JPH074630A - Refuse incinerator - Google Patents

Abstract

PURPOSE:To completely burn flame retardant refuse having a large shape and to make incombustible matter take globular forms by slowly fluidizing the refuse to an incinerated residue discharge port by a slewing flow. CONSTITUTION:A plurality of plenum chambers 3, 4, 5 aligned in a longitudinal direction are provided under a fluidized air discharge bed 2 inclined down rearward from a position directly under a refuse inlet 1a to an incinerated residue discharge port. The chambers 3, 4, 5 are laterally partitioned to a plurality of plenum chamber parts 31',..., 41',..., 51',..., thereby to differentiate air supply amounts to the adjacent chamber parts of the chambers 3, 4, 5 thereby to form slewing flows 23a, 23b, 23c crossing obliquely to the bed 2 to fluidized beds 11a, 11b, 11c corresponding to the chambers 3, 4, 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refuse incinerator which incinerates refuse such as municipal refuse and industrial waste in a fluidized bed.

[0002]

2. Description of the Related Art A conventional refuse incinerator of this type is shown in FIG.
As shown in each of (A) to (C), a fluidized air jet bed 2 extending in a downward slope to the incineration residue discharge port 1b is provided in the furnace body 1, and below the fluidized air jet bed 2, A plurality of air boxes 3a are arranged in parallel in the direction of inclination of the floor 2, and the fluidized air supplied to each air box 3a is supplied with the fluidized air jet bed 2
It is configured so that the fluidized bed 11 made of a granular fluidized medium such as silica sand is formed on the floor 2 by jetting from the bed.

Thus, in such a conventional furnace, the wind box 3
By making the amount of air supply to a ... different, a swirling flow 23 swirling in the inclination direction of the floor 2 is formed, and the dust introduced into the fluidized bed 11 is burned while being stirred with the fluidizing medium and air, The burned material and the incombustible material are made to flow down along the floor 2 and discharged to the incineration residue discharge port 1b.

[0004]

However, since garbage such as municipal waste and industrial waste has various shapes and materials, depending on the shape and properties of the garbage thrown into the fluidized bed 11. There is a problem that good incineration cannot be performed.

That is, a flame-retardant heavy material such as a lump having a large flame-retardant property does not stay in the fluidized bed 11 for a long time due to the swirling flow 23, and rather, the bed 2 is not. Since the swirling flow 23 along the inclination direction facilitates the flow down on the floor 2, the flow down to the discharge port 1b is achieved in a relatively short time. Therefore, a flame-retardant heavy object that requires a long time to burn is difficult to be completely combusted in the fluidized bed 11 and may be discharged from the discharge port 1b together with an incombustible material in an unburned state. Also,
In the post-treatment of the incineration residue discharged from the discharge port 1b, it is preferable to make the incombustibles spherical by rolling on the floor 2, but the swirl flow 23 causes the incombustibles to reach the discharge port 1b. Since the flow-down is promoted, there is a problem that the rolling on the floor 2 is not sufficiently performed and it is difficult to spheroidize the incombustible material satisfactorily.

In order to avoid the generation of such unburned substances, it has been attempted to crush the dust in advance. However, performing such pretreatment not only increases the economic burden such as equipment cost and operating cost, but also causes combustion problems. That is, for crushable light dust such as paper and plastic, when it is crushed, the proportion of floating combustion inevitably increases, and the amount of combustion in the fluidized bed 11 decreases. It becomes difficult to maintain the temperature at a predetermined temperature. Moreover, the crushed lightweight dust explosively combusts when it is thrown into the fluidized bed, which causes large pressure fluctuations in the furnace, shortage of combustion air, and a large amount of CO generation. This will lead to the generation of harmful dioxins. In an incinerator with a large internal swirl strength in a fluidized bed or an incinerator that swirls the entire fluidized bed, the bed portion into which dust is put is at the same temperature level as other bed portions (for example, 600 ° C to 900 ° C). Therefore, when combustible waste is thrown into the fluidized bed even if it is not crushed, it rapidly dries and combusts to generate a large amount of pyrolysis gas, and CO and dioxin due to lack of combustion air are generated. May occur in large numbers. Further, as one of the solutions to such a problem, it has been attempted to intermittently introduce dust and to temporarily weaken the strength of the swirling flow at the time of dust introduction, but in this way, It positively reduces the effects of swirling flow (stirring effect to promote combustion of flame-retardant heavy materials, spheroidization of non-combustible materials, etc.). It causes large pressure fluctuations and is by no means an effective solution.

