WO2023016793A1 - Zentrifuge sowie verfahren zum betrieb dieser zentrifuge - Google Patents
Zentrifuge sowie verfahren zum betrieb dieser zentrifuge Download PDFInfo
- Publication number
- WO2023016793A1 WO2023016793A1 PCT/EP2022/070874 EP2022070874W WO2023016793A1 WO 2023016793 A1 WO2023016793 A1 WO 2023016793A1 EP 2022070874 W EP2022070874 W EP 2022070874W WO 2023016793 A1 WO2023016793 A1 WO 2023016793A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- centrifuge
- drum
- chamber
- barrier
- annular space
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 27
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 239000000725 suspension Substances 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 230000004888 barrier function Effects 0.000 claims description 114
- 239000007789 gas Substances 0.000 claims description 64
- 230000000903 blocking effect Effects 0.000 claims description 35
- 238000012545 processing Methods 0.000 claims description 6
- 235000013361 beverage Nutrition 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000825 pharmaceutical preparation Substances 0.000 claims description 4
- 229940127557 pharmaceutical product Drugs 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000009969 flowable effect Effects 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 28
- 239000001301 oxygen Substances 0.000 description 28
- 229910052760 oxygen Inorganic materials 0.000 description 28
- 239000003570 air Substances 0.000 description 13
- 239000007791 liquid phase Substances 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 239000007790 solid phase Substances 0.000 description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 description 2
- 229930003268 Vitamin C Natural products 0.000 description 2
- 235000020971 citrus fruits Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 235000020006 fruit beer Nutrition 0.000 description 2
- 235000015203 fruit juice Nutrition 0.000 description 2
- 235000012055 fruits and vegetables Nutrition 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229930014626 natural product Natural products 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000019154 vitamin C Nutrition 0.000 description 2
- 239000011718 vitamin C Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
- B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
-
- 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
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
- B04B11/082—Skimmers for discharging liquid
Definitions
- the present invention relates to a centrifuge according to the preamble of claim 1 and to a method for operating this centrifuge according to claim 13.
- Centrifuges - especially separators - that process products that change their product properties when they come into contact with oxygen must be sealed against an oxygen-containing atmosphere.
- the seal also allows the gases dissolved in the product to be kept completely in the product, as is desirable, for example, in the case of centrifugal clarification of beer.
- one or more liquid phases are often drawn off through an outlet in which a so-called stationary gripper is arranged.
- the gripper - also called the impeller - works according to the principle of a centripetal pump.
- a centrifuge for separating or clarifying a free-flowing product or a free-flowing suspension into at least two phases in a centrifugal field in continuous operation, the centrifuge having a drum which is rotatably mounted by means of a drive motor and has a metal drum shell with a vertical axis of rotation, the The drum also has an inlet pipe and at least one gripper chamber with a gripper for discharging clarified or separated liquid and preferably a solids discharge and wherein the drum above the gripper chamber has at least two blocking chambers lying axially one above the other, each with a blocking disk protruding into the respective blocking chamber and wherein at least one supply channel for supplying a blocking medium into one of the blocking chambers or at least one supply channel for supplying a blocking medium into the respective blocking chamber is provided.
- the centrifuge according to the invention is more robust than a centrifuge with a fully hermetic design, since there are no mechanical seals that are susceptible to wear.
- a line is provided in particular for feeding a gas into an annular space around an annular partition wall extending radially inward from the drum shell between the two blocking chambers or for evacuating a gas from the annular space.
- a discharge line for discharging gas from the annular space is provided.
- a barrier gas that is heavier than air is preferably introduced into an annular space between the two barrier disks.
- the sealing gas which is preferably heavier than air, is then in the annular space between the two locking disks.
- a centrifuge according to the invention is particularly preferably suitable for all centrifugal processing in which it is advantageous to exclude oxygen as far as possible in order to avoid undesirable oxidation processes.
- the first locking chamber is delimited radially below by a lower annular wall of a gripper chamber, in which a gripper is inserted.
- a wall of the gripper chamber can also be used as a wall for the locking chamber in a space-saving manner.
- the first barrier chamber is delimited from the second barrier chamber by an intermediate wall. This results in a space-saving arrangement of the second locking chamber radially above the first locking chamber.
- the centrifuge has at least one feed channel for feeding a barrier liquid into the respective barrier chamber.
