JP7385778B2 - Incinerator structure - Google Patents

Description

The present disclosure relates to incinerator structures for waste, etc.

A rotary stoker type incinerator (stoker furnace), which is a type of waste incinerator, is equipped with a furnace body consisting of a grate (stoker, rostre) with a large number of gas supply holes. The furnace body is formed into a cylindrical shape and rotates during operation. The waste input into the furnace body moves downstream while being agitated by the rotation of the furnace body while being supplied with primary gas through the gas supply hole. During this stirring and movement, the temperature of the waste increases, and the waste is dried, thermally decomposed, and then combusted (see Patent Document 1).

A kiln-type incinerator (rotary kiln, rotary incinerator) is also known as an incinerator equipped with a cylindrical furnace body (see Patent Document 2). However, the inner surface of the furnace body in a kiln-type incinerator is covered with a heat-resistant material such as brick, and does not have the above-mentioned gas supply holes.

Japanese Patent Application Publication No. 2006-57963 Japanese Patent Application Publication No. 2000-329471

The above-mentioned cylindrical furnace body is placed horizontally, and its posture is maintained by supporting the outer peripheral surface of the furnace body. An annular member (so-called tire) is provided on the outer periphery of the furnace body, and the annular member and the furnace body are connected by a connecting member such as a spoke or a leaf spring.

In connecting the annular member and the furnace body, the connecting member is connected to a terminal portion fixed to the outer peripheral surface of the furnace body. The terminal portion is formed as a separate structure from the furnace body, and its rigidity is higher than that of the furnace body. Therefore, stress concentration is more likely to occur at the connection portion between the furnace body and the terminal portion than at the surrounding area. Such stress concentration becomes a factor that prevents the operation period of the furnace body from becoming longer.

The present disclosure has been made in view of the above situation. That is, an object of the present disclosure is to provide an incinerator structure that can alleviate stress concentration at the connection portion between the furnace body and the terminal portion.

A first aspect of the present disclosure is an incinerator structure, which includes a cylindrical furnace body, and an annular support that extends in the circumferential direction of the furnace body and is fixed to the outer peripheral surface of the furnace body. and a plurality of terminal parts that engage with a structure that transmits force between the furnace body, are provided along the circumferential direction of the furnace body, and are fixed to the support part. shall be.

A second aspect of the present disclosure is an incinerator structure that engages a cylindrical furnace body and a structure that transmits force between the furnace body and extends along the outer periphery of the furnace body. a plurality of terminal portions arranged in a row and fixed to the outer peripheral surface of the furnace main body; and a plurality of terminal portions fixed to the outer peripheral surface of the furnace main body and connecting mutually adjacent terminal portions among the plurality of terminal portions. and a connecting portion, and the plurality of terminal portions and the plurality of connecting portions constitute an annular support portion extending in the circumferential direction of the furnace main body.

In the incinerator structure according to the first aspect or the second aspect, the furnace body may be made of metal. A plurality of the support parts may be provided for each group of the plurality of terminal parts.

According to the present disclosure, it is possible to provide an incinerator structure that can alleviate stress concentration at the connection portion between the furnace body and the support portion.

1 is a schematic configuration diagram of an incinerator according to an embodiment of the present disclosure. 2 is a sectional view taken along line II-II shown in FIG. 1. FIG. 3 is a partially enlarged view of the furnace body shown in FIG. 2. FIG. FIG. 1 is a cross-sectional view of an incinerator structure according to a first embodiment of the present disclosure. 5 is a partially enlarged view of the cross-sectional view shown in FIG. 4. FIG. (a) is a VIA-VIA sectional view in FIG. 5, and (b) is a VIB-VIB sectional view in FIG. It is a figure which shows the thrust receiving part and connection part as a terminal part based on 2nd Embodiment. FIG. 2 is an enlarged cross-sectional view of an incinerator structure that employs spokes. It is an enlarged cross-sectional view showing a modification of the incinerator structure that employs spokes.

Embodiments of the present disclosure will be described below with reference to the drawings. Note that common parts in each figure are given the same reference numerals, and redundant explanations will be omitted. The incinerator structure according to this embodiment includes a cylindrical furnace body, and is applicable to a rotary stoker type incinerator and a kiln type incinerator. However, the incinerator structure according to this embodiment is also applicable to other incinerators having a similar configuration.

