WO2004091800A1

WO2004091800A1 - Separation plate type centrifugal separator

Info

Publication number: WO2004091800A1
Application number: PCT/JP2004/005060
Authority: WO
Inventors: Yoichi Ishikawa; Shigeyoshi Yuki; Kazumi Otaka
Original assignee: Able Corporation; Saito Separator Limited.
Priority date: 2003-04-15
Filing date: 2004-04-08
Publication date: 2004-10-28

Abstract

A separation plate type centrifugal separator, wherein a separation layer storing a plurality of separation plates stacked on each other in the vertical direction and a sedimentation layer arranged continuously to the outer peripheral side of the separation layer are formed in a separation chamber formed around the rotating shaft of a rotor. The centrifugal separator comprises a partition plate as a lead-in means for leading treated fluid supplied to the rotating center of the rotor from a lead-in opening part positioned on the radial outside of the outer peripheral part of the separation plate into the sedimentation layer in the separation chamber so that, even if the treated fluid contains particulates and solid matter having a specific gravity near the specific gravity of the fluid, the treated fluid can be satisfactorily separated and treated.

Description

Description Separator type centrifuge Technical field

The present invention relates to an improvement in a separation plate type centrifugal separator provided with a plurality of separation plates in a rotor driven to rotate. Background art

The conventional separation plate centrifuge shown in FIG. 6 includes a rotor 100 that is driven to rotate around a vertical axis, and a separation chamber 10 2 provided around the rotation axis 101 of the rotor 100. In addition, a separation layer 102 a accommodating a plurality of separation plates 103 stacked vertically, and a sedimentation layer 10 continuous with the outer periphery of the separation layer 102 a

2b. Each of the separation plates 103 has an umbrella shape, is arranged around the rotation axis 101, is stacked at a predetermined interval from each other, and has an adjacent gap near the outer peripheral portion. Multiple through-holes communicating with each other 1 0

3a is formed at the corresponding position at the top and bottom. Then, between the lowermost separation plate 103 and the inner surface of the separation chamber 102, the liquid to be treated supplied from the supply pipe 106 to the central cavity 105 is placed in the separation chamber 102. An introduction gap 104 for introduction is formed.

For example, when the liquid to be treated containing solids is separated and processed, the above-mentioned separation plate type centrifuge drives the rotor 100 to rotate and introduces the liquid to be treated supplied to the central cavity 105. The liquid is introduced into the separation chamber 102 through the gap 104, and the liquid to be treated is introduced into the gap between the separation plates 103 through the through hole 103a, and the centrifugal force is applied to the separation chamber 102. The liquid to be treated is separated into a clarified liquid and a solid content by means of Then, the clarified liquid passed through the gap between the separation plates 103 is Solids that are discharged by the centripetal pump 107 at the upper part of the rotor 100 through the recovery space 108 formed on the outer periphery of the part 105, and settle and deposit on the outermost peripheral part of the separation chamber 102. The part is intermittently discharged to the outside of the rotor 100 by the opening / closing mechanism.

By the way, in the conventional separation plate type centrifugal separator as described above, the introduction gap 104 is formed between the bottom separation plate 103 and the inner surface of the separation chamber 102, so that separation is performed. The liquid to be treated is introduced into the chamber 102 from the boundary between the separation layer 102 a and the settling layer 102 b.

For this reason, in the conventional separation plate type centrifugal separator, a new liquid to be treated is mixed during the sedimentation / separation step of the liquid to be treated, and the diffusion and separation of the solid content occur simultaneously. However, this unstable state may hinder good separation progress, and in particular, there is a problem that separation efficiency is impaired when separating a liquid to be treated containing solids close to the specific gravity of fine particles and liquid. There was a problem to solve such problems. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has a separation plate type capable of performing a good separation treatment on a liquid to be treated containing a solid content close to the specific gravity of fine particles and liquid. An object of the present invention is to provide a centrifugal separator, in which a separating plate type centrifugal separator of the present invention accommodates a plurality of vertically stacked separator plates in a separation chamber provided around a rotation axis of a rotor. In a separation plate type centrifugal separator provided with a separation layer and a sedimentation layer continuous on the outer peripheral side of the separation layer, the liquid to be treated supplied to the rotation center of the rotor is positioned radially outside the outer periphery of the separation plate. It is characterized by having an introduction means for introducing from the introduction opening into the sedimentary layer of the separation chamber.

