JP2003004214A - Melting furnace for gasifying melting furnace facility and method of supplying combustion gas to the melting furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a melting furnace for gasifying melting furnace facility in which a combustion gas nozzle and a primary combustion chamber are not blocked by clinkers adhering to the internal surface of the top part of the furnace and which makes the stable continuous operation of a gasifying melting furnace facility possible, and to provide a method of supplying combustion gas to the furnace. SOLUTION: The gasifying melting furnace facility gasifies wastes in a gasifying furnace and melts the ash contained in the generated gas (b) into slag by introducing the gas (b) to the melting furnace 3. The furnace 3 is provided with a gas inlet 20 through which the gas (b) is introduced into the furnace 3 in the form of a swirling gas flow in its upper side wall, a plurality of combustion gas supply nozzles 24 and 25 which are opened in the side wall and top wall of the furnace 3, and a combustion gas blowing means which blows a combustion gas (f) into the swirling gas flow through the nozzles 24 and 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for treating wastes such as municipal wastes, industrial wastes, biomass wastes, medical wastes, automobile wastes such as waste tires or shredder dusts, and particularly, these Gas of the waste gas of the above and combustible product gas obtained by gasification is used in a swirling melting furnace to burn or gasify unburned carbon entrained in the product gas to form ash or molten slag. The present invention relates to a melting furnace of a chemical melting furnace facility and a method for charging a gas for burning the melting furnace.

[0002]

2. Description of the Related Art FIG. 1 is a diagram showing a structure of a main part of a gasification and melting facility having a waste heat boiler. In FIG. 1, 1 is a waste supply device, 2 is a fluidized bed gasification furnace, 3 is a swirling melting furnace composed of a melting furnace primary combustion chamber 4, a melting furnace secondary combustion chamber 5 and a melting furnace tertiary combustion chamber 6. , 7 is a waste heat boiler, 8 is an economizer, 9 is a bag filter, 10 is an exhaust gas reheater, 11 is a catalytic reaction tower, and 12 is a chimney.

In the gasification and melting facility having the above-mentioned structure, the waste a introduced into the fluidized bed gasification furnace 2 by the waste supply device 1 is a fluidized medium (sand etc.) c which is inserted from the bottom of the hearth. The combustible product gas b obtained by pyrolyzing and gasifying in the fluidized bed flowing with the converted air g is introduced into the swirling melting furnace 3 and mixed with the combustion gas f in the melting furnace primary combustion chamber 4. , Burning in the melting furnace secondary combustion chamber 5 at a high temperature of about 1350 ° C., burning char contained in the produced gas b to melt ash contained in the char, and further burning in the melting furnace tertiary combustion chamber 6. After being mixed with the gas f and burned, the high temperature combustion exhaust gas e at around 1350 ° C. is introduced into the waste heat boiler 7. In addition,
The non-gasified incombustible material d in the waste a is discharged to the outside from the lower part of the fluidized bed of the fluidized bed gasification furnace 2, and the ash content melted in the swirling melting furnace 3 is discharged from the swirling melting furnace 3 as molten slag h. Is discharged.

The high-temperature combustion exhaust gas e is cooled by passing through the waste heat boiler 7 and the economizer 8 to lower its temperature (around 160 ° C.), and the bag filter 9 removes dust such as molten fly ash contained therein. It Further exhaust gas reheater 1
Suitable temperature for catalytic reaction at 0 (200 ° C to 210 ° C)
Is reheated to NO in the combustion exhaust gas e in the catalytic reaction tower 11.
x and SOx are removed by reacting with ammonia, and discharged into the atmosphere through the chimney 12. On the other hand, the steam generated by the waste heat boiler 7 drives a turbine generator (not shown), and the obtained electric power is applied to the operating power source of the equipment of the gasification and melting furnace facility to save energy and run the facility. We are working to reduce costs.

