JPH04100554A - Centrifugal separator of liquid - Google Patents

Abstract

PURPOSE:To effectively separate the content such as the solid in a liquid by generating a revolving stream in the liquid within a hermetically closed vertical cylindrical fixed container and passing the liquid through the gaps between rotary discs to guide the same into a rotary cylinder. CONSTITUTION:A liquid supply port 14 is provided to the bottom plate part of a hermetically closed vertical cylindrical fixed container 1 and a rotary cylinder 7 whose upper part protrudes above the fixed container 1 is concentrically arranged in the fixed container 1 in the axial direction of the container 1. Further, rotary discs 8 generating a swirl in the liquid within the fixed container 1 are horizontally provided to the rotary cylinder 7 so as to provide intervals in a vertical direction and liquid passing ports 11 are provided to the outer wall of the rotary cylinder 7 so as to be positioned between the adjacent rotary discs 8. Liquid discharge ports 12 are arranged to the part upwardly protruding from the fixed container 1 of the rotary cylinder 7 and liquid drain pipes 16-19 are connected to the fixed container 1. As a result, the content such as the solid in the liquid can be effectively separated.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is applicable to the purification treatment of naturally polluted water, or solid-liquid mixtures or light solid-liquid mixtures of inorganic, organic, and plant-based substances generated in factories. Centrifugal separation of liquids to purify the liquid, reduce the content of water or oil in the discharged heavy liquid, collect and use the solid fine powder contained, and classify the liquid based on the difference in specific gravity. Regarding equipment.

(Prior Art) Conventionally, horizontal cylindrical or vertical cylindrical rotating bodies have been most widely used for centrifugal separation of liquid materials.

[Problem to be solved by the invention]

In the conventional rotating cylindrical centrifugal separation method described above, all the liquid in the container rotates and approaches the outer periphery (the centrifugal force of the container becomes large, and the centrifugal force of the container is high, but the cylindrical Since various elements such as a support mechanism and a drive mechanism are required to rotate the mold container, even in the case of equipment with small processing capacity,
Furthermore, especially in the case of an apparatus designed to increase its throughput, there is a problem in that the equipment cost per throughput tends to increase.

In order to make the device more compact, it is necessary to fix the outer cylinder of the device and
A configuration in which the liquid in the container is brought into contact with the rotating surface of the outer periphery of the rotating body around the rotation axis to encourage its swirling has been considered, but this approach has limited ability to brake the swirling flow by fixing the outer cylinder. Since the turning driving force due to the contact with the rotating surface of the outer periphery of the rotating body is small, the centrifugal separation effect is weak and it has not been put to practical use.

In addition, in the conventional rotating cylindrical type system, when the centrifuged liquid is to be separated and discharged according to the difference in specific gravity, the whole container is rotating at high speed, so the separation outlet Regarding each stage of equipment, there are difficulties in terms of the equipment, so it is necessary to use a centrifugal separator not only to separate the light liquid and heavy liquid, but also to facilitate the separation and discharge according to the difference in specific gravity. is also a problem.

The present invention seeks to solve more than zero problems with conventional centrifugal separators.

(Means for Solving the Problems) A liquid centrifugal separator of the present invention includes a sealed vertical cylindrical fixed container, a liquid supply port provided on a bottom plate of the fixed container, A rotating cylinder provided concentrically in the axial direction within a fixed container and having an upper portion protruding above the fixed container, which is attached horizontally to the rotating cylinder at intervals in the vertical direction and rotates around the liquid in the fixed container. a rotating plate that generates a flow; a liquid passage port located between the adjacent rotating plates and provided on the outer wall of the rotating cylinder; a liquid discharge port provided in a portion of the rotating cylinder that projects upward from the fixed container; and an exhaust pipe connected to the fixed container.

[Function] In the present invention, the liquid supplied into the fixed container from the liquid supply port on the bottom plate becomes a swirling flow and rises inside the fixed container by the rotary plate that rotates together with the rotating cylinder, and during this time, the liquid is mixed and The contents, such as solid matter, are centrifuged. The liquid, which has become lighter after centrifugation of the contents, flows into the rotating cylinder through the liquid passage port of the rotating cylinder, rises inside the rotating cylinder, and reaches the part that protrudes upward from the fixed container. It is discharged from the provided liquid discharge port. On the other hand, the heavy liquid containing the centrifuged contents is discharged from the drain pipe of the stationary container. As mentioned above, the liquid flows from the outer periphery of the rotary plate to the liquid passage port of the rotating cylinder while swirling inside the fixed container, so a long period of time passes during that time, and solids etc. mixed in the liquid flow. The contents of the are effectively centrifuged. Furthermore, as described above, in the present invention, since centrifugation is performed after a sufficient period of time has elapsed, sufficient centrifugal separation effect is achieved even though the strength of the swirling flow is weakened near the wall surface of the fixed container. The rotation speed of the rotating cylinder can be lowered, and the power required for driving is reduced. Moreover, since the container is not rotated, the mechanism is also simplified.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.