In the separator centrifuge described above, the rotor is driven to rotate. Then, the liquid to be processed supplied to the rotation center of the rotor is introduced into the sedimentation layer of the separation chamber from the introduction opening located radially outside the outer periphery of the separation plate by the introduction means. In other words, in the centrifugal separator, the liquid to be treated is introduced from a position near the outermost periphery of the sedimentation layer where solids (or heavy liquid) settle and accumulate. In addition, the movement distance of the liquid flowing out from the settling layer through the gap between the separation plates of the separation layer becomes longer, and the clarified liquid is less affected by the newly introduced liquid to be treated. As a result, the liquid to be treated is separated well.

Further, the separation plate type centrifugal separator of the present invention is characterized in that the introduction opening of the introduction means is located near the outermost periphery of the sedimentation layer of the separation chamber.

In the above-mentioned separation plate type centrifugal separator, the introduction means is means for introducing the liquid to be treated into the sedimentation layer from the introduction opening located near the outermost periphery of the sedimentation layer in the separation chamber. Since the liquid to be treated is introduced into the outermost peripheral portion of the sedimentation layer itself, there is almost no movement of solids in the sedimentation layer, which makes the sedimentation easier, and also the separation plate between the sedimentation layer and the separation layer. The moving distance of the liquid flowing out through the gap is maximized, and the clarified liquid is less affected by the liquid to be treated, so that the liquid to be treated can be separated better. Is

Further, in the separation plate type centrifugal separator of the present invention, the introduction means is disposed around the rotation axis on at least one of the upper and lower sides of the stacked separation plates, and is provided between the stacked separation plates and the inner surface of the separation chamber. It is characterized by having a partition plate for forming a processing liquid introduction gap and an introduction opening.

In the above-mentioned separation plate type centrifugal separator, the introduction means is provided with a partition plate that forms a gap for introducing the liquid to be treated and an opening for introduction between the separation chamber and the inner surface of the separation chamber. The introduction means can be easily realized without significantly modifying the configuration of the machine. Further, the separation plate type centrifugal separator of the present invention further comprises a fluid non-slip for rotating at least one of the partition plate and the inner surface of the separation chamber in the rotation direction of the liquid to be treated in the introduction gap with rotation. It is characterized by having.

In the separator centrifuge described above, at least one of the partition plate and the inner surface of the separation chamber is provided with a fluid non-slip, so that the liquid to be treated supplied to the center of rotation is affected by the rotational angular velocity in the circumferential direction of the partition plate. The liquid to be treated is prevented from slipping, and the liquid to be treated is introduced to the liquid to be treated in the rotating sedimentation layer at a nearly constant velocity, so that the liquids to be treated are rapidly stirred during introduction. Prevent mixing. The separation plate for a separation plate type centrifugal separator according to the present invention includes a separation layer that accommodates a plurality of separation plates vertically stacked in a separation chamber provided around a rotation axis of a rotor, and a separation layer that is continuous with an outer peripheral side of the separation layer. Used in a separation plate type centrifugal separator equipped with a sedimentation layer, and the liquid to be treated supplied to the center of rotation of the rotor is introduced into the sedimentation layer of the separation chamber from a position radially outside the outer periphery of the separation plate. A partition plate that has a larger diameter than the separation plate, is arranged around the rotation axis on one of the upper and lower sides of the stacked separation plate, and is located between the separation chamber surface In addition, a gap for introducing the liquid to be treated and an opening for introduction are formed.