For convenience, an example will be described in which the incinerator structure is applied to a rotary stoker type incinerator (hereinafter referred to as an incinerator). That is, the furnace body of the incinerator structure is formed in a cylindrical shape and rotates around its central axis. In the following description, the axial direction, circumferential direction, and tangential direction refer to the axial direction (longitudinal direction), circumferential direction, and tangential direction of the furnace body, respectively.

<First embodiment>
A first embodiment of the present disclosure will be described. First, the configuration of the incinerator 10 will be explained. FIG. 1 is a schematic configuration diagram of an incinerator 10. FIG. 2 is a sectional view taken along line II-II shown in FIG. FIG. 3 is a partially enlarged view of the furnace body 11 shown in FIG. 2.

As shown in FIGS. 1 to 3, the incinerator 10 includes a furnace body 11 formed in a cylindrical shape (see FIG. 2). The furnace body 11 has an inlet 11a for the waste W at the upstream end in the axial direction (the left end in FIG. 1). Similarly, the furnace body 11 has an outlet 11b for the waste W at the downstream end (the left end in FIG. 1) of the furnace body 11. The furnace body 11 is installed in a slightly inclined state with respect to a horizontal plane (lateral direction in FIG. 1) so that the outlet 11b is lower than the inlet 11a. The furnace body 11 is made of metal, and its material is, for example, metal such as carbon steel.

The furnace body 11 is housed in a cover casing 12. The furnace body 11 includes a plurality of water pipes 13 , a plurality of fins 14 , an inlet header pipe 16 , and an outlet header pipe 17 . The water pipes 13 are metal pipes extending in the axial direction, and are arranged in the circumferential direction at predetermined intervals. A seal plate 19 is attached to each water pipe 13. The seal plate 19 extends over substantially the entire length of the water pipe 13 and is expanded radially outward.

The fin 14 is a metal band-shaped member extending in the axial direction. The fin 14 is located between two water pipes 13, 13 that are adjacent to each other. That is, the water pipes 13 and the fins 14 extend in the axial direction and are arranged alternately in the circumferential direction at predetermined intervals. A plurality of pores 15 are formed in the fin 14. The fin 14 connects two water pipes 13, 13 located on both sides thereof. Due to this connection, the fins 14 with the air holes 15 and the water pipes 13 constitute a so-called grate. Further, the water tube 13 and the fins 14 constitute an outer circumferential surface 11c of the furnace body 11, and the furnace body 11 has a cylindrical shape as a whole.

The inlet header pipe 16 is attached to the upstream end (the left end in FIG. 1) of the furnace body 11. On the other hand, the outlet header pipe 17 is attached to the downstream end of the furnace body 11 (the right end in FIG. 1). The inlet header pipe 16 and the outlet header pipe 17 communicate with the water pipe 13 between them.

Further, the outlet header pipe 17 is connected to a rotary joint 18 provided on the downstream side (right side in FIG. 1). The rotary joint 18 is a supply path and a discharge path for water flowing through the water pipe 13. That is, water returns to the rotary joint 18 from the rotary joint 18 via the outlet header pipe 17, the water pipe 13, and the inlet header pipe 16. By using high-temperature boiler water as the circulating water, the water pipes 13 and fins 14 can be maintained at a temperature at which low-temperature corrosion and high-temperature corrosion are less likely to occur.

As shown in FIG. 1, an annular member (tire) 20 is provided on the outer periphery of the furnace body 11. The annular member 20 is located on the inlet 11a side and the outlet 11b side of the furnace body 11. The inner diameter of the annular member 20 is larger than the outer diameter of the furnace body 11. The annular member 20 and the furnace body 11 are slidably connected in the radial direction by a plate spring 21 as a connecting member (see FIG. 4).

The annular member 20 is placed on a roller 22 . The roller 22 is rotated by a drive device 23, and this rotation causes the furnace body 11 to rotate. Note that a drive mechanism such as a pin gear may be employed as the drive device 23. In this case, the annular member 20 is driven directly by the drive 23.

A hopper 24 is provided on the inlet 11a side of the furnace body 11. The waste W put into the hopper 24 is supplied to the furnace body 11 by a dust feeder (not shown).

A wind box (duct) 25 is provided on the lower side of the furnace body 11 and communicates with the lower end of the cover casing 12 . The primary gas (for example, air) supplied to the wind box 25 is supplied into the interior of the furnace body 11 from the lower part of the furnace body 11 through the pores 15 .

