JPS60179130A - Granulation process and device - Google Patents

Abstract

PURPOSE:To produce granules having specified grain size with high yield by providing a cage-shaped stirring rotor arranged concentrically with a housing vessel and an impact rotor to the inside of the stirring rotor, in a cylindrical vessel, and repeating mixing, stirring, granulation, crushing, and classification. CONSTITUTION:A charging port 4 of raw material and a discharging port 6 are provided to a cylindrical vessel 1 having a horizontal axial line with one end closed with an end plate 2 and another end closed with a cover plate 3. Further, a cage-shaped stirring rotor 10 arranged concentrically with the body 1 is provided in the body 1, and an impact rotor 11 having an axial line held horizontally is provided to the inside of the rotor 10. Plural numbers of stirring element 14 inscribed to an internal cylindrical peripheral surface of the body 1 are provided protrudingly to the external periphery of the rotor 10, and plural numbers of impactor 18 and plural pins extending toward outside from the impactors 18, are provided to the external periphery of the rotor 11 protrudingly. The rotors 10, 11 are revolved with respectively necessary number of revolution. With this device, granules, particularly having 0.7-0.1mm. grain size are produced with high yield by repeating mixing, stirring, granulation, crushing, and classification.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wet granulation method and apparatus for producing fine granules with uniform particle size by mixing one or more types of granules and then adding water or a binder solution. .

Conventional wet granulation methods of this type include the spray granulation method, in which the material solution is dried in a jet garden and granulated, and the granules are flowed on a perforated plate, then humidified, grown, and dried to form granules. Fluidized bed granulation method, crushing granulation method in which granules that have been mixed with water are crushed by a crushing granulator to create granules, dried and then sieved; Agitation granulation methods are known, in which particles are added and mixed, and a liquid is added to form granules, but in either case, the particle size distribution of the granules varies widely, and the yield of the desired particle size 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 assistants (24 meals) ~ 0.1 bark (145 meals)
To provide a granulation method and device that can produce granules with a diameter of about 100 to 100 cm with a good yield, and can granulate the mixture after mixing with extremely high efficiency when two or more types of powder are mixed. The purpose is to

In the granulation method of the present invention, water or a binder solution is supplied from above the powder flow rotating through a rotary wheel on a horizontal axis to create a uniformly dispersed phase of powder and liquid, and the mixed powder that grows in this dispersed phase is First, the powder is crushed and separated by the action of an impacting body rotating at high speed at the center or eccentric position inside the rotating powder flow, or the powder is blown off by the action of the impacting body and combined with other powder to obtain the required particle size. While the particles are made fine, a plurality of pins integrated with the impacting body extending slightly outward from the impacting body restrict the overcrowding of the powder into a predetermined space including the rotation range of the impacting body, thereby reducing the impact. The granulation efficiency is further improved by promoting the separation and binding action of the mixed powder by the impacting body, and by having the pins share a part of the separation and binding action of the impacting body. It is something.

In addition, the granulation device of the present invention is a device that is used directly to carry out the above granulation method, and has 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. A material input port and a material discharge port are provided in the container, and a tubular stirring rotor is arranged concentrically with the container body, and an impact rotor is arranged with its axis horizontally inside the stirring rotor. A plurality of stirring elements protruding from the outer periphery of the rotor are provided close to the cylindrical inner circumferential surface of the container body, and a plurality of @ container bodies and a plurality of pins extending outward from the impactor body are provided protruding from the outer periphery of the impact rotor. A driving means is provided for rotating the stirring rotor and the &L'' rotor at respective required rotational speeds, and the stirring rotor moves the powder material introduced into the cylindrical container from the material input port along the inner wall of the container. At the same time, the impact body of the impact rotor separates and combines the liquid-added mixed powder, and the pin of the impact rotor restricts the powder from entering the rotation range of the impact body in a dense manner. The present invention is characterized in that it promotes the separation and connection functions of the impact bodies, and also allows the pins to share a part of the separation and connection functions.

To explain the embodiment, in FIGS. 1 and 2,
Reference numeral 1 denotes a cylindrical vessel whose axis is horizontal and whose one end is closed by an end plate 2 and the other end is closed by a lid plate 3. The vessel 1
A material input port 4 is provided at the top of the machine, and a product discharge port 6, which is opened and closed by a lid 5, is provided at the bottom. It is preferable that the lid plate 3 is removably attached to the container body 1 for washing and cleaning the interior of the container l.As shown in the second diagram, the material input port 4 is provided with a material input port 4 for the purpose of washing, cleaning, etc. It is preferable to provide a lid 7 that closes the mouth 4. 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 rotor 10 having a stirring element 14 and an impact rotor 11 are rotatably provided in the container body 1, respectively.

