JP2010247114A - Separation plate type centrifuge, separation plate of the same and solid-liquid separation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separation plate type centrifuge which has high solid-liquid separability, to provide a separation plate thereof and to provide a solid-liquid separation method. <P>SOLUTION: The separation plate type centrifuge is comprised of contents that the rotation frontal edge of the separation space partition projection part of the separation plate of the separation plate type centrifuge is formed so that the mass of the unit particle is increased by the contact and collision of individually miscellaneous solid impurity particles which have a difference in the gravity due to the difference of each moving speed and the complication of the passage in the rotation frontal edge, and the centrifugal force is more effectively imparted by the increase of the mass to enhance the separation performance between the liquid and the solid when the solid impurity particles floating in the liquid to be treated sediment with the centrifugal force and are moved for release from the separation space while being guided by the rotation frontal edge. The separation plate of the same and the solid-liquid separation method are also provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention uses a separation plate type centrifugal separator that separates a liquid to be treated (raw solution) into a liquid / liquid and / or a solid / liquid according to a difference in specific gravity by high rotation and high centrifugal force, and a separation plate thereof. The present invention relates to a solid-liquid separation method.

  Separation plate type centrifuge according to the present invention (hereinafter, also simply referred to as “separator”) is used in many fields of industry, for example, purification of fuel oil and lubricating oil of marine diesel engines, It is used as a cleaner for removing solid impurities mixed in these oils (in the liquid to be treated) as the liquid to be treated (Patent Document 1).

JP 2002-336734 A

  The structure of a conventional separator plate type centrifugal separator of this type includes a separator plate group in which a large number of truncated conical separator plates are stacked in the direction of the rotation axis in the rotating body, and is positioned above and below each layer of the separator plate group. The upper and lower gaps between the separator plates, that is, the conical surface gap formed between the inner surface (lower surface) of the upper conical surface of the upper separator plate and the outer conical surface (upper surface) of the lower separator plate in each layer, A plurality of separation space partitioning ridges arranged in the direction of the conical generatrix on the outer surface (upper surface) of the conical surface of the separation plate. For example, eight separation spaces are divided into eight spaces at intervals in the rotation direction of the rotating body. Is formed.

Separation processing by the separator having such a structure is performed as follows.
For example, when a liquid to be treated (hereinafter also referred to as a stock solution) such as used fuel oil or lubricating oil is introduced into the rotating body from the rotating shaft direction of the rotating body, centrifugal force causes the lower part of the separation plate group below. It flows into each separation space and diffuses through a through hole penetrating the separation plate group in the vertical direction from the side.

  The liquid to be treated to which the centrifugal force is applied diffuses into the separation space into which the liquid has flowed, and the liquid rises between the conical surfaces of the upper and lower separation plates toward the center of the separation plate, that is, toward the rotation axis. It flows like so.

  On the other hand, the miscellaneous solid impurity particles mixed in the liquid to be treated settle by centrifugal sedimentation to the inner surface (lower surface) side of the conical surface of the upper separation plate that forms the separation space, and on the settled conical surface. Along the outer circumferential side of the separation space, that is, the bottom side of the conical surface, the fluid flows (discharged from the separation space).

  When the settled solid impurity particles are discharged and flowed toward the outer periphery of the separation space in this way, two separations arranged in front and rear in the rotational direction so as to form (separate) the separation space. While the solid impurity particles are guided by the separation space partition ridge located at the rear of the space partition ridge, more specifically, by the rotation front edge that is the edge on the rotation direction side of the separation space partition ridge, The soot is also sent to the bottom side (outer peripheral end of the separation plate) on the inner surface side of the upper separation plate on the outer peripheral edge side of the separation space so as to be swept out of the separation space by the separation space partition ridge.

  Thus, the solid impurities sent from each separation space to the outer peripheral edge are collected and accumulated at the outer peripheral edge, reach the space in the rotating body around the separation group, and finally, the outermost peripheral empty space in the rotating body. The so-called solid impurity collecting place is temporarily stored in the maximum diameter portion in the rotating body, and is appropriately discharged out of the rotating body by appropriate means.

However, the problem exists while the solid impurity particles are flowing while being guided by the separation space partitioning separation partitioning ribs.
The conventional separation space partitioning ridge has a straight front edge (actually a three-dimensional shape because it is integrally mounted on the conical surface, but if it is mounted thinly in a direction that coincides with the conical generatrix, Since it is formed into a straight line), it comes into contact with the separation space partition ridge (the linear rotation front edge thereof) and then along the separation space partition ridge (the linear rotation front edge thereof). The miscellaneous solid impurity particles while being guided are less likely to be disturbed by the flow of each other's particles, and the particles are less likely to come into contact with or collide with each other. It was guided to.

