EP2130607B1 - Centrifugal separator - Google Patents
Centrifugal separator Download PDFInfo
- Publication number
- EP2130607B1 EP2130607B1 EP08425404A EP08425404A EP2130607B1 EP 2130607 B1 EP2130607 B1 EP 2130607B1 EP 08425404 A EP08425404 A EP 08425404A EP 08425404 A EP08425404 A EP 08425404A EP 2130607 B1 EP2130607 B1 EP 2130607B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw feeder
- drum
- channel
- centrifugal separator
- mix
- 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.)
- Not-in-force
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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
- B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/06—Arrangement of distributors or collectors in centrifuges
-
- 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
- B04B2001/2033—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 with feed accelerator inside the conveying screw
-
- 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 present invention relates to a centrifugal separator for treating sludges, suspensions and, in general, mixes of substances in the liquid phase and substances in the solid phase, adapted to separate more or less accurately the liquid phase from the solid phase.
- centrifugal separator consists of a drum which rotates at high speed and is provided with an internal screw feeder. The loaded sludge undergoes centrifugation, during which the phases stratify; the phase with highest density (solid phase) is arrange on the outermost annular region.
- the screw feeder rotates at a different rate with respect to the drum and entrains the solid phase toward the discharge.
- the water (liquid phase) exits from the opposite side.
- the liquid phase discharged by the separator is generally rather rich in the solid sediments: this means that the separation process does not ensure the result of correct separation of the solid phase from the liquid phase.
- separation is required by environmental needs (separation of pollutants) or by the need to recover valuable material (treatment of mining sludges), it is absolutely necessary for the separation to be as thorough as possible.
- the aim of the present invention is to provide a centrifugal separator which is suitable for high-performance separation of the solid phase and of the liquid phase of a mix.
- an object of the present invention is to provide a centrifugal separator in which settling of the solid phase along the liquid phase expulsion path does not occur.
- Another object of the present invention is to provide a centrifugal separator which can be operated easily, since it does not require particular maintenance.
- Another object of the present invention is to provide a centrifugal separator with an architecture which is particularly simple and can be assembled easily.
- Another object of the present invention is to provide a centrifugal separator which has low costs, is relatively simple to provide in practice and is safe in application.
- the reference numeral 1 generally designates a centrifugal separator according to the invention.
- the centrifugal separator 1 comprises an outer casing 2, within which a hollow drum 3 is actuated so that it can rotate: with reference to the general nature of the description, for example, the separator 1 might also comprise a plurality of mutually independent drums 3 contained within a common casing 2 or within respective separate casings 2.
- a first screw feeder 4 is actuated so that it can rotate, at a speed which is substantially higher than the speed of the respective drum 3, inside the drum 3 itself; the first screw feeder 4, during its relative rotation with respect to the corresponding drum 3, skins internal surfaces 5 thereof.
- This relative motion is intended to convey the solids toward the outlet.
- the separator 1 further comprises a circuit 6 for feeding a solid-liquid fit mix and respective circuits for separate expulsion of the solid phase and of the liquid phase.
- the solid-liquid mix can be of different kinds: in particular, the separator 1 according to the invention is suitable for treating sludge and the like, but use with other mixes of another kind which require separation of the solid phase from the liquid phase is not excluded.
- separators 1 are particularly suitable for treating mixes for purification purposes (therefore environmental use and the like) and for selection purposes (use in mines or other plants adapted to provide a raw material which contains a small part of valuable material to be selected).
- the mix feed circuit 6 comprises an inlet 7 and a respective channel 8 which leads out along at least one portion 9 of the internal surface 5 of the drum 3: this embodiment allows the delivery of mix along the internal surface 5, proximate to its initial edge 10, of the rotating drum 3.
- the feed circuit 6 comprises one inlet 7 which is arranged at one end 11 of the casing 2.
- the end 11 is opposite to an end 12 in which an opening 13 for expelling the solid phase is located.
- the inlet 7 leads, by means of the respective channel 8, to an annular chamber 14, which lies inside the casing 2 and the drum 3.
- the chamber 14 is adapted to force the translational motion of the introduced mix in a radial direction by centrifugal action toward the portion 9 of the internal wall 5 of the drum 3.
- the annular input chamber 14 is arranged upstream of the beginning of a first start 15 of the first screw feeder 4.
- the circuit for expelling the liquid phase comprises a channel 16, which is coaxial to the at least one first screw feeder 4 and lies inside it in its portion located further upstream.
