JP2595072Y2 - Perforated plate unit in fluidized bed processing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

[Purpose of the invention]

[Industrial application] The present invention is intended for
The present invention relates to a fluidized bed processing apparatus for performing processes such as granulation and coating, and more particularly to a perforated plate unit provided between a fluidized chamber and a fluidized air blowing chamber.

[0002]

BACKGROUND OF THE INVENTION Fluidized bed treatment apparatuses are widely used as apparatuses for drying, granulating and coating powders and the like.
In this apparatus, a fluidizing chamber and a fluidizing air blowing chamber are separated by a perforated plate unit having a plurality of blowout holes, and a process is performed while flowing an object to be processed in the fluidizing chamber by fluidizing wind supplied from the fluidizing air blowing chamber. Is what you do. Further, as a specific example of this type of apparatus, a medium sphere is put into a fluidized chamber, and the medium sphere and the workpiece are caused to flow together by hot air supplied from a flowing air blowing chamber, thereby drying the workpiece. There is a fluidized bed drying device to perform.

However, such a fluidized bed processing apparatus has the following problems. That is, in the case of supplying high-temperature hot air from the fluidized-air blowing chamber 4 'like the fluidized-bed drying apparatus, the temperature near the perforated plate unit 3' becomes extremely high as shown in FIG. A seal material with good elasticity and excellent sealability cannot be used for the seal portion S 'at the end of the perforated plate unit 3', and a non-asbestos-based seal material with poor elasticity must be used in order to emphasize heat resistance. I didn't get it. Therefore, in order to maintain the sealing performance, a structure that cannot be easily disassembled by the device itself is adopted, and as a result, maintenance is difficult.

[0004] In the fluidized bed drying apparatus using the above-mentioned medium spheres, the processing residue and the medium spheres in the fluidized bed are discharged from a discharge gate formed on the side wall of the fluidized bed main body 2 'as shown in FIG. 13 ', but it is difficult to remove the take-out gate 13' by catching the medium ball A 'at the time of discharge,
When the take-out gate 13 ′ is opened, medium balls and the like are scattered, and further, when scraping out from the take-out gate 13 ′,
There were various problems, such as a medium ball or the like being caught on the step of the take-out gate 13 ', making it difficult to scrape out.

[0005]

[Technical matters attempted to be developed] The present invention has been made in view of such a background, and even in a fluidized bed processing apparatus requiring high temperature treatment, a boundary between a fluidized chamber and a fluidized air blowing chamber is required. By reducing the influence of heat on the peripheral part, it is possible to use a sealing material with good elasticity to seal that part,
The device can be easily disassembled without worrying about the integrity of the seal at the time of assembly, thereby improving sanitary properties, and also facilitating the discharge of residual products, medium balls, and cleaning the inside of the layer. An attempt was made to develop a perforated plate unit in the fluidized bed processing apparatus described above.

[0006]

[Structure of the device]

The perforated plate unit in the fluidized bed treatment apparatus according to the first invention according to the present invention has a fluidized bed main body which is partitioned by a perforated plate unit having a plurality of blowout holes into a fluid chamber at an upper portion thereof. In a device in which a fluidized-air blowing chamber is formed at a lower portion and supplies fluidized air to the fluidized-chamber side from the fluidized-air blowing chamber through an outlet, and performs a fluidized process on the object to be processed in the fluidized chamber, the perforated plate unit includes: wherein the bottom surface having a blowout hole, the side surface is formed to be substantially fitted into the inner fluidized bed body, the upper is the upper end open Ri formed is formed a flange involved in the seal portion outwardly, and With the object to be treated
The media spheres or the remnants of the process that flow together
It has a container shape with a depth dimension that can be stored with
After the flow treatment, the perforated plate unit is removed and the medium is removed.
It is characterized in that balls or unprocessed products can be transferred .

The perforated plate unit in the fluidized bed processing apparatus according to the second invention of the present application is characterized in that a handle is provided on the flange in addition to the above requirements. The purpose of the invention is to achieve the above object.

