DE3333733A1 - Granulating apparatus - Google Patents

Abstract

The invention relates to a granulating apparatus having a horizontal cylindrical housing, which is sealed at its ends and which has a feed device for the material to be granulated and a discharge device for the granules, a cage rotor, which is concentrically rotatably arranged in the casing and which has mixing elements projecting close to the casing wall, an impact rotor, which essentially extends axially parallel into the cage rotor and which has impact webs projecting outwards from its outer periphery, as well as drive devices for the cage rotor and the impact rotor.

Description

DiPL.CHEM.bR: ^ j.ÄF £ ÄLQ.SJACH JJJJ 13

PATENT ADVOCATE
ADENAUERALLEE 3O 20OO HAMBURG 1 - TELEPHONE (040) 2445.23

File number; New registration

Applicant; Fuji Paudal Kabushiki Kaisha, Osaka

Granulating device

The invention relates to a wet type granulating device for the production of finely divided granules of uniform particle size by adding water or a binder solution to ground materials or materials mixed from several components in powder form.

For such wet granulations usually different Process used, including the spray granulation process, in which the granules are sprayed on by a solution the granulated material and subsequent drying are produced, the air bed granulation process, in which powdery granulation material soaked through when flowing over a porous plate to enlarge the particles and subsequently to granules

ORIGINAL INSPECTED

COPY J

. 5.

is dried, the Brech-Granulierverfahreη, in which powdery granulated material mixed with water and kneaded into granules in a crushing granulation machine broken and, after drying, sifted and classified, as well as the agitation granulation process, in which powdery granulated material is entered into a container, in which it is added with a suitable Solution is mixed and granulated by cutting blades rotating at high speed.

However, these known processes produce granules with a very broad particle size distribution, so that the yield of a certain desired particle size is limited to 50% or less. This low efficiency allows a standardization of the particle sizes only with great effort.

From Japanese patent 57-56369 - * - ^{st e} i ^ne mixing and kneading machine is known, which is used for mixing, kneading and emulsifying wheat flour, rye-containing flour, wheat-containing flour, baking mixes for cakes and biscuits, etc.

suitable is. In this known device, a scraper for scraping off the kneaded powder is in contact with the inner circumferential surface one with a horizontal Axis arranged drum and can be rotated by a rotating arm therein, whereby the speed of rotation, however with between 10 and 60 revolutions per minute is very low. A variety of mixing and kneading blades are in equidistant from an eccentrically arranged in the drum, horizontally extending shaft. However, the peripheral speed of the kneading blades is between 75Ο Ι8ΟΟ RPM as well

In contrast, the invention relates to the production of fine

copy

/ YY

finely divided granules of uniformly composed Powders.

The object of the invention is to provide a Uranuliervorricbtung the initially penannι on type to switch from a disperse powdery phase and water or one with Lellösuag in high yield of, for example, $ 90> a / one-part granulate provides largely uniform particle size.

To solve this problem, the granulating device of the type mentioned is according to the invention with the in the characterizing Part of claim 1 specified features equipped.

The granulating device that is simple and inexpensive to construct has the advantage that repeated mixing, stirring, granulating, breaking and classifying processes result in the granulated material with particle sizes determined essentially by the speed of rotation of the impact rotor, wherein the particle size depending on the quality and physical properties of the powder material, the The amount and type of liquid binder, etc., can vary. Particularly large or small particles only fall into small amounts of. The finely divided granules are produced in short processing times with a very high degree of efficiency. By suitable choice of the rotational speed of the impact rotor or the rotational speed ratio of impact rotor and cage rotor as well as by observing the physical properties of the powder material of the binder and the liquids used, the degree of mixing, etc. can produce granules with any desired particle size range can be obtained, for example, with particle diameters between 0.1 and 0.7 mm. A desired Particle size can be selected in yield and by setting the speed and operating time of the impact rotor

ORIGINAL INSPECTED

COPY \

It demonstrate: Fig . 1 Fig . 2 Fig . 3

Bulk density can be obtained.

Advantageous further refinements of the granulating device are described in the subclaims 2 to 9.

