SEPARATOR, SEPARATOR STACK AND CENTRIFUGE WITH SEPARATOR STACK

Description

[0001] The present invention relates to a separating plate according to the preamble of claim 1, a separating plate stack comprising these separating plates according to claim 15 and a centrifuge with such a separating plate stack according to claim 18.

[0002] Centrifuges with a separation disc—also called separators—can be designed as separators or clarifiers. Separators are designed to separate liquid mixtures consisting of two more fluid phases and a solid phase into these phases. Clarifiers are used to separate solids from a fluid phase.

[0003] For this purpose, the liquid mixture to be processed is fed into the centrifuge's bowl via a central inlet pipe. From there, the liquid mixture enters a distributor, which accelerates the mixture to the bowl speed and directs it into a separation chamber within the bowl. The liquid mixture rises through riser channels located inside or on the outer edge of a stack of separation plates into a stack of separation plates. Here, conical separation plates arranged one above the other, each equipped with radially arranged spacers, create annular gaps / chambers for separating or clarifying the liquid mixture.

[0004] The spacer tabs are designed with different axial thicknesses depending on the product. The riser channels are usually designed as circular holes or elongated holes and placed in a separation zone.

[0005] In treatment applications involving solids, the separation plate stack serves only or possibly also to separate the solids.

[0006] For the separation discs used for clarification, the separation zone located on the outer diameter of the disc results in rising areas on the outside of the disc's outer diameter. Accordingly, such separation discs can be provided with recesses on the outer circumference, which form the rising channels or rising areas in the separation disc stack. Separation discs that form semicircular rising channels, for example, are also referred to in technical terms as "externally slotted" separation discs.

[0007] For separator applications where two liquids of different densities, and possibly also solids, are to be separated, the riser channels are usually located further inside the separation disc stack. This provides sufficient clarification surface for both the lighter and heavier liquids. The majority of the incoming suspension flows through the riser channel into the separation disc stack. The heavier liquid is discharged at the outer diameter of the disc.

[0008] The irregularities in the gap flow caused by the sludge chamber flow can also be reduced by additional rib arrangements outside the disc pack, thus also reducing the resuspension of any solid particles present. These ribs are mounted in the drum in a rotationally fixed manner, meaning they rotate at the drum speed, and their position relative to the distributor channels is fixed, as described in DE 32 01 866 C2 and DE 10 2004 042 888 A1.

[0009] The liquid mixture is fed to the disc insert through the rising channels in the separation zone. The separated solids are propelled outward by centrifugal force and discharged through discharge openings in the solids chamber, which extends from the outer disc diameter to the largest inner diameter of the bowl. The liquid with a lower specific gravity leaves the disc insert via an outlet at the inner diameter. The liquid with a higher specific gravity is directed upwards at the outer diameter of the disc insert and, for example, via a separating disc to another outlet.

[0010] WO 2009 / 138196 A1 discloses a generic separating plate. WO 2009 / 108 046 A1 and WO 2016 / 046 944 A1 are also cited as prior art.

[0011] A structurally simple and cost-effective implementation of flow optimization at the outer diameter of the separation plate stack is desirable in order to increase the separation efficiency of the separation plate stack.

[0012] The solution to this problem is the object of the invention.

[0013] The object is achieved with a separation plate according to claim 1. Furthermore, the invention also provides the separation plate stack according to claim 15 and a centrifuge with such a separation plate stack according to claim 18.

[0014] Accordingly, a separation plate for a centrifuge, in particular for a separator, is created, wherein the separation plate is intended to be arranged in a separation plate stack in a drum interior of a drum of the centrifuge for clarifying or separating a mixture of substances, wherein the separation plate has a truncated cone-like base body created in a forming process with a smaller diameter d and a larger diameter D relative thereto, as well as an inner surface and an outer surface and has at least one or more spacers which are designed in the form of a tab, wherein on the large diameter D of the base body, a plurality of radially outer projections are arranged circumferentially distributed in the region of the spacers and the respective projection is arranged as an extension of the outer surface of the base body of the separation plate.

