EP2827975B1 - Système et procédé de démarrage d'agitateurs dans un sédiment - Google Patents

Système et procédé de démarrage d'agitateurs dans un sédiment Download PDF

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Publication number
EP2827975B1
EP2827975B1 EP13717159.1A EP13717159A EP2827975B1 EP 2827975 B1 EP2827975 B1 EP 2827975B1 EP 13717159 A EP13717159 A EP 13717159A EP 2827975 B1 EP2827975 B1 EP 2827975B1
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EP
European Patent Office
Prior art keywords
purging
stirring
pump
sediment
medium
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
Application number
EP13717159.1A
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German (de)
English (en)
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EP2827975A2 (fr
Inventor
Jochen Jung
Wolfgang Keller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EKATO Ruehr und Mischtechnik GmbH
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EKATO Ruehr und Mischtechnik GmbH
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Publication of EP2827975A2 publication Critical patent/EP2827975A2/fr
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Publication of EP2827975B1 publication Critical patent/EP2827975B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
    • B08B9/0933—Removing sludge or the like from tank bottoms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/02—Maintaining the aggregation state of the mixed materials
    • B01F23/023—Preventing sedimentation, conglomeration or agglomeration of solid ingredients during or after mixing by maintaining mixed ingredients in movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/53—Mixing liquids with solids using driven stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B01F27/906—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms  with fixed axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/402—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/402—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements
    • B01F33/4021—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements the gas being introduced through the shaft of the stirring element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/406—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles with gas supply only at the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/3204—Motor driven, i.e. by means of an electric or IC motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements
    • B01F35/605—Safety devices concerning the operation of the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/58—Mixing liquids with solids characterised by the nature of the liquid
    • B01F23/581—Mixing liquids with solids, slurries or sludge, for obtaining a diluted slurry

Definitions

  • the present invention relates to a system and method for the controlled start-up of agitators in a sediment.
  • One or more stirring devices can be operated simultaneously or alternately, so that there is no settling of solids.
  • providing emergency generators for many large agitators is associated with high investment costs.
  • An intermittent operation of several agitators offers the advantage that the emergency power supply can be made smaller, but has the disadvantage that the reconnection of an agitator only works when the settling times are sufficiently long. For example, it also forms for large containers with a filling height of 10 to 20 m and a high particle sinking speed of 1 to 10 cm / sec, the sediment can be harvested within a few to a few minutes.
  • US 7,331,704 B2 describes a draft tube arrangement with a stirrer.
  • the stirrer is arranged so that it is above the sediment in case of standstill.
  • the guide tube is slotted at the bottom to allow easy flushing.
  • DE 34 42 294 A1 describes a device for homogenizing and suspending solids in a pool.
  • a pneumatic and / or hydraulic traction aid is provided, which facilitates sedimentation of the stirring blades in sedimented solids.
  • the traction help consists of pumps and nozzles. It is described how by means of the pumps and the nozzles by sucking liquid from the upper region of a slurry and pushing this liquid through corresponding pipelines and pumps through the nozzles in the lower Beckeri Scheme or container area can be a loosening of the sediment and the agitator be driven only after sufficient loosening of the sediment.
  • WO-A-2008/082339 discloses a system according to the preamble of claim 1 and a method according to the preamble of claim 14.
  • the rinsing agent is liquid.
  • the purging device in particular has a pump and supply lines through which the pump pumps the means for purging.
  • the supply lines are in particular designed such that they lead the means for rinsing under or on the Rlickorgan romance. It is possible that as a rinsing agent liquid from the clear mirror is used, which is withdrawn from the pump and fed to the supply lines.
  • the supply lines have in particular channels and outlets, which are part of the stirring organ leaves.
  • a tubular stirrer which is connected to the supply lines and whose purge tubes are directed substantially parallel and in alignment with the stirrer blades to the outside, preferably sits on the shaft end below the free-to-tumble stirrer.
  • the supply lines may also have free spouts, which are in such a defined position to the Rlickorgan carefuln that the means for rinsing enters the vicinity of the Rlickorgan stricture.
