JP2002048320A - Thermal decomposition gas combustor, and waste treatment apparatus equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal decomposition gas combustor and a waste treatment apparatus capable of reuse of heat in a waste treatment and of reducing an environment load increase component in waste gas. SOLUTION: A thermal decomposition gas combustor 1 includes an injection outlet 5a for injecting thermal decomposition gas 27, an injection outlet 4a for injecting a starting fuel 29 for previously forming a flame in the thermal decomposition gas combustor 1 prior to injection of thermal decomposition gas, and a primary air injection outlet 6a required for combusting thermal decomposition gas or a starting fuel. There is further provided a flame stabilizing unit 32 configured into a partial cone extending radially in the direction of the primary air injection outlet 6a from a peripheral edge of the thermal decomposition gas injection outlet 5a. A secondary air nozzle 10 is further provided or further combusting primary waste gas after the combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the pyrolysis of general waste such as municipal waste discharged from homes and offices and industrial waste discharged from business establishments in a pyrolysis furnace. More particularly, the present invention relates to a pyrolysis gas combustor and a waste processing apparatus that burn pyrolysis gas generated in a pyrolysis furnace and use the combustion heat for drying waste or heating the pyrolysis furnace.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Hei 10-281422 discloses an apparatus for burning pyrolysis gas generated from waste in an atmosphere containing less oxygen. This technology is a method of heating waste such as municipal solid waste and supplying the generated pyrolysis gas and pyrolysis carbon together with air to a melting furnace for melting treatment. The pyrolysis carbon is burned at an air ratio of 1 or more. Then, the generated combustion exhaust gas and the pyrolysis gas are burned at an air ratio of 1 or less, and the generated combustion exhaust gas is brought into contact.

[0003] This technique, pyrolytic carbon, the pyrolysis gas is successively burned in a furnace provided in multiple stages, since the pyrolysis gas is combusted at an air ratio of 1 or less combustion conditions, H ₂ in the combustion exhaust _gas, CO , NH n, _HCN, there are hydrocarbon radicals such as CH _m, these species pyrolytic carbon is reducing NOx to be generated when burned in one or more hot air ratio, the NOx concentration in the exhaust gas It can be reduced. Further, by injecting air into combustion exhaust gas in an incomplete combustion state having an air ratio of 1 or less, complete combustion can be achieved, and organic chlorine compounds in the exhaust gas can be reduced.

[0004] Another technique of this kind is disclosed in Japanese Unexamined Patent Publication No.
There is a technique described in Japanese Patent Application Publication No. 1-237020. This technology relates to a waste melting furnace, in which a combustion device is provided in a main chamber for melting and processing an object to be treated, and a post-combustion chamber is provided for completely combusting combustion exhaust gas from the main chamber. While suppressing the generation and emission of nitrogen oxides and carbon monoxide.

In order to achieve this object, the concentration of oxygen discharged in the exhaust gas from the post-combustion chamber is detected, and the theoretical air amount is calculated based on the detected oxygen concentration and the total amount of air supplied to the main chamber and the post-combustion chamber. The target main room air amount is calculated based on the target main room air amount and the main room air amount is adjusted based on the target main room air amount to maintain the main room within a predetermined air ratio. Then, the amount of fuel supplied to the burner section is adjusted, and the burner air control valve is proportionally controlled so as to have a predetermined burner air ratio (0.8 to 1.0) with respect to the fuel supply amount.

Further, there is provided an apparatus for thermally decomposing waste in an atmosphere containing less oxygen by this kind of waste treatment technology to convert the waste into a pyrolysis residue mainly composed of a pyrolysis gas and a carbon component solid, and An apparatus and a system having a combustion-melting furnace which burns the pyrolysis residue at a high temperature, incinerates it, and then turns it into molten slag are disclosed in JP-B-6-056253, JP-T-7-5037.
No. 43, as known. In these examples, the pyrolysis gas is led directly into the combustion melting furnace as a heat source for burning and melting the pyrolysis residue, and the pyrolysis furnace (pyrolysis reactor) is not heated by the combustion heat of the pyrolysis gas.

