JP6791811B2 - Gas supply structure for secondary combustion and waste incinerator - Google Patents

Description

The present invention mainly relates to a method for appropriately supplying a gas for secondary combustion used in secondary combustion.

Conventionally, a waste incinerator that performs primary combustion and secondary combustion that burns primary combustion gas including unburned gas generated in primary combustion in a combustion chamber has been known. Patent Documents 1 and 2 disclose techniques for supplying a gas for secondary combustion.

Patent Document 1 discloses a configuration in which the outlet of a secondary air blowing nozzle attached to the peripheral wall of a secondary combustion chamber is flattened and the secondary air blowing nozzle is rotatable. With this configuration, the blown secondary air (secondary combustion gas) becomes flat and easily diffuses, so that the mixture of the secondary air and the unburned gas contained in the combustion gas (primary combustion gas) is enhanced. As a result, unburned gas that remains unoxidized by the secondary air remaining in the combustion gas (secondary combustion gas) discharged from the outlet of the secondary combustion chamber when a sufficient contact reaction with the secondary air is not made. The concentration of CO is lower.

Patent Document 2 discloses a combustion air supply device including an air nozzle provided on the furnace wall so as to project inside the furnace, and a jet forming cylinder arranged on the outer periphery of the protruding end portion inside the furnace. In this combustion air supply device, combustion air (secondary combustion gas) is blown out from the air nozzle into the jet forming cylinder to generate an ejector effect, and the gas in the furnace existing around the jet forming cylinder. (Primary combustion gas) is sucked in, and the combustion air mixed with the gas in the furnace is blown out as a jet from the opening of the jet forming cylinder. With this configuration, it is possible to promote the mixing of the combustion air and the gas in the furnace.

Japanese Unexamined Patent Publication No. 5-149519 Japanese Unexamined Patent Publication No. 2016-90189

In Patent Document 1, since the blow port is flat, the blow port has a major axis direction having a long opening length and a minor axis direction having a short opening length. Here, when the flow direction of the combustion gas and the minor axis direction of the blow port are parallel, the thickness of the secondary air is thin, so that the secondary air is easily bent by the combustion gas, so that the secondary air and the combustion gas And cannot be mixed sufficiently. Further, when the flow direction of the combustion gas and the major axis direction of the blow port are parallel to each other, it becomes difficult for the secondary air and the combustion gas to come into contact with each other, so that the secondary air and the combustion gas cannot be sufficiently mixed.

In Patent Document 2, it is necessary to sufficiently increase the discharge speed of the combustion air in order to generate an appropriate ejector effect on the combustion air blown out from the air nozzle. However, if the discharge rate of the combustion air is increased, the amount of the supplied combustion air may be excessive. As a result, the temperature of the gas in the furnace may drop excessively. Due to the above circumstances, in the configuration of Patent Document 2, the ejector effect exerts the discharge rate of the combustion air blown out from the air nozzle within an appropriate range of the amount of "combustion air" that does not excessively lower the temperature of the gas in the furnace. Since the speed cannot be increased to the extent that the speed is increased, the predetermined ejector effect cannot be sufficiently exerted, and the combustion air and the gas in the furnace cannot be sufficiently mixed.

The present invention has been made in view of the above circumstances, and a main object thereof is to provide a gas supply method for secondary combustion for sufficiently mixing a primary combustion gas and a secondary combustion gas. is there.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem and its effect will be described.

From the viewpoint of the present invention, a gas supply structure for secondary combustion having the following configuration is provided. That is, the gas supply structure for secondary combustion is secondary to the waste incinerator that performs primary combustion and secondary combustion that burns primary combustion gas including unburned gas generated in primary combustion in the combustion chamber. It is provided to supply a gas for secondary combustion, which is a gas containing oxygen used in secondary combustion. The secondary combustion gas supply structure has a closed portion that always forms a hollow space through which the secondary combustion gas does not flow in a cross section cut by a plane perpendicular to the flow direction of the secondary combustion gas, and the hollow space. It is provided with a supply unit that is located on the outside and surrounds the hollow space to form a supply space through which the secondary combustion gas flows. The secondary combustion gas supply structure always supplies the secondary combustion gas in a state where the supply space is formed around the hollow space to the combustion chamber .

