EP3085452B1 - Centrifugeuse discontinue doté d'un dispositif de commande destiné à commander le fonctionnement de la centrifugeuse et procédé de fonctionnement de la centrifugeuse - Google Patents

Centrifugeuse discontinue doté d'un dispositif de commande destiné à commander le fonctionnement de la centrifugeuse et procédé de fonctionnement de la centrifugeuse Download PDF

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Publication number
EP3085452B1
EP3085452B1 EP15164466.3A EP15164466A EP3085452B1 EP 3085452 B1 EP3085452 B1 EP 3085452B1 EP 15164466 A EP15164466 A EP 15164466A EP 3085452 B1 EP3085452 B1 EP 3085452B1
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EP
European Patent Office
Prior art keywords
centrifuge
operating point
quotient
centrifuge drum
acceleration
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EP15164466.3A
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German (de)
English (en)
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EP3085452A1 (fr
Inventor
Michael Thelen
Viktor Janssen
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BWS Technologie GmbH
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BWS Technologie GmbH
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Priority to PL15164466T priority Critical patent/PL3085452T3/pl
Priority to EP15164466.3A priority patent/EP3085452B1/fr
Priority to DK15164466.3T priority patent/DK3085452T3/en
Priority to PCT/EP2016/058885 priority patent/WO2016170047A1/fr
Publication of EP3085452A1 publication Critical patent/EP3085452A1/fr
Application granted granted Critical
Publication of EP3085452B1 publication Critical patent/EP3085452B1/fr
Priority to HRP20171293TT priority patent/HRP20171293T1/hr
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    • 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
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • B04B11/043—Load indication with or without control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/12—Other accessories for centrifuges for drying or washing the separated solid particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/10—Control of the drive; Speed regulating

Definitions

  • the invention relates to a discontinuous centrifuge with a control device for controlling the operation of the centrifuge and a method for operating the centrifuge.
  • a discontinuous centrifuge is known for solid-liquid separation of crystal suspensions in the production of food.
  • the discontinuous centrifuge has a centrifuge drum which is filled at the beginning of each operation with the crystal suspension as a product, the centrifuge rotating at a speed of 100 to 250 revolutions per minute. After completing the filling of the centrifuge drum, which then contains a predetermined amount of the contents, the centrifuge drum is accelerated to a speed in the range of 980 to 1500 revolutions per minute. This speed is maintained until a desired separation and drying progress is achieved in the medium.
  • the centrifuge drum is decelerated again and with a clearing device, the contents are removed from the centrifuge drum.
  • the operation is completed and a new batch of crystal suspension is filled in the centrifuge drum in a subsequent step, hurled and cleared.
  • the crystal suspension is a mixture of crystals and syrup.
  • the syrup surrounds the crystals and is centrifuged off the contents, with the centrifuged syrup is obtained as a green effluent.
  • a suitable washing fluid for example syrup, water or steam.
  • the washing is carried out by means of a constant washing liquid flow, which is sprayed onto the free surface of the filling material for a predetermined period of time.
  • the amount of washing fluid supplied thereby to the centrifuge drum is constant for each batch and dissolves the same amount of crystals at the same crystal structure per operation.
  • the dissolved crystals accumulate as white effluent and are re-crystallized using energy in a subsequent step.
  • the adjustment of the washing time and the amount of washing fluid for each batch is either conventional manually by operators of the batch centrifuge based on experience or just automatically in the presence of a washing control device.
  • a non-optimal addition of the wash fluid to the centrifuge is accompanied by sacrifices in product quality and product yield. In the worst case, even unstable operating conditions of the centrifuge can occur.
  • a centrifuge according to the preamble of claim 1 is known from EP 2 275 207 A1 .
  • the object of the invention is to provide a discontinuous centrifuge with a control device for controlling the operation of the centrifuge and a method for operating the centrifuge, wherein the centrifuge is safe and effective operable.