- each barrier chamber can be filled separately from the other if there are two channels. This makes it possible to fill one or both barrier chambers without pressure or with counter-pressure.
- the sealing chamber(s) can be filled with sealing liquid flexibly in accordance with the current requirements for hermetic sealing.
- a radius RMI at the mouth of the respective feed channel in the blocking chamber is smaller than the radius RAZ of an outer edge of the intermediate wall. This results in a constructively simple and easy-to-manufacture ability to fill the barrier chambers with barrier liquid without pressure, since it is only dependent on the geometry.
- a radius RM2 at the mouth of the respective feed channel in the respective blocking chamber is larger than the radius RAZ of the outer edge of the intermediate wall. This results in a structurally simple and easy-to-manufacture fillability of the barrier chambers with barrier liquid with a counter-pressure, since it is only dependent on the geometry.
- the sealing gas flows through a line into the space between the two sealing chambers and flows out of the space through an outlet for the sealing gas. This results in a constructively simple replacement of the sealing gas.
- a gas sensor in particular a CO 2 sensor
- the present invention also solves the problem with a method for operating the centrifuge according to the invention.
- the process is characterized in that the space between the two sealing chambers is continuously flushed with an inert sealing gas during operation of the centrifuge, so that any air or possible oxygen that may have escaped from the space under the hood through the sealing liquid in the second barrier chamber has penetrated, is flushed out.
- the centrifuge according to the invention is more robust than a centrifuge with a fully hermetic design, since there are no mechanical seals that are susceptible to wear.
- the sealing gas requirement is significantly lower compared to inerting the entire centrifuge or inerting a space above the sealing chambers.
- the power required to drive the centrifuge is also reduced, since the entire rotor no longer rotates in an inert gas atmosphere, the density of which is greater than that of air.
- the risk of CO2 escaping, contaminating the space outside the centrifuge is also reduced.
- Another area of application are oxygen-sensitive reactions, which can occur, for example, in chemical synthesis, for example of pharmaceutical products.
- the application involves a variety of reactions under protective gas.
- argon can also be used here instead of CO2 due to its chemical inertness.
- the invention also creates advantageous methods for operating the centrifuges according to the invention, in particular separators.
- This method is simple and in this way leads to an advantageous filling of both barrier chambers with the barrier liquid.
- Steps ii) and iii) can be carried out here, as well as in the other variants, one after the other, but they can also be carried out simultaneously.
- more than two locking chambers can also be provided, which lie directly axially one above the other.
- claim 14 is a method for operating a centrifuge according to one of claims 1 to 12, which has the following steps: i) providing the centrifuge and rotating the drum, ii) supplying a suspension to be processed and separating the suspension into at least two phases, iii) Filling the two barrier chambers with an inlet pressure until the two barrier discs are each immersed in the barrier liquid.
- This method is also simple and in this way leads to an advantageous filling of both barrier chambers with the barrier liquid.
- Steps ii) and iii) can be carried out here, as well as in the other variants, one after the other, but they can also be carried out simultaneously.
- more than two locking chambers can also be provided, which lie directly axially one above the other.
- the invention also provides the use of a centrifuge according to any one of claims 1 to 12 in beverage processing and/or in the chemical synthesis of a compound, in particular a pharmaceutical product.
- FIG. 1 a schematic illustration in full section of a centrifuge designed as a separator
- FIG. 2 a detailed view of the head area of the drum of the centrifuge according to a first constructional embodiment with two blocking chambers, in which the blocking chambers are filled according to a first alternative procedure;
- FIG. 3 a detailed representation of the head area of the drum of the centrifuge according to the first structural embodiment with two blocking chambers, in which the blocking chambers are filled according to a second alternative procedure;
- FIGS. 4 to 6 each show a detailed view of the head area of the drum of the centrifuge according to various structural configurations, in which the sealing chambers are filled using an alternative procedure.
- centrifuge 1 configured as a separator for separating or clarifying a free-flowing product or a free-flowing suspension P into at least two phases L, S in a centrifugal field.
- the centrifuge 1 has a rotating system with a drum 2 arranged rotatably on or on a rotatable spindle 30 .
- the spindle 30 is preferably oriented vertically and can be driven directly or indirectly - e.g. via a drive belt - are driven.
- the drive is preferably implemented by a drive motor, in particular an electric motor, of the centrifuge (not shown).
