication path connecting the generated gas discharge section of the gasification melting furnace section and the generated gas introduction section of the generated gas combustion furnace section is It is preferable that the inclination is downward or downward, or upward or upward, from the discharge section toward the product gas introduction section. That is, by eliminating any horizontal portion or U-shaped portion in the communication passage (for example, the duct as described above), for example, fumes and the like generated in the gasification melting furnace portion are accumulated and solidified, so that the communication passage is narrowed. This is to prevent the device from becoming in a closed state. More preferably, it is inclined downward or downward. (1-3) (1), (1-1), (1-1-1), (1-2), (1-2-1),
(1-2-1-1), (1-2-2), (1-2-3), (1-2-4) or (1-2-
In the incinerator of 5), the gasification and melting furnace section can be vertically separated at a lower portion (claim 11).

Normally, for example, in a state where the lower part of the gasification melting furnace is lifted by a support device having a jack mechanism,
The gasification smelting furnace section is used by connecting it up and down, and the molten material consisting of incombustibles such as metal and earth and sand in the incineration material is not well discharged from the melt discharge section, and solidifies in the lower part of the gasification smelting furnace section. In such a case, the incinerator is stopped and, for example, the support device is lowered, so that the inside of the gasification melting furnace can be easily maintained by being separated vertically. (2) The method of using the incinerator according to the present invention includes (1), (1-1), (1-1)
-1), (1-2), (1-2-1), (1-2-1-1), (1-2-2), (1-2
In the incinerator according to (-3), (1-2-4), (1-2-5) or (1-3), carbon is the main component in the bottom or almost lower half of the lower part of the gasification melting furnace. The mass and the incineration object (preferably, the lower part of the incineration object) are flamelessly burned while the mass to be incinerated is charged and a predetermined amount of the incineration object is charged above the mass. While supplying the oxygen-containing gas at a constant flow rate, the mass and the incinerated material are flamelessly burned to gasify and melt the incinerated material, and the gas generated in the gasification and melting furnace section is passed through the generated gas discharge section. The product gas discharged from the gasification melting furnace part is burned in the generated gas combustion part, and the incinerated material in the molten state in the gasification melting furnace part is melted,
It is discharged through a melt discharge part (claim 12). (2-1) The method of using the incinerator in (2) is that the specified amount of the material containing silicon dioxide as the main component is charged into the gasification melting furnace together with the incinerated material. (Claim 13).

When the incinerated material melted in the gasification melting furnace section has a problem in the physical and chemical properties of the solidified solidified product, for example, when the crushing strength of the solidified product is insufficient, or When the basicity is high and there is a possibility of a chemical reaction such as a hydration reaction thereafter, for example, a material mainly composed of silicon dioxide such as glass dust (main component: SiO ₂ ) and river sand (main component: SiO ₂ ) Together with the incineration material (which may be added and blended in advance) is preferably charged into the gasification melting furnace to vitrify the solidified material.

[0090]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view of an incinerator as an example of an embodiment of the present invention, and FIG. 2 is an enlarged view of a gasification melting furnace section in FIG.

This incinerator mainly comprises a gasification melting furnace section 10
And the generated gas combustion furnace section 60 and its gasification and melting furnace section 10
Gas duct 10 which communicates with the product gas combustion furnace section 60
Consists of zero.

The gasification and melting furnace section 10 has a structure in which an outer shell is formed of a steel material, and the entire inner surface is lined with a refractory material, and has an upright and substantially cylindrical shape.

The gasification and melting furnace unit 10 has a lower half in the lower part.
Furnace having a smallest diameter furnace bottom A and a bosh section B on the upper side that gradually expands upward in the shape of a truncated cone on the upper side, and a furnace that gradually expands upward in the upper half of the lower part It has an abdomen C. Further, the upper part of the gasification and melting furnace part 10 has a furnace chest D whose diameter gradually decreases upward. Gasification melting furnace part 1
The upper end of 0 is a furnace top E for convenience.