In the above-mentioned partition plate for a centrifugal separator, a separation layer containing a plurality of vertically stacked separation plates is provided in a separation chamber provided around the rotation axis of the rotor, and the separation layer is continuous with the outer peripheral side of the separation layer. In the separation plate type centrifugal separator equipped with a sedimentation layer, a gap for introducing the liquid to be treated and an opening for introduction are formed between the separation chamber and the inner surface of the separation chamber. The opening is formed at a position radially outside the outer periphery of the separation plate. Thus, the liquid to be treated supplied to the center of rotation of the rotor can be introduced into the sedimentation layer of the separation chamber from the introduction opening located radially outside the outer periphery of the separation plate.

Further, the partition plate for a separation plate type centrifugal separator of the present invention is provided with a non-slip fluid for accelerating the liquid to be treated in the rotation direction with the rotation on the surface on the gap side for introduction. It is characterized by:

In the separator plate-type centrifugal separator described above, the surface on the gap side for introduction is provided with a non-slip for fluid that accelerates the liquid to be treated in the rotation direction as it rotates. Prevent the processing liquid from sliding in the circumferential direction of the partition plate under the influence of the rotational angular velocity, and introduce the liquid to be processed into the liquid to be processed in the rotating sedimentation layer at a nearly constant velocity. This prevents rapid stirring and mixing of the liquids to be treated at the time of introduction. BRIEF DESCRIPTION OF THE FIGURES

1 is a cross-sectional view illustrating an embodiment of a centrifuge according to the present invention, FIG. 2 is a cross-sectional view (a) and a bottom view (b) of a partition plate shown in FIG. 1, and FIG. FIG. 4 is a cross-sectional view illustrating another embodiment of the separator centrifuge according to the present invention. FIG. 4 is a plan view (a) and a cross-sectional view (b) of the partition plate shown in FIG. 3, and FIG. FIG. 6 is a cross-sectional view illustrating still another embodiment of the separation plate type centrifuge of the present invention. FIG. 6 is a cross-sectional view illustrating a conventional separation plate type centrifuge. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a diagram illustrating one embodiment of a separation plate type centrifuge according to the present invention.

The illustrated separator-type centrifuge has a separation chamber 2 provided around a rotation axis 1 in a rotor R that is driven to rotate by a rotation axis 1 whose axis is perpendicular. A separation layer 4 accommodating the separation plate 3 and a sedimentation layer 5 continuous with the outer periphery of the separation layer 4 are provided. The rotating shaft 1 uses a motor (not shown) as a rotating drive source. Further, the rotor R is provided with a ball body 6, an upper pole cover 7 forming the separation chamber 2 inside the ball body 6, and a lower guide cylinder 8 concentrically. The ball body 6 has a substantially cylindrical shape with a bottom, and has a cylindrical shaft portion 6 a integrally fitted at the center of the inside with the outside of the rotating shaft 1, and a bag at the upper end of the rotating shaft 1. The nut 10 is fixed to the rotating shaft 1 by screwing.

The guide cylinder 8 has an annular shape having a bent cross section and is fitted around the shaft part 6 a of the pole body 6. At the center, the guide cylinder 8 extends above the shaft part 6 a and has a central hollow part inside. A cylindrical portion 8a forming 9 is provided integrally. In addition, near the lower end of the cylindrical portion 8a, distribution ports 11 for opening the central cavity 9 to the separation chamber 2 side are formed at predetermined intervals in the circumferential direction, and at the upper end of the cylindrical portion 8a. The tip of the supply pipe 13 is set in a non-contact state. A liquid to be treated is supplied to the supply pipe 13 from a supply source (not shown).

Further, a plurality of umbrella-shaped separating plates 3 are mounted in a stacked state on the outer periphery of the cylindrical portion 8a of the guide cylinder 8 through vertically continuous keys 14 and the cylindrical portion 8a is provided. On the outer periphery of a, a collection space 15 communicating with the gap between the separation plates 3 is formed vertically. Each separation plate 3 is provided with a plurality of ribs on its upper surface (or lower surface) in a radial manner, and forms a gap between adjacent separation plates 3 by the height of the rib. As shown in FIG. 1, each of the separation plates 3 has a plurality of through holes 3a formed in the vicinity of the outer peripheral portion. Is distributed.

The ball cover 7 is mounted so as to cover the cylindrical portion 8 a of the guide cylinder 8 and the separation plate 3, forms the separation chamber 2 with the guide cylinder 8, and is screwed into the upper inside of the ball body 6. It is fixed by a ball-shaped ball nut 16.

