JPH02149333A - Apparatus for manufacturing spherical granules of oil material using organic solution as refrigerant - Google Patents

Abstract

PURPOSE:To prevent dropping granules from coagulating by forming a swirl in a horizontal direction in the surface of the cooling liquid by stirring fan at the time of cooling and solidifying granules of a molten oil material in the inside of concentric double cylinders. CONSTITUTION:Granules of a molten oil material are dropped to a cooling liquid in the inside of an inner cylinder 2 of inner and outer double cylinders 1, 2 and solidified while descending to form granular powder. A stirring fan 18 rotatable in a rotating frequency enough to produce a swirl of the cooling liquid in the horizontal direction is installed near surface area of the cooling liquid in the inside of the cylinder 2 to which the molten oil material is dropped. As a result, dropping granules are prevented from colliding an coagulating with other granules and spherical granules of the oil material are continuously and efficiently manufactured.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an apparatus for producing spherical powder of an oily substance suitable for manufacturing and processing pharmaceuticals, foods, feeds, and industrial materials such as catalysts and carbon. It is something.

(Prior art) As an apparatus for manufacturing spherical powder, the Japanese Patent Publication No. 51-88
Some of these are disclosed in Japanese Patent Publication No. 75 and Japanese Patent Publication No. 60-2904.

The former consists of a cooling section consisting of a concentric double cylinder and a recovery section having an inverted U-shaped tube, and the liquid encapsulated material is collected from a double nozzle installed downward in the inner cylinder at the top of the cooling section. The particles produced by extruding the capsule filling material into the cooling liquid in the inner cylinder as a composite jet stream, and performing a granulation action while descending in the inner cylinder together with the cooling liquid to form powder and granules. The liquid is sent from the lower part of the cooler to the recovery section, and the powder and granules are separated and recovered from the liquid using a sieve.

The latter one consists of a capsule reaction tank and collection tank;
It is characterized by using a separator in which a screw conhair is installed in a perforated cylinder in the recovery tank.

(Problem to be Solved by the Invention) The former method described above is effective for materials that harden slowly, such as gelatin, but when producing particles of oily substances, the tip of the nozzle must be A problem arises in that the oily substance solidifies and blocks the nozzle when placed in the coolant.

In addition, when the nozzle is installed above the liquid level, there is a drawback that the particles that fall first collide with the particles that come later and agglomerate.

The latter method has the disadvantage that, because the cooling liquid near the nozzle is not sufficiently rectified, the dropped particles collide with other particles near the liquid surface and agglomerate.

Therefore, when producing particles of an oily substance, it is very difficult to obtain particles with a desired particle size and shape by using this apparatus.

Therefore, the purpose of the present invention is to obtain an apparatus for producing spherical powder of an oily substance using an organic solution as a refrigerant, in which dropped particles do not collide with other particles and agglomerate. be.

(Means for Solving the Problems) In order to achieve the above objects, the present invention provides an apparatus having the following configuration.

That is, the molten oily substance is dropped into a cooling liquid in an inner cylinder consisting of an inner and outer heavy cylinder, and the molten oily substance is dropped in a device that solidifies and forms powder while falling. A spherical powder of an oily substance is produced using an organic solution as a refrigerant, characterized in that stirring blades with a variable rotation speed are installed near the cooling liquid surface in an inner cylinder to generate a horizontal swirling flow of the cooling liquid. It is a device.

(Function) Particles made of an oily substance heated in a solvent are cooled and solidified by an organic solution in a concentric double cylinder, but since a horizontal swirling flow is generated on the surface of the cooling liquid by the stirring blade, the particles drop. particles that do not clump together.

(Example) The embodiments shown in the drawings will be described below.

In the present invention, in order to efficiently produce spherical powder, an organic solution is used as a refrigerant, and the molten oily substance is one selected from the group consisting of oils and fats, waxes, and resins. Or use a mixture.

In addition, the particles of the molten oil-based substance are in the form of a single particle, a capsule with a core, or a particle consisting of an emulsion or dispersion. When an organic solution is used as a refrigerant, A single-component or multi-component organic liquid or an aqueous solution thereof having a specific gravity smaller than or almost equal to the specific gravity of the substance and exhibiting a sufficiently large interfacial tension with respect to the oily substance is used.

Next, we will explain the apparatus for producing spherical powder using the above-mentioned oil-based substance and organic solution.
The manufacturing process for 0 μm to 5 mm is as shown in Figure 1, which consists of a cooling section and a recovery section. The cooling section consists of concentric double cylinders (1) and (2), and the lower end of the inner cylinder (2) is A curing tank (3) is formed by opening in a horn shape and attaching its outer peripheral edge to an outer cylinder (1). A recovery section is formed from the curing tank (3) via a U-shaped recovery pipe (4). The recovery section has an outer cylinder (5) connected to a recovery pipe (4), and the upper part of the outer cylinder (5) passes through a recovery tank (6) to form a recovery tower.

A screw conveyor (7) is installed inside the outer cylinder (5), and numerous holes (
A particle take-out gutter (9) having a particle take-out gutter (9) formed therein is tilted downward, and the lower end of the take-out gutter (9) faces the product tank (10).