Preferred embodiments of the granulating device are described below further explained with reference to the accompanying drawings.

a longitudinal section of a first embodiment the granulator; FIG. 2 shows a cross section of the granulating device in FIG

Fig. 1;

a sectional view of the slowly rotating cage rotor of the granulating device shown in FIG. 1;

Fig. '+ A perspective view of the rapidly rotating Impact rotor of the granulator; Figure 5a

to 5c perspective views of modified impact rotors;

6 shows a longitudinal section of a second embodiment

the granulator; 7 shows a cross section of the granulating device in FIG

Fig. 6 and
Fig. 8,

9 and 10 test results with regard to the particle size, the yield and the bulk density according to the invention produced granules.

1 and 2 show a granulating device with a cylindrical housing 1 arranged with a horizontal axis, the axial ends of which are closed by an end plate 2 and a closure plate 3 lying on top of these. in the upper portion of the cylindrical housing 1 is a

copy]

I OO

-'ir- '

■ Ζ

Granuliergut filling port k and the lower BerRich thereof has a granule discharge port 6 is provided, which can be opened by a closing part 5 alterna '^"1 or closed. Diei shutter plate 3 is set for washing and cleaning of the interior of the housing releasably attached to the cylindrical housing 1. The Granuliergut Filling opening 4 is provided with a slide 7 which can be closed during the granulation, as shown in Fig. 2. Furthermore, a filling funnel 8 for supplying the granulated material and an actuating rod 9 for optionally opening and closing the closing part 5 of the outlet opening 6 are provided by means of a mechanism not shown is provided.

In the cylindrical housing 1 are a cage rotor 10 with stirring elements 14 and a beater rotor 11 near the axis intended.

As FIG. 3 shows in more detail, the squirrel cage rotor 10 has essentially the shape of a on the outer surface of a Disc 13 arranged on the cage. The disk 13 is connected to the end of a first drive shaft 12. Several traverse-like stirring elements 14 protrude from the outer circumference of the cage rotor 10 to near the cylindrical inner wall of the housing 1.

As FIG. 3 shows, the stirring elements 14 are inclined towards the axis of the cage rotor 10, so that when it is rotated in the direction of the arrow A, the granulated material in the cylindrical housing 1 in the axial direction according to the arrows a and a ¹ from the axially opposite end regions of the Housing 1 is promoted to the middle section. The stirring elements 1Λ provided at opposite ends of the cage rotor 10 have scrapers 15 which, when the cage rotor 10 rotates, strip off powder material adhering to the end plate 2 or the closure plate 3.

ORIGINAL INSPECTED

■ 9 ·

The first drive shaft 12 is, for example, with a diameter of the cylindrical housing of 205 mm by one in a holding frame on the end plate 2 in one
Camp. 16 rotatably mounted chain drive (from the
only one sprocket 17 is shown) rotated at speeds of between 10 and 50 rpm.

Striking webs 18 are identical on the impact rotor 11
Circumferential distances arranged, which are formed over the entire length of the impact rotor radially outwardly extending elongated plate elements. For example, if the diameter of the cylindrical housing 1 is 205 mm, the impact rotor 11 has a diameter of 58 mm, the height of the impact webs

18 is 9 mm. The impact rotor 11 is supported by a bearing in a frame area of the closure plate 3 i * ¹

19 rotatably mounted second drive shaft 20 with
3,000 to 8,000 rpm in the direction of arrow B in FIG. 2
twisted. A is used to drive the impact rotor 11
Motor 21, the speed of which can be changed by means of an inverter (frequency converter). Instead of this

can also be a motor with a gearbox or a variable speed motor can be used for this.

With the h shown in Fig. Percussion webs 18 of the impact rotor 11 can b the Granuliergut in the cylindrical housing 1 in one of the directions of arrow b or promoted ¹ or
also from the central region of the housing 1 to its axial
opposite ends are conveyed, as the arrow b - b ¹ shows, in ^ odem the impact rotor 11 is rotated in the direction of the arrow B with simultaneous rotation of the cage rotor 10.

As FIG. 5a shows, the striking webs in FIG. K can be modified into striking webs 18a, each in the form of only a part of the total length of the striking rotor

[Copy

O 3 ο ο ι ο ο

constituting plate element are executed. In this case, too, it is possible to place the granulated material in a

j of the arrow directions b or b ¹ or in both directions

jb - b ¹ with a corresponding rotation of the cage rotor 10

j 5 to promote. '

Fig. 5 ^ · shows modified striking webs 18b, each ! are inclined with respect to the axis of the impact rotor 11,

j As a result of this inclination, the material to be granulated can be moved in direction b

j or with the opposite inclination in direction b

j. 10 are promoted in the opposite direction. When the striking webs 18b each, from the central area, in

Side view are inclined symmetrical relationship to each other, the granulated material can from the central area to both opposite ends are promoted.