As a result, the space volume through which the secondary combustion gas passes is wider than when the same amount of secondary combustion gas is supplied without providing a hollow space, so that the secondary combustion gas and the primary combustion gas are separated. Can be mixed well. Further, since the thickness of the secondary combustion gas can be reduced as compared with the case where the same amount of the secondary combustion gas is supplied without providing the hollow space, the eddy current generated at the contact with the primary combustion gas can be used. The secondary combustion gas and the primary combustion gas can be sufficiently mixed by effectively utilizing stirring and diffusion. Further, since the secondary combustion gas is supplied so as to surround the hollow space, it is less likely to be bent by the primary combustion gas as compared with the case where it is supplied as a flat shape having the same thickness. As described above, the secondary combustion gas and the primary combustion gas can be sufficiently mixed, so that the primary combustion gas can be sufficiently burned.

According to the present invention, it is possible to provide a method for supplying a gas for secondary combustion for sufficiently mixing the primary combustion gas and the gas for secondary combustion.

The schematic block diagram of the incinerator of one Embodiment of this invention. Functional block diagram of the incinerator. The cross-sectional view which shows the gas supply structure for secondary combustion. The figure which shows the state which the secondary combustion gas and the primary combustion gas come into contact with each other in a combustion chamber.

First, the incinerator (waste incinerator) 10 of the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of an incinerator 10 according to an embodiment of the present invention. In the following description, when the terms "upstream" and "downstream" are used, they mean upstream and downstream in the direction in which waste, combustion gas, combustion gas, exhaust gas, etc. flow.

The present invention is applicable to incinerators having various configurations. Therefore, for example, the incinerator 10 may be a grate type incinerator, a fluidized bed type incinerator, or a fixed bed type incinerator.

The incinerator 10 includes a combustion chamber 20 and a gas supply device 50. First, the combustion chamber 20 will be described. A primary combustion zone 11 and a secondary combustion zone 12 are formed in the combustion chamber 20. Hereinafter, the primary combustion performed in the primary combustion zone 11 and the secondary combustion performed in the secondary combustion zone 12 will be described.

<Primary combustion and secondary combustion> The primary combustion zone 11 is a space for primary combustion. The primary combustion is to react the input waste with a gas for primary combustion and burn it (drying, flame combustion, oki combustion). The primary combustion gas is a gas containing oxygen supplied for the primary combustion. The primary combustion gas includes primary air, circulating exhaust gas, and a mixed gas thereof. The primary air is air taken in from the outside and is not used for combustion or the like (that is, excluding circulating exhaust gas). Therefore, the primary air also includes a gas obtained by heating the air taken in from the outside. In addition, the primary combustion generates a primary combustion gas (flue gas after primary combustion) containing an unburned gas such as CO.

The primary combustion will be further described. For example, assume that the incinerator 10 is a grate type incinerator and is composed of a drying stage, a combustion stage, and a post-combustion stage. In this case, in the drying stage, the waste is dried and pyrolysis gas is generated. In the combustion stage, the waste dried in the drying stage mainly causes flame combustion, and ash, solid unburned matter that could not be burned, and primary combustion gas including unburned gas are mainly generated. Further, in the post-combustion stage, solid unburned material that could not be completely burned in the combustion stage is burned to the brim, and ash and primary combustion gas including unburned gas are mainly generated. Here, in the drying stage, the combustion stage, and the post-combustion stage, the waste is dried, flame-burned, and burned to generate primary combustion gas, so that primary combustion is performed. As described above, since the present invention can be applied to incinerators having various configurations, the incinerator 10 may have a configuration in which at least one of a drying stage and a post-combustion stage does not exist, or each configuration may be present. The structure may be such that the steps are not clearly divided.

The secondary combustion zone 12 is a space for secondary combustion. The secondary combustion is to react the unburned gas contained in the primary combustion gas with the secondary combustion gas and burn it. The gas for secondary combustion is a gas containing oxygen supplied for secondary combustion. The secondary combustion gas includes secondary air, circulating exhaust gas, and a mixed gas thereof. The secondary air is air taken in from the outside and is not used for combustion or the like (that is, excluding circulating exhaust gas). Therefore, the secondary air also includes a gas obtained by heating the air taken in from the outside. Combustion completeness can be promoted by performing secondary combustion.

Further, in FIG. 1, the secondary combustion zone 12 is formed directly above the primary combustion zone 11, but if it is a space to which the primary combustion gas is supplied, secondary combustion other than directly above the primary combustion zone 11 Zone 12 may be formed. Further, for example, the incinerator may be configured to burn the unburned gas contained in the primary combustion gas in a plurality of times by supplying the secondary combustion gas on the upstream side and the downstream side. Even in this case, considering the above definition of secondary combustion, all of the multiple combustions correspond to secondary combustion.

