JPH04214110A - Fluidized bed incinerator for waste - Google Patents

Abstract

PURPOSE:To discharge incombustible wastes smoothly by projecting the air blow-out port and upper end cap of an air dispersion pipe so as to follow the inclination of the air dispersion plate of a fluidized bed combustion chamber and positioning the air blow-out port at a height between the neighboring air blow-out ports and directing the air dispersion port's blow-out towards the side of a discharge port. CONSTITUTION:The air dispersion plate 40 of a fluidized bed combustion chamber 70 is provided with this plate inclined so as to position its upper face 44 on the side facing the combustion chamber 70 lower than the side of the discharge port 50 for the fluidizing medium and incombustible wastes. In this dispersion plate 40 many air dispersion pipes 41 are provided with their air blow-out ports 43 and upper end caps 42 projecting from the upper face of the dispersion plate 40, and the air blow-out ports 43 of the air dispersion pipes 41 which are adjacent in the direction of inclination of the upper face 44 and the upper end caps 42 follow the inclination of the upper face 44 so that their heights have a height difference successively from low to high. The air blowout port 43 of the air dispersion port 41 is provided at the position of a height between the upper end caps of the air dispersion pipes 41 that are neighboring in the direction of the inclination of the upper face 44, and the air blow-out port 43 of each air dispersion pipe 41 is directed so that at least the air out of the port 43 is blown out towards the side of the discharge port 50.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a fluidized bed combustion device for waste, which burns and incinerates waste such as waste plastics that are separated from shredder dust, municipal waste, etc. and contain incombustible materials such as iron scraps. It is related to.

0002

2. Description of the Related Art Conventionally, a fluidized bed incinerator as a fluidized bed combustion apparatus for burning and incinerating waste materials such as waste plastics containing incombustible materials such as iron scraps has been constructed as shown in FIG.

Reference numeral 12 denotes a fluidized combustion chamber, and an air dispersion tube 11 consisting of a plurality of horizontal tubes is installed inside the fluidized combustion chamber so as to cross the combustion chamber 12. A large number of air outlets 11a are formed at diagonally downward positions in the air dispersion pipe 11, and the air sent to the air dispersion tube 11 by the air blower 13 via the piping 15 is ejected from the air outlets 11a and flows. medium 10
A is fluidized to form a fluidized bed 10. This fluidized bed 10 is maintained at a predetermined high temperature. Waste containing noncombustible materials such as iron scraps is introduced into the fluidized bed 10 from above the fluidized combustion chamber 12 and fluidized and combusted therein, and the noncombustible materials are transferred to the fluidized medium 10a.
At the same time, it passes through the lower discharge port 12a of the fluidized combustion chamber 12 and is extracted out of the machine by the screw feeder 16. The noncombustibles and the fluid medium were then sent to the separator 17, where the noncombustibles and the fluid medium were separated by the screen 17a, and the noncombustibles remaining on the screen 17a were discharged outside the separator 17 and passed through the screen 17a. The fluidized medium is returned to the fluidized combustion chamber 12 again by the circulating conveyor 18 for use. In this way, when waste mixed with non-combustible materials is burned, the non-combustible materials accumulate in the fluidized combustion chamber 12, so the non-combustible materials are transferred to the fluidized combustion chamber 1.
It is necessary to remove it from 2.

By the way, the air dispersion tubes 11 for fluidizing the fluidized medium in the fluidized combustion chamber are arranged at intervals in the horizontal direction, and the non-combustible materials, together with the fluidized medium, fill the gaps between the dispersion tubes 11. However, elongated iron scraps such as wires and large noncombustible materials do not pass through this gap and get caught and gradually accumulate, which not only prevents noncombustible materials from being smoothly discharged but also prevents fluidization. Therefore, there is a problem that fluid combustion of waste cannot be performed. This problem becomes more serious as the spacing between the dispersion tubes 11 becomes smaller. Note that there is a limit to increasing the distance between the dispersion tubes 11 from the viewpoint of uniform fluidization.

On the other hand, FIG. 6 shows a case where the structure of the air dispersion section is an air dispersion plate 20. In FIG. In Figure 6,
21 is a vertical air dispersion tube, and a cap 2 is attached to the upper end.
1a is fixed, and a plurality of air jet ports 21b are formed at equal intervals in the circumferential direction below it. A large number of air dispersion tubes 21 formed in this way are connected to a horizontal partition plate 22.
It is fixed and placed by. Each air distribution tube 21
A water cooling pipe 23 is provided between them by a partition plate 22. Reference numeral 24 denotes refractories attached above and below the partition plate 22. The upper surface 20a of the dispersion plate 20 (the upper surface of the refractory 24) is a horizontal plane. Although not shown, the discharge ports for the incombustible material and the fluidized medium are provided in the furnace wall at a position slightly above the air distribution plate 20.