The present invention has been made in view of the above points, and an object thereof is to provide a refuse incinerator capable of stably and satisfactorily burning refuse without requiring pretreatment such as crushing treatment. It is what

[0008]

DISCLOSURE OF THE INVENTION The present invention is provided in a furnace body,
Provide a fluidized air jet bed that extends in a downward slope from just below the refuse inlet to the incineration residue outlet, and under the fluidized air jet bed, install a plurality of wind boxes parallel to the floor inclining direction. In a refuse incinerator configured to form a fluidized bed on the bed by ejecting fluidized air supplied to each air box into the furnace from a fluidized air jet bed, the above object is achieved. Therefore, in particular, each air box is divided into a plurality of air box parts in a direction orthogonal to the tilt direction, and fluidized air is separately supplied to each air box part and the air box to the adjacent air box part in each air box. An air supply mechanism configured to make the air supply amounts different is provided so that a swirling flow in a direction intersecting the tilt direction is formed in the fluidized bed portion corresponding to each wind box. It is a proposal.

Therefore, in the refuse incinerator having such a configuration, it is preferable that each component is configured as follows.

That is, the fluidized air supply mechanism makes the difference in the supply air amount between the adjacent air box parts in the air box on the dust inlet side smaller than the difference in the supply air amount between the adjacent air box parts in the other air boxes. It is preferable that the strength of the swirl flow in the fluidized bed portion on the dust input port side is made weaker than the strength of the swirl flow in the other fluidized bed portions.
Further, this fluidized air supply mechanism alternately changes the air supply amount to the adjacent air box part for at least the air box on the incineration residue discharge port side, thereby changing the swirling flow in the fluidized bed part corresponding to the air box. It is preferable that the direction is reversed.

A fluidized air jet bed has a floor plate extending obliquely downward from immediately below the dust feed port to the incineration residue discharge port, and a large number of nozzles arranged in parallel in the tilt direction and the direction orthogonal thereto are planted. It is preferable that each of the nozzles is provided with an ejection hole for ejecting the fluidized air at an inclination angle of 0 ° to 45 ° in the incineration residue discharge port direction with respect to the orthogonal direction.

[0012]

A plurality of wind boxes are arranged in parallel in the slanting direction of the fluidized spouted bed, and swirling flows are formed in the fluidized bed portions corresponding to the respective wind boxes in the directions intersecting with the slanting direction. By the action of the swirling flow, the dust is advanced to the incineration residue discharge port while being swung on the floor in a direction intersecting with the downflow direction. Therefore, even a flame-retardant heavy substance such as a flame-retardant large lump will be burned sufficiently for a long time before reaching the incineration residue discharge port, and will not be completely burned. Moreover, it is not discharged from the outlet in the unburned state. In addition, incombustibles flow down while being swung as described above, that is, they are sufficiently rolled on the floor, so they are surely spheroidized at the stage when they reach the discharge port, and the incineration residue The post-treatment can be satisfactorily performed. Moreover, since it is not necessary to subject the waste to a pretreatment such as a crushing treatment in advance, the economical burden such as facility cost and operating cost required for this is not added.

For combustible waste, if the stirring action in the fluidized bed is strong, as described at the beginning, the material is dried and pyrolyzed at the moment when it is put into the fluidized bed, and the combustion air becomes insufficient. This may lead to the generation of CO and dioxin. However, as described above, if the strength of the swirl flow in the fluidized bed portion on the dust input port side is set to be weaker than the strength of the swirl flow in the other fluidized bed portions, in the fluidized bed portion where the dust is thrown in. Since the stirring action is small, even combustible waste is slowly dried, pyrolyzed, and burned. Therefore, the generation of CO and dioxins can be effectively suppressed without causing a shortage of combustion air due to the introduction of dust.

Further, as described above, if the direction of the swirling flow is alternately inverted at least in the fluidized bed portion corresponding to the wind box on the side of the incineration residue discharge port, stirring and rocking of dust are promoted. Therefore, the complete combustion of the flame-retardant material and the spheroidizing of the non-combustible material can be performed more effectively.