The furnace bottom A is configured to be vertically separable and connectable to a furnace bottom upper part A1 and a furnace bottom lower part A2 at an intermediate position in the vertical direction. The inner peripheral side of the lower end of the outer peripheral wall of the upper furnace bottom A1 is formed in an annular convex portion, and the inner peripheral side of the upper end of the outer peripheral wall of the lower furnace bottom A2 is formed in a concave portion. Done. The lower furnace bottom A2 is supported upward by a support device 12 having a jack mechanism and is connected to the upper furnace bottom A1. Except for the furnace bottom lower part A2 in the gasification melting furnace part 10, it is supported by a support (not shown).

The lower furnace bottom A2 has a melt discharge port 1 at the lower end.
4 (melt discharge part), and the bottom surface of the furnace bottom lower part A2 is formed so as to be inclined downward toward the melt discharge port 14. The external opening of the melt discharge port 14 is closed by an opening / closing device 16 using a hydraulic cylinder or the like.

Further, a furnace bottom temperature sensor 18 is provided at the bottom of the furnace bottom lower part A2 on the side opposite to the melt discharge port 14.

[0098] On the outer peripheral wall at an intermediate position in the vertical direction of the lower furnace bottom A2, the air supplied from the air supply device H (blower) is blown out slightly downward into the lower furnace bottom A2 via the metering valve 22. The air supply nozzle 20 (bottom oxygen-containing gas supply unit) is provided. On the outer peripheral wall at the upper end of the upper furnace bottom A1, a bottom upper air supply nozzle 26 (bottom oxygen-containing gas) that horizontally blows air supplied from the air supply device H into the upper furnace bottom A1 via the metering valve 24 is provided. Supply unit).

On the outer peripheral wall of the bosh section B, a bosh section air supply nozzle 30 (lower oxygen-containing gas supply section) for jetting air supplied from the air supply apparatus H in a horizontal direction through a metering valve 28 is provided.
It has all over the up-down direction.

Above the furnace abdomen C, there is provided a furnace abdominal air supply nozzle 34 (lower oxygen-containing gas supply unit) for jetting air supplied from the air supply device H slightly downward through the metering valve 32. Further, an ignition device 36 using LPG supplied from an LPG tank I (fuel source) as fuel is provided below the furnace abdomen C.
(LPG torch) is provided.

A lower middle temperature sensor 38 at the lower end of the outer peripheral wall of the furnace chest D, an inspection port 40 closed at the lower part by an openable lid, and an ultrasonic level sensor 42 at the upper part.

At the furnace top E, the lower end of the incineration object charging section 44 having a downwardly inclined cylindrical shape and the lower end of the product gas discharging section 46 having a vertical cylindrical shape open downward.

The product gas discharge section 46 has a relief valve 48 at the upper end and an upper temperature sensor 50 at the lower part of the outer peripheral wall.

At the upper end of the incineration material charging section 44, there is provided a screw feeder 52 (incineration material charging device) having a hopper at the top.

An elevating bucket 54 is provided on the side of the gasification and melting furnace section 10 for charging the incineration material into the hopper 52a of the screw feeder 52.

Below the external opening of the melt outlet 14,
A water tank 56 is provided.

The product gas combustion furnace section 60 has a substantially cylindrical shape in the horizontal direction in which the outer shell is formed of a steel material and the entire inner surface is lined with a refractory.

The right end of the product gas combustion furnace section 60 is a small diameter product gas ignition zone F, and the left side thereof is slightly enlarged. On its left side is a combustion zone G further expanded through a grid-like structure 62, on the left side of the combustion zone G there is a grid-like structure 64, and on its left side, a vertical cylindrical exhaust gas discharge part 66 Is open at the lower end. An inspection and dust discharge port 67 closed by a lid that can be opened and closed is provided at a lower portion on the base end side of the lattice structure 62 in the generated gas combustion furnace section 60.

[0109] Above the base end (right end) of the product gas ignition zone F, there is a product gas introduction part 68, which is above the product gas discharge part 46 of the gasification melting furnace part 10 and the product gas combustion furnace part 60. The gas introduction section 68 is communicated by a cylindrical product gas duct 100 having a heat-resistant and heat-insulating structure in which the outer shell is formed of a steel material and the inner surface is entirely lined with a refractory.