In the air distribution plate 20 having such a configuration, air is taken into the air distribution pipe 21 from the air chamber 25, and is ejected from the air outlet 21a to the upper side of the fluidization combustion chamber 26, thereby fluidizing the fluidized medium. A fluidized bed is formed in which the waste is combusted, but in the air dispersion tube 21 with this structure, non-combustible materials such as elongated iron scraps tend to get caught between the caps 21a between adjacent caps 21a at the upper end of the dispersion tube 21. Incombustibles are not smoothly discharged out of the furnace, and the air dispersion pipe 11 with the horizontal structure
I have a similar problem with the type.

[0007]

[Problem to be solved by the invention] As mentioned above, the problem to be solved is that when waste containing incombustibles is subjected to fluidized combustion, the incombustibles cannot be smoothly discharged out of the furnace. The problem is that fluidized combustion cannot be performed stably.

[0008]

[Means for Solving the Problems] The present invention provides an air dispersion plate of a fluidized combustion chamber so that the upper surface of the side facing the combustion chamber is inclined such that the outlet side for the fluidized medium and non-combustibles is at a lower level. , a large number of air dispersion tubes are provided on the air dispersion plate with their air outlets and upper end caps protruding from the upper surface of the air dispersion plate, and the air dispersion tubes' air outlets and upper end caps are arranged adjacent to each other in the direction of inclination of the upper surface. have height differences sequentially according to the inclination of the upper surface, and the air outlet of the air dispersion tube is provided at a height position between the upper end caps of the air dispersion tubes adjacent to each other in the direction of the inclination of the upper surface. The most important feature is that the air outlet of the air dispersion tube is oriented in such a direction that at least air is ejected toward the outlet.

[0009] Furthermore, the above configuration is characterized in that the amount of air blown out from the air dispersion tubes of the air dispersion plate is larger on the side of the outlet than on the side opposite the outlet.

0010

[Operation] In the fluidized combustion chamber, the fluidized medium is fluidized by the air ejected from each air distribution tube of the air distribution plate to form a fluidized bed. Therefore, the air distribution plate is provided so that the upper surface of the side facing the fluidized combustion chamber is inclined such that the discharge port side for the fluidized medium and non-combustibles is at a lower level, and the air outlet of the air distribution tube is The height difference is made sequentially according to the slope of the upper surface of the dispersion plate, and the fluidized bed is oriented in such a direction that at least air is ejected toward the outlet side, so that at least the fluidized medium The air tends to flow from the air outlet position of each dispersion tube along the downward slope of the upper surface of the dispersion plate toward the discharge port, and then ascends and descends, performing a circulating operation. Incidentally, combustion exhaust gas is discharged from the fluidized combustion chamber through a freeboard by an induced fan.

[0011] Accordingly, the waste materials introduced into the fluidized bed are burned, and the incombustible materials successively move down the sloped upper surface of the dispersion plate from the higher level (upstream side) to the lower level (downstream side). In addition, the upper end caps of the dispersion tubes have height differences in sequence according to the inclination of the upper surface of the dispersion plate, and the air jet ports of the air dispersion tubes are arranged between the upper end caps of the air dispersion tubes adjacent to each other in the direction of the inclination of the upper surface. Since the incombustible materials are installed at a height of It is discharged to the outside of the machine from the discharge port together with the medium. As a result, a fluidized bed is smoothly formed and stable fluidized combustion is performed.

Furthermore, if the amount of air blown out from the air dispersion tube of the air dispersion plate is made larger on the discharge port side (downstream side) than on the side opposite to the discharge port (upstream side), the flow rate of the dispersion plate of the fluidized bed is Fluidized circulation convection toward the outlet side along the slope is performed more reliably, waste is mixed more uniformly in the fluidized bed, combustion efficiency is improved, and non-combustibles are also more easily and reliably discharged. If the waste is introduced from the upper surface on the upstream side of the fluidized bed, the waste will be well mixed into the fluidized bed, increasing the residence time and increasing the combustion rate in the fluidized bed.