In the above gasification and melting furnace facility, the generated gas b from the fluidized bed gasification furnace 2 is generated on the inner wall surface of the upper part of the melting furnace primary combustion chamber 4 of the swirling melting furnace 3 as shown in FIG. A high temperature duct 21 connected to the gas inlet 20 is introduced in the wall surface tangential direction to form a swirling flow. Then, the combustion gas f is swirled by the plurality of (eight in the figure) combustion gas supply nozzles 22 opening on the inner wall surface of the melting furnace primary combustion chamber 4 on the downstream side of the generated gas introduction port 20. It is supplied at a predetermined angle to the direction. As a result, the generated gas b is mixed with the combustion gas f and burns at a high temperature in the melting furnace secondary combustion chamber 5 and the melting furnace tertiary combustion chamber 6 as described above. Reference numeral 23 is an auxiliary burner.

As described above, the generated gas b is introduced while forming the upper swirl flow in the primary combustion chamber 4 of the melting furnace, and the plurality of combustion gas supply nozzles 22 provided on the downstream side of the generated gas introduction port 20 are used. The configuration for supplying the combustion gas f is shown in FIG.
As shown in (a) and (b), the combustion gas supply nozzle 2
There is a problem that the clinker K in the transition temperature region during the temperature rise process adheres and grows on the wall surface near 2 and the combustion gas supply nozzle 22 and the melting furnace primary combustion chamber 4 are closed, and the operation of the gasification melting furnace facility There was a problem that it interfered with.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and there is no clogging of the combustion air nozzle or the melting furnace primary combustion chamber due to the clinker adhering to the inner wall surface of the melting furnace. An object of the present invention is to provide a melting furnace of a gasification and melting furnace facility and a gas injection method for combustion of the melting furnace, which enables stable and continuous operation of the gasification and melting furnace facility.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 gasifies the waste in a gasification furnace, introduces the produced gas into a melting furnace and produces it by high temperature combustion. A melting furnace of a gasification melting furnace facility for melting and slagging ash in gas, the melting furnace introducing a generated gas from a generated gas introduction port provided on an upper side wall to form a swirling generated gas flow, A plurality of combustion gas supply nozzles opening to the side wall and the ceiling wall of the furnace are provided, and combustion gas blowing means for blowing the combustion gas from the combustion gas supply nozzle into the swirl generated gas stream is provided. .

As described above, the combustion gas blowing means is provided,
By injecting the combustion gas from the combustion gas supply nozzle that opens to the side wall and the ceiling wall of the melting furnace, the mixing of the generated gas and the combustion gas is promoted, and it is possible to raise the temperature quickly, and to increase the clinker adhesion temperature range. Since it can be minimized, it is possible to prevent the clinker from adhering to the wall surface.

According to the second aspect of the present invention, the waste is gasified in a gasification furnace, the produced gas produced is introduced into a melting furnace, and the ash content in the produced gas is melted and slagged by high-temperature combustion. In the melting furnace of the furnace equipment, the melting furnace forms a swirling product gas flow by introducing the product gas from the product gas introduction port provided on the side wall, and on the melting furnace side wall in the vicinity of the product gas introduction port,
It is characterized in that an opening combustion gas supply nozzle is provided, and a combustion gas injection unit for injecting the combustion gas into the generated gas flow introduced from the combustion gas supply nozzle is provided.

As described above, the combustion gas blowing means is provided,
By injecting the combustion gas from the combustion gas supply nozzle that opens on the side wall of the melting furnace near the generated gas inlet, mixing of the generated gas with the combustion gas is promoted, and it is possible to quickly raise the temperature and adhere the clinker. Since the temperature range can be minimized, the clinker can be prevented from adhering to the wall surface.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the melting furnace of the gasification and melting furnace facility described in (1), the combustion gas blowing means blows the combustion gas from the combustion gas supply nozzle in a swirl flow.

By injecting the combustion gas from the combustion gas supply nozzle in a swirl flow as described above, the mixing of the produced gas and the combustion gas is further promoted, and the temperature can be raised quickly and the clinker adhesion temperature range is increased. Minimized,
It is possible to further prevent the clinker from adhering.

