JPH11309364A - Method and apparatus for discharging grain out of fluidized bed apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently discharge large agglomerates out of a fluidized-bed apparatus which is used for treating (cooling, drying, heating, sorting, or treating in combination of these treatment) a granular material containing large agglomerates. SOLUTION: This fluidized-bed apparatus comprises wind boxes 32, 34 in a lower part of the inside of a main body 48 and a fluidized-bed 12 formed above the wind boxes through a gas dispersion plate 10. The main body has an object material change inlet 28 in one end for introducing granules containing large agglomerates, a treated material discharging outlet 14 formed in the other end, and gas discharging outlets 36, 38 for discharging a waste gas containing fine powder in the upper part and the treated material discharging outlet 14 is connected with a treated material discharging chute 16. In this case, the treated material discharging chute 16 is so divided by a partitioning wall 50 as to form a large agglomerate discharging chute 44 in the gas dispersing plate side and a grain discharging chute 46 in the main body end part side and a fluidizing gas jetting nozzle 42 is installed in a side part of the large agglomerate discharging chute 44 to make it easy to introduce and drop granules in the upper part of the large agglomerate discharging chute 44 to the inside of the large agglomerate discharging chute by fluidizing the grains.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fluidized bed apparatus for treating (cooling, drying, heating, classifying or the like or a combination thereof) slag, coal, and other particulates including large lumps, and efficiently processes the large lumps. The present invention relates to a method and apparatus for discharging particles that can be discharged.

[0002]

2. Description of the Related Art Conventionally, in a fluidized bed cooler for cooling granular materials containing large lumps, for example, slag, since large lumps generated in the previous process are contained in slag, large lumps are formed in the fluidized bed. It remains at the bottom and causes fluidization abnormalities. For this reason, it is necessary to remove large lump. However, since the slag to be charged is at a high temperature (for example, about 1000 ° C.), it is difficult to perform a pretreatment such as sieving from the viewpoint of heat resistance. A method is needed. On the other hand, for processed products,
Eventually, it is necessary to remove large lumps and equalize the particle size, but when processing very hard slag with a large amount of sieve etc., there is a problem that maintenance cost is required because the sieve is severely worn. .

FIGS. 6 and 7 show an example of a conventional fluidized bed apparatus. An object to be processed consisting of particles including large lumps is charged onto the gas dispersion plate 10, and a gas is introduced from the lower side of the gas dispersion plate 10 to fluidize the particles, thereby forming a fluidized bed 12, whereby a fluidized bed 12 is formed. The object is processed (cooling, drying,
(Heating, classification, or a combination thereof), and the particles are extracted as products from a processed material discharge unit 14 provided near the end of the fluidized bed through a processed material discharge chute 16. 18
Is a moving layer of particles, and 20 is a partition member. 6 and 7
When slag is used as an object to be treated and cold air (normal temperature air) is used as a gas, a slag fluidized bed cooler is configured. The apparatus shown in FIGS. 6 and 7 is a two-chamber fluidized bed apparatus, but a one-chamber fluidized bed apparatus without a partition member is well known in the art.

Japanese Patent Application Laid-Open No. Hei 6-281110 discloses a fluidized bed having a structure in which a concave portion is provided at the bottom of a dispersion plate of a fluidized bed furnace, and the upper end of a large lump discharge chute penetrating a wind box is inserted into the concave portion. Is disclosed.

[0005]

In the fluidized bed apparatus shown in FIGS. 6 and 7, since the inside and the upper part of the processing object discharge chute 16 become the moving bed 18, the large mass 22 is taken into the moving bed 18. It is difficult to accumulate on the gas dispersion plate in front of the processing object discharge chute 16. And, with the passage of time, large lump 2
The deposition of 2 reaches the entire surface of the gas dispersion plate 10 and deteriorates fluidization of the fluidized bed itself. Further, the structure described in JP-A-6-281110 in which a large lump is discharged through a dispersion plate and a wind box has a complicated structure. Incidentally, Japanese Patent Application Laid-Open
Even with the device described in Japanese Patent No. 281110, it is not possible to discharge nearly 100% of large lumps, and eventually large lumps accumulate over time, and the fluidization of the fluidized bed itself becomes poor.