- the channel 16 is adapted to convey the liquid phase with an axial orientation with respect to the rotation axis of the separator 1 and in the opposite direction with respect to the advancement direction of the solid phase on the drum 3 by way of the action of the first screw feeder 4.
- the channel 16 comprises at least one portion of at least one second screw feeder 17, in which the crests face, and are proximate to, an internal surface 18 of the channel 16 to remove any solid sediment from the surface 18 and to convey the removed sediment toward the main screw feeder 4.
- Continuous removal of sediment by the crests of the second screw feeder 17 from the internal surface 18 of the channel 16 ensures that such sediment does not accumulate and therefore that the operation of the separator 1 is not compromised by the presence of solid sediment in the liquid phase discharge channel 16.
- this solution entails the possibility to reduce greatly maintenance interventions (aimed at cleaning the liquid phase discharge channel) and therefore allows less expensive and simpler operation than known types of separator.
- the second screw feeder 17 in an embodiment of particular interest in practice and in application, is constituted by a ribbonlike ring which is arranged in a helical pattern on a plurality of radial supporting arms which extend from the channel 16: this embodiment ensures that a channel 16 of large size is available although the second screw feeder 17 designed to remove the sediment from the surface 18 is present.
- the drum 3 and the first screw feeder 4 have a first upstream portion 19 which is substantially cylindrical and a second downstream portion 20 which is substantially frustum-shaped.
- the first portion 19 is arranged directly downstream of the region where the mix is introduced by the feed circuit 6, while the second portion 20 has its end part substantially aligned with the opening 13 for expelling the solid phase.
- the crest of the first screw feeder 4 faces, and is proximate to, the internal surface 5 of the drum 3, while the crest of the second screw feeder 17 faces, and is proximate to, the internal surface 18 of the channel 16.
- both crests skim the corresponding surfaces 5 and 18 to remove and convey the solid phase deposited thereon.
- the first screw feeder comprises, at a part 21 of the first portion 19, at least one tubular portion 22, within which the second screw feeder 17 is accommodated so that it can rotate.
- the second screw feeder 17 is jointly connected to the corresponding drum 3; the corresponding crests therefore slide proximate to the internal surface of the tubular portion 22 of the first screw feeder 4: the starts of the second screw feeder 17 are arranged in a helical winding direction which is opposite with respect to the direction of the first screw feeder 4.
- a relative speed of the first screw feeder 4 with respect to the drum 3 causes an advancement, toward the respective expulsion opening 13, of the solid phase, in the drum 3, by way of the action of the first screw feeder 4, and in the tubular portion 22, by way of the action of the second screw feeder 17.
- a positive relative speed (which therefore corresponds to a higher rotation rate for the screw feeder 4 with respect to the drum 3) in fact entails entrainment toward the opening 13 of the solid matter comprised between the starts of the first screw feeder 4.
- the relative speed is such that the tubular portion 22 (connected to the first screw feeder 4) move at a higher speed than the second screw feeder 17 (the relative speed is therefore negative in this case): since the helical winding direction is opposite with respect to the one of the first screw feeder 4, transfer of the sediment that is present on the surface of the channel 16 (internal surface of the portion 22) toward the opening 13 still occurs.
- the separator 1 further comprises at least one external traction unit (not shown in the figure), which is intended to drive rotationally the drum 3, jointly with the second screw feeder 17, and the first screw feeder 4.
- at least one external traction unit (not shown in the figure), which is intended to drive rotationally the drum 3, jointly with the second screw feeder 17, and the first screw feeder 4.
- the different diameter of the pulleys 23, 24 determines the different rotation rate of the drum 3 with respect to the first screw feeder 4.
- passages 25 designed to allow the outflow of the liquid phase through the respective channel 16.
- the remaining solid phase continues to be entrained by the first screw feeder 4 to the opening 13: the centrifugal action contributes, throughout the entrainment, to separate from the solid phase the liquid phase, which tends to retract to be then expelled through the channel 16.
- the second screw feeder 17 (by way of its relative movement with respect to the walls of the channel constituted by the internal surface of the tubular portion 22 of the screw feeder 4) removes sediment from the surfaces that face it.
Abstract
Description
- The present invention relates to a centrifugal separator for treating sludges, suspensions and, in general, mixes of substances in the liquid phase and substances in the solid phase, adapted to separate more or less accurately the liquid phase from the solid phase.