[0015] The spacers are arranged in the form of tabs at an angle α to the surface line M, where a. the projections are arranged at an angle α to the surface line M and in that in the region of the projection the respective tab follows the angular orientation of the projection so that the respective tab runs in a line with the projection, or b. wherein in the region of the projection the respective tab is angled by the complementary angle β of the angle α so that the respective tab has a first section and a second section.

[0016] The respective projection preferably has the same cone angle relative to the axial axis of the separating plate as the truncated cone-like base body of the separating plate.

[0017] To create segmentation of the riser channels in the separation plate stack, it is now advantageously no longer necessary to introduce additional ribs outside the plate stack into the separation chamber of the drum. Instead, the advantageous segmentation of the riser channels is achieved by the projections and the spacers in the form of tabs on or attached to the projections on the separation plate.

[0018] A special effect of the segment-like channels thus formed on the outer edge of the separation plate stack is an improved supply or channeling of the suspension or product to be separated into the separation plate stack and thus into the gap formed between two basic bodies of superimposed separation plates in the separation plate stack, as well as a reduction of the resuspension due to disturbing flows induced by sludge or solids.

[0019] According to a particularly preferred embodiment of the invention, the arrangement of the projections on the circumference of the base body of the separating plate in the region of the large diameter D can be arranged with the same pitch as the arrangement of the spacers. This results in pronounced segment-like channels on the outer circumference of the separating plate stack due to the overlapping separating plates.

[0020] According to a particularly preferred embodiment of the invention, the respective projection can have the same cone angle relative to the axial axis of the separating plate as the truncated cone-like base body of the separating plate. This results in a separating plate stack with segmentation by the spacers even in the area of ​​the projection.

[0021] According to a further particularly preferred embodiment of the invention, it can be provided that the projections in the region of the large diameter D of the base body result in segment-like zones between the projections.

[0022] The segment-like zones on the separation disc, formed by the projections in conjunction with the spacers or tabs, advantageously make the flow profile at the large diameter D of the separation disc stack more homogeneous and steady. The suspension or product is thus more precisely directed into a separation segment created by the projections and the spacers in the form of tabs, allowing for better utilization of the available clarification area of ​​each separation disc. The more effectively utilized clarification area can advantageously increase the centrifuge's separation efficiency.

[0023] Furthermore, according to a preferred embodiment of the invention, semicircular cutouts, for example, are arranged circumferentially distributed on the large diameter D of the truncated cone-shaped base body. The cutouts are structurally simple and easy to manufacture.

[0024] According to a further preferred embodiment of the invention, the cutouts can also be located approximately in the center of the respective segmented zone. Depending on the flow behavior of the suspension to be separated in the stack of separating plates, it may also be advantageous to arrange the cutouts in the right or left area of ​​the segmented zone. This advantageously makes the flow profile at the cutouts of the separating plate more homogeneous and stationary.

[0025] Furthermore, according to another preferred embodiment of the invention, each individual spacer can have a continuous length that approximately corresponds to the length of the generatrix line M on the outer surface of the frustoconical base body plus the length of the respective projection. This effectively segments the flow in the separating plate stack in a structurally simple and thus advantageous manner.

[0026] According to a further particularly preferred embodiment of the invention, it can be provided that the spacers in the form of tabs are arranged at an angle α to the surface line M. As a result, the position of the spacers on the base body of the respective separating plate can be designed in a flow-optimized manner depending on the requirements for the product to be separated.

[0027] According to a further particularly preferred embodiment of the invention, it can be provided that the projections are arranged at an angle α to the surface line M. As a result, the position of the projections on the base body of the respective separating plate can also be designed in a flow-optimized manner depending on the requirements for the product to be separated.

[0028] Furthermore, according to a preferred embodiment of the invention, the respective tab in the region of the projection follows the angular orientation of the projection, so that the respective tab runs in line with the projection. This achieves an effective segmentation of the flow in the separating plate stack in a structurally simple and thus advantageous manner.