- the drum 2, in particular the drum shell, can be made from a wide variety of materials.
- the drum 2 or the drum shell is made of metal.
- the drum 2 can have a vertical axis of rotation 3 .
- the drum 2 can be designed for continuous operation.
- the drum 2 can essentially be single or double conical.
- the drum 2 initially has an inlet.
- This can have a centrally arranged feed pipe 4 which is stationary during operation of the centrifuge 1 and through which a product P can be fed into a distributor 23 of the drum 2 and from there into the separating space 26 .
- the feed pipe 4 forms part of an operationally non-rotating shaft assembly 41 which extends axially into the drum 2 from outside the drum but does not rotate therewith in use.
- the shaft assembly 41 and the drum 2 are therefore radially spaced from each other.
- the inlet can also be designed in a different way. That's how it can be Feed pipe 4 can be designed to rotate and/or be provided at the lower end of drum 2 (not shown).
- the product P to be processed which is fed into the drum 2 through the feed pipe 4, emerges from the end of the feed pipe 4 and flows through a distributor 23 rotating with the drum 1 and then enters the separation chamber 26 proper. There it is separated into at least two phases--here a liquid phase L and a solid phase S.
- the starting product is clarified, i.e. the solid phase S is separated from the product P to be processed.
- the product P to be processed enters a stack of separating discs 27 in the separating space 26 .
- the piston valve 22 is shown schematically in the closed position, in which it closes the discharge nozzles 20, and in the right-hand part in a position in which the discharge nozzles 20 are open.
- the drum 2 then has a solids discharge.
- This can have a piston valve 22 and a plurality of discharge openings 20 which are provided as a discontinuous outlet for the solid phase S.
- the drum 2 has at least one gripper chamber 5 which rotates with the drum 2 during operation of the centrifuge 1 and in which a gripper 8 which is stationary during the operation of the centrifuge 1 - also known in technical terms as the impeller - is inserted.
- the gripper 8 works on the principle of a centripetal pump. Accordingly, one liquid phase L is discharged from the drum 2 through the discharge pipe 82 through one or more discharge channels 81 within the gripper 8 . Two grippers 8 and gripper chambers 5 arranged axially one above the other could also be provided in order to discharge two liquid phases. Then the drum 2 would preferably be designed for a separation into two liquid phases and a solid phase (not shown).
- first locking chamber 7 which runs around with the drum 2 . This serves to form a first hydrohermetic seal.
- a first locking disk 9 is arranged in the first locking chamber 7 rotating with the drum 2 during operation of the centrifuge 1 . It extends perpendicular to the axis of rotation 3 radially outwards into the locking chamber 7.
- the first locking chamber 7 is formed perpendicularly to the axis of rotation 3 .
- the drum head 29 can be of entirely cylindrical design or have an upper section in which the outer drum wall or the drum casing is of essentially cylindrical design.
- a second locking chamber 12 is arranged axially above the first locking chamber 7 .
- a second locking disk 14 is inserted into the second locking chamber 12, which is also firmly connected to the shaft arrangement 41 and thus also does not rotate when the centrifuge 1 is in operation.
- This locking disk 14 also extends radially from the inside to the outside. They are formed perpendicularly to the axis of rotation 3 .
- the two locking chambers 7, 12 are each axially delimited by annular walls 16, 17, 18 which, starting from the inner circumference of the drum shell of the drum head 29, extend radially inwards perpendicularly to the axis of rotation 3. They are formed at a radial distance from the inner, non-rotating shaft arrangement 41 or shaft assembly with the inlet pipe 4 and the at least one axial gripper channel 81 from the paring disk or the gripper 8 of the drum 2 .
- the locking chambers 7, 12 are each delimited radially outwards by the drum shell.
- the barrier chambers 7, 12 can be charged with a liquid barrier medium 32--particularly water or the product P itself to be processed.
- a liquid ring/cylinder then forms radially on the outside in the respective blocking chamber 7 , 12 . This is dimensioned in such a way that the blocking disks 9, 14 dip radially into the blocking medium 32 when the centrifuge 1 is in operation, so that a double hydrohermetic seal is formed.
- At least one inlet channel 11 can be provided for this purpose, or several inlet channels 11, 1T can be provided.
- the respective feed channel 1 1, 1 T preferably extends from a location outside of the drum 2 through the shaft arrangement 41 into the respective barrier chamber 7 and/or 12.