[0007] As a heating method of a waste pyrolysis furnace, a direct heating method and an indirect heating method are used. The direct heating method often employs a method in which the pyrolysis gas is partially burned and returned to the pyrolysis furnace, making it extremely difficult to control the pyrolysis process that must be performed in an oxygen-free atmosphere. There is.

On the other hand, in the indirect heating method, there is a method in which a heat medium such as heated air is circulated through a jacket portion or a heat transfer tube provided on the outer wall of a pyrolysis furnace (Japanese Patent Application Laid-Open Nos. 10-2525 and 10-2528). Such). It is easy to control the oxygen concentration in the pyrolysis atmosphere with the indirect heating method, but the heat exchanger that exchanges heat with the heating medium that heats the jacket of the pyrolysis furnace needs materials that can withstand corrosion. It tends to be expensive.

In addition, the indirect heating method is not self-sufficient,
Although it is conceivable to supply a heat source from outside the system, the cost tends to be high because a separate heat source is provided outside the system or auxiliary equipment is provided. The indirect heating method, in which the pyrolysis gas generated in the pyrolysis furnace is burned and the heat of the pyrolysis furnace is heated using the combustion heat, is more expensive than the method in which a heat source is supplied entirely from outside the system. This is advantageous in that it is possible to prevent

[0010]

However, in the above-mentioned prior art, there is a problem that the configuration of the furnace is multi-stage and complicated, and the theoretical air amount and the target main air amount are determined based on the oxygen concentration discharged from the oxygen detecting means. It is necessary to calculate the amount of room air, and there has been a problem that the configuration becomes complicated and the control becomes complicated. Furthermore, in the above-mentioned prior art, a configuration for stabilizing primary combustion and a configuration for efficiently performing secondary combustion are not described. The waste is thermally decomposed, the pyrolysis gas generated by the pyrolysis is efficiently burned, and the exhaust gas is used as a heat source for heating the pyrolysis furnace. There is no pyrolysis gas combustor or waste treatment device that can reuse NOx, reduce NOx and harmful components in exhaust gas, and achieve cost reduction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to simplify the construction and to efficiently burn pyrolysis gas and the like. Pyrolysis gas combustor, which can sufficiently reduce the environmental load increase component in the exhaust gas of pyrolysis gas combustion to below the range that does not increase the environmental load, and can achieve cost reduction, and waste treatment It is to provide a device.

[0012]

In order to achieve the above object,
The pyrolysis gas combustor according to the present invention is a pyrolysis gas combustor that burns pyrolysis gas converted from waste,
An ejection port for ejecting the starting fuel, an ejection port coaxially located on the outer periphery of the starting fuel ejection port and ejecting the pyrolysis gas, and the pyrolysis gas or the starting gas located around the two ejection ports. A primary air jet for burning fuel for
A flame holder having a partial conical shape extending radially from the periphery of the pyrolysis gas outlet to the primary air outlet is provided.

According to this structure, before the pyrolysis gas is blown out, the starting fuel is blown out to form a flame in the pyrolysis gas combustor in advance. Since the periphery of the flow path of the decomposition gas is covered with the primary air flow path, the state of the flame is stabilized, and the pyrolysis gas can be efficiently burned.

As a preferred specific embodiment of the pyrolysis gas combustor according to the present invention, the pyrolysis gas and the primary air are mixed in a direction perpendicular to the center axis of a flame formed by mixing the two.
A secondary air outlet for secondary combustion is provided. According to this configuration, the primary exhaust gas after the pyrolysis gas or the starting fuel is mixed with the primary air and burned can be further secondary-burned by the secondary air. Can be increased, and harmful components of the exhaust gas can be reduced.

Further, as another preferred specific embodiment of the pyrolysis gas combustor according to the present invention, a plurality of the primary air jets are formed at equal intervals around the pyrolysis gas jets. It is characterized by having been done. According to this configuration, the periphery of the pyrolysis gas can be uniformly covered with the primary air layer, and the primary combustion can be performed efficiently.