  • the discontinuous centrifuge according to the invention for the solid-liquid separation of a crystal suspension has a centrifuge drum, into which the crystal suspension can be filled as a filling material in a predetermined amount and which, with a drive unit at least in a first acceleration phase and in a second after the first acceleration phase Acceleration phase is rotatably drivable, a Waschfluidzugabetician with a control valve via which a washing fluid in the centrifuge drum for washing the medium is zugebbar, a detection unit, with a lying in the first acceleration phase, temporally forward operating point, a first quotient of the instantaneous torque and the current Spin acceleration of the centrifuge drum and with the lying in a second acceleration phase, time-lagging operating point, a second quotient of the instantaneous torque and the instantaneous rotational acceleration of the Z Entr entr tiger drum are detected in real time, and a control device, with the control valve in a throttle position, preferably the delivery, set as soon as the
  • the product is accelerated only once, with the two acceleration phases next to each other and the two operating points in chronological succession.
  • the two acceleration phases may, but not necessarily, be interrupted by an acceleration pause. It is possible to accelerate between the two acceleration phases or the two acceleration phases adjoin one another directly in time.
  • the method according to the invention for controlling the operation of the centrifuge according to the invention comprises the steps of: providing the centrifuge with the centrifuge drum filled with the contents; Spinning the centrifuge drum having the first acceleration phase and the second acceleration phase; At the time-forward operating point in the first acceleration phase, the quotient of the instantaneous torque and the instantaneous rotational acceleration of the centrifuge drum and, at the second acceleration phase, the rearward operating point, detect the second quotient of the instantaneous torque and the instantaneous rotational acceleration of the centrifuge drum real time; Driving the control valve that the control valve is set to the throttle position, preferably the delivery, as soon as the ratio of the first quotient to the second quotient is smaller than the predetermined limit at the rear operating point, so that the addition of the washing fluid in the centrifuge drum is reducible, preferably can be suppressed.
  • the addition of the washing fluid to the centrifuge drum during operation of the centrifuge has a significant impact on their operation in terms of product yield, product quality and operational safety.
  • the invention is based on the finding that the operation of the centrifuge is improved only with regard to product quality, product yield and operational safety if the addition of the washing fluid takes place when the permeability of the filling material for the washing fluid has reached a correspondingly high degree. Only after the contents of the washing fluid is sufficiently permeable, a conducive to the operation of the centrifuge mass flow of the washing fluid through the filling material can be achieved. This is advantageously achieved that not unduly high levels of the washing fluid in the centrifuge accumulate and lead to any instabilities in the operation of the centrifuge. Furthermore, the contents are sufficiently perfused during centrifugation with the washing fluid, whereby syrup residues on the crystal surfaces are easy to transport away.
  • fluid is driven through the contents during centrifugation, which may be either the syrup of the crystal suspension or the washing fluid or both.
  • the liquid discharge from the filling material is accompanied by a mass change of the filling material, whereby the centrifuge drum undergoes a corresponding change in its mass moment of inertia with its contents.
  • the change of the mass moment of inertia of the centrifuge drum with the filling material is used in order to close the permeability of the filling material. Only with sufficiently high penetrability of the filling material, namely if, at the rear operating point, the ratio of the two quotients is greater than the predetermined limit, the washing fluid can be ideally added to the centrifuge drum.
  • control valve sets the control valve into the throttle position by means of the control unit, so that the addition of the washing fluid into the centrifuge drum is at least reduced or even prevented.
  • washing fluid may already have been supplied into the centrifuge drum or not before the rear operating point.
  • the limit is 1.2. Furthermore, it is preferred that the drive unit can be controlled by the control unit such that, as soon as the ratio of the first quotient to the second quotient is smaller than the predefined limit value, the rotational speed is at a predetermined limiting rotational speed which is lower than the rotational speed to the rear operating point , is reduced. Especially Preferably, the limit speed is zero, that is, the centrifuge is stopped when no separation or insufficient separation has occurred. In the event that the permeability of the contents is not sufficiently present during operation of the centrifuge to the rear operating point, the rotational speed of the centrifuge drum is reduced or the centrifuge drum is stopped, so that any instabilities are prevented by an excessive amount of liquid in the centrifuge drum. As a result, the operation of the centrifuge according to the invention is safe.