- the barrier medium 32 can, for example, flow from a reservoir 31 located outside the centrifuge into the feed channels 1 1 , 1 T flow.
- only one feed channel 11 can extend into the lower locking chamber 7 (FIGS. 2 or 3). However, it can also be provided that a feed channel 11, 1T extends into each of the locking chambers 7, 12 (FIGS. 4, 5 or 6).
- the liquid barrier medium 32 is directed into the barrier chambers 7, 12 during operation, which as a result of the rotation of the Drum centrifugal forces occurring collects outside in the two locking chambers 7 and 12 and there each forms a liquid ring.
- water or the product to be processed can be used as the barrier medium 32 .
- Other blocking media are also conceivable.
- the first locking chamber 7 is delimited radially downwards by a lower annular wall 16 from the gripper chamber 5, in which the gripper 8 is inserted. Furthermore, the first barrier chamber 7 is delimited from the second barrier chamber 12 by an intermediate annular wall 17 .
- the second barrier chamber 12 has radially at the top an annular wall 18 delimiting the upper side, which has an overflow edge 15 radially on the inside, at which liquid can escape from the rotating system into the hood space 21 .
- FIG. 2 shows a detailed representation of the drum head 29 of the drum 2 of the centrifuge 1 according to a first structural configuration, in which sealing liquid is supplied according to a first alternative.
- a feed channel 11 extends from an area outside the drum 2 through the axially running and non-rotating inner shaft arrangement 41 into the area of the lower locking chamber 7.
- the feed channel 11 ends here axially above the lower locking disk 9 in the first lower locking chamber 7. He has a radially aligned outlet opening here. This is radially further inwards than the outer edge of the first locking disk 9.
- the second upper blocking chamber 12 does not have its own feed channel or, if present, it is not used.
- the filling of the upper barrier chamber 12 with the barrier medium 32 with the lower locking chamber 7 made, namely made with a feed channel which opens into the lower locking chamber 7.
- a control unit is provided for controlling the operation of the separator. This can also be used to control or regulate the filling of the locking chambers 7, 12 during operation.
- a centrifuge 1 - in particular according to FIG. 1 with the drum head 29 - in particular according to the type of FIG. 2 - is provided. Then the drum 2 is rotated by a drive (not shown here).
- the first, lower, first barrier chamber 7 is then filled with barrier liquid via the feed channel 11 .
- the outlet opening emerges from the supply channel 11 for supplying the sealing liquid - here due to the selected arrangement of Fig.
- the second upper locking chamber 12 fills up because the lower annular wall 16 between the first locking chamber 7 and the gripper chamber 5 extends further radially inward than the intermediate annular wall 17 between the two locking chambers 7, 12. If the upper second barrier chamber 12 overflows, the barrier liquid reaches the hood space within the hood 21 via the overflow edge 15 .
- the upper barrier chamber 12 can also be filled, which then overflows into the lower barrier chamber 7 . Then the feed channel 1 T opens into the upper blocking chamber 12.
- Both locking chambers 7, 12 can each have an inlet channel 11.
- the one feed channel in each case is not used for filling according to one of the two methods described above.
- FIG. 3 shows a detailed representation of the drum head 29 of the drum 2 of the centrifuge 1 according to the first structural embodiment of FIG. 2, in which a supply of sealing liquid takes place according to a second procedural alternative.
- the first barrier chamber 7 is in turn filled with barrier liquid through the feed channel 11.
- the supply channel 1 1 for supplying the barrier liquid is immersed in the barrier liquid in the first barrier chamber 7 and is added with a required inlet pressure.
- the filling level of the barrier liquid can be adjusted via the inlet pressure.
- the second barrier chamber 12 fills up. If the second barrier chamber 12 overflows, the barrier liquid gets into the hood space.
- the product P and/or the discharged liquid phase L can absorb very little oxygen if some oxygen diffuses through the barrier liquid.
- FIG. 4 shows a detailed representation of the drum head 29 of the drum 2 of the centrifuge 1 according to a second embodiment, in which sealing liquid is supplied according to the first alternative.
- the drum 2 can be constructed, for example, in the manner of FIG.
- the arrangement of the locking chambers and their annular walls 16, 17, 18 can be configured in the manner of FIG. 2 or FIG.
- the two barrier chambers 7, 12 are filled completely separately with barrier liquid.