- Known types of centrifugal separator consists of a drum which rotates at high speed and is provided with an internal screw feeder. The loaded sludge undergoes centrifugation, during which the phases stratify; the phase with highest density (solid phase) is arrange on the outermost annular region.
- The screw feeder rotates at a different rate with respect to the drum and entrains the solid phase toward the discharge. The water (liquid phase) exits from the opposite side.
- Known types of centrifugal separator have several drawbacks.
- First of all, the liquid phase discharged by the separator is generally rather rich in the solid sediments: this means that the separation process does not ensure the result of correct separation of the solid phase from the liquid phase. When separation is required by environmental needs (separation of pollutants) or by the need to recover valuable material (treatment of mining sludges), it is absolutely necessary for the separation to be as thorough as possible.
- Secondly, it should be noted that continuous settling of solid material occurs along the path of the discharge of the liquid phase and leads, in the medium and long term, to obstruction of such path.
- It is therefore necessary to provide continuous maintenance to clean the path: these operations must provide for a rather complex machine architecture in order to ensure easy access to the path to be cleaned. This constructive architecture necessarily causes an increase in the production and design costs of the machine.
-
DE 14 82 721 A1 discloses a centrifugal separator having a combination of elements as set forth in the pre-characterizing portion of the appendedclaim 1. - The aim of the present invention is to provide a centrifugal separator which is suitable for high-performance separation of the solid phase and of the liquid phase of a mix.
- Within this aim, an object of the present invention is to provide a centrifugal separator in which settling of the solid phase along the liquid phase expulsion path does not occur.
- Another object of the present invention is to provide a centrifugal separator which can be operated easily, since it does not require particular maintenance.
- Another object of the present invention is to provide a centrifugal separator with an architecture which is particularly simple and can be assembled easily.
- Another object of the present invention is to provide a centrifugal separator which has low costs, is relatively simple to provide in practice and is safe in application.
- In accordance with the invention, there is provided a centrifugal separator as defined in the appended claims.
- Further characteristics and advantages of the invention will become better apparent and evident from the following detailed description of a preferred but not exclusive embodiment of a centrifugal separator, illustrated by way of non-limiting example in the accompanying drawings, wherein.
-
Figure 1 is a sectional front view, taken along an axial longitudinal plane, of a centrifugal separator according to the invention; -
Figure 2 is an enlarged-scale sectional front view, taken along an axial longitudinal plane, of a detail of a centrifugal separator according to the invention. - With reference to the figures, the
reference numeral 1 generally designates a centrifugal separator according to the invention. - A particularly simple and efficient embodiment is described hereafter: any structural complication that entails the adoption of multiple equivalent components and/or the partial use of the components that are present is to be understood as being comprised in any case within the scope of the present description.
- The
centrifugal separator 1 comprises anouter casing 2, within which ahollow drum 3 is actuated so that it can rotate: with reference to the general nature of the description, for example, theseparator 1 might also comprise a plurality of mutuallyindependent drums 3 contained within acommon casing 2 or within respectiveseparate casings 2. - A
first screw feeder 4 is actuated so that it can rotate, at a speed which is substantially higher than the speed of therespective drum 3, inside thedrum 3 itself; thefirst screw feeder 4, during its relative rotation with respect to thecorresponding drum 3, skinsinternal surfaces 5 thereof. - This relative motion is intended to convey the solids toward the outlet.
- The same result can be achieved by working on the following parameters:
- direction of rotation
- turn winding direction
- relative speed of the
screw feeder 4 and of thedrum 3 - The possible combinations for achieving correct operation (and therefore the desired outflow of the solids) are the following:
- ➢
screw feeder 4 with right-handed helix, operating condition in which thedrum 3 is faster than thescrew feeder 4 with a clockwise rotation (if viewed from the liquid discharge region); - ➢
screw feeder 4 with right-handed helix, operating condition in which thedrum 3 is slower than thescrew feeder 4 with a counterclockwise rotation (if viewed from the liquid discharge region); - ➢
screw feeder 4 with left-handed helix, operating condition in which thedrum 3 is slower than thescrew feeder 4 with a clockwise rotation (if viewed from the liquid discharge region); - ➢
screw feeder 4 with left-handed helix, operating condition in which thedrum 3 is faster than thescrew feeder 4 with a counterclockwise rotation (if viewed from the liquid discharge region). - Although only one of these constructive solutions is described in detail, it is evident that they are equivalent from a mechanical standpoint and therefore are fully within the scope of the protection of the present invention.
