JPH0433956Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a separation device, and particularly to a separation device that utilizes centrifugal force.

[Prior Art and Problems to be Solved] Generally, when separating powder and granules containing a mixture of various sizes, centrifugal force is generally used to separate them. Dispersion as a pretreatment is important.

However, the current situation is that the desired product cannot be obtained due to insufficient dispersion, resulting in a decrease in efficiency.

The purpose of this invention is to solve the above-mentioned problems and provide a separation device that can reliably separate large and small objects and light and heavy objects.

[Means to solve the problem]

In order to achieve the above purpose, one end of a gas supply nozzle is provided on the outer peripheral surface of the vertically cylindrical main body, facing in the tangential direction, and the other end of the gas supply nozzle is expanded outward in a curved manner. The other end of the supply pipe, which can be filled with the powder or granules to be dispersed inside, is positioned with a slight gap between it and the other end of the gas supply nozzle, and this gap is maintained. In this state, the gas supply nozzle and the other end of the supply pipe are located inside a cylindrical gas reservoir with both ends closed, and a high-pressure gas supply pipe is connected to the gas reservoir, and the high-pressure gas supply When high-pressure gas is supplied into the gas reservoir through the pipe, the high-pressure gas flows through the gap and along the other curved end of the gas supply nozzle to generate a wall flow. It is.

[Effect]

By adopting the above method, when high-pressure gas flows in, the inner periphery of the supply nozzle becomes negative pressure, and the powder and granules filled in the supply nozzle are sucked and broken into pieces. The particles are thrown into the inside of the main body, and in this state, they are thrown into the inside of the cylindrical main body, and since this thrown state is in the tangential direction of the cylindrical main body, large particles and heavy particles are The outermost particles and the smaller and lighter particles will be located on the inner side to ensure separation.

〔Example〕

Embodiments of this invention shown in the drawings will be described below.

FIG. 1 is a schematic vertical cross-sectional view of the separating device according to this invention, and FIG. 2 is a view taken along the line -- in FIG. 1.

This separation device has a main body 1 whose upper part has a right cylindrical shape and whose lower part has an inverted conical shape with the diameter gradually decreasing. The upper opening of the collection container 3 is connected, and a thin tube 4 is concentrically connected to the upper part of the main body 1.
is provided.

One end of a gas supply nozzle 5 is connected to an arbitrary position on the upper part of the main body 1 while facing in the tangential direction thereof, and the other end of the gas supply nozzle 5 is curved and spread outward. .

One end of the supply pipe 6 is located with a slight gap 1 from the other end of the gas supply nozzle 5, and the upper end of the supply pipe 6 faces upward and the entire length is approximately L.
It is curved in the shape of a letter.

The other end of the gas supply nozzle 5 and one end of the supply pipe 6 are housed in a gas reservoir 7 having a cylindrical outer periphery with both ends closed, with a slight gap l between them, This gas pool 7
A high-pressure gas supply pipe 8 is connected to an arbitrary position on the circumferential surface.

Next, the operation of the above will be explained.

First, the inside of the supply pipe 6 is filled with powder 9 to be separated, and then high pressure gas is supplied to the inside of the gas reservoir 7 through the high pressure gas supply pipe 8. Since the other end of the supply nozzle 5 is curved, the gas flows into the interior of the gas supply nozzle 5 as an adhering flow along this curve.

In this case, the high-pressure gas flows in along the other curved end, creating a wall flow, resulting in the so-called Coanda effect, and the axial center of the gas supply nozzle 5 becomes under negative pressure.

Due to this negative pressure, the atmosphere is sucked in from the other end of the supply pipe 6, one end of which is located inside the gas reservoir 7, and at the same time, the powder or granular material that is the raw material to be separated is also sucked in, and the gas supply nozzle The powder and granules are subjected to a strong dispersion action inside the main body 1 and are thrown into the main body 1 along with the air flow in the tangential direction thereof, so that a swirling flow is generated inside the main body 1.

On the other hand, since the air inside the main body 1 is discharged through the thin tube 4 located in the upper part of the main body 1 at the axis, the swirling flow continues.

Therefore, as centrifugal force is generated by this swirling flow, large particles and heavy particles are separated to the outside, and small particles and light particles are separated to the inside.

Then, the separated powder and granules slide down the inverted conical part at the bottom of the main body 1 and are located in a separated state inside the collection container 3 connected to the bottom of the main body 1 via the connecting part 2. It turns out.

Therefore, inside the gas supply nozzle 5, due to the speed difference generated between the flow adhering to the inner wall of the gas supply nozzle 5 and the secondary gas flow to be sucked, that is, the air flow flowing in from the supply pipe 6. Therefore, the powder 9 is strongly dispersed and in this state is fed into the main body 1, which is the separation location, so that the particles constituting the powder are divided into large and heavy particles and small and light particles. can be efficiently separated.

In this case, in order to efficiently separate the particles, it is most important that each particle constituting the powder or granule material is separated, and if this is insufficient, efficient separation will not be possible. By utilizing the Coanda effect, it is possible to reliably break apart the particles that make up the powder and separate them inside the main body.

[Effect of idea]

Since this device is configured as described above, when high-pressure gas is supplied into the gas reservoir through the high-pressure gas supply pipe, the high-pressure gas passes through the gap between the supply pipe and the gas supply nozzle and flows onto the wall of the gas supply nozzle. As a result, the axial center of the gas supply nozzle becomes negative pressure, and the powder and granules inside the supply pipe are sucked together with air, causing the powder and granules to generate a strong force inside the gas supply nozzle. They are broken apart by dispersion, and in this broken state they are thrown into the main body, where they are separated by centrifugal force, so large and heavy particles are placed on the outside, while small and light particles are placed inside the main body. It has the advantage that the separation is reliably carried out on the inside, and the above-mentioned dispersion and separation effects can be performed simply by supplying high-pressure gas.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a separation device according to this invention, and FIG. 2 is a view taken along the - line in FIG. 1. 1...Main body, 2...Connection part, 3...Collection container,
4... thin tube, 5... gas supply nozzle, 6... supply pipe, 7... gas reservoir, 8... high pressure gas supply pipe,
9...Powder fluid, l...Gap.

Claims (1)

[Scope of utility model registration request] One end of a gas supply nozzle facing in the tangential direction is arranged on the outer circumferential surface of a vertically cylindrical main body, the other end of the gas supply nozzle is expanded outward in a curved shape, and is dispersed inward from one end. The other end of the supply pipe that can be filled with the powder or granular material to be filled is positioned with a slight gap between it and the other end of the gas supply nozzle, and while maintaining this gap, the gas supply nozzle is and the other end of the supply pipe are located inside a cylindrical gas reservoir with both ends closed, and a high-pressure gas supply pipe is connected to the gas reservoir, and the gas reservoir is connected to the gas reservoir through the high-pressure gas supply pipe. A separation device characterized in that when high-pressure gas is supplied into the interior, the high-pressure gas flows through the gap and along the other curved end of the gas supply nozzle to generate a wall flow.