JP7228382B2 - Incinerator structure - Google Patents

Description

The present disclosure relates to incinerator structures for waste and the like.

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

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

JP-A-2006-57963 JP-A-2000-329471

The cylindrical furnace body described above is placed sideways and maintains its posture 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 connecting members such as spokes and leaf springs.

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

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 capable of alleviating stress concentration at the connecting portion between the furnace main body and the terminal portion.

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

A second aspect of the present disclosure is an incinerator structure that engages a cylindrically formed furnace body and a structure for transmitting force between the furnace body and a structure for transmitting force along the circumference of the furnace body. a plurality of terminal portions fixed to the outer peripheral surface of the furnace body and a plurality of terminal portions fixed to the outer peripheral surface of the furnace body and connecting adjacent terminal portions among the plurality of terminal portions; and a connection portion, wherein the plurality of terminal portions and the plurality of connection portions constitute an annular support portion extending in the circumferential direction of the furnace body.

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

Advantageous Effects of Invention According to the present disclosure, it is possible to provide an incinerator structure capable of alleviating stress concentration at the connecting portion between the furnace main body and the supporting portion.

1 is a schematic configuration diagram of an incinerator according to an embodiment of the present disclosure; FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. 1; FIG. FIG. 3 is a partially enlarged view of the furnace main body shown in FIG. 2; 1 is a cross-sectional view of an incinerator structure according to a first embodiment of the present disclosure; FIG. 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. FIG. 10 is a diagram showing a thrust receiving portion and a connecting portion as a terminal portion according to the second embodiment; 1 is an enlarged cross-sectional view of an incinerator structure employing spokes; FIG. FIG. 4 is an enlarged cross-sectional view showing a modification of the incinerator structure employing spokes.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In addition, the same code|symbol is attached|subjected to the part which is common in each figure, and the overlapping description is abbreviate|omitted. The incinerator structure according to this embodiment has 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 can also be applied to other incinerators having similar configurations.

For the sake of convenience, an example in which the incinerator structure is applied to a rotary stoker type incinerator (hereinafter referred to as incinerator) will be described. 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 are 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 structure of the incinerator 10 is demonstrated. FIG. 1 is a schematic configuration diagram of an incinerator 10. As shown in FIG. 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.

As shown in FIGS. 1 to 3, the incinerator 10 has a furnace body 11 formed in a tubular shape (see FIG. 2). The furnace body 11 has an inlet 11a for the waste W at its axial upstream end (left end in FIG. 1). Similarly, the furnace body 11 has an outlet 11b for the waste W at the downstream end of the furnace body 11 (the left end in FIG. 1). The furnace body 11 is installed in a slightly inclined state with respect to the horizontal plane (horizontal direction in FIG. 1) so that the outlet 11b is lower than the inlet 11a. The furnace main body 11 is made of metal, and its material is 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 tubes 13 , a plurality of fins 14 , an inlet side header tube 16 and an outlet side header tube 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 tube 13 . The seal plate 19 extends over substantially the entire length of the water pipe 13 and expands radially outward.

The fins 14 are strip-shaped members made of metal that extend in the axial direction. The fins 14 are located between two water tubes 13, 13 adjacent to each other. That is, the water pipes 13 and the fins 14 extend in the axial direction and are alternately arranged 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 pores 15 and the water tubes 13 form a so-called grate. The water pipe 13 and the fins 14 constitute the outer peripheral surface 11c of the furnace body 11, and the furnace body 11 as a whole has a cylindrical shape.

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

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

As shown in FIG. 1, an annular member (tire) 20 is provided on the outer circumference of the furnace body 11 . The annular member 20 is positioned 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 connected by a plate spring 21 as a connecting member so as to be slidable in the radial direction (see FIG. 4).

The annular member 20 rests on rollers 22 . The rollers 22 are rotated by a driving device 23, and this rotation causes the furnace body 11 to rotate. A driving mechanism such as a pin gear may be employed as the driving device 23 . In this case the annular member 20 is directly driven 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 main body 11 by a dust feeder (not shown).