  • the agitator preferably stops at a defined angular position with respect to the free spins.
  • a wave catch ring is preferably provided, which supports the shaft bearing the Rhackorganence; to avoid mechanical bending of the shaft when starting, in which a maximum engine torque is required.
  • the wave collecting ring is advantageously connected together with the free spins to a common, mechanically robust structure.
  • the controller is provided with means for measuring a sedimentation level, ie a settled amount of solid, or a level of a clear mirror.
  • the device for measuring measures a density or a pressure difference.
  • the device for measuring can also be designed such that it calculates a settled amount of solids from physical values of the suspension by calculation.
  • the agitator operating device preferably operates stirrers in response to the determined sedimentation level.
  • the drive motor of the agitator is particularly frequency-controlled operable and the agitator is preferably ramped up via a ramp time.
  • the system may comprise a plurality of agitators, wherein an emergency generator is provided which operates at least one of the agitators intermittently.
  • the pump is preferably a circulation pump which circulates the purge means within the container while maintaining the existing pressure.
  • the circulation pump is in particular a pump which is used in normal operation for conveying suspension.
  • the purging pump is preferably put into operation a short time after a failure of agitators.
  • an emergency generator is preferably provided which supplies power to the pump of the purging device.
  • an intermediate container is preferably provided, which is arranged above a Sedimentations Ou and is filled if necessary by means of the pump with the means for rinsing, which is provided for brief flushing available.
  • the device for operating stirrers is put into operation in particular with a time delay after a predetermined time for putting the flushing device into operation.
  • the controller is also preferably provided with means for measuring pressure and / or volumetric flow in the supply lines to provide flushing results.
  • An agitator is preferably restarted in accordance with the flushing results obtained by the means for measuring pressure and / or flow in the supply lines.
  • a method according to claim 14 is carried out by means of a controller.
  • FIGS. 1 . 4 and 5 each show an embodiment of a system for controlled start-up of agitators in a sediment according to the present invention.
  • the system has in each case a container 1 for receiving substances to be processed, an agitator device with stirrer blades 3 for stirring the substances to be processed in the container 1, a purging device and a device 2 for operating agitators.
  • the rinsing device is arranged and adapted to supply means for rinsing away the sediment to a sediment formed.
  • the rinsing device has in particular one in the FIGS. 1 . 4 and 5 not shown pump 4 and at least one supply line 6, through which the pump 4 pumps the means for rinsing, on.
  • the flushing device is designed in different ways as needed and will be explained in more detail with reference to the figures.
  • a sediment height is denoted by 8 and a clear liquid level is denoted by 9.
  • the flushing means is preferably liquid. It is possible that fluid from the clear mirror 9, which is drawn off from the pump 4 and supplied to the at least one supply line 6, is used as the means for rinsing free. When using the liquid above the sediment, ie from the clear mirror 9, a continuous rinsing is possible without the container 1 is overfilled.
  • the device for measuring measures a density or a pressure difference.
  • the device for measuring can also be designed such that it calculates a settled amount of solids from physical values of the suspension by calculation.
  • the device 2 for operating agitators preferably puts stirrers into operation as a function of the determined sedimentation height 9.
  • a drive motor of the agitator as a device 2 for operating agitators is in particular frequency-controlled operable and the agitator is preferably ramped up via a ramp time.
  • the system may comprise a plurality of agitators, wherein preferably an emergency generator is provided, which operates at least one of the agitators intermittently.
  • the purging pump 4 is preferably a circulation pump that circulates the purging means within the container 1 while maintaining the existing pressure.
  • a circulation pump in particular a pump can be used, which is used in normal operation for conveying suspension.
  • the pump 4 of the purging device is preferably put into operation shortly after a failure of agitators. It is particularly advantageous that in a pressurized container 1, the circulation pump does not have to build up the internal pressure, but only circulates the medium within the pressure chamber. In addition, it is advantageous if the pump 4 starts in case of failure of the agitator. The maximum time until the pump starts up should be such that the flushing holes are not yet covered with sediment when they are below the sediment.
  • an emergency generator is preferably provided, which supplies power to the pump 4 of the purging device.