[0029] According to a further preferred embodiment of the invention, it can also be provided that, in the area of ​​the projection, the respective tab is angled by the complementary angle β of the angle α, so that the respective tab has a first section and a second section. This provides a structurally simple possibility for the respective tab to be flexibly adapted to the respective requirements.

[0030] Furthermore, according to a further preferred embodiment of the invention, it can be provided that in the region of the projection the respective tab follows the angular orientation of the projection, so that the second section of the respective tab runs in line with the projection.

[0031] According to another particularly preferred embodiment of the invention, the respective projection can be formed integrally onto the base body or attached to the base body by a joining process. This creates structurally simple and easily implemented possibilities for the realization of the projection.

[0032] Furthermore, according to a preferred embodiment of the invention, the base body of the separating plate can be preferably manufactured by a spinning process. This ensures that the separating plate is manufactured using a proven forming process.

[0033] According to a further preferred embodiment of the invention, the base body of the separating plate can also be made of a metallic material, preferably steel. This ensures that the separating plate can reliably withstand the forces acting on it during centrifuge operation.

[0034] Furthermore, according to another preferred embodiment of the invention, the separating plate can have a driver geometry at the smaller diameter d of the truncated cone-shaped base body. This creates a secure, form-fitting connection between the centrifuge's distributor shaft and the respective separating plate in a simple design.

[0035] According to another particularly preferred embodiment of the invention, the cross-sectional geometry of the spacers can be rectangular, trapezoidal rectangular, rectangular with rounded corners, semi-elliptical, or semi-oval. This advantageously results in various possibilities for the manufacturing of the spacer as well as a flow-optimized design.

[0036] The object is also achieved by a separating plate stack which has a plurality of separating plates according to the invention.

[0037] Furthermore, the object is also achieved by a centrifuge, in particular a separator or a solid bowl screw centrifuge, wherein a stack of separating plates made of separating plates according to the invention is inserted into the drum interior of the drum of the centrifuge.

[0038] Further advantageous embodiments of the invention can be found in the subclaims.

[0039] The invention is described in more detail below using exemplary embodiments with reference to the figures. The invention is not limited to these exemplary embodiments but can also be implemented in other ways or equivalently within the scope of the claims. They show: Figure 1: a schematic representation of a centrifuge in full section; Figure 2: in a) a plan view of an embodiment of a separating plate not falling under claim 1, in b) a 3D view of the separating plate from Fig. 2a ; Figure 3: in a) a plan view of an embodiment of a separating plate according to the invention, in b) a plan view of the separating plate from Fig. 3a ; Figure 4: in a) a plan view of a further embodiment of a separating plate according to the invention, in b) a plan view of the separating plate from Fig. 4a ; Figure 5: in a) a plan view of a further embodiment of a separating plate according to the invention, in b) a plan view of the separating plate from Fig. 5a ;

[0040] Fig. 1 shows a rotatable drum 1 of a centrifuge 2, which is designed here as a separator for clarification applications with solids with a vertical axis of rotation A. The centrifuge 2 has - in a manner known per se - in addition to the drum 1, further components - not all of which are shown here - such as a control computer, a drive motor for rotating the drum, a hood, a frame, a solids catcher, etc.

[0041] The drum 1, which is rotatable by a self-driven and rotatably mounted drive spindle, is preferably - but not necessarily - designed for continuous operation - ie the continuous and not batchwise processing of a product.

[0042] The drum 1 consists of a lower part 3 and an upper part 4. In A piston valve 5 can be inserted into the lower part 3 to open solid discharges 14 if necessary. These can also be designed as non-closable nozzles for continuous discharge.

[0043] In the drum 1, which is preferably designed for continuous operation, here in the internally conical or even double-conical drum 1, a separating plate stack 7 consisting of several separating plates 8 is arranged in a drum interior 6. Between an inner wall of the lower part 3 of the drum 1 and a radial outer side of the separating plate stack 7, an annular sludge or solids space 16 is formed in the drum 1.