Further, a nozzle for ejecting fluidized air is
With the above-mentioned structure, the combustibles and the non-combustibles can be smoothly moved on the fluidized air jetting bed, and can be smoothly discharged from the discharge port.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be specifically described below based on the embodiments shown in FIGS.

In the refuse incinerator shown in FIG. 1, 1 is a furnace main body having front and rear portions with a waste charging port 1a and an incinerator residue discharge port 1b, 2 is a fluidized air jet bed provided in the furnace main body 1, 3, 4 and 5 are air boxes provided under the fluidized air jet bed 2, and 6 is an air supply mechanism for supplying fluidized air to the air boxes 3, 4, and 5.

As shown in FIGS. 1 and 2, the fluidized air jet bed 2 extends downwardly from directly below the dust input port 1a toward the rear and slopes downward to reach the incineration residue discharge port 1b. A set of fluidized air jets 8, 9 and 10 are arranged in parallel in the front-rear direction.
By ejecting the fluidized air supplied to 4,5, the fluidized bed 11 made of a granular fluidized medium such as silica sand or alumina can be formed on the floor plate 7. The inclination of the fluidized air jet bed 2, that is, the inclination angle α of the floor plate 7 with respect to the horizontal plane is in the range of 5 ° to 25 °, and is appropriately set according to the incineration conditions such as the property of dust.

Each fluidized air ejector 8, 9, 10 is shown in FIG.
~ As shown in FIG. 3, a plurality of columnar nozzles 8 '..., 9' ...,
10 '... are arranged in parallel in the left-right direction at regular intervals, and each column nozzle 8', 9 ', 10' is composed of a plurality of nozzles 1.
2 ... are closely connected in the front-rear direction (see FIG. 3). Tandem nozzle 8 '... are in front ejector 8, in the horizontal direction, the first column nozzle group 8' ₁ ..., divided into second column nozzle group 8 _'2 ..., and the third column nozzle group 8' ₃ ... 3 groups Has been. Similarly, the tandem nozzle 10 '... also in tandem nozzle 9' ... and subsequent ejectors 10 in the middle ejector 9, respectively, in the horizontal direction, the first column nozzle group 9 _'1 ..., 10' ₁ ..., the second column Nozzle group 9 '
₂ ..., 10 _'2 ..., and the third column nozzle group 9' ₃ ..., 10
It is divided into three groups of ' ₃ ... (See FIG. 2).

As shown in FIGS. 2 to 6, each nozzle 12 is screwed into a box-shaped main body 13 having a mountain-shaped upper surface and a communication cylinder 13b projecting from the center of the lower surface of the main body 13. It is composed of a tubular mounting portion 14 that is coupled and connected, and a nut portion 15 that is screwed into the mounting portion 14. Four engaging claws 14a are provided at the lower end of the mounting portion 14 so that the nozzle 12 can be detachably engaged and fixed to the engaging hole 7a of the floor plate 7 by tightening the nut portion 15. It has become. That is, the engaging hole 7a has a shape that matches the lower surface shape of the mounting portion 14 including the engaging claws 14a, and the lower end portion of the mounting portion 14 is inserted into the engaging hole 7a, and this is approximately 45. Are rotated to engage the engaging claws 14a with the lower surface of the floor plate 7, and the nut 15 is tightened so that the nozzle 12 is fixed to the floor plate 7.
It can be fixed to (see FIGS. 5 and 6). By the way, as shown in FIG. 2, the columnar nozzles 8 ', 9', 10 'in the fluidizing air ejectors 8, 9, 10 are closely connected in the front-rear direction, and the upper surface thereof has a series of ridge lines. It forms a mountain-shaped surface 12a. Further, a refractory material layer 7b is formed on the floor plate 7, and the nozzle 12 is attached to the main body 13
It is buried in the refractory material layer 7b except for.

Further, as shown in FIGS. 3 and 5, fluidized air is jetted substantially horizontally to the left and right side walls of the main body 13 of each nozzle 12 in the rear direction with a constant inclination angle β. The air ejection holes 13a ... Are bored at regular intervals in the front-rear direction. The inclination angle β of each ejection hole 13a with respect to the left-right direction is 0 depending on the incineration conditions such as the property of dust.
Although it is appropriately set in the range of ° to 45 °, β is set to 45 ° in this embodiment.

