JPS5955338A - Granulator used in common as mixer - Google Patents

Abstract

PURPOSE:To obtain a granulator which is capable of performing mixing with high efficiency by providing a low speed rotor of a cage shape which has impellers at the periphery and is disposed concentrically with a cylindrical vessel body and a high speed rotor which is disposed on the inside thereof and has impact bodies at the periphery in said cylindrical vessel body. CONSTITUTION:A material feed port 4 and a discharging port 6 are provided to a cylindrical vessel body 1 which has a horizontal axial line, and is closed at one end with an end plate 2 and at the other end with a cover plate 3 respectively. A cage type low speed rotor 10 disposed concentrically with the body 1 and a high speed rotor 11 disposed on the further inside of the rotor 10 by making it to have a horizontal axial line are provided in the body 1. Plural impellers 14 in proximate to the inside peripheral surface of the cylindrical shape of the body 1 are projected on the periphery of the rotor 10, and plural impact bodies 18 are projected on the periphery of the rotor 11. The rotors 10, 11 are rotated respectively at required rotating speeds by driving shafts 12, 20. Granules of particularly about 24-145 mesh grain sizes are produced in a good yield by the above-mentioned device and the mixing of >=2 kinds of powders with high efficiency is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention combines a mixer capable of mixing two or more types of powder, and in particular, after mixing the powders, water or a binder solution is added to the mixer to achieve uniform particle size. This invention relates to a wet granulator for producing rope granules.

Conventional wet granulation methods of this type include the spray granulation method, in which a material solution is spray-dried and granulated, and the flow N method, in which the powder is humidified while flowing on a perforated plate, grown, and dried to form granules.
Granulation method: A crushing granulation method in which the water-mixed powder is crushed by a crushing granulator to create granules, which are dried and then sieved. Agitation granulation methods are known, in which granules are made by adding liquid to the granules, but in either case, the particle size distribution of the granules varies widely, and the desired particle size ratio wb is around 50% or less. However, it is extremely inefficient, and it is extremely difficult to make the particle size uniform.

This invention is particularly applicable to the wet granulation method as described above.
．． 7% (24 meshes) ~ 0.1λ (145 meshes)
The purpose of the present invention is to provide a granulator that can produce granules with a diameter of about 100 to 100 mL with a high yield, and which also doubles as a mixer that can mix two or more types of powder with extremely high efficiency. The purpose is to provide opportunities.

To explain the embodiment, as shown in FIGS. 1 and 2, the cylindrical container 1 is placed in the upper part of a cylindrical container 1 whose axis is arranged horizontally and whose one end is closed with an end plate 2 and the other end with a lid plate 3. A material input port 4 is provided, and a product discharge port 6 that is opened and closed by a lid 5 is provided at the bottom. The cover plate 3 can be attached and detached for washing and cleaning the inside of the container 1, and the material input port 4 has a cover 7 that closes the input port 4 during granulation work as shown in the figure. It is good to have one. 8 is a hopper for feeding materials, and 9 is a connecting rod for opening and closing the lid 5 of the discharge port 6 by an opening/closing mechanism (not shown).

A low-speed rotor 10 concentrically arranged in a container body 1 and a high-speed rotor 11 inside thereof are rotatably provided.

As shown in detail in FIG. 3, the low-speed four-wheeler 10 is formed in a fixed shape on the end face of a disc 13 provided at the shaft end of the drive shaft 12, and the cylindrical inner periphery of the vessel l is attached to the outer periphery of the disc 13. A plurality of stirring blades 14 are provided protrudingly close to the surface. In the case of FIG. 3, when the low-speed rotor lO rotates in the direction of arrow A, the material inside the container 1 is moved from both ends of the container 1 in the axial direction toward the center as indicated by the arrow a.
The stirring blades 14 are given an appropriate inclination with respect to the axis of the low-speed rotor 10 so as to be moved in the a'-axis direction, and are further arranged at both ends of the low-speed rotor lO. A scraper 15 is formed to scrape off the adhered powder by the rotation of the low-speed rotor 10. Drive shaft 12
is rotatably supported on the bottom plate 2 via a bearing 16, and is driven by a chain drive mechanism (only the chain wheel 17 is shown).
Rotate at speeds R, P, and M.