- The
separator 1 further comprises acircuit 6 for feeding a solid-liquid fit mix and respective circuits for separate expulsion of the solid phase and of the liquid phase. - The solid-liquid mix can be of different kinds: in particular, the
separator 1 according to the invention is suitable for treating sludge and the like, but use with other mixes of another kind which require separation of the solid phase from the liquid phase is not excluded. - It is noted that the
separators 1 are particularly suitable for treating mixes for purification purposes (therefore environmental use and the like) and for selection purposes (use in mines or other plants adapted to provide a raw material which contains a small part of valuable material to be selected). - In the
centrifugal separator 1 according to the invention, themix feed circuit 6 comprises aninlet 7 and arespective channel 8 which leads out along at least oneportion 9 of theinternal surface 5 of the drum 3: this embodiment allows the delivery of mix along theinternal surface 5, proximate to itsinitial edge 10, of the rotatingdrum 3. - This constructive choice to provide the
separator 1 with the mix directly proximate to the internal surface of thedrum 3 allows to facilitate the immediate stratification of the mix, with consequent centrifugal separation of the solid phase from the liquid phase. In known types of separator, the mix is introduced coaxially with respect to the drum and this entails a subsequent transfer by centrifugal action of such mix toward the walls of the drum: of course, a transfer of the mix in this manner entails the onset of turbulence which compromises the desired solid/liquid stratification. - Determining a constructive architecture in which the mix is dispensed directly in the
separator 1 proximate to theinternal surface 5 of thedrum 3 ensures that an optimum centrifugal stratification is achieved immediately, minimizing interference caused by any turbulence and the like. - In particular, the
feed circuit 6 comprises oneinlet 7 which is arranged at oneend 11 of thecasing 2. - The
end 11 is opposite to anend 12 in which an opening 13 for expelling the solid phase is located. - The
inlet 7 leads, by means of therespective channel 8, to anannular chamber 14, which lies inside thecasing 2 and thedrum 3. Thechamber 14 is adapted to force the translational motion of the introduced mix in a radial direction by centrifugal action toward theportion 9 of theinternal wall 5 of thedrum 3. - The
annular input chamber 14 is arranged upstream of the beginning of afirst start 15 of thefirst screw feeder 4. - The circuit for expelling the liquid phase comprises a
channel 16, which is coaxial to the at least onefirst screw feeder 4 and lies inside it in its portion located further upstream. Thechannel 16 is adapted to convey the liquid phase with an axial orientation with respect to the rotation axis of theseparator 1 and in the opposite direction with respect to the advancement direction of the solid phase on thedrum 3 by way of the action of thefirst screw feeder 4. - In particular, the
channel 16 comprises at least one portion of at least onesecond screw feeder 17, in which the crests face, and are proximate to, aninternal surface 18 of thechannel 16 to remove any solid sediment from thesurface 18 and to convey the removed sediment toward themain screw feeder 4. Continuous removal of sediment by the crests of thesecond screw feeder 17 from theinternal surface 18 of thechannel 16 ensures that such sediment does not accumulate and therefore that the operation of theseparator 1 is not compromised by the presence of solid sediment in the liquidphase discharge channel 16. In practice, this solution entails the possibility to reduce greatly maintenance interventions (aimed at cleaning the liquid phase discharge channel) and therefore allows less expensive and simpler operation than known types of separator. - It should be noted that the
second screw feeder 17, in an embodiment of particular interest in practice and in application, is constituted by a ribbonlike ring which is arranged in a helical pattern on a plurality of radial supporting arms which extend from the channel 16: this embodiment ensures that achannel 16 of large size is available although thesecond screw feeder 17 designed to remove the sediment from thesurface 18 is present. - The
drum 3 and thefirst screw feeder 4 have a firstupstream portion 19 which is substantially cylindrical and a seconddownstream portion 20 which is substantially frustum-shaped. - The
first portion 19 is arranged directly downstream of the region where the mix is introduced by thefeed circuit 6, while thesecond portion 20 has its end part substantially aligned with theopening 13 for expelling the solid phase. - The crest of the first screw feeder 4 faces, and is proximate to, the
internal surface 5 of thedrum 3, while the crest of the second screw feeder 17 faces, and is proximate to, theinternal surface 18 of thechannel 16. - During operation, both crests skim the
corresponding surfaces - The first screw feeder comprises, at a
part 21 of thefirst portion 19, at least onetubular portion 22, within which thesecond screw feeder 17 is accommodated so that it can rotate. - The