<Supply of primary combustion gas and secondary combustion gas> The gas supply device 50 is a device that supplies gas (primary combustion gas, secondary combustion gas) into the combustion chamber 20. The gas supply device 50 of the present embodiment includes a primary air supply unit 51, a secondary air supply unit 52, and an exhaust gas supply unit 53. Each supply unit is composed of a blower for attracting or sending out gas.

The primary air supply unit 51 supplies the primary air to the combustion chamber 20 via the primary supply path 71. A first damper 81 is provided in the primary supply path 71, and the amount of primary air supplied to the combustion chamber 20 can be adjusted. As shown in FIG. 2, the first damper 81 is controlled by the control device 90.

Further, a heater may be provided in the primary supply path 71 so that the temperature of the primary air supplied to the combustion chamber 20 can be adjusted. Further, as described above, since the primary combustion gas also includes the circulating exhaust gas and the mixed gas, they may be supplied to the combustion chamber 20. Further, in the present embodiment, the gas for primary combustion is supplied to the primary combustion zone 11 from below, but may be supplied from the side of the primary combustion zone 11 or the like. Further, the gas for primary combustion may be supplied to the upstream side of the primary combustion zone 11 if it is used for primary combustion.

The secondary air supply unit 52 supplies secondary air (secondary combustion gas) to the combustion chamber 20 via the upstream secondary supply path 72 and / or the downstream secondary supply path 73. The exhaust gas supply unit 53 supplies the circulating exhaust gas (secondary combustion gas) to the combustion chamber 20 via the upstream secondary supply path 72 and / or the downstream secondary supply path 73.

More specifically, a second damper 82 is provided in the path connecting the secondary air supply unit 52 and the upstream secondary supply path 72, and the upstream side two is provided according to the control of the control device 90. The amount of secondary air supplied to the secondary supply path 72 can be adjusted. Further, a third damper 83 is provided in the path connecting the exhaust gas supply unit 53 and the upstream secondary supply path 72, and supplies the exhaust gas to the upstream secondary supply path 72 according to the control of the control device 90. The amount of circulating exhaust gas supplied can be adjusted. With this configuration, it is possible to control the supply amount of the secondary air supplied from the upstream secondary supply path 72, the supply amount of the circulating exhaust gas, and their ratios.

Similarly, a fourth damper 84 is provided in the path connecting the secondary air supply section 52 and the downstream secondary supply path 73, and connects the exhaust gas supply section 53 and the downstream secondary supply path 73. A fifth damper 85 is provided on the path to be used. With this configuration, the supply amount of the secondary air supplied from the downstream secondary supply path 73, the supply amount of the circulating exhaust gas, and their ratio can be controlled according to the control of the control device 90. Further, the adjusting unit 80 is composed of the second damper 82 to the fifth damper 85. Therefore, the adjusting unit 80 can adjust the type (secondary air, circulating exhaust gas, or mixed gas) and the amount of the secondary combustion gas supplied through the plurality of paths.

In the present embodiment, the secondary combustion gas is supplied to the secondary combustion zone 12. However, if the gas for secondary combustion is used for secondary combustion, it may be supplied to the upstream side (for example, the primary combustion zone 11) of the secondary combustion zone 12.

In the present embodiment, the secondary combustion gas is supplied separately to the upstream side and the downstream side, but the secondary combustion gas may be supplied from only one of them. Further, in the present embodiment, the secondary combustion gas is supplied from each of the upstream side and the downstream side, but the secondary combustion gas may be supplied from a plurality of locations, respectively. Further, in the present embodiment, the mixed gas of the secondary air and the circulating exhaust gas can be supplied on both the upstream side and the downstream side, respectively, but only the secondary air or only the secondary air is supplied to at least one of the upstream side and the downstream side. The configuration may be such that only the circulating exhaust gas is supplied.

<Electrical configuration and automatic combustion control> As shown in FIGS. 1 and 2, the incinerator 10 is provided with a plurality of sensors for grasping the combustion state and the like. Specifically, the incinerator 10 is provided with a combustion chamber gas temperature sensor (combustion sensor) 91, a CO gas concentration sensor (combustion sensor) 92, and a NOx gas concentration sensor (combustion sensor) 93. ..

