JPS6268536A - Method and apparatus for treating particulate material - Google Patents

Abstract

PURPOSE:To obtain a uniform granulated product, by a method wherein rotary plates are arranged in a treatment chamber at definite intervals in a multistage fashion through ring shaped venting members and the gas is further injected in the treatment chamber while being introduced from the inside of each ring shaped venting member to treat a particulate material by the rotation of the rotary plates and the action of a gas stream. CONSTITUTION:A rotary shaft 5 is provided to the bottom part of a treatment chamber and rotary plates 8 are arranged to the upper part of said rotary shaft 5 in a multistage structure so as to be spaced apart by the height of each venting ring 10 and to successively reduce the diameters of each rotary plates to the upward direction. The rotary plates 8 are provided with venting openings 12 inside the venting rings in the radius direction except the uppermost one and an annular space 16 is formed between the lowermost rotary plate 18 and a container 1. When a particulate stock material is changed in the treatment chamber, the stock material is fluidized from the gas stream from the annular space 16 and tumbled while receiving centrifugal tumbling action by the rotation of the rotary plates 8. Further, said stock material receives the force to the outside in the radius direction from the venting rings 10 and is pressed to the inner wall surface of the treatment container 1 to be formed into a heavy particulate material having a uniform particle size.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a method and apparatus for processing powder and granules, and in particular, a method and apparatus for processing powder and granules that perform processes such as granulation, coating, drying, and mixing of powder and granules in a fluidized bed type processing chamber. The present invention relates to a body treatment method and device.

[Background technology]

In general, fluidized bed powder processing technology involves ejecting a gas flow from below the fluidized bed made of a fixed perforated plate to fluidize the powder in the processing chamber, and using a binder solution to form the powder. A method has been proposed that aggregates the .

However, in this conventional technology, the powder and granules are granulated by being brought into a fluid state solely by the action of the ejected gas flow, so the granulated products are light and have an irregular shape, and the particle size distribution varies over a wide range. There is a problem.

Therefore, it has been proposed to use a rotating plate as the fluidized bed in the processing chamber, and produce a uniform granulated product by applying centrifugal rolling and swirling effects to the powder and granules through the rotation of the rotating plate and the gas flow from below. (For example, see Japanese Patent Laid-Open No. 59-55337).

According to this conventional technology, excellent effects such as being able to produce a uniform granulated product with a desired particle size can be obtained, but there is only one rotating plate, and the powder is not processed on the rotating plate. The force that moves the particles in the radial direction is provided by the rotation of the rotating plate. Therefore, if the centrifugal rolling of the powder on the rotating plate and the pressing force of the powder against the inner wall of the processing chamber are insufficient, it may become impossible to obtain the desired heavy granulated product. obtain.

[Purpose of the invention]

An object of the present invention is to provide a method and apparatus for processing powder and granular material that can produce a heavy and uniform product.

Another object of the present invention is to provide a powder and granule processing method and apparatus that can improve the processing efficiency of granulation, coating, drying, etc.

Still another object of the present invention is that the inside of the processing chamber can be easily cleaned;
It is an object of the present invention to provide a method and apparatus for processing powder and granular material that can obtain a 7N clean product without cross-contamination.

Still another object of the present invention is to provide a powder processing method and apparatus that prevent leakage of powder raw materials.

[Summary of the invention]

In the present invention, a plurality of rotary plates are separated from each other by an annular ventilation member, and gas introduced from a ventilation opening of the rotary plate radially inside the annular ventilation member is jetted radially outward through the annular ventilation member. and by rotating the rotary plate, the powder and granules are treated while being rolled on the powder and granular material by the action of the rotation of the rotary plate and the gas flow radially outwardly ejected through the annular ventilation member. be.

As a result, the powder and granules are processed while being subjected to centrifugal rotation on the rotary plate and the pressing action of the gas flow radially outward, and the pressing force toward the inner wall of the processing chamber. can be produced efficiently, and can also prevent powder leakage.
This makes it possible to improve cleaning performance.