[0044] The separating discs 8 can be arranged on a distributor shaft 9 of a distributor 10 or can be mounted on the distributor shaft 9 coaxially to the rotational axis A. An inlet pipe 11 serves to supply a product to be processed. The inlet pipe 11 is designed here as a stationary element that does not rotate during operation. It extends concentrically to the rotational axis A into the drum 1.

[0045] After Fig. 1 In a preferred - but not mandatory - embodiment, it projects from above into the drum 1. However, it can also extend from below into the drum 1. The product emerging from the free end of the inlet pipe 11 flows into essentially radially extending distribution channels 12 of the distributor 10 and is rotated therein as a result of the rotations of the rotating drum 1 or is accelerated in the circumferential direction.

[0046] The distribution channels 12 open into the drum interior 6 with the separation plate stack 7. In the drum interior 6 - also called centrifuge chamber - a clarification of a product from solids and a separation into one, two or more liquid phases of different densities takes place. In the example of the Fig. 1 A product of solids and a liquid phase L1 is clarified in the drum interior 6. One or more outlets for liquid phases serve to discharge the at least one liquid phase L1, here purely as an example a liquid phase L1.

[0047] The liquid flowing radially inward from the separation plate stack 7 flows into a paring disc chamber 15, which rotates with the drum 1 and is designed here as the upper, closing part of this drum 1. A paring disc 13 is arranged in the paring disc chamber 15. The paring disc 13 operates according to the principle of a centripetal pump and accordingly conveys the liquid phase L1 to the outside. However, the liquid outlets from the drum 1 can also be designed in a different way.

[0048] Inlet and outlet lines in and out of the drum 1 can be open, semi-closed, hydrohermetic or hermetic (see "Industrial Centrifuges", Volume II, Chapter 6.9 by Werner H. Stahl).

[0049] The solids collect in the solids chamber 16. The solids are ejected outwards from the drum 1 through circumferentially distributed, radially extending outlet openings 14, preferably in the region of the largest radius / circumference of the drum 1.

[0050] After Fig. 1 A hydraulically actuated piston valve 5 can be provided for the solids outlet in the lower part 3, with which the outlet openings 14 can be discontinuously opened and closed again. The solids outlet can also be designed differently than shown here, e.g., in the form of outlet nozzles. If necessary, a solids outlet can also be omitted.

[0051] Alternatively, the separator can also be designed for separation applications, i.e., for the centrifugal separation of two liquids, where solids can also be separated. It could also be designed for batch operation. Furthermore, the centrifuge could also be a solid-bowl screw centrifuge or a decanter centrifuge, which has a separation plate stack 7 for further clarification of the liquid phase.

[0052] Fig. 2a shows a separating plate 8 according to the invention for the centrifuge 2, which is designed here as a clarifier (see Fig. 1 ). The separating plate 8 has a truncated cone-like base body 81. The base body 81 of the separating plate 8 is preferably manufactured from a metallic material—preferably steel—through a forming process. This ensures that the separating plate 8 permanently withstands the forces acting on it during operation of the centrifuge 2.

[0053] The separating plate 8 can have a driver geometry (not shown here) on a smaller diameter d of the truncated cone-shaped base body 81. Such a driver geometry is part of a non-rotatable form-fitting connection between the respective separating plate 8 and the distributor shaft 9, which geometrically corresponds to the driver geometry (see Fig. 1 ), which is arranged coaxially to the axis of rotation A within the centrifuge chamber of the centrifuge 2 and onto which several separation plates 8 are placed during assembly of the drum 1 until a designated stack of separation plates 7 is formed.

[0054] The separating plate 8 here has a plurality of spacers 83 on an outer surface 82 of the base body 81. The spacers 83 can, for example, be placed on the base body 81 so that another separating plate 8 rests with an inner surface on the spacers 83. In this way, a space or gap separated by the respective spacers 83 and thus segmented is created between two separating plates 8 in the separating plate stack 7.