The invention according to claim 4 is a gasification and melting method in which waste is gasified in a gasification furnace, the generated gas produced is introduced into a melting furnace, and the ash content in the produced gas is melted and slagged by high temperature combustion. A melting furnace combustion gas charging method for charging a combustion gas into a melting furnace of a furnace facility, wherein the melting furnace introduces a generated gas from a generated gas inlet provided on an upper side wall to form a swirl generated gas flow, Combustion gas is blown into the swirl-generated gas stream from a plurality of combustion gas supply nozzles that are opened in the side wall and ceiling wall of the melting furnace.

As described above, the combustion gas is blown into the swirl-produced gas flow from the plurality of combustion gas supply nozzles which are opened to the side wall and the ceiling wall of the melting furnace, so that the side wall and the ceiling wall of the primary combustion chamber of the melting furnace are blown. It is possible to prevent the clinker from sticking.

According to a fifth aspect of the present invention, there is provided a melting furnace combustion gas charging method for charging a combustion gas to the melting furnace of the gasification melting furnace facility according to the fourth aspect, wherein melting in the vicinity of the produced gas introduction port is performed. It is characterized in that the combustion gas is blown into the generated gas flow introduced from the combustion gas supply nozzle which is open to the side wall of the furnace.

As described above, by introducing the combustion gas from the combustion gas supply nozzle that opens to the side wall of the melting furnace near the generated gas introduction port, the side wall and the ceiling wall of the primary combustion chamber of the melting furnace further flow. Prevents clinker from adhering.

According to a sixth aspect of the present invention, a gasification and melting furnace for gasifying waste in a gasification furnace, introducing the generated gas into a melting furnace, and performing high temperature combustion to melt ash in the generated gas into molten slag. A melting furnace combustion gas charging method for charging a combustion gas to a melting furnace of a facility, the melting furnace comprising: a primary combustion chamber into which a generated gas is introduced; a secondary combustion chamber communicating with the primary combustion chamber; It is composed of a tertiary combustion chamber that communicates with the secondary combustion chamber, and the produced gas produced with an air ratio of 0.2 to 0.3 is introduced from the produced gas inlet provided on the upper side wall of the primary combustion chamber. Combustion gas blown into each combustion chamber so that the air ratio in the upper part of the combustion chamber is approximately 1.0 and thereafter the air ratio gradually increases to 1.0 to 1.5 as it moves to the secondary combustion chamber and the tertiary combustion chamber. It is characterized by adjusting the amount.

By setting the air ratio in the upper part of the primary combustion chamber to approximately 1.0 as described above, the temperature in the vicinity of the produced gas inlet can be secured at a high temperature (approximately 1300 ° C.) and the clinker adhesion temperature region can be minimized. It is possible (when the air ratio is 1.0 or more, the temperature of the combustion chamber decreases and the clinker attachment temperature region expands). In addition, by adjusting the amount of combustion gas blown into each combustion chamber so that the air ratio gradually increases from 1.0 to 1.5 as the secondary combustion chamber and the tertiary combustion chamber move, the generated gas and the generated gas are included. Unburned materials such as char can be completely burned, the temperature in the melting furnace can be maintained at a high temperature, and the molten slag conversion rate can be improved.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a diagram showing a configuration example of a melting furnace of a gasification melting furnace facility according to the present invention, FIG. 4 (a) is a side view, and FIG. 4 (b) is a plan view of a melting furnace primary combustion chamber of the melting furnace. Is. 4, the parts given the same reference numerals as those in FIG. 2 indicate the same or corresponding parts. The same applies to other drawings. The present melting furnace is a swirling melting furnace 3 having a melting furnace primary combustion chamber 4, a melting furnace secondary combustion chamber 5 and a melting furnace tertiary combustion chamber 6.
It is equipped with.

A high temperature duct 21 for guiding the generated gas b from the fluidized bed gasification furnace 2 (see FIG. 1) is connected to the generated gas inlet 20 provided on the upper side wall of the melting furnace 3, and the ceiling wall surface of the melting furnace 3 is connected. A plurality of (6 in the figure) combustion gas supply nozzles 24 with open ends are provided on the inner wall surface of the melting furnace in the vicinity of the product gas inlet 20 (4 in the figure).
(Individual) combustion gas supply nozzles 25 are provided.

