EP3181231A1 - Drum lid of a solid bowl screw centrifuge - Google Patents
Drum lid of a solid bowl screw centrifuge Download PDFInfo
- Publication number
- EP3181231A1 EP3181231A1 EP16195749.3A EP16195749A EP3181231A1 EP 3181231 A1 EP3181231 A1 EP 3181231A1 EP 16195749 A EP16195749 A EP 16195749A EP 3181231 A1 EP3181231 A1 EP 3181231A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- drum cover
- section
- cover portion
- weir
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007787 solid Substances 0.000 title claims abstract description 19
- 230000003116 impacting effect Effects 0.000 claims 1
- 230000008093 supporting effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
- B04B2001/2083—Configuration of liquid outlets
Definitions
- the invention relates to a drum lid of a rotatable about a centrifuge axis drum of a solid bowl screw centrifuge, with a first drum cover portion in which there is at least one outlet opening at which a clarified medium from within the drum via a weir edge can flow outside the drum, and a second drum cover portion which is axially outwardly of the first drum lid portion and which rotatably supports the drum, and at least one third drum lid portion via which the first drum lid portion is statically connected to the second drum lid portion.
- Solid bowl centrifuges also known as decanters, separate with a drum rotating at high speed about a centrifuge axis, continuously flowable mixtures.
- the mixture of substances is separated within the drum in at least two phases, wherein a so-called pond, a light phase, usually a clarified medium, floating on a heavy phase, such as particles or sludge.
- the drum is closed at one of its two axial ends with a drum lid.
- the drum lid has several sections, which are usually designed in one piece or screwed or welded together and in pass each other.
- a first drum cover section there is at least one outlet opening, at which the clarified medium can flow from within the drum via a weir edge to the outside of the drum.
- This first drum cover portion is usually designed as a disc extending plate-shaped from radially inward to radially outward.
- a second drum cover portion is located, relative to the interior of the drum, viewed in the axial direction, outside the first drum cover portion and rotatably supports the drum therefrom.
- On or in this second drum lid section is usually a drum bearing.
- This third drum cover section is usually designed as a thickening or a thick-walled hollow cylinder through the interior or interior of which extends an inlet pipe for the substance mixture to be clarified or a drive shaft of a worm.
- the outlet opening is normally provided on the outside of the drum with a weir plate having a weir edge towards the outlet opening. This weir edge at the outlet port determines or regulates the ridge level or the puddle depth of the light phase within the drum.
- the invention has for its object to provide a drum lid of a solid bowl screw centrifuge, in which it is possible to set the at least one outlet radially inward to provide a large pond depth inside the drum.
- a drum lid of a drum of a solid bowl screw centrifuge rotatable about a centrifuge axis with a first drum cover portion in which there is at least one outlet opening at which a clarified medium can flow from within the drum via a weir edge to the outside of the drum, and with a second drum cover portion, viewed in the axial direction outside of or in front of the first Drum cover portion and the drum is designed to be rotatably supporting, and at least a third drum cover portion, via which the first drum cover portion with the second drum cover portion is statically connected, wherein the at least one third drum cover portion is radially outwardly with respect to the weir edge.
- the at least one third drum lid section viewed in the radial direction, is located radially inward with respect to the at least one weir edge there.
- the weir edge or weir edges is or are located so radially outside of this third drum cover portion.
- clarified medium can be correspondingly freely discharged radially outward. This free removal is basically necessary, because yes rotates the drum at high speed and accordingly the exiting medium is subject to high centrifugal force and therefore at the outlet based on the rotating drum cover immediately thrown radially outward.
- the invention makes use in this regard of the fact that the at least one third drum cover section does not necessarily have to extend over the entire circumference of the drum cover, but that there may remain free space outside the weir edges despite the third drum cover section radially outward through which the clarified medium then radially can flow outside.
- the solution according to the invention with its at least one third drum cover section, creates a supporting effect between the first and the second drum cover section, without requiring space radially inward from the weir edge or the weir edges.
- the term "radially outward viewed radially” does not mean that the third drum cover section lies on one and the same radius or radial beam on the outside of the weir edge, but only that it is located on a circular ring which lies radially further outward. so has a larger radius than a circular ring radially further inside, on which the weir edge is located.
- the at least one outlet opening can be positioned radially inward or close to the centrifuge axis.
- the fact that the drum cover is weakened in terms of its rigidity is compensated for by means of the at least one third drum cover section arranged radially outwardly according to the invention.
- the at least one third drum cover section is positioned and dimensioned so that the clarified medium can emerge from the at least one outlet opening in the circumferential direction and radially outward at operating speed of the solid bowl screw centrifuge, without impinging on the at least one third drum cover section.
- the operating speed of solid bowl centrifuges is typically between 600 and 10,000 rpm (in words: six hundred and ten thousand revolutions per minute).
- this high operating speed causes the clarified medium from the at least one outlet opening in the circumferential direction the drum lid and is thrown particularly radially outward. Said, further development according to the invention ensures that the clarified medium thus thrown outwards is not prevented from flowing away.
- the at least one third drum cover section viewed in the circumferential direction, is located substantially in a circular sector next to the weir edge.
- a circular sector is a "cake slice" of a circle.
- a plurality of weir edges are arranged in the circumferential direction, then it is advantageous if a plurality of third drum lid sections are located between the circular sectors of the respective weir edges. If the drum cover sections are located in the circumferential direction next to the weir edges, then the corresponding weir plates can be easily mounted and dismounted from the radially outside. In particular, the circular sectors of the third drum cover section or the third drum cover sections and the circular sectors of the weir edge or the weir edges can also partially overlap. The respective third drum cover section can then be made comparatively wide, and thus correspondingly stable or stiff, in particular in the circumferential direction.
- the number of third drum lid portions is equal to the number of outlet openings.
- a plurality of outlet openings are arranged successively and regularly, in the same direction, on the drum cover according to the invention in the circumferential direction Spaced apart.
- a plurality of third drum cover sections are distributed over the circumference and, in particular, also arranged successively and generally regularly spaced at equal intervals.
- a plurality of third drum cover sections may be irregularly spaced or alternately spaced, particularly to achieve noise reduction.
- the number of outlet openings is even or odd between 2 and 10 (in words: two and ten).
- third drum lid sections and outlet openings With the same number of third drum lid sections and outlet openings, it is possible to provide exactly one third drum lid section at each outlet opening. In this way, not only a structurally particularly stiff construction in the form of a lattice structure can be created, but it is also a respective unhindered outflow of cleared medium between the respective third drum lid sections possible.
- the at least one third drum cover section when viewed in the axial direction, has a substantially triangular cross-section.
- Such, in cross-section triangular shape prevents deposition of leaking medium on the respective third drum cover portion.
- a cross-sectionally substantially triangular shape is additionally advantageous in order to avoid flowing, clarified medium on a component of the drum cover .. The clarified medium can then always easily flow radially outward.
- this tip portion of the drum lid portion may extend in the radial direction to near the centrifuge axis.
- Another advantage of this triangular shape of the cross section of the third drum cover portion is that between the respective third drum cover sections radially inside comparatively much space or free space exists to arrange there ever an outlet opening and to mount an associated weir plate.
- the at least one third drum cover section viewed in the axial direction is advantageously designed in cross-section substantially polygonal, in particular hexagonal.
- This cross-sectional polygonal shape of the third drum cover portion results in a small circumference of the third drum cover portion, for this a comparatively large cross-sectional area. It can be transferred with this cross-sectional shape, with the same outer surface, larger forces.
- at least one side face of the third drum cover section is arranged such that it points in the direction of the centrifuge axis, ie substantially radially.
- At least one fourth drum cover section is preferably provided, via which the first drum cover section is also statically connected to the second drum cover section.
- the at least one fourth drum cover section is located radially in relation to the respective weir edge radially inward.
- This fourth drum cover portion is therefore viewed in the radial direction on a circular ring between the weir edge and the centrifuge axis. It thus connects, together with the third drum cover portion, the first with the second drum cover portion.
- the first and the second drum cover section are then connected to one another by means of the third and the fourth drum cover section on an "outer" and an "inner” circular ring.
- the drum cover according to the invention is amplified or stiffened accordingly in this area "grid-like". This stiffening makes it possible to transfer large forces from the first to the second drum cover portion.
- the fourth drum cover portion is formed in cross-section as a ring or as a hollow cylinder and in particular integrally with the first and the second drum cover portion.
- the weir edge is further formed on a weir plate, which, viewed in the axial direction in front of the associated outlet opening on the first drum cover portion is appropriate.
- a weir plate which, viewed in the axial direction in front of the associated outlet opening on the first drum cover portion is appropriate.
- it can seal fluid-tight at the associated outlet opening.
- the clarified medium emerging from the outlet opening is correspondingly retained by the weir plate until the desired pond depth or the defined liquid level has been reached during filling of the drum with medium to be clarified and the clarified medium flows away over the weir edge.
- the weir edge is preferably formed on a channel groove, which is viewed in the axial direction in the direction of flow of the clarified medium after the weir edge attached to the first drum cover portion.
- the channel channel of this kind can deflect the clarified medium emerging through the outlet opening in the circumferential direction counter to the direction of rotation of the drum.
- the effluent of the clarified medium can be used to assist the rotary drive of the bowl of the solid bowl centrifuge. It follows from the so deflected outflow namely an energy recovery from the effluent, clarified medium. If this channel channel is set radially close to the weir edge, comparatively much energy can be recovered from the effluent, clarified medium.
- the weir edge is further formed on an outflow surface which, viewed in the axial direction, extends from the first drum cover section to the second drum cover section.
- the thus aligned discharge surface "connects" the first drum cover portion substantially with the second drum cover portion and thus bridges the distance between the two drum cover sections.