As shown in the figure, the high-speed rotor 11 has a drive shaft rotatably supported by a bearing 19 on the cover plate 3. The high-speed rotor 11 has 1iI+7 projecting bodies 18, which are elongated plate-shaped bodies extending from one end to the other, arranged equidistantly on the circumference as shown in the figure. For example, if the diameter of a cylindrical container is 205) φ, the arrow B in the figure
It is driven by Takatsuji as shown in the figure.

Reference numeral 21 is a high Le rotor drive motor, and the rotation speed of the motor is changed using an inverter (frequency converter). A device with a built-in transmission device (not shown) or a variable speed motor may also be used.

When the impact body 18 of the high-speed rotor 11 is configured as shown in the fourth figure, the high-speed rotor 1
By rotating in the direction of arrow B of 1, the material inside the vessel 1 is moved in one direction of arrow b', or in one direction from the center to both sides of the vessel l as shown by arrows b and bt. It can be moved.

Further, as shown in FIG. 5(a), the impact body 18a may be a plate-shaped body having a length obtained by dividing the length of the high-speed rotor 11 into a plurality of parts. Relatedly, the material can be moved in one direction of arrows or b' or in two directions of b-b'.

FIG. 5(b) shows a case where the impact body isb is tilted with respect to the axis of the high-speed rotor 11, and the material is moved in the b direction by the tilt, or b′ (not shown) as the opposite tilt.
If it is tilted symmetrically from the center, it can be moved from the center to both sides.

The 51st item (Q) is one in which the length of the bait 1 attachment body 18c is further shortened, and in this case, the bait 1 attachment body 18c is arranged symmetrically in a spiral shape.
In this figure, the material inside the vessel is moved in two directions b-b' by the rotation of the high-speed rotor 11 in the direction of arrow B.

In Figures 1 and 2, 22 is a spray for adding water or other liquid to powder, which sprays water when adding water, etc.; Any type of liquid can be used, such as one that rapidly adds liquid. 23 is a frame that supports the container body 1.

6 and 7 are diagrams showing other embodiments of the present invention, in which the rotational axis of the high-speed rotor 11 is
The rotor 10 is eccentrically located below the axis of the low-speed rotor IO and is provided horizontally, and the same parts as in FIGS. 1 and 2 are given the same reference numerals. Providing the high-speed rotor 11 eccentrically in this manner is effective when enhancing the stirring and forced flow by the high-speed rotor 11, or when the amount of processing at one time is small. In addition, the effect of crushing oversized particles by the impact body 18 of the high-speed rotor 11 is also increased. FIG. This drive mechanism is provided on the end plate 2 side and is configured to rotate concentrically at different rotational speeds using double shafts 20. Further, the stirring blade 14a of the low-speed rotor IO spirally twists a ribbon-shaped plate material to bring it close to the cylindrical inner circumferential surface of the vessel body 1, and moves the material inside the vessel body 1 in one direction as shown by arrow a. The high-speed rotor 11 also has an impact body 180 protruding in a spiral arrangement so as to move the material in one direction as shown by the arrow.

In the above embodiments, the low-speed rotor 1o and the high-speed rotor 11 are rotated in opposite directions to increase the difference in rotational speed, but they may also be rotated in the same direction. Impact body 18118 of high-speed rotor 11
a + 18 b + 18 c may have a knife-hammer shape in addition to the configuration described above.

This invention has the above configuration, and each rotor 10,
11 at an appropriate speed, several kinds of powder or one
By putting the seeds into a powder container and, if necessary, adding an appropriate amount of binder and operating the container for several tens of seconds to several minutes, the powder and binder or several types of powder are transferred to the high-speed rotor 11. The particles are efficiently mixed and stirred by the body and the stirring blade of the low-speed rotor 10 while being moved in the axial direction of the container body 1, and are uniformly dispersed.

Thereupon, water or liquid is added at once, or dripped, or dripped in a spray 22, or the required amount is rapidly supplied to each rotor 10.11 in that state.
By continuing the rotation, it is possible to efficiently produce granules within the above-mentioned performance range.