As shown in FIGS. 1 and 2, the wind box 25 is divided into an axial direction and a circumferential direction. That is, a plurality of primary gas supply paths communicating with the furnace body 11 are provided in the axial direction and the circumferential direction of the furnace body 11. On the other hand, the amount of primary gas supplied to each supply path can be adjusted using a flow rate adjustment device (not shown) such as a damper. For example, depending on the composition, amount, and distribution of waste W remaining in the furnace body 11, the supply destination and supply amount of the primary gas can be optimized.

A sealing device 26 is installed at each outlet of the divided wind box 25. When the furnace body 11 rotates, the seal plates 19 attached to each water pipe 13 come into contact with the seal device 26 one after another. Through this contact, each supply path is appropriately partitioned, and the primary gas can be appropriately supplied to a desired location.

In the above-described incinerator 10, waste W is supplied into the furnace body 11 while the furnace body 11 is being rotated at low speed by the drive device 23. The waste W in the furnace body 11 is agitated as the furnace body 11 rotates, and gradually moves downstream due to the inclination of the furnace body 11.

While the waste W is moving within the furnace body 11, primary gas is supplied from the wind box 25 to the furnace body 11. Note that the supply amount of the primary gas is set to an amount that maintains slow combustion of the waste W. The inside of the incinerator 10 has a high temperature due to the slow combustion of previously input waste. Under such conditions, the newly introduced waste W undergoes the processes of drying, thermal decomposition, and combustion in order from the upstream side to the downstream side of the furnace body 11.

Unburned gas generated due to slow combustion is combusted in the downstream secondary combustion chamber 27 by supplying a secondary gas (for example, air). Further, unburned components in the ashes of the waste W discharged from the furnace body 11 are burned in the after-combustion stoker 28 . So-called after-combustion takes place.

Next, the incinerator structure 30A of this embodiment will be explained. FIG. 4 is a cross-sectional view of the incinerator structure 30A. FIG. 5 is a partially enlarged view of the cross-sectional view shown in FIG. 4. 6(a) is a VIA-VIA sectional view in FIG. 5, and FIG. 6(b) is a VIB-VIB sectional view in FIG. As shown in these figures, the incinerator structure 30A includes the above-mentioned furnace body 11, a support section 31A, and a terminal section 32A. The terminal portion 32A is, for example, a leaf spring receiving portion 34, which will be described later.

As shown in FIG. 4, the support portion 31A is formed in an annular shape extending in the circumferential direction, and is fixed to the outer peripheral surface 11c of the furnace body 11. For example, the support portion 31A is fixed to the outer peripheral surface 11c of the furnace body 11 by welding. The thickness of the support portion 31A along the axial direction and the height of the support portion 31A along the radial direction are appropriately set according to the material of the furnace body 11, the usage environment, the size of the terminal portion 32A, etc. be done.

A plurality of supporting parts 31A may be provided depending on the size of the terminal part 32A. In other words, a plurality of supporting parts 31A may be provided for a group of a plurality of terminal parts 32A. In this case, the support parts 31A are arranged at predetermined intervals in the axial direction and support each terminal part 32A. By providing a plurality of supporting portions 31A, it is possible to prevent the supporting portions 31A from becoming excessively thick and interfering with the thermal expansion of the furnace body 11.

The terminal portion 32A is fixed to the support portion 31A. The terminal portion 32A engages with a structure 33 that transmits force to and from the furnace body 11, and is provided in plural along the circumferential direction of the furnace body 11. Further, the terminal portion 32A has a shape depending on the form of engagement with the structure 33 and the shape and dimensions of the structure 33.

Hereinafter, a first example and a second example of the terminal portion 32A and the structure 33 will be described.

(1st example)
A first example of the structure 33 is a leaf spring 21 that connects the furnace body 11 and the annular member 20. Further, a first example of the terminal portion 32A is a leaf spring receiving portion 34 that engages with the leaf spring 21.

As shown in FIG. 5, a plurality of leaf springs 21 are provided in the circumferential direction at predetermined angular intervals between the outer peripheral surface 11c of the furnace body 11 and the annular member 20. The leaf spring 21 has a spring body 35 that extends in the tangential direction of the furnace body 11 and is deflectable in the radial direction of the furnace body 11 . Both ends of the spring body 35 are supported by mounting portions (brackets) 37 provided on the inner peripheral surface 20a of the annular member 20. Further, the spring body 35 has a convex portion 36 having a rectangular cross section at the center thereof. The convex portion 36 protrudes radially inward from the spring body 35 by a predetermined length.