The present invention has been made in view of the above points, and an object of the present invention is to provide a partition wall for dividing the inside of a processed material discharge chute into a large lump discharge chute and a normal particle discharge chute, or A large lump discharge chute is provided adjacent to the upstream side of the discharge chute, and a gas injection nozzle is provided in the large lump discharge chute to fluidize an upper portion of the chute so that the large lump can easily enter the chute. Accordingly, it is an object of the present invention to provide a method and an apparatus for discharging particles from a fluidized bed apparatus, which can efficiently discharge large lumps. Further, an object of the present invention is that, in addition to the above-described configuration, at least a part of the partition wall has a sieve structure such as a grizzly structure or a wire mesh structure, so that small-diameter particles that have penetrated into the large lump discharge chute are directed toward the normal particle discharge chute. It is an object of the present invention to provide a method and an apparatus for discharging particles from a fluidized bed apparatus, in which only large lumps can be selectively discharged by being returned by bypass.

[0007]

In order to achieve the above-mentioned object, a method for discharging particles from a fluidized bed apparatus according to the present invention is characterized in that an object to be treated consisting of particles including large lumps is charged onto a gas dispersion plate. By introducing a gas from the lower side of the gas dispersion plate and fluidizing the particles to form a fluidized bed, the object to be treated is processed, and a treated material discharge chute is provided from a treated material discharge portion provided near the end of the fluidized bed. In the method of extracting the particles through the above, a large lump discharge section is provided adjacent to the gas dispersion plate side of the processed material discharge section, and a large lump discharge chute is connected to the large lump discharge section, and the large lump discharge chute side is provided. Injects fluidizing gas from the part to fluidize the upper particles in the large lump discharge chute,
The large lump is configured to enter and fall into the large lump discharge chute (see FIGS. 1 to 5).

[0008] In this method, the large-volume discharge chute in the upper portion of the large-volume discharge chute is 1 to 3 times, preferably 1.5 to 2 times the fluidization start speed Umf in the fluidized bed. The fluidizing gas is injected from the side of the chute. If Umf is less than the above range, large lumps are difficult to move, while if Umf exceeds the above range, particles in the chute and the fluidized bed are too violently mixed, and large lumps are selectively discharged. Becomes difficult.

The apparatus for discharging particles from a fluidized bed apparatus according to the present invention has a wind box at the lower part in the main body, forms a fluidized bed above the wind box via a gas dispersion plate, and has a large end at one end of the main body. A processing object discharge port for introducing particles including lumps, a processing material discharge section at the other end of the main body, and a gas discharge port for extracting exhaust gas containing fine powder at an upper part of the main body, In the fluidized-bed apparatus connected to the processing object discharge chute, the inside of the processing object discharge chute is divided by a partition wall so that a large lump discharge chute is formed on the gas dispersion plate side and a particle discharge chute is formed on the main body end side. And, a fluidizing gas injection nozzle is provided on the side of the large chute discharge chute to fluidize the particles in the upper part of the large chute discharge chute so that the large chunk can easily enter and fall into the large chunk discharge chute. (See FIGS. 1 to 3).

Further, the apparatus of the present invention has a wind box in the lower part of the main body, forms a fluidized bed on the upper side of the wind box through a gas dispersion plate, and at one end of the main body, puts particles containing large lumps. It has a workpiece inlet for introduction, a workpiece outlet at the other end of the main body, and a gas outlet at the top of the body for extracting exhaust gas containing fine powder, and a workpiece discharge chute at the workpiece outlet. In the fluidized-bed apparatus to which is connected, a large lump discharge section is provided adjacent to the gas dispersion plate side of the processed material discharge section, and a large lump discharge chute is connected to the large lump discharge section, and the large lump discharge chute side is connected. A fluidizing gas injection nozzle is provided in the portion to fluidize the particles in the upper portion of the large chute and make the large chunk easily enter and fall into the large chute (see FIG. 4). ).

