JPH0624642B2 - Slurry separation method - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for separating a slurry.

[0002]

2. Description of the Related Art For example, as in a jig used as a type of gravity separator, particles to be separated are continuously charged into a liquid in a separation chamber while the liquid is vertically moved (pulsed) to form a liquid. In this method, particles having a large specific gravity (density) are collected from the lower part of the separation chamber and small particles are collected from the upper part by the relative motion of the.

[0003]

The conventional example is as described above.
In short, because of the separation operation in the gravitational field, there is a limit to the particle size that can be separated, and the particle size up to the mm unit is unsuitable for separation of finer particle size.

The present invention was devised in view of such a situation, and an object of the present invention is to provide a separation method capable of separating slurry particles having a smaller particle diameter than conventional ones.

[0005]

In a slurry moving along a swirl flow and along the axial direction of the swirl flow, the liquid is intermittently changed from the circumferential side of the swirl flow to the radial direction of the swirl flow. It is designed to be injected and separated.

[0006]

1 is a schematic sectional view of an apparatus for applying the method of the present invention.

In the figure, reference numeral 1 is a main cylinder forming the separation chamber 2,
The main cylinder 1 is supported by a rotary support shaft 3 penetrating the main cylinder 1 (not shown), and is freely rotatable by a drive device (not shown).

The separation chamber 2 communicates with a slurry inlet 5 composed of a small diameter portion 4 provided on one end side of the main cylinder 1 on one side, and on the other end side of the main cylinder 1 on the other side. It communicates with the recovery part 7 provided in the funnel-shaped part 6.

The recovery part 7 is a light particle recovery part 9 consisting of a space inside the funnel-shaped part 6 and surrounded by a funnel-shaped inner cylinder 8 arranged coaxially with the funnel-shaped part 6, an inner cylinder 8 and the above-mentioned. It is composed of a heavy particle recovery section 10 composed of a space section partitioned by the funnel-shaped section 6.

FIG. 11 shows an outer cylinder integrally formed with the main cylinder 1 by surrounding the entire circumference of the main cylinder 1 except for the funnel-shaped portion 6. The outer cylinder 1 has a small-diameter portion 12 and the main cylinder. The space defined by the small-diameter portion 4 of 1 constitutes a liquid injection port 13, the injection port 13 communicates with a liquid chamber 14 arranged on the peripheral side of the separation chamber 2, and the liquid chamber 14 is the separation chamber. 2 are connected to the separation chamber 2 through innumerable pores 15, 15, 15 ...

Further, 17 is a swivel plate provided on the rotary support shaft 3, and the swivel plate 17 is provided on the slurry injection port 5 side of the separation chamber 2.

When the separation chamber 2 and the liquid chamber 14 are filled with the liquid and the rotation support shaft 3 is rotated, the main cylinder 1, the inner cylinder 8 and the outer cylinder 11 supported by the rotation support shaft 3 are also rotated. At the same time, the swirl flow is generated in the separation chamber 2 by the action of the swirl plate 16 at an early stage.

At this point, when the slurry is continuously injected through the slurry injection port 5, the slurry injected into the separation chamber 2 is along the swirl flow and along the axis of the swirl flow, that is, the rotating main shaft 3. And moves from the injection port 5 side toward the recovery unit 7.

The centrifugal force acts on the particles in the slurry by this swirling flow, and the particles move toward the peripheral wall 16 of the separation chamber 2 and tend to be condensed.

In this state, when the liquid is intermittently pressed into the liquid chamber 14 through the liquid inlet 13, the fine holes 15, 1
The liquid is intermittently pressed into the separation chamber 2 through the holes 5, 15, ... And the particles concentrating and moving to the side of the peripheral wall 16 of the separation chamber 2 pass through the pores 15, 15, 15 ,. The particles move in the dispersion direction due to the injection pressure, and by repeating the injection and stop of the liquid into the separation chamber 14, the particles move to the collection unit 7 side while repeating the movement in the dispersion direction and the movement in the collecting direction, and move. Light particles that are relatively subjected to the injection pressure and heavy particles that are relatively subjected to centrifugal force are gradually separated, and reach the recovery section 7 where heavy particles are recovered from the heavy particle recovery section 10 and light particles are recovered from the light particles. It is collected from part 9.

The inventor assumes that the flow velocity of the liquid from the pores 15 is 10 cm / s.

The liquid means water and alcohol.

[0018]

EFFECTS OF THE INVENTION The present invention is configured as described above, and is different from the conventional separation operation in the gravitational field, and the separation operation is performed in the centrifugal force field. The operation can be performed.

[Brief description of drawings]

FIG. 1 is a schematic sectional view to which the method of the present invention is applied.

Claims (1)

[Claims] 1. A liquid is intermittently injected into a slurry moving along a swirl flow and along the axial direction of the swirl flow from the circumferential side of the swirl flow in the radial direction of the swirl flow. A method for separating a slurry, which comprises separating.