  • an emergency generator for the pump 4 is sufficient, the connected load can be sized smaller by a factor of 2 to 10 than the power of the agitator motor 2.
  • the fact that only the pump 4 of the purging device is to be supplied with power, thus becomes a Electricity required in the event of a breakdown reduced.
  • an intermediate container 5 is preferably provided, which is arranged above a sedimentation level 8 and is filled by the pump 4 with the means for flushing if necessary and from which the means for rinsing then gradually or "suddenly "is led to the sediment.
  • the device 2 for operating agitators i. the drive motor is put into operation, in particular, with a time delay after a predetermined time has elapsed after the purging device has been put into operation.
  • means are preferably provided for measuring pressure and / or volumetric flow in the supply lines 6 to provide flushing results.
  • An agitator is preferably in accordance with that of in the FIG. 3 shown control with 10 devices for measuring pressure p and / or flow in the at least one supply line 6 obtained results relating to the flushing again in operation.
  • a large pump and possibly also a large intermediate container may be useful. It is sufficient to set the output in such a way that the flushing volume and the flushing pressure are sufficient to start the agitator. Once the agitator is running, you can (re) start the next agitator and so on, until all agitators run again.
  • the at least one supply line 6 is in particular designed such that it leads the flushing means below or to the agitator blades 3.
  • the at least one supply line 6 may have free spins which are in such a defined position to the agitator leaves 3, that the means for rinsing reaches the vicinity of the Rlickorganmind 3.
  • the agitator preferably stops at a defined angular position with respect to the free spins.
  • FIG. 1 two supply lines 6 are shown as free spouts into which the means for rinsing in the direction of the illustrated arrows by means of the pump of the rinsing device is introduced.
  • the flushing means is then pumped through the free spins, which are first at the inner edge of the container 1 and then angled towards the Rrockorganmindn 3.
  • the Rrockorganworkn 3 then exits the means for purging from the Frei Albanylanzen and serves there for purging the sediment, so that a start of the agitator is made possible in the sediment.
  • FIG. 2 is that in FIG. 1 shown embodiment shown in more detail.
  • the device 2 for operating the agitator, the agitator blades 3 and the supply lines 6 of the purging device, a pump 4 is shown, the liquid that removes the clear liquid level 9 and then the supply lines 6 supplies.
  • FIG. 2 also a wave catch ring 20 is shown supporting the shaft bearing the agitator blades 3; to avoid mechanical bending of the shaft when starting, in which a maximum engine torque is required.
  • the wave catching ring 20 is advantageously connected together with the free spreaders 6 to a common mechanically robust structure 30.
  • FIG. 3 shows a more detailed illustration of in FIG. 1 illustrated embodiment.
  • an intermediate container 5 is shown, in which the clear liquid level 9 pumped liquid can be stored until it is needed.
  • Whether the liquid is needed is determined by a controller 10 including a measuring technique designated p for measuring pressure and / or volumetric flow in the at least one supply line 6 and measuring the level F of the intermediate container 5.
  • a check valve 12 controlled by the controller 10 for controlling a flow of liquid from the surge tank 5 to the supply lines.
  • the system for approaching agitators in the sediment can be configured flexibly and as needed.
  • the pump 4, the intermediate container 5 and the controller 10 (with measuring technology, etc.) not only in the in FIG. 1 shown embodiment of the present invention are provided or can be provided, but that in the FIGS. 4 and 5 shown embodiments of the present invention with the pump 4, the intermediate container 5 and the controller 10 (with measurement technology, etc.) are equipped or can be equipped.
  • a supply line 6 is shown as free spins, in which the means for rinsing in the direction of the arrow shown by means of the pump 4 of the rinsing device is introduced.
  • the flushing means is then pumped through the free-spreader lance, which first extends at the inner edge of the container 1, angled at the bottom of the container towards the center of the container 1 and then angled in the center of the container 1 at its bottom in the upward direction and until just below the Rrockorganmind 3 runs.
  • FIG. 5 a system with several stirrers with stirrer blades 3 is shown. Of the four stirrers shown, two stirrers are shown in the sediment below the sediment level 8, and the other two stirrers are shown above the sediment but below the clear liquid level 9.