On the other hand, the leaf spring receiving part 34 is fixed to the support part 31A. For example, the leaf spring receiving portion 34 is fixed to the outer peripheral surface 11c of the support portion 31A. Further, the leaf spring receiving portion 34 is provided at a position facing the leaf spring 21 in the radial direction in the support portion 31A. Specifically, the engagement hole 34a of the leaf spring receiving portion 34 opens in the radial direction so as to face the convex portion 36 of the leaf spring 21.

As shown in FIGS. 5 and 6(a), the leaf spring receiving part 34 includes a plate-shaped main body 42 that extends in the circumferential direction and is fixed to the support part 31A, and an engagement hole 34a formed in the main body 42. has. The engagement hole 34a has a cross-sectional shape (for example, a rectangle) that corresponds to the outer shape of the convex portion 36.

The length (width) of the engagement hole 34a in the tangential direction of the furnace body 11 is approximately equal to the length (width) of the convex portion 36 of the leaf spring 21 in this tangential direction. On the other hand, the length (depth) of the engagement hole 34a in the axial direction is smaller than the length (depth) of the convex portion 36 in the axial direction.

Further, at least the tip of the convex portion 36 of the leaf spring 21 is located inside the engagement hole 34a of the leaf spring receiving portion 34. Therefore, due to the width relationship described above, while the convex portion 36 slides in the radial direction on the inner surface of the engagement hole 34a, movement in the circumferential direction with respect to the engagement hole 34a is restricted. That is, due to the engagement between the convex portion 36 and the engagement hole 34a, the leaf spring 21 and the leaf spring receiving portion 34 are allowed to move relative to each other in the radial direction, and their relative movement in the circumferential direction is restricted. be done.

In this way, a plurality of leaf springs 21 are provided in the circumferential direction so as to surround the outer periphery of the furnace main body 11, and while allowing thermal expansion in the radial direction in the furnace main body 11, the leaf springs 21 are connected to the furnace main body 11 via the leaf spring receiving portion 34. elastically supported from the radial direction.

As described above, the leaf spring 21 and the leaf spring receiving portion 34 are restricted from moving in the circumferential direction of each other. Therefore, when the annular member 20 attempts to rotate in the circumferential direction, the furnace body 11 also rotates accordingly. The rotational force of the annular member 20 is transmitted from the leaf spring 21 to the leaf spring receiving part 34 through the mutual abutting portions of the convex part 36 and the engagement hole 34a, and is further transmitted to the furnace body 11 through the support part 31A. is transmitted to. Due to the transmission of this force, stress is generated on the outer circumferential surface 11c of the furnace body 11. Further, since the plate spring 21 located at the lower part of the furnace body 11 supports the furnace body 11, stress due to these reaction forces is also generated on the outer circumferential surface 11c of the furnace body 11.

Any of the above-mentioned forces are transmitted from the leaf spring 21 to the outer circumferential surface 11c of the furnace body 11 via the leaf spring receiving portion 34. The transmission path of this force is localized at the location where the leaf spring 21 contacts. On the other hand, the leaf spring receiving part 34 as the terminal part 32A is a member formed separately from the furnace main body 11, and its rigidity is higher than that of the furnace main body 11. Therefore, when rotational force or reaction force is transmitted between the annular member 20 and the furnace body 11, stress concentration tends to occur near the leaf spring 21 on the outer peripheral surface 11c of the furnace body 11. Such stress concentration becomes a factor that prevents the operation period of the furnace body 11 from becoming longer.

However, in this example, a support portion 31A is interposed between the leaf spring receiving portion 34 and the outer circumferential surface 11c of the furnace body 11. The support portion 31A is formed in an annular shape extending in the circumferential direction and has a continuous integral structure, so that the force transmitted between the leaf spring receiving portion 34 and the furnace main body 11 is dispersed. Therefore, stress concentration near the leaf spring receiving portion 34 is alleviated. Therefore, progress of deterioration such as metal fatigue on the outer circumferential surface 11c of the furnace body 11, that is, the water pipes 13 and the fins 14, is suppressed, and the operating period of the furnace body 11 can be extended.

(Second example)
A second example of the structure 33 is the above-mentioned attachment portion 37 provided on the annular member 20. Further, a second example of the terminal portion 32A is a thrust receiving portion 38A that engages with this attachment portion 37.