- the outflow surface also serves as a deflection of the outflowing medium in the circumferential direction. In contrast to a channel channel this outflow surface has no channel wall, but uses the second drum cover portion as a radially oriented boundary surface.
- a deflection of the outflowing medium in the circumferential direction without Trough shape possible. This is particularly advantageous with regard to a possible risk of clogging at the outflow surface.
- Fig. 1 shows a solid bowl screw centrifuge 10 according to the prior art with a housing 12 and with a drum 14, in particular by means of a Bearing assembly 16 is rotatably mounted.
- the drum 14 may accordingly rotate at high speed about a centrifuge axis 18 defining an axial direction 20 and a radial direction 22.
- the drum 14 in the axial direction 20 comprises a conical drum end 24, in which, distributed over the circumference, a plurality of ejection openings 26 are located.
- the drum 14 is formed of a circular cylindrical drum body 28 and a plate-shaped drum lid 30.
- the drum cover 30 is divided into three drum cover sections, a first disk-shaped drum cover section 32, a second, hollow cylindrical, thin-walled drum cover section 34 and a third, hollow cylindrical, thick-walled drum cover section 36.
- the first disk-shaped drum cover section 32 is connected to the drum body 28.
- the second, hollow cylindrical, thin-walled drum cover portion 34 is disposed in the bearing assembly 16 and rotatably supported by the bearing assembly 16.
- the third, also hollow cylindrical, but thick-walled drum cover portion 36 is disposed between the first and second drum cover portion 32, 34 and integrally connected at its two axial ends.
- a weir edge 40 is arranged.
- a screw 42 Within the drum 14 rotates, with a comparatively low differential speed, about the centrifuge axis 18, a screw 42.
- the screw 42 has a hollow cylindrical screw hub 44 and a surrounding spiral screw 46.
- the worm 42 is rotatably mounted on the drum cover 30 by means of a bearing arrangement 48.
- a medium 52 to be separated or clarified is to be introduced through the drum cover 30 and the screw hub 44 by means of a feed tube 50.
- the medium to be clarified 52 is exposed by means of the rotation of the drum around the centrifuge axis 18 of a high centrifugal force and separated in this way into several phases. It separates into a first phase or a separated medium 54 and a second phase or a clarified medium 56.
- the deposited medium 54 settles on the inside on the circular cylindrical drum body 28 of the drum 14 and is conveyed by the screw 42 axially to the conical drum end 24 and then along this radially inwardly and through the ejection openings 26 outwardly.
- the generally liquid, clarified medium 56 floats on this deposited medium 54 and collects as a so-called pond to the centrifuge axis 18 out.
- the clarified medium 56 flows over the weir edges 40 and is discharged from the centrifuge axis 18, in particular in the radial direction 22 to the outside.
- Fig. 2 is in detail IV or in Fig. 4 such a weir edge 40 is shown on a disk-shaped, radially aligned weir plate 60. Furthermore, in detail V and in Fig. 5 represents a weir edge 40 on a trough-shaped channel channel 62.
- the Fig. 3 shows the drum cover 30 with its direction of rotation 64 and with six outlet openings 38.
- the outlet openings 38 are circumferentially spaced apart on a ring or circle and extend axially through the drum cover 30 therethrough.
- the fluid level 58 within the drum 14 projects outwards in the axial direction 20 up to the radial height of the weir edges 40.
- the three outlet openings 38 on the left side and top in the Fig. 3 are covered with weir plates 60. Via these weir plates 60, the clarified medium 56 flows in three wide outflow streams 66, which are curved in the direction of rotation.
- three channel channels 62 are arranged with respective weir edges 40. Via these channel channels 62, the clarified medium 56 flows in a circumferentially deflected manner in a comparatively narrow outflow stream 68.
- the channel groove 62 deflects the outflowing medium 56 so in the circumferential direction.
- the three weir plates 60 and the three channel channels 62 are screwed by means of fastening screws 70 with the drum cover 30.
- the third drum lid section 36 according to the prior art is to be seen as a thick-walled, hatched ring.
- Fig. 4 shows one of the weir plates 60 as a flat, thin plate, which covers the outlet opening 38 in the circumferential direction completely and further in the radial direction 22 partially outwardly with its width extension.
- the weir plate 60 thus defines with its weir edge 40 the liquid level 58 of the clarified medium 56 within the drum 14.
- Fig. 5 shows one of the channel grooves 62 with its four regions 72, 74, 76 and 78 and an outflow surface 80.
- the second region 74 has axially directed outwards and acts as a gutter floor.
- This second region 74 forms an outflow surface 80 and extends substantially in the circumferential direction.
- the third area 76 points outward from the second area 74 in the radial direction 22 towards the centrifuge axis 18.
- the fourth region 78 closes the channel channel 62 of this kind to the direction of rotation 64.
- the Fig. 6 shows a part of the solid bowl centrifuge 10 according to a first embodiment with the drum cover 30.
- the drum cover 30 is as in Fig. 1 in the first drum lid section 32, the second drum lid section 34, a third drum lid section 82 according to the invention and additionally subdivided a fourth drum cover portion 84 according to the invention.
- outlet openings 38 are formed, which extend obliquely inwardly toward the centrifuge axis 18 and in particular are designed to expand outwardly.
- the third and fourth drum lid portions 82, 84 are disposed between the first and second drum lid portions 32, 34.
- the third drum lid portion 82 extends adjacent to the first drum lid portion 32, within a first portion 86 annular in cross-section, and proximate the second drum lid portion 34, within a disk-shaped second portion 88.
- the first region 86 connects to the first drum cover portion 32 and is located radially outwardly of the associated weir edges 40.
- the first region 86 is interrupted by a plurality of outflow openings 90 from which the clarified medium 56, through the drum cover 30, pass radially outward can.
- the second region 88 is plate-shaped and arranged axially adjacent to the weir edges 40 and relative to the radial direction 22 on the outside and in the inside thereof. It connects the first region 86 to the second drum cover section 34.
- mounting bores 92 are provided axially next to the fastening screws 70, through which these fastening screws 70 can be mounted in the axial direction 20.
- the second region 88 can also be designed in a non-plate-like manner, but by means of spokes or struts, in a star-shaped or grid-shaped manner in order to connect the first region 86 to the second drum cover section 34.
- the fourth, relatively thin-walled, tubular drum cover portion 84 radially connects, from the outlet openings 38, the first drum lid portion 32 to the second portion 88 in the radial direction 22.
- the fourth drum lid portion 48 may alternatively be polygonal.
- the fourth drum cover portion 84 thus stiffened the drum cover 30 radially quite far inside out. It also serves to ensure that effluent, clarified medium 56 can not reach inward in the radial direction 22.
- outlet openings 38 are provided. At three of these outlet openings 38, located in Fig. 7 On the left side and at the top, weir plates 60 with associated outflow streams 66 are shown. At the three remaining outlet openings 38, they are in Fig. 7 Located on the right and bottom, channel grooves 62 are shown with the respective outflow streams 68.
- the annular shape of the first region 86 is divided in the circumferential direction of the outflow openings 90 into a plurality of elements 94.
- these elements 94 each have a substantially triangular shape, which has a corner pointing to the centrifuge axis 18. This corner is rounded, while the other two corners of the triangle shape are sharp-edged.
- the rounding of the radially inwardly facing corner has the advantage that the clarified medium 56 can flow out as possible without turbulence radially outward.
- the elements 94 of the first region 86 lie in each case in a circular sector in the circumferential direction substantially adjacent to an adjacent weir edge 40.
- the number of elements 94 is equal to the number of weir edges 40 and to outlet openings 38.
- the clarified medium 56 flows through the outlet opening 38 via the associated weir edge 40.
- the clarified medium 56 flows directly radially outward through the local outflow opening 90 between two adjacent elements 94.
- the clarified medium 56 flows, due to the deflection in the direction of rotation, through an outflow opening 90 adjacent in the circumferential direction. The clarified medium 56 thus "skips" one of the elements 94.
- the 8 and 9 show a part of a solid bowl screw centrifuge 10 according to a second embodiment of the invention.
- the drum cover 30 is divided into a first and second drum lid section 32 and 34 and a third drum cover section 82 according to the invention.
- a fourth drum cover portion 84 does not exist in this embodiment.
- the outlet opening 38 with its weir edge 40 set even closer to the centrifuge axis 18. This makes it possible for the liquid level 58 in the drum 14 to move closer to the centrifuge axis 18 or for the puddle depth to be greater than in the first exemplary embodiment according to FIG Fig. 6 ,
- the third drum cover portion 82 of this embodiment also includes an annular, discontinuous portion 86 on the first drum cover portion 32 and a disk-shaped portion 88 on the second drum cover portion 34.
- the portion 86 is located closer to the centrifuge axis 18 in the radial direction 22.
- the disk of area 88 is correspondingly smaller in diameter.
- Fig. 9 As in Fig. 9 can be seen, are here six outlet 38 with three weir plates 60 with discharge streams 66 top left, and three channel channels 62 with Outflow streams 68 shown at the bottom right.
- the weir plates 60 and the channel grooves 62 are screwed by means of fastening screws 70 in the radial direction 22 outside of the outlet openings 38.
- the first region 86 is subdivided into a plurality of elements 94, which are arranged in the circumferential direction on a concentric ring about the centrifuge axis 18.
- the elements 94 lie substantially on circular sectors adjacent to a respectively adjacent weir edge 40 and the number of elements 94 is equal to the number of outlet openings 38.
- the elements 94 according to Fig. 9 each have a hexagonal shape in cross section. Two of the side surfaces of this hexagonal shape point in the direction of the centrifuge axis 18.