[0008]

In the present invention, the perforated plate unit is formed in a container shape, and a flange is formed outside the upper end of the perforated plate unit, so that the hot air from the flowing air supply chamber is blocked by the bottom surface of the perforated plate unit. Do not hit the part directly. Further, the temperature of the fluidized chamber in which moisture and the like are evaporated is considerably lower than that of the fluidized-air blowing chamber. Therefore, the seal located on the flow chamber side is heated by heat conduction, but does not become so high in temperature. Therefore, a sealing material having low heat resistance but good elasticity and excellent sealing properties can be used. This also ensures the integrity of the seal,
It is possible to easily disassemble the fluidized bed main body without worrying about the sealing property at the time of assembly.

Further, since the depth dimension of the perforated plate unit is set so as to be able to store the unprocessed product and the medium balls in a non-flow state, even if the fluidized bed body is disassembled when collecting the unprocessed product and the like,
The residual product and the medium sphere are stored in the perforated plate unit and are not scattered.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the illustrated embodiment. Reference numeral 1 denotes a fluidized bed drying apparatus as an example of a fluidized bed processing apparatus to which the present invention is applied. The fluidized bed drying apparatus includes a substantially cylindrical fluidized bed main body 2 having a slightly enlarged top and a closed top and bottom. It is the main component. The inside of the fluidized bed main body 2 is partitioned by a perforated plate unit 3, a fluidized air blowing chamber 4 is formed below the fluidized bed main body 2, a fluidized chamber 5 is formed above the fluidized air blowing chamber 4, and an exhaust chamber 5 a is further formed above the fluidized air blowing chamber 5. Consisting of

There are several types of this type of fluidized bed drying apparatus. The apparatus of the present embodiment includes a plurality of media having a larger diameter than the outlet of the perforated plate unit 3 in the fluidized chamber 5. The raw material is sprayed or dropped while the spheres A are inserted and the medium spheres A are fluidized by the hot air blown up from below, and the raw materials are dispersed by heat conduction from the heated medium spheres A and convective heat transfer from the fluidized hot air. It is to be dried.

The fluidized bed main body 2 includes an upper layer 6 constituting an upper enlarged portion, an intermediate layer 7 located between the upper layer 6 and the perforated plate unit 3, and a lower portion disposed below the perforated plate unit 3. And a lower layer 8 which can be disassembled. In an assembled state, a sealing portion is provided between the perforated plate unit 3 and the intermediate layer 7 and between the perforated plate unit 3 and the lower layer 8 respectively. S is provided so that ventilation between the inside and the outside of the layer is reliably blocked.

The lower layer 8 has a hot air inlet 9 and the upper layer 6 has a hot air outlet 10.
In the fluidized bed, hot air inlet 9 → fluidized air blowing chamber 4 → fluidized chamber 5
→ A hot air flow path is formed in the order of the hot air discharge ports 10. Also, inside the intermediate layer 7, the raw material supply pipe 11 extends to the center,
A nozzle 12 for supplying the raw material into the flow chamber 5 is provided downward at the tip. Further, on the side surface of the intermediate layer 7,
An observation window 13 for observing the internal state during operation is provided, and an inspection port 14 for a dropped product or the like is also provided in the lower layer 8.

Next, the perforated plate unit 3 having the characteristic structure of the present invention and the seal portion S will be described in connection therewith. First, the perforated plate unit 3 has a container shape as shown in FIG. 3, and has a blowout surface 16 having a plurality of blowout holes 15 formed at a bottom portion, and is perpendicular to the blowout surface 16 from a peripheral end thereof. A side surface 17 is formed upward, and a flange 18 is further formed outward from an upper end of the side surface 17, and the upper portion is opened. Note that a portion surrounded by the blowing surface 16 and the side surface 17 is defined as a storage portion 19.
Further, a part of the flange 18 is formed with an extension at a position facing each other, and a handle 20
Is provided.