  For this reason, in the case of solid impurities of relatively small particles and fine fine particles, the applied centrifugal force is small and the flow force is weak, so the sedimentation speed and flow rate are slow, and the discharge flow from the separation space is reduced. Time is required, and solid-liquid separation of fine particles takes a long time, and further improvement in the ability to remove fine particles has been a problem.

  The present invention solves the above-mentioned problems, and a separation plate type centrifugal separator which has further improved the separation performance such as separation performance and separation speed of solid impurities, especially fine particles mixed in the liquid to be treated, and its separation. The purpose is to provide plates and separation methods.

  The invention of the separator plate of the separator type centrifuge according to claim 1 is laminated in a truncated conical separator plate laminated in the direction of the axis of rotation of the rotary member in the rotary member of the separator plate type centrifugal separator. The conical surface gap between the upper and lower separation plates is arranged in the direction of the cone bus of the conical surface of the lower separation plate so that a separation space is formed with a gap in the rotation direction of the rotating body. The separation space partition ridge is curved so as to draw a curve in which the rotation front edge of the separation space partition ridge on the rotation direction side of the rotator bulges in a direction opposite to the rotation direction of the rotator. It has a curved part.

  According to a second aspect of the present invention, in the separation plate of the separation plate type centrifugal separator according to the first aspect, the curved portion is formed over the entire length of the rotating front edge of the separation space partition projection.

  According to a third aspect of the present invention, in the separation plate of the separation plate type centrifugal separator according to the first aspect, the curved portion is formed closer to the bottom side of the conical surface at the rotation front edge of the separation space partition ridge. It is characterized by.

The invention of claim 4 is the separation plate of the separation plate type centrifuge according to claim 1,
The curved portion is characterized in that it is formed by bending the entire length of the separation space partitioning ridge portion formed in a band shape as a whole.

  According to a fifth aspect of the present invention, in the separation plate of the separation plate type centrifugal separator according to the first aspect, the curved portion is the bottom side of the conical surface of the total length of the separation space partitioning ridge portion formed in a band shape as a whole. It is formed by bending the side portion.

  The invention according to claim 6 is the separation plate of the separation plate type centrifugal separator according to any one of claims 1 to 5, wherein the curved portion has a U-shape.

  A seventh aspect of the present invention is the separation plate of the separation plate type centrifugal separator according to any one of the first to sixth aspects, wherein the curve of the curved portion is guided to the rotation front edge of the separation space partitioning ridge portion. However, solid impurities released and moved in the direction of the bottom of the conical surface by centrifugal force are different from each other in the movement speed and flow path of individual impurities, which are lightly different from each other, compared to the case where the rotating front edge is straight. It is characterized in that it is formed so that the mass of the unit particle is increased by contact and collision due to the complexities of the above.

  The invention according to claim 8 is the separation plate of the separation plate type centrifugal separator according to any one of claims 1 to 7, wherein the separation space partition ridge is formed separately from the conical surface of the separation plate. The formed plate-like member is integrally mounted on the conical surface.

  A ninth aspect of the present invention is the separation plate of the separation plate type centrifugal separator according to the eighth aspect, wherein the separation space partition ridge is a plate-like member formed separately from the conical surface of the separation plate. A conical surface is integrally mounted by spot welding.

  A tenth aspect of the present invention is the separation plate of the separation plate type centrifugal separator according to any one of the first to ninth aspects, wherein the separation space partition ridge is a conical apex side of the separation space partition ridge. Compared to the cone bus passing through the end of the conical bus, the cone bus passing through the end on the bottom side of the conical surface of the separation space partitioning ridge is positioned so as to be shifted in the direction opposite to the rotation direction of the rotating body. It is characterized in that it is arranged obliquely with respect to it.

  An eleventh aspect of the invention is the separation plate of the separation plate type centrifugal separator according to any one of the first to ninth aspects, wherein the separation space partitioning ridge portion is disposed in parallel to the conical bus bar. It is characterized by.

  The invention of the separator plate type centrifugal separator according to claim 12 is characterized by including the separator plate according to any one of claims 1 to 11.