- the hexagonal shape has, as in section Fig. 9 can be clearly seen, a larger cross-sectional area, than in Fig. 7 illustrated, triangular shape.
- the first region 86 is further radially inwardly in this embodiment.
- Fig. 10 shows a channel groove 62 for the drum cover portion 82 according to the invention.
- this channel groove 62 has only three areas 72, 74 and 78.
- the third region 76 is here replaced by the outlet wall 38 facing the inner wall of the second portion 88 of the third drum cover portion 82.
- the first three sections 72, 74 and 78 are substantially the same as in the embodiment of FIG Fig. 5 ,
- the difference with this channel groove 62 is in that the second and fourth regions 74, 78 extend with the downstream surface 80 in the axial direction 20 away from the outlet opening 38 to the second region 88 of the third drum lid portion 82.
- the second area 88 thus assumes the function of deflecting the emerging, clarified medium in the circumferential direction.
- Fig. 11 In contrast, in contrast, shows the installation situation with a conventional or conventional weir plate 60 in the drum cover 30 according to the invention.
- the element 94 has a cross-sectionally substantially pentagonal shape.
- the element 94 is adapted to the direction of rotation 64 and is designed to be dependent on the direction of rotation.
- the design of element 94 is oriented to the outer edges of the effluents of effluent stream 66 and effluent stream 68, respectively, facing element 94.
- Element 94 is just filling that space where effluent streams 66 and 69 can not be located. It follows that both outflow streams 66 and 68 are to be derived particularly free of resistance and turbulence. To illustrate this, are in Fig. 12 also both outflow streams 66 and 68 are shown at a single outlet opening 38.
- the rotational direction-dependent, pentagonal shape, as in the section according to Fig. 12 has a larger cross-sectional area than that in Fig. 7 illustrated, triangular shape and the in Fig. 9 illustrated, hexagonal shape. Due to this larger cross-sectional area higher forces can be transmitted, as in the embodiments according to Fig. 6 to 9 , Especially with a torsional stress this is substantially pentagonal shape of the elements 94 according to Fig. 12 and their arrangement particularly advantageous.
- Fig. 13 shows a further embodiment of the element 94 according to Fig. 12 ,
- the corners of the cross-section substantially pentagonal shape, which point to the centrifuge axis 18, designed rounded.
- the rounding of the corners of the element 94 allows the element 94 to be adapted even closer to the arc shape of the drainage streams 64 and 68.
- the cross-sectional area of the element 94 according to Fig. 13 becomes as compared to the element 94 according to Fig. 12 further enlarged.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Ein Trommeldeckel (30) einer um eine Zentrifugenachse (18) rotierbaren Trommel einer Vollmantelschneckenzentrifuge ist mit einem ersten Trommeldeckelabschnitt (32), in dem sich mindestens eine Auslassöffnung befindet, an der ein geklärtes Medium von innerhalb der Trommel über eine Wehrkante (40) nach außerhalb der Trommel strömen kann, sowie einem zweiten Trommeldeckelabschnitt (34), der sich in Axialrichtung betrachtet außen von dem ersten Trommeldeckelabschnitt befindet und der die Trommel drehbar abstützend gestaltet ist, und mindestens einem dritten Trommeldeckelabschnitt (82) gestaltet, über den der erste Trommeldeckelabschnitt (32) mit dem zweiten Trommeldeckelabschnitt (34) statisch verbunden ist. Gemäß der Erfindung befindet sich der mindestens eine dritte Trommeldeckelabschnitt (82) in Radialrichtung betrachtet in Bezug auf die Wehrkante (40) radial außen.A drum cover (30) of a drum of a solid bowl screw centrifuge rotatable about a centrifuge axis (18) is provided with a first drum cover portion (32) having at least one outlet opening at which a clarified medium from within the drum is directed outwardly beyond a weir edge (40) and a second drum lid portion (34) axially outwardly of the first drum lid portion and rotatably supporting the drum, and at least one third drum lid portion (82) over which the first drum lid portion (32 ) is statically connected to the second drum cover portion (34). According to the invention, the at least one third drum cover portion (82) is located radially outward with respect to the weir edge (40) as viewed in the radial direction.
Description
Die Erfindung betrifft einen Trommeldeckel einer um eine Zentrifugenachse rotierbaren Trommel einer Vollmantelschneckenzentrifuge, mit einem ersten Trommeldeckelabschnitt, in dem sich mindestens eine Auslassöffnung befindet, an der ein geklärtes Medium von innerhalb der Trommel über eine Wehrkante nach außerhalb der Trommel strömen kann, sowie einem zweiten Trommeldeckelabschnitt, der sich in Axialrichtung betrachtet außen von dem ersten Trommeldeckelabschnitt befindet und der die Trommel drehbar abstützend gestaltet ist, und mindestens einem dritten Trommeldeckelabschnitt, über den der erste Trommeldeckelabschnitt mit dem zweiten Trommeldeckelabschnitt statisch verbunden ist.The invention relates to a drum lid of a rotatable about a centrifuge axis drum of a solid bowl screw centrifuge, with a first drum cover portion in which there is at least one outlet opening at which a clarified medium from within the drum via a weir edge can flow outside the drum, and a second drum cover portion which is axially outwardly of the first drum lid portion and which rotatably supports the drum, and at least one third drum lid portion via which the first drum lid portion is statically connected to the second drum lid portion.
Vollmantelschneckenzentrifugen, auch als Dekanter bekannt, separieren mit einer Trommel, die mit hoher Drehzahl um eine Zentrifugenachse rotiert, kontinuierlich fließfähige Stoffgemische. Das Stoffgemisch wird innerhalb der Trommel in mindestens zwei Phasen getrennt, wobei als sogenannter Teich eine leichte Phase, meist ein geklärtes Medium, auf einer schweren Phase, wie etwa Partikel oder Schlamm, aufschwimmt.Solid bowl centrifuges, also known as decanters, separate with a drum rotating at high speed about a centrifuge axis, continuously flowable mixtures. The mixture of substances is separated within the drum in at least two phases, wherein a so-called pond, a light phase, usually a clarified medium, floating on a heavy phase, such as particles or sludge.
Die Trommel ist an einem ihrer beiden axialen Enden mit einem Trommeldeckel verschlossen. Der Trommeldeckel weist mehrere Abschnitte auf, die in der Regel einstückig gestaltet oder miteinander verschraubt oder verschweißt sind und in einander übergehen. In einem ersten Trommeldeckelabschnitt befindet sich mindestens eine Auslassöffnung, an der das geklärte Medium von innerhalb der Trommel über eine Wehrkante nach außerhalb der Trommel strömen kann. Dieser erste Trommeldeckelabschnitt ist in der Regel als eine Scheibe gestaltet, die sich plattenförmig von radial innen nach radial außen erstreckt. Ein zweiter Trommeldeckelabschnitt befindet sich, bezogen auf den Innenraum der Trommel, in Axialrichtung betrachtet außen vor dem ersten Trommeldeckelabschnitt und stützt dort die Trommel drehbar ab. An oder in diesem zweiten Trommeldeckelabschnitt befindet sich in der Regel ein Trommellager. Ferner gibt es mindestens einen dritten Trommeldeckelabschnitt, über den der erste Trommeldeckelabschnitt mit dem zweiten Trommeldeckelabschnitt statisch verbunden ist. Dieser dritte Trommeldeckelabschnitt ist in der Regel als eine Verdickung bzw. ein dickwandiger Hohlzylinder gestaltet, durch dessen Inneres bzw. Innenraum sich ein Zulaufrohr für das zu klärende Stoffgemisch oder eine Antriebswelle einer Schnecke erstreckt.The drum is closed at one of its two axial ends with a drum lid. The drum lid has several sections, which are usually designed in one piece or screwed or welded together and in pass each other. In a first drum cover section there is at least one outlet opening, at which the clarified medium can flow from within the drum via a weir edge to the outside of the drum. This first drum cover portion is usually designed as a disc extending plate-shaped from radially inward to radially outward. A second drum cover portion is located, relative to the interior of the drum, viewed in the axial direction, outside the first drum cover portion and rotatably supports the drum therefrom. On or in this second drum lid section is usually a drum bearing. Further, there is at least a third drum lid portion, via which the first drum lid portion is statically connected to the second drum lid portion. This third drum cover section is usually designed as a thickening or a thick-walled hollow cylinder through the interior or interior of which extends an inlet pipe for the substance mixture to be clarified or a drive shaft of a worm.
Die Auslassöffnung ist normalerweise außen an der Trommel mit einer Wehrplatte versehen, die zur Auslassöffnung hin eine Wehrkante aufweist. Diese Wehrkante an der Auslassöffnung bestimmt bzw. reguliert den Höhenstand bzw. die Teichtiefe der leichten Phase innerhalb der Trommel.The outlet opening is normally provided on the outside of the drum with a weir plate having a weir edge towards the outlet opening. This weir edge at the outlet port determines or regulates the ridge level or the puddle depth of the light phase within the drum.
Der Erfindung liegt die Aufgabe zugrunde, einen Trommeldeckel einer Vollmantelschneckenzentrifuge zu schaffen, bei dem es möglich ist, die mindestens eine Auslassöffnung radial weit nach innen zu setzen und so im Inneren der Trommel eine große Teichtiefe bereitzustellen.The invention has for its object to provide a drum lid of a solid bowl screw centrifuge, in which it is possible to set the at least one outlet radially inward to provide a large pond depth inside the drum.
