CN115003417A - Centrifugal separation device and separation plate - Google Patents
Centrifugal separation device and separation plate Download PDFInfo
- Publication number
- CN115003417A CN115003417A CN202080094006.3A CN202080094006A CN115003417A CN 115003417 A CN115003417 A CN 115003417A CN 202080094006 A CN202080094006 A CN 202080094006A CN 115003417 A CN115003417 A CN 115003417A
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- CN
- China
- Prior art keywords
- separation
- centrifugal
- separation plate
- separation device
- gap
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
- B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
- B04B7/12—Inserts, e.g. armouring plates
- B04B7/14—Inserts, e.g. armouring plates for separating walls of conical shape
Abstract
In order to improve the separation capacity without increasing the size of a centrifugal separation device (separation plate type centrifugal separator) or the like, there is provided a centrifugal separation device which comprises a rotating vessel and a plurality of separation plates (201) stacked at a predetermined interval in the rotating vessel and which separates components having different specific gravities contained in a fluid to be treated by centrifugal force, wherein a gap portion (strip-shaped gap piece (202)) which maintains the predetermined interval with another stacked separation plate (201) is provided on the surface of the separation plate (201), and at least one of a convex portion or a concave portion (concave-convex portion (203)) having a predetermined pattern is formed in a region between the gap portions.
Description
Technical Field
The present invention relates to a centrifugal separation device of a separation plate type for separating solid components contained in a fluid to be processed, and a separation plate used for such a centrifugal separation device.
Background
A centrifugal separation device is provided with a plurality of separation plates stacked in a direction of a rotation shaft with separation gaps at predetermined intervals by strip-shaped gap pieces, and when a fluid to be treated flowing into the separation gaps flows in a center direction of the separation plates, solid components and the like move in an outer circumferential direction of the separation plates by centrifugal sedimentation and are separated (for example, see patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2002-336734
Disclosure of Invention
Problems to be solved by the invention
In order to improve the separation performance of the centrifugal separation device of the separation plate type, it is conceivable to increase the number of separation plates or increase the outer diameter of the separation plates, but this results in an increase in the size of the device.
The present invention has been made in view of the above problems, and an object thereof is to improve the separation ability without increasing the size of a centrifugal separation apparatus or the like.
Means for solving the problems
In order to achieve the above object, the present invention provides a centrifugal separator including a rotating container and a plurality of separation plates stacked at predetermined intervals in the rotating container, for separating components having different specific gravities from a fluid to be processed by centrifugal force,
the separation plate has a gap portion provided on a surface thereof to maintain the predetermined interval with another separation plate stacked, and at least one of a convex portion and a concave portion having a predetermined pattern is formed in a region between the gap portions among the plurality of separation plates and at a position overlapping each other in the stacking direction.
This can easily improve the throughput by increasing the surface area of the separation plate.
Effects of the invention
The present invention has an object to improve the separation ability without increasing the size of a centrifugal separation apparatus.
Drawings
Fig. 1 is a front sectional view of a main part of a centrifugal separation apparatus.
Fig. 2 is a perspective view showing the structure of the separation plate.
Fig. 3 is a sectional view taken along line III-III of fig. 2.
Fig. 4 is a perspective view showing the structure of another separation plate.
Fig. 5 is a perspective view showing the structure of yet another separation plate.
Fig. 6 is a perspective view showing the structure of yet another separation plate.
Detailed Description
Hereinafter, as an embodiment of the present invention, a centrifugal separator as a separation plate type centrifugal separator used for, for example, purification of a stock solution of a fluid to be treated such as fuel oil and lubricating oil in a marine diesel engine or for a classification and separation operation in various industrial fields will be described. The separation plate type centrifugal separator is a vertical centrifugal separator, and is formed by stacking a plurality of separation plates made of thin plates of truncated conical plates in a rotating body with a small gap in the axial direction of a guide drum, and separating sludge and the like in the rotating body by centrifugal force. The sludge is a solid substance or the like having a different specific gravity contained in the fluid to be treated, and more specifically, is a solid component separated/deposited on the outermost radial portion side in the rotating body by a centrifugal force.