The combustion chamber gas temperature sensor 91 is arranged in the combustion chamber 20, detects the combustion chamber gas temperature which is the gas temperature in the combustion chamber 20, and outputs the gas temperature to the control device 90. A plurality of combustion chamber gas temperature sensors 91 may be provided at different positions in the gas flow direction. In this case, since the combustion chamber gas temperature on the upstream side and the combustion chamber gas temperature on the downstream side can be obtained individually, the combustion state can be estimated more accurately. Further, a plurality of combustion chamber gas temperature sensors 91 may be provided at the same position in the gas flow direction (for example, one side wall and the other side wall at the same height). In this case, since the temperature at the same position in the gas flow direction can be measured more accurately, the combustion state can be estimated more accurately.

The CO gas concentration sensor 92 is located downstream of the combustion chamber 20 and further downstream than the dust collector shown in the figure, and detects the CO gas concentration contained in the exhaust gas (CO gas concentration discharged from the incinerator). Output to the control device 90. From the CO gas concentration discharged from the incinerator detected by the CO gas concentration sensor 92, although it was reacted with the secondary combustion gas by the secondary combustion in the combustion chamber 20, a sufficient contact reaction with the secondary combustion gas was not made. As a result, the concentration of CO (how much unburned gas is generated), which is the unburned gas remaining in the combustion gas (secondary combustion gas) discharged from the outlet of the combustion chamber 20, is grasped. be able to.

The NOx gas concentration sensor 93 is arranged further downstream than the dust collector like the CO gas concentration sensor 92, and detects the NOx gas concentration (NOx gas concentration discharged from the incinerator) contained in the exhaust gas to control the control device 90. Output to. From the NOx gas concentration discharged from the incinerator detected by the NOx gas concentration sensor 93, the difference between the concentration of NOx gas discharged from the combustion chamber 20 and the target NOx gas concentration can be grasped.

The control device 90 is composed of a CPU, RAM, ROM, etc., performs various calculations, and controls the entire incinerator 10. Hereinafter, among the controls performed by the control device 90, automatic combustion control will be described.

The automatic combustion control is to comprehensively judge the combustion data (internal detection data) of the incinerator 10 obtained from the above-mentioned plurality of sensors and to maintain the combustion state of the combustion chamber 20 stably for a long period of time. Is the control of. Specifically, as shown in FIG. 2, the control device 90 adjusts the supply amount of the gas supplied to each part by adjusting the first damper 81 to the fifth damper 85. Further, the control items other than the gas supply amount may be adjusted.

By making such adjustments, the combustion state of the combustion chamber 20 can be stably maintained for a long period of time. Further, the combustion generated in the incinerator 10 greatly differs depending on the shape and structure of the incinerator 10 and the waste to be charged. In addition, the target value for automatic combustion control also differs greatly depending on the durability of the incinerator 10, the required processing amount, the laws and regulations regarding exhaust gas, and the like. The control device 90 comprehensively determines them and performs automatic combustion control.

For example, when the combustion chamber gas temperature detected by the combustion chamber gas temperature sensor 91 is low, there is a high possibility that the combustion in the combustion chamber 20 is insufficient, so that it is included in the primary combustion gas and / or the secondary combustion gas. Control may be performed to increase the amount of oxygen supplied (increase the supply amount or increase the air supply ratio). Further, for example, when the CO gas concentration discharged from the incinerator detected by the CO gas concentration sensor 92 is high, there is a high possibility that the secondary combustion is insufficient, so that the amount of oxygen contained in the secondary combustion gas is increased (supply amount). (Or increase the air supply ratio) control may be performed. Further, for example, when the NOx gas concentration discharged from the incinerator detected by the NOx gas concentration sensor 93 is high, there is a possibility that control is performed to increase the supply amount or the supply ratio of the circulating exhaust gas in order to reduce the concentration. The control shown above may not be performed depending on the values of other in-core detection data.

<Specific Supply Structure of Secondary Combustion Gas> Next, the secondary combustion gas supply structure 30 which is a structure for supplying the secondary combustion gas to the combustion chamber 20 will be described with reference to FIG. .. FIG. 3A is a cross-sectional view showing a gas supply structure 30 for secondary combustion. FIG. 3B is a view of the supply pipe 32 and the closed shaft portion 33 in the flow direction of the secondary combustion gas (A cross-sectional view taken along the line AA of FIG. 3A).