At the lower end of the product gas duct 100, there is provided an ejector 70 for feeding the product gas discharged from the gasification melting furnace 10 through the product gas discharge part 46 into the product gas combustion furnace 60. . At the center of the ejector 70, air supplied from the air supply device J (blower) is fed through a metering valve 72 in the direction of the generated gas flow (the generated gas duct 10).
The ejector nozzle 74 (oxygen-containing gas supply unit for producing gas combustion) ejects air in a direction substantially coinciding with the direction of the lower end of the zero (0).

At the center of the base end (right end) of the generated gas ignition zone F and at the front end side (left side) of the generated gas ignition zone F, L
The auxiliary burners 76 and 78 using LPG supplied from the PG tank K (fuel source) as fuel are provided.

The air supplied from the air supply device J is supplied to the base end and the front end of the outer peripheral wall of the combustion zone G, respectively, by the metering valve 8.
The combustion zone base end nozzle 82 (oxygen-containing gas supply unit for product gas combustion) that jets slightly toward the front through the nozzle 0 and the combustion zone tip nozzle 86 that jets slightly toward the front via the metering valve 84 ( (Oxygen-containing gas supply unit for product gas combustion).

An exhaust gas temperature sensor 88 (product gas combustion furnace temperature detector), an oxygen concentration sensor 90 (oxygen concentration detector), and a carbon monoxide concentration sensor 92 (one) Carbon oxide concentration detector).

The incinerator can be used as follows.

After charging the coal coke into the furnace bottom A, the incinerated materials (mixtures having various physical properties including various incombustible materials such as metals and earth and sand and various combustible materials) introduced into the hopper 52a by the lifting bucket 54. Is charged to a predetermined position of the furnace chest D via the incineration material charging section 44 by the screw feeder 52.

The auxiliary burner 76 of the product gas combustion furnace section 60
After confirming that the temperature inside the product gas combustion furnace section 60 has become equal to or higher than a predetermined temperature (for example, 800 ° C.) based on the temperature detected by the exhaust gas temperature sensor 88, the ignition device 36 is operated.
Or by using an LGP torch or a plasma torch by opening the external opening of the melt discharge port 14 by the opening / closing device 16,
The lower part of the incineration and / or the lower part of the coal coke is ignited.

After the ignition, the air whose supply flow rate, pressure and flow rate are controlled by the metering valve 22, the metering valve 24, the metering valve 28 and the metering valve 32 are supplied to the lower lower air supply nozzle 20, the lower upper air supply nozzle. 26, the flameless combustion of the material to be incinerated or the material to be incinerated and coal coke is continued by supplying into the gasification and melting furnace unit 10 by the bosh section air supply nozzle 30 and the furnace abdomen air supply nozzle 34. The incinerated material at a relatively close position is thermally decomposed by the heat generated by the flameless combustion to generate a combustible gas.

At the same time, air whose supply flow rate, pressure and flow rate are controlled by the metering valve 72, the metering valve 80 and the metering valve 84 are supplied to the ejector nozzle 74 and the combustion zone base end nozzle 82.
And the generated gas combustion furnace section 6 by the combustion zone tip nozzle 86
Supply within 0.

By ejecting air from the ejector nozzle 74, the ejector section 70 is operated, and the gasification and melting furnace section 10 is operated.
The gas generated in the chamber is generated gas discharge part 4
6 through the generated gas duct 100 to be supplied into the generated gas combustion furnace section 60.

The product gas duct 100 is formed so as to be inclined downward or downward from the product gas discharge part 46 to the product gas introduction part 68, and the fumes and the like generated in the gasification melting furnace part 10 are retained and solidified, so that the product gas duct 1 is formed.
00 is prevented from becoming stenotic or closed.