In the swirling and melting furnace 3 having the above structure, a swirling flow of the generated gas b is formed in the melting furnace primary combustion chamber 4 from the high temperature duct 21 through the generated gas introduction port 20, and the tip portion is opened on the ceiling wall surface. The combustion gas f, that is, air or oxygen-enriched air or oxygen is blown from a plurality of combustion gas supply nozzles 24 in a direction perpendicular to the swirling flow of the generated gas b. Further, the generated gas b is blown into the inner wall surface of the primary combustion chamber 4 of the melting furnace at a predetermined angle with respect to the swirling flow direction of the generated gas b from a plurality of combustion gas supply nozzles 25 having open ends. In this way, by blowing the gas from the plurality of combustion gas supply nozzles 24 and 25, the tips of which are opened to the ceiling wall surface and the inner wall surface of the melting furnace primary combustion chamber 4, the generated gas b and the combustion gas are mixed. The melting temperature is accelerated and the temperature can be raised quickly, and the clinker adhesion temperature range can be minimized.
It is possible to prevent the clinker from adhering to the wall surface of the next combustion chamber 4.

FIG. 5 shows melting of the gasification melting furnace equipment according to the present invention.
It is a figure which shows the structural example of a melting furnace, FIG.5 (a) is a side view, FIG.
(B) is a plan view of a melting furnace primary combustion chamber of the melting furnace. Figure
5 differs from the melting furnace of FIG. 4 in that the generated gas is introduced.
The inner wall surface of the primary combustion chamber 4 of the melting furnace near one side of the mouth 20
Plural (three in the figure) combustion gas supply terminals with open ends
The point is that the sledge 26 is provided in the vertical direction. Combustion gas supply
Combustion gas f blown from the nozzle 26, that is, air or
Is oxygen-enriched air or oxygen traverses the product gas inlet 20
Is blown in. When the calorie of the produced gas is low,
N unrelated to combustion ₂Burns more efficiently
However, the temperature can be quickly raised to a high temperature. By this
In addition to the above effects of the melting furnace shown in FIG.
It is possible to prevent the clinker from adhering to the vicinity of 20.

FIG. 6 is a view showing a structural example of a melting furnace of the gasification melting furnace equipment according to the present invention, FIG. 6 (a) is a side view, and FIG.
(B) is a plan view of a melting furnace primary combustion chamber of the melting furnace. The melting furnace of FIG. 6 is different from the melting furnace of FIG. 5 in that a plurality of (6 in the figure) tip ends are opened on the inner wall surface of the melting furnace primary combustion chamber 4 in the vicinity of both sides of the produced gas introduction port 20. This is the point where the combustion gas supply nozzles 26 and 27 are provided in the vertical direction. The combustion gas f blown from the combustion gas supply nozzle 26,
That is, air or oxygen-rich air or oxygen is generated gas inlet 2
The gas supply nozzle for combustion 2 which is blown across 0
The combustion gas f blown from 7 is blown at a predetermined angle in the swirling flow direction of the generated gas b. Thus, in addition to the above-described effects of the melting furnace of FIG. 5, it is possible to more effectively prevent the clinker from adhering to the inner wall surface of the melting furnace primary combustion chamber 4 in the vicinity of the produced gas introduction port 20.

FIG. 7 is a diagram showing a structural example of a melting furnace of the gasification melting furnace facility according to the present invention, FIG. 7 (a) is a side view, and FIG.
(B) is a plan view of a melting furnace primary combustion chamber of the melting furnace. The melting furnace of FIG. 7 is different from the melting furnace of FIG. 6 in that the tip portion 27a of the combustion gas supply nozzle 27 is bent and the flow of the combustion gas blown from the combustion gas supply nozzle 27 is the generated gas introduction port 20. The point is that the direction of the flow of the generated gas b blown from is in the same direction. As a result, in addition to the above-described effects of the melting furnace of FIG. 6, it is possible to more effectively prevent the clinker from adhering to the inner wall surface of the melting furnace primary combustion chamber 4 in the vicinity of the produced gas introduction port 20.