  The invention of the separation plate type centrifuge of claim 13 is a separation plate type centrifuge provided with a frustoconical separation plate laminated in the direction of the rotation axis in the rotating body of the separation plate type centrifuge. The conical surface gap between the separation plates that are stacked and positioned above and below is spaced apart in the rotational direction of the rotating body to form a separation space in the direction of the cone generatrix of the conical surface of the separation plate located below. The shape of the rotating front edge on the rotational direction side of the rotating body of the separation space partitioning ridge portion arranged is guided to the rotating front edge by centrifugal force for solid impurity particles floating in the liquid to be treated filling the separation space. When releasing and moving from the separation space, the solid impurity particles of various miscellaneous weights are formed so that the mass of the unit particles increases due to contact and collision due to differences in the movement speed of each other and the complication of the flow path It is characterized by.

  According to a fourteenth aspect of the present invention, in the separation plate centrifuge according to the thirteenth aspect, the shape of the rotating front edge is a curve that bulges in the direction opposite to the rotating direction of the rotating body over the entire length of the rotating front edge. It is characterized by being curved to draw.

  According to a fifteenth aspect of the present invention, in the separation plate type centrifugal separator according to the thirteenth aspect, the curve swells in a direction opposite to the rotational direction of the rotating body so that one bay is formed over the entire length of the rotating front edge. It is formed by a curved line.

  According to a sixteenth aspect of the present invention, in the separation plate type centrifugal separator according to the thirteenth aspect, the curve is formed so that one bay is formed in a portion closer to the bottom side of the conical surface in the entire length of the rotating front edge. It is characterized by being formed by a curve that bulges in a direction opposite to the rotating direction of the rotating body.

  A seventeenth aspect of the invention is characterized in that, in the separation plate centrifuge according to any one of the thirteenth to sixteenth aspects, the curve is a square shape.

  The invention of the solid-liquid separation method in the separation plate type centrifuge according to claim 18 is a method in which a separation plate having a frustoconical shape is laminated in a rotating body direction of the rotating body in the rotating body of the separating plate type centrifugal separator. The conical surface gap between the upper and lower separating plates is arranged in the direction of the conical generatrix of the conical surface of the lower separating plate so that a separation space is formed with an interval in the rotational direction of the rotating body. The separation front surface of the separation space partitioning ridge portion on the rotation direction side of the rotating body is separated while the solid impurity particles floating in the liquid to be treated filling the separation space are guided to the rotation front edge by centrifugal force. When released and moved from space, at the rotating front edge, at the rotating front edge, individual solid particles of various miscellaneous weights that are lightly different from each other are brought into contact by or colliding with each other due to the difference in the moving speed of each other or the complication of the flow path. The mass of increases Bovine form, given the centrifugal force more effectively unit particles by mass increases, to increase the separation performance of liquid and solid, and the contents.

  According to a nineteenth aspect of the present invention, in the solid-liquid separation method in the separation plate centrifuge according to the seventeenth aspect, the shape of the rotating front edge is opposite to the rotating direction of the rotating body over the entire length of the rotating front edge. A curve is formed so as to draw a bulging curve.

  According to a twentieth aspect of the present invention, in the solid-liquid separation method in the separation plate type centrifugal separator according to the seventeenth aspect, the curvature is the rotation direction of the rotating body so as to form one bay over the entire length of the rotating front edge. It is formed by a curve that bulges in the opposite direction.

  The invention according to claim 21 is the solid-liquid separation method in the separation plate centrifuge according to claim 16, wherein the curve forms one bay in the portion of the total length of the rotating front edge closer to the bottom side of the conical surface. Thus, it is formed by a curve that bulges in a direction opposite to the rotation direction of the rotating body.

  According to a twenty-second aspect of the present invention, in the separator plate of the separator-type centrifuge according to any one of the nineteenth to twenty-first aspects, the curve is a square shape.

  According to each of the inventions of claims 1 to 17, since the rotation front edge of each separation space partitioning ridge is provided with a curved portion, the solid impurity particles in the liquid to be treated in the separation space When the fluid flows while being guided by the rotating front edge by centrifugal force, the solid impurity particles of various miscellaneous weights that are lightly different from each other in the curved portion and the vicinity thereof contact or collide due to the difference in the moving speed of each other or the complication of the flow path. Or, by repeating these contacts and collisions, the mass of the unit particles increases, so that the centrifugal force acts on the solid impurity particles more effectively, shortening the time required for separation, and conventionally, separation has been difficult. The solid-liquid separation performance can be further enhanced as compared with the prior art, for example, separation of finer solid impurity particles becomes relatively easy.