1 is a cylindrical vertical sealed fixed container, and has a cylindrical side wall 2. It has an inclined frustoconical side wall 3 and a horizontal top cover plate 4 and bottom plate 5. A rotating cylinder 7 is provided inside the fixed container l and extends vertically concentrically with the axis of the fixed container l. A rotating shaft 6 driven by a motor 22 is attached to the upper end. The rotating shaft 6
is supported by a bearing 20, and the lower extension 7' of the rotating cylinder 7 is supported by a bearing 21Q below the bottom plate 5. Rotating plates 8, which generate swirling flow in the liquid in the fixed container 1, such as a plurality of discs or rotary blades, are horizontally attached to the rotating cylinder 7 at intervals in the vertical direction. In the fixed container 1 above and below the lower rotary plate 8, a top rotary plate 9 and a bottom rotary plate IO having a larger diameter than the rotary plate 8 are respectively attached horizontally to the rotary cylinder 7. The adjacent rotary plate 8 on the outer wall of the 0-rotation cylinder 7,
9. A plurality of liquid passage ports 11 are provided at the intermediate position of the same outer wall, and a plurality of liquid discharge ports 12 are provided at a portion of the rotating cylinder that protrudes upward from the fixed container 1. It is being

A liquid storage cylinder 13 is provided on the top cover plate 4 of the fixed container 1 so as to surround the protrusion of the rotating cylinder 7 from the fixed container 1 . The lower part of the liquid storage cylinder 13 is connected to the upper cover plate 4 by a rotating circle ti.
It communicates with the upper part of the fixed container 1 through a passage 4a provided surrounding the liquid storage cylinder 13, and a drain pipe 15 for a light liquid is connected to the side wall of the liquid storage cylinder 13.

A liquid supply pipe 14 with a liquid supply pump 23 for a liquid mixed with contents such as solids is connected to a position below the bottom rotary plate 10 of the bottom plate 5 of the fixed container 1, and the side wall of the bottom plate 19 is A heavy liquid drain pipe 19 is connected to the outer position near 2, and a medium liquid drain pipe 18 is connected to the upper part of the side wall 2, and a medium liquid drain pipe 18 is connected to the inclined side wall 3. Liquid drain pipe 16.17
are connected to each other.

Note that the flow direction of the liquid, which will be described later, is indicated by an arrow in FIG.

In this embodiment configured as described above, the liquid supply pump 23
A liquid is supplied into the fixed container 1 from the liquid supply pipe 4, and after flowing outward in the horizontal direction along the rotary plate 10 at the lowest stage, the liquid flows to the rotary plate 8 in the fixed container l. ,9.1
0 gives a swirling flow, which rises inside the fixed container 1 while swirling. The liquid then flows inwardly while swirling between the rotating plates 8, 9, 10, enters the rotating cylinder 7 through the liquid passage port 11, and rises within the rotating cylinder 7. In this way, the liquid becomes a swirling flow within the fixed container 1, and the rotating plates 8, 9...
Since the liquid flows from the outer periphery of the liquid body 10 toward the liquid passage port 11 of the rotating cylinder 7, the passage time becomes longer, and thereby the contents such as solids in the liquid body can be sufficiently centrifuged. At this time, the strength of the swirling flow is weakened near the side wall surface of the fixed container 1, but in this embodiment, the required amount of time is increased by lengthening the time elapsed until the liquid enters the liquid passage port 11 as described above. can be centrifuged.

The liquid whose contents have been separated and lightened rises in the rotating cylinder 7 and flows from the liquid discharge port 12 to the liquid storage cylinder 13, as described above.
flow inward. The solids and other contents in the liquid are further separated by gravity separation in the cylinder 13, the liquid is further lightened, and the liquid from which the solids and other contents have been sufficiently separated is drained. It is discharged from the pipe 15.

On the other hand, the liquid containing the contents separated in the liquid storage cylinder 13 flows back to the upper part of the fixed container 1 through the through hole 4a, becomes the above-mentioned swirling flow in the container 1, and separates the contents. be affected.