The separation chamber 2 has the inner separation layer 4 and the outer settling layer 5 as described above. 8, the outer peripheral portion of both inclined surfaces is the outermost peripheral portion A of the sedimentation layer 5 in the separation chamber 2. The separation chamber 2 communicates with the collection space 15 through a gap between the separation plates 3 in the separation layer 4. In addition, a lid 18 is fixed to the upper part of the ball cover 7 by a ring nut 17 around the supply pipe 13, and inside the lid 18, the collection space 15 is formed. A communication chamber 19 is provided for communication. On the other hand, a centripetal pump 20 for pressurizing and discharging the liquid in the recovery chamber 19 is provided outside the supply pipe 13. The recovery chamber 19 rotates, but the centripetal pump 20 does not rotate.

Here, a cylinder 22 is accommodated between the bottom of the ball body 6 and the guide cylinder 8 so as to be able to move up and down, and the first pressure chamber 23 A and the second pressure chamber 23 are arranged above and below the cylinder 22. A pressure chamber 23B is formed. The ball body 6 is formed with first and second flow paths 24A _: 24B communicating with the first and second pressure chambers 23A, 23B, respectively. In addition, the cylinder 22 has a shutter 22 a that extends between the side surface of the ball body 6 and the outer peripheral portion of the guide cylinder 8. An outlet 25 opened and closed by the part 22 a is formed.

The above-mentioned cylinder 22 is connected to the first and second pressure chambers 23 A through the first and second flow paths 24 A and 24 B from the working water supply device 26 provided on the rotating shaft 1. When the working water is supplied to the first and second pressure chambers 23 A and 23 B, the operation is intermittently performed according to the centrifugal pressure difference between the working water supplied to the first and second pressure chambers 23 A and 23 B. Move to the lower limit from the state and open the outlet 25. That is, the solid (or heavy liquid) deposited on the outermost peripheral portion A of the settling layer 5 in the separation chamber 2 is intermittently discharged to the outside. Although not shown, the discharged solid is stored in a collection container via a collection body arranged outside the pole body 6. Then, in the separation plate type centrifugal separator, the centrifugal separator is supplied to the rotation center of the rotor R. There is provided an introduction means for introducing the liquid to be treated into the sedimentation layer 5 of the separation chamber 2 from an introduction opening located radially outside the outer periphery of each separation plate 3. The introduction means of this embodiment is a means for introducing the liquid to be treated into the sedimentation layer 5 from the introduction opening located near the outermost peripheral portion A of the sedimentation layer 5 in the separating nitrogen 2. Is provided with a partition plate P 1 that forms a gap S for introducing the liquid to be treated and an opening T for introducing the liquid to be treated with the lower inner surface of the separation chamber 2.

As shown in FIG. 2, the partition plate P 1 is an annular disk bent along the guide cylinder 8 and has a larger diameter than each of the separation plates 3, and is the outermost peripheral portion of the sedimentation layer 5 in the separation chamber 2. It has the largest possible radius, taking into account the space of solids that settles and deposits on A. The outer periphery of the lower surface of the partition plate P1 has a linear ridge as a fluid non-slip for accelerating the liquid to be treated in the introduction gap s with the rotation in the rotation direction. (Preferably three or more) of baffles B are provided radially and at equal intervals in the circumferential direction. The partition plate P 1 is interposed between the lowermost separation plate 3 and the plan cylinder 8 around the rotation axis 1.

As is clear from the above description, in addition to the rotor R shown in the drawing, the separation plate type centrifugal separator has a rotation driving means for the rotor R, a supply means for the liquid to be treated, and a solid (or heavy liquid) or a clarified liquid. It is equipped with a means for collecting liquid.

The separation plate type centrifuge having the above configuration rotates the rotor R at a constant speed by the rotating shaft 1 and supplies, for example, the liquid to be treated containing solids to the central cavity 9 through the pipe 13. I do. As a result, the liquid to be treated is in a state where the supplied energy has been removed, and is introduced into the sedimentation layer 5 from the distribution port 11 through the introduction gap S and the introduction opening T of the partition plate P 1 and the separation chamber. Centrifuge at 2.