second screw feeder 17 is jointly connected to thecorresponding drum 3; the corresponding crests therefore slide proximate to the internal surface of thetubular portion 22 of the first screw feeder 4: the starts of thesecond screw feeder 17 are arranged in a helical winding direction which is opposite with respect to the direction of thefirst screw feeder 4. - A relative speed of the
first screw feeder 4 with respect to thedrum 3 causes an advancement, toward the respective expulsion opening 13, of the solid phase, in thedrum 3, by way of the action of thefirst screw feeder 4, and in thetubular portion 22, by way of the action of thesecond screw feeder 17. A positive relative speed (which therefore corresponds to a higher rotation rate for thescrew feeder 4 with respect to the drum 3) in fact entails entrainment toward the opening 13 of the solid matter comprised between the starts of thefirst screw feeder 4. Simultaneously, the relative speed is such that the tubular portion 22 (connected to the first screw feeder 4) move at a higher speed than the second screw feeder 17 (the relative speed is therefore negative in this case): since the helical winding direction is opposite with respect to the one of thefirst screw feeder 4, transfer of the sediment that is present on the surface of the channel 16 (internal surface of the portion 22) toward theopening 13 still occurs. - The
separator 1 further comprises at least one external traction unit (not shown in the figure), which is intended to drive rotationally thedrum 3, jointly with thesecond screw feeder 17, and thefirst screw feeder 4. - In particular, it is possible to adopt a single unit which is associated with
respective pulleys pulley 23 being coupled to thedrum 3 and to thesecond screw feeder 17 and theother pulley 24 being coupled to thefirst screw feeder 4. - The different diameter of the
pulleys drum 3 with respect to thefirst screw feeder 4. - Introduction of the mix through the
circuit 6 entails that such mix flows by way of the action of the first screw feeder along thepart 21 until it reaches the end of the firstupstream portion 19. - At the end of the
portion 19 there arepassages 25 designed to allow the outflow of the liquid phase through therespective channel 16. - The remaining solid phase continues to be entrained by the
first screw feeder 4 to the opening 13: the centrifugal action contributes, throughout the entrainment, to separate from the solid phase the liquid phase, which tends to retract to be then expelled through thechannel 16. - The second screw feeder 17 (by way of its relative movement with respect to the walls of the channel constituted by the internal surface of the
tubular portion 22 of the screw feeder 4) removes sediment from the surfaces that face it. - It has thus been shown that the invention achieves the proposed aim and objects.
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (7)
- A centrifugal separator (1), of the type that comprises an outer casing (2), within which at least one hollow drum (3) is actuated so that it can rotate, at least one first screw feeder (4) which is actuated so that it can rotate, at a speed which is substantially higher than the speed of the respective drum (3), within said drum (3), skimming its internal surfaces (5), a circuit (6) for feeding a solid-liquid mix and respective circuits for the separate expulsion of the solid phase and of the liquid phase, the mix feed circuit (6) comprising an inlet (7) and a respective channel (8) which leads out along at least one portion (9) of the internal surface (5) of said drum (3) to dispense mix along the internal surface. (5) of said rotatable drum (3), said circuit for expelling the liquid phase comprising a channel (16) which is coaxial to said at least one first screw feeder (4) and is internal thereto in its portion located further upstream, said channel (16) being adapted to convey said separated liquid phase in an axial orientation with respect to the rotation axis of the separator (1) and in the opposite direction with respect to the advancement direction of said solid phase on the at least one drum (3) by way of the action of said at least one first screw feeder (4), said channel (16) comprising at least one portion of at least one second screw feeder (17) whose crests face, and lie proximate to, the internal surface (18) of said channel (16) for the removal of any solid sediment from said surface (18) and for the conveyance of said removed sediment towards the at least one first main screw feeder (4), characterized in that said feed circuit (6) comprises an inlet (7) which is arranged at an end (11) of said casing (2), said end (11) being arranged opposite the end (12) in which the opening (13) for expelling the solid phase is arranged, said inlet (7) leading, by means of a channel (8), to an annular chamber (14) which lies inside said casing (2) and said at least one drum (3), said chamber (14) being adapted to impose a translational motion in a radial direction by centrifugal action, toward at least one portion (9) of the internal wall (5) of said at least one drum (3), of the introduced mix, said annular intake chamber (14) being arranged upstream of the beginning of the first start (15) of said at least one first screw feeder (4).