Since the gasification melting furnace section 10 has the generated gas discharge section 46 at the upper portion, the gas generated by the flameless combustion flows upward as a whole, and the heat generated by the flameless combustion causes the gas generated by the flameless combustion to move relatively upward. Of the incinerated material is thermally decomposed. The gas generated by the pyrolysis also flows upward as a whole,
Further, the incinerated material thereabove is preheated and dried to be easily decomposed. That is, the incinerated material goes from the lower part to the upper part, and is continuously formed with the flameless combustion layer, the thermal decomposition layer, the preheating / drying layer, and the base layer, and the flameless combustion and the thermal decomposition proceed efficiently.

Since the concentration of combustible components in the gas generated by flameless combustion and pyrolysis is relatively high and the amount of the generated gas is stable, the generated gas Control of combustion in the furnace section 60 is easy. With the progress of flameless combustion and thermal decomposition, the incinerated material at the lower part is sequentially reduced.

The gas generated by the flameless combustion and the thermal decomposition lowers the flow velocity due to the resistance when passing through the gaps of the incineration materials stacked in the gasification melting furnace section 10, and the cinder accompanying the gases decreases. Fine particles accompanying the incineration material, carbon fine particles (soot) generated by the thermal decomposition, and the like are filtered when passing through the gaps of the stacked incineration materials. Therefore,
The amount of dust containing DXNs and dust that can act as a catalyst for generating DXNs, which can accompany the generated gas discharged from the generated gas discharge unit 46, is reduced. Therefore, DX which can be contained in the exhaust gas generated by burning the generated gas with the dust in the generated gas combustion furnace section 60 is included.
The amount of dust containing Ns and other dust is also effectively reduced.

Based on the upper surface position of the object to be incinerated detected by the ultrasonic level sensor 42, the object to be incinerated is screwed by the screw feeder 52 in order to maintain the upper surface position of the object to be incinerated in the gasification melting furnace section 10 within a predetermined range. To charge. This allows
Since the incineration material stacking amount sufficient for the digestion distance and the filtration of the produced gas is maintained, it is effective for the flameless combustion and the continuation and maintenance of the filtration effect. Since the screw feeder 52 can charge the incineration material into the gasification and melting furnace unit 10 in a state where the outside air and the inside of the gasification and melting furnace unit 10 are shut off, the screw feeder 52 can prevent the generated gas from leaking out of the furnace and from outside the furnace. The flaming combustion of the generated gas due to the suction of outside air into the gasification melting furnace unit 10 is prevented.

The incombustible substances such as metal and earth and sand in the incinerated material are formed by the lump carbon such as coal coke and the carbonized incinerated material which have been charged beforehand.
Most of the melting is caused by the combustion heat generated by burning at the furnace bottom A or the furnace bottom A and the bosh section B (surface combustion of the carbon mass having a remarkably slower burning rate than the decomposition combustion) while receiving the supply of air from the like. And flows down the gaps of the massive carbon. The melt-down product is temporarily stored while being kept warm by the heat of combustion of the massive carbon, and after the furnace bottom temperature sensor 18 detects that the temperature is equal to or higher than a predetermined temperature, the switch 16 opens and closes the melt discharge port 14. Is opened and discharged, and is poured into the water tank 56. As a result, heavy metals and DX in the cinders
It can be cooled and solidified including harmful substances such as Ns. Therefore, it is possible to effectively prevent heavy metals and DXNs in the cinders from polluting the environment due to elution into groundwater.

It is to be noted that, in the case where the molten material composed of incombustible substances such as metal and earth and sand in the incinerated material is not successfully discharged from the molten material discharge port 14 and solidified in the lower part of the gasification melting furnace part 10, etc. By suspending the incinerator and lowering the support device 12, the lower part A2 of the furnace bottom can be separated downward from the upper part A1 of the furnace to maintain the inside.

As described above, the product gas supplied into the product gas combustion furnace section 60 is supplied to the auxiliary burner 76.7 which is operating in advance.
8 and is ignited in the generated gas ignition zone F. The ignited gas passes through the grid-like structure 62 while burning, and further burns in the combustion zone G, and the grid-like structure 64
And is discharged from the exhaust gas discharge unit 66.