  Further, according to the inventions of claims 18 to 22, in any case, at the rotation front edge of each separation space partitioning ridge, individual miscellaneous solid impurity particles having a light weight difference are caused by centrifugal force. When flowing while being guided by the edge, the mass of the unit particles increases due to contact with each other and collides with each other, so that the centrifugal force acts on the increased solid impurity particles more effectively, and the time required for separation The solid-liquid separation performance can be further enhanced as compared with the prior art, for example, by shortening or by separating the finer solid impurity particles, which has been difficult to separate by the prior art.

  According to each of the inventions of claim 2 and claim 4, the mass is increased by contact and collision of solid impurity particles in a relatively wide region over the entire length of the front edge of the separation space partitioning ridge. A separation plate that can be provided can be provided.

  Further, according to the inventions of claims 3 and 5, since the curved portion is provided near the bottom of the conical surface where solid impurity particles are relatively accumulated, the frequency of contact and collision is increased. Therefore, it is possible to provide a separation plate that makes the increase in mass more efficient.

  Further, according to the inventions of claims 8 and 9, both of them can make the separation plate according to the present invention robust and easily and quickly manufactured.

  Further, according to each of the inventions of claim 10 and claim 11, in any case, the arrangement of the separation space partitioning ridge portion with respect to the conical bus bar of the conical surface, for example, an inclination inclined so as to intersect the conical bus bar. Or a separation plate having a separation performance corresponding to the liquid to be treated can be provided by arranging it parallel to the conical bus.

  According to the twelfth aspect of the present invention, it is possible to provide a separation plate type centrifugal separator having a separation performance by the separation plate of the first to eleventh aspects.

  According to the thirteenth aspect of the present invention, it is possible to provide a separation plate type centrifugal separator having a high solid-liquid separation performance capable of separating finer solid impurity particles with a shorter separation time as compared with the prior art.

  According to each of the inventions of claims 14 and 15, the mass is increased by contact or collision of the solid impurity particles in a relatively wide region over the entire length of the front edge of the separation space partitioning ridge. It is possible to provide a separation plate type centrifuge provided with a separation plate.

  According to the sixteenth aspect of the present invention, since the separation plate is provided near the bottom of the conical surface where solid impurity particles are relatively accumulated, the frequency of contact and collision of the solid impurity particles is increased. In addition, the separation plate type centrifuge with higher separation efficiency can be provided by increasing the mass.

  Further, according to the invention of claim 18, not only the solid impurity particles in the liquid to be treated are separated from the liquid as it is, but also the mass of the unit particles is increased by bringing the solid impurity particles into contact with each other or colliding with each other. By making it possible, centrifugal force can be made to act more effectively on the increased solid impurity particles, thereby shortening the time required for separation compared to the prior art, and conventionally difficult to separate, It is possible to provide a solid-liquid separation method in a separation plate type centrifugal separator with high separation performance that enables separation of finer solid impurity particles.

  Further, according to each of the inventions of claims 19 and 20, the mass of the solid impurity particles due to contact or collision of the solid impurity particles in a relatively wide area over the entire length of the front edge of the separation space partitioning ridge. It is possible to provide a solid-liquid separation method in a separation plate centrifuge that can be increased.

  According to the invention of claim 16, the frequency of contact and collision of the solid impurity particles can be increased at and near the curved portion provided near the bottom of the conical surface where the solid impurity particles are relatively accumulated. By increasing the mass, it is possible to provide a solid-liquid separation method in a separation plate centrifuge with higher separation efficiency.

  Hereinafter, the present invention will be described by taking as an example a separation plate type centrifugal separator (hereinafter also simply referred to as a separator) that uses a fuel oil or lubricating oil of a marine diesel engine as a liquid to be treated.

The structure of the separation plate type centrifuge of the embodiment will be described with reference to FIGS.
1 is a sectional view of a rotating body of a separation plate type centrifuge, FIG. 2 is a plan view of a separation plate constituting a separation plate group, FIG. 3 is a bottom view of the separation plate, FIG. 4 is a side view of the separation plate, FIG. 5 is a perspective view of the separation plate, and FIG. 6 is a longitudinal sectional view of the separation plate.

  In FIG. 1, a separating plate group 20 in which a large number of shade-like separating plates 2 are stacked in the rotation axis direction of the rotating body 1 is provided inside the rotating body 1. As shown in FIGS. 2 to 6, the separation plate 2 constituting the separation plate group 20 is obtained by processing a flat plate into a frustoconical shape by drawing.