As shown in FIGS. 5 and 6(a), the attachment portions 37 protrude radially inward from the inner peripheral surface 20a of the annular member 20 and are arranged in the circumferential direction at predetermined angular intervals. Further, as shown in FIG. 6, the attachment portion 37 has a first plane 37a facing the inlet 11a side of the furnace body 11 and a second plane 37b facing the outlet 11b side of the furnace body 11.

The ends of the two leaf springs 21 are connected (supported) to the attachment portion 37 by a fastening member such as a bolt. Specifically, one end of the two leaf springs 21 is connected to the first plane 37a side, and the other end of the two leaf springs 21 is connected to the second plane 37b side.

On the other hand, the thrust receiving part 38A is fixed to the support part 31A. For example, the thrust receiving portion 38A is fixed to the outer circumferential surface 11c of the supporting portion 31A. Further, the thrust receiving portion 38A is provided at a position facing the mounting portion 37 in the radial direction in the support portion 31A.

As shown in FIG. 6(a), the thrust receiving portion 38A has a base portion 39 fixed to the support portion 31A, and a wall portion 40 that projects radially outward from the base portion 39. The thrust receiving portion 38A is provided on the inlet 11a side of the furnace body 11 and the outlet 11b side of the furnace body 11 with respect to the attachment portion 37, respectively.

Further, the thrust receiving portion 38A has a stopper bolt 41. The stopper bolt 41 is screwed into the wall portion 40 and moved in the axial direction by rotating it. The stopper bolt 41 on the inlet 11a side contacts the first plane 37a of the mounting portion 37. Similarly, the stopper bolt 41 on the outlet 11b side comes into contact with the second plane 37b of the attachment portion 37.

This contact restricts the relative movement of the thrust receiving portion 38A and the attachment portion 37 in the axial direction. The pressing force of the stopper bolt 41 against the mounting portion 37 is set to a value that restricts the relative movement of the thrust receiving portion 38A and the mounting portion 37 in the axial direction, and allows relative movement of both in the radial direction. is set to

The annular member 20 and the furnace main body 11 move together in the axial direction due to mutual engagement of the thrust receiving part 38A and the support part 31A. For example, when the furnace body 11 tries to extend in the axial direction due to thermal expansion of the furnace body 11, the force is transmitted to the annular member 20 via the thrust receiving part 38A and the support part 31A, and the annular member 20 also extends in the axial direction. Moving. As a result, the stress in the axial direction generated in the furnace body 11 is alleviated.

However, when this stress is relaxed, stress concentration tends to occur near the thrust receiving portion 38A on the outer peripheral surface of the furnace body 11. In this example, a support portion 31A is interposed between the thrust receiving portion 38A and the outer peripheral surface 11c of the furnace body 11. Since the support portion 31A is formed in an annular shape extending in the circumferential direction and has a continuous integral structure, it disperses the force transmitted between the thrust receiving portion 38A and the furnace body 11. Therefore, stress concentration near the thrust receiving portion 38A is alleviated. Therefore, progress of deterioration such as metal fatigue on the outer circumferential surface 11c of the furnace body 11, that is, the water pipes 13 and the fins 14, is suppressed, and the operating period of the furnace body 11 can be extended.

<Second embodiment>
An incinerator structure 30B according to a second embodiment of the present disclosure will be described. The incinerator structure 30B according to the second embodiment includes a plurality of terminal parts 32B fixed to the outer peripheral surface 11c of the furnace body 11, and a plurality of terminal parts 32B, instead of the support part 31A of the first embodiment. It includes a plurality of connecting parts 43 that connect mutually adjacent terminal parts 32B, 32B. The other configurations are the same as those in the first embodiment, so their explanation will be omitted.

FIG. 7 is a diagram showing a thrust receiving part 38B as a terminal part 32B and a connecting part 43 according to the second embodiment. As shown in this figure, the thrust receiving part 38B of the second embodiment is directly fixed to the outer circumferential surface 11c of the furnace body 11, unlike the thrust receiving part 38A of the first embodiment.

Further, the connecting portion 43 has a rectangular cross-sectional shape similarly to the supporting portion 31A of the first embodiment, and extends in the circumferential direction. The connecting portion 43 is located between the two thrust receiving portions 38B, 38B, and connects them. This connection means is, for example, welding. Like the thrust receiving part 38B, the connecting part 43 is also fixed to the outer circumferential surface 11c of the furnace body 11.