8 and 9 show a combustion gas supply nozzle 2
It is a figure which shows the structural example of 5. As shown in the figure, the combustion gas supply nozzle 25 includes an outer pipe 25a, and the outer pipe 25a
Inner tube 25 with a swirler 25d attached to the tip
c is arranged. A blow-out pipe 25e is connected to the swirler 25d, and is arranged in an outer pipe 25a whose tip is open to the inner wall of the primary combustion chamber 4 of the melting furnace. Further, a combustion gas introduction pipe 25g for introducing the combustion gas f is connected to the outer pipe 25a, and the rear end is closed by a lid 25b.

As shown in FIGS. 9 (a) and 9 (b), the swirler 25d is a boss 25d-fixed to the tip of the inner pipe 25c.
3 and a ring plate 25d-1 arranged on the outer circumference of the boss 25d-3, and a swirl vane 25d for forming a swirl flow of the combustion gas between the boss 25d-3 and the ring plate 25d-1. -2 is attached. 9A and 9B show a side sectional view and a front view of the swirler 25d, respectively.

In the combustion gas supply nozzle 25 having the above structure, the combustion gas f introduced from the combustion gas introduction pipe 25g is guided to the swirler 25d through the gap between the outer pipe 25a and the inner pipe 25c, Swirler 25d swirl blade 25
A spiral swirling flow, that is, a swirl flow is generated by d-2, and is blown into the melting furnace primary combustion chamber 4 through the blowing pipe 25e.

As described above, since the combustion gas is blown as a swirl flow from the combustion gas supply nozzle 25, the mixing of the produced gas and the combustion gas is further promoted and the temperature can be raised quickly. The clinker adhesion temperature range can be minimized. It is preferable that the combustion gas supply nozzles 24, 26, and 27 not shown have the same configuration as the combustion gas supply nozzle 25.

In the above embodiment, the swirling melting furnace 3 is used.
Has been described by taking as an example a swirling melting furnace having a configuration in which the melting furnace primary combustion chamber 4, the melting furnace secondary combustion chamber 5, and the melting furnace tertiary combustion chamber 6 are arranged in a substantially U shape. However, the present invention can be applied to any melting furnace configured to introduce a generated gas from a generated gas inlet provided on a side wall of the melting furnace to form a swirling generated gas flow.

FIG. 10 is a view showing a combustion gas blowing system in each combustion chamber of the swirl melting furnace, and FIG. 10 (a) is a side sectional view.
FIG.10 (b) is an AA expanded sectional view. 30 is a blower for supplying the combustion gas f (mainly air),
From the blower 30, the damper 31 and the flow control valve 32,
Generated gas introduction port 2 via 33, 34, and 35, respectively.
0, the combustion chamber connected to it, that is, the melting furnace primary combustion chamber 4,
Combustion gas is supplied to the combustion chamber connected to the primary combustion chamber 4, that is, the melting furnace secondary combustion chamber 5, and the combustion chamber connected to the secondary combustion chamber, that is, the melting furnace tertiary combustion chamber 6.

As shown in FIG. 10B, the high temperature duct 2
The generated gas b having a flow rate of about 15 m / s to 25 m / s (preferably 18 m / s to 20 m / s) is blown from the generated gas introduction port 20 through the combustion gas supply nozzle 26. , 27, a flame 39 is formed in the melting furnace primary combustion chamber 4. Further, the air ratio A / R above the primary combustion chamber 4 of the melting furnace is A
R = 0.8-1.1 (preferably 0.9-1.0)
(Here, the air ratio is defined as 1.0, which is the amount of air required for the combustible material in the raw material waste to burn and completely change into H ₂ O and CO _2. Expressed as a ratio.)
The combustion gas f is blown in so that it becomes.