That is, when water or the like is supplied to the well-mixed powder in the container 1, the powder first aggregates and grows using the liquid as a core, forming wet aggregates, as shown in Figs. 2 and 7. As shown in the figure, as the low-speed rotor 10 rotates in the direction of arrow A, the stirring blade 14 lifts the liquid from below to above, and it falls toward the high-speed rotor 10.

That is, it collides with the impacting body 18 rotating at high speed, is crushed, and moves centrifugally, is lifted up again by the stirring blade 14, falls, and is caused to collide with the impacting body 18. During this time, the material inside the vessel is also moved around each rotor 10 by the rotation of each rotor 10°11, and by the arrangement of the cat-stirring blade 14 and the impact body 18.
, 11 in the axial direction at a speed commensurate with the rotation speed of 11, the fine powder is moved in the axial direction within the vessel 1 and subjected to the mixing finger pressure, and the fine powder adheres to the wet core with the liquid and becomes a certain size. Grains that have grown and have grown excessively collide with the impact body 18 from above the high-speed rotor 11 due to their own gravity, and small grains rotate at high speed.
The impact body 1 is directly blown away by the wind pressure of the KM body 18.
It almost collides with 8.

As described above, the rotation of the low-speed rotor 10 stirs the powder and moist nodules that collect at the bottom of the container body 1, causes them to grow according to the degree of moisture, and moves them above the container body 1. and fall toward the high-speed rotor 11. on the other hand,
The rotation of the high-speed rotor 11 causes the nodules that are lifted above the vessel body 1 and fall to collide with the impacting body 18 and break them up to form pancreatic granules with a desired diameter, while also destroying small granules with a diameter smaller than the required diameter. The wind pressure generated by the rotation of the f[8 body 18 blows away the particles and has a classification effect that prevents them from being crushed.

Therefore, by repeating these mixing, stirring, granulating, crushing, and classifying actions nine times, the quality of the powder inside the container improves.
Although it varies depending on the physical properties, the physical properties of the binder, the amount of liquid added, etc., the granules are granulated in a size commensurate with the rotational speed of the high-speed rotor 11, and there is extremely little occurrence of oversized or undersized granules, and the granules are within the desired particle size range. Granules can be produced extremely efficiently in a short period of time by appropriately selecting the rotational speed of the high-speed rotor or the relative rotational speed of the high-speed rotor and the low-speed rotor. kinds,
By appropriately determining the type of liquid, mixing amount, etc., granules of any particle size range can be obtained.

Further, even with the same material, by changing the rotation speed of the high-speed rotor and the granulation time, the particle size, yield, and bulk density of the granules can be brought close to desired values.

The experimental results based on pharmaceutical specifications regarding this are shown in Figure 9 and 1.
0 and 11.

Material name Sugar 60% 0.5 KW/t Cornstarch 30% Q, 3sl [P/z Avicel 10
% 0.3 secret/l Binder (PTA) 3% aqueous solution 25%D,
B Charge amount: 2t/batch Dry powder mixing time: 2 minutes Liquid addition time: 30 seconds Apparatus Height: 150% to vessel diameter 205 The high-speed rotor is a device arranged concentrically with the low-speed rotor. In Figure 9, the granulation time is the same but the rotation speed is is 6000R, P
, M shows that the particle size becomes even smaller, whereas in Fig. 10, the yield of fine particles of 32 to 145 meshes changes depending on the granulation time and the rotation speed of the high-speed rotor. It is shown. FIG. 11 shows that the bulk density of the granulated granules varied depending on the granulation time and rotation speed.

In addition, if the position of the high-speed rotor is eccentrically downward as shown in Figures 6 and 7, it is possible to This is effective when you want to strengthen the effect of forcing the rotor to flow in the axial direction (mixing effect). Providing the high-speed rotor and low-speed rotor drive parts on the left and right sides simplifies the drive mechanism and improves the manufacturing process. This is advantageous for cleaning the inside of the grain machine.