The striking webs 18c shown in FIG. 5 ° are of reduced length and arranged in a spiral shape S in a symmetrical relationship to one another in a side view. By rotating the impact rotor 11 in the direction of arrow B, the granulated material in the housing ^{1 is} conveyed in both directions b - b 1, as FIG. H shows.

The granulating device further comprises, as in FIG and Fig. 2 show a liquid spray head 22 for delivery from water or other liquids to powdery Granulated material. Any desired type of spray head can be used for this purpose, for example

those that spray water or those that can deliver a large amount of liquid very quickly. A frame 23 is used to hold the cylindrical housing 1,

6 and 7 show a second embodiment of the

Granulating device in which the horizontally aligned axis of rotation of a beater rotor 31 is below the axis

ORIGiNAL INSPECTED

COPY]

. AA -

of the cylindrical housing 1 and the cage rotor 10 are arranged is. In FIGS. 6 and 7 and 1 and 2, the same parts are provided with the same reference numerals.

When the impact rotor 31 is arranged eccentrically as described is, the stirring and forced flow of the granulated material is increased. Furthermore, such an arrangement to be preferred for processing smaller amounts of granulated material. The crushing action of the striking webs 38 the impact rotor 31 on particularly large particles is advantageous enlarged.

Although in the described embodiments of the Käfigbzw. 31 rotor 10 and the beater rotor 11K with opposite directions of rotation can be driven in order to increase their relative speed of rotation, the granulating device

or 31 can be modified in such a way that the impact rotor 11 seconds the cage rotor 10 are driven in the same direction of rotation. The striking webs 18, 18a to c, 38 can, for Example are designed as hammer heads.

With the described structure of the granulating device

or 31

the cage rotor 10 and the impact rotor 11J / each with lower or, driven at high speed while different or similar powdery materials are under Adding suitable amounts of binder are entered into the housing 1. During an operating time of the granulating device from a few 10 seconds to a few minutes, the materials are thoroughly mixed and with promotion in the axial direction of the housing 1 by the action of the impact webs 18, I8a-c, 38 of the impact rotor 11, 31 and the stirring elements 14 of the cage rotor 10 to one stirred uniform dispersion.

By adding an appropriate amount of water or a

COPY]

\ -la ·

other liquid by means of the spray head 22
with continuous rotation of the rotors 10 and 11 or 31, fine-particle granules of the desired particle / trench distribution are produced.

In the following, el.; further explained.

If water or the like is supplied to the powdery material sufficiently mixed in the cylindrical housing 1
Granuliergut agglomerates this, with the liquid

serves as a growth seed, creating a mixture of

Liquid and powder in the form of wet crumbs (moxa) are created. As shown in FIGS. 2 and 7, when the cage rotor 10 rotates in the direction of arrow A, this mixture becomes
conveyed upwards by the stirring elements 14 from the lower region of the housing 1 and then falls onto the impact rotor "M or 31.

The mixture collides with the at high speed rotating striking webs 18, I8a-c, 38 and is supported by these broken and centrifugally thrown away, whereupon it

again by the stirring elements Ik to fall again on the

or 31
Impact rotor 11 ^ is promoted upwards. This will be

Granuliergut in the cylindrical housing 1 with the rotational speeds of the rotors 10 and 11 or 31 and the
Arrangement of the stirring elements 1 k of the striking webs "°" ^Λ speaking speed axially moved and subjected to a mixing and guiding action. The small particles grow up to certain sizes in the form of a liquid-wet mixture, with excessively large particles through

their own weight on the top of the impact rotor

or 31
11 ■ / fall and hit the striking webs 18, 18a-c, 38, while small particles are blown away by an air flow generated by the striking webs 18, I8a-c, 38 rotating at high speed and thus not directly onto the striking webs 18, I8a-c, 38 bounce.

ORIGINAL INSPECTED

COPY]

. 4Z-

As described above, the rotation of the cage rotor 10 moves the powdery granulated material as well as the wet mixture, which have collected in the lower area of the housing 1 and thus causes particle growth according to the degree of moisture as well as the transport to the upper housing area

or? 1 for the fall on the impact rotor 1 Λ \ Γ On the other hand, the

or 31 rotating impact rotor 11K die from the upper part of the cylindrical housing 1 falling mixture by means of the striking webs 18, I8a-c, 38 and thus forms the granulate borrowed with the desired diameter. Since particles with smaller than the desired diameter continue through the through the rotation of the striking webs 18, I8a-c, 38 generated air flow are blown away and not broken, a classification of the particles is also achieved.