Then, as the separation of the liquid to be treated progresses in the separation chamber 2, solids (M) are deposited and deposited on the outermost peripheral portion A of the sedimentation layer 5 in the separation chamber 2. On the other hand, in the separation plate 3 in the separation layer 4, the clarified liquid further undergoes sedimentation and separation, and reaches the recovery space 15 where sedimentation and separation is completed. The clarified liquid that has passed through the separation plate 3 reaches the centripetal pump 20 from the collection space 15 and is discharged to the outside. The solid content is taken out by the above-described intermittent operation of the cylinder 22. In this way, the separator-type centrifuge continuously performs the separation process of the liquid to be treated.

At this time, in the separator centrifuge, the liquid to be treated is introduced into the outermost peripheral portion A of the sedimentation layer 5 of the separation chamber 2 where the solids are settled and deposited by the partition plate P1. When the distance is very short, sedimentation becomes easy.In addition, the moving distance of the liquid from the sedimentation layer 5 to the separation layer 4 becomes longer, and the sedimentation and separation of the liquid to be treated is performed more sufficiently. The clarified liquid that moves to the target is less affected by the liquid to be treated, and the liquid to be treated is separated well.

In addition, in the separator centrifuge, the partition plate P1 was provided with the baffle B as a non-slip fluid for accelerating the liquid to be treated in the rotation direction as the rotation was performed. The supplied liquid to be treated is prevented from sliding in the circumferential direction of the partition plate P1 due to the influence of the rotational angular velocity, and the liquid to be treated is kept at a substantially constant velocity with respect to the liquid to be treated in the rotating settling layer 5. This prevents rapid agitation and mixing of the liquids to be treated at the time of introduction. In the separation plate type centrifugal separator, as shown in FIG. 1, the partition plate P1 has a bent cross section, and by increasing the radial distance of the introduction gap S, the separation of the liquid to be treated can be improved. Rotational acceleration can be further promoted.

In this way, the separator-type centrifugal separator can separate a continuously supplied liquid to be processed into a solid and a clarified liquid with high separation efficiency. For example, the solid content close to the specific gravity of the liquid Of liquid to be treated and liquid containing particles with a diameter of 1 μm or less that were difficult to separate with conventional equipment. Can be

Further, in the separator centrifuge, the introduction means includes a partition plate P 1 that forms a gap S for introducing the liquid to be treated and an opening T for introduction between the lower surface and the inner surface of the separation chamber 2. Therefore, for example, it is possible to realize an introduction means without significantly modifying an existing centrifuge, and to provide a centrifuge with high separation efficiency easily and inexpensively. It becomes.

The separation plate type centrifuge is provided with sensors for detecting the turbidity of the liquid to be treated in appropriate places such as the separation chamber 2 and the recovery space 15, and the separation progress is determined based on the turbidity. If it is determined that the separation is not sufficient, adjust the flow rate of the liquid to be treated or stop the supply to prolong the residence time of the liquid to be treated in the separation chamber 2 and control it so that sufficient separation is performed. Is also possible. FIG. 3 is a view for explaining another embodiment of the separation plate type centrifuge according to the present invention. The same components as those in the previous embodiment are denoted by the same reference numerals, and detailed description is omitted.

In the illustrated separator-type centrifuge, the introduction means is a means for introducing the liquid to be treated into the sedimentation layer 5 from the introduction opening T located near the outermost peripheral portion A of the sedimentation layer 5 in the separation chamber 2. In contrast, in the above embodiment, the partition plate (P 1) is provided below the separation plate 3, whereas in this embodiment, the upper inner surface of the separation chamber 2 is provided above the separation plate 3. A partition plate P2 that forms a gap S for introduction of the liquid to be treated and an opening T for introduction is provided between them.