In the present embodiment, the secondary combustion gas is supplied from two locations, the upstream side secondary supply path 72 and the downstream side secondary supply path 73, both of which have the same structure as the secondary combustion gas supply structure 30. Is adopted. The gas supply structure 30 for secondary combustion includes a relay pipe 31, a supply pipe (supply unit) 32, a closed shaft portion (closed portion) 33, and a fixed portion 34.

The relay pipe 31 is a tubular (cylindrical) member, and is a portion through which the secondary combustion gas supplied by the secondary air supply unit 52 and / or the exhaust gas supply unit 53 flows. The relay pipe 31 is connected to the outer peripheral surface of the supply pipe 32. Although the relay tube 31 is cylindrical, it may have a different shape. Further, the relay pipe 31 may be connected to a surface other than the outer peripheral surface of the supply pipe 32.

The supply pipe 32 is located on the downstream side of the relay pipe 31 in the flow direction of the secondary combustion gas. The supply pipe 32 is a tubular (cylindrical) member, and the secondary combustion gas introduced through the relay pipe 31 flows through the supply pipe 32. Further, the downstream end of the supply pipe 32 is connected to the secondary combustion zone 12 of the combustion chamber 20 by being attached to a hole formed in the wall portion 20a of the combustion chamber 20. With this configuration, the secondary combustion gas can be supplied to the combustion chamber 20. Further, although the supply pipe 32 is cylindrical, it may have a different shape. Further, although the supply pipe 32 is attached vertically to the wall portion 20a, it may be attached at an angle.

The closed shaft portion 33 is a columnar (solid) member arranged inside the supply pipe 32. The downstream end of the closed shaft portion 33 passes through a hole formed in the wall portion 20a like the supply pipe 32. Further, although the closed shaft portion 33 is a cylinder, it may have a different shape. Further, although the closed shaft portion 33 is cylindrical, it may be cylindrical as long as it is configured so that the secondary combustion gas does not pass through the inside. Further, the structure may be cylindrical and may be filled with a refractory or the like. Further, a structure capable of heating the closed shaft portion 33 with an external heat source for the purpose of contact heating the secondary combustion gas while passing through the secondary combustion gas supply structure 30 (particularly in the supply pipe 32). May be. The end on the opposite side (upstream side) of the closed shaft portion 33 is fixed to the fixing portion 34. Further, the downstream end of the closed shaft portion 33 is positioned on the same surface as the inner surface of the wall portion 20a of the combustion chamber 20, but the flow shape of the secondary combustion gas inside the secondary combustion zone 12 is appropriate. The downstream end of the closed shaft portion 33 may be recessed toward the outside of the furnace or protruded toward the inside of the furnace from the same surface position as the inner surface of the wall portion 20a of the combustion chamber 20. Good.

The supply pipe 32 and the fixing portion 34 have a flange structure and are connected to each other. With this configuration, the closed shaft portion 33 can be fixed in a state of being floated from the supply pipe 32 (a state in which the closed shaft portion 33 does not come into contact with the supply pipe 32). Further, the closing shaft portion 33 can be removed from the incinerator 10 only by removing the fixing portion 34 from the supply pipe 32 (that is, without removing the supply pipe 32 from the wall portion 20a). Therefore, even when the supply pipe 32 is irremovably fixed to the wall portion 20a, the closed shaft portion 33 can be replaced.

Further, the secondary combustion gas supply structure 30 can supply the secondary combustion gas so as to be sufficiently mixed with the primary combustion gas by the above configuration. The details will be described below. The supply pipe 32 is arranged so as to surround the closed shaft portion 33. Further, the gas for secondary combustion does not flow in the portion where the closed shaft portion 33 exists. Therefore, as shown in FIG. 4, the secondary combustion gas is located outside the hollow space and surrounds the hollow space in which the secondary combustion gas does not flow due to the closed shaft portion 33. , A supply space through which the secondary combustion gas flows is formed by the supply pipe 32, and the gas is supplied to the combustion chamber 20.