Further, the apparatus of the present invention has a wind box in the lower part of the main body, forms a fluidized bed on the upper side of the wind box through a gas dispersion plate, and at one end of the main body, contains particles containing large lumps. A workpiece inlet for introduction, a workpiece discharge section at the other end of the main body,
In the fluidized bed apparatus having a gas discharge port for extracting exhaust gas containing fine powder at the upper part of the main body, and a process discharge chute connected to the process discharge portion, the inside of the process discharge chute is
The large chute discharge chute is divided on the gas dispersion plate side by the partition wall so that the particle discharge chute is formed at the end of the main body, and the particles in the upper part of the chunk discharge chute flow to the side of the chunk discharge chute. A fluidizing gas injection nozzle is provided to make the large lump easily enter and fall into the large lump discharge chute, and the lower part of the large lump discharge chute is inclined. At least a part of the sieve structure,
A partition wall for space formation is provided in the processed material discharge chute so as to form a space below this sieve structure, and small-diameter particles that have penetrated into the large lump discharge chute fall into the space and are discharged to the processed material discharge chute. It is characterized in that it is configured to return by bypass (see FIG. 5). In these devices, it is preferable that the upper end of the partition wall be higher than the upper surface of the gas distribution plate. For example, when slag is cooled, the slag product (coarse grain) generally has a particle size of 2 to 3 mm and the large lumps have a particle size of 80 to 100 mm, so that the large lumps do not enter the particle discharge chute. Thus, the upper end of the partition wall is set to be higher than the upper surface of the gas distribution plate by about 100 to 200 mm.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described for a case where a fluidized bed apparatus is a two-chamber type fluidized bed apparatus, but the present invention is not limited to a two-chamber type. 1
A chamber type (without partitions) can be applied to a fluidized bed apparatus having three or more chambers. FIG. 1 shows an apparatus for discharging particles from a fluidized bed apparatus according to a first embodiment of the present invention, and FIG.
FIG. 3 shows details around the treated material discharge unit in FIG.
2 shows a plane cross section around the processed material discharge part in FIG. As shown in FIGS. 1 to 3, two chambers 24 each including a fluidized bed 12 are formed by a vertical partition member 20 (for example, a partition wall).
26. On the upstream side of the fluidized bed 12 in the upstream chamber, there is provided a treatment object inlet 28 for introducing particles including large lumps, and the fluidized bed 12 in the downstream chamber 26 is provided.
On the downstream side of the processing object, there is provided a processing object discharge section (processing substance discharge port) 14. On the lower side of the partition member 20, the gas distribution plate 1
A passage 30 is formed between the passage 30 and the first passage. Each room 24, 26
On the lower side, wind boxes 32 and 34 are provided.
Gas outlets 36 and 38 for extracting exhaust gas containing fine powder are provided at the upper part of the processing object, and the processing object discharge chute 16 is connected to the processing object discharge section 14. As the gas dispersion plate 10, a perforated plate type dispersion plate, a cap type dispersion plate, or the like is used. The gas supplied to the wind box is cold air,
Heated air, combustion exhaust gas, inert gas such as N ₂ gas and the like are appropriately selected and used according to the processing purpose.

In the fluidized bed apparatus constructed as described above, as shown in FIGS.
The inside is divided by a partition wall 50 such that a large chute discharge chute 44 is formed on the gas dispersion plate 10 side and a particle discharge chute 46 is formed on an end side of the apparatus main body 48. That is, the partition wall 50
Is provided almost to the lower end of the discharge. Reference numeral 52 denotes a large lump discharge section (large lump discharge port). The fluidizing gas injection nozzle 42 is provided on the side of the large lump discharge chute 44. The large chute discharge chute 44 is provided with a large chunk discharge device 54, and the particle discharge chute 46 is provided with a particle discharge device 56. As the dischargers 54 and 56, a discharger that opens and closes using a gate damper, a rotary feeder, and a cam mechanism, a discharger that opens and closes using a balance of weights, and the like are used.

Next, the operation of the apparatus for discharging particles from the fluidized bed apparatus shown in FIGS. 1 to 3 will be described. An object to be treated consisting of particles including large lumps is charged onto the gas dispersion plate 12 from the object to be treated inlet 28, and a gas is ejected from the gas dispersion plate 12 to fluidize the particles to form the fluidized bed 12. The processing target is processed (cooling, drying, heating, classification, or a combination thereof), and the processing target (particles) is discharged to the processing target discharge unit 14.
From the product through a particle discharge chute 46 as a product. Exhaust gas containing fine powder discharged from the gas discharge ports 36 and 38 is introduced into a dust collector such as a cyclone and / or a bag filter, and the fine powder is collected and separated. The fluidizing gas is injected from the fluidizing gas injection nozzle 42 on the side of the large chute discharge chute 44 to fluidize the particles in the upper part of the large chute discharge chute 44 and the large chunk enters the large chute discharge chute 44.・ Drop it. As the fluidizing gas, an inert gas such as cold air, heated air, flue gas, or N ₂ gas is used.
The fluidizing gas velocity in the upper part of the large chute discharge chute 44 is 1 to 3 of the fluidization start velocity Umf in the fluidized bed 12.
The fluidizing gas is injected from the fluidizing gas injection nozzle 42 so that the fluidizing gas is doubled, preferably 1.5 to 2 times.