In the combustion in the product gas combustion furnace section 60, air adjusted and controlled to an appropriate flow rate, pressure and flow rate by the metering valve 72, the metering valve 80, and the metering valve 84 is used. It is done by feeding inside. Maintaining the complete combustion state of the product gas in the product gas combustion furnace section 60 is as follows:
Based on the detection information of the exhaust gas temperature sensor 88, the oxygen concentration sensor 90, and the carbon monoxide concentration sensor 92, the metering valve 22, the metering valve 24, the metering valve 28, and the metering valve 32 of the gasification melting furnace unit 10, And a metering valve 72 of the product gas combustion furnace section 60,
This is performed by controlling the amount of air supplied by each nozzle by increasing or decreasing the opening of the metering valve 80 and the metering valve 84. For maintaining the temperature in the product gas combustion furnace section 60 necessary for complete combustion, an appropriate temperature range is set in advance in a temperature control system such as a microcomputer, and the temperature detected by the exhaust gas temperature sensor 88 is lower than a predetermined lower limit temperature. , The degree of opening of the metering valves 22, 24, 28, 32 is increased to increase the air supply flow rate into the gasification and melting furnace unit 10 to increase the rate of thermal decomposition of the incinerated material, The generation of flammable gas by decomposition is promoted, the amount of generated gas including flammable gas introduced into the generated gas combustion furnace section 60 is increased, and the opening of the metering valves 72, 80, 84 is also increased. Thus, the amount of air supplied to the product gas combustion furnace unit 60 used for combustion of the product gas is increased. However, each of the metering valves of the gasification melting furnace section 10 and the product gas combustion furnace section 60 is provided with the maximum degree of opening, and does not increase the air supply amount indefinitely.
After opening each metering valve to increase the air supply amount in this way, the temperature detected by the exhaust gas temperature sensor 88 does not recover to an appropriate range even after a predetermined time has elapsed by a timer built in the temperature control system. In case, burner burner 76
78 is operated, and the inside of the product gas combustion furnace section 60 is maintained at an appropriate temperature.

When the temperature detected by the exhaust gas temperature sensor 88 exceeds a predetermined upper limit temperature, if the auxiliary burners 76 and 78 are operating, the operation of the auxiliary burners 76 and 78 is first stopped. After the operation is stopped, if the temperature detected by the exhaust gas temperature sensor 88 does not recover to an appropriate range even after a predetermined time has elapsed by a timer built in the temperature control system, the opening of the metering valve 22, 24, 28, 32 is adjusted. The amount of the generated gas including the combustible gas introduced into the generated gas combustion furnace section 60 is reduced to reduce the amount of the generated gas, and the opening of the metering valves 72, 80, and 84 is also reduced to be used for the combustion of the generated gas. The amount of air supplied to the product gas combustion furnace section 60 is reduced. The minimum opening of the metering valve of the gasification melting furnace unit 10 can be set. In order to maintain the oxygen concentration in the product gas combustion furnace section 60 necessary for complete combustion, an appropriate oxygen concentration range is set in advance in a residual oxygen concentration control system such as a microcomputer,
When the oxygen concentration detected by the oxygen concentration sensor 90 is lower than the predetermined lower limit concentration, the metering valves 22, 24, 28,.
32 to reduce the amount of product gas containing combustible gas introduced into the product gas combustion furnace section 60 by reducing the opening of
The degree of opening of the metering valves 72, 80, and 84 is increased to increase the amount of air supplied to the product gas combustion furnace section 60, thereby recovering the appropriate oxygen concentration. However, the minimum opening of the metering valve of the gasification melting furnace section 10 is 0, and the maximum opening of the metering valve of the product gas combustion furnace section 60 is set.

