Centrifugal separation device

Abstract

To increase the separation capacity without causing the centrifugal separation device (separation plate type centrifugal separator) and the like to be large, a centrifugal separation device is provided, which has, for example, a rotating container, and a plurality of separation plates (201) stacked at a prescribed interval inside the rotating container, and separates components having different specific gravities included in a fluid to be treated by a centrifugal force, and a gap portion (strip-shaped gap piece (202)) that maintains the prescribed interval with another separation plate (201) stacked thereon 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)) of a prescribed pattern is formed in the area between the above gap portions.

Description

Technical Field

[0001] The present invention relates to a centrifugal separation apparatus of the separation plate type for separating solid components contained in a fluid being processed, and a separation plate for such a centrifugal separation apparatus. Background Technology

[0002] The centrifugal separation device has multiple stacked separation plates arranged in the direction of rotation axis, with separation gaps separated by strip-shaped spacers at predetermined intervals. When the fluid to be processed flows into the separation gaps toward the center of the separation plates, solid components and the like move along the outer periphery of the separation plates by centrifugal sedimentation and are thus separated (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2002-336734 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] To improve the separation capacity of the centrifugal separation device with the aforementioned separation plate type, it is possible to increase the number of separation plates or increase the outer diameter of the separation plates, but this will result in a larger device size.

[0008] The present invention was made in view of the above-mentioned problems, and its object is to improve separation capacity without causing the centrifugal separation device to become larger.

[0009] Solution for solving the problem

[0010] To achieve the above objectives, the present invention provides a centrifugal separation apparatus comprising a rotating container and a plurality of separation plates stacked at predetermined intervals inside the rotating container, wherein components of different specific gravities contained in the fluid to be processed are separated by centrifugal force, characterized in that...

[0011] The surface of the separating plate is provided with a gap portion that maintains the predetermined interval with another separating plate being stacked, and at least one of the protrusions or recesses of a predetermined pattern is formed in the region between the gap portions and at a position where they overlap in the stacking direction among the plurality of separating plates.

[0012] Therefore, by increasing the surface area of ​​the separation plate, the processing capacity can be easily improved.

[0013] Invention Effects

[0014] According to the present invention, the objective is to improve separation capacity without causing the centrifugal separation device to become larger or the like. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the main part of the centrifugal separation device.

[0016] Figure 2 This is a three-dimensional view showing the structure of the separation plate.

[0017] Figure 3 yes Figure 2 Sectional view along line III-III.

[0018] Figure 4 This is a perspective view showing the structure of another separate plate.

[0019] Figure 5 This is a three-dimensional view showing the structure of another separation plate.

[0020] Figure 6 This is a three-dimensional view showing the structure of another separation plate. Detailed Implementation

[0021] Hereinafter, as an embodiment of the present invention, a centrifugal separation device as a plate centrifugal separator will be described. This plate centrifugal separator is used, for example, for the purification of raw fluids such as fuel oil and lubricating oil for marine diesel engines, or for grading and separation operations in various industrial fields. This plate centrifugal separator is a vertical centrifugal separator, which is formed by stacking multiple separating plates, each composed of a truncated conical plate, along the axial direction of a guide cylinder with small gaps within a rotating body. Within the rotating body, centrifugal force is used to separate sludge and the like. The sludge refers to solids of varying specific gravities contained in the fluid being processed; more specifically, it refers to solid components separated / deposited at the outermost diameter side of the rotating body by centrifugal force.

[0022] (Simplified structure of a plate centrifuge)

[0023] Plate centrifuges have the following features:

[0024] Guide tube 105, which is located inside a rotating container mounted on a rotating shaft and rotating at high speed, such as Figure 1 As shown, the raw liquid supplied from the top is guided towards the bottom of the rotating container in a gradually expanding manner; and

[0025] Separation plates 201 are stacked in multiple layers with small gaps along the axial direction of the guide cylinder 105 to separate the sludge and other components in the raw liquid by means of the difference in specific gravity.

[0026] When the raw liquid is introduced into the centrifuge with such a separation plate as described above, it rises and flows in the gap between the separation plates 201. The heavier solid components are separated into the sludge deposition area, the oil (light liquid) is separated into the center side of the rotating container, and the separated water is discharged through the heavy liquid impeller set at the top of the rotating container.

[0027] (Specific structure and separation function of separation plate 201)

[0028] like Figure 2 As shown, the separating plate 201 (disc) has a conical shape, for example, made of stainless steel with a thickness of 0.5 mm, i.e., the upper end is cut off by a plane parallel to the open bottom surface, and an annular portion 201a is provided on the inner circumferential side of this plane. A strip-shaped gap 202 along the generatrix of the cone of the separating plate is provided on the outer circumferential surface of the separating plate 201 to serve as a gap for maintaining the spacing between the separating plates 201 at, for example, 0.6 mm when assembled into a separating plate type centrifuge. A cutout 201b is formed on a portion of the inner circumferential side of the annular portion 201a, and the cutout 201b is connected to... Figure 1 A key 251 is inserted between the keyways 105a formed in the guide tube 105, enabling the positioning (synchronization, anti-rotation) of the separation plates 201 in the rotational direction. Furthermore, the spacer 202 is not limited to a strip shape, but can also be circular or elliptical. Moreover, it is not limited to providing a spacer; it can also be formed such that the protrusions and concave parts 203, etc., described later, do not overlap on the upper and lower separation plates 201, thereby maintaining the spacing between the separation plates 201 at a predetermined interval. Additionally, even if the protrusions and concave parts are formed at overlapping positions on the upper and lower separation plates 201, the spacing between the separation plates 201 can be maintained at a predetermined interval by making the radius of curvature of the concave parts smaller than that of the convex parts.