Further, a waste treatment apparatus according to the present invention includes the above-described pyrolysis gas combustion apparatus and a pyrolysis furnace for converting waste into pyrolysis gas and mainly non-volatile pyrolysis residues. The pyrolysis furnace is heated by heat generated by burning the pyrolysis gas in the pyrolysis gas combustor. According to this configuration, the pyrolysis furnace can be heated by the combustion heat of the pyrolysis gas, so that waste can be efficiently treated and the environmental load can be reduced. Also, a heat medium for indirectly heating the pyrolysis furnace and a heat exchanger for exchanging heat are unnecessary,
The configuration can be simplified. Further, there is no need to provide a heat source for heating the pyrolysis furnace outside the system, which is advantageous in terms of cost.

That is, in the waste treatment apparatus using the present invention, waste containing water is first dried in a drying furnace and then sent to a pyrolysis furnace to be kept in an oxygen-free atmosphere or an oxygen-poor atmosphere. The pyrolysis gas is generated by heating the waste in the pyrolysis furnace. The pyrolysis gas is sent to the pyrolysis gas combustor according to the present invention, where it is subjected to primary combustion in an oxygen-low state with an air ratio of 1 or less, and then to secondary combustion with secondary air. Air is sent to the heating outer cylinder of the decomposition furnace. By the pyrolysis gas combustor, the above-mentioned object can be achieved by the optimal air amount, air flow rate, pyrolysis gas flow rate, pyrolysis gas amount, and optimal mixing conditions of the combustion air with which the pyrolysis gas is burned. .

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pyrolysis gas combustor according to the present invention
An embodiment will be described with reference to the drawings. First, a waste treatment apparatus using the pyrolysis gas combustor of the present invention will be described using an example of a gasification and melting system shown in FIG. The gasification and melting system includes a waste treatment apparatus S that pyrolyzes waste to convert it into pyrolysis residue (char) and pyrolysis gas, and a combustion and melting furnace that burns the char. First, the waste disposal apparatus S will be described. The waste 21 is crushed by a crusher 22 and then put into a drying furnace 23 and dried by drying air 24 of about 300 ° C. sent to the drying furnace 23 to become a dried waste 25 having a water content of about 10% or less. It is sent to the pyrolysis furnace 26. The dried waste 25 is stored in the pyrolysis furnace 26 in an oxygen-free state or an oxygen-low atmosphere state for about 50 hours.
It is heated at 0 ° C. and pyrolyzed, separated into a pyrolysis gas 27 and a pyrolysis residue 28 and discharged from the pyrolysis furnace 26. In the operation of the pyrolysis furnace 26, the starting fuel 29 is first sent into the pyrolysis gas combustor 1, mixed with primary air, ignited, and heated.

Exhaust gas 2 from the pyrolysis gas combustor 1
01 is sent into the outer cylinder portion 11 which is a jacket portion of the pyrolysis furnace 26, and heats the pyrolysis furnace 26 main body to form the exhaust gas 202.
Becomes Exhaust gas 202 comprises drying air 24 and exhaust gas 2
Branched to 03. After the waste 21 is sent to the pyrolysis furnace 26 via the drying furnace 23, the gas burned in the pyrolysis gas combustor 1 is temporarily replaced with the pyrolysis gas 27 from the starting fuel 29. After heating the drying furnace 23, the drying air 24 joins with the exhaust gas 203 by the blower 204.