[0013]

Embodiments Next, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of a fluidized bed incinerator according to the present invention, FIG. 2 is a plan view taken along the line II to II in FIG. 1, FIG. 3 is an enlarged view of section P in FIG. 1, and FIG. FIG. 4 is a plan view of FIG. 3; The fluidized bed incinerator 30 includes an air distribution plate 4 inside the furnace wall 31 made of a refractory material such as castable.
0, a fluidized combustion chamber 70 is located in the upper part, and air chambers 32 and 33 are located in the lower part. Air distribution plate 40
The upper surface 44 facing the fluidized combustion chamber 70 is inclined with a desired slope. A large number of air dispersion pipes 41 are installed vertically through the air dispersion plate 40, and as shown in FIG. (9 in this example), and the columns extending in the vertical direction are arranged in a plurality of rows (7 columns in this example) at equal intervals in the horizontal direction. The air dispersion tubes 41 are arranged in a staggered manner with their phases shifted in the vertical direction. That is, the dispersion tubes in horizontally adjacent columns are arranged at intermediate positions between two dispersion tubes in adjacent columns. Each air distribution tube 41 is fixed to a partition plate 46.

A water cooling pipe 45 is horizontally arranged and fixed to a partition plate 46 between the air dispersion pipes 41 . Air distribution plate 3
Air chambers 32 and 33, which are divided into two by a vertical partition wall 34, are located below 0, and on the side of the air chamber 32, the air chambers 32 communicate with the upper surface 44 of the air distribution plate 30, and the inclined upper surface 44 A discharge port 50 is formed at the lowest position to discharge the fluidized medium 61 and non-combustible materials 63 such as iron scraps out of the furnace. 51 is a discharge port end. A water cooling pipe 45 laid on the air distribution plate 40 is also extended to the vertical wall of the air chamber 32 side of the outlet 50 and is attached with half of its cross section exposed to the outlet 50. 36 and 37 are supply ports that supply high temperature air to the air chambers 32 and 33, respectively.

The structure of the air distribution plate 40 will be explained in more detail with reference to FIGS. 3 and 4. The air distribution plate 40 is provided so that the upper surface 44 of the side facing the fluidized combustion chamber 70 is inclined so that the exhaust port 50 side is at a lower level. Refractories 31a such as castable (unshaped refractories) are installed above and below the partition plate 46, and the partition plate 46, air dispersion pipe 41, cooling pipe 45
The upper surface 44 is formed by the upper end surface of the refractory 31a. Each air dispersion pipe 41 has an air outlet 43.
and an upper end cap 42 are provided to protrude upward from the upper surface 44. The air outlet 43 of the air dispersion pipe 41 and the upper end cap 42 that are adjacent to each other in the direction of inclination of the upper surface 44 are connected to the upper surface 4.
The air outlet 43 of the air dispersion pipe 41 is provided at a height position between the upper end caps 42 of the air dispersion pipes 41 adjacent to each other in the direction of inclination of the upper surface 44. There is. As shown in FIG. 4, the air outlet 43 of each air dispersion pipe 41 directs the air toward the outlet 50 (hereinafter, the outlet side may be referred to as the downstream side, and the side opposite the outlet may be referred to as the upstream side). The two spout ports 43a are oriented in the direction of ejection and are provided at an angle α with respect to the horizontal center line of the dispersion pipe 41, and the angle α with respect to the longitudinal center line of the dispersion pipe 41. It consists of two jet ports 43b provided at positions forming β. For example, the angles α and β are 30 degrees and 20 degrees, respectively.
It is set as degree.

[0016] Air coming out from the jet port 43a (symbol O in the figure)
) is exactly the upper end cap 42 of the adjacent column on the downstream side.
, and is adapted to flow above the upper end cap 42 . Moreover, the air (indicated by the symbol S in the figure) coming out of the jet port 43b flows slightly diagonally upstream from the vertical direction, and flows between the upper end cap 42 adjacent to the dispersion plate 4 in the vertical direction.
The liquid is ejected between the upper surfaces 44 of 0. The upper end cap 42 is attached to the upper end of the dispersion pipe 41 to prevent the fluid medium 61 from flowing into the spout 43, and
It extends horizontally from the upper end position to the upstream side, and its end portion 42a is brought into contact with the inclined upper surface 44 on the upstream side by a desired distance, and the upper surface of the upper end cap 42 is made at the same level as the inclined upper surface 44 at the abutting portion, and The end portion 42a is set to be approximately at a side position of the dispersion pipe 41 on the upstream side. Figure 1
The waste is then introduced into the fluidized bed 60 from above at a position indicated by the symbol R in FIG. In FIG. 1, 70a is a free board above the fluidized bed 60. The fluidizing medium has a particle size of 0.
Sand such as silica sand with a thickness of about 5 to 1.0 mm is used.

