JP2522360Y2 - Separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a separation apparatus for classifying solid particles with a high-pressure jet.

[Prior Art] As this type of air classifier, there is known an air classifier that separates particles according to particle size and density from equilibrium conditions between centrifugal force and gas resistance by a cyclone.

[Problems to be solved by the invention]

However, the above-mentioned conventional one completely separates the aggregated particles in the supplied raw material particles, and reliably separates and collects only homogeneous desired particles. Separation was inefficient.

In view of the above-mentioned problems of the prior art,
In order to solve this, the raw material can be supplied to the separation chamber of the centrifugal force field in a completely dispersed state, and a uniform product can be obtained by forming a stable centrifugal force field. An object of the present invention is to provide a separation device capable of efficiently separating particles having various particle sizes with high accuracy.

[Means for solving the problem]

As a means for achieving this, the present invention provides a raw material supply unit in the upper part, a gas supply port for forming a centrifugal force field in the lower part, and a fine particle recovery pipe in the center of the lower part. The gas in the main body is circulated and supplied into the main body from the gas supply port through the recovery device to the pipe, the supply of the gas is adjustable, and the pressure forming the centrifugal force field in the main body is changed. Things.

〔Example〕

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

The main body 1 has an inner wall surface 2 having a lower portion formed into a conical portion 3 and an upper portion formed into a cylindrical straight body portion 4. The upper end is covered with a top plate 5 to form a separation chamber 6.

The raw material supply unit 7 is provided on the top plate 5 and has a receiving cylinder 8 at an upper part thereof.
At the lower part, there is a jet pipe 9 opening to the separation chamber 6, and a high-pressure gas jet part 10 is formed by providing a small gap e at the connection between the receiving cylinder 8 and the jet pipe 9, and the outer periphery thereof is covered by a jacket 12. A high-pressure gas supply port 13 for supplying high-pressure gas, such as gas or air, is attached to a part of the housing which is enclosed and sealed. The narrow gap e of the high-pressure gas jet section 10 is formed by an arc-shaped curved wall surface 11 which causes a Coanda effect.
Formed.

As shown in FIG. 3, the gas supply port 14 is provided so as to open in a tangential direction with the inner wall surface 2 of the straight body portion 4 of the separation chamber 6 so as to inject the gas A. To form a centrifugal force field.

The fine particle collection pipe 15 is formed by an L-shaped pipe, and is erected at the center of the separation chamber 6 from the lower conical part 3 toward the top plate 5, and the suction port 16 at the upper end is opened below the gas supply port 14. The lower end protrudes from the side of the main body 1 and is connected to a back filter 18 of a collecting device described later to collect the fine particles C.

The coarse particle storage container 17 is attached to the lower end of the conical portion 3 of the separation chamber 6, and is configured to collect the coarse particles D.

The back filter 18, which is a recovery device, has a fine powder discharge port
19, which is connected to the particulate collection pipe 15 by a conduit 20, and is connected to a suction port 23a of a blower 23 by a conduit 22 via a suction valve 21 for adjusting the air volume.

The blower 23 has a constant air volume characteristic, a branch pipe 24 is attached to its discharge port 23b, one of which is opened to the atmosphere via a valve 25 for in-system adjustment, and the other is opened via a valve 26 for flow rate adjustment. A circulation line is provided by providing a conduit 27 connected to the gas supply port 14 of the separator body 1.

A pressure gauge is attached to each of the gas supply ports 14 of the branch pipe 24 and the conduit 27, and measures the pressures P ₁ and P ₂ at these portions.

Further, an air flow meter 28 is attached to the high-pressure gas supply port 13,
The air volume of the high-pressure gas E is measured.