FIG. 4 shows a main part of a device for discharging particles from a fluidized bed apparatus according to a second embodiment of the present invention. In the present embodiment, a large lump discharge portion (large lump discharge port) 52a is provided adjacent to the gas discharge plate 10 side of the processed material discharge portion 14 without dividing the processed material discharge chute 16 by a partition wall. The large chute discharge chute 44a
Are connected. Other configurations and operations are the same as those in the first embodiment.

FIG. 5 shows a main part of a device for discharging particles from a fluidized bed apparatus according to a third embodiment of the present invention. In the present embodiment, the lower portion of the large lump discharge chute 44, for example, the lower side of the fluidizing gas injection nozzle 42 is inclined, and the inclined portion 58
A part or the whole of the partition wall on the particle discharge chute side is a sieve structure part 60, and in the processed material discharge chute 16,
A space forming partition wall 64 is provided below the sieve structure section 60 so that a space section 62 is formed, and small-diameter particles that have penetrated into the large-lumb discharge chute 44 are removed by the sieve structure section 60.
, And is dropped into the space 62 and is returned to the processing object discharge chute 16, more specifically, the particle discharge chute 46 by bypass. As the sieve structure section 60, a configuration in which a large number of grizzly bars are provided, a configuration in which a wire mesh is attached, and the like are employed. This embodiment has the advantage that only large lumps can be selectively discharged. Other configurations and operations are the same as those in the first embodiment.

[0017]

As described above, the present invention has the following effects. (1) Compared with the conventional method that discharges a large lump by passing through a gas distribution plate and a wind box, the structure is simpler, and a large lump discharge chute does not pass through a wind box. However, it is extremely safe because it is not exposed to hot gas for a long time. (2) Since the large lumps charged into the fluidized bed finally gather near the discharge end, large lumps can be efficiently discharged. (3) In the case where there is a demand for uniformity of the product grain size, the treatment has conventionally been performed with a sieve, but there have been problems of heat resistance and abrasion. However, by applying the method and apparatus of the present invention, a sieve is not required, and the above problems can be solved at the same time. (4) When a sieve structure such as grizzly or wire mesh is provided below the large chute discharge chute, the normal particles that have flowed together with the large chunk into the large chute discharge chute are returned to the particle discharge chute side.
Only large lumps can be selectively discharged.

[Brief description of the drawings]

FIG. 1 is a schematic sectional configuration diagram showing a device for discharging particles from a fluidized bed device according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional explanatory view showing a main part of the particle discharge device according to the first embodiment of the present invention, showing details around a processed material discharge portion in FIG. 1;

FIG. 3 is an explanatory plan view of a section around a processed material discharge section in FIG. 1;

FIG. 4 is an explanatory plan view showing a main part of a device for discharging particles from a fluidized bed device according to a second embodiment of the present invention.

FIG. 5 is an enlarged sectional explanatory view showing a main part of a device for discharging particles from a fluidized bed device according to a third embodiment of the present invention.

FIG. 6 is a schematic sectional view showing an example of a conventional fluidized bed apparatus.

FIG. 7 is an enlarged cross-sectional explanatory view showing details around a processed material discharge unit in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Gas dispersion plate 12 Fluidized bed 14 Processed material discharge part 16 Processed material discharge chute 18 Moving layer 20 Partition member 22 Large block 24 Upstream room 26 Downstream room 28 Workpiece input port 30 Passage 32, 34 Wind box 36 , 38 Gas outlet 42 Fluidizing gas injection nozzle 44, 44a Large lump discharge chute 46 Particle discharge chute 48 Main unit 50 Partition wall 52, 52a Large lump discharge section 54 Large lump discharger 56 Particle discharger 58 Inclined section 60 Sieve Structure part 62 Space part 64 Partition wall for space formation

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[Procedure amendment]

[Submission date] July 5, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

To achieve the above object, according to the Invention The particles discharged method from the fluidized bed apparatus of the present invention, the flow
By placing the material to be treated consisting of particles containing large lumps that cause abnormal gasification on the gas dispersion plate and introducing a gas from the lower side of the gas dispersion plate to fluidize the particles and form a fluidized bed In the method of processing the object to be processed and extracting the particles from the processed material discharge portion provided near the end of the fluidized bed through the processed material discharge chute, a large lump is adjacent to the gas discharge plate side of the processed material discharge portion. provided with a discharge portion, the connecting large lumps Daikatamari discharge chute to the discharge unit, the large lump discharge chute in an upper portion of the particles are fluidized crowded Spray the fluidizing gas from the side of the large lump discharge chute, the discharge end Flow gathered near
The large lumps which cause the formation abnormality are made to enter and fall into the large lumps discharge chute (see FIGS. 1 to 5).