As shown in detail in FIG. 3, the stirring rotor 10 has a first
It is formed into a tubular shape supported by the end face of a plate 13 provided at the shaft end of the drive shaft 12, and a plurality of arm-like stirring elements 14 protruding from the outer periphery of the plate 13 are protruding from the cylindrical inner circumferential surface of the vessel l. That's what happens.

In the case of FIG. 3, when the stirring rotor 10 rotates in the direction of arrow A, the material in the container 1 is stirred so as to move from both axial ends of the container 1 toward the center in the axial directions of arrows a and a'. An appropriate inclination is given to the direction of the element 14 with respect to the axis of the stirring rotor 10. Further, the stirring elements 14 disposed at both ends of the stirring rotor 10 are formed with scrapers 15 that scrape off the powder that has adhered to the end plate 2 and the lid plate 3 by one inch through the rotation of the stirring rotor 10. For example, in the case of a cylindrical container having a diameter of 205 mm, a first drive shaft 12ii is rotatably supported by a support frame on the end plate 2 via a bearing 16. , 10-5O
Rotate at speeds R, P, M.

Impact bodies 18, which are elongated plate-shaped bodies extending from one end to the other end, are protrudingly provided on the impact rotor 11 at equal radial locations. In addition to the impact bodies 18, a plurality of bottles 24 are protruded between each of the impact bodies 18, 18 and extend slightly outward from the impact bodies 18. For example, if the diameter of the cylindrical container 1 is 205 mm, the diameter of the impact rotor 11 is 58 mm, and the height of the impact body 18 is 9 m. The second drive shaft 20, which is rotatably supported, is driven at a high speed of 3,000 to 8,000 R, P, M, as shown by arrow B in FIG. Reference numeral 21 denotes an impact rotor driving motor, and the rotation speed of the motor is changed using a converter (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 impact rotor 1 is constructed as shown in the fourth figure, the impact rotor 1
1 in the direction of arrow B, the material inside the vessel body 1 is rotated in the direction of arrow B.
It can be moved in one direction of X or b', or axially from the center to both sides of the bodywork as shown by arrows b-b'.

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 impact rotor 11 into a plurality of parts. Relatedly, one direction of arrow s or b', or b - b'
The material is moved in two directions.

FIG. 5(b) shows a case where the impact body 18'b is tilted with respect to the axis of the impact rotor 11. Due to its slope, b
The material can be moved in the direction b, or the material can be moved in the direction opposite to b as a reverse inclination.Furthermore, if the material is tilted symmetrically from the center, it can be moved from the center to both sides.

Figure 5 (C) shows the impact body 18C with a shorter length.
In this case, the left-right symmetrical spiral arrangement S is used, and by rotating the impact rotor 11 in the direction of the arrow B, the material inside the vessel body 1 is moved b - b.
' The figure shows a model that moves in two directions.

The pins 24 of the impact rotor 11 are arranged in accordance with the arrangement of the impact body 18 in FIGS.
) as shown in FIG. 5(b), or as shown in FIG. can be placed.

A knife ridge 25 is formed in a part of the circumference of the bottle 24, as shown in FIG. The orientation of this knife 25 is
so as to be opposite to the direction of movement of the aforementioned material s or b';
It is determined according to the protruding location of the pin 24.

In Figures 1 and 2, 22 is a spray for adding water or other liquid to powder, and is a spray that is sprayed at the same time as adding water or the like, or a spray that is used to add a large amount of liquid rapidly. You can use or do anything you like. 23 is a frame that supports the container body 1.

Figure 7! FIG. 8 is a diagram showing a second embodiment of the present invention, in which the rotational axis of the impact rotor 11 is
The stirring rotor 1o is eccentrically located below the axis of the stirring rotor 1o and is provided horizontally. Figure 1.

The same parts as in FIG. 2 are given the same reference numerals.

Providing the impact rotor 11 eccentrically in this manner is effective when the forced flow by the impact rotor 11 is strengthened, or when the amount of processing at one time is small. Further, the effect of crushing oversized particles by the impact body 18 of the impact rotor 11 is also increased.

FIG. 9 is a diagram showing a third embodiment of the present invention,
A material input port 4, a discharge port 6, and an opening/closing lid 5 are provided on the lid body 3, and a stirring rotor 10. Each drive shaft 12 of the impact rotor 11
．． 20ijf: It has a double shaft that rotates concentrically at different rotational speeds, and this drive mechanism is connected to the end plate 2.
The case where it is installed on the side is shown. The stirring element 14a of the shunted stirring rotor 1o is a ribbon-shaped plate material that is spirally twisted to bring it close to the cylindrical inner circumferential surface of the vessel body 1, so that the material inside the vessel body 1 moves in one direction as shown by arrow a. It is like that.

