JPS62132527A - Disperser of granule - Google Patents

Abstract

PURPOSE:To effectively disperse granule by providing plural introduction ports for the dispersed air streams wherein the dispersed air streams of granule are mutually rotated in the same direction to a rotation part discharging the dispersed air streams after rotating them. CONSTITUTION:A disperser is composed of a rotation part 1 and the feed mechanism 2, 2 for the dispersed air streams and plural e.g. two introduction ports 25 for the dispersed air streams are opened in a position symmetrical to an axis of the rotation part 1 in the inside peripheral face of the top of the rotating part 1. The high-pressure dispersed air streams of granule formed in the feed mechanisms 2, 2 for the dispersed air streams are introduced into the inside of the rotation part 1 via each introduction port 25, 25. Thereby since two introduction ports 25, 25 are provided so that the dispersed air streams are mutually rotated in the same direction, the deviation caused by the dispersed air streams introduced through one introduction port 25, is disturbed by the dispersed air streams introduced through the other introduction port 25. As a result, the concn. distribution of granule is uniformized in the direction along the circumferential direction of the rotation part 1.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a dispersion device for powder and granular materials.

[Prior art]

Conventionally, as a dispersion device for powder or granules, there has been known a device in which, for example, a dispersion airflow of powder or granules is swirled within a swirling section and then discharged into an empty conical shape from an opening for the swirling section for dispersion. It is being

[Problem that the invention seeks to solve]

However, in conventional powder and granule dispersion devices, the airflow for dispersing powder and granules is introduced into the swirling section from one point, so the powder and granules are dispersed in the direction along the inner circumference of the swirling section. l] causes a large bias in the distribution,
After the powder is discharged, the concentration distribution in the plane perpendicular to the central axis of rotation becomes non-uniform, and the powder is not dispersed well enough, resulting in a decrease in the yield of the powder dispersed in particles. There is a problem in that it is low.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to be able to sufficiently disperse powder and granules so that the concentration distribution in a plane perpendicular to the dispersion and discharge direction is uniform. Moreover, it is an object of the present invention to provide a dispersion device for powder and granular material with high dispersion efficiency.

[Means for solving problems]

The dispersion device for powder and granular material of the present invention includes a swirling section that swirls and then discharges a dispersion airflow of powder and granular material, and a swirling section that is provided so that each dispersion airflow of powder and granular material swirls in the same direction. ? It is characterized by having 3J number of distributed airflow inlets.

[For production]

According to such a device, the dispersion airflow of powder and granular material is introduced into the swirling section from multiple locations, and the dispersion airflow from the inlet port - is introduced into the swirling section from multiple locations.
Because of uniform swirling and mixing with the artificially dispersed airflow, the flow velocity distribution in the direction along the inner circumference of the swirling part and the concentration distribution of the powder and granular material become uniform, and as a result, the powder and granular material can be mixed well. Can be dispersed.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 are a partially cutaway front view and an explanatory cross-sectional view, respectively, showing essential parts of an embodiment of the dispersion apparatus of the present invention when viewed from below. This dispersion device basically consists of a swirling section 1 and a dispersion airflow supply mechanism 2 for supplying a dispersion airflow of powder to the swirling section 1. The rotating part 1 is
It has a cylindrical structure with a rotating part outlet 26 that opens downward, and on the inner circumferential surface of the upper part of the rotating part 1, there are holes arranged at approximately equal intervals along the inner circumference at symmetrical positions with respect to the axis of the rotating part 1. The two dispersed air flow inlets 25 are formed so that the dispersed air flows therefrom rotate in the same circumferential direction (counterclockwise in FIG. 2). A distributed airflow supply mechanism 2, 2 is connected to each.

Each distributed airflow supply mechanism 2 in the illustrated example includes a compressed air inlet 21, a powder supply section 22, and an ejector mixing chamber 23.
The compressed air from the compressed air inlet 21 is ejected into the ejector mixing chamber 23 and passes through the ejector throat section 24, and the suction force generated when the compressed air is ejected from the powder supply section 22. The powder P is fed little by little and mixed in the ejector mixing chamber 23, forming a high-pressure dispersion airflow of the powder. Note that the compressed air inlet 21 is configured to send air in the tangential direction of a circle centered on the axis of the swirling section 1 .

In the above configuration, each distributed airflow supply mechanism 2.
The high-pressure dispersion airflow of powder and granular material formed in step 2 is introduced into the swirling section 1 through each dispersion airflow introduction port 25, and swirls along the inner periphery of the swirling section 1 due to the pressure inside the swirling section 1. At this time, the powder and granular material is dispersed under high shearing force, and is then discharged from the swirling section outlet 26.