- a separate feed channel 1 1, 1 T opens.
- barrier liquid from an area outside the drum 2 through the respective feed channel 1 1, 1 T separately in the respective barrier chamber 7, 12 can be routed.
- a centrifuge in particular according to FIG. 1 with the drum head 29 in the manner of FIG. 2—is provided. Then the drum 2 is rotated by a drive (not shown here).
- barrier liquid in the two barrier chambers 7, 12 passed, such that the channels 1 1, 1 T radially and overall not immersed in the barrier liquid in the respective barrier chamber 7, 12. According to this alternative, the barrier liquid is added without counter-pressure.
- the exit of the feed channel 11' into the upper blocking chamber 12 is preferably above the (axially upper) blocking disk 14 in this upper blocking chamber 12.
- the exit of the feed channel 11 into the lower blocking chamber 7 is preferably above the (axially lower) blocking disk 9 in the lower blocking chamber 12.
- the volume of the sealing liquid is preferably dosed by the control device in such a way that the sealing liquid does not overflow into the hood space.
- a further annular space 19 can be formed between the two locking disks 9 , 14 , with suitable control and application, so to speak around the intermediate annular wall 17 .
- This line 24 can also extend through or run with the non-rotating shaft assembly 41 .
- a further annular space 19 can be formed between the two locking disks 9 , 14 , with suitable control and application, so to speak around the intermediate annular wall 17 .
- This annular space 19 forms a U-shape in section around the free end of the intermediate annular wall 17.
- the annular space 19 is continuously flushed with an inert sealing gas 13 during operation of the centrifuge 1, so that any air or possible oxygen that may have penetrated from the space under the hood 21 through the sealing liquid in the second sealing chamber 12 is flushed out can.
- Sealing gas 13 which leaves annular space 19 , can escape outside hood 21 .
- the sealing gas 13 is held in the annular space 19 by the two locking disks 9 , 14 .
- the pressure in the annular space 19 can be set relatively freely by the control device; both overpressure and underpressure are possible.
- sealing gas 13 it is also possible for sealing gas 13 to act solely on the annular space 19 . In that case, the two barrier chambers 7, 12 are not filled with barrier liquid.
- the inert sealing gas 13 is preferably CO2.
- the sealing gas 13 can (not shown here) from a gas reservoir via line 24 in the Annulus 19 flows. Furthermore, an outlet 25 for the sealing gas 13 from the annular space 19 can be provided.
- CO2 Since CO2 is heavier than air or oxygen, it is thrown outwards in the rotating annular space 19 when the centrifuge 1 is in operation. As a result, air that has penetrated into the annular space 19 or oxygen that has penetrated is displaced from the annular space 19 . This creates an effective barrier against further penetration of air and thus also oxygen into drum 2.
- the sealing gas 13 can be fed into the annular space 19 by an actuator (not shown here), e.g. a valve, which can be controlled via the control unit, so that the gas feed to the annular space 19 can be regulated.
- an actuator e.g. a valve, which can be controlled via the control unit, so that the gas feed to the annular space 19 can be regulated.
- FIG 5 shows a detailed illustration of the drum head 29 of the drum 2 of the centrifuge 1 according to the second embodiment, in which the sealing liquid is also supplied according to the first alternative.
- the two barrier chambers 7, 12 are filled separately with barrier liquid.
- the channels 11, 1T do not dip into the barrier liquid in the respective barrier chamber 7, 12 and the barrier liquid is added without counter-pressure.
- the volume of the barrier liquid is dosed by the control device in such a way that the barrier liquid does not overflow a space under the hood 21 .
- the annular space 19 between the two locking discs 9, 14 is continuously flushed with an inert sealing gas 13 during operation of the centrifuge 1, so that any air or possible oxygen that may have escaped from the space under the hood 21 through the sealing liquid in the second Locking chamber 12 has penetrated, can be flushed out.
- Sealing gas 13 which leaves annular space 19 , can escape here inside hood 21 .
- the sealing gas 13 is held in the annular space 19 by the two locking disks 9 , 14 .
- the pressure in the annular space 19 can be set relatively freely by the control device; both overpressure and underpressure are possible.
- 6 shows a detailed representation of the drum head 29 of the drum 2 of the centrifuge 1 according to the second embodiment, in which sealing liquid is supplied according to the second alternative.