  • a means for purging is supplied in the same manner, as already with reference to the FIG. 1 is described. Different from the FIG. 1 However, the means for purging of the two free spreading 6 is slightly above the Rrockorganmind 3 supplied.
  • a pipe 11 is shown, which is supplied in the direction of darg Popeen arrow means for purging.
  • the means for rinsing can of the in the FIG. 3 shown intermediate container, which is located above the agitator, are supplied.
  • the tube 11 extends downwardly on the inner wall of the container 1 towards the bottom of the container 1, is angled slightly above the bottom towards the center of the container 1 and is angled in the center of the container in an upward direction to the center of the stirring member ,
  • the means for purging is discharged into channels, which are located in the Rlickorganstoryn 3. From there, the means for purging is discharged through outlets on the stirrer blades 3 in the sediment.
  • a flushing means is supplied to the sediment at two points, at which points there are stirring elements in the sediment.
  • both stirring elements located in the sediment can be flushed out.
  • 6 additional free spouts can be installed as supply lines.
  • an already existing aeration system which is supplied with the means for flushing and serves for a short time as a flushing device.
  • a method is carried out in which after detecting a failure of an agitator with agitator motor with concomitant sedimentation of recorded in the container to be processed substances, the lances are sporadically flushed in supply lines with the means for flushing.
  • the sediment is fluidized by flushing with compressed air or the flushing means.
  • the agitator is started up in reversing operation.
  • the fluidization is stopped and the reversing operation is continued.
  • the operation of the agitator is stopped briefly and the agitator motor is switched to the standard direction of rotation.
  • the agitator is operated in normal operation.
  • the operation of the stirrer in normal operation is carried out for a certain time while monitoring the operation by means of the controller and its facilities for measuring.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Claims (15)

  1. Système pour démarrage contrôlée d'agitateurs dans un sédiment, lequel système comprenant :
    - un récipient (1) pour recevoir de matières à traiter ;
    - un dispositif d'organe d'agitation avec d'ailettes d'organe d'agitation (3) pour agiter les matières à traiter dans le récipient (1) ;
    - un appareil de rinçage disposé et conçu pour alimenter à un sédiment déposé de moyen à rinçage du sédiment ;
    - un dispositif (2) pour opérer d'agitateurs ; et
    - une commande (10) initiant une remise en service contrôlée d'agitateurs après le rinçage,
    caractérisé en ce que la commande (10) est pourvue d'un dispositif pour mesurer un niveau de sédimentation (8), ce qui signifie une quantité de matière solide sédimentée, ou un niveau de l'eau claire (9).
  2. Système selon la revendication 1, caractérisé en ce que l'appareil de rinçage comporte une pompe (4) et au moins un conduit d'alimentation (6), à travers duquel la pompe (4) pompe le moyen à rinçage, l'au moins un conduit d'alimentation (6) comprenant de canaux et sorties qui sont parts des ailettes d'organe d'agitation (3).
  3. Système selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'appareil de rinçage comporte une pompe (4) et au moins un conduit d'alimentation (6), à travers duquel la pompe (4) pompe le moyen de rinçage, l'au moins un conduit d'alimentation (6) comprenant de lances de rinçage situées dans une position définie relativement à les ailettes d'organe d'agitation (3) de cette manière que le moyen de rinçage parvient dans la proximité des ailettes d'organe d'agitation (3).
  4. Système selon la revendication 3, caractérisé en ce que l'agitateur s'arrête à une position angulaire définie relativement à les lances de rinçage (6).
  5. Système selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un collier de support d'arbre (20) est prévu, lequel soutient l'arbre portant les ailettes d'organe d'agitation (3).
  6. Système selon la revendication 1, caractérisé en ce que le dispositif (10) de mesure mesure une densité ou une différence de pression.
  7. Système selon la revendication 1, caractérisé en ce que le dispositif (10) de mesure détermine par calcul de valeurs matérielles de la suspension une quantité sédimentée de matière solide.
