JPS5949839A - Fluidized granulator - Google Patents

Abstract

PURPOSE:To form dense and homogeneous spherical particles by providing internally a rotary disc having a truncated circular cone shape in a fluidization chamber of a fluidized granulator and inducing cyclonic flow in fluidized layers. CONSTITUTION:The diameter of a fluidized chamber 1 at the part of height of 1/4-1/2 of the overall height from the bottom 8 surface is made larger than the diameters of the bottom 8 and the top part. A rotary disc 4 having a truncated circular cone shape is provided to a revolving shaft 15 erected at the centerline of the bottom 8. A prescribed amt. of powder and granules are charged into the chamber 1 and while hot air is fed from the bottom 8, the disc 4 is rotated and a binder soln. is sprayed from nozzles 17. A cyclonic flow is thus induced in the hot air and the powder and granules ascend while swirling and are acted by centrifugal forces by which the powder and granules are brought into impulsive contact with the inside wall surface of the chamber 1 and the inside and outside lateral surfaces of the disc 4 and are thus ground to dense spherical bodies. The disc 4 is rotated in a 200-1,000rpm range to maintain the impulsive contact power on the powder and granules to be constant.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluidized granulation device, and in particular, is characterized in that a truncated conical rotary plate is installed in a fluidized chamber and a swirling flow is generated in the fluidized bed. In the food industry, powder and granules are often granulated or coated on the granulated powder or granules. Kof'lF! Fluidized granulation Since a fluidized granulation device is used, does the fluidized granulation device have a perforated plate on the bottom? Does it have a stretched fluidization chamber and the powder to be processed is placed in this fluidization chamber? Pour the air over the perforated plate and blow up the powder to form a 7-flow■υ1 state.Is this a binder or a coating agent? It erupts. By the way, in the above-mentioned conventional fluidized granulator, the fluid movement of the granular material in the fluidization chamber is provided only by the upward airflow from the perforated plate and the jet field, so the granular material is sufficiently fluid. In the inner state, the microscopic density in the IP portion of the fluidized bed is not uniform, and there is a tendency for the powder particles to rise in the center 8S of the fluidized chamber and fall in the outer part. In such a fluidized granulator, the particles are generally only porous, light, and amorphous, and it is difficult to grind the beans uniformly.

Conventionally, in order to solve this kind of force problem, a rotating disk was installed on the bottom of the flow chamber (for example, in Japanese Patent Application Laid-Open No. 54-6297,
No. 8), a screen with a screw r installed indoors (for example, %
These methods improve the mixing state of powder and granules in the fluidized bed, and have the effect of reducing the variation in particle diameter. What are the disadvantages of being porous, light, and irregularly shaped? It was impossible to erase it.

The present invention solves the above-mentioned drawbacks of the conventional fluidized granulation device and makes it possible to obtain dense, spherical, and homogeneous particles. This creates a swirling flow in the fluidized bed, and the powder and granules move up while rotating in a spiral trajectory, so that the whole is processed uniformly, resulting in particles with small variations, and due to the centrifugal force at that time. Because they come into contact with the inner wall surface of the flow chamber and the inner and outer surfaces of the rotary plate, they become dense particles and become spherical. A detailed explanation will be given based on the illustrated embodiment 11. In the figure, reference numeral l is a flow chamber, 2 is a filter chamber, 3 is a hot air supply duct, and 4 is an exhaust 2 duct. The other parts of this device except the flow chamber are similar to those of this type, and the filter chamber 2 is equipped with a bag filter 5, and the bag filter has a shaking frame structure. 6 pieces gills
The bag is filled with 5 keshiniki at appropriate intervals. Similarly, although the section 1 is not shown, the filter chamber 2 is formed by dividing the section 1 into the section 1 or more.
If a bag filter is provided in each chamber and each bag filter is shaken in turn, there will be no need to stop the flow during shaking. There is a heater 7 in the duct that sends hot air through the valve.
The temperature of the hot air is adjusted depending on the type of binder or coating solvent to be sprayed onto the powder or granules. The flow chamber 1 is designed to generate a swirling flow in the fluidized bed, and the bottom surface 8 of the flow chamber 1 is as described in Patent No. 7, for example.
F14C dispersion plate mentioned in No. 05431 or patent application No. 1987-
No. 70152, the NFC fluidized bed is used. This thing has a large number of square-shaped fumaroles 9 formed at equal radial intervals in a donut-shaped area around it, excluding the central segment.Needless to say, these 9 fumaroles are identical. The hot air is opened in the direction of rotation of the fluidized bed, and the hot air is blown out along the fluidized bed, so that it swirls.
To explain this part in more detail, this part is composed of the same number of bottom members lO as the fumarole ports 9. In FIG. Similarly, it is bent in a waveform along the two radial fats passing through the central groove 7, and the downward slope 11 is bent.
It is divided into an elevated surface 12 and an overlapping surface 13. And the lower inclined surface 11 is the adjacent bottom member U? The overlapping surfaces 13' of the two are placed together with an appropriate distance between them.