As mentioned above, since the uppermost and lowermost rotary plates 9 and 1° are formed to have a larger diameter than the rotary plate 8,
The liquid flowing along the axis is prevented from flowing in the axial direction of the fixed container l, and the liquid flowing into the fixed container 1 from the liquid supply pipe 14 and the liquid flowing into the fixed container 1 from the liquid storage cylinder 13 are prevented from flowing in the axial direction of the fixed container l. In addition to smoothly flowing outward along the rotary plates 9 and 1°, the flow becomes a swirling flow within the fixed container 1, and centrifugal separation of the contents is reliably performed.

On the other hand, the medium liquid containing the separated contents in the fixed container 1 is discharged from the drain pipe 16, 17, 18.

In addition, in this example, only the rotating cylinder and rotating plate were rotated without rotating the container, and by increasing the time elapsed for the liquid to flow into the rotating cylinder, the rotation of the rotating plate was slowed down. Also, since sufficient centrifugal action can be obtained within the fixed container 1, the required driving power can be reduced.

FIG. 2 shows a treatment facility for an aqueous liquid containing fine fibrous contaminants using the above-described embodiment.

Two centrifugal separators according to the previous embodiment are provided, and these are referred to as a secondary centrifugal separator 101 and a secondary centrifugal separation device 102.

The aqueous liquid containing the fine contaminants of Sensai III Award in the liquid tank 103 is sent to the primary centrifugal separator 101 by the liquid supply pump 104, and the aqueous liquid from which the fine contaminants have been separated in the interlayer W101 is converted into liquid 1.
Either return it to 103 or discharge it out of the system as a cleaning liquid. on the other hand,
The separated aqueous liquid containing fine contaminants is sent to a secondary centrifugal separator 102, where the purified aqueous liquid is transferred to a storage tank 103.
The concentrated liquid containing the separated fine pollutants is discharged to an appropriate processing device.

FIG. 3 shows an equipment for separating oil, water, and solids using the above-mentioned embodiment.

The feed liquid obtained by liquefying the organic gas produced by the dry distillation treatment of waste organic matter is fed to the primary centrifugal separator 2201, which is the centrifugal separator according to the above embodiment. The liquid is introduced into the light liquid separation device 202 and the heavy liquid separation device 203 so as to balance the discharge amount by adjusting the valve opening degree. - The light liquid obtained in the next centrifugal separator 201 is introduced into the light liquid separator 202, where it is subjected to a separation action together with the liquid supplied here, and the light oil is removed from the drain pipe 205 (as in the previous embodiment). Medium oil is drained from the drain pipe 15), medium oil is drained from the drain pipe 206 (drain pipe 16, 17 in the above embodiment), and heavy oil is drained from the drain pipe 207 (drain pipe 18 in the above embodiment).
is discharged from. On the other hand, the separation device 201. The heavy liquid containing solids etc. separated in is introduced from the bottom drain pipe to the heavy liquid separation device 203, where it is subjected to separation treatment,
The purified water liquid is introduced into the light liquid separator 202,
The slurry containing the separated contents is sent to appropriate processing equipment.

〔Effect of the invention〕

As explained above, the present invention generates a swirling flow in a liquid in a sealed vertical cylindrical fixed container,
By guiding this into the rotating cylinder through the rotating plates, the liquid can be centrifuged after a sufficient period of time has elapsed, and solids and other contents mixed in the liquid can be effectively separated. In addition, what is rotationally driven is limited to the rotating cylinder and the rotating plate, and the power required for driving can be reduced, and the device is simple and lightweight, making it possible to reduce equipment costs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, and FIGS. 2 and 3 are system diagrams showing examples of centrifugal separation equipment using the same embodiment. 1...Fixed container, 2.3...Side wall. 4... Upper cover plate, 5... Bottom plate 7... Rotating cylinder, 8... Rotating plate. 9... Top rotating plate, 10... Bottom rotating plate 11.
...Liquid passage port, 12...Liquid discharge port 13...Liquid storage cylinder, 14...Liquid supply pipe 15
, 16.17.18.19...Drainage pipe 22...Motor, 23...Liquid supply pump.

Claims (1)

[Claims] A sealed vertical cylindrical fixed container, a liquid supply port provided on the bottom plate of the fixed container, a liquid supply port provided in the fixed container concentrically in the axial direction thereof, and the upper part thereof is above the fixed container. a rotating cylinder that protrudes from the rotating cylinder; a rotating plate that is horizontally attached to the rotating cylinder at intervals in the vertical direction and generates a swirling flow in the liquid in the fixed container; and a rotating plate that is located between the adjacent rotating plates and that A liquid that is characterized by comprising a liquid passage port provided on an outer wall, a liquid discharge port provided in a portion of the rotating cylinder that projects upward from the fixed container, and a drain pipe connected to the fixed container. Body centrifuge.