As shown in FIG. 4, the partition plate P 2 has an umbrella shape along the lower surface of the ball cover 7, and has a supply space 31 for the liquid to be treated and a radius from the supply space 31 on the upper part. A supply flow path 32 communicating in the direction and a recovery flow path 33 connecting the recovery space 15 and the centripetal pump 20 are formed. The partition plate P 2 has a plurality of (preferably three or more) baffles B on its upper surface (outer peripheral surface) as a non-slip fluid for accelerating the liquid to be processed in the rotational direction as it rotates. They are provided radially and at equal intervals in the circumferential direction.

The partition plate P 2 is mounted between the cylindrical portion 8 a of the guide tube 8 and the ball cover 7 so as to cover the uppermost separation plate 3. At this time, the supply space 31 of the partition plate P 2 is The lower side is closed by a plug 34 fitted to the upper end of the cylindrical portion 8a. The lower end of the supply pipe 13 is located above the supply space 31 opened upward.

In the separator-type centrifugal separator having the above configuration, the liquid to be treated supplied from the supply pipe 13 is supplied to the supply space 31, the supply flow path 32, the introduction gap S, and the introduction opening T. In this embodiment, too, the liquid to be treated is introduced into the outermost peripheral portion A of the sedimentation layer 5 of the separation chamber 2 where solids are settled and deposited. Since the plate P2 has the baffle B which is a non-slip for fluid, the same operation and effect as in the previous embodiment can be obtained.

Further, in the case of the above embodiment, it is also possible to adopt a configuration in which the liquid to be treated is directly introduced into the upper surface of the partition plate P2, so that the structure of the upper end of the partition plate P2 can be simplified. Can be something.

FIG. 5 is a view for explaining still another embodiment of the separation plate type centrifuge according to the present invention. Note that the same components as those in the previous embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the illustrated separator-type centrifuge, the liquid to be treated is supplied from the upper side in each of the above embodiments, whereas the liquid to be treated is supplied from the lower rotating shaft 1. . The rotating shaft 1 has a liquid supply system

(Showing the opening 41). On the other hand, the shaft portion 6a of the ball body 6 has an annular supply passage 42 formed between the rotating shaft 1 and the radial supply passage 42 communicating the annular supply passage 42 with each of the distribution ports 11. The supply channel 43 is formed. In addition, the partition plate P1, which is an introduction means, has the configuration of the embodiment shown in FIG. Is the same as

The separation plate type centrifugal separator having the above-described configuration supplies the liquid to be processed from the rotating shaft 1 to the annular supply flow path 42, and supplies the liquid to be processed from the radial supply flow path 43 to each distribution port 1 1 To the sedimentary layer 5 in the separation chamber 2 from the introduction gap S and the introduction opening T of the partition plate P1, and this embodiment is also the same as the previous embodiment. The effect and effect of the above can be obtained.

The detailed structure of the separation plate type centrifuge according to the present invention is not limited to only the above-described embodiments. In particular, the introduction means is provided for stirring in a violent turbulent state such as a jet jet. The partition plate described in the embodiment can be provided on both the upper and lower sides of the separation chamber as long as it does not promote the separation and does not hinder good sedimentation and separation of the liquid to be treated. In addition, in addition to providing a partition plate, a plurality of pipes may be radially provided.

Further, the fluid non-slip acting on the liquid to be treated in the introduction gap may be provided on the inner surface of the separation chamber, and grooves other than the baffle described in the embodiment may be employed. Grooves can be combined, formed in a curved shape, and changed in length and number. Further, in each of the above-described embodiments, the case where the liquid to be treated containing the solid content is separated is illustrated, but the liquid to be treated containing the liquids having different specific gravities may be separated. Industrial applicability

ADVANTAGE OF THE INVENTION According to the separation plate type centrifuge of this invention, the solid content (or heavy liquid) which settles in a sedimentation layer, and the clarified liquid which moves in the rotation axis direction are hardly affected by the introduced liquid to be processed. The liquid to be treated can be satisfactorily separated into a solid content and a clarified liquid. Even in the case of separation treatment, the separation efficiency can be greatly increased.In addition, according to the separation plate type centrifugal separator of the present invention, solids that settle in the sedimentation layer and clarified liquid that moves in the direction of the rotation axis are removed. Thus, the influence of the introduced liquid to be treated can be further reduced, and the separation efficiency of the liquid to be treated can be further increased.