The wind box is, as shown in FIGS. 1 and 2, front and rear.
It is divided into three wind boxes 3, 4 and 5 that are parallel to each other.
Fluidizing air ejectors corresponding to boxes 3, 4, and 5
Fluidized air is supplied to 8, 9, 10
It Furthermore, as shown in FIGS. 2 and 4, the front wind box 3 is
First to third wind box parts 3'in the left-right direction₁, 3 '₂，
3 '₃It is divided into each wind box part 3 '₁, 3 '₂，
3 '₃From each column nozzle group 8'of the front-stage ejector 8₁…, 8
´₂…, 8 '₃Fluidized air is supplied separately to each.
It has become. Similarly, the middle stage wind box 4 and the rear stage wind box 5 also
As shown in FIGS. 2 and 4, the first to the third in the left-right direction.
Wind box part 4 '₁, 4 '₂, 4 '₃And 5 ' ₁, 5 '₂，
5 '₃It is divided into each wind box part 4 '₁, 4 '₂，
4 '₃And 5 '₁, 5 '₂, 5 '₃Corresponds to this
Each column nozzle group 9 '₁…, 9 '₂…, 9 '₃… And 10
´₁…, 10 '₂…, 10 '₃Fluidized air for each
It is being supplied.

As shown in FIG. 4, the air supply mechanism 6 guides the air box parts 3 ', 4', 5'to an air supply pipe 16 connected to an air supply source (not shown) such as a compressor. The air pipes 17 ..., 18 ..., 19 ... are branched and connected, and the dampers 20, 21, 22 are interposed in each of the air pipes 17, 18, 19 so that they are adjacent to each other in the wind boxes 3, 4, 5. It is configured to supply different amounts of fluidized air to the wind box portion.

In this embodiment, with respect to the front wind box 3,
First and third wind box part 3 '₁, 3 ' ₃The same amount P₁Flow of
Supplying motive air and second wind box part 3 '₂Less than this
Quantity P ₂So that each fluidized air can be supplied to each damper 20.
₁, 20₂, 20₃Has been set. According to
In the upstream fluidized bed portion 11a corresponding to the upstream air box 3.
The first and third tandem nozzle groups 8 '₁…, 8 '₃… Or
The amount of air blown from the second column nozzle group 8 '₂Gush from ...
As the amount of air becomes larger than the amount of air, as shown in FIG.
Swirl flow 23a, 2 which is orthogonal to the inclination direction of 2 and goes inward
3a will be formed. On the other hand, the middle wind box 4 and the rear
For the windbreak box 5, each damper 21₁, 21₂, 21₃
And 22₁, 22₂, 22₃Switch the opening degree between large and small
Freely supply air between the wind box parts of each wind box 4 and 5.
Sequence control so that the difference in volume is converted to positive / negative
Therefore, the middle fluidized bed portion 11 corresponding to each wind box 4 and 5
b and the latter stage fluidized bed portion 11c, the inclination direction of the floor 2
Swirling flow 23b, 23b and 23c, 23c orthogonal to
While forming it, the turning direction is sequential
It is designed to change. That is, the first and the first
3 wind box part 4 '₁, 5 '₁And 4 '₃, 5 '₃about
Is a large supply R₁And the second wind box part 4 '₂, 5 '₂To
For small amount R₂As swirling flows 23b, 23c
To form inward direction (shown by the solid line in Fig. 2)
State) and the first and third wind box parts 4 ' ₁, 5 '₁as well as
4 '₃, 5 '₃About small supply R₂And the second wind
Box part 4 '₂, 5 '₂For large supply R₁As
Each swirl flow 23b, 23c is formed in the outward direction.
Change state (state shown by the broken line in FIG. 2) and
It is designed to be transformed. Also, each air supply amount Q₁，
Q₂, R₁, R₂And switching conditions for each damper 21, 22
Is set appropriately according to the combustion conditions of the waste, etc.
In the embodiment of FIG.
(Q₁-Q₂) Is empty in the middle wind box 4 and the rear wind box 5.
Air supply amount difference (R₁-R₂) Smaller than the previous fluidized bed
The swirl flow strength in the portion 11a is equal to the middle fluidized bed portion 11b.
And weaker than the swirl flow strength in the latter fluidized bed portion 11c.
It has been devised so that That is, the former fluidized bed portion 11
In a, the stirring action of dust with the fluid medium and air flows.
To be weaker than normally required in a fluidized bed reactor
Has been devised.