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009] particle discharging device from the fluidized bed apparatus of the present invention has a wind box in the lower part of the body, this above the windbox through the gas distribution plate to form a fluidized bed, flow into one end of the body Change
A workpiece inlet for introducing particles containing large lumps, which causes normal operation, a processed material outlet at the other end of the main body, and a gas outlet for extracting exhaust gas containing fine powder at the top of the main body. In the fluidized bed apparatus in which the processed material discharge chute is connected to the processed material discharge portion, a large lump discharge chute is formed in the processed material discharge chute on the gas dispersion plate side and a particle discharge chute is formed on the main body end portion side. The upper part of the chunk discharge chute is fluidized on the side of the chunk discharge chute and the fluidization abnormalities gather near the discharge end.
Is characterized in that a fluidizing gas噴込nozzle for large mass becomes a factor likely to enter or dropping into Daikatamari discharge chute (see FIGS. 1 to 3).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

Further, the apparatus of the present invention has a wind box in the lower part of the main body, forms a fluidized bed above the wind box via a gas dispersion plate, and causes a fluidization abnormality at one end of the main body. and an object to be processed inlet for introducing particles comprising becomes <br/> Daikatamari, the treated product discharge section at the other end of the body, a gas outlet for withdrawing gas containing fines to the top of the body In a fluidized bed apparatus in which a processed material discharge chute is connected to a processed material discharge portion, a large mass discharge portion is provided adjacent to a gas dispersion plate side of the processed material discharge portion, and a large mass is formed in the large mass discharge portion. Connect the discharge chute, fluidize the particles in the upper part of the mass chute on the side of the mass chute and collect the flow near the discharge end.
A fluidizing gas injection nozzle is provided to make it easy for large lumps that cause abnormal activation to enter and fall into the large lump discharge chute (see FIG. 4).

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

Further, the apparatus of the present invention has a wind box at the lower portion in the main body, forms a fluidized bed above the wind box via a gas dispersion plate, and causes a fluidization abnormality at one end of the main body. Tona
That the object to be treated inlet for introducing particles comprising Daikatamari,
In a fluidized-bed apparatus having a processed material discharge section at the other end of the main body, a gas discharge port at an upper portion of the main body for extracting exhaust gas containing fine powder, and a processed material discharge chute connected to the processed material discharge section, The inside of the discharge chute is divided by a partition wall so that a large lump discharge chute is formed on the gas dispersion plate side and a particle discharge chute is formed on the body end side, and on the side of the large lump discharge chute,
Fluidize the upper particles in the large chute discharge chute and attach the discharge end
A fluidizing gas injection nozzle is provided to make it easier for large lumps that may cause fluidization anomalies to enter and fall into the lump discharge chute, and the lower part of the lump discharge chute is inclined. At least a part of the partition wall on the particle discharge chute side of the portion has a sieve structure, and a space forming partition wall is provided in the processed material discharge chute so as to form a space below the sieve structure; It is characterized in that the small-diameter particles that have penetrated into the inside are dropped into the space and are returned to the processing object discharge chute by bypass (see FIG. 5). In these devices, it is preferable that the upper end of the partition wall be higher than the upper surface of the gas distribution plate. For example, when slag is cooled, the slag product (coarse grains) generally has a particle size of 2 to 3 mm and the large lumps have a particle size of 80 to 100 mm, so that the large lumps do not enter the particle discharge chute. Thus, the upper end of the partition wall is set to be higher than the upper surface of the gas distribution plate by about 100 to 200 mm.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

[0017]