[0055] Alternatively, the spacers 83 can also be arranged on an inner surface of the base body 81. In a further alternative embodiment, the spacers 83 can be arranged on both the outer surface 82 and the inner surface of the base body 81.

[0056] The cross-sectional geometry of the spacers 83 can be, for example, rectangular, trapezoidal rectangular, rectangular with rounded corners, semi-elliptical, semi-oval, or have another advantageous geometry. The cross-sectional geometry of the spacers 83 can also be asymmetrical.

[0057] The spacers 83 are in the embodiment of the Fig. 2a und Fig. 2b in the form of elongated tabs 84 arranged symmetrically to and along a surface line M or parallel to the surface line.

[0058] The term "mantle line" refers to such a line which is constructed perpendicularly to two parallel tangents, wherein the tangents each touch / tangent the small diameter d of the truncated cone-shaped base body 81 and a large diameter D of the truncated cone-shaped base body 81.

[0059] The geometry of the spacers 83 on the base body 81 of the separating plate 8 can vary. Accordingly, differently shaped spacers 83 can also be arranged on the base body 81. The dimensions—e.g., width, thickness, and length—of the spacers 83 on a separating plate 8 can also vary.

[0060] Likewise, the cross-sectional geometry of the spacers 83 can vary.

[0061] The tabs 84 and thus the spacers 83 are distributed here, for example, in a uniform pitch on the circumference of the base body 81, here on the outer surface 82 of the base body 81. The spacers 83 can also be arranged in a non-uniform pitch or variable pitch or in repeating - i.e. regular - pitch patterns or in non-repeating - i.e. irregular - pitch patterns on the circumference of the base body 81.

[0062] The spacers 83 and thus the tabs 84 are spaced apart here by equally long gaps 85 between the tabs 84. The gaps 85 can also be of different lengths in the circumferential direction and / or can be of different sizes from tab 84 to tab 84. The tabs 84, which are arranged symmetrically to and along or parallel to the surface line M, can also vary in length.

[0063] For example, semicircular cutouts 86 are arranged / formed circumferentially distributed on the large diameter D of the truncated cone-shaped base body 81. The distribution of the cutouts 86 on the circumference can be carried out in a uniform division, as shown in Fig. 2b is shown, alternatively the distribution of the sections 86 can also be carried out in an unequal - i.e. variable - division.

[0064] The cutouts 86 each form a type of rising channel 17 in the separation plate stack 7 of superimposed separation plates 8. The respective rising channel 17 can run parallel to the axis A of the centrifuge 2 or along a helical line around the axis A. The respective rising channel 17 serves for the ascent of the liquid phase L1. In this respect, the separation plate 8 in Fig. 2a und 2b a separation plate 8 for clarification applications, in which the largest possible separation zone is provided for the discharge of the liquid phase L1 and, accordingly, the separation zone between the liquid phase L1 and the solid lies in the region of the large diameter D of the separation plate 8.

[0065] Furthermore, projections 87 are arranged circumferentially distributed on the large diameter D of the truncated cone-shaped base body 81. Each projection 87 is designed such that it is arranged in a line or as an extension of the outer surface 82 of the base body 81 of the separating plate 8. Thus, each projection 87 has the same cone angle relative to the axial axis of the separating plate as the truncated cone-shaped base body 81 of the separating plate 8.

[0066] In other words, the respective projection 87 is formed onto the base body 81 without a step relative to the base body or an angle. The respective projection 87 can be formed integrally onto the base body 81 or attached to the base body 81 by a joining process.

[0067] Furthermore, it can be provided that the projections 87 protrude into the solids chamber 16 of the drum 1 by 25% to 75% based on a distance R FR between the radius R1 of the base body 81 of the separating plate 8 without the projection 87 and the outer diameter of the solids chamber 16 in the region of the separating plate stack 7. Since the inner contour of the drum 1 is conical or double-conical in this region, the value R FR is not constant over the axial extent of the separating plate stack 7. Thus, both the length of the respective projections can be designed differently and the distance between the respective projections and the outer diameter of the solids chamber can vary.