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

As shown in FIGS. 1 and 2, the wind box 25 is split axially and circumferentially. That is, a plurality of primary gas supply passages 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 adjusting device (not shown) such as a damper. For example, the supply destination and supply amount of the primary gas can be optimized according to the composition, amount, and distribution of the waste W remaining in the furnace body 11 .

A seal 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 the respective water pipes 13 come into contact with the seal devices 26 one after another. Each supply channel is appropriately partitioned by this contact, and the primary gas can be appropriately supplied to a desired location.

In the incinerator 10 described above, the waste W is supplied into the incinerator body 11 while the incinerator body 11 is being rotated at a low speed by the driving 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 tilt of the furnace body 11 .

While the waste W is moving through the furnace body 11 , primary gas is supplied from the wind box 25 to the furnace body 11 . The supply amount of the primary gas is set to such an amount that the slow combustion of the waste W is maintained. The interior of the incinerator 10 has reached a high temperature due to the slow combustion of previously charged waste. Under such a condition, the waste W that has been newly introduced goes through the processes of drying, thermal decomposition, and combustion in order from the upstream side of the furnace body 11 toward the downstream side.

Unburned gas generated by the slow combustion is burned in the downstream secondary combustion chamber 27 by supplying secondary gas (for example, air). Further, the unburned portion in the ash of the waste W discharged from the furnace main body 11 is burned in the post-combustion stoker 28 . A so-called post-combustion takes place.

Next, the incinerator structure 30A of this embodiment will be described. FIG. 4 is a cross-sectional view of the incinerator structure 30A. 5 is a partially enlarged view of the cross-sectional view shown in FIG. 4. FIG. 6A is a cross-sectional view taken along VIA-VIA in FIG. 5, and FIG. 6B is a cross-sectional view taken along VIB-VIB in FIG. As shown in these figures, the incinerator structure 30A includes the above-described furnace main body 11, support portions 31A, and terminal portions 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 a ring shape extending in the circumferential direction and 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 and usage environment of the furnace body 11, the size of the terminal portion 32A, and the like. be done.

A plurality of supporting portions 31A may be provided according to the size of the terminal portion 32A. In other words, a plurality of supporting portions 31A may be provided for each group of terminal portions 32A. In this case, the supporting portions 31A are arranged at predetermined intervals in the axial direction to support each terminal portion 32A. By providing a plurality of support portions 31</b>A, it is possible to prevent the support portions 31</b>A 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. A plurality of terminal portions 32A are provided along the circumferential direction of the furnace body 11 and engage with the structure 33 that transmits force to the furnace body 11 . Moreover, the terminal portion 32A has a shape corresponding to the form of engagement with the structure 33 and the shape and dimensions of the structure 33 .

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

(first example)
A first example of the structure 33 is a leaf spring 21 that connects the furnace body 11 and the annular member 20 . A first example of the terminal portion 32</b>A is the plate spring receiving portion 34 that engages with the plate spring 21 .

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

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

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

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

At least the tip of the projection 36 of the leaf spring 21 is positioned inside the engaging hole 34 a of the leaf spring receiving portion 34 . Therefore, due to the width relationship described above, the projection 36 slides on the inner surface of the engagement hole 34a in the radial direction, but is restricted from moving in the circumferential direction with respect to the engagement hole 34a. In other words, the engagement between the convex portion 36 and the engagement hole 34a allows the leaf spring 21 and the leaf spring receiving portion 34 to move relative to each other in the radial direction, and restricts their relative movement in the circumferential direction. be done.

In this manner, a plurality of leaf springs 21 are provided in the circumferential direction so as to surround the outer periphery of the furnace body 11 , and while allowing thermal expansion in the radial direction of the furnace body 11 , the leaf springs 21 are mounted on the furnace body 11 via the leaf spring receiving portions 34 . is 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. Therefore, when the annular member 20 tries to rotate in the circumferential direction, the furnace main body 11 also rotates accordingly. The rotational force of the annular member 20 is transmitted from the plate spring 21 to the plate spring receiving portion 34 via the contact portion between the convex portion 36 and the engagement hole 34a, and further to the furnace main body 11 via the support portion 31A. is transmitted to This transmission of force generates stress on the outer peripheral surface 11 c of the furnace body 11 . In addition, since the plate spring 21 positioned below the furnace main body 11 supports the furnace main body 11 , stress due to these reaction forces is also generated on the outer peripheral surface 11 c of the furnace main body 11 .