- The centrifugal separator according to claim 1, characterized in that said at least one drum (3) and said corresponding at least one first screw feeder (4) have a first upstream portion (19) which is substantially cylindrical and a second downstream portion (20) which is substantially frustum-shaped, said first portion (19) being arranged directly downstream of the region where the mix is introduced by said feed circuit (6) and said second portion (20) having its end part which is substantially aligned with an opening (13) for expelling the solid phase.
- The centrifugal separator according to claim 1, characterized in that the crest of said at least one first screw feeder (4) and the crest of said at least one second screw feeder (17) face, and lie proximate to, respectively the internal surface (5) of said drum (3) and to the internal surface (18) of said channel (16), skimming, during the operation of said separator (1), said surfaces (5) and (18) to remove and convey the solid phase deposited thereon.
- The centrifugal separator according to one or more of the preceding claims, characterized in that said at least one first screw feeder (4) comprises, at a part (21) of said first portion (19), at least one tubular portion (22), within which the at least one second screw feeder (17) is accommodated so that it can rotate.
- The centrifugal separator according to one or more of the preceding claims, characterized in that said at least one second screw feeder (17) is coupled to the corresponding drum (3), the corresponding crests sliding proximate to the internal surface (18) of said tubular portion (22) of said first screw feeder (4), the starts of said at least one second screw feeder (17) being arranged in the opposite direction with respect to the starts (15) of said at least one first screw feeder (4), a relative speed of the first screw feeder (4) with respect to the drum (3) producing an advancement, toward the respective expulsion opening (13), of the solid phase in the drum (3) by way of the action of the at least one first screw feeder (4) and in the tubular portion (22) by way of the action of the at least one second screw feeder (17).
- The centrifugal separator according to one or more of the preceding claims, characterized in that it comprises at least one external traction unit which is intended to entrain rotationally said at least one hollow drum (3) jointly with the at least one second screw feeder (17) and said at least one first screw feeder (4).
- The centrifugal separator according to the preceding claim, characterized in that said unit is a single unit and is associated with respective pulleys (23, 24) having different diameters, one pulley (23) being coupled to said at least one drum (3) and to said second screw feeder (17) and the other pulley (24) being coupled to said first screw feeder (4), the different diameter of the pulleys (23, 24) determining the different rotation rate of the at least one drum (3) with respect to the at least one first screw feeder (4).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES08425404T ES2385878T3 (en) | 2008-06-06 | 2008-06-06 | Centrifugal separator |
EP08425404A EP2130607B1 (en) | 2008-06-06 | 2008-06-06 | Centrifugal separator |
AT08425404T ATE552908T1 (en) | 2008-06-06 | 2008-06-06 | CENTRIFUGAL SEPARATOR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08425404A EP2130607B1 (en) | 2008-06-06 | 2008-06-06 | Centrifugal separator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2130607A1 EP2130607A1 (en) | 2009-12-09 |
EP2130607B1 true EP2130607B1 (en) | 2012-04-11 |
Family
ID=39797949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08425404A Not-in-force EP2130607B1 (en) | 2008-06-06 | 2008-06-06 | Centrifugal separator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2130607B1 (en) |
AT (1) | ATE552908T1 (en) |
ES (1) | ES2385878T3 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE638716A (en) * | 1962-10-16 | |||
DK108565C (en) | 1964-07-18 | 1968-01-02 | Thrige Titan As | Centrifuge. |
JPS5610353A (en) * | 1979-07-05 | 1981-02-02 | Suguru Katsume | Completely-enclosed type screw-carrying centrifugal separator |
DE4005755A1 (en) * | 1989-10-17 | 1991-04-18 | Kloeckner Humboldt Deutz Ag | FULL-COVERED SNAIL CENTRIFUGE |
-
2008
- 2008-06-06 AT AT08425404T patent/ATE552908T1/en active
- 2008-06-06 ES ES08425404T patent/ES2385878T3/en active Active
- 2008-06-06 EP EP08425404A patent/EP2130607B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
ATE552908T1 (en) | 2012-04-15 |
EP2130607A1 (en) | 2009-12-09 |
ES2385878T3 (en) | 2012-08-02 |
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