The pyrolysis residue (char) 28 discharged from the pyrolysis furnace 26 is sent to a char separator 207 via a char cooler 205 and a char crusher 206. The non-combustible portion 208 is separated from the pyrolysis residue 28, and the char 209 having a high flammable content is stored in the char hopper 210. The char 209 is conveyed to the combustion melting furnace 211 together with the heated air 212 and burned at any time. The molten slag and exhaust gas 215 are discharged from the combustion melting furnace 211, and the molten slag is cooled by the slag cooling water 220 and discharged as solid slag 213. The exhaust gas 215 is supplied to the heat exchangers 216A and 216.
After passing through B, the fly ash 218 is separated by the bag filter 217 and then exhausted from the chimney 219. Pre-stage heat exchanger 216A
Is connected to a turbine 221 such as a generator. Further, the heat exchanger 216 </ b> B at the subsequent stage serves as a heat source of the heated air 212 of the combustion melting furnace 211.

Next, the pyrolysis gas combustor 1 according to the present invention will be described with reference to FIGS. FIG. 2A is a cross-sectional view showing a schematic configuration of a pyrolysis gas combustor, and FIG.
3A is an enlarged view taken in the direction of the arrow A in FIG. 2A, FIG. 3A is an enlarged sectional view of the gas combustion part in FIG. 2, and FIG. 3B is a schematic perspective view of the flame stabilizer. The pyrolysis gas combustor 1 mainly includes a gas introduction unit 2 and a gas combustion unit 3. In the gas introduction section 2, a pyrolysis gas pipe 5 is coaxially installed outside the starting fuel pipe 4 of the pyrolysis gas combustor, and a primary combustion air pipe 6 is installed outside the pyrolysis gas pipe 5. A pyrolysis gas heater 7 is installed on the outer periphery of the pyrolysis gas pipe 5 and is sent into the pyrolysis gas combustor 1 while maintaining the temperature of the pyrolysis gas sent from the pyrolysis furnace 26 at about 400 ° C. or higher. You. The primary combustion air pipe 6 has a primary air 10 for burning the pyrolysis gas 27 and the starting fuel 29.
1 is supplied, and it is not preferable to cool the pyrolysis gas 27. Therefore, a heater 8 for keeping heat is also provided on the outer peripheral surface of the primary combustion air pipe 6. Primary combustion air pipe 6
Is also preferably maintained at about 400 ° C. or higher.

The gas introduction section 2 of the pyrolysis gas combustor 1 is separated from the gas combustion section 3 by a refractory wall 1a, and an injection port 4a of a starting fuel pipe 4 is provided at the center of the refractory wall portion.
The jet port 5a of the pyrolysis gas pipe 5 is located on the outer periphery. Around the injection port 5a, six injection ports 6a of the primary combustion air pipe 6 are formed at equal intervals on a circumference concentric with the injection ports 4a and 5a in this example. Therefore, the starting fuel 29 is ejected from the ejection port 4a to the gas combustion section 3, the pyrolysis gas 27 is ejected from the ejection port 5a on the outer periphery of the ejection port 4a to the gas combustion section 3, and the primary air 101 is discharged to the outer periphery thereof. Similarly, the gas is jetted to the gas combustion unit 3 from the jet ports 6a formed at equal intervals. The number of primary air outlets 6a is not limited to six, but is preferably formed at equal intervals on the circumference.

Here, the primary air nozzle 31 with a flame stabilizer for changing the direction of the primary air flow will be described. In the direction from the periphery of the pyrolysis gas jet 5a to the primary air jet 6a, there is provided a partially conical flame stabilizer 32 which spreads radially. As shown in FIG. 3B, the flame stabilizer 32 has a partially conical shape, that is, a cone-shaped portion 3 having an outer peripheral surface of a truncated cone.
2a and three supports 32b, which are fixed to the outer periphery of the thermal decomposition gas injection port 5a. The cone-shaped portion 32a on the outer peripheral surface of the flame stabilizer 32 gradually expands from the support 32b toward the gas combustion portion 3, and the outermost peripheral portion extends to near the center of the circular shape of the primary air outlet 6a. In this way, the primary air nozzle 31 with a flame stabilizer is configured to spread and flow the primary air outward.