When the oxygen concentration detected by the oxygen concentration sensor 90 exceeds a predetermined upper limit concentration, the opening degree of the metering valves 22, 24, 28, 32 is increased and the inside of the product gas combustion furnace section 60 is increased. The amount of product gas containing combustible gas introduced into the furnace is increased, or the amount of air supply to the product gas combustion furnace unit 60 is reduced by decreasing the opening of the metering valves 72, 80, and 84, and the appropriate oxygen concentration To recover. The evaluation of the maintenance of the complete combustion state in the product gas combustion furnace unit 60 is performed based on the concentration of carbon monoxide to contribute to the maintenance of the complete combustion state. When an upper limit is set and the carbon monoxide concentration detected by the carbon monoxide concentration sensor 92 is a concentration exceeding a predetermined upper limit concentration,
The amount of product gas containing combustible gas introduced into the product gas combustion furnace unit 60 may be reduced by reducing the opening of the metering valve 22, 24, 28, 32, or the metering valve 72, 80, 84. Is increased to increase the amount of air supplied to the product gas combustion furnace section 60, thereby recovering an appropriate carbon monoxide concentration. However, the minimum opening of the metering valve of the gasification melting furnace unit 10 and the maximum opening of the metering valve of the product gas combustion furnace unit 60 are set to the maximum.

The above control and the control are performed in the priority order of. Maintaining the complete combustion state of the generated gas effectively suppresses the emission of DXNs, combustible dust, various hydrocarbon gases likely to become DXNs precursors, and thermally decomposable harmful substances such as hydrogen cyanide. It is possible.

[0132] The generated gas combustion furnace section 60 has a volume in which the combustion gas stays for 2 seconds or more, and has a diameter such that the combustion flame of the generated gas does not touch the inner wall.

The lattice-like construct 62 and the lattice-like construct 64
Is for promoting flame holding and turbulent mixing, and the grid spacing needs to be large enough for the flame to pass through. The rectification or laminar flow of the flame or exhaust gas is turned into turbulent or eddy by this obstacle, promoting turbulent mixing. The lattice-like structure 62 and the lattice-like structure 64 are interposed in the flame flow in the product gas combustion furnace part 60 and disperse the flame.
Due to the dispersion of the flame, these lattice-like structures 62 and lattice-like structures 64 are uniformly red-heated (heat diffusion), and all the exhaust gas passes somewhere in the lattice, and the combustion of unburned matter accompanying the exhaust gas is promoted. You. Further, the unstable flame is held by the grid-like structure 62 and the grid-like structure 64 that are glowed red.

If necessary, the product gas combustion furnace section 60
An exhaust gas treatment device for treating combustion exhaust gas discharged from the exhaust gas through an exhaust gas discharge unit 66 is provided to perform rapid cooling of exhaust gas (for example, 200 ° C. or lower), neutralization, decomposition or adsorption removal of harmful substances by a catalyst, dust removal, and the like.

The ignition device 36, the metering valve 22, the metering valve 24, the metering valve 28, the metering valve 32, and the screw feeder 5
2. The lifting bucket 54, the metering valve 72, the metering valve 80, the metering valve 84, the auxiliary burners 76 and 78, the opening / closing device 16, etc. are provided with the furnace bottom temperature sensor 18, the middle temperature sensor 38, and the ultrasonic level. Based on detection signals from the sensor 42, the upper temperature sensor 50, the exhaust gas temperature sensor 88, the oxygen concentration sensor 90, and the carbon monoxide concentration sensor 92, it is controlled by a control device (not shown) using a microcomputer. be able to.

The scope of the present invention is limited to only the number, material, shape, relative arrangement, and the like of the components in the above description of the embodiments, unless otherwise specified. It is not intended to be a mere explanation, but merely an explanation example.

[0137]

According to the incinerator and the method of use of the present invention,
The incinerated materials having various physical properties can be burned into a combustible gas which can be burned more homogeneously and more stably by pyrolysis in the gasification melting furnace to facilitate incineration.

The gas generated by the flameless combustion at the lower part of the incineration material and the thermal decomposition due to the heat is filtered through the gaps between the stacked incineration materials, and then filtered in the generated gas combustion section. Therefore, the amount of dust containing DXNs and other dust that may be contained in the combustion exhaust gas of the generated gas is effectively reduced.

Further, incombustibles such as metals and earth and sand in the incinerated materials are discharged as a molten state, and heavy metals and DXNs in the cinders are removed.
Since it can be cooled and solidified including harmful substances such as harmful substances, environmental pollution due to elution into groundwater and the like can be effectively prevented.