  In each layer of the separation plate group 20, the upper and lower separation plates 2 and the lower separation plate 2 that are relatively positioned in the upper and lower directions in the stacking direction, that is, the separation plate 2 shown in FIGS. The liquid to be treated is introduced between the inner surface (lower surface) 212 of the conical surface 21 of the upper separation plate 2 and the outer surface (upper surface) 211 of the conical surface 21 of the lower separation plate 2 (see FIG. 1). A conical surface gap (not shown) is formed in the separation plate group 20 as a gap formed by a number of arrows directed obliquely upward in the drawing to indicate the introduction direction of the liquid to be processed.

  On the outer surface (upper surface) 211 of the conical surface 21 of the separation plate 2 positioned relatively below, the separation space partitioning ridge portion 3 extends in the rotation direction of the rotating body 1 (this direction) In the embodiment, a plurality of, for example, eight space-separated spaces 4 are formed at intervals in the figure (right direction = counterclockwise), for example, in a plan view. ing.

Separation processing of liquids to be processed (sludge, water-containing fuel oil, lubricating oil, etc.) by this separator is roughly divided into primary separation and secondary separation as follows.
First, in FIG. 1, the liquid to be treated is introduced into the rotating body 1 from the introduction port 11 provided in the rotation direction on the rotating shaft of the rotating body 1, and has a low specific gravity due to centrifugal force due to the high-speed rotation of the rotating body 1. It is separated into light liquid, heavy liquid with heavy specific gravity, solid matter, etc. (hereinafter referred to as primary separation treatment).

  The light liquid having a low specific gravity separated by the primary separation process penetrates the separation plate group 20 in the vertical direction from the lower side to the upper side of the separation plate group 20, and at least for each separation space 4. Each flow hole 22 provided so as to penetrate the space 4 flows in the upward direction, sequentially flows from the bottom to each separation space 4 of each upper layer, and diffuses into each separation space 4.

Next, the secondary process will be described.
Since the liquid to be processed that diffuses into each separation space 4 is given a centrifugal force, the liquid of the liquid to be processed diffuses from the flow hole 22 into each separation space 4 while the upper and lower separation plates 2 , 2, that is, a separation space 4 that is a gap between the inner surface (lower surface) 212 of the conical surface 21 of the upper separation plate 2 and the outer surface (upper surface) 211 of the conical surface 21 of the lower separation plate 2. It flows upward in the interior so as to climb up the inclined surface 211 of the lower conical surface 21 toward the center of the separation plate 2, that is, the rotation axis direction. This flow, that is, upward flow, is as indicated by a number of arrows shown in the separation plate group 20 of FIG.

  In this way, the relatively light liquid to be treated that has flowed through the gaps of the separation space 3 of the separation plate 2 of each layer of the separation plate group 20 to the upper layer side of the separation plate group 20, that is, upward, finally becomes FIG. It collect | recovers as a purification | cleaning liquid from the collection port 15 provided in the rotating shaft vicinity of the rotary body 1 shown in FIG.

  On the other hand, particles having a relatively large specific gravity among the various kinds of solid impurity particles to be treated mixed in the liquid to be treated are quickly separated into the space 12 in the rotator 1 by centrifugal sedimentation due to the high-speed rotation of the rotator 1. And is discharged out of the rotating body 4 from the discharge port 14 provided in the maximum diameter section 13 around the trunk of the rotating body 1 with appropriate timing and appropriate means. When viewed from the inside of the rotator 4, the maximum diameter portion 13 is an outermost peripheral space inside and is a dust collection / accumulation place for temporarily storing solid impurities.

  Further, the liquid to be processed having a low specific gravity and solid impurity particles contained in the liquid to be processed constitute a large sedimentation surface (conical area of the separation plate 2 × the number of separation plates 3) formed by the separation plate group 20. In each separation space 3, the inner surface (lower surface) 212 side (the lower surface) of the conical surface 21 of the upper separation plate 2 positioned relatively above (ceiling side) forming the separation space 4 of the settling surface of the separation space 3. It settles on the ceiling side of the separation space 4 due to centrifugal force) and flows along the settled conical surface 21 toward the outer peripheral edge 41 side of the separation space 4, that is, toward the bottom 41 side of the conical surface 21. Hereinafter, this flow is referred to as discharge flow from the separation space 4.