Therefore, a slit will be created between the two people, and this will result in a jet of water.
09, and the hot air is +p li' from here. The surrounding wall surface U of the movable l, the central part to the lower part of the wall U' is the most swollen, and above that n, It gradually narrows towards the top. The flow chamber formed in this manner is provided with 14 rotating plates, each of which has a truncated conical shape and is connected to a rotating shaft 15 established on the center line of the flow chamber. There is. The rotating shaft 15 is the motor 1
6 and rotates at an appropriate speed. It is a spray nozzle numbered 17, which sprays a binder or coating agent solution' (pl value + = h) towards the powder particles swirling as a fluidized bed in the flow chamber 2. There are 18 protrusions for preventing stagnation, and since hot air swirls slowly near the center of the bottom surface 8, powder and granules are likely to stagnate in this Its portion, so -f:f'l is prevented. This is provided for the purpose of

Next, the functions of the one-creation particle device constructed as described above will be explained.

First, a predetermined amount of powder and granules are poured into the instant chamber 1, and hot air is blown from the bottom 8. While feeding, rotate it on the rotary plate 14',
Furthermore, a binder solution is jetted from the nozzle 17. Then, the hot air becomes a swirling flow in the fluidization chamber, so that the fluidized bed also becomes a swirling flow, and the powder material rises while swirling in the direction of arrow A.

Due to this, a centrifugal force acts on the powder and granules, so that the powder and granules come into contact with the inner wall surface of the flow chamber and the inner and outer surfaces of the rotating plate 14.
-In other words, the powder becomes dense and spherical due to this force. Of course, in this case, the circumferential velocity of the granular material contacting the inner surface of the rotating plate 14 is smaller than the circumferential velocity of the granular material touching the inner wall surface of the flow chamber l, so The direction and speed of rotation are adjusted appropriately (for example, from 200 to 11,000 r-p-) to keep the degree of contact between the powder and granules constant. Flow chamber l and rotating plate 14
Since the chamber is gradually narrowed upward, it compensates for the tendency that the swirling speed of the fluidized bed gradually slows down as the soil rises, and the centrifugal breakage of the powder and granules is kept constant, thereby strengthening the contact force against the wall surface. Once the powder and granules have risen, they flow into the flow chamber.
This makes it easier to descend by following the center 7.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention, and FIG. 2 is a partially exploded perspective view showing an example of a fluidized bed. 1: Flow room 8: Bottom surface 9: Fumarole port LO: Bottom member 14; Rotating disk 15: Rotating spider 116;
Ta 17: Spray nozzle 18; protrusion for preventing stagnation Fig. 1 of the patent applicant's agent] :”ii Fig. 2/8

Claims (1)

[Scope of Claims] Diameter i of the height part of the bottom surface and the total height of the raw material container of the fluidized granulation device equipped with a fluidized sound for generating a swirling flow in the fluidized bed; A truncated cone-shaped rotating disk that rotates at 200 to 1000 ppm in the same direction or in the opposite direction to the swirling flow is installed in a thick raw material container, and the swirling force of the powder and granules in the fluidized bed is... A fluidized granulation device characterized in that spherical particles are obtained by forcibly imparting rolling motion to powder and granules between a truncated conical rotating disk and a wall of a raw material container while accelerating the rotation.