In the incinerator according to the third aspect, it is possible to maintain the inflammable combustion state by maintaining the digestion distance of the incinerated material and to maintain a sufficient amount of the incinerated material for filtering the generated gas.

In the incinerator according to the sixth aspect, the combustion temperature of the product gas in the product gas combustion furnace section is adjusted by increasing or decreasing the supply flow rate of the oxygen-containing gas supplied into the gasification melting furnace section. Maintain full combustion of
It is possible to effectively suppress the emission of DXNs, combustible dust, various hydrocarbon gases that are likely to be precursors of DXNs, and pyrolytic harmful substances such as hydrogen cyanide in the combustion exhaust gas.

In the incinerator according to the eighth aspect, the adjustment of the mixing ratio between the generated gas amount and the supply amount of the oxygen-containing gas for combustion of the generated gas is adjusted based on the residual oxygen concentration in the combustion exhaust gas of the generated gas combustion furnace section. Complete combustion of the generated gas is maintained, and DXNs, combustible dust,
Various hydrocarbon gases that are likely to be precursors of XNs,
It is possible to effectively suppress emission of thermally decomposable harmful substances such as hydrogen cyanide.

In the incinerator according to the ninth aspect, the adjustment of the mixing ratio between the amount of the produced gas and the supply amount of the oxygen-containing gas for combustion of the produced gas is adjusted to the concentration of carbon monoxide in the combustion exhaust gas of the produced gas combustion furnace section. Based on this, complete combustion of the generated gas is maintained, and DXNs, combustible dust,
It is possible to effectively suppress the emission of various hydrocarbon gases, which are likely to be DXNs precursors, and thermally decomposable harmful substances such as hydrogen cyanide.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an incinerator.

FIG. 2 is an enlarged view of a gasification melting furnace section in FIG.

[Explanation of symbols]

 A Furnace Bottom 10 Gasification Melting Furnace 14 Melt Outlet 20 Bottom Lower Air Supply Nozzle 26 Bottom Upper Air Supply Nozzle 30 Morning Glory Air Supply Nozzle 34 Furnace Abdominal Air Supply Nozzle 42 Ultrasonic Level Sensor 44 Incineration Material Loading Section 46 Product gas discharge unit 52 Screw feeder 60 Product gas combustion furnace unit 100 Product gas duct

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F23G 5/50 ZAB F23G 5/50 ZABF ZABG ZABH ZABJ ZABM ZABN

Claims (13)