Next, the operation of the embodiment of the apparatus of the present invention having such a configuration will be explained. The high-temperature air introduced into the air chambers 32 and 33 is introduced into each air dispersion tube 41 of the air dispersion plate 40, flows out from the air outlet 43 at the upper part of the air dispersion tube 41, and flows into the fluidized combustion chamber 70. The fluidized medium 61 is fluidized to form a fluidized bed 60. This fluidized bed 60 is maintained at a predetermined high temperature. In this case, the upper surface 44 of the air distribution plate 40 on the side facing the fluid combustion chamber 70 is inclined so that the downstream side, which is the discharge port 50 side for the fluid medium and incombustibles, is at a lower level, and the air distribution plate 40 Air outlet 43 of pipe 41
The height difference is made sequentially according to the inclination of the upper surface 44, and two of the air jet ports 43
3a is oriented in such a direction that at least the air is blown out toward the discharge port 50 (indicated by the symbol O in FIG. 1), so the fluidized bed 60 has the symbol Q in FIG. As shown in FIG.
A circulating operation is induced in which the air tends to flow from the position of the air outlet 43a toward the outlet 50 along the downward slope of the upper surface 44 of the dispersion plate, and then rises and descends. On the other hand, the upper surface 4 is
The fluidized medium 61 is mixed and stirred also in the direction intersecting the inclination direction of 4 (slightly oblique upstream direction with respect to the vertical direction), and the stirring action of the fluidized bed 60 is induced. Air is sucked in from the freeboard 70a by an induction fan and discharged from the fluidized combustion chamber 70.

Waste 6 containing incombustible materials 63 is poured into the fluidized bed 60 thus formed from above the upstream side of the upper surface 44 of the air dispersion plate 40 at the position indicated by the symbol R in FIGS. 1 and 2.
4, the waste 64 is a fluid in which the fluid medium circulates toward the downstream side, as shown by the symbol Q, and is mixed and stirred slightly toward the upstream side from the vertical direction. It is uniformly stirred in the bed 60 and burnt efficiently. The combustion exhaust gas is exhausted to the outside of the combustion chamber 70 through the freeboard 70a. Further, the non-combustible material 63 sequentially descends in the fluidized bed 60 from a high position (upstream side) to a low position (downstream side) along the inclined upper surface 44 of the dispersion plate 40 as shown in FIG. In this case, the upper end cap 42 of the dispersion pipe 41 is also attached to the dispersion plate 40.
The air is discharged from the air outlet 43a, which has a height difference sequentially according to the inclination of the upper surface 44, and which is opened particularly toward the downstream side of the air outlet 43 of the air dispersion pipe 41. Since the incombustible material 63 is flowed toward the downstream side at the level between the upper end caps 42 of the air dispersion pipes 41 adjacent to each other in the direction of inclination of the upper surface 44, the incombustible material 63 is prevented from being caught on the upper end cap 42 as much as possible, and the The liquid flows smoothly downward toward the discharge port 50 along the sloped upper surface 44 of the dispersion plate 40, reaches the bottom of the surface 44, and is discharged from the discharge port 50 together with a portion of the fluid medium 61. .

In this embodiment, particularly, the upper end cap 42 extends upstream from the upper end position of the dispersion tube 41, and the upper surface of its end portion 42a is at the same level as the upper surface 44 of the dispersion plate 40 on the upstream side. It is set to be located almost at the side of the dispersion pipe 41 on the upstream side, and the discharge port 50
The air coming out of the outlet 43a directed toward the side (indicated by the symbol O in the figure) is directed toward the upper end cap 42 of the adjacent column and flows above it. The incombustible material 63 is more reliably prevented from being caught on the upper end cap 42 and is more smoothly flowed toward the discharge port 50 along the upper surface of the upper end cap 42 and the inclined upper surface 44 of the dispersion plate 40. Further, air flows from the jet port 43b to the upper surface 4 between the upper end cap 42 and the inclined upper surface 44.
4 (slightly diagonally upstream direction than the vertical direction), air is ejected upward from between the upper end caps 42 adjacent in the column, and the air is ejected upward from between the upper end caps 42 adjacent in the column. The non-combustible materials 63 that are about to be caught are blown upward, and the flow of the non-combustible materials 63 to the downstream side is promoted.