In the illustrated example, one end of the screw of the screw conveyor (7) protrudes above the take-out gutter (9), and the motor (1)
1).

The recovery tank (6) is connected to a recovery liquid pipe (12), and this recovery liquid pipe (12) is connected to a heat exchanger (14) that controls the temperature of the cooling liquid at a constant level via a variable flow rate pump (13). The water is connected to the outer cylinder (1) of the cooling section through a return pipe (15).

Now, from the multiple nozzle or single nozzle (16) to the inner cylinder (2
) Drop the oily substance or the encapsulating substance and the capsule filling substance into the cooling liquid.

Then, the granules are granulated while descending in the inner cylinder, and the granulated material passes through the U-shaped pipe (4) and ascends on the screw conveyor (7) in the outer cylinder (5). (7), the particles are lifted out of the liquid and pop out onto the particle extraction gutter (9). The liquid sent to the particle extraction gutter (9) is collected from the hole (8) into the recovery tank (6), passes through the recovery liquid pipe (12), is cooled by the heat exchanger (14), and is sent to the return pipe (15). ) into the cooling liquid of the outer cylinder (1). The liquid circulation as described above is performed by a variable flow rate pump (13).

The present invention produces a swirling flow of the cooling liquid in the horizontal direction near the cooling liquid surface of the inner cylinder where the oily substance or the encapsulating substance and the capsule filler are dropped using a single nozzle or multiple nozzles. It is equipped with a stirring blade (18) whose rotation speed is variable.

As shown in Fig. 2, the cooling liquid enters from the liquid inlet (17) of the return pipe (15) provided at a predetermined position of the outer cylinder (1), flows upward between the inner and outer cylinders, and flows upwardly into the inner cylinder (2). Flow inside. A stirring blade (18) fixed to a rotating shaft (19) faces the upper end of the inner cylinder (2), and is rotated using a motor (20) to generate a horizontal swirling flow near the coolant surface.

Particles of an oily substance made of heated and melted oily substance are dropped from above the surface of the coolant. The particles that have fallen into the cooling liquid are quickly moved horizontally in a swirling flow by the stirring blade (18) and settle down.

The particles cool and solidify while settling in the cooling liquid, forming an outer cylinder (1
) flows out along with the cooling liquid toward the U-shaped tube (4).

As described above, the coolant separated and recovered from the particles in the recovery tank (6) is sent to the heat exchanger by the pump (13), temperature-adjusted, and then returned to the liquid inlet (17) of the cooling section.

The height of the liquid level in the cooling section is adjusted by changing the flow rate of the pump (13).

Although the flow rate can be adjusted by rotating the screw conveyor (7), the liquid level may or may not be adjusted by overflow.

Furthermore, if the nozzle is submerged in the liquid in the inner cylinder, the oily substance will solidify and block the nozzle, so the nozzle is arranged above the liquid level.

The one shown in FIG. 3 is used for small particles with a particle size of 500 μm or less, and is constructed by providing a separator at the lower end of a curing tank (3).

(19) is a particle extraction gutter with a sieve formed thereon, and is connected to the product tank (10), which is the same as in Fig. 1, but the flow rate control valve (20) is connected to the particle extraction gutter (19).
) above the pump (13) and heat exchanger (14).
There is also a flow control valve (21) between the two.

However, if the pump (13) is a variable flow rate pump, there is no need for a flow rate control valve.

(Effects of the Invention) According to the present invention, since a horizontal swirling flow is generated by the stirring blades on the liquid surface in the inner cylinder onto which the oily substance is dropped, the dropped particles do not aggregate with each other.

In general, the flow condition of the coolant greatly affects the diameter and shape of the particles, so rectifying the coolant is important, but in Honmeimei, the flow near the coolant surface is adjusted by changing the shape and rotation speed of the stirring blade. You can also.

Therefore, according to the present invention, it is possible not only to prevent particle agglomeration but also to control the flow of the cooling liquid to produce particles with a predetermined diameter and shape.

In any case, according to the apparatus of the present invention, spherical powder of oily substances can be produced continuously and efficiently.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the ice chamber apparatus according to the first embodiment; Figure 2 (a) and (b) are explanatory diagrams of the part with stirring blades, FIG. 3 is a schematic diagram of the ice chamber apparatus according to the second embodiment. (1)・・・Outer cylinder (2) Inner cylinder (6)・・・Recovery tank (10)・・・Product tank (12)・・・Collection liquid pipe (13)・・・Pump (14)・・・Heat exchanger (16)・・・Nozzle (18)・・・Stirring blade

Claims (1)

[Claims] An inner cylinder into which the molten oily substance is dripped, in a device in which particles of the molten oily substance are dropped into a cooling liquid in an inner cylinder consisting of an inner and outer double cylinder, and solidified as they fall to form powder. An apparatus for producing spherical powder of an oil-based substance using an organic solution as a refrigerant, characterized in that a stirring blade with a variable rotation speed is installed near the surface of the cooling liquid to generate a swirling flow of the cooling liquid in the horizontal direction. .