In the refuse incinerator configured as described above, the refuse introduced into the fluidized bed 11 through the inlet 1a is
It is agitated with the fluid medium and air, dried and burned, and the burned material and the incombustible material are discharged to the incineration residue discharge port 1b.

At this time, since the swirl strength is weak in the front-stage fluidized bed portion 11a into which the dust is thrown in from the throw-in port 1a, and the dust is not agitated with the fluid medium and air strongly, the throw-in port 1a is thrown in. Even if the generated dust is easy to burn, it is not dried, pyrolyzed, or burned rapidly,
These will be done slowly. Therefore, a situation in which a large amount of pyrolysis gas is not generated and the combustion air is insufficient can be avoided. As a result, the generation of CO and dioquincin is effectively suppressed.

Further, heavy dust flows down on the floor 2 in the direction of its inclination, and the flow-down operation is carried out very slowly by the action of the swirling flows 23a, 23b, 23c intersecting the flow-down direction. become. That is, the dust thrown in through the inlet 1a gradually flows down on the floor 2 while being swung in the left-right direction by the swirling flow, and the time required to reach the outlet 1b, that is, the combustion time is extremely long. (Specifically, when the conditions such as the length of the floor 2 in the inclination direction are the same, it is 10 times or more compared with the conventional furnace shown in FIG. 9). Moreover, the middle fluidized bed portion 11
b and the latter-stage fluidized bed portion 11c, the swirling flows 23b, 23
Since c is strong and the swirling direction is sequentially reversed, the agitation of the dust is performed more effectively, and its drying and combustion are promoted. Since the turning direction is changed so as to intersect with the dust flow direction, there is no fear of adversely affecting the dust flow operation. Therefore, the conversion of the turning direction can be freely performed according to the combustion state without any restriction.

Therefore, even when the dust is a flame-retardant heavy substance such as a flame-retardant large lump, it is dried and burned for a sufficient time,
When it reaches the discharge port 1b, it is surely completely burned. Therefore, unlike in the conventional furnace, the flame-retardant dust is not discharged from the discharge port 1b in an unburned state. In addition, the non-combustible material is sufficiently rolled forward, backward, leftward and rightward on the floor 2 in combination with the reversal of the turning direction, so that the spheroidizing is performed well.

By the way, each columnar nozzle group 8 ', 9', 1
0's are connected in the downflow direction and the upper surface is a series of chevron 1
Since it is set to 2a, in addition to the fact that the nozzle 12 is buried in the refractory material layer 7a except for the main body portion 13, the dust can be smoothly moved on the floor 2. Further, since each nozzle 12 has a structure that can be easily attached and detached from the upper side of the fluidized air ejection bed 2 as described above, on-site construction and repair can be easily performed.

The present invention is not limited to the above-mentioned embodiments, but can be appropriately improved and changed without departing from the basic principle of the present invention.

That is, the shape, arrangement, etc. of the nozzles 12 are arbitrary as long as they do not hinder the movement of dust on the floor 2. For example, as shown in FIG. 7 and FIG. The upper surface of 13 may have a hemispherical shape, and the nozzles 12 may be arranged in a scattered manner at regular intervals in the front-rear direction and the left-right direction. In this case, the main body 13 has a jet port 1 with β = 0 ° to 45 °.
In addition to forming 3a and 13a, it is preferable to form small holes 13'a for air cooling for preventing burnout of the nozzle 12.

Further, in the above-mentioned embodiment, the wind box is divided into 9 in the front-rear and left-right directions, but the number of divisions in the front-rear direction and the number of divisions in the left-right direction of the wind box depend on the area of the fluidized air ejection bed 2, the combustion conditions, and the like. It can be set arbitrarily according to the requirement.

Further, in the air supply mechanism 6, the amount of air supplied to each wind box part 3 ', 4', 5'and the difference in the supplied air amount between the left and right adjacent wind box parts are appropriately set according to the combustion conditions and the like. Can be set to, and its control method is also arbitrary.