As described above, the present invention has the following effects. (1) Compared with the conventional method that discharges a large lump by passing through a gas distribution plate and a wind box, the structure is simpler, and a large lump discharge chute does not pass through a wind box. However, it is extremely safe because it is not exposed to hot gas for a long time. (2) Since the large lumps charged into the fluidized bed finally gather near the discharge end, large lumps can be efficiently discharged. In addition, by discharging large lumps, large lumps are deposited on the gas distribution plate.
Prevents accumulation of lumps and abnormal fluidization due to accumulation of large lumps
Can be stopped. (3) In the case where there is a demand for uniformity of the product grain size, the treatment has conventionally been performed with a sieve, but there have been problems of heat resistance and abrasion. However, by applying the method and apparatus of the present invention, a sieve is not required, and the above problems can be solved at the same time. (4) When a sieve structure such as grizzly or wire mesh is provided below the large chute discharge chute, the normal particles that have flowed together with the large chunk into the large chute discharge chute are returned to the particle discharge chute side.
Only large lumps can be selectively discharged.

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Claims (6)

[Claims] An object to be treated comprising particles including large lumps is charged onto a gas dispersion plate, and a gas is introduced from the lower side of the gas dispersion plate to fluidize the particles to form a fluidized bed. A method of processing a processed material and extracting particles through a processed material discharge chute from a processed material discharge portion provided near an end of a fluidized bed, comprising: a large lump discharge portion adjacent to a gas dispersion plate side of the processed material discharge portion; The mass discharge chute is connected to the mass discharge chute, and fluidizing gas is injected from the side of the mass discharge chute to fluidize the particles in the upper portion of the mass discharge chute, thereby increasing the mass. A method for discharging particles from a fluidized bed apparatus, wherein the particles enter and fall into a lump discharge chute. 2. A method for injecting a fluidizing gas from a side portion of a mass discharge chute such that a fluidizing gas velocity in an upper portion of the mass discharge chute is 1 to 3 times a fluidization start speed in the fluidized bed. Item 10. A method for discharging particles from a fluidized bed apparatus according to Item 1. 3. A process for forming a fluidized bed through a gas dispersion plate above a wind box at a lower portion in the main body and introducing particles containing large lumps into one end of the main body. Object inlet,
In a fluidized bed apparatus having a treated material discharge section at the other end of the main body and a gas discharge port at an upper portion of the main body for extracting exhaust gas containing fine powder, and a treated substance discharge chute connected to the treated substance discharge section, The inside of the discharge chute is divided by a partition wall so that a large discharge chute is formed on the gas dispersion plate side and a particle discharge chute is formed on the end portion of the main body. An apparatus for discharging particles from a fluidized bed apparatus, further comprising a fluidizing gas injection nozzle for fluidizing upper particles and making a large lump easily enter and drop into a large lump discharge chute. 4. A process for forming a fluidized bed through a gas dispersion plate above a wind box at a lower portion in the main body, and for introducing particles containing large lumps into one end of the main body. Object inlet,
In a fluidized bed apparatus having a treated material discharge section at the other end of the main body and a gas discharge port at an upper portion of the main body for extracting exhaust gas containing fine powder, and a treated substance discharge chute connected to the treated substance discharge section, A mass discharge portion is provided adjacent to the gas dispersion plate side of the discharge portion, and a mass discharge chute is connected to the mass discharge portion. A fluidized gas injection nozzle for fluidizing the large mass and making the large mass easily enter and drop into the large mass discharge chute. 5. A process for forming a fluidized bed through a gas dispersion plate above a wind box at a lower portion in the main body, and for introducing particles containing large lumps into one end of the main body. Object inlet,
In a fluidized bed apparatus having a treated material discharge section at the other end of the main body and a gas discharge port at an upper portion of the main body for extracting exhaust gas containing fine powder, and a treated substance discharge chute connected to the treated substance discharge section, The inside of the discharge chute is divided by a partition wall so that a large discharge chute is formed on the gas dispersion plate side and a particle discharge chute is formed on the end portion of the main body. A fluidizing gas injection nozzle is provided to fluidize the upper particles and make it easier for the mass to enter and drop into the mass discharge chute. The lower portion of the mass discharge chute is tilted. At least a part of the side partition wall has a sieve structure, and a space forming partition wall is provided in the processed material discharge chute so as to form a space below the sieve structure, and a small diameter penetrated into the large lump discharge chute. particle Discharging the particles from the fluidized bed apparatus into the space portion and bypassing and returning to the processing object discharge chute. 6. The apparatus for discharging particles from a fluidized bed apparatus according to claim 3, wherein the upper end of the partition wall is higher than the upper surface of the gas dispersion plate.