[0068] The projections 87 result in arcuate segment-like zones 88 in the circumferential direction between the projections 87 in the area of ​​the large diameter D of the base body 81. In this embodiment, the cutouts 86 are located approximately in the middle of the respective segment-like zone 88, as shown in Fig. 2a and in Fig. 2b Depending on the flow behavior of the suspension to be separated in the separation plate stack 7, it may also be advantageous to arrange the cutouts 86 in the right or left area of ​​the segment-like zone 88.

[0069] In order to form a suitable segmentation of the rising channels in the separating plate stack 7, it is now advantageously no longer necessary to introduce additional rib bodies outside the separating plate stack 7 into the separating space 6 of the drum 1. Rather, the advantageous segmentation of the rising channels in the separating plate stack 7 is created by the projections 87 and the resulting segment-like zones 88, the cutouts 86 and the applied spacers 83 in the form of tabs 84 on or on the separating plate 8.

[0070] The effect of the rising channels or the segment-like zones 88 on the outer edge of the separation disc stack is an improved supply or channeling of the suspension or product to be separated into the separation disc stack and thus into the gap formed between two base bodies 81 of superimposed separation discs 8 in the separation disc stack 7, as well as a reduction in resuspension due to disruptive flows induced by sludge or solids. The segment-like zones 88 advantageously make the flow profile at the large diameter D of the separation disc stack 7 more homogeneous and stationary. The suspension or product is thus more specifically fed into a separation segment created by the spacers 83 in the form of tabs 84 and can better utilize the available clarification area of ​​the respective separation disc 8. The better utilized clarification area can advantageously increase the separation efficiency of the centrifuge 2.

[0071] The arrangement of the projections 87 on the circumference of the base body 81 of the separating plate 8 in the area of ​​the large diameter D can therefore be as in Fig. 2a und Fig. 2b shown, advantageously with the same pitch as the arrangement of the spacers 83, which here are designed as tabs 84. As a result, the projections 87 are designed as an extension of the tabs 84. This is advantageous as described above, but not mandatory.

[0072] Each individual spacer 83, which is designed here as a tab 84, can have a continuous length which can correspond exactly or substantially to the length of the surface line M on the outer surface 82 of the frustoconical base body 81 plus the length of the respective projection 87.

[0073] The respective projection 87 has the same cone angle relative to the axial axis of the separating plate as the truncated cone-like base body 81 of the separating plate 8.

[0074] In the Fig. 3a und Fig. 3b a variant of a separating plate 8 according to the invention is shown. In this variant, too, the spacers 83 in the form of tabs 84 are applied to the outer surface 82 of the base body 81 of the separating plate 8 in an equal pitch on the circumference of the base body 81 of the separating plate 8. Deviating from the variant according to Fig. 2a und Fig. 2b the spacers 83 in the form of tabs 84 are arranged at an angle α to the surface line M. The value of the angle α is preferably between 10° and 60°, particularly preferably between 20° and 45°.

[0075] The tabs 84 are here - analogous to the design variant according to Fig. 2a und Fig. 2b distributed in a uniform division on the circumference of the base body 81, here on the outer surface 83 of the base body 81.

[0076] It is available in the version according to Fig. 3a und Fig. 3b It is provided that the projections 87 are arranged at an angle α to the surface line M. In the region of the projection 87, the respective tab 84 follows the angular orientation of the projection 87, so that the respective tab 84 runs in line with the projection 87. The angle α is preferably between 10° and 60°. This also applies to further embodiments where this angle occurs.

[0077] Each individual tab 84 here has a continuous length which extends from the small diameter d of the base body 81 of the separating plate 8 to the large diameter D of the base body 81 of the separating plate 8 plus the length of the projection 87 which is arranged at an angle here.

[0078] The respective projection 87 has the same cone angle relative to the axial axis of the separating plate as the truncated cone-like base body 81 of the separating plate 8.

