JPS5928680Y2 - centrifugal concentrator - Google Patents

Description

[Detailed description of the invention] The present invention provides a flow path for supplying the suspension to be treated and a flow path for discharging the separated liquid collected on the rotation axis side to the paper cylinder for concentration. The present invention relates to a centrifugal concentrator in which a passage is provided on the upper side in the direction of the rotation axis.

In the above method, as the suspension is continuously supplied, the supplied suspension collides with the surface of the separated liquid and is scattered, and the scattered suspension is directly discharged from the separated liquid. When the suspension enters the flow path and is discharged, or when the suspension enters the surface of the separated liquid, disturbance occurs near the surface of the separated liquid, and the disturbed separated liquid flows into the discharge flow path. such as flowing into and being discharged, etc.
The solid content concentration of the separated liquid discharged was poor, and the solid content recovery efficiency was low.

In view of the above points, the present invention reliably prevents the continuously supplied suspension from directly flowing into the separated liquid discharge channel by adding a simple structure, and also prevents disturbance caused by the suspension from being supplied. The purpose of this invention is to discharge the separated liquid in a state that avoids the influence of this, sufficiently lowering the concentration of the discharged separated liquid and improving the solid content recovery efficiency.

The centrifugal concentrator of the present invention includes a flow path for supplying a suspension to be treated to a rotating cylindrical body for concentration;

A centrifugal concentrator in which a flow path for discharging the separated liquid collected on the rotation axis side is provided on the upper side in the direction of the rotation axis, and an annular vertical wall is provided on the inner periphery of the ceiling wall of the rotating cylindrical body. At the same time as being installed in a row and being separated from this vertical wall at a predetermined interval in the circumferential direction,
A separated liquid discharge hole constituting a part of the separated liquid discharge flow path is formed at the lower edge of the vertical wall and protrudes slightly radially outward and radially inward from the vertical wall over its entire circumference. A shielding plate is attached in such a state that the

Therefore, the following effects can be obtained.

■ When the suspension to be treated is continuously supplied, the untreated suspension flows in the upper layer of the separated liquid and flows out from the separated liquid discharge channel. It can be completely blocked by the attached shielding plate that protrudes slightly outward in the direction and inward in the radial direction, and even if it is disturbed near the liquid surface of the separated liquid as the suspension is supplied, Until the separated liquid in a disturbed state reaches the part corresponding to the shielding plate, it can be subjected to sufficient centrifugal concentration action, and only the separated liquid that has passed through the radially outer side of the shielding plate is discharged from the discharge liquid path. Therefore, while improving solid content recovery efficiency,
Continuous supply of suspension became possible.

O. Since separated liquid discharge holes forming a part of the separated liquid discharge channel are formed in the vertical wall at a predetermined interval in the circumferential direction, by allowing the separated liquid to pass through the discharge holes. Flow resistance can be imparted, and therefore the outflow of solid content can be further suppressed.

Next, embodiments of the present invention will be described in detail based on the drawings.

A rotary cylindrical body 1 for concentration, which has a U-shaped cross section and an annular storage space S for the processed material, is connected to a vertical axis 1 via a drive mechanism 2.
A flow path r is provided around the cylindrical body 1 so as to be freely rotatable, and a flow path r is provided for supplying the suspension stored in the storage tank 3 near one end side of the space S, and on the other hand, on the upper side of the cylindrical body 1, In addition to providing a flow path R for discharging the separated liquid 10, which is directed toward the (b) rotation axis P side of the cylindrical body 1 as it rotates, by overflow,
A device 4 for recovering the concentrate 11 stuck to the inner circumferential wall of the cylindrical body 1 is provided so as to be switchable between an active state and a non-active state by expanding and contracting the cylinder 5. The collected suspension such as sludge is concentrated and separated by the centrifugal force caused by the high speed rotation of the cylindrical body 1, and when a predetermined amount of concentrate 11 is stuck, the supply of the suspension is stopped and the concentrate is separated. This is a so-called batch type centrifugal concentrator, which collects 11 and then concentrates and separates it again.

To configure the separated liquid discharge flow path R, an annular vertical wall 6 is continuously provided along the inner peripheral edge of the ceiling wall 1a of the cylindrical body 1, and a predetermined interval is spaced from the vertical wall 6 in the circumferential direction. Separated liquid discharge hole 7
... is formed, and at the lower edge of the vertical wall 6,
A shielding plate 8 is provided around the entire circumference of the cylindrical body 1 so as to protrude inward in the radial direction of the cylindrical body 1 from a position slightly below the liquid level of the separated liquid 10, so that the untreated state of the supplied suspension is maintained. In addition to preventing direct outflow at In addition, the discharge holes γ and 8 are stalled by colliding with the shielding plate 8, and are subjected to centrifugal force in that state for good concentration and separation.
... is configured to provide flow resistance by passing through, thereby further suppressing the outflow of solid content.

Note that the present invention is not limited to the patch-type centrifugal concentrator that concentrates and separates the suspension and recovers the concentrate 11 as in the above-mentioned series of implementations, but also applies to a cylindrical body 1 as shown in FIG. A centrifugal concentrator of a type in which a concentrate recovery space S1 is formed on the lower end side via a partition wall 9, and a concentrate recovery channel R1 is connected thereto, so that both concentration separation and concentrate 11 recovery can be performed continuously. can also be applied.

[Brief explanation of the drawing]

The drawings show an embodiment of the centrifugal concentrator according to the present invention, with FIG. 1 being an overall longitudinal sectional view, and FIG. 2 being an overall longitudinal sectional view showing a modification. 1...Cylindrical body, 1a...Ceiling wall, 6.
... Vertical wall, 7... Separated liquid discharge hole, S...
...shielding plate, r...suspension supply channel, R
...Separated liquid discharge channel, P...Rotation axis of the cylindrical body.

Claims (1)

[Scope of utility model registration request] A flow path r for supplying the suspension to be treated and a flow path R for discharging the separated liquid collected on the rotation axis P side are connected to the rotation axis P for the concentration rotating cylindrical body 1. A centrifugal concentrator provided on the upper side, the ceiling wall 1a of the rotary cylindrical body 1
An annular vertical wall 6 is continuously provided on the inner peripheral edge, and a separated liquid discharge hole 7 forming a part of the separated liquid discharge channel R is provided at a predetermined interval in the circumferential direction on this vertical wall 6. ... is formed on the lower edge of the vertical wall 6 over the entire circumference.
A centrifugal concentrator equipped with a shielding plate 8 that protrudes slightly outward and inward in the radial direction.