The impact rotor 11 also has its impact body 18c projecting in a spiral arrangement so that the material moves in one direction as shown by the arrow.

10 and 11 show a modification of the embodiment shown in FIG. 9. In this case, the impact body 18c is arranged symmetrically in a spiral shape, and the impact rotor 1 is rotated in the direction of the arrow B. ,
This shows an arrangement in which the material inside the vessel 1 is moved in two directions b-b'.

Further, the stirring element 14a is also twisted symmetrically in a spiral shape so that the material moves in two directions as shown by arrows a-a'.

In addition, although the above embodiment has shown the case where the stirring rotor 10 and the impact rotor 11 are rotated in opposite directions to increase the difference in rotational speed, they may also be rotated in the same direction. Various types of impact bodies 11, for example 18+18a and 18b+18c shown in FIGS. 1 and 5, may have a hammerhead shape in addition to the configuration described above.

Next, an embodiment of the granulation method of the present invention, which is carried out using the apparatus configured as described above, will be described.

The stirring rotor 10 and the impact rotor 11 are driven at low and high speeds, respectively, and one or more types of powder or one type of powder is charged into the container 1, and if necessary, an appropriate amount of binder is added and several dozen By operating for seconds to several minutes, the powder and binder or several types of powder are efficiently moved in the axial direction of the container 1 by the impact body of the impact rotor 11 and the stirring element of the stirring rotor 1o. Mix and stir to ensure uniform distribution.

Therefore, by supplying the required amount of water or liquid in a spray state by dripping, breaking, or spraying 22, and continuing the rotation of each rotor in this state, fine particles within the particle size range described above can be efficiently produced. can be manufactured.

When water or the like is supplied to the well-mixed powder in the vessel 1 as described above, the powder first aggregates and grows using the liquid as a core, forming a moist moxa-like powder/liquid mixture. As shown in FIGS. 2, 8, and 11, this mixture is lifted from below to above by the stirring element as the stirring rotor 10 rotates in the direction of arrow A, and then falls toward the impact rotor 11. That is, the mixture collides with a high-speed rotating impactor, is crushed, and moves centrifugally, is again lifted up by the stirring element and falls, and is caused to collide with the impactor toward the impact η-11. During this time, the material inside the vessel body 1 is
Due to the rotation of the stirring element and the impact body, the stirring element and the impact body are moved in the axial direction within the container body 1 at a speed commensurate with the rotational speed of each rotor 10, 11, thereby receiving a mixing and stirring action. In this process, the fine powder grows to a certain size as the mixture moistened with the liquid, and the overgrown mixture falls from above the impact rotor 11 under its own gravity and collides with the impact body, causing small The particles are blown away by the wind pressure of the impactor rotating at high speed and do not directly collide with the impactor.

As described above, the rotation of the stirring rotor 10 stirs the powder and wet mixture that collects at the bottom of the container 1, causes them to grow depending on the degree of wetness, and also causes them to move into the container 1.
and drop it toward the impact rotor 11.

On the other hand, the rotation of the impact rotor 11 has the effect of crushing the mixture falling from above in the container body 1 with the impact body to form granules of a desired diameter. In addition, small granules with a required diameter or less are blown away by the wind pressure generated by the rotation of the impactor, so they are prevented from being crushed, and the particles are thereby classified.

In the above granulation process, the rotation of the bottle 24 protruding from the impact rotor 11 restricts to some extent the intrusion of powder or wet mixture into a predetermined space including the rotation area of the impact body. The above-mentioned disintegration and granule-forming action by the impactor is greatly promoted. Further, since the pin 24 itself has the same crushing and granule forming function as the impactor, part of the function is shared by the bottle 24, and granulation is performed more effectively.

By repeating such mixing, stirring, granulation, crushing, and classification actions, the powder inside the container improves its quality, physical properties,
Although it varies depending on the physical properties of the binder, the amount of liquid added, etc., it is granulated into granules of a size commensurate with the rotational speed of the impact rotor.

Due to the above-mentioned effects, the granulation method and apparatus of the present invention extremely rarely produce granules that are too large or too small for the desired particle size.
Fine particles within a desired particle size range can be granulated very efficiently in a short period of time.