  When the various impurity solid impurities particles settled in each separation space 4 are discharged and flowed toward the outer peripheral edge 41 of each separation space 4, a plurality of the separation spaces 4 are formed in the rotation direction. (Separately), it is located behind the rotational direction of the two separation space partitioning ridges 3 and 3 that are relatively paired and spaced apart in the front-rear direction of the rotational direction. By the separation space partition ridge 3 (for example, the separation space partition ridge 3R with respect to the separation space partition ridge indicated by reference numeral 3F in FIG. 4), more precisely, the rotation direction side of the separation space partition ridge 3R. While the solid impurity particles are being guided by the rotating front edge 31 that is the edge (front edge) of the substrate as indicated by the flow trajectory of the broken arrow in FIG. 5, the separation space 4 is also separated by the separation space partition projection 3R. Swept from So as to be, of the outer peripheral edge 41 side of the separation space 4, sent to the bottom 41 of the inner surface 212 side of the separation plate 2 of the upper (outer peripheral edge 41 of the separating plate 2).

  In FIG. 1, as described above, the solid impurities (not shown) that are sent from each separation space 4 to the outer peripheral edge 41 side and discharged to the outside of the separation plate group 20 are separated from the separation plate group 20. The space 12 in the surrounding rotating body 1 is reached, and finally, in the same manner as described above, the maximum diameter portion 13 in the rotating body 4 which is a so-called solid impurity dust collection place in the outermost peripheral space in the rotating body 4 is reached. It is temporarily stored and discharged from the outlet 14 to the outside of the rotating body 4 by appropriate means.

  As described above, the solid impurity particles floating in the liquid to be processed that fills the separation space 4 are guided outside the separation space 4 while being guided to the rotating front edge 31 of the separation space partition projection 3 by centrifugal force. When the inside of the separation space 4 is released and moved to the outer periphery of the group of plates 20, the individual solid impurity particles having a light weight difference at the rotating front edge 31 are different in the moving speed of each other and the complication of the flow path. The separation space partition ridge 3 is formed so as to increase the mass of the unit particles by contact or collision (broken arrow in FIG. 5), more precisely, the rotation front edge 31 of the separation space partition ridge 3 is formed. .

The arrangement of the separation space partitioning ridges 3 with respect to the conical bus of the conical surface 21 of the separating plate 2 is, for example, an inclination inclined so as to intersect with the conical bus, but is not substantially shown but substantially parallel to the conical bus. It may be arranged (arranged).
In any case, the separation space partition ridge 3 acts so as to relatively sweep out the solid impurity particles in the separation space 4 to the bottom 41 side below the separation space 4 according to the centrifugal force. Since it is an apparatus, the upper end side of the separation space partition ridge 3 is positioned on the rotational direction side and the lower end side of the separation space partition ridge 3 is rotated with respect to the conical mother ship passing through the separation space partition ridge 3. It arrange | positions so that it may become the inclination (henceforth only inclination) located in the back side.
The separation space partitioning ridge portion 3 is disposed so that this inclination, that is, the inclination becomes an optimum angle for separation according to the components of the liquid to be treated and the physical properties of the solid impurities mixed in the liquid to be treated.

  When the separation space partitioning ridge portion 3 is provided in this way, the mass of the impurity particles can be increased by contact and collision between the solid impurity particles, and the solid impurity whose centrifugal force is more effectively increased by increasing the particle mass. Since they are applied to the particles (unit particles) and act on them, the solid-liquid separation, that is, the separation performance between the liquid and the solid can be further enhanced as compared with the conventional separator.

  In the embodiment, the separation plate 3 is provided by integrally attaching the separation space partitioning ridge portion 3 formed in the shape of a “he” to the conical surface 21 formed in a truncated cone shape by spot welding. The robust structure is difficult to separate easily from the conical surface plate (21) which is the main body of the separation plate 3.

The shape of the rotation front edge 31 of the separation space partitioning ridge 3 of this embodiment is the direction opposite to the rotation direction (right rotation in the figure) of the rotating body 4 over the entire length of the rotation front edge 31 (left direction in the figure). A curve is formed so as to draw a curve that bulges.
Thus, by making it the curve over the full length of the front edge, ie, the rotation front edge 31, of the separation space partitioning ridge part 3, the mass increase by contact and collision of solid impurity particles can be achieved in a relatively wide region.

In addition, the curved portion is formed deepest in the entire length of the rotating front edge 31 at a portion closer to the bottom 41 side of the conical surface 21.
As described above, when the curved portion is provided near the bottom 41 of the conical surface 21 where the solid impurity particles are relatively accumulated, the frequency of contact and collision between the particles can be increased, and the mass increase of the particles can be made more efficient. Can be made.