[0079] In the Fig. 4a und Fig. 4b A further embodiment of a separating plate 8 according to the invention is shown. In this variant, too, the spacers 83 in the form of tabs 84 are applied to the outer surface 82 of the base body 81 of the separating plate 8 in an equal pitch on the circumference of the base body 81 of the separating plate 8. Deviating from the embodiment according to Fig. 2a und Fig. 2b and analogous to the design variant according to Fig. 3a und Fig. 3b the spacers 83 in the form of tabs 84 are arranged at an angle α to the surface line M.

[0080] The tabs 84 are here - analogous to the design variant according to Fig. 2a and Fig. 2b distributed in a uniform division on the circumference of the base body 81, here on the outer surface 82 of the base body 81. Each individual tab 84 has a continuous longitudinal extension that extends from the small diameter d of the base body 81 of the separating plate 8 to the large diameter D of the base body 81 of the separating plate 8.

[0081] It is also available in the version according to Fig. 4a und Fig. 4b provided that the projections 87 are arranged along or parallel to the surface line M.

[0082] In the area of ​​the projection 87, the respective tab 84 is therefore angled by the complementary angle β of the angle α, so that the respective tab 84 has a first section 841 and a second section 842.

[0083] The respective projection 87 has the same cone angle relative to the axial axis of the separating plate as the truncated cone-like base body 81 of the separating plate 8.

[0084] In the Fig. 5a und Fig. 5b A further embodiment of a separating plate 8 according to the invention is shown. In this variant, too, the spacers 83 in the form of tabs 84 are applied to the outer surface 82 of the base body 81 of the separating plate 8 at an equal pitch on the circumference of the base body 81 of the separating plate 8.

[0085] Deviating from the design variant according to Fig. 2a und Fig. 2b the spacers 83 in the form of tabs 84 are each arranged starting from the small diameter d of the base body 81 of the separating plate 8, here in a first section 841 initially along or parallel to the surface line M, in order to continue here after this first section 841 in the second section 842 arranged at an angle α to the surface line M up to the large diameter D of the base body 81 of the separating plate 8.

[0086] The tabs 84 are here - analogous to the design variant according to Fig. 2a und Fig. 2b - distributed in a uniform division on the circumference of the base body 81, here on the outer surface 82 of the base body 81.

[0087] According to the example according to Fig. 5a und Fig. 5b It can be provided that the projections 87 are arranged at the angle α to the surface line M. In the region of the projection 87, the respective tab 84 follows the angular orientation of the projection 87, so that the second section 842 of the respective tab 84 runs in line with the projection 87.

[0088] The respective projection 87 has the same cone angle relative to the axial axis of the separating plate as the truncated cone-like base body 81 of the separating plate 8. List of reference symbols

[0089] 1Drum 2Centrifuge 3Lower section 4Upper section 5Piston valve 6Drum interior 7Separator plate stack 8Separator plate 81Main body 82Outer surface 83Spacer 84Tab 841Section 842Section 85Gap 86Cutout 87Protrusion 88Segment-like zone 9Distributor shaft 10Distributor 11Inlet pipe 12Distributor channel 13Paring disc 14Outlet opening 15Paring disc chamber 16Solids chamber 17Rising channel ARotation axis DDiameter dDiameter L1Liquid phases MGenerator line R 1 Radius R FR Distance αAngle βComplementary angle

Claims

1. Separation disc (8) for a centrifuge (2), in particular for a separator, wherein the separation disc (8) is provided to be arranged in a separation disc stack (7) in a drum interior (6) of a drum (1) of the centrifuge (2) for clarifying or separating a mixture of substances, wherein the separation disc (8) has a frustoconical shell-like main body (81) which is created in a forming process and has a smaller diameter d and a large diameter D, as well as an inner surface and an outer surface (82) and has at least one or more spacers (83), wherein radial outer projections are arranged circumferentially distributed on the large diameter D of the main body (81) in the region of the spacers and the respective projection (87) is arranged in extension of the outer surface (82) of the main body (81) of the separation disc (8), characterized in that the spacers (83) are arranged in the form of tabs (84) at an angle α to the surface line M, wherein a. the projections (87) are arranged at the angle α to the surface line M and that in the region of the projection (87), the respective tab (84) follows the angular orientation of the projection (87), so that the respective tab (84) extends in a line with the projection (87), or b. in the region of the projection (87), the respective tab (84) is designed to be angled by the complementary angle β of the angle α, so that the respective tab (84) has a first section (841) and a second section (842).