Furthermore, in this embodiment, the amount of air supplied to the air chamber 32 is larger than the amount of air supplied to the air chamber 33, so that the gas distribution plate 40 facing the air chamber 32
The amount of air supplied to the air distribution pipe 41 is smaller than that of the air chamber 33.
The amount of air supplied to the air dispersion pipe 41 of the gas dispersion plate 40 facing the opposite side is made larger. Therefore, since the amount of air blown out from the air dispersion pipes 41 of the air dispersion plate 40 in the portion closer to the downstream side is large, the downstream side of the dispersion plate 40 of the entire fluidized bed 60 in the direction indicated by the symbol Q in FIG. The fluid circulation effect toward the upstream side is stronger, and the incombustible materials 63 are discharged more smoothly and reliably, and the waste materials 64 are introduced from the R position on the upper surface of the upstream side of the fluidized bed 60. The waste 64 is well mixed into the fluidized bed 60 to increase its residence time and increase the combustion rate (efficiency) in the fluidized bed 60. The incombustibles 63 and the fluidized medium 61 discharged from the discharge port 50 to the outside of the furnace through the outlet end 51 are sent to a separator (not shown), where they are separated into the incombustibles 63 and the fluidized medium 61 by the screen. Non-combustible materials left on the screen 6
3 is discharged to the outside of the separator and recovered, and the fluidized medium 61 that has passed through the screen is returned to the fluidized bed 60 of the fluidized combustion chamber 70 by an appropriate transportation means such as a circulating conveyor and is used for circulation.

7 to 10 show different embodiments of the air distribution plate, FIG. 7 is a plan view of only the distribution plate shown corresponding to FIG. 2, and FIG. 8 is a plan view of the distribution plate shown in FIG. 9 is a partially enlarged sectional view of FIG. 8, and FIG. 10 is a plan view of FIG. 9. In this embodiment, the upper surface 84 of the air distribution plate 80
This figure shows a case in which the structure is formed into a step-like shape. The upper surface 84 is formed of a refractory material 80a, and the upper end cap 82 of the air dispersion tube 81 is flush with the upper surface 84 on the upstream side, and the end 8
2a is joined to the upper surface 84 of the stairs on the upstream side. The discharge port 50 is formed adjacent to the lowest position of the stepped upper surface 84. Also in the air dispersion plate 80 formed in this way, the waste 64 is combusted in the fluidized bed 60 that behaves in the same way as in the previous embodiment, and the incombustibles 63 smoothly flow down from the upstream side to the downstream side on each step of the upper surface 84 and on the upper end cap 82, and some Together with the fluid medium 61, it finally falls and is discharged to the discharge port 50.

FIG. 11 shows still another embodiment of the present invention, and is a longitudinal sectional view showing an air distribution plate corresponding to FIG. 1, and FIG. 12 is a plan view of FIG. 11. In this embodiment, the air dispersion plate 90 has a dispersion plate 90a having an inclined upper surface descending to the left in the drawing with the central part of the furnace as its apex, and a dispersion plate 90b having an inclined upper surface descending to the right in the drawing, respectively. Discharge ports 95a and 95b are formed at the lowest positions of the dispersion plates 90a and 90b, respectively, and further discharge ports 95a and 95b are formed at the lowest positions of the distribution plates 90a and 90b.
, a dispersion plate 90c and a dispersion plate 90d are formed on the left and right from the position 95b, respectively. The dispersion plate 90c has the lowest position on the discharge port 95a side, and the dispersion plate 90d has the lowest position on the discharge port 95a side.
b is considered to be the lowest. Each distribution plate 90a~
d is the air dispersion pipe 91 (
(indicated by vertical lines in the drawings), the air outlet, its opening direction, and the attachment relationship of the upper end cap, etc., are formed in the same manner as in the previous embodiment.