The gas combustion section 3 mainly comprises a combustor outer cylinder 9 and an outer cylinder inner wall heat insulator 18. A secondary air nozzle 10 is provided in the combustor outer cylinder 9, and the outer cylinder 9 has the opposite side of the secondary air nozzle 10 connected to the outer cylinder portion 11 of the pyrolysis furnace 26.
Therefore, the exhaust gas from the pyrolysis gas combustor 1 is introduced into the outer cylinder 11 of the pyrolysis furnace 26 to heat the pyrolysis furnace 26. A flame monitoring monitor 1 is installed on the outer cylinder 9 of the combustor.
2, a thermometer 13, a gas analyzer 14, and the like are also provided.
From the flame monitoring monitor 12, the ignition determination inside the gas combustion part 3 and the properties of the flame are monitored and controlled. The secondary air nozzle 10 is arranged so that its central axis is orthogonal to the central axis of the pyrolysis gas pipe, and the secondary air 102 is mixed in a direction orthogonal to the flame in which the pyrolysis gas 27 is mixed with the primary air 101 and burned. Is supplied.

In FIG. 3, a pyrolysis gas pipe 5 is provided with a nitrogen gas introduction pipe 36. The introduction pipe 36 is for introducing a nitrogen content of a simulation gas described later. The primary combustion air pipe 6 is provided with a flame monitoring window 37 for monitoring the state of the flame at the outlet 6a of the primary air 101. An ignition plug 38 is provided on the side of the gas combustion section 3 of the primary air jet port 6a.
And ignition of the starting fuel 29. On the opposite side of the ignition plug 38 of the gas combustion part 3, a thermometer 39 is installed.

The present embodiment has the above-described configuration, and its operation will be described below. Primary air nozzle 31 with flame stabilizer
As described above, is provided on the gas combustion section 3 side of the primary air injection port 6a of the pyrolysis gas combustor 1. The primary air nozzle 31 with a flame stabilizer is a hole provided to allow the air passing through the primary air jet port 6a to spread outward and to jet to the gas combustion unit 3 side. As mentioned above, it has six.

The overall shape of the flame stabilizer 32 in this embodiment is provided with a cone-shaped portion 32a. At the center of the cone, the pyrolysis gas 27 flows from the jet port 5a as shown by an arrow 33. Since the cone-shaped portion 32a of the flame stabilizer 32 is spread so as to shield the primary air outlet 6a, the primary air is
Are mixed at the periphery 35 of the pyrolysis gas flowing along the arrow 33 at the center. Therefore, the pyrolysis gas is covered with the primary air flow path, the flame becomes stable and burns efficiently, and the combustion of the pyrolysis gas and the primary air (first-stage combustion) has an air ratio of 1 Combustion under the following excess fuel conditions is possible.

Then, the primary exhaust gas of the pyrolysis gas burned by the primary air nozzle 31 with the flame stabilizer according to the present invention is used in the downstream region of the gas combustion section 3 for recombustion necessary for complete combustion again. (Second stage combustion) by supplying the secondary air 102 in the direction orthogonal to the central axis of the flame of the primary air, that is, the direction of the arrow 33, thereby achieving efficient combustion. For this reason, the combustion temperature distribution becomes smooth, and thermal N
Ox generation can be suppressed. Further, FuelNOx nitrogen content majority of fuel in the combustion of the first stage is converted to N ₂
Can be reduced, and the NOx concentration can be reduced.

The pyrolysis gas 27 was burned in the pyrolysis gas combustor 1 using the primary air nozzle 31 with a flame holder, and the CO concentration and NOx concentration of the exhaust gas from the pyrolysis gas combustor 1 were measured. The results are shown in FIG. FIG. 4 shows the relationship between the ammonia concentration in the simulation gas of the waste pyrolysis gas and the NOx concentration in the combustion exhaust gas. In the present embodiment, a mixed gas of nitrogen and LPG and a mixed gas of nitrogen, LPG and ammonia simulating a pyrolysis gas are used. The reason for using the simulated gas is that the gas composition of the actual waste pyrolysis gas fluctuates, making it difficult to clarify the relationship with the nozzle structure.