- the two barrier chambers 7, 12 are filled separately with barrier liquid.
- the channels 11, 1 T are immersed in the barrier liquid in the respective barrier chamber 7,
- the volume of the barrier liquid is dosed by the control device in such a way that the barrier liquid does not overflow a space under the hood 21 .
- the annular space 19 between the two locking discs 9, 14 is continuously flushed with an inert sealing gas 13 during operation of the centrifuge 1, so that any air or possible oxygen that may have escaped from the space under the hood 21 through the sealing liquid in the second Locking chamber 12 has penetrated, can be flushed out.
- Sealing gas 13 which leaves annular space 19 , can escape inside or outside hood 21 .
- the pressure in the annular space 19 can be set relatively freely by the control device; both overpressure and underpressure are possible.
- a mixing of the sealing gas 13 with the product flow in the gripper chamber 5 below the first sealing chamber 7 does not take place or hardly takes place. If it does, this will not have a negative impact on the product, as CO2 is typically also used in the beverage industry.
- CO2 is typically also used in the beverage industry.
- other gases that are heavier than air can also be used so that air, and thus also the oxygen in the air, is displaced.
- this is also an inert gas such as argon.
- the supply 24 of the sealing gas 13 can take place during operation of the drum 2 as a function of the rotational speed or speed, or alternatively can be detected.
- a gas sensor in particular a CO2 sensor, can also be provided on the line 24 and/or on the outlet 25 of the sealing gas 13, so that a type "Level control" can be done by the control unit, which controls the actuator accordingly.
- Empirical values can also be used, which are available, for example, in the form of a data set in the data memory of the control unit. With an increased rotational speed, more sealing gas 13 can accordingly be supplied. It is also possible to equip only a prototype of a centrifuge 1 according to the invention with the sensors in order to determine the necessary feed quantity at a corresponding speed. This can then be stored in a data memory of series products as a data record for the appropriate measurement of the inflow quantity of sealing gas 13 as a function of the speed.
- the centrifuge 1 according to the invention is more robust than a centrifuge with a fully hermetic design, since there are no mechanical seals that are susceptible to wear.
- the requirement for barrier gas 13 is significantly lower than when the entire centrifuge is rendered inert or when a space above barrier chambers 7, 12 is rendered inert.
- the power requirement for driving the centrifuge 1 also falls, since the entire rotor no longer rotates in an inert gas atmosphere. The risk of CO2 escaping, which would contaminate the space outside the centrifuge 1, is also reduced.
- a separator according to the invention or a centrifuge 1 according to the invention is preferably suitable for all processing in which the exclusion of oxygen is advantageous in order to avoid undesired oxidation processes.
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- Centrifugal Separators (AREA)
- Preparation Of Fruits And Vegetables (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2022327488A AU2022327488A1 (en) | 2021-08-09 | 2022-07-26 | Centrifuge, and method for operating said centrifuge |
KR1020247002699A KR20240037251A (ko) | 2021-08-09 | 2022-07-26 | 원심분리기 및 상기 원심분리기의 작동 방법 |
CN202280055671.0A CN117858766A (zh) | 2021-08-09 | 2022-07-26 | 离心机以及用于运行该离心机的方法 |
JP2024501740A JP2024530113A (ja) | 2021-08-09 | 2022-07-26 | 遠心分離機及び該遠心分離機を操作する方法 |
MX2024001578A MX2024001578A (es) | 2021-08-09 | 2022-07-26 | Centrifuga y metodo para operar la centrifuga. |
EP22754873.2A EP4384323A1 (de) | 2021-08-09 | 2022-07-26 | Zentrifuge sowie verfahren zum betrieb dieser zentrifuge |