The shape of the separation space partitioning ridge 3 in the shape of “He” shown in the embodiment is the same as the solid-liquid separation performance experiment using the fuel oil or lubricating oil of the marine diesel engine as the liquid to be treated. It is the best shape found in all experiments.
Therefore, the shape of the separation space partition projection 3 differs depending on the performance and application of the separator, for example, the components of the liquid to be processed and the physical properties of solid impurities (particles) mixed in the liquid to be processed. There is also.
However, in any case, the shape of the separation space partition projection 3, more precisely the shape of the rotating front edge 31 is not a linear shape as in the prior art, but flows while being guided by the rotating front edge 31. It is preferable that the individual solid impurity particles have a curvilinear shape in which contact and collision with each other occur more efficiently.

  In addition, for example, in Patent Document 1, the conventional separation space partition ridge is linear in the rotation front edge of a strip-shaped gap piece (reference numeral 2 in the drawing of the same document) corresponding to the separation space partition ridge ( Actually, it is solidly mounted on the conical surface, so that it has a three-dimensional shape, but when it is mounted thinly in the direction that coincides with the conical generatrix, it is formed into a strip-like gap piece or separation space. The miscellaneous solid impurity particles in contact with the partitioning ridge (the linear rotating front edge) and being guided along the separation space partitioning ridge (the linear rotating front edge) The flow of each other's particles was confused and turbulent, and the particles were less likely to come into contact with or collide with each other. In a sense, they were guided to flow in an orderly and orderly manner.

  For this reason, since the solid impurity particles mixed in the liquid to be treated floated and guided in the size of the particles as they were mixed, the solid impurities of relatively fine particles and particularly fine particles are relatively small. In this case, the applied centrifugal force is small and the flow force is weak, the sedimentation speed and the flow rate are slow, the discharge flow from the separation space 4 takes a long time, and the solid-liquid separation of fine particles is also long. However, the ability to remove fine particles was insufficient.

  Although the present invention has been described with respect to the separation plate type centrifugal separator using the fuel oil or lubricating oil of the marine diesel engine as the liquid to be processed in the above embodiment, the present invention is not limited to this, and in a solid-liquid separator used industrially. Widely available.

It is sectional drawing of the rotary body of a separation plate type centrifuge. It is a top view of the separating plate which comprises a separating plate group. It is a bottom view of a separation plate. It is a side view of a separation plate. It is a perspective view of a separation plate. It is a longitudinal cross-sectional view of a separating plate.

1 Rotating body 11 Inlet (liquid to be treated)
12 Space (Rotating body)
13 Maximum diameter part (rotating body)
14 Discharge port (solid impurities)
15 Collection port (Purified liquid)
2 Separating plate 20 Separating plate group 21 Conical surface 211 External surface (upper surface) of conical surface
212 Conical inner surface (lower surface)
22 distribution hole
3 Separation space partition ridge 3R Separation space partition ridge (Fig. 5)
3F Separation space partition ridge (Figure 5)
31 Rotating front edge (front edge of separation space partition ridge)
4 Separation space 41 Bottom of conical surface (outer edge of separation plate)

Claims (22)