By appropriately selecting the rotational speed of the impact rotor or the relative rotational speed between the impact rotor and the stirring rotor, and by appropriately determining the physical properties of the powder, the type of binder, the type of liquid, the amount of mixture, etc. It is possible to obtain granules with a particle size range of .

Further, even if the material is the same, by changing the rotation speed and operating time of the impact rotor, the particle size, yield, and bulk density of the granules can be brought close to desired values.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the first embodiment, Fig. 2 is a transverse side view, Fig. 3 is a front view of the stirring rotor, Fig. 4 is a slope view of the percussion rotor, Fig. 5 (a), (b) and (0) are respectively slope views of modified examples of the impact rotor, FIG. 6 is a partially enlarged slope view of the bottle, and FIG. 7 is a longitudinal sectional front view of the second embodiment.
8 is a cross-sectional side view, FIG. 9 is a vertical cross-sectional front view of the third embodiment, FIG. 10 is a vertical cross-sectional front view of the fourth embodiment, and FIG. 11 is a cross-sectional side view. 1... Vessel body, 2... End plate, 3... Lid plate, 4...
Material input port, 5...lid, 6...discharge port, 10...
Stirring rotor, 11...Impact rotor, 12120...
Drive shaft, 14.14a... Stirring element, 18+18a+
18b+18c'' Impact body, 22...Spray, 24
...Bin, 25...Knife edge Fig. 5 (α) (b) Fig. 6 Fig. 7 (C) Fig. 8

Claims (1)

[Scope of Claims] (1) A binder liquid is supplied from above the powder flow rotating with a rotary wheel on a horizontal axis to create a uniformly dispersed phase of powder and liquid, and the mixed powder that grows in this dispersed phase is , a plurality of bins integral with the impact body extending slightly outward from the impact body are separated and combined by the impact body rotating at high speed inside the powder flow, and a predetermined area including the impact body rotation area is provided. A granulation method characterized by slightly restricting the intrusion of the powder into the space and promoting the separation and combination of the mixed powder by an impactor (2) The axis is horizontal, one end is an end plate, and the other end is A cylindrical vessel body each closed with a lid plate is provided with a material input port and a material discharge port, and inside the vessel body is a box-shaped stirring rotor arranged concentrically with the vessel body, and further inside the stirring rotor, the axis line is set horizontally. A plurality of stirring elements are provided protruding from the outer periphery of the stirring rotor in close proximity to the cylindrical surface of the vessel body, and a plurality of impacting bodies and the impacting bodies are provided on the outer periphery of the stirring rotor. (3) A granulating device characterized by having a plurality of protruding pins extending outwardly and driving means for rotating the stirring rotor and the impact rotor at respective required rotational speeds. A granulation device according to claim (2), which is arranged concentrically with the cylindrical container and the stirring rotor.(4) A patent in which the rotational axis of the impact rotor is eccentric from the axis of the cylindrical container and the stirring rotor. Granulation device (5) according to claim (2) A patent in which the driving means for the stirring rotor is arranged outside one end of the cylindrical container, and the driving means for the impact rotor is arranged outside the other end of the cylindrical container. Granulation device (6) according to claim (2) Granulation device according to claim (1), in which the impact rotor and the stirring rotor are rotated in opposite directions (force protruding from the impact rotor) The granulating device (8) impact according to claim (2), wherein the impact body is a continuous plate-like body from one end of the rotor to the other end, and is provided on the rotor at equal positions on the circumference. The impact body protruding from the rotor is composed of a long plate-like body divided into a plurality of pieces in the axial direction of the rotor, and is arranged so that the material is moved in the axial direction of the rotor by rotation of the impact rotor. A granulating device (9) according to claim (2), wherein the impact body protruding from the impact rotor is provided in a spiral arrangement on the surface of the rotor (8)
Granulation apparatus 00) according to claim (7), wherein the impact body protruding from the impact rotor is tilted in a -helical direction with respect to the axis of the impact rotor and protrudes from the surface of the rotor. Granulation device (I)he Granulation according to claim (2), wherein the stirring element of the stirring rotor is tilted so that the material moving inside the container by the rotation of the rotor is moved in the opposite direction by the rotation of the stirring rotor. The impact body is arranged so that the rotation of the impact rotor moves the material in the container from the center in the axial direction of the container toward both sides, and the rotation of the stirring rotor moves the material in the opposite direction. The granulation device according to claim 0, which is provided with a stirring element, is arranged so that the material inside the container is moved in one direction along the axis of the container by rotation of the impact rotor, A granulation device according to claim (11), wherein a stirring element is provided so that the material is moved in the opposite direction by rotation of the granulator.