  • the washing fluid adding unit is preferably a washing water adding unit for supplying a washing water into the centrifuge drum as the washing fluid. It is preferred that during the acceleration phases, the speed is increased linearly over time. Furthermore, there is preferably an intermediate spin phase between the first acceleration phase and the second acceleration phase during which the rotational speed is kept constant over time. Preferably, the front operating point falls shortly before the end of the first acceleration phase and the rear operating point shortly after the start of the second acceleration phase.
  • the front operating point coincides with the beginning of the intermediate spin phase and the rear operating point coincide with the end of the intermediate spin phase.
  • the washing fluid is supplied into the centrifuge drum when the driving of the control valve fails to set the control valve to the throttle position.
  • washing fluid is supplied to the centrifuge drum at or before the forward operating point.
  • the torque is preferably determined by means of the effective torque of the frequency converter or DC converter.
  • the ratio of the two quotients is used to quantify the separation behavior of the contents during the acceleration phases of the centrifuge. All data necessary for this purpose are preferably measured in the frequency converter or DC converter, whereby, for example, no additional measuring devices for determining the torque and the rotational acceleration in the centrifuge according to the invention are to be provided. Based on the size of the ratio of the two quotients can be derived whether the rear operating point, a separation in the filling takes place or has already taken place. In addition, it is possible, based on the size of the ratio of the two quotients, to dose the amount of the washing fluid to be supplied in such a way that the highest possible washing progress is achieved with the highest possible operational reliability of the centrifuge.
  • washing fluid is introduced into the centrifuge drum, for example if the separation behavior of the medium is too weak or too weak or too early, then uncontrolled waves can form in the drum.
  • the waves cause unbalance of the centrifuge drum, which can damage it. It is advantageously possible to suspend the addition of the washing fluid by delaying the ratio of the quotients or delaying or completely stopping it according to the delayed onset of separation.
  • a centrifuge 1 has a centrifuge drum 2.
  • the centrifuge drum 2 has an axis of rotation 3, which coincides with the axis of symmetry of the centrifuge drum 2 and in FIG. 1 is arranged vertically.
  • the centrifuge drum 2 further comprises a spindle 4, which serves for rotational driving of the centrifuge drum 2 and is fixedly connected to a hub 5.
  • a distributor 6 is arranged in the form of a cone 4 projecting radially outwardly from the spindle.
  • the centrifuge drum 2 is further formed by a cylindrical wall 7 and a lid 8, with which the cylindrical wall 7 is covered.
  • a filling material 9 is introduced, which rests in the centrifuging of the centrifuge 1 at spin speed of the centrifuge drum 2 the same thickness on the cylindrical wall 7 due to centrifugal forces. As seen radially inward, a free surface 10 forms on the filling material 9, which coincides with an imaginary cylinder symmetrical about the axis of rotation 3.
  • a three-phase motor 11 is coupled to the spindle 4 above, which can be connected to a power supply via a frequency converter or DC converter 12 and a power supply 13, wherein the three-phase motor or DC motor 11, the frequency converter or DC converter 12 and the power supply 13 form a drive unit.
  • the frequency converter or DC converter 12 has a detection unit 14 with which instantaneous torques and instantaneous rotational accelerations can be determined at predetermined time operating points during operation of the centrifuge 1.
  • the effective torque of the frequency converter or the DC converter 12 is used by the detection unit 14.
  • the detection unit 14 is also the corresponding operating points of the quotient of the values of respective torques and the values of the respective spins can be determined and stored in a memory element.
  • the centrifuge 1 has a first signal line 15 and a control unit 17, wherein the detection unit 14 and the control unit 17 are coupled via the first signal line 15.
  • a front operating point and a rear operating point are predetermined.
  • the detection unit 14 is set up such that at the front operating point the quotient of the torque present at the front operating point and the rotational acceleration present at the front operating point are detected, determined and stored in the memory element. Furthermore, the detection unit 14 is set up such that, analogously to the front operating point, the quotient of the instantaneous torque and the instantaneous rotational acceleration is likewise detected, determined and stored at the rear operating point.