In the swirling section 1, a plurality of dispersed airflow inlets 25 are formed so that the dispersed airflows of the powder and granular material swirl in the same direction. The deviation that should be caused by this is disturbed by the dispersed airflow introduced from the other dispersed airflow introduction port 25. For example, the formation of a high concentration portion in the swirling portion l due to the dispersion airflow introduced from the - dispersion airflow introduction port 25 is suppressed by the force of the dispersion airflow from the other dispersion airflow introduction ports 25. As a result, in the direction along the circumferential direction of the rotating part l, 4 of the powder and granular material
The degree distribution is made uniform.

The positions of the plurality of dispersed air flow introduction ports 25 are preferably in a symmetrical relationship with respect to the axis of the swirling section 1, so that the powder and granular material is distributed in the inner circumferential direction of the entire space along the inner circumference of the swirling section 1. The concentration distribution can be made more uniform. As a result, it is possible to achieve sufficiently good dispersion of the powder and granules, thereby increasing the yield of primary particles. Since it can be processed, it is possible to increase the processing capacity and the yield of primary particles at the same time, and as a result, it is possible to achieve dispersion of powder and granular materials with extremely high efficiency.

3 and 4 respectively show other embodiments of the present invention, in which three distributed airflow inlets 25 are provided in the example shown in FIG. 3, and four distributed airflow inlets 25 are provided in the example shown in FIG. They are formed at symmetrical positions with respect to the axis, and a distributed airflow supply mechanism 2 is connected to each of them.

By forming a large number of dispersed air 2ii inlets in this way, it is possible to further improve the uniformity in the direction along the inner circumference of the swirling section 1, and it is possible to further increase the throughput.

FIGS. 5 and 6 show further embodiments of the present invention,
In this example, in addition to forming the plurality of dispersed airflow introduction ports 25 in the swirling portion 1 as described above, an obstacle is further provided below the swirling portion 1 so that the swirling dispersed airflow collides with it. The obstacles in this example are four powder/granular material spreading vanes 27, and each powder/granular material spreading vane 27 is located at a symmetrical position with respect to the axis of the rotating part 1 on the inner wall of the rotating part 1.
It is fixed in a state in which it protrudes inward in the radial direction of the rotating portion 1 and extends along the axial direction.

According to such a configuration, the airflow in which the powder particles are dispersed due to the swirling within the swirling section 1 further passes through the powder diffusion vanes 27.
, and the flow is disturbed so as to be diffused inward, so that the thickness of the air layer of the powder dispersion air flow flowing along the inner periphery of the swirling section 1 increases. As a result, the powder and granules are uniformly dispersed at a lower concentration, and the yield of primary particles of the powder and granules can be significantly improved.

In the case where an obstacle is provided as described above in the present invention, the obstacle is not particularly limited, but it is preferable to use a powder diffusion blade as in the illustrated example. However, its specific shape is not limited, and may be, for example, triangular, rectangular, trapezoidal, or other polygonal shapes, or may be curved. The number can also be arbitrarily selected.

〔Effect of the invention〕

The present invention includes a swirling part that swirls and then discharges a dispersion airflow of powder and granular material, and a plurality of dispersion airflow inlets provided in this swirling part so that the dispersion airflow of powder and granular material swirls in the same direction. Since this is a dispersion device for powder and granular material, it is possible to disperse the powder and granular material in a sufficiently good condition.
The yield of desired primary particles can be significantly improved,
In addition, the processing capacity is increased and powder particles can be dispersed with extremely high efficiency.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view for explaining an embodiment of the present invention, FIG. 2 is a cross-sectional view for explaining the apparatus shown in FIG. 1 viewed from below, and FIGS. FIG. 5 is an explanatory plan view of another embodiment of the invention, FIG. 5 is an explanatory partially cutaway front view of yet another embodiment of the invention, and FIG. 6 is an explanatory diagram of the apparatus of FIG. 5 as viewed from below. FIG. 1...Swivel part 2...Distributed airflow supply mechanism 2
1... Compressed air inlet 22... Powder supply section 23
... Ejector mixing chamber 24 ... Ejector throat section 25 ... Dispersion airflow inlet 26 ... Swivel section port 27
...Powder diffusion vane

Claims (1)

[Scope of Claims] 1) A swirling section that swirls and then discharges a dispersion airflow of powder and granules, and a plurality of dispersion airflows provided in this swirling section so that the dispersion airflows of powder and granular materials swirl in the same direction. A dispersion device for powder or granular material, characterized in that it has an inlet. 2) The apparatus for dispersing powder or granular material according to claim 1, characterized in that an obstacle is arranged in the swirling part so that the swirling dispersion airflow collides with it.