[Claims] 1. A furnace having a melt discharge section and a bottom oxygen-containing gas supply section at the bottom of the furnace, a lower oxygen-containing gas supply section above the bottom of the furnace at a lower portion, and a product gas discharge section and a cover at the upper section. It has an incineration material charging section, and a vertical mold gasification and melting furnace section for gasifying and melting the incineration material, and is generated in the gasification and melting furnace section, and gasified through the generated gas discharge section. An incinerator provided with a product gas combustion unit for burning a product gas discharged from a melting furnace unit, wherein the bottom oxygen-containing gas supply unit and the lower oxygen-containing gas supply unit are charged with a charge in a predetermined range. An incinerator characterized by supplying an oxygen-containing gas at a flow rate at which the charge is flamelessly burned in the charged state. 2. A bottom oxygen-containing gas supply section and a lower oxygen-containing gas supply section, wherein a lump containing carbon as a main component is charged into a furnace bottom or a substantially lower half of a lower part in a gasification melting furnace. 2. The method according to claim 1, wherein an oxygen-containing gas is supplied at a flow rate at which the mass and the incineration material are burned in a flameless manner in a state in which the mass of the mass and the incineration material are charged above the mass. Incinerator. 3. An object to be charged into the gasification and melting furnace section from the incineration material charging section with an amount to be incinerated required to maintain the amount of the charge in the gasification and melting furnace section within a predetermined range. The incinerator according to claim 1 or 2, further comprising an incinerator charging device. 4. A device for detecting the amount of charge in a gasification melting furnace section, wherein the device for charging incineration material includes an object for incineration in accordance with the amount of charge detected by the detection device. 4. The incinerator according to claim 3, wherein the incinerator is charged from the charging section of the incinerated material into the gasification melting furnace section. 5. A product gas combustion unit having a product gas introduction unit for introducing product gas discharged from a gasification melting furnace unit through a product gas discharge unit, and a product gas combustion oxygen-containing gas supply unit. 5. The incinerator according to claim 1, wherein the incinerator is a product gas combustion furnace section. 6. A product gas combustion furnace temperature detector for detecting a combustion temperature of a product gas or a temperature of a combustion exhaust gas in a product gas combustion furnace section, wherein the temperature of the temperature detected by the product gas combustion furnace temperature detector is high or low. The incinerator according to claim 5, wherein the supply flow rate of the oxygen-containing gas into the gasification melting furnace section by the lower oxygen-containing gas supply section and / or the bottom oxygen-containing gas supply section is decreased or increased, respectively, depending on the low. 7. The product gas combustion furnace section is provided with an auxiliary combustion device, and the temperature detected by the product gas combustion furnace temperature detector can be sufficiently increased by increasing the supply flow rate of the oxygen-containing gas into the gasification melting furnace section. 7. The incinerator according to claim 6, wherein the fuel is burned by a burner when the ascent does not rise. 8. An oxygen concentration detector for detecting an oxygen concentration in a combustion exhaust gas of a product gas in a product gas combustion furnace section,
Depending on whether the oxygen concentration in the combustion exhaust gas of the product gas detected by the oxygen concentration detector is low or high, oxygen in the gasification and melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit, respectively. The supply flow rate of the containing gas is reduced, and / or the supply flow rate of the oxygen-containing gas into the product gas combustion furnace by the product gas combustion oxygen-containing gas supply unit is increased, or the lower oxygen-containing gas supply unit and / or the bottom oxygen is supplied. Increasing the supply flow rate of the oxygen-containing gas into the gasification and melting furnace section by the containing gas supply section and / or decreasing the supply flow rate of the oxygen-containing gas into the product gas combustion furnace section by the product gas combustion oxygen-containing gas supply section. The incinerator according to claim 6 or 7, wherein the incinerator is operated. 9. A flue gas of a product gas which has a carbon monoxide concentration detector for detecting a concentration of carbon monoxide in a flue gas of a produced gas in a produced gas combustion furnace part, and which is detected by the carbon monoxide concentration detector. When the concentration of carbon monoxide therein is high, the supply flow rate of the oxygen-containing gas into the gasification melting furnace by the lower oxygen-containing gas supply unit and / or the bottom oxygen-containing gas supply unit is reduced, and / or 9. The incinerator according to claim 6, wherein the oxygen-containing gas supply unit increases the flow rate of the oxygen-containing gas supplied into the product gas combustion furnace unit. 10. A communication path for communicating a product gas discharge part of the gasification melting furnace part and a product gas introduction part of the product gas combustion furnace part is inclined downward or downward from the product gas discharge part toward the product gas introduction part. Or, a rising slope or an upward direction,
The incinerator according to 7, 8, or 9. 11. The incinerator according to claim 1, wherein the gasification melting furnace part can be separated vertically at a lower part. 12. The method of claim 1, 2, 3, 4, 5, 6, 7,
In the incinerator according to 8, 9, 10 or 11, a mass containing carbon as a main component is charged into the furnace bottom or substantially lower half of the lower part in the gasification melting furnace, and a predetermined range is placed above the mass. With the amount of incineration charged, the mass and incineration are flamelessly burned while supplying a flow rate of oxygen-containing gas at which the mass and incineration burn without flame. While performing gasification and melting, the gas generated in the gasification and melting furnace section is discharged from the gasification and melting furnace section through the generated gas discharge section, and the generated gas is burned in the generated gas combustion section, and in the gasification and melting furnace section. A method for using an incinerator, comprising discharging a molten material of a material to be incinerated in a molten state through a molten material discharge portion. 13. A method for using an incinerator according to claim 12, wherein a predetermined amount of a material containing silicon dioxide as a main component is charged into the gasification melting furnace together with the incineration material. .