As a result, the temperature in the melting furnace primary combustion chamber 4 including the vicinity of the produced gas introduction port 20 can be maintained at a high temperature (about 1300 ° C. or higher), and the clinker adhesion temperature region of the furnace wall can be minimized. Can be suppressed. If the air ratio is more than 1.0, the amount of air that does not contribute to combustion increases, and the cooling effect of the air lowers the temperature of the combustion chamber and expands the clinker attachment temperature region, which is not preferable.

In addition, the air ratio A in the secondary combustion chamber 5 of the melting furnace 5
R is A · R = 0.9 to 1.3 (preferably 1.0 to 1.
2), the air ratio A / R in the tertiary combustion chamber 6 of the melting furnace is A / R =
The air ratio A / R is sequentially increased so as to be 1.2 to 1.7 (preferably 1.3 to 1.5). That is, the air ratio A / R is A / R = 0.9 to 1.3 (preferably 1.0 to 1.2) until the molten slag h is discharged from the slag discharge port 40.
With this, the temperature up to the slag discharge port 40 of the secondary combustion chamber 5 of the melting furnace can be maintained at the maximum temperature, and the molten slag h can be stably discharged downward. Further, in order to emit the combustion exhaust gas to the atmosphere outside the gasification and melting furnace, the air ratio should be 1.2 to 1.7 (preferably 1.3 to 1.5) in the high temperature state. Therefore, for example, the melting furnace 3
By increasing the air ratio A / R of the next combustion chamber 6 to A / R = 1.3 to 1.5, unburned CO is effectively burned, and the amount of waste supply and qualitative fluctuations occur. In addition, the pyrolysis gas and char can be completely burned without running out of combustion air.

As the air ratio A / R in the melting furnace 3 is transferred to the melting furnace primary combustion chamber 4, the melting furnace secondary combustion chamber 5 and the melting furnace tertiary combustion chamber 6 in this way, A / R = 1. By gradually increasing the flow rate up to A · R = 1.5, an excessive supply of the combustion gas f absorbs fluctuations in the amount of waste supplied, minimizes the decrease in the furnace temperature, and reduces the product gas b. Also, unburned materials such as char contained therein can be completely burned, the temperature in the melting furnace 3 can be maintained at a high temperature, and the molten slag conversion rate can be improved.

Thermometers 36, 37 and 38 are respectively provided on the top furnace wall of the melting furnace primary combustion chamber 4 of the melting furnace 3, the furnace wall of the melting furnace secondary combustion chamber 5 and the furnace wall of the melting furnace tertiary combustion chamber 6. Is provided,
The temperature is to be measured. These thermometers 3
Thermocouples and radiation thermometers are used as 6, 37 and 38. In addition, from the temperature of the exhaust gas discharged from the melting furnace 3,
It can also be calculated and calculated using the heat recovery amount and the cooling air amount. The temperature obtained by these measurements or calculations can be used to appropriately control the range of the air ratio.

[0037]

As described above, according to the invention described in each claim, the following excellent effects can be obtained.

According to the first aspect of the invention, the combustion gas blowing means is provided, and the combustion gas is blown from the combustion gas supply nozzles which are opened to the side wall and the ceiling wall of the primary combustion chamber of the melting furnace. Mixing of the generated gas and the combustion gas is further promoted, the temperature can be raised quickly, clinker can be prevented from adhering, and stable continuous operation of the gasification and melting furnace facility can be achieved.

According to the second aspect of the present invention, the combustion gas blowing means is provided, and the combustion gas is blown from the combustion gas supply nozzle opening in the side wall of the melting furnace in the vicinity of the generated gas introduction port to generate the combustion gas. The mixing of the gas and the combustion gas is promoted, the temperature can be raised quickly, and the clinker adhesion temperature range can be minimized, so the clinker can be prevented from adhering to the wall surface and the gasification melting furnace facility Stable continuous operation is possible.

According to the third aspect of the invention, by blowing the combustion gas from the combustion gas supply nozzle in a swirl flow, the mixing of the produced gas and the combustion gas is further promoted, and the temperature is rapidly raised. This makes it possible to minimize the clinker adhesion temperature range and further prevent clinker adhesion.