  • the detection unit 14 can retrieve the first quotient from the memory element and form the ratio of the first and the second quotient. If the ratio of the first quotient to the second quotient is smaller than a predetermined limit value, in particular 1.2, the detection unit 14 can generate a corresponding signal which reaches the control unit 17 via the first signal line 15.
  • the centrifuge drum 2 has on its radially outer side a sieve 18 which is designed perforated so that during operation of the centrifuge 1 liquid from the filling material 9 through the sieve 18 from the centrifuge drum 2 can be discharged. Further, the centrifuge 1 has a washing water adding unit 20 for adding washing water and / or a top syrup adding unit 19 for adding topping syrup to the centrifuge drum 2 during operation of the centrifuge 1.
  • the deck syrup adding unit 19 has a deck syrup reservoir 21 in which deck syrup is provided. Analogously, the wash water addition unit 20 is inserted Wash water reservoir 22, is provided in the wash water.
  • the top syrup adding unit 19 has a top syrup nozzle 27 through which top syrup can be fed from the deck syrup reservoir 21 into the centrifuge drum 2 via a deck syrup control valve 23 which is controllable with a deck syrup valve driving unit 25.
  • the washing water addition unit 20 has a washing water nozzle 28 through which washing water via a washing water control valve 24 which is controllable with a Waschwasserventilan horrungsaku 26, can be guided into the centrifuge drum 2.
  • Both the deck-syrup valve drive unit 25 and the wash-water valve drive unit 26 are coupled to the control unit 17 so that the deck-syrup valve drive unit 25 and the wash-water valve drive unit 26 can be actuated in dependence on signals of the first signal line 15.
  • the control unit 17 is set up such that, depending on signals of the first signal line 15, the control unit 17 outputs signals to a second signal line 16, via which the control unit 17 is coupled to the frequency converter or DC power converter 12.
  • the frequency converter or DC power converter 12 may process signals of the second signal line 16 such that the rotational speed of the centrifuge drum 2 can be reduced or set to zero.
  • the front operating point is in a first acceleration phase and the second operating point is in a rear acceleration phase.
  • the rotational acceleration of the centrifuge drum 2 can be determined as a value greater than zero.
  • the quotient of the torque and the rotational acceleration assumes a finite value at the operating points and is a measure of the moment of inertia of the centrifuge drum 2 and of the contents 9 located in the centrifuge drum 2.
  • the Moment of action of the frequency converter or DC converter 12 used.
  • the rotational speed of the centrifuge drum 2 increases linearly, so that the rotational acceleration is constant in the acceleration phases. If the rotational acceleration is the same in both acceleration phases and the acceleration phases are directly adjacent to one another in terms of time, the rotational speed of the centrifuge drum 2 increases linearly over both acceleration phases. It is conceivable that the acceleration phases are interrupted by a phase with constant speed, in which, for example, an intermediate spin is to be accomplished.
  • the torque and the rotational acceleration are detected at the front operating point during the first acceleration phase, the quotient thereof is formed and stored in the memory element. Subsequently, the torque and the spin are determined at the rear operating point during the second acceleration phase and the quotient thereof is determined.
  • the product is accelerated only once, with the two acceleration phases next to each other and the two operating points in chronological succession.
  • the two acceleration phases may, but not necessarily, be interrupted by an acceleration pause. It is possible to accelerate between the two acceleration phases or the two acceleration phases adjoin one another directly in time.
  • the first quotient is retrieved from the memory element and the ratio of the first quotient and the second quotient is formed.
  • the resulting value is compared with a limit value, and should the ratio be less than the limit value, in particular 1.2, a signal is emitted by the detection unit 14 to the first signal line 15 and output to the control unit 17.
  • the signal from the first signal line 15 is processed such that of the Control unit 17, the valve driving units 25, 26 are controlled such that at least one of the control valves 23, 24 are brought into a throttle position or closed.
  • a signal is emitted, which is input to the frequency converter or DC converter 12 and processed so that the rotational speed of the three-phase motor or DC motor 11 is reduced or set to zero.
  • the quotient of the torque and the rotational acceleration is a measure of the moment of inertia of the centrifuge drum 2 together with the filling material 9.