With such a configuration, the raw material B is supplied from the receiving cylinder 8 of the raw material supply unit 7 and the high-pressure gas E is jetted from the gap e to the jet pipe 9. Coanda effect The gas jet q ₀ in order to jet become deposited on the wall flow along the wall surface 11 which is curved in an arc shape, the raw material B in the receiving tube 8 and this portion becomes a negative pressure to mass sucked with the secondary gas q ₁ And a high-speed airflow is formed in the ejection pipe 9 together with the high-pressure gas E. As a result, the raw material B undergoes a strong airflow dispersing action and is diffused and ejected into the separation chamber 6. Separation chamber 6 has inner wall 2 from gas supply port 14
Circulation for gas flow Q ₂ of the gas A centrifugal force field is formed within the separation chamber 6 and flows in a swirl flow, large particles and the specific gravity of the particles of the spread jet from the injection pipe 9 material B to Large particles move to the outer periphery and descend the conical part 3,
Only the coarse particles D are collected in the lower coarse particle storage container 17. On the other hand, the small and light particles are deflected to the inside and introduced into the back filter 18 through the fine particle collecting pipe 15 and the conduit 20 from the suction port 16, where they are separated from the gas and the fine particles C are collected from the fine powder discharge port 19. The other separated gas returns to the suction port 23a of the blower 23 through the conduit 22. This suction port 23a
The gas flow Q ₀ (Q ₀ = Q ₁ + q ₀ + q ₁ + q) from the discharge port 23b in order to inhale a new replenishment gas q ₂ from the suction valve 21.
₂ ) is discharged, but when the released gas Q ₁ (Q ₁ = q ₀ + q ₁ + q ₂ ) is released to the atmosphere by opening and closing the valve 25, Q ₀ −Q ₁ = Q ₂
There is supplied to the gas supply port 14 from the conduit 27 as the circulating gas Q _2.

Therefore, the gas flow from the blower 23 having the constant air volume characteristic
Since the Q ₀ tube static pressure P ₁ of the branch pipe 24 is changed by adjusting the opening operation of the valve 25, also the pressure P ₂ of the circulating gas Q ₂ of the separator main body 1 of the gas supply port 14 changes, the valve 25 pressure P ₁ increases the Filter, higher pressure P ₂ of the circulating gas Q _2, separation chamber 6 inner pressure increases, less suction air amount of the secondary gas q ₁ from the receiving cylinder 8 by back pressure resistance becomes, since the gas flow Q ₂ is increased, the centrifugal force field increases, separated into smaller diameter particles.
Conversely, if the opening of the valve 25 is increased, the pressure of the circulating gas Q ₂
P ₂ decreases, and conversely, the gas flow Q ₂ decreases, and the centrifugal force field in the separation chamber 6 weakens and is separated into large particles. If the pressure is constantly maintained, the raw material can be separated into uniform particles. If the opening degree of the valve 25 is changed, particles of various particle sizes can be separated.

[Effect of the invention]

As described above, in detail, the present invention,
The supply gas from the gas supply port for forming the centrifugal force field in the separation chamber is formed in the circulation supply circuit that returns from the separation chamber to the gas supply port via the recovery device, and controls the gas amount of this circulation supply circuit By doing so, the pressure in the separation chamber is adjusted and the centrifugal force field is always kept constant, so that the raw material can be separated into uniform particles. The raw material supplied at the same time is reliably separated from the aggregated state in the particles by the powerful high-speed gas flow dispersing action in the separation chamber, so that high-precision separation can be performed more efficiently.

Further, the centrifugal force in the separation chamber can be changed by changing the set value of the supply pressure of the circulating gas according to the configuration of claim 2, so that particles of various particle sizes can be finely separated depending on the processing purpose or desired product. It has excellent effects such as being able to perform.

[Brief description of the drawings]

FIG. 1 is a schematic view of the whole of the present invention, FIG. 2 is a longitudinal sectional side view of the separator body, and FIG. 3 is a sectional view taken along the line II in FIG. DESCRIPTION OF SYMBOLS 1 ... Main body 2 ... Inner wall surface 7 ... Raw material supply part 8 ... Receiving cylinder 9 ... Jet pipe 10 ... High pressure gas jet part 14 ... Gas supply port 15 ... Particle collection pipe 18 ... Back filter 20 …… Conduit 21 …… Suction valve 22 …… Conduit 23 …… Blower 24 …… Branch pipe 25 …… Adjustment valve in the system 27 …… Conduit

Claims (2)

(57) [Scope of request for utility model registration] 1. A separator body in which a raw material supply section is provided at an upper portion, a gas supply port for forming a centrifugal force field is provided under the material supply section, and a fine particle recovery pipe is erected at a lower center of the separator main body. Wherein the gas in the main body is circulated and supplied into the main body from the gas supply port. 2. A utility model registration according to claim 1, wherein the supply of gas to be supplied into said main body is adjustable, and the pressure for forming a centrifugal force field in said main body is changed. apparatus.