Furthermore, if the stirring blades 14 are made short as shown in FIGS. 1 to 3 instead of being long ribbon-like as shown in FIG. 8, it is easier to manufacture a low-speed rotor and the driving torque can be reduced. can do.

[Brief explanation of the drawing]

Figure 1 is a vertical front view of the embodiment, Figure 2 is a cross-sectional side view, Figure 3 is a front view of the low-speed rotor, Figure 4 is a slope view of the high-speed rotor, Figure 5 (→l (b) l (c) is a perspective view of another embodiment of the high-speed rotor, FIG. 6 is a longitudinal sectional front view of another embodiment, FIG. 7 is a cross-sectional side view, and FIG. 8 is a longitudinal sectional front view of yet another embodiment. Fig. 9, Fig. 1θ, and Fig. 11 are graphs regarding the particle size, yield, and bulk density of granulation. 1... Container body, 2... End plate, 3... Lid plate. , 4...
Material input port, 5...lid, 6...outlet, lO...
Low speed rotor, 11... High speed rotor, 12.20-=drive shaft, 14, 14a... Stirring blade, 18.18a, 1
8b, 180・i ordinary body, 22... Spray applicant Fuji Paudal Co., Ltd. Figure 8 Figure 10 To the rent (wide) Figure 9 Figure 1 Payee's debt collection (9)

Claims (1)

[Claims] (1) A cylindrical container whose axis is horizontal and whose one end is closed with an end plate and the other end with a cover plate is provided with a material input port and a material discharge port, A shaped low-speed rotor is arranged concentrically with the rotor, and a high-speed rotor is arranged with its axis horizontally further inside the low-speed rotor. A mixer-cum-granulator comprising a protruding stirring blade, a plurality of impact bodies protruding from the outer periphery of a high-speed rotor, and drive means for rotating a low-speed rotor and a high-speed rotor at respective required rotational speeds. (2) The mixer/granulator according to claim (1), in which the high-speed rotor is arranged concentrically with the cylindrical container body and the low-speed rotor. (4) The mixer/granulator according to claim (1), which is arranged eccentrically from the axis of the rotor. (4) The drive means for the low-speed rotor is placed outside one end of the circular fJ-shaped vessel, and the drive means for the high-speed rotor. Mixer/granulator (5) according to any one of claims (1) to (3), wherein the high-speed rotor and the low-speed rotor are arranged on the outside of the other end of the cylindrical vessel. (6) A mixer/granulator according to any one of claims (1) to (4), which is configured to rotate in opposite directions. The mixer according to any one of claims (1) to (5), comprising a continuous plate-like body from one end of a rotor to the other end, and provided on the rotor at equidistant positions on the circumference. Dual-purpose granulator (7) An impact body protruding from a high-speed rotor consists of a long plate-like body divided into a plurality of pieces in the axial direction of the rotor, and the material is blown in the axial direction of the rotor by the rotation of the high-speed rotor. Claims (1) to (5) provided in an arrangement that moves the claims (1) to (5)
(8) The mixer-cum-granulator according to any one of the claims (8), wherein the impact body protruding from the high-speed rotor is provided in a spiral arrangement on the surface of the rotor (mixing machine described by force). Multi-purpose granulator (9) The impact body protruding from the high-speed rotor is tilted in a spiral direction with respect to the axis of the high-speed rotor and protrudes from the surface of the rotor. 10) Claims (1) to (9) in which the stirring blades of the low-speed rotor are tilted so that the material moving inside the container due to the rotation of the high-speed rotor is moved in the opposite direction by the rotation of the low-speed rotor. Mixer-cum-granulator αυ according to any one of the above, an impact body is arranged so that the rotation of a high-speed rotor moves the material in the container from the center in the axial direction of the container toward both sides, Mixer/granulator 02 according to claim 00, which is provided with stirring blades so that the material is moved in the opposite direction by rotation.The material in the container is moved along the axis of the container by the rotation of a high-speed rotor. The mixer-cum-granulator according to claim 00), wherein the mixing body is arranged so as to move the material in one direction, and the stirring blade is provided so that the material is moved in the opposite direction by rotation of the low-speed rotor.