[Embodiment 1] FIG. 1 is an overall schematic sectional view of a powder or granular material processing apparatus according to an embodiment of the present invention, and FIG. 2 is an enlarged partial sectional view of the main parts thereof.

In this Example 1, the powder/granular material processing apparatus granulates the powder/granular material,
It has a structure in which an upright cylindrical processing container 1 for performing processing such as coating, mixing, and drying is erected on a base 2. Inside the processing container 1, a processing chamber 3 forming a flow chamber is provided as will be described later. A raw material input port 4 for supplying powdered raw material is provided on the side surface of the processing chamber 3.

Further, a rotating shaft 5 is provided at the center of the bottom of the processing chamber 3 in the vertical force direction, and this rotating shaft 5 is rotated by a motor. Above the rotating shaft 5, a plurality of disc-shaped rotating plates 8 are arranged in a multilayered manner with predetermined gaps in between in the vertical direction. That is, the rotary plate 8 at the bottom is held by the rotary shaft 5 with a support 9, and the rotary plate 9 located next above is held at the bottom by the height of the ventilation ring 10 which functions as a spacer and leakage prevention means. It is spaced apart from the rotary plate 8. There are five rotary plates 8 in this embodiment, and the third rotary plate 8 from the bottom and the upper rotary plates 8 also have ventilation rings between them as described above.
0 in a multilayer structure. The rotary plate 8 is used to roll powder and granules on its upper surface by centrifugal action, and is configured such that its diameter gradually decreases from the bottom to the top. The top rotating plate 8 is the cap 1
1 is screwed onto the rotating shaft 5 to be fixed.

The ventilation ring 10 is positioned by fitting its upper end into an annular groove 8a on the back surface of each rotary plate 8 so that its axis does not shift due to rotation of the rotary plate 8.

The rotating plate 8 and the ventilation ring 10 can be easily detachably assembled by sequentially and alternately fitting them onto the rotating shaft 5 with the cap 11 removed. Therefore, during cleaning, the rotating plate 8 and the ventilation ring 10 can be easily removed and washed individually by removing the cap 11 and then pulling them out from the rotating shaft 5 one after another. As described above, due to the detachable structure, the rotary plate 8 and the ventilation ring 1o of this embodiment can maintain a high level of cleanliness, and the inside of the processing chamber 3 can be kept /U clean.

The ventilation ring 10 is made of, for example, a porous material or a mesh material.
It is made of a material that is breathable and can act as a leak-tight material.

Furthermore, the rotary plates 8 are provided with a ventilation loop 2 on the inner side of the ventilation ring 10 in the radial direction, except for the uppermost rotary plate 8. A plurality of ventilation openings 12 may be arranged circumferentially at intervals as shown in FIG. 5, or other shapes of openings or doughnut-shaped structures may be used. be. In addition, in FIG. 5, the hole 13 at the center of the rotating plate 8 is connected to the rotating shaft 5.
It is a hole through which the

On the other hand, below the rotating plate 8 at the bottom of the treatment material 3,
Gas is supplied from a blower 14 through a valve 15. This gas flows through the ventilation openings 12 of the rotating plate 8.
In addition to being ejected radially outward from the jj1 air ring 10 through the It functions as a gas that fluidizes body materials.

A discharger t* 17 for taking out the product is provided on the side surface of the processing container 1 at approximately the same height as the lowermost rotary plate 8.

Further, in the processing chamber 3 on the side of the rotary plate 8, there is a crushing mechanism 18 for crushing the powder and granules being processed to obtain a spherical product with a large bulk density, and a crushing mechanism 18 for crushing the powder and granules being processed to obtain a spherical product with a large bulk density, and a cochindar liquid or a binder. A spray device 19, such as a two-fluid spray gun structure, is provided for spraying liquid or the like. A spray device 2 such as a two-fluid spray gun structure is installed above the rotating plate 8.
0 can also be provided.