Diese Aufgabe ist erfindungsgemäß mit einem Trommeldeckel einer um eine Zentrifugenachse rotierbaren Trommel einer Vollmantelschneckenzentrifuge geschaffen, mit einem ersten Trommeldeckelabschnitt, in dem sich mindestens eine Auslassöffnung befindet, an der ein geklärtes Medium von innerhalb der Trommel über eine Wehrkante nach außerhalb der Trommel strömen kann, und mit einem zweiten Trommeldeckelabschnitt, der sich in Axialrichtung betrachtet außen von bzw. vor dem ersten Trommeldeckelabschnitt befindet und der die Trommel drehbar abstützend gestaltet ist, sowie mit mindestens einem dritten Trommeldeckelabschnitt, über den der erste Trommeldeckelabschnitt mit dem zweiten Trommeldeckelabschnitt statisch verbunden ist, wobei der mindestens eine dritte Trommeldeckelabschnitt sich in Radialrichtung betrachtet in Bezug auf die Wehrkante radial außen befindet.This object is achieved according to the invention with a drum lid of a drum of a solid bowl screw centrifuge rotatable about a centrifuge axis, with a first drum cover portion in which there is at least one outlet opening at which a clarified medium can flow from within the drum via a weir edge to the outside of the drum, and with a second drum cover portion, viewed in the axial direction outside of or in front of the first Drum cover portion and the drum is designed to be rotatably supporting, and at least a third drum cover portion, via which the first drum cover portion with the second drum cover portion is statically connected, wherein the at least one third drum cover portion is radially outwardly with respect to the weir edge.
Bei herkömmlichen Trommeldeckeln befindet sich der mindestens eine dritte Trommeldeckelabschnitt in Radialrichtung betrachtet in Bezug auf die mindestens eine dortige Wehrkante radial innen. Die Wehrkante bzw. Wehrkanten befindet bzw. befinden sich also radial außen von diesem dritten Trommeldeckelabschnitt. An der jeweiligen Wehrkante austretendes, geklärtes Medium kann entsprechend frei nach radial außen abgeführt werden. Dieses freie Abführen ist grundsätzlich notwendig, weil ja die Trommel mit hoher Drehzahl rotiert und entsprechend das austretende Medium einer hohen Zentrifugalkraft unterliegt und demnach am Austritt bezogen auf den rotierenden Trommeldeckel sofort nach radial außen geschleudert wird.In the case of conventional drum lids, the at least one third drum lid section, viewed in the radial direction, is located radially inward with respect to the at least one weir edge there. The weir edge or weir edges is or are located so radially outside of this third drum cover portion. At the respective weir edge exiting, clarified medium can be correspondingly freely discharged radially outward. This free removal is basically necessary, because yes rotates the drum at high speed and accordingly the exiting medium is subject to high centrifugal force and therefore at the outlet based on the rotating drum cover immediately thrown radially outward.
An dem erfindungsgemäßen Trommeldeckel befindet sich hingegen in Radialrichtung betrachtet radial außen von der Wehrkante der mindestens eine dritte Trommeldeckelabschnitt. Dies überrascht zunächst, weil der dortige Trommeldeckelabschnitt doch eigentlich das Abströmen von geklärtem Medium behindern würde. Die Erfindung macht sich diesbezüglich jedoch den Umstand zunutze, dass der mindestens eine dritte Trommeldeckelabschnitt sich ja nicht zwingend über den gesamten Umfang des Trommeldeckels erstrecken muss, sondern dass dort radial außen von den Wehrkanten trotz drittem Trommeldeckelabschnitt auch Freiräume bestehen bleiben können, durch die hindurch das geklärte Medium dann nach radial außen abströmen kann. So schafft es die erfindungsgemäße Lösung mit deren mindestens einem dritten Trommeldeckelabschnitt, eine stützende Wirkung zwischen dem ersten und dem zweiten Trommeldeckelabschnitt zu schaffen, ohne dass dafür radial innen von der Wehrkante bzw. den Wehrkanten Raum benötigt wird. Die hier verwendete Bezeichnung "in Radialrichtung betrachtet radial außen" bedeutet dabei nicht, dass der dritte Trommeldeckelabschnitt auf ein und demselben Radius bzw. Radialstrahl außen von der Wehrkante liegt, sondern nur, dass er sich auf einem Kreisring befindet, der radial weiter außen liegt, also einen größeren Radius hat, als ein Kreisring radial weiter innen, auf dem sich die Wehrkante befindet.On the drum lid according to the invention, however, viewed in the radial direction is radially outside of the weir edge of the at least one third drum cover portion. This surprises initially, because the local drum lid section would actually hinder the outflow of clarified medium. However, the invention makes use in this regard of the fact that the at least one third drum cover section does not necessarily have to extend over the entire circumference of the drum cover, but that there may remain free space outside the weir edges despite the third drum cover section radially outward through which the clarified medium then radially can flow outside. Thus, the solution according to the invention, with its at least one third drum cover section, creates a supporting effect between the first and the second drum cover section, without requiring space radially inward from the weir edge or the weir edges. The term "radially outward viewed radially" does not mean that the third drum cover section lies on one and the same radius or radial beam on the outside of the weir edge, but only that it is located on a circular ring which lies radially further outward. so has a larger radius than a circular ring radially further inside, on which the weir edge is located.
Die mindestens eine Auslassöffnung kann erfindungsgemäß entsprechend radial weit innen bzw. nahe an der Zentrifugenachse positioniert werden. Dass dabei dort der Trommeldeckel hinsichtlich seiner Steifigkeit geschwächt wird, wird mittels des mindestens einen, erfindungsgemäß radial außen angeordneten, dritten Trommeldeckelabschnitts kompensiert.According to the invention, the at least one outlet opening can be positioned radially inward or close to the centrifuge axis. The fact that the drum cover is weakened in terms of its rigidity is compensated for by means of the at least one third drum cover section arranged radially outwardly according to the invention.
So kann an der erfindungsgemäßen Vollmantelschneckenzentrifuge insbesondere eine vergleichsweise große Teichtiefe realisiert werden, ohne dass es zu einer übermäßigen Schwächung am Trommeldeckel, aufgrund von radial weit innen positionierten Auslassöffnungen, kommen würde.Thus, in particular, a comparatively large pond depth can be realized on the solid bowl screw centrifuge according to the invention, without there being excessive weakening on the drum cover due to outlet openings positioned radially far inward.
Vorteilhaft ist bei dem erfindungsgemäßen Trommeldeckel der mindestens eine dritte Trommeldeckelabschnitt derart positioniert und dimensioniert, dass bei Betriebsdrehzahl der Vollmantelschneckenzentrifuge das geklärte Medium aus der mindestens einen Auslassöffnung in Umfangsrichtung und nach radial außen austreten kann, ohne dabei auf den mindestens einen dritten Trommeldeckelabschnitt aufzutreffen. Die Betriebsdrehzahl bei Vollmantelschneckenzentrifugen beträgt in der Regel zwischen 600 und 10000 U/min (in Worten: sechshundert und zehntausend Umdrehungen pro Minute). Wie erwähnt bewirkt diese hohe Betriebsdrehzahl, dass das geklärte Medium aus der mindestens einen Auslassöffnung in Umfangsrichtung des Trommeldeckels und besonders radial nach außen geschleudert wird. Die genannte, erfindungsgemäße Weiterbildung stellt sicher, dass das derart nach außen geschleuderte, geklärte Medium nicht am Abströmen gehindert wird.Advantageously, in the case of the drum cover according to the invention, the at least one third drum cover section is positioned and dimensioned so that the clarified medium can emerge from the at least one outlet opening in the circumferential direction and radially outward at operating speed of the solid bowl screw centrifuge, without impinging on the at least one third drum cover section. The operating speed of solid bowl centrifuges is typically between 600 and 10,000 rpm (in words: six hundred and ten thousand revolutions per minute). As mentioned, this high operating speed causes the clarified medium from the at least one outlet opening in the circumferential direction the drum lid and is thrown particularly radially outward. Said, further development according to the invention ensures that the clarified medium thus thrown outwards is not prevented from flowing away.
In vorteilhafter Weise befindet sich ferner der mindestens eine dritte Trommeldeckelabschnitt in Umfangsrichtung betrachtet im Wesentlichen in einem Kreissektor neben der Wehrkante. Ein Kreissektor ist ein "Tortenstück" eines Kreises. Indem derart vorteilhaft der dritte Trommeldeckelabschnitt, zumindest im Wesentlichen, in einem Kreissektor angeordnet ist, der sich neben einer zugehörigen bzw. benachbarten Wehrkante befindet, ist es insbesondere möglich, dass das geklärte Medium aus der zugehörigen Auslassöffnung beim Wegschleudern in radialer Richtung ungehindert abströmen kann. Dieses unmittelbare, ungehinderte Abströmen in radialer Richtung ist dahingehend vorteilhaft, dass das geklärtes Medium nicht auf ein rotierendes Bauteil trifft und dieses bremst, was einen erhöhten Energiebedarf der Vollmantelschneckenzentrifuge bewirken würde. Wenn in Umfangsrichtung mehrere Wehrkanten angeordnet sind, dann ist es vorteilhaft, wenn mehrere dritte Trommeldeckelabschnitte sich zwischen den Kreissektoren der jeweiligen Wehrkanten befinden. Wenn sich die Trommeldeckelabschnitte in Umfangsrichtung neben den Wehrkanten befinden, so können dort die zugehörigen Wehrplatten von radial außen her einfach montiert und demontiert werden. Insbesondere können sich die Kreissektoren des dritten Trommeldeckelabschnitts bzw. der dritten Trommeldeckelabschnitte und die Kreissektoren der Wehrkante bzw. der Wehrkanten auch teilweise überschneiden. Der jeweilige dritte Trommeldeckelabschnitt kann dann insbesondere in Umfangsrichtung vergleichsweise breit und damit entsprechend stabil bzw. steif gestaltet sein.In an advantageous manner, furthermore, the at least one third drum cover section, viewed in the circumferential direction, is located substantially in a circular sector next to the weir edge. A circular sector is a "cake slice" of a circle. By advantageously such that the third drum cover section is arranged, at least substantially, in a circular sector which is adjacent to an associated or adjacent weir edge, it is possible, in particular, for the clarified medium to be able to flow out of the associated outlet opening in the radial direction without hindrance. This direct, unimpeded outflow in the radial direction is advantageous in that the clarified medium does not strike a rotating component and brakes it, which would cause an increased energy requirement of the solid bowl screw centrifuge. If a plurality of weir edges are arranged in the circumferential direction, then it is advantageous if a plurality of third drum lid sections are located between the circular sectors of the respective weir edges. If the drum cover sections are located in the circumferential direction next to the weir edges, then the corresponding weir plates can be easily mounted and dismounted from the radially outside. In particular, the circular sectors of the third drum cover section or the third drum cover sections and the circular sectors of the weir edge or the weir edges can also partially overlap. The respective third drum cover section can then be made comparatively wide, and thus correspondingly stable or stiff, in particular in the circumferential direction.