  • the filling material 9 is a crystal suspension comprising a mixture of crystals and syrup.
  • a green drain When centrifuging the contents 9 exits from the centrifuge drum 2 via the sieve 18 syrup, which is referred to as a green drain.
  • top syrup and wash water are sprayed on the free surface 10 of the medium 9 during centrifugation. During centrifugation, the top syrup and the wash water are removed from the centrifuge drum 2 via the sieve 18 as a cover drain.
  • the speed with which the syrup, the top syrup and the water from the filling material 9 during centrifugation can be discharged depends in particular on the permeability of the filling material 9.
  • the permeability of the filling material 9 results, for example, from the radial layer thickness of the filling material and / or from the grain size of the crystals. For example, if the grain size of the crystals is comparatively small, the crystals settle so close together during centrifuging that the syrup hardly seeps through the filling 9 and can be removed from the centrifuge drum 2. As a result, during centrifugation, the syrup remains as good as completely in the centrifuge drum 2, so that during centrifugation, the moment of inertia of the centrifuge drum 2 hardly changes together with the contents 9.
  • wash water in the centrifuge drum 2 would not be able to be centrifuged sufficiently. As a result, the washing water would accumulate on the free surface 10 of the filling material 9 and be placed in uncontrolled flow conditions. These uncontrolled flow conditions can lead to high mechanical stresses of the centrifuge, whereby the reliability of the centrifuge 1 is at risk.
  • FIGS. 2 to 4 operating configurations of the centrifuge 1 are shown with reference to diagrams whose abscissa is a time axis 29.
  • the speed in the form of a curve 30, the filling thickness prevailing in the centrifuge drum 2 in the form of a curve 31 and the mass moment of inertia in the form of a curve 32 are plotted along the ordinates of the diagrams.
  • the speed curves 30 have constant speed portions and constant speed acceleration portions.
  • the values for the curve 32 of the mass moment of inertia result from the quotients Torque / spin, so that in the areas of constant speed, the curves for the moment of inertia 32 gaps (product spin) 33 have.
  • Periods in which topping syrup is added to the centrifuge drum 2 are designated by the reference numeral 34.
  • the time periods during which wash water is added to the centrifuge drum 2 are designated by the reference numeral 35.
  • FIG. 2 a first operation of the centrifuge 1 is shown.
  • the speed increases linearly from a first operating point 41 to a second operating point 42 and remains constant up to a third operating point 43.
  • the rotational speed 30 again increases linearly up to a fourth operating point 44 and then remains constant again up to a fifth operating point 45.
  • the rotational speed between the second operating point 42 and the third operating point 43 is an intermediate spin speed.
  • the mass moment of inertia between the first operating point 41 and the second operating point 42 is comparatively constant over time, from which it can be deduced that virtually no separation of the filling material 9 in the centrifuge drum 2 takes place during centrifuging.
  • the detection unit 14 outputs such a signal, whereby the wash water control valve 24 is disconnected via the wash water valve drive unit 26.
  • the course after the addition of washing water between the points 43 and 44 is an indication of poor permeability of the filling, caused mostly by a) too late water application, b) too small crystal sizes or coefficients of variation or c) presence of fine grain, and may in the controller 17th be evaluated.
  • FIG. 3 a second operation of the centrifuge drum 2 is shown. From a first operating point 51 to a second operating point 52, the centrifuge 1 is operated at a constant, comparatively low speed. During this period, the centrifuge drum 2 is filled with the contents 9. From the second operating point 52, the centrifuge drum 2 is driven at a constant speed acceleration up to a third operating point 53, wherein in this area the curve 32 of the moment of inertia has a substantially constant course, from which it can be deduced that between the second operating point 52 and the third Operating point 53 as good as no separation takes place.
  • the centrifuge 1 in a pregnant woman was driven at a constant speed, wherein the third operating point 53, the front operating point and the fourth operating point 54, the rear operating point.
  • the ratio of the mass moment of inertia from the front operating point 53 to the rear operating point 54 is about 1.18 and is thus less than the limit of 1.2.