Any force described above is transmitted from the leaf spring 21 to the outer peripheral surface 11 c of the furnace body 11 via the leaf spring receiving portion 34 . The transmission path of this force is localized where the plate spring 21 contacts. On the other hand, the leaf spring receiving portion 34 as the terminal portion 32A is a member formed separately from the furnace main body 11 and has higher rigidity than the furnace main body 11 . Therefore, when a rotational force or reaction force is transmitted between the annular member 20 and the furnace main body 11, stress concentration is likely to occur in the vicinity of the plate spring 21 on the outer peripheral surface 11c of the furnace main body 11. FIG. Such stress concentration is a factor that prevents the operating period of the furnace body 11 from being extended.

However, in this example, the supporting portion 31A is interposed between the plate spring receiving portion 34 and the outer peripheral surface 11c of the furnace body 11. As shown in FIG. Since the supporting portion 31A is formed in a ring extending in the circumferential direction and has a continuous integral structure, the force transmitted between the plate spring receiving portion 34 and the furnace main body 11 is dispersed. Therefore, stress concentration in the vicinity of the leaf spring receiving portion 34 is alleviated. Therefore, the progress of deterioration such as metal fatigue in the outer peripheral 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 mounting portion 37 provided on the annular member 20 described above. A second example of the terminal portion 32A is a thrust receiving portion 38A that engages with the mounting portion 37. As shown in FIG.

As shown in FIGS. 5 and 6A, the mounting 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 mounting portion 37 has a first plane 37 a facing the inlet 11 a side of the furnace body 11 and a second plane 37 b facing the outlet 11 b side of the furnace body 11 .

The ends of the two leaf springs 21 are connected (supported) to the mounting portion 37 by fastening members such as bolts. 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 portion 38A is fixed to the support portion 31A. For example, the thrust receiving portion 38A is fixed to the outer peripheral surface 11c of the support portion 31A. Further, the thrust receiving portion 38A is provided at a position facing the mounting portion 37 in the support portion 31A in the radial direction.

As shown in FIG. 6A, the thrust receiving portion 38A has a base portion 39 fixed to the support portion 31A and a wall portion 40 projecting radially outward from the base portion 39. As shown in FIG. The thrust receiving portions 38A are provided on the inlet 11a side of the furnace main body 11 and the outlet 11b side of the furnace main body 11 with respect to the mounting portion 37, respectively.

Further, the thrust receiving portion 38A has a stopper bolt 41. As shown in FIG. The stopper bolt 41 is screwed into the wall portion 40 and is moved in the axial direction by being rotated. The stopper bolt 41 on the side of the inlet 11 a contacts the first flat surface 37 a of the mounting portion 37 . Similarly, the stopper bolt 41 on the outlet 11b side abuts on the second flat surface 37b of the mounting portion 37 .

Due to these abutments, relative axial movement of the thrust receiving portion 38A and the mounting portion 37 is restricted. The pressing force of the stopper bolt 41 against the mounting portion 37 is a value that restricts the relative movement of the thrust receiving portion 38A and the mounting portion 37 in the axial direction and permits the relative movement of the two in the radial direction. is set to

Due to the engagement between the thrust receiving portion 38A and the support portion 31A, the annular member 20 and the furnace main body 11 move together in the axial direction. For example, when the furnace body 11 attempts to expand 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 portion 38A and the support portion 31A, and the annular member 20 also extends in the axial direction. Moving. As a result, the axial stress generated in the furnace body 11 is relieved.