The simulated gas, ammonia, is contained in the pyrolysis gas.
fuel is a source of NOx and nitrogen is used to adjust the simulated gas to a calorific value equivalent to the calorific value of the actual waste pyrolysis gas.
Meaningful as a source of malNOx. In the figure, a curve 41 is a measurement example using the nozzle with a flame stabilizer of the present invention, and a curve 4
2 shows the result when a nozzle without a flame stabilizer was used.
As shown by the curves 41 and 42, in the case of the nozzle with a flame stabilizer of the present invention, the NOx
The effect that the concentration is reduced by about 35% and the harmful components of the exhaust gas can be reduced by the primary air nozzle 31 with a flame holder is clear.

FIG. 5 shows the stable combustion region of the flame in relation to the primary air ratio and the calorific value of the simulated gas of the raw material. In the figure, boundary line 5
Numeral 0 is a line indicating the boundary between the stable combustion range 51 and the misfire range 52 of the simulation gas in place of the pyrolysis gas by the nozzle with the flame stabilizer according to the present invention. A boundary line 55 is a line indicating a boundary between the stable combustion range 53 and the misfire range 54 by the nozzle without the flame stabilizer. The stable combustion range 51 in the present invention is wider than the stable combustion range 53 in a nozzle without a flame stabilizer, and can be burned in a wide range of conditions. Admitted.

[0032]

According to the present invention, since the primary air nozzle provided with the flame stabilizer is installed in the pyrolysis gas combustor, the periphery of the flow path of the pyrolysis gas is covered by the primary air flow path. As a result, the flame becomes stable, and the pyrolysis gas can be efficiently burned. For this reason, by using the waste treatment equipment, the waste can be dried efficiently in the drying furnace and the temperature of the pyrolysis furnace can be raised efficiently by heating the outer shell of the pyrolysis furnace, and the waste can be treated efficiently, resulting in environmental load. Can be reduced. Further, the configuration can be simplified and the cost can be reduced.

Further, after the pyrolysis gas is burned in the first stage under the condition of a low air ratio, air is fed further downstream so as to be orthogonal to the primary exhaust gas, so that harmful components of the exhaust gas can be reduced. The amount of heat generated by combustion can be increased. Such a combustion system is generally referred to as a two-stage combustion system, in which a first stage performs an excessive fuel combustion by suppressing an air flow rate, and a second stage performs a fuel-lean combustion by newly blowing in combustion air. In such a combustion method, the temperature distribution becomes smooth and the maximum temperature can be kept low.
Thermal NOx generation can be suppressed. In the first stage of combustion over the combustion, since most of the N (nitrogen) content in the fuel is converted into N _2, it becomes possible to reduce the Fuel NOx. Therefore, according to the present invention, NO
The x concentration can be reduced, and combustion can be performed in a wide range of combustion conditions.

Further, the number of primary air jets is formed around the pyrolysis gas jets at equal intervals so that the circumference of the pyrolysis gas is evenly covered with the primary air layer. Thus, the flame becomes more stable, the combustion can be performed efficiently, and the calorific value can be increased. The waste treatment apparatus can heat the pyrolysis furnace by the exhaust heat of the pyrolysis gas, does not need to provide a heat source outside the system, can simplify the configuration, and can reduce costs including maintenance costs. Further, harmful components of the exhaust gas can be reduced, and the environmental load can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a gasification and melting system including a waste treatment apparatus using a pyrolysis gas combustor of the present invention.

FIG. 2A is a cross-sectional view showing a schematic structure of a pyrolysis gas combustor according to the present invention, and FIG. 2B is an enlarged view of FIG.

FIG. 3A is an enlarged cross-sectional view of a gas introduction unit in FIG. 2;
(B) is a schematic perspective view of a flame stabilizer.

FIG. 4 is a diagram showing the relationship between the concentration of ammonia in LPG and the concentration of NOx in combustion exhaust gas.

FIG. 5 is a diagram showing a relationship between a primary air ratio for pyrolysis gas combustion and a lower calorific value of a pyrolysis gas simulation gas (flame holding performance range).