Here, when the secondary combustion gas comes into contact with the primary combustion gas, it is a mixture of foreign gases, so that the primary combustion gas flows in a minute vortex around the secondary combustion gas charged into the primary combustion gas. Is mixed and stirred while forming. Here, since the secondary combustion gas is supplied in a hollow shape, the thickness of the secondary combustion gas can be reduced, so that agitation and diffusion due to the vortex generated in contact with the primary combustion gas can be effectively performed. It can be utilized to sufficiently mix the secondary combustion gas and the primary combustion gas. Furthermore, compared to the case where the same amount of secondary combustion gas is supplied in a solid state instead of hollow, the space volume through which the secondary combustion gas passes is expanded, so that the secondary combustion gas and the primary combustion gas are separated. Can be mixed well. Further, since the secondary combustion gas is supplied so as to surround the hollow space, it is less likely to be bent by the primary combustion gas as compared with the case where it is supplied as a flat shape having the same thickness. Therefore, since it easily spreads in the combustion chamber 20, the secondary combustion gas and the primary combustion gas can be sufficiently mixed in this respect as well.

Therefore, in the present embodiment, the secondary combustion is sufficiently performed, so that the combustion completeness can be promoted. In particular, in the present embodiment, since the above-mentioned automatic combustion control is performed, the combustion completeness can be further promoted.

As described above, the method for supplying the gas for secondary combustion of the present embodiment is performed on the incinerator 10 in which the primary combustion and the secondary combustion are performed in the combustion chamber 20. The method for supplying a gas for secondary combustion includes a supply step of supplying a gas for secondary combustion, which is a gas containing oxygen used in secondary combustion. In the supply process, the secondary combustion gas is supplied to the combustion chamber 20 so that a hollow space and a supply space are formed. When viewed in the flow direction of the secondary combustion gas, the hollow space is a region where the secondary combustion gas does not flow, and the supply space is located outside the hollow space and surrounds the hollow space. This is the area where the secondary combustion gas flows.

As a result, as described above, the primary combustion gas and the secondary combustion gas can be sufficiently mixed, so that the completion of combustion can be promoted.

Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

In the above embodiment, the two secondary combustion gas supply structures 30 included in the incinerator 10 are both configured to supply a hollow secondary combustion gas. Instead of this, one of the secondary combustion gas supply structures 30 may be configured to supply a solid secondary combustion gas.

In the above embodiment, the combustion chamber gas temperature sensor 91, the CO gas concentration sensor 92, and the NOx gas concentration sensor 93 have been described as combustion sensors, but automatic combustion control is performed using any one of the combustion sensors. Alternatively, automatic combustion control may be performed by adding a combustion sensor other than the above.

10 Incinerator (waste incinerator)
20 Combustion chamber 30 Gas supply structure for secondary combustion 31 Relay pipe 32 Supply pipe (supply part)
33 Closed shaft (closed part)
34 Fixed part 72 Upstream side secondary supply path 73 Downstream side secondary supply path 80 Adjustment part 90 Control device 91 Combustion chamber gas temperature sensor (combustion sensor)
92 CO gas concentration sensor (combustion sensor)
93 NOx gas concentration sensor (combustion sensor)

Claims (3)

For a waste incinerator that performs primary combustion and secondary combustion that burns primary combustion gas including unburned gas generated in primary combustion in the combustion chamber, it is a gas containing oxygen used in secondary combustion. In a secondary combustion gas supply structure provided to supply a certain secondary combustion gas,
The secondary combustion gas supply structure has a cross section cut by a plane perpendicular to the flow direction of the secondary combustion gas.
A closed part to always form a hollow space where the secondary combustion gas does not flow,
A supply unit located outside the hollow space and surrounding the hollow space to form a supply space through which the secondary combustion gas flows.
With
A secondary combustion gas supply structure, characterized in that a secondary combustion gas in a state in which the supply space is formed around the hollow space is constantly supplied to the combustion chamber . A waste incinerator that performs primary combustion and secondary combustion that burns primary combustion gas including unburned gas generated in primary combustion in a combustion chamber.
It is equipped with a plurality of secondary combustion gas supply structures that supply a secondary combustion gas, which is a gas containing oxygen used in secondary combustion.
A waste incinerator, characterized in that at least one of the secondary combustion gas supply structures is the secondary combustion gas supply structure according to claim 1 . The waste incinerator according to claim 2 .
The waste incinerator is
A combustion sensor that detects data related to combustion in the combustion chamber,
An adjusting unit having a mechanism capable of adjusting at least one of the type and the supply amount of the secondary combustion gas supplied by the plurality of the secondary combustion gas supply structures.
Based on the combustion data detected by the combustion sensor, at least one of the type and the supply amount of the secondary combustion gas supplied from the supply space of the plurality of secondary combustion gas supply structures is adjusted. A control device that controls and
A waste incinerator characterized by being equipped with.

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