Ferner ist bei dem erfindungsgemäßen Trommeldeckel vorzugsweise die Anzahl an dritten Trommeldeckelabschnitten gleich der Anzahl an Auslassöffnungen. In der Regel befinden sich am erfindungsgemäßen Trommeldeckel in Umfangsrichtung mehrere Auslassöffnungen aufeinanderfolgend und regelmäßig, in gleichen Abständen beabstandet. Ebenso ist es statisch von Vorteil, wenn mehrere dritte Trommeldeckelabschnitte über den Umfang verteilt und insbesondere ebenfalls aufeinander folgend und in der Regel regelmäßig, in gleichen Abständen beabstandet angeordnet sind. Alternativ dazu können mehrere dritte Trommeldeckelabschnitte unregelmäßig beabstandet oder alternierend beabstandet sein, insbesondere um eine Geräuschminderung zu erzielen. Besonders bevorzugt ist die Anzahl der Auslassöffnungen gerade oder ungerade zwischen 2 und 10 (in Worten: zwei und zehn). Bei gleicher Anzahl von dritten Trommeldeckelabschnitten und Auslassöffnungen ist es möglich, an jeder Auslausöffnung genau einen dritten Trommeldeckelabschnitt vorzusehen. Auf diese Weise kann nicht nur eine statisch besonders steife Konstruktion in Gestalt einer Gitterstruktur geschaffen werden, sondern es ist auch ein jeweils ungehindertes Abströmen von geklärtem Medium zwischen den jeweiligen dritten Trommeldeckelabschnitten möglich.Further, in the drum lid of the present invention, preferably, the number of third drum lid portions is equal to the number of outlet openings. As a rule, a plurality of outlet openings are arranged successively and regularly, in the same direction, on the drum cover according to the invention in the circumferential direction Spaced apart. Likewise, it is statically advantageous if a plurality of third drum cover sections are distributed over the circumference and, in particular, also arranged successively and generally regularly spaced at equal intervals. Alternatively, a plurality of third drum cover sections may be irregularly spaced or alternately spaced, particularly to achieve noise reduction. Particularly preferably, the number of outlet openings is even or odd between 2 and 10 (in words: two and ten). With the same number of third drum lid sections and outlet openings, it is possible to provide exactly one third drum lid section at each outlet opening. In this way, not only a structurally particularly stiff construction in the form of a lattice structure can be created, but it is also a respective unhindered outflow of cleared medium between the respective third drum lid sections possible.
Besonders bevorzugt ist der mindestens eine dritte Trommeldeckelabschnitt in Axialrichtung betrachtet im Querschnitt im Wesentlichen dreieckig gestaltet. Die derartige, im Querschnitt dreieckige Form verhindert ein Ablagern von austretendem Medium am jeweiligen dritten Trommeldeckelabschnitt. Eine im Querschnitt im Wesentlichen dreieckige Form ist zusätzlich von Vorteil, um zu vermeiden, dass abströmendes, geklärtes Medium auf ein Bauteil des Trommeldeckels trifft.. Das geklärte Medium kann dann immer leicht nach radial außen abströmen. Wenn ferner eine Spitze des im Querschnitt dreieckigen dritten Trommeldeckelabschnitts in Richtung der Zentrifugenachse zeigt, kann dieser spitze Bereich des Trommeldeckelabschnitts in radialer Richtung bis nahe an die Zentrifugenachse reichen. So können mit den dritten Trommeldeckelabschnitten vergleichsweise große Kräfte abgestützt werden. Ein weiterer Vorteil dieser Dreiecksform des Querschnitts des dritten Trommeldeckelabschnitts ist, dass zwischen den jeweiligen dritten Trommeldeckelabschnitten radial innen vergleichsweise viel Platz bzw. Freiraum besteht, um dort je eine Auslassöffnung anzuordnen und eine zugehörige Wehrplatte zu montieren.Particularly preferably, the at least one third drum cover section, when viewed in the axial direction, has a substantially triangular cross-section. Such, in cross-section triangular shape prevents deposition of leaking medium on the respective third drum cover portion. A cross-sectionally substantially triangular shape is additionally advantageous in order to avoid flowing, clarified medium on a component of the drum cover .. The clarified medium can then always easily flow radially outward. Further, when a tip of the triangular third drum lid portion in the direction of the centrifuge axis faces, this tip portion of the drum lid portion may extend in the radial direction to near the centrifuge axis. Thus, comparatively large forces can be supported with the third drum lid sections. Another advantage of this triangular shape of the cross section of the third drum cover portion is that between the respective third drum cover sections radially inside comparatively much space or free space exists to arrange there ever an outlet opening and to mount an associated weir plate.
Alternativ ist in vorteilhafter Weise der mindestens eine dritte Trommeldeckelabschnitt in Axialrichtung betrachtet im Querschnitt im Wesentlichen vieleckig insbesondere sechseckig gestaltet. Diese im Querschnitt vieleckige Form des dritten Trommeldeckelabschnitts ergibt, bei kleinem Umfang des dritten Trommeldeckelabschnitts, für diesen eine vergleichsweise große Querschnittsfläche. Es können mit dieser Querschnittsform, bei gleicher Außenfläche, größere Kräfte übertragen werden. Um beim Starten oder Stoppen der zugehörigen Zentrifuge eine günstige Ableitung des geklärten Mediums zu erreichen, ist dabei vorzugsweise zumindest eine Seitenfläche des dritten Trommeldeckelabschnitts so angeordnet, dass sie in Richtung der Zentrifugenachse, also weitgehend radial, weist.Alternatively, the at least one third drum cover section viewed in the axial direction is advantageously designed in cross-section substantially polygonal, in particular hexagonal. This cross-sectional polygonal shape of the third drum cover portion results in a small circumference of the third drum cover portion, for this a comparatively large cross-sectional area. It can be transferred with this cross-sectional shape, with the same outer surface, larger forces. In order to achieve a favorable discharge of the clarified medium when starting or stopping the associated centrifuge, preferably at least one side face of the third drum cover section is arranged such that it points in the direction of the centrifuge axis, ie substantially radially.
Ferner ist bei dem erfindungsgemäßen Trommeldeckel vorzugsweise mindestens ein vierter Trommeldeckelabschnitt vorgesehen, über den ebenfalls der erste Trommeldeckelabschnitt mit dem zweiten Trommeldeckelabschnitt statisch verbunden ist. Dabei befindet sich der mindestens eine vierte Trommeldeckelabschnitt in Radialrichtung betrachtet in Bezug auf die jeweilige Wehrkante radial innen. Dieser vierte Trommeldeckelabschnitt befindet sich demnach in radialer Richtung betrachtet auf einem Kreisring zwischen der Wehrkante und der Zentrifugenachse. Er verbindet so, gemeinsam mit dem dritten Trommeldeckelabschnitt, den ersten mit dem zweiten Trommeldeckelabschnitt. Der erste und der zweite Trommeldeckelabschnitt sind dann also mittels des dritten und des vierten Trommeldeckelabschnitts auf einem "äußeren" und einem "inneren" Kreisring miteinander verbunden. Der erfindungsgemäße Trommeldeckel ist entsprechend in diesem Bereich "gitterartig" verstärkt bzw. ausgesteift. Diese Aussteifung ermöglicht es, große Kräfte von dem ersten zu dem zweiten Trommeldeckelabschnitt zu übertragen. Besonders bevorzugt ist der vierte Trommeldeckelabschnitt im Querschnitt als ein Ring bzw. als ein Hohlzylinder und insbesondere einstückig mit dem ersten und dem zweiten Trommeldeckelabschnitt ausgebildet.Furthermore, in the case of the drum cover according to the invention, at least one fourth drum cover section is preferably provided, via which the first drum cover section is also statically connected to the second drum cover section. In this case, the at least one fourth drum cover section is located radially in relation to the respective weir edge radially inward. This fourth drum cover portion is therefore viewed in the radial direction on a circular ring between the weir edge and the centrifuge axis. It thus connects, together with the third drum cover portion, the first with the second drum cover portion. The first and the second drum cover section are then connected to one another by means of the third and the fourth drum cover section on an "outer" and an "inner" circular ring. The drum cover according to the invention is amplified or stiffened accordingly in this area "grid-like". This stiffening makes it possible to transfer large forces from the first to the second drum cover portion. Particularly preferably, the fourth drum cover portion is formed in cross-section as a ring or as a hollow cylinder and in particular integrally with the first and the second drum cover portion.