The diameter of the cylindrical portion formed by the side surface 17 of the perforated plate unit 3 is set so as to be substantially fitted inside the upper portion of the lower layer 8. That is, the perforated plate unit 3
Is set on the upper part of the lower layer 8, a slight gap is formed between the side surface 17 of the perforated plate unit 3 and the inner surface of the lower layer 8. Accordingly, the hot air from the flowing air blowing chamber 4 does not directly hit the vicinity of the flange 18 of the perforated plate unit 3, so that the heating state of the flange 18 is considerably eased. In addition, since the flange 18 is located by the depth of the side surface 17 on the side of the flow chamber 5 where the temperature is lower than that of the flow blow chamber 4, it is not necessary to use a heat-resistant seal.

The depth of the storage section 19 is large enough to store the unprocessed product and the medium ball A in the non-fluidized state of the fluidized bed. Here, the term “storage” refers to a case where the perforated plate unit 3 is removed from the lower layer 8 and transported even when the height of the unprocessed product and the medium sphere A exceeds the upper surface of the perforated plate unit 3. If the medium spheres A and the like are not spilled from the perforated plate unit 3, it is assumed that they can be stored.

Further, the mode of forming the blow-out holes 15 in the blow-out surface 16 is one element that determines the flow state in the flow chamber 5, and can take various forms.
As shown in FIG. 5A, a wire mesh is formed as shown in FIG. 5A, a hole is simply punched as shown in FIG. 5B, or as shown in FIG. What can blow out from the lateral direction etc. can be applied.

Next, the seal portion S is formed between the upper and lower surfaces of the flange 18 of the perforated plate unit 3 and the intermediate layer 7 or the lower layer 8.
Sealing material 2 made of foamed silicone with a ring shape between
1 is provided. The sealing material 21 made of foamed silicon is inferior in heat resistance, but has good elasticity and excellent sealing properties, so that it can exhibit almost perfect sealing properties. In this connection, the sealing material 21 made of foamed silicon, which is inferior in heat resistance but excellent in sealing property, can be used because the perforated plate unit 3 is formed in a container shape as described above. Is not directly heated by the hot air, and the position of the
Because it is on the side, the flange 18 is not so heated. In this embodiment, the sealing material made of foamed silicon is used. However, the present invention is not limited to this. For example, a resilient sealing material such as fluorine rubber or neoprene rubber may be used.

The fluidized-bed drying apparatus 1 to which the present invention is applied has the above-described structure. The operation state and maintenance of this apparatus will be described below. First, the operation state will be described. Hot air supplied from the hot air inlet 9 is blown into the flow chamber 5 through the blowout hole 15 of the perforated plate unit 3, and in the state where the medium sphere A is flowing by the flowing air, the nozzle Slurry or liquid raw material M is supplied from 12.

Then, the raw material M becomes as shown in FIG.
It adheres in a thin film form while being dispersed on the surface of the medium sphere A. From the surface of the flowing medium sphere A, the heat conduction from the medium sphere A and the convective heat transfer from the flowing hot air cause
As shown in (b), water evaporates quickly. Further, the raw material adhering to the medium sphere A is dried by evaporating the water, and only the solid content remains on the surface of the medium sphere A, but FIG.
As shown in (1), the particles are separated from the medium sphere A by the impact of the collision of the medium spheres A, pulverized, and discharged to the outside from the hot air discharge port 10 by flowing air. In addition, this powder material is collected in a later step to be a product.

Next, the maintenance of the fluidized bed dryer 1 will be described. Although maintenance is required to clean the inside of the bed and to remove the remaining processing residue accumulated in the bed, in this apparatus, the fluidized bed main body 2 is disassembled. When disassembling the perforated plate unit 3, the intermediate layer 7 is removed as shown in FIG. 1, and then the perforated plate unit 3 is detached from the lower layer 8 by grasping the handle 20 and lifting it up.