Furthermore, according to the separator centrifuge of the present invention, the introduction means can be realized by the upper and lower at least one partition plate without significantly modifying the existing separator centrifuge. Thus, it is possible to easily and inexpensively provide a separation plate type centrifuge having high separation efficiency.

Further, according to the separator type centrifugal separator of the present invention, the liquid to be introduced is introduced at a nearly constant speed with respect to the liquid to be treated in the rotating sedimentation layer. Prevents rapid agitation and mixing of treatment liquids, and further reduces the influence of the introduced liquid on solids that settle in the sedimentation layer and clarified liquid that moves in the direction of the rotation axis. Further improvement in efficiency can be realized.

ADVANTAGE OF THE INVENTION According to the partition plate for centrifugal separators of the present invention, the liquid to be treated supplied to the center of rotation of the rotor can be separated from the outer peripheral portion of the centrifuge without significantly modifying the existing centrifuge for centrifugal separators. It is possible to realize a structure that can be introduced into the sedimentation layer of the separation chamber from the introduction opening located on the radially outer side, whereby solids that settle in the sedimentation layer and clarified liquid that moves in the rotation axis direction are introduced. The separation efficiency of the liquid to be treated can be improved by making the liquid less susceptible to the liquid to be treated.

Further, according to the partition plate for a centrifugal separator of the present invention, the liquid to be introduced is introduced into the rotating liquid to be treated in the sedimentation layer at a nearly constant velocity, Prevents rapid agitation and mixing of the liquids to be treated at the time of introduction. Introduces solids that settle in the sedimentation layer and clearing liquid that moves in the direction of the rotation axis. The effect of the liquid to be treated can be further reduced, and the separation efficiency can be further improved. In addition, it is possible to prepare a partition plate having different non-slip for fluid and selectively use it according to the type of the liquid to be treated, the treatment speed, the target separation ability, and the like.

Claims

The scope of the claims

1. Separation plate type centrifuge equipped with a separation layer containing a plurality of separation plates vertically stacked in a separation chamber provided around the rotation axis of the rotor, and a sedimentation layer continuous on the outer periphery of the separation layer Wherein the separation means is provided with an introduction means for introducing the liquid to be processed supplied to the rotation center of the rotor from the introduction opening located radially outside the outer periphery of the separation plate into the sedimentation layer of the separation chamber. Plate centrifuge.

2. The separation plate type centrifuge according to claim 1, wherein the introduction opening of the introduction means is located near the outermost periphery of the sedimentation layer of the separation chamber.

3. The introduction means is arranged on at least one of the upper side and the lower side of the stacked separation plates with the rotation axis as the center, and the gap for introducing the liquid to be treated and the opening for introduction between the separation chamber and the inside of the separation chamber. The separator centrifuge according to claim 1 or 2, further comprising a partition plate forming a part.

4. A non-slip fluid for accelerating the liquid to be treated in the introduction space in the rotation direction with rotation of at least one of the partition plate and the inner surface of the separation chamber. A centrifugal separator according to claim 1.

5. Separation plate type centrifuge equipped with a separation layer that accommodates a plurality of separation plates vertically stacked in a separation chamber provided around the rotation axis of the rotor, and a sedimentation layer that is continuous on the outer peripheral side of the separation layer A partition plate that introduces the liquid to be processed, which is supplied to the center of rotation of the rotor, into the sedimentation layer of the separation chamber from a position radially outside the outer periphery of the separation plate, and has a larger diameter than the separation plate. Yes, it is arranged around the rotation axis on one of the upper side and the lower side of the stacked separation plates, and the gap for introducing the liquid to be treated and the opening for introduction are provided between the separation plates and the inner surface of the separation chamber. A separating plate for a centrifugal separator, wherein the separating plate is formed.

6. The separation plate type according to claim 5, wherein a fluid non-slip for accelerating the liquid to be treated in the rotation direction with the rotation is provided on the surface on the side of the introduction gap. Partition plate for centrifuge.