Bevorzugt ist ferner die Wehrkante an einer Wehrplatte ausgebildet, die in Axialrichtung betrachtet vor der zugehörigen Auslassöffnung an dem ersten Trommeldeckelabschnitt angebracht ist. Beim Anbringen der Wehrplatte an dem ersten Trommeldeckelabschnitt kann diese an der zugehörigen Auslassöffnung fluiddicht abdichten. Das aus der Auslassöffnung austretende geklärte Medium wird entsprechend von der Wehrplatte zurückgehalten, bis beim Befüllen der Trommel mit zu klärenden Medium die gewünschte Teichtiefe bzw. der festgelegte Flüssigkeitsstand erreicht ist und das geklärte Medium über die Wehrkante hinweg abfl ießt.Preferably, the weir edge is further formed on a weir plate, which, viewed in the axial direction in front of the associated outlet opening on the first drum cover portion is appropriate. When attaching the weir plate to the first drum cover portion, it can seal fluid-tight at the associated outlet opening. The clarified medium emerging from the outlet opening is correspondingly retained by the weir plate until the desired pond depth or the defined liquid level has been reached during filling of the drum with medium to be clarified and the clarified medium flows away over the weir edge.
Alternativ ist die Wehrkante vorzugsweise an einer Kanalrinne ausgebildet, die in Axialrichtung betrachtet in Durchströmungsrichtung des geklärten Mediums nach der Wehrkante an dem ersten Trommeldeckelabschnitt angebracht ist. Die derartige Kanalrinne kann das durch die Auslassöffnung austretende geklärte Medium in Umfangsrichtung hin entgegen der Rotationsrichtung der Trommel ablenken. Auf diese Weise kann das Abströmen des geklärten Mediums genutzt werden, um den Drehantrieb der Trommel der Vollmantelschneckenzentrifuge zu unterstützten. Es ergibt sich aus dem derart umgelenkten Abströmen nämlich eine Energierückgewinnung aus dem abfließenden, geklärten Medium. Wenn diese Kanalrinne radial nahe an die Wehrkante herangesetzt ist, kann vergleichsweise viel Energie aus dem abströmenden, geklärten Medium zurückgewonnen werden.Alternatively, the weir edge is preferably formed on a channel groove, which is viewed in the axial direction in the direction of flow of the clarified medium after the weir edge attached to the first drum cover portion. The channel channel of this kind can deflect the clarified medium emerging through the outlet opening in the circumferential direction counter to the direction of rotation of the drum. In this way, the effluent of the clarified medium can be used to assist the rotary drive of the bowl of the solid bowl centrifuge. It follows from the so deflected outflow namely an energy recovery from the effluent, clarified medium. If this channel channel is set radially close to the weir edge, comparatively much energy can be recovered from the effluent, clarified medium.
In vorteilhafter Weise ist ferner die Wehrkante an einer Abströmfläche ausgebildet, die in Axialrichtung betrachtet sich von dem ersten Trommeldeckelabschnitt zu dem zweiten Trommeldeckelabschnitt erstreckt. Die derart ausgerichtete Abströmfläche "verbindet" den ersten Trommeldeckelabschnitt weitgehend mit dem zweiten Trommeldeckelabschnitt und überbrückt so den Abstand zwischen den beiden Trommeldeckelabschnitten. Die Abströmfläche dient dabei ebenfalls als eine Umlenkung des abströmenden Mediums in Umfangsrichtung. Im Gegensatz zu einer Kanalrinne weist diese Abströmfläche dabei keine Kanalwand auf, sondern nutzt den zweiten Trommeldeckelabschnitt als radial ausgerichtete Begrenzungsfläche. So ist eine Umlenkung des abströmenden Mediums in Umfangsrichtung auch ohne Rinnenform möglich. Dies ist insbesondere im Hinblick auf eine mögliche Verstopfungsgefahr an der Abströmfläche von Vorteil.Advantageously, the weir edge is further formed on an outflow surface which, viewed in the axial direction, extends from the first drum cover section to the second drum cover section. The thus aligned discharge surface "connects" the first drum cover portion substantially with the second drum cover portion and thus bridges the distance between the two drum cover sections. The outflow surface also serves as a deflection of the outflowing medium in the circumferential direction. In contrast to a channel channel this outflow surface has no channel wall, but uses the second drum cover portion as a radially oriented boundary surface. Thus, a deflection of the outflowing medium in the circumferential direction without Trough shape possible. This is particularly advantageous with regard to a possible risk of clogging at the outflow surface.
Nachfolgend werden Ausführungsbeispiele der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt:
- Fig. 1
- einen Längsschnitt einer Vollmantelschneckenzentrifuge gemäß dem Stand der Technik entlang deren Zentrifugenachse,
- Fig. 2
- den rechten Teil des Längsschnitts gemäß
Fig. 1 in vergrößerter Darstellung, - Fig. 3
- den Schnitt III - III gemäß
Fig. 2 , - Fig. 4
- das Detail IV gemäß
Fig. 2 , - Fig. 5
- das Detail V gemäß
Fig. 2 , - Fig. 6
- einen Teil eines Längsschnitt einer Vollmantelschneckenzentrifuge gemäß einem ersten Ausführungsbeispiel der Erfindung,
- Fig. 7
- den Schnitt VII - VII gemäß
Fig. 6 , - Fig. 8
- einen Teil eines Längsschnitt einer Vollmantelschneckenzentrifuge gemäß einem zweiten Ausführungsbeispiel der Erfindung,
- Fig. 9
- den Schnitt IX - IX gemäß
Fig. 8 , - Fig. 10
- das Detail X gemäß
Fig. 8 einer ersten Variante, - Fig. 11
- das Detail XI gemäß
Fig. 6 einer zweiten Variante, - Fig. 12
- den Teil eines Schnitts IX - IX gemäß
Fig. 8 eines dritten AusfĂĽhrungsbeispiels der Erfindung, und - Fig. 13
- das Detail XIII gemäß
Fig. 12 in einer weiteren Variante.
- Fig. 1
- a longitudinal section of a Vollmantelschneckenzentrifuge according to the prior art along the centrifuge axis,
- Fig. 2
- the right part of the longitudinal section according to
Fig. 1 in an enlarged view, - Fig. 3
- Section III - III according to
Fig. 2 . - Fig. 4
- the detail IV according to
Fig. 2 . - Fig. 5
- the detail V according to
Fig. 2 . - Fig. 6
- a part of a longitudinal section of a solid bowl screw centrifuge according to a first embodiment of the invention,
- Fig. 7
- the section VII - VII according to
Fig. 6 . - Fig. 8
- a part of a longitudinal section of a solid bowl screw centrifuge according to a second embodiment of the invention,
- Fig. 9
- Section IX - IX according to
Fig. 8 . - Fig. 10
- the detail X according to
Fig. 8 a first variant, - Fig. 11
- the detail XI according to
Fig. 6 a second variant, - Fig. 12
- the part of a section IX - IX according to
Fig. 8 a third embodiment of the invention, and - Fig. 13
- the detail XIII according to
Fig. 12 in another variant.