By the way, the perforated plate unit 3 has a container shape, and the medium spheres A and the unprocessed products are stored in the storage portion 19. Therefore, even if the intermediate layer 7 is removed, the medium spheres A are not scattered. When collecting the medium spheres A and the processing residue, it is sufficient to transfer the whole perforated plate unit 3 instead of transferring them to another container.

The above is an explanation of an embodiment in which the present invention is applied to a fluidized bed drying apparatus 1 which is an example of a fluidized bed processing apparatus. The present invention can be similarly applied to other fluidized bed processing apparatuses that perform such processing. In the fluidized bed processing device that performs granulation and coating, media balls are not used, so the depth dimension of the perforated plate unit is set in consideration of the volume of unprocessed products and products remaining on the perforated plate unit during maintenance. do it. When the flowing air is cold air, the relationship with the sealing material does not matter, but there is room for application of the present invention in that it is easy to collect residual products, so fluidized bed processing using cold air as the flowing air The present invention can be applied to a device.

[0024]

[Effect of the Invention] In the present invention, the perforated plate unit is formed in a container shape so that the hot air from the flowing air supply chamber does not directly hit the seal portion, and the position thereof is also on the side of the flowing chamber having a lower temperature than the flowing air blowing chamber. Therefore, the sealing can be completely performed by using a sealing material having good elasticity and excellent sealing properties such as a seal made of foamed silicon. Therefore, in the past, it was rare to perform disassembly at the time of maintenance with emphasis on maintaining the sealability, but in the fluidized bed processing apparatus to which the present invention is applied, it is possible to easily disassemble and perform maintenance without worrying about the sealability. .

Further, since the perforated plate unit is formed in a container shape, the perforated plate unit can be transported together with the unprocessed product and the medium sphere while the perforated plate unit is stored therein, and the workability during maintenance is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fluidized bed drying apparatus to which a perforated plate unit of the present invention is applied.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged perspective view showing the perforated plate unit of the present invention.

FIG. 4 is a vertical sectional side view of the same.

FIG. 5 is an explanatory view showing various embodiments of a blowing surface.

FIG. 6 is a schematic diagram showing a stepwise manner in which a raw material attached to a medium ball is dried and peeled off.

FIG. 7 is a vertical side view showing a problem when a conventional perforated plate unit is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluidized bed drying apparatus 2 Fluidized bed main body 3 Perforated plate unit 4 Fluidized air blowing chamber 5 Fluidized chamber 5a Exhaust chamber 6 Upper layer 7 Intermediate layer 8 Lower layer 9 Hot air inlet 10 Hot air outlet 11 Raw material supply pipe 12 Nozzle 13 Lookout window 14 Inspection port 15 Blow-out hole 16 Blow-out surface 17 Side surface 18 Flange 19 Storage section 20 Handle 21 Sealing material A Medium ball S Sealing section M Raw material

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B01J 8/00-8/46 B01J 2/00-2/30 B05C 19/02 F26B 3/08

Claims (2)

(57) [Scope of request for utility model registration] 1. A fluidized bed main body is partitioned by a perforated plate unit having a plurality of blowout holes, and a fluidized chamber is formed at an upper portion, and a fluidized air blowout chamber is formed at a lower portion. In the apparatus for supplying the flowing air to the fluidized chamber side and subjecting the object to be treated in the fluidized chamber, the perforated plate unit has a surface having the blowout hole as a bottom surface, and a side surface substantially fits inside the fluidized bed main body. It is formed as the upper is the upper end open Ri formed is formed a flange involved in the seal portion outwardly, and the medium balls are fluidized together with an object to be processed or
Or depth enough to store the unprocessed waste
This perforated plate unit has a container shape
Can remove the knit and transfer the media ball or the remaining product
A perforated plate unit in a fluidized bed processing apparatus, characterized in that the perforated plate unit is capable of functioning . 2. A perforated plate unit in fluid bed processor according to claim 1, wherein a handle is provided on the flange.