  • topping syrup and / or washing water is reduced or prevented. That is, the task initiated between the front operating point 53 and the rear operating point 54 is reduced by the washing water 35 to the rear operating point 54.
  • the centrifuge 1 is operated at constant speed for spinning.
  • FIG. 4 a third operation of the centrifuge 1 is shown.
  • the centrifuge drum 2 is filled with the filling material 9.
  • the centrifuge drum 2 is constantly accelerated, wherein between the second operating point 62 and the fifth operating point 65, a third operating point 63 as the front operating point and a fourth operating point 64 as the rear operating point.
  • a task 34 of topping syrup takes place, which is indicated by a corresponding increase in the curve 32 of the mass moment of inertia.
  • the top syrup can leave the centrifuge drum 2 again quickly, whereby the curve 32 of the moment of inertia between the front operating point 63 and the rear operating point 64 drops relatively sharply.
  • a task 35 of washing water is provided around the rear operating point 64.
  • the ratio of the values of the mass moment of inertia curve 32 to the front operating point 63 and the rear operating point 64 is 1.31 and is thus above the limit value of 1.2.
  • the detection unit 14 and the control unit 17 the washing water control valve 24 is released, so that the Task 35 can be done by washing water.
  • the task 35 of wash water results in a comparatively constant course of the curve 32 of the moment of inertia, wherein the fifth operating point 65 toward the curve 32 of the moment of inertia caused by the centrifuging of the washing water drops.

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Claims (15)

  1. Centrifugeuse discontinue pour la séparation solide-liquide d'une suspension de cristaux, comprenant un tambour de centrifugation (2), dans lequel la suspension de cristaux peut être remplie en une quantité prédéterminée, en tant que matériau de remplissage (9), et comprenant une unité d'entraînement (11, 12) qui est apte à être entraînée en rotation selon au moins une première phase d'accélération (41, 42 ; 52, 53 ; 62, 63), et, un certain temps après la première phase d'accélération (41, 42 ; 52, 53 ; 62, 63), dans une deuxième phase d'accélération (43, 44 ; 54, 55 ; 64, 65), une unité de dosage de fluide de lavage (19, 20), comprenant une vanne de commande (23, 24), par l'intermédiaire de laquelle un fluide de lavage est apte à être alimenté dans le tambour de centrifugation (2) pour le lavage de la matière de remplissage (9), caractérisé par une unité de détection (14) au moyen de laquelle peut être détecté en temps réel, au cours de la première phase d'accélération (41, 42 ; 52, 53 ; 62, 63) située temporellement en avant du point de fonctionnement (42, 53, 63), un premier quotient du couple instantané et de l'accélération instantanée de rotation du tambour de centrifugation (2), et, au cours de la deuxième phase d'accélération (43, 44 ; 54, 55 ; 64, 65) se trouvant temporellement de façon postérieure au point de fonctionnement (43, 54, 64), un deuxième quotient du couple instantané et de l'accélération instantanée de rotation du tambour de centrifugation (2), et une unité de commande (17), au moyen de laquelle la vanne de commande (23, 24) est apte à être commandée de telle sorte que la vanne de commande (23, 24) soit placée dans une position d'étranglement dès que le point de fonctionnement postérieur (43, 54, 64) est inférieur à une valeur de seuil prédéterminée correspondant au rapport du premier quotient et du deuxième quotient, de sorte que l'addition du fluide de lavage dans le tambour de centrifugation (2) est à apte à être réduite.
  2. Centrifugeuse selon la revendication 1, dans lequel une position d'étranglement est la position de fermeture de la vanne de commande (23, 24), de sorte que l'addition du fluide de lavage dans le tambour de centrifugation (2) est apte à être empêché.
  3. Centrifugeuse selon la revendication 1 ou la revendication 2, dans laquelle la valeur de seuil est de 1,2.
  4. Centrifugeuse selon l'une des revendications 1 à 3, dans laquelle l'unité d'entraînement (11, 12) est apte à être actionnée par l'unité de commande (17), de sorte que dès qu'au niveau du point de fonctionnement postérieur (43, 54, 64), le rapport entre le premier quotient et le deuxième quotient est inférieur à la valeur de seuil prédéterminée, la vitesse de rotation est réduite à une vitesse de rotation limite prédéterminée, qui est inférieure à la vitesse de rotation au point de fonctionnement postérieur (43, 54, 64), et qui en particulier est nulle.