An air chamber 92 is located at the lowest part of the furnace, and upper air is separated by vertical walls through a horizontal partition plate 94 having a large number of slits 94a between it and a dispersion plate 90. Chambers 93a-f are formed. 96, 97
are from the air chamber 92 to the upper air chamber 9 at the left end and right end, respectively.
This is an air supply passage leading to 3f and 93d. Discharge ports 95a and 9 of central mountain-shaped dispersion plates 90a and 90b, respectively.
Horizontal partition plate 9 facing upper air chambers 93e and 93c on the 5b side
The number of slits 94a in No. 4 is the upper air chamber 93 near the center.
The number of slits 94a is greater than the number of slits 94a in the horizontal partition plate 94 facing the sides a and 93b, and the dispersion plate 9 on the side of the discharge ports 95a and 95b is
The amount of air discharged into the fluidized combustion chamber from the dispersion pipes 91 of 0a and 90b is increased. Waste is input from the positions (three locations) indicated by R in the figure.

With this configuration, the fluidizing medium is directed toward the left and right discharge ports 95a and 95b by the air flowing in the direction indicated by the symbol O in the figure from each of the air distribution plates 90a to 90d. Flow takes place. Due to the fluidized beds merging near the discharge ports 95a and 95b, and due to the large amount of air being blown out from the distribution plates on the discharge ports 95a and 95b side among the distribution plates 90a and 90b located in the center, The fluidized bed has a stronger circulation effect, and the waste is well mixed therein, increasing the combustion efficiency, and the incombustibles are smoothly discharged into the discharge ports 95a and 95b.

[0025]

Effects of the Invention As explained above, in the fluidized bed combustion apparatus for waste of the present invention, incombustible substances contained in the waste can be smoothly discharged outside the machine. can be performed stably. In addition, if the amount of air blown out from the air dispersion tube of the air distribution plate is made larger on the discharge port side than on the side opposite to the discharge port, the amount of air ejected from the air distribution pipe of the air distribution plate can be made to be larger on the discharge port side (downstream side) along the slope of the distribution plate of the fluidized bed. The fluid circulation convection can be performed more reliably, the incombustibles can be discharged more smoothly and reliably, and the combustion efficiency of the waste can be further improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of a fluidized bed incinerator of the present invention.

FIG. 2 is a plan view taken along the line II-II in FIG. 1;

FIG. 3 is an enlarged view of section P in FIG. 1;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a vertical cross-sectional view showing a schematic configuration of a conventional fluidized bed incinerator.

FIG. 6 is a longitudinal sectional view showing a different example of a conventional air distribution plate.

FIG. 7 is a plan view of an air distribution plate showing another embodiment of the present invention.

FIG. 8 is a sectional view taken along the line VIII to VIII in FIG. 7;

FIG. 9 is a partially enlarged sectional view of FIG. 8;

FIG. 10 is a plan view of FIG. 9;

FIG. 11 is a longitudinal sectional view showing still another embodiment of an air distribution plate of the present invention.

FIG. 12 is a plan view of FIG. 11;

[Explanation of symbols]

30 Fluidized bed incinerator 40, 80, 90 Air distribution plate 41, 81, 91 Air dispersion tube 42, 83 Top end cap 43, 83 Air outlet 44, 84 Top surface of air distribution plate 50, 95 Discharge port 60 Fluidized bed 61 Fluid medium 63 Nonflammable materials 64 Waste 70 Fluid combustion chamber

Claims (2)

[Claims] Claim 1: In a fluidized bed combustion apparatus for waste, which extracts a fluidized medium and non-combustibles from a discharge port to the outside of the machine, removes the noncombustibles outside the machine, and then returns the fluidized medium to the fluidized combustion chamber again. , the air dispersion plate of the fluidized combustion chamber is provided so that the upper surface of the side facing the combustion chamber is inclined such that the discharge port side is at a lower level, and the air dispersion tube is attached to the air dispersion plate on the upper surface of the air dispersion plate. A large number of air jet ports and upper end caps are provided to protrude from the air dispersion tube, and the air jet ports and upper end caps of the air dispersion tubes adjacent to each other in the direction of inclination of the upper surface have height differences in sequence according to the inclination of the upper surface, The air outlet of the air dispersion tube is provided at a height between the upper end caps of the air dispersion tubes adjacent to each other in the direction of inclination of the upper surface, and the air outlet of each air dispersion tube is such that at least air is directed toward the outlet side. 1. A fluidized bed combustion apparatus for waste, characterized in that the waste is oriented in a direction such that the waste is ejected. 2. The fluidized bed combustion apparatus for waste according to claim 1, wherein the amount of air ejected from the air dispersion pipe of the air dispersion plate is larger on the side of the discharge port than on the side opposite the discharge port.