[Explanation of symbols]

S: Waste treatment apparatus, 1: Pyrolysis gas combustor, 2: Gas introduction section, 3: Gas combustion section, 4: Fuel pipe for starting, 4a: Fuel injection port for starting, 5: Pyrolysis gas pipe, 5a : Pyrolysis gas jet, 6: primary combustion air pipe, 6a: primary air jet,
7: pyrolysis gas heater, 8: primary combustion air heater, 9: combustor outer cylinder, 10: secondary air nozzle, 11: pyrolysis furnace outer cylinder, 12: flame monitoring monitor, 13: thermometer , 14: Gas analyzer, 18: Insulation material for inner wall of outer cylinder, 21:
Waste, 22: crusher, 23: drying furnace, 24: drying air, 25: dry waste, 26: gasification furnace, 27: pyrolysis gas, 28: pyrolysis residue, 29: starting fuel, 101 :
Primary air, 102: secondary air, 201: flue gas, 2
02: exhaust gas, 203: exhaust gas, 204: blower,
205: char cooler, 206: char crusher, 20
7: char separator, 208: non-combustible, 209: char with high combustibility, 210: char hopper, 211: combustion melting furnace, 212: heated air, 213: slag, 215: exhaust gas, 216: heat exchanger, 217: Bag filter, 21
8: Fly ash, 219: Chimney, 220: Slag cooling water, 22
1: Turbine, 31: Primary air nozzle with flame stabilizer, 32:
Flame stabilizer, 32a: cone, 32b: support, 3
3: Pyrolysis gas ejection direction, 34: Primary air ejection direction, 3
5: Around the mixture of the pyrolysis gas and the primary air, 50: Boundary line between stable combustion and misfire at the nozzle with flame stabilizer, 51: Stable combustion range at the nozzle with flame stabilizer, 52: Flame stabilizer Unstable or misfiring range with nozzle, 53: Stable burning range with no flameholder, 54: Misfire range with no flameholder, 55: Stable combustion and misfiring with nozzle without flameholder Border

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Hironobu Kobayashi 7-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside Power and Electricity Research Laboratory, Hitachi, Ltd. (72) Inventor Minoru Tamura Omika, Hitachi City, Ibaraki Prefecture 7-2-1, Machi-cho, Hitachi, Ltd. Power and Electric Development Laboratory (72) Inventor Toshiaki Ikeuchi 4-6-1, Kanda Surugadai, Chiyoda-ku, Tokyo F-term in Hitachi, Ltd. 3K061 AA24 AB02 AC01 AC19 BA06 CA01 FA01 3K078 AA06 BA03 CA02 CA07 CA21

Claims (4)

[Claims] 1. A pyrolysis gas combustor for burning pyrolysis gas converted from waste, wherein the pyrolysis gas combustor jets a fuel for startup, and a fuel jet for startup. A spout that is coaxially located on the outer periphery of the spout and ejects the pyrolysis gas, and burns the pyrolysis gas or the starting fuel that is positioned around the two spouts.
And a primary air jet port, and a flame holder having a partial conical shape extending radially from the periphery of the pyrolysis gas jet port toward the primary air jet port is provided. Gas combustor. 2. The pyrolysis gas combustor has a secondary air outlet for secondary combustion in a direction orthogonal to a central axis of a flame formed by mixing the pyrolysis gas and the primary air. 2. The pyrolysis gas combustor according to claim 1, wherein the combustor is installed. 3. The pyrolysis gas combustor according to claim 1, wherein a plurality of the primary air jets are formed around the pyrolysis gas jet at equal intervals. . 4. A pyrolysis gas combustor according to claim 1, comprising a pyrolysis furnace for converting waste into pyrolysis gas and mainly non-volatile pyrolysis residues. And a pyrolysis furnace, wherein the pyrolysis furnace is heated by heat generated by burning the pyrolysis gas in the pyrolysis gas combustor.