[0034]

As is apparent from the above description, in the refuse incinerator according to claim 1, since the refuse flows to the incineration residue discharge port over a period of time, flame-retardant refuse is also generated. This can be completely burned, and there is no incineration failure such that unburned matter is discharged from the discharge port. Moreover,
The non-combustible material rolls sufficiently and is discharged from the discharge port in a surely spherical state. Therefore, it is possible to efficiently and economically incinerate various kinds of dusts having various shapes and properties without pretreatment, and its practical value is extremely large.

Further, in the refuse incinerator according to claim 2,
Even if the waste introduced from the waste input port is easy to burn, drying, pyrolysis, and combustion are performed slowly, preventing a temporary shortage of combustion air due to a large amount of pyrolysis gas. Thus, the generation of CO and dioxin can be effectively suppressed.

Further, in the refuse incinerator according to claim 3,
It is possible to promote the burning of dust, the spheroidization of incombustibles, etc., and to further improve the efficiency of incineration.

Further, in the refuse incinerator according to claim 4,
The dust can be smoothly moved on the fluidized air jet bed, and the incineration process can be performed more effectively.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a refuse incinerator according to the present invention.

FIG. 2 is a perspective view showing a main part thereof.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing an air supply system to the wind box.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is an exploded perspective view of a nozzle.

FIG. 7 is a cross-sectional view showing a modified example of the nozzle.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a sectional view showing a conventional furnace.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Furnace main body, 1a ... Garbage input port, 1b ... Incineration residue discharge port, 2 ... Fluidized air ejection bed, 3, 4, 5 ... Wind box, 3
_{'1, 3'2, 3'3,} 4' _1, 4 _'2, 4' ₃ 5'
_{1, 5'2, 5'3} ... wind box portion, 6 ... air supply mechanism, 7
... floorboards, 8,9,10 ... fluidizing air ejector, 8 _1,
9 ₁ , 10 ₁ ... Cascade nozzle, 7a ... Engagement hole, 11 ... Fluidized bed, 11a, 11b, 11c ... Fluidized bed portion, 12 ... Nozzle, 13a ... Jet hole, 23a, 23b, 23c ... Swirling flow.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eisho Hidaka 1-32 Dojimahama, Kita-ku, Osaka City, Osaka Prefecture Takuma Co., Ltd.

Claims (4)

[Claims] 1. A fluidized air jet bed is provided in the main body of the furnace, the fluidized air jet bed extending downwardly from a position immediately below the refuse feed port to the incineration residue discharge port, and below the fluidized air jet bed, a tilting direction of the bed. A plurality of air boxes arranged in parallel with each other, and the fluidized air supplied to each air box is jetted into the furnace from the fluidized air jet bed to form a fluidized bed on the floor. In the incinerator, each air box is divided into a plurality of air box parts in the direction orthogonal to the tilt direction, and fluidized air is separately supplied to each air box part and to the adjacent air box parts in each air box. An air supply mechanism configured to make the air supply amounts different is provided, and a swirling flow in a direction intersecting with the tilt direction is formed in the fluidized bed portion corresponding to each wind box. And a garbage incinerator. 2. The fluidized air supply mechanism makes the difference in the supply air amount between the adjacent air box parts in the dust box on the dust inlet side smaller than the difference in the supply air amount between the adjacent air box parts in the other air boxes. Then, the strength of the swirl flow in the fluidized bed portion on the dust input port side is made weaker than the strength of the swirl flow in the other fluidized bed portions. Waste incinerator to list. 3. The fluidized air supply mechanism alternately changes the air supply amount to the adjacent air box part at least for the air box on the side of the incineration residue discharge port so that the fluidized bed part corresponding to the air box. Is configured so as to alternately reverse the direction of the swirling flow in
The refuse incinerator according to claim 1 or 2. 4. The fluidized air jet bed has a floor plate extending obliquely downward from immediately below the dust inlet to the incineration residue outlet, and a plurality of nozzles arranged in parallel in the inclination direction and the direction orthogonal thereto. Each of the nozzles is provided with an injection hole for ejecting fluidized air at an inclination angle of 0 ° to 45 ° in the incineration residue discharge port direction with respect to the orthogonal direction. The waste incinerator according to claim 1, claim 2, or claim 3.