[0029] Here, the separation capacity (processing capacity) of the fluid being processed by centrifugal separation between such separation plates 201 is generally proportional to the settling area, i.e., the surface area of ​​the separation plates 201. Therefore, to improve the separation capacity, the number of separation plates 201 is usually increased or the outer diameter of the separation plates 201 is enlarged. In contrast, in the separation plates 201 of this embodiment, for example, arc-shaped uneven portions 203 are formed in the region between the strip-shaped spacers 202. That is, for example, portions exhibiting... Figure 3 The waveform shown has a cross-sectional shape with uneven portions 203. In this case, even if the external dimensions of the separation plate 201 are the same, the processing capacity can be easily improved because the surface area of ​​the conical surface is increased. Therefore, high processing capacity can be easily obtained, for example, when the particle size is small.

[0030] (Modified Example)

[0031] To increase the surface area of ​​the separation plate 201, not limited to Figure 2 The arc-shaped protrusion 203 shown can also be formed, for example. Figure 4 The segment-shaped protrusions and concavities 203 shown along the generatrix of the cone shape, or Figure 5 The spiral-shaped, contour-like uneven portion 203 is shown. Alternatively, it can also be formed... Figure 6 The discrete island-shaped protrusions and concave portions 204 are shown. Furthermore, protrusions and concave portions of various shapes can be combined. Additionally, it is not limited to forming both concave and convex portions; only concave portions or only convex portions can be formed. Here, the density of the protrusions and concave portions 203, etc., can also be made different on the bottom and top sides of the frustum-shaped portion in the separation plate 201. Specifically, for example, a region without protrusions and concave portions 203 or a rough region can be provided on the top side, so that wrinkles are less likely to occur near the top when the separation plate 201 is formed from a circular sheet material through deep drawing. Conversely, wrinkles can also be absorbed by providing protrusions and concave portions 203, etc.

[0032] Explanation of reference numerals in the attached figures:

[0033] 105: Guide tube

[0034] 105a: Keyway

[0035] 201: Separation plate

[0036] 201a: Annular portion

[0037] 201b: Incision site

[0038] 202: Spacer

[0039] 203: Uneven parts

[0040] 204: Uneven parts

[0041] 251: Key

Claims

1. A centrifugal separation device having a rotating container, and a plurality of separation plates having a frustoconical shape stacked at a prescribed interval in a stacking direction inside the rotating container, and separating components having different specific gravities contained in a fluid to be treated by a centrifugal force, characterized in that, a plurality of gap pieces in a strip shape along a generatrix of a conical surface maintaining the prescribed interval with another separation plate stacked are provided on a surface of the separation plate, the plurality of gap pieces are provided at a prescribed interval in a circumferential direction of the surface of the separation plate, the gap pieces are formed in a region of the surface of the separation plate where a convex portion and a concave portion of a prescribed pattern of a wave form are not formed, the convex portion and the concave portion of the prescribed pattern of the wave form are formed in a region between the gap pieces and on the surface and a back surface of the separation plate in the region, and the convex portion and the concave portion of the prescribed pattern of the wave form are formed in a line segment shape along a generatrix of a conical surface of a separation plate.

2. The centrifugal separation device according to claim 1, characterized in that, the convex portion or the concave portion is formed so that a density on a top side of the frustoconical shape is smaller than a density on a bottom side.

3. A centrifugal separation device having a rotating container, and a plurality of separation plates having a frustoconical shape stacked at a prescribed interval in a stacking direction inside the rotating container, and separating components having different specific gravities contained in a fluid to be treated by a centrifugal force, characterized in that, a plurality of gap pieces in a strip shape along a generatrix of a conical surface maintaining the prescribed interval with another separation plate stacked are provided on a surface of the separation plate, the plurality of gap pieces are provided at a prescribed interval in a circumferential direction of the surface of the separation plate, the gap pieces are formed in a region of the surface of the separation plate where a convex portion and a concave portion of a prescribed pattern of a wave form are not formed, the convex portion and the concave portion of the prescribed pattern of the wave form are formed in a region between the gap pieces and on the surface and a back surface of the separation plate in the region, and the convex portion and the concave portion of the prescribed pattern of the wave form are alternately formed in a direction intersecting a generatrix of a conical surface of the separation plate and in a circumferential direction of the separation plate.

4. The centrifugal separation device according to claim 3, characterized in that, the convex portion or the concave portion is formed so that a density on a top side of the frustoconical shape is smaller than a density on a bottom side. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Images