(schematic structure of separator type centrifugal separator)
The separation plate type centrifugal separator has:
a guide tube 105 which, as shown in fig. 1, guides the stock solution supplied from an upper portion toward a lowermost portion in the rotary container, as gradually expanded, inside the rotary container attached to the rotary shaft and rotating at a high speed; and
and a plurality of separation plates 201 stacked with a small gap therebetween in the axial direction of the guide tube 105 for separating components such as sludge in the raw liquid by a difference in specific gravity.
In the process of the stock solution introduced into the above-described separator plate type centrifugal separator flowing upward through the gap between the separation plates 201, the solid components having a high specific gravity are separated into the sludge deposition region, the oil (light liquid) is separated into the center side of the rotary container, and the separated water is discharged by the heavy liquid impeller provided at the upper portion of the rotary container.
(specific construction and separation action of separation plate 201)
As shown in fig. 2, the separating plate 201 (disk) has a bamboo hat shape made of, for example, stainless steel having a thickness of 0.5mm, that is, a truncated cone shape having an upper end portion cut off by a plane parallel to the open bottom surface and having an annular portion 201a in the plane provided on the inner peripheral side. A strip-shaped gap piece 202 is provided on the outer peripheral surface of the separation plate 201 along the conical generatrix of the separation plate as a gap portion for maintaining the interval between the separation plates 201 at, for example, 0.6mm when the separation plate is assembled to the separation plate type centrifugal separator. A notch 201b is formed in a part of the inner peripheral side of the annular portion 201a, and a key 251 is inserted between the notch 201b and the key groove 105a formed in the guide cylinder 105 shown in fig. 1, whereby the position of the separation plate 201 in the rotational direction can be positioned (synchronized, rotation-stopped). The gap piece 202 is not limited to a strip shape, and may be circular or elliptical. Further, the gap pieces are not limited to the arrangement, and the separation plates 201 may be formed so that the separation is maintained at a predetermined interval by not overlapping the upper and lower separation plates 201 with the projections and recesses different from the projections and recesses 203 described later. Even if the projections and depressions are formed at positions overlapping the upper and lower separation plates 201, the intervals between the separation plates 201 can be maintained at predetermined intervals by, for example, making the radius of curvature of the concave portions smaller than the radius of curvature of the convex portions.
Here, the separation capacity (throughput) when a fluid to be treated is treated by centrifugal separation between the separation plates 201 as described above is generally proportional to the sedimentation area, that is, the surface area of the separation plates 201. Therefore, in order to improve the separation capability, it is general to increase the number of the separation plates 201 or to increase the outer diameter of the separation plates 201. In contrast, in the separation plate 201 of the present embodiment, for example, an arc-shaped concave-convex portion 203 is formed in a region between the strip-shaped gap pieces 202. That is, for example, the concave-convex portion 203 having a waveform in cross section as shown in fig. 3 is formed. In this case, even if the outer dimensions of the separation plate 201 are the same, the surface area of the conical surface is increased, and therefore, the throughput can be easily improved. Therefore, even when the particle size is small, for example, a high throughput can be easily obtained.
(modification example)
In order to increase the surface area of the separation plate 201, the surface area is not limited to the arc-shaped concave-convex portion 203 shown in fig. 2, and for example, a line-shaped concave-convex portion 203 along a generatrix of a conical shape shown in fig. 4 or a curved concave-convex portion 203 such as a spiral shape shown in fig. 5 may be formed. Alternatively, the uneven portion 204 may be formed in a discrete island shape as shown in fig. 6. Further, concave-convex portions having various shapes including these may be combined. Further, the formation of the concave portion and the convex portion is not limited, and only the concave portion or only the convex portion may be formed. Here, the density of the uneven portions 203 and the like may be different between the bottom portion and the top portion of the truncated cone shape in the separation plate 201. Specifically, for example, a region where the concave-convex portion 203 is not provided or a rough region may be provided in the top side portion, so that when the separation plate 201 is formed from a disc material by deep drawing, wrinkles or the like are less likely to occur in the vicinity of the top. Conversely, wrinkles and the like may be absorbed by providing the concave-convex portion 203 and the like.