In a truncated cone-shaped separation plate stacked in the direction of the rotation axis of the rotary plate in the rotary plate of the separation plate type centrifuge, a conical surface gap between the stacked upper and lower separation plates is defined by the rotary body. Separation space partition ridges arranged in the direction of the cone bus of the conical surface of the separation plate located below so that the separation space is formed at intervals in the rotation direction,
The rotating front edge on the rotating direction side of the rotating body of the separation space partition ridge is
A separation plate of a separation plate type centrifugal separator, comprising a curved portion that is curved so as to draw a curve that swells in a direction opposite to the rotation direction of the rotating body. The separation plate of the separation plate type centrifugal separator according to claim 1, wherein the curved portion is formed over the entire length of the rotation front edge of the separation space partitioning ridge portion. The separation plate of the separation plate type centrifugal separator according to claim 1, wherein the bending portion is formed closer to the bottom side of the conical surface at the rotation front edge of the separation space partitioning ridge portion.   The separation plate of the separation plate type centrifugal separator according to claim 1, wherein the bending portion is formed by bending the entire length of the separation space partitioning ridge portion formed in a band shape as a whole.   2. The separation plate type centrifugal separator according to claim 1, wherein the curved portion is formed by bending a portion closer to the bottom side of the conical surface of the entire length of the separation space partitioning ridge portion formed in a band shape as a whole. Machine separation plate.   The separation plate of the separation plate type centrifuge according to any one of claims 1 to 5, wherein the curved portion has a U-shape. The curve of the curved portion is lighter in weight than the solid impurity that is released and moved in the bottom direction of the conical surface by centrifugal force while being guided by the rotating front edge of the separation space partition ridge. 7. The solid impurities particles of different miscellaneous differences are formed so that the mass of the unit particles is increased by contact or collision due to differences in moving speeds or complications of the flow paths. A separation plate of the separation plate type centrifuge according to any one of the above. The separation space partitioning ridge is formed by integrally mounting a plate-like member formed separately from the conical surface of the separation plate on the conical surface. A separator plate of the separator plate type centrifugal separator according to claim 1. 9. The separation space partitioning ridge is formed by integrally mounting a plate-like member formed separately from the conical surface of the separation plate on the conical surface by spot welding. Separation plate of separation plate type centrifuge. The separation space partition ridge is more conical on the cone bus that passes through the bottom edge of the conical surface of the separation space partition ridge than the cone bus that passes through the end of the separation space partition ridge. The separation plate type centrifugal separator according to any one of claims 1 to 9, wherein the separator is disposed obliquely with respect to the conical bus bar so as to be shifted in a direction opposite to a rotation direction of the rotating body. Machine separation plate. The separation plate of the separation plate type centrifugal separator according to any one of claims 1 to 9, wherein the separation space partitioning ridge portion is disposed in parallel with the conical bus.   A separation plate type centrifugal separator comprising the separation plate according to claim 1. In the separation plate type centrifuge having a frustoconical separation plate stacked in the direction of the rotation axis in the rotating body of the separation plate type centrifuge,
In order to form a separation space with a gap between the conical surfaces between the separation plates positioned above and below in the rotation direction of the rotating body, the conical surface of the conical surface of the conical surface of the separation plate located below is formed. The shape of the rotating front edge on the rotating direction side of the rotating body of the separation space partitioning ridge portion disposed,
When the solid impurity particles floating in the liquid to be treated that fills the separation space are released from the separation space while being guided to the rotation front edge by centrifugal force, in the rotation front edge,
A separation plate type centrifuge characterized in that individual miscellaneous solid impurity particles having light weight differences are formed so that the mass of unit particles increases due to contact and collision due to differences in moving speeds and complications of flow paths.   14. The separation plate type centrifuge according to claim 13, wherein the shape of the rotating front edge is curved so as to draw a curve that bulges in the direction opposite to the rotating direction of the rotating body over the entire length of the rotating front edge. Separator.   14. The separator plate according to claim 13, wherein the curve is formed by a curve that bulges in a direction opposite to the rotation direction of the rotating body so that a single bay is formed over the entire length of the rotating front edge. centrifuge.   The curve formation is formed by a curve that bulges in the direction opposite to the rotation direction of the rotating body so that one bay is formed in the portion of the total length of the rotating front edge closer to the bottom side of the conical surface. The separation plate type centrifuge according to claim 13.   The separator-type centrifuge according to any one of claims 13 to 16, wherein the curve is a U-shape. In a truncated cone-shaped separation plate stacked in the direction of the rotation axis of the rotary plate in the rotary plate of the separation plate type centrifuge, a conical surface gap between the stacked upper and lower separation plates is defined by the rotary body. Rotating front edge on the rotating direction side of the rotating body of the separating space partitioning ridge disposed in the direction of the conical generatrix of the conical surface of the lower separating plate so that the separating space is formed at intervals in the rotating direction The
When solid impurity particles floating in the liquid to be treated that fills the separation space are released and moved from the separation space while being guided to the rotation front edge by a centrifugal force, individual miscellaneous miscellaneous differences at the rotation front edge are slightly different. The solid impurity particles are formed so that the mass of the unit particles increases due to contact and collision due to the difference in the moving speed of each other and the complication of the flow path,
A solid-liquid separation method in a separation plate type centrifugal separator, which is characterized in that centrifugal force is more effectively applied to unit particles due to an increase in mass and the separation performance of liquid and solid is enhanced.   18. The separation plate type centrifugal separator according to claim 17, wherein the shape of the rotating front edge is curved so as to draw a curve that bulges in the direction opposite to the rotating direction of the rotating body over the entire length of the rotating front edge. Solid-liquid separation method in the machine.   18. The separation plate type centrifugal separator according to claim 17, wherein the curve is formed by a curve that bulges in a direction opposite to the rotation direction of the rotating body so as to form one bay over the entire length of the rotating front edge. Solid-liquid separation method in the machine.   The curve is formed by a curve that bulges in a direction opposite to the rotation direction of the rotating body so as to form one bay in a portion of the total length of the rotating front edge closer to the bottom side of the conical surface. Item 18. A solid-liquid separation method in the separation plate centrifuge according to item 16. The separation plate of the separation plate type centrifuge according to any one of claims 19 to 21, wherein the curve has a U-shape.

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