According to the fourth aspect of the present invention, the combustion gas is blown into the swirl-generated gas flow from the plurality of combustion gas supply nozzles opened on the side wall and the ceiling wall of the melting furnace.
It is possible to prevent the clinker from adhering to the side wall of the melting furnace and the ceiling wall.

According to the fifth aspect of the present invention, the combustion gas is introduced from the combustion gas supply nozzle that opens in the melting furnace near the produced gas introduction port, so that the side wall and the ceiling wall of the melting furnace are further introduced. Prevents clinker from adhering.

According to the sixth aspect of the invention, by setting the air ratio in the upper part of the primary combustion chamber to approximately 1.0, the temperature near the inlet of the produced gas can be kept at a high temperature (approximately 1300 ° C.) and the clinker adheres. The temperature range can be minimized. In addition, the amount of combustion gas blown into each combustion chamber is adjusted so that the air ratio sequentially increases from 1.0 to 1.5 as the air moves to the secondary combustion chamber and the tertiary combustion chamber. It is possible to completely combust unburned substances such as the above, and to maintain the temperature in the melting furnace at a high temperature, thereby improving the rate of molten slag formation.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a main part of a gasification melting furnace facility having a conventional waste heat boiler.

2A and 2B are views showing a configuration of a melting furnace of a conventional gasification melting furnace facility, FIG. 2A is a side view, and FIG. 2B is a plan view of a melting furnace primary combustion chamber of the melting furnace. .

FIG. 3 is a diagram showing a state in which a clinker is attached to a side wall of a primary combustion chamber of a melting furnace of a melting furnace of a conventional gasification melting furnace facility.

4A and 4B are views showing a configuration of a melting furnace of a gasification melting furnace facility according to the present invention, FIG. 4A is a side view, and FIG. 4B is a plan view of a melting furnace primary combustion chamber of the melting furnace. Is.

5A and 5B are views showing a structure of a melting furnace of a gasification melting furnace facility according to the present invention, FIG. 5A is a side view, and FIG. 5B is a plan view of a melting furnace primary combustion chamber of the melting furnace. Is.

6A and 6B are views showing a configuration of a melting furnace of a gasification melting furnace facility according to the present invention, FIG. 6A is a side view, and FIG. 6B is a plan view of a melting furnace primary combustion chamber of the melting furnace. Is.

7A and 7B are views showing a configuration of a melting furnace of a gasification melting furnace facility according to the present invention, FIG. 7A is a side view, and FIG. 7B is a plan view of a melting furnace primary combustion chamber of the melting furnace. Is.

FIG. 8 is a diagram showing a configuration example of a combustion gas supply nozzle used in the melting furnace of the gasification melting furnace equipment according to the present invention.

9 (a) and 9 (b) are a side sectional view and a front view of a swirler portion of the combustion gas supply nozzle shown in FIG. 8, respectively.

FIG. 10 is a view showing a combustion gas blowing system in each combustion chamber of the melting furnace of the gasification and melting furnace facility according to the present invention.
10A is a side sectional view, and FIG. 10B is a sectional view taken along line AA.

[Explanation of symbols]

3 Swirl melting furnace 4 Melting furnace primary combustion chamber 5 Melting furnace secondary combustion chamber 6 Third furnace of melting furnace 20 Product gas inlet 21 high temperature duct 22 Combustion gas supply nozzle 23 Burning Burner 24 Combustion gas supply nozzle 25 Combustion gas supply nozzle 26 Combustion gas supply nozzle 27 Combustion gas supply nozzle 30 blowers 31 damper 32-35 Flow control valve 36-38 radiation thermometer 39 flame 40 Slag outlet