  5. Centrifugeuse selon l'une des revendications 1 à 4, dans laquelle l'unité de dosage de fluide de lavage est une unité d'addition d'eau de lavage (20) au moyen de laquelle le liquide de lavage, en tant qu'eau de lavage, est apte à être alimenté dans le tambour de centrifugation (2).
  6. Procédé pour commander le fonctionnement d'une centrifugeuse discontinue (1) selon l'une des revendications 1 à 5, comprenant les étapes consistant à :
    a) alimenter la centrifugeuse (1) avec le matériau de remplissage (9) de façon à remplir le tambour de centrifugation (2) ;
    b) faire fonctionner le tambour de centrifugation (2) dans un mode de rotation, de façon qu'il ait une première phase d'accélération (41, 42 ; 52, 53 ; 62, 63) et une deuxième phase d'accélération (43, 44 ; 54, 55 ; 64, 65) ;
    c) détecter en temps réel, au cours de la première phase d'accélération (41, 42 ; 52, 53 ; 62, 63) située temporellement en avant du point de fonctionnement (42, 53, 63), un premier quotient du couple instantané et de l'accélération instantanée en rotation du tambour de centrifugation (2) et, au cours de la deuxième phase d'accélération (43, 44 ; 54, 55 ; 64, 65) se trouvant temporellement en un point de fonctionnement postérieur (43, 54, 64), un deuxième quotient du couple instantané et de l'accélération instantanée en rotation du tambour de centrifugation (2) ;
    d) actionner la vanne de commande (23, 24) de telle sorte que la vanne de commande (23, 24) soit placée dans la position d'étranglement dès qu'au niveau du point de fonctionnement postérieur (43, 54, 64), le rapport entre le premier quotient et le deuxième quotient est inférieur à la valeur de seuil prédéterminée, de sorte que l'addition du fluide de lavage dans le tambour de centrifugation (2) est apte à être réduite.
  7. Procédé selon la revendication 5, dans lequel la position d'étranglement est la position de fermeture de la vanne de commande (23, 24), de sorte que l'addition du fluide de lavage dans la centrifugeuse à tambour (2) est empêchée.
  8. Procédé selon la revendication 6 ou la revendication 7, dans lequel la valeur limite est de 1,2.
  9. Procédé selon l'une des revendications 6 à 8, dans lequel l'unité d'entraînement (11, 12) est commandée de telle sorte que dès qu'au niveau du point de fonctionnement postérieur (43, 54, 64), le rapport du premier quotient au deuxième quotient est inférieur à la valeur de seuil prédéterminée, la vitesse est réduite à la vitesse de rotation limite prédéterminée, et en particulier est nulle.
  10. Procédé selon l'une quelconque des revendications 6 à 9, dans lequel, pendant la phase d'accélération (41, 42 ; 52, 53 ; 62, 63 ; 43, 44 ; 54, 55 ; 64, 65), la vitesse de rotation est à chaque fois augmentée de façon linéaire au cours du temps.
  11. Procédé selon l'une quelconque des revendications 6 à 10, dans lequel entre la première phase d'accélération (41, 42 ; 52, 53 ; 62, 63) et ladite deuxième phase d'accélération (43, 44 ; 54, 55 ; 64, 65) se trouve une phase intermédiaire de rotation, au cours de laquelle la vitesse de rotation est maintenue constante au cours du temps.
  12. Procédé selon l'une quelconque des revendications 6 à 11, dans lequel au point de fonctionnement postérieur (43, 54, 64) ou après ce point, du fluide de lavage est introduit dans le tambour de centrifugation (2) lorsque l'actionnement de la vanne de commande (23, 24) est omis, la vanne de commande (23, 24) étant placée dans la position d'étranglement.