Figs. 8, 9 and 10 show results of experiments with pharmaceutical preparations. The materials used was; 60% lactose (0.5 kg / l), $ 30 corn starch (0.38 kg / l), 10% crystalline cellulose (trade name) (0.3 kg / l), manufactured by Asahi Chemical Industry Co., Ltd.} Binder (PVA) 3% aqueous solution, 25% D.B.

The materials were processed in quantities of 2 liters, the mixing time in the dry state was two minutes,

the liquid was fed over 30 seconds. The ~ j

The granulator had a housing diameter of j

205 mm and a diameter of the impact rotor of 58 ram at j

9 mm high beater bars, the beater rotor was with the j

Cage rotor arranged concentrically. '<

As Fig. 8 shows, with the same granulation time, the average milk diameter is at ^ ÖVoOO RPM is smaller, while, Fig. 9 shows the yield of particles between 0.1 and 0.5 mm with the granulation time and the speed of the impact rotor changes. Fig. 10 shows that the bulk fibers V of the granulated particles with the granulation time and

COPY

* - Yf-

Speed changes.

or 31
jihli

Since the impact rotor 11j / including the impact webs 18, 18a-c, 38 provided thereon has a maximum diameter of 76 mm, the starting torque of its drive motor is advantageously not excessive , even when speeds of 100,000 rpm are reached.

or at the same time ensures the impact rotor 11/31 a

sufficiently uniform moisture penetration.

ORIGINAL INSPECTED

Claims (9)

DiPL-CHEM-DK.jH ^ -RAtDiSTACH 0 0 0 0/0 0 '"' P-ATENYaNWALT ** ADENAUERALLEE 30 · 20OO HAMBURG 1 · TELEFON (040) 244523 File number; new registration applicant Fuji Paudal Kabushifci Kaisha, Osaka PATENT CLAIMS 1) Granulating device with a lying cylindrical housing (i) closed at the ends with a granulate filling device (^, 7 »8) and a granulate outlet device (5» 6,9) ι a cage rotor (1O ) with stirring elements (14) protruding close to the housing wall, an impact rotor (11,31) extending essentially axially parallel into the cage rotor (10) with impact webs (i8, i8a-c, 38 ) projecting outward from its outer circumference and drive devices (12, 17,20,21) for the cage rotor (1O) and the impact rotor (11,31). ORIGINAL INSPECTED COPY 2) granulating device according to claim 1, characterized in that that the impact rotor {11) is concentric with the cylindrical housing (i) and the cage rotor (1O) is arranged. 3) granulating device according to claim 1, characterized in that the impact rotor (31) with to the axes of the cylindrical housing (i) and the cage rotor (1O) eccentric axis of rotation is arranged. h) granulating device according to one of claims 1 to 3 »characterized in that the drive device (i2,17) of the cage rotor (1O) and the drive device (20,21) of the impact rotor (1 1, 31) each outside of the opposite axial end faces of the cylindrical housing (i) are arranged. 5) granulating device according to one of claims 1 to 4, characterized in that the cage rotor (1O) and the impact rotor (ii) for rotation in opposite directions Directions of rotation are designed. 6) granulating device according to one of claims 1 to 5t characterized in that the striking webs (18,38) of the striking rotor (11,31) as spread over its total Length extending plate members are formed and are arranged at equal circumferential intervals. 7) granulating device according to one of claims 1 to 5i characterized in that the striking webs (18, 38) as extending over only part of the length of the striking rotor (11,31) formed and extending plate elements ¹ COPY 'ORIGINAL INSPECTED on this for the axial conveyance of the material to be granulated are arranged at its rotation. 8) Granulating device according to claim 6 or 7 »thereby marked that the striking webs (18,38) are spiral-shaped obliquely to the axis of the impact rotor (11,31) on its Outer peripheral surface are arranged. 9) Granulating device according to one of the preceding claims, characterized in that the stirring elements (1 ^) of the cage rotor (1O) for conveying the granulated material in the conveying direction caused by the impact rotor (11,31) opposite direction to the axis of the cage rotor (1O) are arranged inclined are. copy '