2. Separation disc (8) according to claim 1, characterized in that the arrangement of the projections (87) on the circumference of the main body (81) of the separation disc (8) in the region of the large diameter D is made with the same pitch as the arrangement of the spacers (83) on the separation disc.

3. Separation disc (8) according to one of the preceding claims, characterized in that the respective projection (87) has the same taper angle relative to the axial axis of the separation disc as the frustoconical shell-like main body (81) of the separation disc (8).

4. Separation disc (8) according to one of claims 1 to 3, characterized in that segment-like zones (88) are formed by the projections (87) in the region of the large diameter D of the main body (81) in each case between the projections (87).

5. Separation disc (8) according to one of the preceding claims, characterized in that cutouts (86) are arranged circumferentially distributed on the large diameter D of the frustoconical shell-like main body (81).

6. Separation disc (8) according to claim 5, characterized in that the cutouts (86) on the circumference of the main body (81) are made at a uniform pitch.

7. Separation disc (8) according to claim 5 or 6, characterized in that the cutouts (86) are each located approximately in the middle or in the right-hand region or in the left-hand region of the respective segment-like zone (88).

8. Separation disc (8) according to one of the preceding claims, characterized in that each individual spacer (83) has a continuous length which corresponds approximately to the sum of the length of the surface line M on the outer surface (82) of the frustoconical main body (81) plus the length of the respective projection (87).

9. Separation disc (8) according to one of the preceding claims, characterized in that the amount of the angle α is preferably between 10° and 60°, particularly preferably between 20° and 45°.

10. Separation disc (8) according to one of preceding claims, characterized in that, in the region of the projection (87), the respective tab (84) follows the angular orientation of the projection (87), so that the second section (842) of the respective tab (84) extends in a line with the projection (87).

11. Separation disc (8) according to one of the preceding claims, characterized in that the respective projection (87) is integrally formed on the main body (81) or is attached to the main body (81) by a joining process, wherein the main body (81) of the separation disc (8) is preferably produced by a spinning process.

12. Separation disc (8) according to one of the preceding claims, characterized in that the main body (81) of the separation disc (8) is made of a metallic material, preferably of steel and / or the separation disc (8) has a driver geometry on the smaller diameter d of the frustoconical main body (81).

13. Separation disc (8) according to one of the preceding claims, characterized in that the cross-sectional geometry of the spacers (83) is rectangular, trapezoidal rectangular, rectangular with rounded corners, semi-elliptical or semi-oval.

14. Separation disc (8) according to one of the preceding claims, characterized in that the spacers (83) are spaced apart by respective equal gaps (85) between the spacers (83).

15. Separation disc stack (7) for a centrifuge (2), in particular for a separator, characterized in that the separation disc stack (7) has a plurality of separation discs (8) according to one of claims 1 to 14.

16. Separation disc stack (7) according to claim 15, characterized in that the cutouts (86) in the separation disc stack (7) each form a riser channel (17).

17. Separation disc stack (7) according to claim 15, characterized in that segment-like channels are formed by the superimposed segment-like zones (88) parallel to the axis A of the centrifuge (2).

18. Centrifuge (2), in particular separator or solid drum screw centrifuge, characterized in that a separation disc stack (7) according to one of claims 15 to 17 is inserted into the drum interior (6) of the drum (1) of the centrifuge (2).

19. Centrifuge (2) according to claim 18, characterized in that the projections (87) project into the solids chamber (16) of the drum (1) by 25% to 75% with respect to a distance RFR between the radius R1 of the main body (81) of the separation disc (8) without projection (87) and the outer diameter of the solids chamber (16) of the drum (1) in the region of the separation disc stack (7).