Der Trommeldeckel 30 unterteilt sich in drei Trommeldeckelabschnitte, einen ersten, scheibenförmigen Trommeldeckelabschnitt 32, einen zweiten, hohlzylindrischen, dünnwandigen Trommeldeckelabschnitt 34 und einen dritten, hohlzylindrischen, dickwandigen Trommeldeckelabschnitt 36. Der erste, scheibenförmige Trommeldeckelabschnitt 32 ist mit dem Trommelkörper 28 verbunden. Der zweite, hohlzylindrische, dünnwandige Trommeldeckelabschnitt 34 ist bei der Lageranordnung 16 angeordnet und von der Lageranordnung 16 drehbar abgestützt. Der dritte, ebenfalls hohlzylindrische, aber dickwandige Trommeldeckelabschnitt 36 ist zwischen dem ersten und zweiten Trommeldeckelabschnitt 32, 34 angeordnet und an seinen beiden axialen Enden mit diesen einstückig verbunden.The
In dem Trommeldeckel 30 befinden sich ferner im ersten, scheibenförmigen Trommeldeckelabschnitt 32 mehrere Auslassöffnungen 38. An jeder der Auslassöffnungen 38 ist eine Wehrkante 40 angeordnet.In the
Innerhalb der Trommel 14 rotiert, mit vergleichsweise geringer Differenzdrehzahl, um die Zentrifugenachse 18 eine Schnecke 42. Die Schnecke 42 weist eine hohlzylinderförmige Schneckennabe 44 und eine diese umgebende Schneckenwendel 46 auf. Die Schnecke 42 ist mittels einer Lageranordnung 48 an dem Trommeldeckel 30 drehbar gelagert. In die Trommel 14 ist durch den Trommeldeckel 30 und die Schneckennabe 44 hindurch mittels eines Zuführrohrs 50 ein zu entmischendes bzw. zu klärendes Medium 52 einzubringen.Within the
Das zu klärende Medium 52 wird mittels der Rotation der Trommel um die Zentrifugenachse 18 einer hohen Zentrifugalkraft ausgesetzt und auf diese Weise in mehrere Phasen separiert. Es trennt sich in eine erste Phase bzw. ein abgeschiedenes Medium 54 und eine zweite Phase bzw. ein geklärtes Medium 56 auf. Das abgeschiedene Medium 54 setzt sich innenseitig am kreiszylindrischen Trommelkörper 28 der Trommel 14 ab und wird mittels der Schnecke 42 axial zum kegelförmigen Trommelabschluss 24 und dann entlang von diesem radial nach innen und durch die Auswurföffnungen 26 hindurch nach außen gefördert. Das in der Regel flüssige, geklärte Medium 56 schwimmt auf diesem abgeschiedenen Medium 54 auf und sammelt sich als so genannter Teich zur Zentrifugenachse 18 hin. Wenn eine vorbestimmte Teichtiefe bzw. ein Flüssigkeitsstand 58 erreicht ist, fließt das geklärte Medium 56 über die Wehrkanten 40 ab und wird von der Zentrifugenachse 18 weg, insbesondere in Radialrichtung 22 nach außen ausgetragen.The medium to be clarified 52 is exposed by means of the rotation of the drum around the
In
Die
Die drei Auslassöffnungen 38 auf der linken Seite und oben in der
Bei den Auslassöffnungen 38 auf der rechten Seite und unten in der
Die drei Wehrplatten 60 und die drei Kanalrinnen 62 sind dabei mittels Befestigungsschrauben 70 mit dem Trommeldeckel 30 verschraubt. In der Mitte der
Die
Im ersten Trommeldeckelabschnitt 32 sind Auslassöffnungen 38 ausgebildet, die sich schräg nach innen zur Zentrifugenachse 18 hin erstrecken und insbesondere sich nach außen hin aufweitend gestaltet sind.In the first
Die dritten und vierten Trommeldeckelabschnitte 82, 84 sind zwischen dem ersten und dem zweiten Trommeldeckelabschnitt 32, 34 angeordnet. Der dritte Trommeldeckelabschnitt 82 erstreckt sich nahe dem ersten Trommeldeckelabschnitt 32, innerhalb eines im Querschnitt ringförmigen, ersten Bereichs 86 und nahe dem zweiten Trommeldeckelabschnitt 34, innerhalb eines scheibenförmigen, zweiten Bereichs 88.The third and fourth
Der erste Bereich 86 schließt an dem ersten Trommeldeckelabschnitt 32 an und befindet sich in Radialrichtung außerhalb der zugehörigen Wehrkanten 40. Der erste Bereich 86 ist von mehreren Ausströmöffnungen 90 unterbrochen, aus denen das geklärte Medium 56, durch den Trommeldeckel 30 hindurch, nach radial außen abströmen kann.The
Der zweite Bereich 88 ist plattenförmig gestaltet und axial neben den Wehrkanten 40 und bezogen auf die Radialrichtung 22 außen und innen von diesen angeordnet. Er verbindet den ersten Bereich 86 mit dem zweiten Trommeldeckelabschnitt 34. Im zweiten Bereich 88 sind axial neben den Befestigungsschrauben 70 Montagebohrungen 92 vorgesehen, durch die hindurch diese Befestigungsschrauben 70 in Axialrichtung 20 montiert werden können. Der zweite Bereich 88 kann alternativ auch nichtplattenförmig, sondern mittels Speichen oder Streben sternförmig bzw. gitterförmig gestaltet sein, um den ersten Bereich 86 mit dem zweiten Trommeldeckelabschnitt 34 zu verbinden.The
Der vierte, relativ dünnwandige, rohrförmige Trommeldeckelabschnitt 84 verbindet in Radialrichtung 22 innen von den Auslassöffnungen 38 den ersten Trommeldeckelabschnitt 32 mit dem zweiten Bereich 88. Der vierte Trommeldeckelabschnitt 48 kann alternativ vieleckig gestaltet sein. Der vierte Trommeldeckelabschnitt 84 steift damit den Trommeldeckel 30 radial ganz weit innen zusätzlich aus. Er dient ferner dazu, dass ausströmendes, geklärtes Medium 56 nicht in Radialrichtung 22 nach innen gelangen kann.The fourth, relatively thin-walled, tubular
Wie in
In Radialrichtung 22 außerhalb der Auslassöffnungen 38 sind in
Die Elemente 94 des ersten Bereichs 86 liegen in je einem Kreissektor in Umfangsrichtung im Wesentlichen neben einer benachbarten Wehrkante 40. Die Anzahl der Elemente 94 ist dabei gleich der Anzahl an Wehrkanten 40 bzw. an Auslassöffnungen 38.The
Das geklärte Medium 56 fließt durch die Auslassöffnung 38 über die zugehörige Wehrkante 40 ab. Bei den drei Wehrplatten 60 mit jeweils dem breiten Abflussstrom 66, strömt das geklärte Medium 56 direkt nach radial außen durch die dortige Ausströmöffnung 90 zwischen zwei benachbarten Elementen 94 ab. Bei den drei Kanalrinnen 62 fließt das geklärte Medium 56 hingegen, aufgrund der Umlenkung in Rotationsrichtung, durch eine in Umfangsrichtung benachbarte Ausströmöffnung 90 ab. Das geklärte Medium 56 "überspringt" also eines der Elemente 94.The clarified medium 56 flows through the
Die
Bei dem ersten Trommeldeckelabschnitt 32 gemäß
Der dritte Trommeldeckelabschnitt 82 dieses Ausführungsbeispiels umfasst ebenfalls an dem ersten Trommeldeckelabschnitt 32 einen ringförmigen, unterbrochenen Bereich 86 und an dem zweiten Trommeldeckelabschnitt 34 einen scheibenförmigen Bereich 88. Der Bereich 86 ist in Radialrichtung 22 näher zur Zentrifugenachse 18 hin angeordnet. Die Scheibe des Bereichs 88 ist entsprechend im Durchmesser kleiner.The third
Wie in
Erfindungsgemäß ist hier wie in
Die Elemente 94 gemäß
Der Unterschied liegt bei dieser Kanalrinne 62 damit darin, dass der zweite und vierte Bereich 74, 78 sich mit der Abströmfläche 80 in Axialrichtung 20 von der Auslassöffnung 38 weg bis zu dem zweiten Bereich 88 des dritten Trommeldeckelabschnitts 82 erstrecken. Der zweite Bereich 88 übernimmt damit die Funktion des Umlenkens des austretenden, geklärten Mediums in Umfangsrichtung.The difference with this
In
Die drehrichtungsabhängige, fünfeckige Form, wie sie im Schnitt gemäß
Abschließend sei angemerkt, dass sämtlichen Merkmalen, die in den Anmeldungsunterlagen und insbesondere in den abhängigen Ansprüchen genannt sind, trotz des vorgenommenen formalen Rückbezugs auf einen oder mehrere bestimmte Ansprüche, auch einzeln oder in beliebiger Kombination eigenständiger Schutz zukommen soll.Finally, it should be noted that all the features that are mentioned in the application documents and in particular in the dependent claims, despite the formal reference to one or more specific claims, even individually or in any combination should receive independent protection.
- 1010
- VollmantelschneckenzentrifugeSolid bowl screw centrifuge
- 1212
- Gehäusecasing
- 1414
- Trommeldrum
- 1616
- Lageranordnungbearing arrangement
- 1818
- Zentrifugenachsecentrifuge axis
- 2020
- Axialrichtungaxially
- 2222
- Radialrichtungradial direction
- 2424
- Trommelabschlussdrum final
- 2626
- Auswurföffnungejection port
- 2828
- Trommelkörperdrum body
- 3030
- Trommeldeckeldrum lid
- 3232
- erster Trommeldeckelabschnittfirst drum lid section
- 3434
- zweiter Trommeldeckelabschnittsecond drum lid section
- 3636
- dritter Trommeldeckelabschnittthird drum lid section
- 3838
- Auslassöffnungoutlet
- 4040
- Wehrkanteweir edge
- 4242
- Schneckeslug
- 4444
- Schneckennabescrew hub
- 4646
- Schneckenwendelscrew spiral
- 4848
- Lageranordnungbearing arrangement
- 5050
- ZufĂĽhrrohrfeed
- 5252
- zu klärendes Mediumto be clarified medium
- 5454
- abgeschiedenes Mediumseparated medium
- 5656
- geklärtes Mediumclarified medium
- 5858
- FlĂĽssigkeitsstandliquid Level
- 6060
- Wehrplatteweir plate
- 6262
- Kanalrinnechannel channel
- 6464
- Rotationsrichtungdirection of rotation
- 6666
- Abflussstromeffluent stream
- 6868
- Abflussstromeffluent stream
- 7070
- Befestigungsschraubenmounting screws
- 7272
- BereichArea
- 7474
- BereichArea
- 7676
- BereichArea
- 7878
- BereichArea
- 8080
- Abströmflächeoutflow
- 8282
- dritter Trommeldeckelabschnittthird drum lid section
- 8484
- vierter Trommeldeckelabschnittfourth drum lid section
- 8686
- erster Bereichfirst area
- 8888
- zweiter Bereichsecond area
- 9090
- Ausströmöffnungoutflow
- 9292
- Montagebohrungmounting hole
- 9494
- Elementelement
Claims (10)
dadurch gekennzeichnet, dass der mindestens eine dritte Trommeldeckelabschnitt (82; 86; 94) sich in Radialrichtung (22) betrachtet in Bezug auf die Wehrkante (40) radial auĂźen befindet.
characterized in that the at least one third drum cover portion (82; 86; 94) is radially outward of the weir edge (40) when viewed in the radial direction (22).
dadurch gekennzeichnet, dass der mindestens eine dritte Trommeldeckelabschnitt (82; 86; 94) derart positioniert und dimensioniert ist, dass bei Betriebsdrehzahl der Vollmantelschneckenzentrifuge (10) das geklärte Medium (56) aus der mindestens einen Auslassöffnung (38) in Umfangsrichtung und nach radial außen austritt, ohne dabei auf den mindestens einen dritten Trommeldeckelabschnitt (82; 86; 94) aufzutreffen.Drum cover according to claim 1,
characterized in that the at least one third drum cover portion (82; 86; 94) is positioned and dimensioned such that at operating speed of the solid bowl screw centrifuge (10) the clarified medium (56) from the at least one outlet opening (38) is circumferentially and radially outwardly emerges without impacting the at least one third drum cover portion (82; 86; 94).