US18/682,173 US20240326068A1 (en) | 2021-08-09 | 2022-07-26 | Centrifuge and method for operating said centrifuge |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102021120611.1A DE102021120611A1 (de) | 2021-08-09 | 2021-08-09 | Zentrifuge sowie Verfahren zum Betrieb dieser Zentrifuge |
DE102021120611.1 | 2021-08-09 |
Publications (1)
Publication Number | Publication Date |
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WO2023016793A1 true WO2023016793A1 (de) | 2023-02-16 |
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PCT/EP2022/070874 WO2023016793A1 (de) | 2021-08-09 | 2022-07-26 | Zentrifuge sowie verfahren zum betrieb dieser zentrifuge |
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US (1) | US20240326068A1 (de) |
EP (1) | EP4384323A1 (de) |
JP (1) | JP2024530113A (de) |
KR (1) | KR20240037251A (de) |
CN (1) | CN117858766A (de) |
AU (1) | AU2022327488A1 (de) |
DE (1) | DE102021120611A1 (de) |
MX (1) | MX2024001578A (de) |
WO (1) | WO2023016793A1 (de) |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102023124317A1 (de) * | 2023-09-08 | 2025-03-13 | Gea Westfalia Separator Group Gmbh | Verfahren und Separator zur Aufkonzentration einer Algen-Biomasse |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE657473C (de) * | 1936-08-25 | 1938-03-05 | Bergedorfer Eisenwerk Ag | Schaelschleudermaschine |
GB616405A (en) * | 1945-09-15 | 1949-01-20 | Separator Ab | Improvements in centrifugal separator |
US3126338A (en) | 1959-11-30 | 1964-03-24 | Hermetically sealable mounting means | |
DE19631226A1 (de) | 1996-08-02 | 1998-02-05 | Westfalia Separator Ag | Zentrifuge, deren Schleudertrommel eine Schälkammer und eine Hydrohermetikkammer aufweist |
WO2005014772A1 (de) * | 2003-07-30 | 2005-02-17 | Westfalia Separator Ag | Verfahren und vorrichtung zur einstellung des trubgehaltes eines getränks |
EP3865218A1 (de) * | 2020-02-11 | 2021-08-18 | GEA Mechanical Equipment GmbH | Verfahren zum betrieb einer zentrifuge und eine anordnung umfassend eine zentrifuge und ein gasreservoir |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19951270C1 (de) | 1999-10-25 | 2001-03-15 | Krupp Uhde Gmbh | Verfahren und Vorrichtung zur Beatmung von Tankanlagen |
DE102017103065B4 (de) | 2017-02-15 | 2021-01-21 | Flottweg Se | Auslasseinrichtung eines Separators |
-
2021
- 2021-08-09 DE DE102021120611.1A patent/DE102021120611A1/de active Pending
-
2022
- 2022-07-26 EP EP22754873.2A patent/EP4384323A1/de active Pending
- 2022-07-26 US US18/682,173 patent/US20240326068A1/en active Pending
- 2022-07-26 AU AU2022327488A patent/AU2022327488A1/en active Pending
- 2022-07-26 KR KR1020247002699A patent/KR20240037251A/ko active Pending
- 2022-07-26 JP JP2024501740A patent/JP2024530113A/ja active Pending
- 2022-07-26 WO PCT/EP2022/070874 patent/WO2023016793A1/de active Application Filing
- 2022-07-26 MX MX2024001578A patent/MX2024001578A/es unknown
- 2022-07-26 CN CN202280055671.0A patent/CN117858766A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE657473C (de) * | 1936-08-25 | 1938-03-05 | Bergedorfer Eisenwerk Ag | Schaelschleudermaschine |
GB616405A (en) * | 1945-09-15 | 1949-01-20 | Separator Ab | Improvements in centrifugal separator |
US3126338A (en) | 1959-11-30 | 1964-03-24 | Hermetically sealable mounting means | |
DE19631226A1 (de) | 1996-08-02 | 1998-02-05 | Westfalia Separator Ag | Zentrifuge, deren Schleudertrommel eine Schälkammer und eine Hydrohermetikkammer aufweist |
WO2005014772A1 (de) * | 2003-07-30 | 2005-02-17 | Westfalia Separator Ag | Verfahren und vorrichtung zur einstellung des trubgehaltes eines getränks |
EP3865218A1 (de) * | 2020-02-11 | 2021-08-18 | GEA Mechanical Equipment GmbH | Verfahren zum betrieb einer zentrifuge und eine anordnung umfassend eine zentrifuge und ein gasreservoir |
Also Published As
Publication number | Publication date |
---|---|
KR20240037251A (ko) | 2024-03-21 |
MX2024001578A (es) | 2024-02-15 |
DE102021120611A1 (de) | 2023-02-09 |
EP4384323A1 (de) | 2024-06-19 |
CN117858766A (zh) | 2024-04-09 |
AU2022327488A1 (en) | 2024-01-25 |
US20240326068A1 (en) | 2024-10-03 |
JP2024530113A (ja) | 2024-08-16 |
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