Further, in the upper part of the processing container l, there is a bag filter 21 for collecting fine powder entrained in the gas flow, an M22 for dispersing 4,
Also provided is an exhaust duct 23 for discharging exhaust gas to the outside of the system.

The operation of this embodiment will be explained below.

First, when introducing the granular raw material into the processing chamber 3 from the raw material input port 4, if necessary, for example, gas from the blower 14 is passed through the valve 15 to an extent that the granular raw material does not leak from the annular space 16. While feeding downwards on the rotary plate,
Powder raw materials are introduced.

Next, the rotating shaft 5 and the rotating plate 8 are rotated, and the valve 15 is further opened to supply fluidizing gas from the annular space 19 into the processing chamber 3 . Furthermore, the spray supplies Cochindar liquid or binder liquid into the processing chamber 3 from one or both of 19 and 20, and further operates the crushing mechanism 18 as required.

As a result, the gas from the blower 14 is ejected radially outwardly between each rotating plate 8 through the ventilation opening 12 of the rotary plate 8 through the ventilation ring IO, and is supplied into the processing chamber 3 using the annular space 16. .

Therefore, the granular raw material is fluidized by the gas flow from the annular space 16, and due to the rotation of the rotary plate 8, the granular raw material on each rotary plate 8 undergoes centrifugal rolling action and rolls. In addition to this, the granular raw material receives a radially outward force due to the gas flow ejected radially outward from the ventilation ring 1°, and is pressed against the inner wall surface of the processing container I, so that the centrifugal force and This radially outward force allows a heavy product to be obtained.

Furthermore, in addition to the centrifugal rolling action caused by the rotation of the rotary plate 8, the powder and granular material is subjected to the action of the gas flow outward in the radial direction, which promotes its rolling and dispersion, so that uniform particle size can be achieved. In addition to being able to obtain spherical products, processing efficiency can be improved, for example, by increasing the stretching speed and drying speed of the Cochindia liquid film.

The product thus manufactured is taken out and collected by opening the discharge mechanism 17.

[Embodiment 2] FIG. 3 is an enlarged partial sectional view showing a main part of another embodiment of the present invention.

In this second embodiment, the rotary shaft 5 extends from the top to the bottom, and the Nand 24 is screwed to the lower end, so that a plurality of rotary plates 8
It consists of a structure in which a ventilation ring 1o is detachably assembled in a multi-layered manner.

In the case of the second embodiment as well, heavy products can be manufactured efficiently by the centrifugal force generated by the rotation of the rotary plate 8 and the force of the gas flow radially outwardly ejected from the ventilation ring 1o. .

[Embodiment 3] FIG. 4 is an enlarged partial sectional view showing still another embodiment of the present invention.

In Example 3, instead of the ventilation ring 1o made of a breathable material in Example 1, a ventilation ring 10a provided with gas ejection holes 10b large enough to prevent leakage of powder and granules is used. .

This ventilation ring 10a has a smaller diameter than the ventilation ring IQ, and has a diameter considerably smaller than the diameter of the rotary plate 8 separated by each ventilation ring IOa.

In addition, in the third embodiment, the rotary plates 8 excluding the top and bottom ones have a donut-shaped structure, and the top rotary plate 8 also has a radial direction more than the ventilation ring 10a below. A ventilation hole 25 extending in the vertical direction is provided in the inner part.

Also in the case of the third embodiment, the rotation of the rotary plate 8 and the gas nozzle 1
Heavy products can be efficiently obtained by the gas flow ejected outward in the radial direction from 0b, and the plurality of rotary plates 8 and the ventilation ring 10a can be assembled and detached easily by simply removing the camp 11. Since it can be disassembled and has good cleaning properties, its cleanliness can be maintained and sanitary processing can be performed for a long period of time.

Note that this embodiment is not limited to the above embodiment, and various other modifications are possible.

For example, the shape of the processing container can be made approximately spherical as shown by 1a in FIG.