dadurch gekennzeichnet, dass der mindestens eine dritte Trommeldeckelabschnitt (82; 86; 94) sich in Umfangsrichtung betrachtet neben der Wehrkante (40) befindet.Drum cover according to claim 1 or 2,
characterized in that the at least one third drum cover portion (82; 86; 94) is circumferentially next to the weir edge (40).
dadurch gekennzeichnet, dass die Anzahl an dritten Trommeldeckelabschnitten (82, 86; 94) gleich der Anzahl an Auslassöffnungen (38) ist.Drum cover according to one of claims 1 to 3,
characterized in that the number of third drum lid portions (82, 86, 94) is equal to the number of outlet openings (38).
dadurch gekennzeichnet, dass der mindestens eine dritte Trommeldeckelabschnitt (82; 86; 94) in Axialrichtung (20) betrachtet im Querschnitt im Wesentlichen dreieckig gestaltet ist.Drum cover according to one of claims 1 to 4,
characterized in that the at least one third drum cover portion (82; 86; 94) in the axial direction (20) viewed in cross section is designed substantially triangular.
dadurch gekennzeichnet, dass der mindestens eine dritte Trommeldeckelabschnitt (82; 86; 94) in Axialrichtung (20) betrachtet im Querschnitt im Wesentlichen sechseckig gestaltet ist.Drum cover according to one of claims 1 to 4,
characterized in that the at least one third drum cover section (82; 86; 94), viewed in the axial direction (20), is substantially hexagonal in cross-section.
dadurch gekennzeichnet, dass mindestens ein vierter Trommeldeckelabschnitt (84) vorgesehen ist, ĂĽber den ebenfalls der erste Trommeldeckelabschnitt (32) mit dem zweiten Trommeldeckelabschnitt (34) statisch verbunden ist, wobei der mindestens eine vierte Trommeldeckelabschnitt (84) sich in Radialrichtung (22) betrachtet in Bezug auf die jeweilige Wehrkante (40) radial innen befindet.Drum cover according to one of claims 1 to 6,
characterized in that at least a fourth drum lid portion (84) is provided, via which also the first drum lid portion (32) is statically connected to the second drum lid portion (34), the at least one fourth drum lid portion (84) viewed in the radial direction (22) located radially inward with respect to the respective weir edge (40).
dadurch gekennzeichnet, dass die Wehrkante (40) an einer Wehrplatte (60) ausgebildet ist, die in Axialrichtung (20) betrachtet vor der zugehörigen Auslassöffnung (38) an dem ersten Trommeldeckelabschnitt (32) angebracht ist.Drum cover according to one of claims 1 to 7,
characterized in that the weir edge (40) on a weir plate (60) is formed, which in the axial direction (20) viewed in front of the associated outlet opening (38) on the first drum cover portion (32) is mounted.
dadurch gekennzeichnet, dass die Wehrkante (40) an einer Kanalrinne (62) ausgebildet ist, die in Axialrichtung (20) betrachtet vor der zugehörigen Auslassöffnung (38) an dem ersten Trommeldeckelabschnitt (32) angebracht ist.Drum cover according to one of claims 1 to 7,
characterized in that the weir edge (40) formed on a channel groove (62) as viewed in the axial direction (20) before the associated outlet opening (38) on the first drum cover portion (32) is mounted.
dadurch gekennzeichnet, dass die Wehrkante (40) an einer Abströmfläche (80) ausgebildet ist, die in Axialrichtung (20) betrachtet sich von dem ersten Trommeldeckelabschnitt (32) zu dem dritten Trommeldeckelabschnitt (82) erstreckt.Drum cover according to one of claims 1 to 6,
characterized in that the weir edge (40) is formed on an outflow surface (80) which, viewed in the axial direction (20), extends from the first drum cover section (32) to the third drum cover section (82).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015122006.7A DE102015122006A1 (en) | 2015-12-16 | 2015-12-16 | Drum cover of a solid bowl screw centrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3181231A1 true EP3181231A1 (en) | 2017-06-21 |
EP3181231B1 EP3181231B1 (en) | 2020-01-29 |
Family
ID=57209247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16195749.3A Active EP3181231B1 (en) | 2015-12-16 | 2016-10-26 | Drum lid of a solid bowl screw centrifuge |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3181231B1 (en) |
DE (1) | DE102015122006A1 (en) |
DK (1) | DK3181231T3 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010020901A1 (en) * | 2010-05-18 | 2011-11-24 | Gea Mechanical Equipment Gmbh | Solid bowl centrifuge |
DE102012004548A1 (en) * | 2012-03-10 | 2013-09-12 | Flottweg Se | Drum centrifuge with an inlet acceleration device and an outlet brake device |
DE102014108722A1 (en) * | 2014-04-30 | 2015-11-05 | Hiller Gmbh | screw centrifuge |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6589154B2 (en) | 2001-05-30 | 2003-07-08 | Alfa Laval Inc. | Decanter centrifuge with a gear box mounted on the bowl |
DK178254B1 (en) * | 2010-11-12 | 2015-10-12 | Alfa Laval Corp Ab | Centrifugal separator, abrasion resistant element and set of abrasion resistant elements for a centrifugal separator |
-
2015
- 2015-12-16 DE DE102015122006.7A patent/DE102015122006A1/en active Pending
-
2016
- 2016-10-26 EP EP16195749.3A patent/EP3181231B1/en active Active
- 2016-10-26 DK DK16195749.3T patent/DK3181231T3/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010020901A1 (en) * | 2010-05-18 | 2011-11-24 | Gea Mechanical Equipment Gmbh | Solid bowl centrifuge |
DE102012004548A1 (en) * | 2012-03-10 | 2013-09-12 | Flottweg Se | Drum centrifuge with an inlet acceleration device and an outlet brake device |
DE102014108722A1 (en) * | 2014-04-30 | 2015-11-05 | Hiller Gmbh | screw centrifuge |
Also Published As
Publication number | Publication date |
---|---|
EP3181231B1 (en) | 2020-01-29 |
DK3181231T3 (en) | 2020-04-14 |
DE102015122006A1 (en) | 2017-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2598251B1 (en) | Solid bowl screw centrifuge having an overflow weir | |
EP0268752B1 (en) | Apparatus for the mechanical purification of liquids | |
DE1815199A1 (en) | centrifuge | |
EP2872256B1 (en) | Solid-bowl screw centrifuge with overflow weir | |
EP2658656B1 (en) | Solid bowl screw centrifuge having an overflow weir | |
EP3426405B1 (en) | Separator | |
DE3015833A1 (en) | SCREEN DEVICE FOR PULP | |
EP1786565B1 (en) | Self-dumping separator with a disc stack | |
EP3840926B1 (en) | Filtering device for highly viscous media | |
DE2507762B2 (en) | Dynamic filter | |
EP3618968A1 (en) | Decanter centrifuge | |
DE2234076C3 (en) | Agitator mill | |
DE10338770B4 (en) | Centrifugal separator and method for purifying a fluid stream | |
EP2433692A1 (en) | Device for screening and removing material from a liquid flowing in a channel | |
EP2926911B1 (en) | Solid bowl worm centrifuge with a connection flange | |
EP1645320A1 (en) | Centrifugal separator | |
DE202004005983U1 (en) | Condensate filter, especially for air treatment modules | |
DE102012004544B4 (en) | Drum centrifuge with an inlet accelerator | |
EP3181231B1 (en) | Drum lid of a solid bowl screw centrifuge | |
DE69312643T2 (en) | CENTRIFUGAL SEPARATOR | |
DE3872713T2 (en) | CENTRIFUGAL SHEATH DEVICE WITH UNLOADING DEVICE. | |
DE60035268T2 (en) | Centrifuge rotor with reaction drive | |
DE2057555C3 (en) | Screw centrifuge | |
EP2551019B1 (en) | Solid bowl screw centrifuge with a weir edge | |
EP0561857B1 (en) | Centrifugal cleaning filter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20171221 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20190926 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1228100 Country of ref document: AT Kind code of ref document: T Effective date: 20200215 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502016008512 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 Effective date: 20200410 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20200129 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200621 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200429 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200430 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200429 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200529 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R026 Ref document number: 502016008512 Country of ref document: DE |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
26 | Opposition filed |
Opponent name: ALFA LAVAL CORPORATE AB Effective date: 20201013 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 |
|
PLAF | Information modified related to communication of a notice of opposition and request to file observations + time limit |
Free format text: ORIGINAL CODE: EPIDOSCOBS2 |
|
PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20201026 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201026 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20201031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201031 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201031 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201026 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201026 |
|
PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |
|
R26 | Opposition filed (corrected) |
Opponent name: ALFA LAVAL CORPORATE AB Effective date: 20201013 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200129 |
|
APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |
|
APBM | Appeal reference recorded |
Free format text: ORIGINAL CODE: EPIDOSNREFNO |
|
APBP | Date of receipt of notice of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA2O |
|
APBM | Appeal reference recorded |
Free format text: ORIGINAL CODE: EPIDOSNREFNO |
|
APBP | Date of receipt of notice of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA2O |
|
APBQ | Date of receipt of statement of grounds of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA3O |
|
APBQ | Date of receipt of statement of grounds of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA3O |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230531 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20231006 Year of fee payment: 8 Ref country code: SE Payment date: 20231023 Year of fee payment: 8 Ref country code: IT Payment date: 20231024 Year of fee payment: 8 Ref country code: FR Payment date: 20231026 Year of fee payment: 8 Ref country code: DK Payment date: 20231023 Year of fee payment: 8 Ref country code: DE Payment date: 20231030 Year of fee payment: 8 Ref country code: AT Payment date: 20231018 Year of fee payment: 8 |
|
APBU | Appeal procedure closed |
Free format text: ORIGINAL CODE: EPIDOSNNOA9O |