  8. Système selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le dispositif (2) pour opérer d' agitateurs met d' agitateurs en opération en dépendance au niveau de sédimentation (8) déterminé.
  9. Système selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un moteur d'entraînement de l'agitateur peut être opéré comme dispositif (2) pour opérer d'agitateurs avec régulation de fréquences, et l'agitateur est démarré par temporisation via une rampe.
  10. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de rinçage comporte une pompe (4) et au moins un conduit d'alimentation (6), à travers duquel la pompe (4) pompe le moyen de rinçage, la pompe (4) étant une pompe de circulation faisant circuler le moyen de rinçage dans le récipient (1) gardant la pression actuelle, et que la pompe de circulation est une pompe (4) employée dans l'opération normale pour transporter une suspension.
  11. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de rinçage comporte une pompe (4) et au moins un conduit d'alimentation (6), à travers duquel la pompe (4) pompe le moyen de rinçage, un récipient intermédiaire (5) étant prévu, lequel est disposé au-dessus d'un niveau de sédimentation (8) et si besoin est rempli, par le biais de la pompe (4), du moyen de rinçage fourni pour un rinçage bref.
  12. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la commande (10) est pourvue de dispositifs pour mesurer une pression ou un flux volumique dans l'au moins un conduit d'alimentation (6), pour rendre des résultats concernant le rinçage.
  13. Système selon la revendication 12, caractérisé en ce qu'un agitateur est remis en service conformément aux résultats obtenus par les dispositifs (10) pour mesurer une pression ou un flux volumique dans l'au moins un conduit d'alimentation (6) concernant le rinçage.
  14. Procédé pour démarrage contrôlée d'agitateurs dans un sédiment dans un système, notamment selon l'une quelconque des revendications précédentes, par le biais d'une commande (10), le système comprenant :
    - un récipient (1) pour recevoir de matières à traiter ;
    - un dispositif d'organe d'agitation avec des ailettes d'organe d'agitation (3) pour agiter les matières à traiter dans le récipient (1) ;
    - un appareil de rinçage disposé et conçu pour alimenter à un sédiment déposé de moyen à rinçage du sédiment ;
    - un dispositif (2) pour opérer d'agitateurs ; et
    - une commande (10) initiant une remise en service contrôlée d'agitateurs après le rinçage, le procédé comprenant les suivants étapes subséquentes :
    - après constatation d'une défaillance d'un agitateur avec moteur d'agitateur, accompagnée de sédimentation de matières à traiter reçues dans le récipient (1), rinçage sporadique de lances dans de conduits d'alimentation (6) avec le moyen de rinçage ;
    - fluidification du sédiment par le biais de rinçage avec de l'air comprimé ou avec le moyen de rinçage ;
    caractérisé en ce que le procédé comprend les suivant étapes additionnelles subséquentes :
    - démarrage de l'agitateur dans l'opération réversible tenant la fluidification ;
    - arrêt de la fluidification et continuation de l'opération réversible ;
    - bref arrêt de l'opération de l'agitateur et de l'agitateur, et basculement du moteur de l'agitateur dans la direction rotative standard ; et
    - opération de l'agitateur dans l'opération normale.
  15. Procédé selon la revendication 14, dans lequel l'opération de l'agitateur est effectuée dans l'opération normale pendant un certain temps avec surveillance de l'opération via la commande (10).
EP13717159.1A 2012-03-23 2013-03-20 Système et procédé de démarrage d'agitateurs dans un sédiment Not-in-force EP2827975B1 (fr)

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EP2827975A2 (fr) 2015-01-28
WO2013139477A2 (fr) 2013-09-26
US20150085598A1 (en) 2015-03-26
RU2014142574A (ru) 2016-05-20
AU2013234754A1 (en) 2014-09-18
US10252227B2 (en) 2019-04-09
RU2614274C2 (ru) 2017-03-24
WO2013139477A3 (fr) 2013-12-05
DE102013004827A1 (de) 2013-09-26
ZA201406153B (en) 2015-11-25
CA2866951A1 (fr) 2013-09-26
AU2013234754B2 (en) 2017-08-31

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