In the second embodiment, the plurality of terminal portions 32B and the plurality of connection portions 43 constitute an annular support portion 31B extending in the circumferential direction of the furnace body 11. In the example shown in FIG. 7, the thrust receiving portion 38B and the connecting portion 43 constitute an annular support portion 31B. Similarly to the first embodiment, the annular support portion 31B disperses the force transmitted between the thrust receiving portion 38B and the furnace body 11. Therefore, the stress concentration generated near the thrust receiving portion 38B is alleviated.

Note that the leaf spring receiving portion 34 of the first embodiment can also be applied as the terminal portion 32B according to the second embodiment. That is, a plurality of leaf spring receivers 34 may be fixed to the outer circumferential surface 11c of the furnace body 11, and two adjacent leaf spring receivers 34 may be connected by a connector having the same shape as the connector 43. . In this case as well, the stress concentration generated in the vicinity of the leaf spring receiving portion is alleviated.

<Other embodiments>
Instead of the leaf spring 21 shown in FIGS. 4 to 7, spokes 44 may be used as the structure 33. FIG. 8 is an enlarged cross-sectional view of an incinerator structure 30C that employs spokes 44.

The spokes 44 are rod-shaped members extending in one direction. One end of the spoke 44 is swingably supported by a mounting portion (bracket) 45 provided on the inner peripheral surface 20a of the annular member 20. Further, the other end of the spoke 44 is swingably supported by a bolt or the like on a mounting portion (bracket) 46 as a terminal portion 32A, which is fixed to the support portion 31A. Thereby, the furnace body 11 and the annular member 20 are connected via the spokes 44. Note that instead of the spokes 44, pins (not shown) may be used to connect both attachment parts.

Further, similarly to the second embodiment, the attachment portion 46 may be fixed to the outer circumferential surface 11c of the furnace body 11. FIG. 9 shows a modification 30D of the incinerator structure 30C shown in FIG. As shown in this figure, a connecting portion 47 having a configuration similar to that of the second embodiment is provided between two adjacent mounting portions 46, 46, and connects the two mounting portions 46, 46.

Even when the spokes 44 are employed, the same annular support portion as in the first and second embodiments is formed on the outer circumferential surface 11c of the furnace body 11. Therefore, the force transmitted through the spokes 44 is dispersed by the annular support, and the stress concentration near the attachment portion 46 is alleviated.

Note that the present disclosure is not limited to the above-described embodiments, but is indicated by the claims, and further includes all changes within the meaning and range equivalent to the claims.

DESCRIPTION OF SYMBOLS 10... Incinerator, 11... Furnace body, 11a... Inlet, 11b... Outlet, 11c... Outer surface, 12... Cover casing, 13... Water tube, 14... Fin, 15... Stoma, 16... Inlet side header pipe, 17... Outlet Side header pipe, 18... Rotary joint, 19... Seal plate, 20... Annular member (tire), 20a... Inner peripheral surface, 21... Leaf spring, 22... Roller, 23... Drive device, 24... Hopper, 25... Wind box (Duct), 26... Seal device, 27... Secondary combustion chamber, 28... After combustion stoker, 30A to 30D... Incinerator structure, 31A, 31B... Support part, 32A, 32B... Terminal part, 33... Structure, 34 ...Plate spring receiving part, 34a...Engagement hole, 35...Spring body, 36...Convex part, 37, 45, 46...Mounting part (bracket), 37a...First plane, 37b...Second plane, 38A...Thrust receiver Part, 38B...Thrust receiving part, 39...Base, 40...Wall part, 41...Stopper bolt, 42...Main body, 43, 47...Connection part, 44...Spoke, W...Waste

Claims (2)

A furnace body formed in a cylindrical shape,
a plurality of terminal portions that engage with a structure that transmits force to and from the furnace body, are provided along the circumferential direction of the furnace body, and are fixed to the outer peripheral surface of the furnace body;
a plurality of connecting parts located between the plurality of terminal parts, fixed to the outer circumferential surface of the furnace main body, and connecting mutually adjacent terminal parts among the plurality of terminal parts,
One end and the other end of each of the connecting portions in the circumferential direction are respectively connected to one and the other of two mutually adjacent terminal portions among the plurality of terminal portions,
The plurality of terminal parts and the plurality of connection parts constitute an annular support part extending in the circumferential direction of the furnace main body. The incinerator structure according to claim 1, wherein the furnace body is made of metal.

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