Further, the diameter of the ventilation ring and rotating plates, the number of rotating plates, etc. can be selected as appropriate.

Furthermore, the rotating plates can also be fixed to the rotating shaft at predetermined intervals.

Further, the gas ejection holes may be formed in the tangential direction of the ventilation ring.

〔effect〕

(1) Due to the centrifugal rotation caused by the rotation of a plurality of rotary plates and the action of the gas flow jetted radially outward from the annular ventilation member that forms the gap between the rotary plates, the powder and granules are Since it is pressed toward the inner wall of the processing chamber, a heavy product can be obtained.

(2) The efficiency of processing such as granulation, coating, mixing, or drying of powder particles can be improved by the action of the gas flow outward in the radial direction.

(3) The annular ventilation member can prevent powder from leaking into the ventilation openings of the rotary plate, eliminating waste of materials and making it possible to process powder and granules in a sanitary manner.

(4) The 8 rotating plates and the air permeable annular members that separate the rotating plates are alternately arranged so that they can be attached to and removed from each other, making it easy to disassemble and clean and maintain a high level of cleanliness. Therefore, it is possible to perform extremely hygienic processing without causing cross-contamination, etc.
It is very advantageous in terms of acturing practice, and is also useful in processing pharmaceuticals, foods, etc.

[Brief explanation of drawings]

FIG. 1 is an overall schematic sectional view of a powder/granular material processing apparatus that is an embodiment of the present invention, and FIG. 2 is an enlarged partial sectional view of the main parts thereof.
FIG. 3 is an enlarged partial sectional view showing a main part of another embodiment of the present invention, FIG. 4 is an enlarged partial sectional view showing still another embodiment of the invention, and FIG. 5 shows an example of a rotary plate. FIG. 1, la...processing container, 2...base, 3...processing chamber, 4...raw material inlet, 5...rotating shaft, 6...motor, 8 ... Rotating plate, 8a ... Annular groove, 9 ... Retaining ring, 10.103 ... Ventilation ring, 10b ... Gas outlet, 11 ... Camp, 12 ... ... Ventilation opening, 13 ... Hole, 14 ... Blower, 15 ... Valve, 16 ... Annular space, 17 ... Carrying out mechanism, 18 ... Crushing mechanism , 19.20... Spray device, 21... Bag filter, 22... Lid for explosion dissipation, 23... Exhaust duct, 24... Nut, 25... Conduit. stomata. Fig. 2 Fig. 3 Engraving of the drawings (no changes in content Fig. 1 Fig. 4 Fig. 5 Procedural principal authorship (spontaneous) October 28, 1985 Commissioner of the Patent Office Mr. Junbu Uga 2, Invention Name Powder processing method and device 3, relationship with the case of the person making the amendment Patent applicant address 2-14-2 Takadanobaba, Shinjuku-ku, Tokyo
Name: Freund Sangyo Co., Ltd. Representative: Yutaka Fushishima Hata

Claims (3)

[Claims] (1) Gas is introduced into the processing chamber through the annular ventilation member from a ventilation opening radially inner than the annular ventilation member of a rotary plate arranged in multiple layers at predetermined intervals. The powder and granular material is treated while rolling on the rotary plate due to the action of the rotation of the rotary plate and the gas flow jetted outward in the radial direction through the annular ventilation member. A method for processing powder and granular materials. (2) A fluidized bed type processing chamber for powder and granular materials, a rotating shaft installed in the center of the processing chamber, and a plurality of layers supported by the rotating shaft in a multilayered manner with a predetermined gap between each other. a rotating plate,
an annular ventilation member for vertically separating the rotary plates from each other; a ventilation opening formed in the rotary plate at a portion radially inner than the annular ventilation member; and means for rotationally driving the rotary shaft; A powder and granular material processing apparatus comprising means for supplying a gas flow from below a rotary plate. (3) The granular material processing apparatus according to claim 2, wherein the rotary plate and the annular ventilation member are alternately arranged so that they can be attached to and detached from each other.