Description of reference numerals:
105: guiding cylinder
105 a: key groove
201: separating plate
201 a: annular part
201 b: cut-out part
202: gap sheet
203: concave-convex part
204: concave-convex part
251: key with a key body
Claims (5)
1. A centrifugal separator comprising a rotating vessel and a plurality of separation plates stacked at predetermined intervals in the rotating vessel, wherein components having different specific gravities contained in a fluid to be treated are separated by centrifugal force,
the separation plate has a gap portion provided on a surface thereof to maintain the predetermined interval with another separation plate stacked, and at least one of a convex portion and a concave portion having a predetermined pattern is formed in a region between the gap portions among the plurality of separation plates and at a position overlapping each other in the stacking direction.
2. The centrifugal separation device of claim 1,
the separation plate has a truncated cone shape,
the predetermined pattern is formed in any one of a line segment shape along a generatrix direction of the conical surface of the separator plate, a curved line shape tangent to a line segment along a direction intersecting the generatrix, and a discrete island shape.
3. The centrifugal separation device of claim 2,
the convex portions or concave portions are formed such that the density on the top side of the truncated cone shape is lower than the density on the bottom side.
4. The centrifugal separation device according to claim 2 or 3,
the gap part is a strip-shaped gap sheet along the generatrix of the conical surface.
5. A separation plate of a centrifugal separation device, characterized in that,
the centrifugal separation device is the centrifugal separation device of any one of claims 1 to 4,
the gap portion is provided on a surface of the separation plate, and at least one of the convex portion and the concave portion is formed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/002486 WO2021149239A1 (en) | 2020-01-24 | 2020-01-24 | Centrifugal separation device and separation plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115003417A true CN115003417A (en) | 2022-09-02 |
Family
ID=76991823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080094006.3A Pending CN115003417A (en) | 2020-01-24 | 2020-01-24 | Centrifugal separation device and separation plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JP7311638B2 (en) |
| KR (1) | KR20220125360A (en) |
| CN (1) | CN115003417A (en) |
| WO (1) | WO2021149239A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL3315203T3 (en) * | 2016-10-31 | 2019-11-29 | Alfa Laval Corp Ab | A separation disc for a centrifugal separator |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114306B2 (en) * | 1972-12-23 | 1976-05-08 | ||
| SE457612B (en) * | 1987-12-07 | 1989-01-16 | Alfa Laval Separation Ab | Centrifugal separator causes separation of a substance dispersed in a liquid |
| SE470348B (en) * | 1992-06-16 | 1994-01-31 | Alfa Laval Separation Ab | Centrifugal separator with separating discs which are provided with flow barriers |
| SE504094C2 (en) * | 1995-03-06 | 1996-11-11 | Tetra Laval Holdings & Finance | Disc stack of centrifugal separator discs |
| JP4745526B2 (en) | 2001-05-11 | 2011-08-10 | 三菱化工機株式会社 | Separator plate centrifuge and separator plate used therefor |
| EP2050505B1 (en) * | 2007-10-17 | 2016-04-06 | GEA Mechanical Equipment GmbH | Centrifuge and separator disc |
| SE532153C2 (en) * | 2008-04-08 | 2009-11-03 | Alfa Laval Corp Ab | Separation disc and separator |
| JP5242662B2 (en) * | 2010-11-02 | 2013-07-24 | 定男 篠原 | Separation plate manufacturing method for separation plate type centrifuge |
| DE102011050046A1 (en) * | 2011-05-02 | 2012-11-08 | Gea Mechanical Equipment Gmbh | centrifuge |
| EP3315204B1 (en) * | 2016-10-31 | 2019-05-08 | Alfa Laval Corporate AB | A stack of separation discs |
-
2020
- 2020-01-24 KR KR1020227028732A patent/KR20220125360A/en unknown
- 2020-01-24 JP JP2021572232A patent/JP7311638B2/en active Active
- 2020-01-24 CN CN202080094006.3A patent/CN115003417A/en active Pending
- 2020-01-24 WO PCT/JP2020/002486 patent/WO2021149239A1/en active Application Filing
-
2023
- 2023-07-06 JP JP2023111337A patent/JP2023118918A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7311638B2 (en) | 2023-07-19 |
| KR20220125360A (en) | 2022-09-14 |
| JP2023118918A (en) | 2023-08-25 |
| JPWO2021149239A1 (en) | 2021-07-29 |
| WO2021149239A1 (en) | 2021-07-29 |
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