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F23G 5/44 F23G 5/50 H 4K063 5/50 F23J 1/00 B F23J 1/00 F27D 7/02 A F27D 7/02 B09B 3/00 303L (72) Inventor Yoko Cho 11-11 Haneda Asahi-cho, Ota-ku, Tokyo F-term in EBARA CORPORATION (reference) 3K061 AA16 AB02 AB03 AC01 AC13 AC14 AC17 BA04 BA07 CA01 DB15 NB03 3K062 AA16 AB03 AC03 BB03 DB06 DB08 DB09 3K065 AA16 AB02 AB03 AC01 AC17 BA04 GA03 GA08 3K078 AA04 BA03 CA02 CA07 CA09 CA11 CA18 CA21 CA24 4D004 AA11 AA26 AA28 CA13 DA08 A13 CA08 CA13 CA08 CA13 CA08 CA27 CA20 DA27 CA20 CA29

Claims (6)

[Claims] 1. A melting furnace of a gasification and melting furnace facility for gasifying waste in a gasification furnace, introducing the generated gas into a melting furnace, and melting the ash in the generated gas into molten slag by high temperature combustion. In the melting furnace, the generated gas is introduced from a generated gas introduction port provided on an upper side wall to form a swirling generated gas flow, and a plurality of combustion gas supply nozzles opening to the side wall and the ceiling wall of the melting furnace are provided. A melting furnace of a gasification melting furnace facility, characterized by comprising combustion gas blowing means for blowing combustion gas from the combustion gas supply nozzle into the swirl generated gas stream. 2. A melting furnace of a gasification and melting furnace facility for gasifying waste in a gasification furnace, introducing the generated gas into a melting furnace, and melting the ash in the generated gas into molten slag by high temperature combustion. In the melting furnace, the generated gas is introduced from a generated gas introduction port provided on a side wall to form a swirling generated gas flow, and a combustion gas supply nozzle is opened on a side wall of the melting furnace near the generated gas introduction port. And a combustion gas blowing means for blowing a combustion gas into the produced gas flow introduced from the combustion gas supply nozzle, the melting furnace of the gasification melting furnace facility. 3. The melting furnace of the gasification melting furnace facility according to claim 1, wherein the combustion gas blowing means blows combustion gas from the combustion gas supply nozzle in a swirl flow. Gasification melting furnace equipment melting furnace. 4. The waste gas is gasified in a gasification furnace, the generated gas is introduced into a melting furnace, and the ash in the generated gas is melted into slag by high temperature combustion. A melting furnace combustion gas charging method of charging a working gas, wherein the melting furnace introduces the generated gas from a generated gas introduction port provided in an upper side wall to form a swirling generated gas flow, and a side wall of the melting furnace. And a method for introducing a gas for combustion in a melting furnace of a gasification melting furnace facility, characterized in that the combustion gas is blown into the swirl-generated gas flow from a plurality of combustion gas supply nozzles that are open to the ceiling wall. 5. The melting furnace combustion gas charging method for charging a combustion gas to the melting furnace of the gasification melting furnace facility according to claim 4, wherein the combustion opening to the side wall of the melting furnace near the generated gas introduction port. A method for charging gas for melting furnace combustion in a gasification melting furnace facility, characterized in that a combustion gas is blown into the produced gas flow introduced from the gas supply nozzle. 6. The waste is gasified in a gasification furnace, the produced gas produced is introduced into a melting furnace, and the ash in the produced gas is melted into slag by high temperature combustion, and is burned in a melting furnace of a gasification melting furnace facility. A method for introducing a gas for combustion into a melting furnace, wherein the melting furnace comprises a primary combustion chamber into which the generated gas is introduced, a secondary combustion chamber communicating with the primary combustion chamber, and a secondary combustion chamber. And a third combustion chamber communicating with the first combustion chamber, wherein the generated gas generated at an air ratio of 0.2 to 0.3 is introduced from a generated gas inlet provided on an upper side wall of the primary combustion chamber. Set the upper air ratio to approximately 1.0, and then 2
A gasification melting furnace facility characterized in that the amount of combustion gas blown into each combustion chamber is adjusted so that the air ratio gradually rises to 1.0 to 1.5 as it moves to the secondary combustion chamber and the tertiary combustion chamber. Gas injection method for melting furnace combustion.