  13. Procédé selon la revendication 12, dans lequel le fluide de lavage est de l'eau de lavage.
  14. Procédé selon l'une quelconque des revendications 6 à 13, dans lequel au niveau du point de commande avant (42, 53, 63), ou avant ce point, un produit sirupeux de recouvrement est introduit dans le tambour de centrifugation (2).
  15. Procédé selon l'une quelconque des revendications 6 à 14, dans lequel le couple est déterminé à l'aide du couple effectif du variateur de fréquence ou convertisseur de courant continu (12).
EP15164466.3A 2015-04-21 2015-04-21 Centrifugeuse discontinue doté d'un dispositif de commande destiné à commander le fonctionnement de la centrifugeuse et procédé de fonctionnement de la centrifugeuse Active EP3085452B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PL15164466T PL3085452T3 (pl) 2015-04-21 2015-04-21 Wirówka o działaniu nieciągłym z urządzeniem sterującym do sterowania pracą wirówki oraz sposób napędzania wirówki
EP15164466.3A EP3085452B1 (fr) 2015-04-21 2015-04-21 Centrifugeuse discontinue doté d'un dispositif de commande destiné à commander le fonctionnement de la centrifugeuse et procédé de fonctionnement de la centrifugeuse
DK15164466.3T DK3085452T3 (en) 2015-04-21 2015-04-21 Discontinuous centrifuge with a control device for controlling the operation of the centrifuge and a method for operating the centrifuge
PCT/EP2016/058885 WO2016170047A1 (fr) 2015-04-21 2016-04-21 Centrifugeuse discontinue munie d'un dispositif de commande permettant de commander le fonctionnement de la centrifugeuse, et procédé permettant de faire fonctionner la centrifugeuse
HRP20171293TT HRP20171293T1 (hr) 2015-04-21 2017-08-28 Diskontinuirana centrifuga s upravljačkim uređajem za upravljanje radom centrifuge i postupak upravljanja centrifugom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15164466.3A EP3085452B1 (fr) 2015-04-21 2015-04-21 Centrifugeuse discontinue doté d'un dispositif de commande destiné à commander le fonctionnement de la centrifugeuse et procédé de fonctionnement de la centrifugeuse

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EP3085452A1 EP3085452A1 (fr) 2016-10-26
EP3085452B1 true EP3085452B1 (fr) 2017-06-07

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EP (1) EP3085452B1 (fr)
DK (1) DK3085452T3 (fr)
HR (1) HRP20171293T1 (fr)
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WO (1) WO2016170047A1 (fr)

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CN108654851B (zh) * 2018-06-14 2023-04-18 张家港市中南化工机械有限公司 离心机安全保护装置
DE102019106842A1 (de) 2019-03-18 2020-09-24 Bma Braunschweigische Maschinenbauanstalt Ag Verfahren zum Regeln des Betriebes einer kontinuierlich oder periodisch arbeitenden Zentrifuge und Einrichtung zur Durchführung des Verfahrens
EP4342588A1 (fr) * 2022-09-22 2024-03-27 Siemens Aktiengesellschaft Procédé et dispositif de surveillance d'une centrifugeuse
CN115338042B (zh) * 2022-10-17 2023-02-03 苏州星亿机械有限公司 一种基于卸料离心机的离心装置

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DE4431846C2 (de) * 1994-09-07 2001-02-15 Diehl Ako Stiftung Gmbh & Co Verfahren zum beladungsabhängigen Steuern und/oder Regeln einer Waschmaschine oder eines Wäschetrockners
US6063292A (en) * 1997-07-18 2000-05-16 Baker Hughes Incorporated Method and apparatus for controlling vertical and horizontal basket centrifuges
EP2275207B1 (fr) * 2009-07-16 2011-09-07 BWS Technologie GmbH Centrifugeuse discontinue dotée d'un dispositif de commande de nettoyage et procédé de fonctionnement de la centrifugeuse

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EP3085452A1 (fr) 2016-10-26
DK3085452T3 (en) 2017-09-18
PL3085452T3 (pl) 2017-12-29
WO2016170047A1 (fr) 2016-10-27
HRP20171293T1 (hr) 2017-10-20

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