However, when this stress is relieved, stress concentration tends to occur in the vicinity of the thrust receiving portion 38A on the outer peripheral surface of the furnace body 11 . In this example, the support portion 31A is interposed between the thrust receiving portion 38A and the outer peripheral surface 11c of the furnace body 11. As shown in FIG. Since the supporting portion 31A is formed in a ring extending in the circumferential direction and has a continuous integral structure, the force transmitted between the thrust receiving portion 38A and the furnace body 11 is dispersed. Therefore, stress concentration in the vicinity of the thrust receiving portion 38A is alleviated. Therefore, the progress of deterioration such as metal fatigue in the outer peripheral 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 portions 32B fixed to the outer peripheral surface 11c of the furnace body 11 instead of including the support portion 31A of the first embodiment, and A plurality of connecting portions 43 connecting the terminal portions 32B, 32B adjacent to each other are provided. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

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

Moreover, the connection part 43 has a rectangular cross-sectional shape like the support part 31A of 1st Embodiment, and is extended|stretched in the circumferential direction. The connecting portion 43 is positioned between the two thrust receiving portions 38B, 38B and connects them. This connecting means is for example welding. Like the thrust receiving portion 38B, the connecting portion 43 is also fixed to the outer peripheral surface 11c of the furnace body 11. As shown in FIG.

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

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

<Other embodiments>
A spoke 44 as the structure 33 may be used instead of the leaf spring 21 shown in FIGS. 8 is an enlarged cross-sectional view of an incinerator structure 30C employing spokes 44. FIG.

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 20 a of the annular member 20 . The other end of the spoke 44 is pivotably supported by a mounting portion (bracket) 46 as the terminal portion 32A fixed to the support portion 31A. Thereby, the furnace main body 11 and the annular member 20 are connected via the spokes 44 . It should be noted that pins (not shown) may be used instead of the spokes 44 to connect both mounting portions.

In addition, the mounting portion 46 may be fixed to the outer peripheral surface 11c of the furnace body 11 as in the second embodiment. FIG. 9 is a modification 30D of the incinerator structure 30C shown in FIG. As shown in this figure, a connecting portion 47 having the same configuration as in the second embodiment is provided between two mounting portions 46, 46 adjacent to each other to connect the two mounting portions 46, 46 together.

Even when the spokes 44 are employed, an annular support portion similar to that in the first and second embodiments is formed on the outer peripheral surface 11c of the furnace body 11. As shown in FIG. Accordingly, the forces transmitted through the spokes 44 are distributed by the annular support, and stress concentrations near the mounting portion 46 are alleviated.

It should be noted that the present disclosure is not limited to the above-described embodiments, but is indicated by the description of the scope of claims, and further includes all modifications within the meaning and scope equivalent to the description of the scope of claims.

DESCRIPTION OF SYMBOLS 10... Incinerator, 11... Furnace main body, 11a... Inlet, 11b... Outlet, 11c... Outer peripheral surface, 12... Cover casing, 13... Water tube, 14... Fin, 15... Pore, 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 Plate spring 22 Roller 23 Drive device 24 Hopper 25 Wind box (Duct) 26 Seal device 27 Secondary combustion chamber 28 Post-combustion stoker 30A to 30D Incinerator structure 31A, 31B Support part 32A, 32B Terminal part 33 Structure 34 Leaf spring receiving portion 34a Engagement hole 35 Spring body 36 Convex portion 37, 45, 46 Mounting portion (bracket) 37a First plane 37b Second plane 38A Thrust receiver Part, 38B... Thrust receiving part, 39... Base part, 40... Wall part, 41... Stopper bolt, 42... Main body, 43, 47... Connecting part, 44... Spoke, W... Waste

Claims (1)

a metal furnace body formed in a cylindrical shape;
a support portion formed in an annular shape extending in the circumferential direction of the furnace body and welded to the outer peripheral surface of the furnace body;
a plurality of terminal portions engaged with a structure that transmits force between the furnace body and provided along the circumferential direction of the furnace body and fixed to the support portion ;
The incinerator structure , wherein a plurality of the support portions are provided at intervals in the axial direction of the furnace body with respect to the group of the plurality of terminal portions.

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