EP2827975A2 - Système et procédé de démarrage d'agitateurs dans un sédiment - Google Patents

Système et procédé de démarrage d'agitateurs dans un sédiment

Info

Publication number
EP2827975A2
EP2827975A2 EP13717159.1A EP13717159A EP2827975A2 EP 2827975 A2 EP2827975 A2 EP 2827975A2 EP 13717159 A EP13717159 A EP 13717159A EP 2827975 A2 EP2827975 A2 EP 2827975A2
Authority
EP
European Patent Office
Prior art keywords
flushing
agitator
sediment
agitators
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13717159.1A
Other languages
German (de)
English (en)
Other versions
EP2827975B1 (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
Original Assignee
EKATO Ruehr und Mischtechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP2827975A2 publication Critical patent/EP2827975A2/fr
Application granted granted Critical
Publication of EP2827975B1 publication Critical patent/EP2827975B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B01F23/50—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
    • B01F23/02—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
    • B01F23/58—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.
  • No. 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 basin.
  • a pneumatic and / or hydraulic traction aid is provided which facilitates sedimentation of the stirring blades with 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 Beckeh Scheme or container area can be made a loosening of the sediment and the agitator be driven only after sufficient loosening of the sediment.
  • the system for the controlled start-up of agitators in a sediment comprises: a container for receiving substances to be processed; a stirrer device with stirrer blades for stirring the working substances in the container; a rinsing device; and a device for operating agitators.
  • the rinsing device is arranged and adapted to supply means for rinsing the sediment to a sediment formed.
  • the rinsing device is designed as required in different ways.
  • a control is provided which causes a controlled re-commissioning of agitators after flushing.
  • 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 purging under or to the R.
  • 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 Rlickorgancen 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 Rhackorgan criticism; 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 control with means for measuring a sedimentation height, i. a settled amount of solid, or a level of a clear mirror provided.
  • 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 Abu 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.
  • 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 is carried out by means of a control, which method has the following successive steps: after detecting a failure of an agitator with agitator motor with concomitant sedimentation of substances to be processed received in the container Sponges are laved sponges in supply lines with the flushing means; the sediment is fluidized by flushing with compressed air or the flushing means; while maintaining fluidization, the agitator is started up in reversing operation; the fluidization is stops and reversing operation continues; the operation of the agitator is stopped briefly and the agitator motor is switched to the standard direction of rotation; and then the agitator is operated in normal operation. The operation of the stirrer in normal operation takes place for a certain time while monitoring the operation by means of the controller.
  • the system for starting agitators in a sediment according to the present invention is particularly simple and universally applicable. By means of the control, a controlled restart of agitators takes place.
  • Fig. 1 shows a first embodiment of a system according to the invention for the controlled start-up of agitators in a sediment
  • FIG. 2 shows a more detailed illustration of the first embodiment shown in Fig. 1;
  • FIG. 3 is a further detailed representation of the first shown in Figure 1
  • Embodiment shows
  • Fig. 4 shows a second embodiment of a system according to the invention for the controlled start-up of agitators in a sediment
  • FIG. 5 shows a third embodiment of a system according to the invention for the controlled start-up of agitators in a sediment.
  • Figures 1, 4 and 5 each show an embodiment of a system for the 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 purging device has, in particular, a pump 4, not shown in FIGS. 1, 4 and 5, and at least one supply line 6, through which the pump 4 pumps the means for purging.
  • 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, i. from the clear mirror 9, a continuous rinsing is possible without the container 1 is overfilled.
  • a device for measuring a sedimentation height 8, ie a settled amount of solid, or a height of a clear mirror 9 is furthermore preferably provided.
  • 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 demand in the case of an operating stoppage reduced.
  • an intermediate container 5 is preferably provided, which is arranged above a sedimentation height 8 and if necessary by means of the pump 4 is filled with the means for free-spooling and from which then the means for rinsing gradually or "abruptly "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 put into operation again in accordance with the control 10, shown in FIG. 3, with means for measuring pressure p and / or volumetric flow in the at least one supply line 6.
  • 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 blades 3, that the means for purging reaches the vicinity of the Rlickorganmind 3.
  • the agitator preferably stops at a defined angular position with respect to the free spins.
  • FIG 2 the embodiment shown in Figure 1 is shown in more detail.
  • the device 2 for operating the agitator, the agitator blades 3 and the supply lines 6 of the rinsing device, a pump 4 is shown, the liquid that removes the clear liquid level 9 and then the supply lines 6 supplies.
  • a wave catching ring 20 which supports the agitator blades 3 supporting shaft; 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 further, more detailed illustration of the embodiment shown in FIG.
  • 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. Also shown is a check valve 12 controlled by the controller 10 for controlling a flow of liquid from the surge tank 5 to the supply lines.
  • p 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 starting agitators in the sediment can be configured flexibly and as required.
  • the pump 4, the intermediate container 5 and the controller 10 (with measuring technology, etc.) are not only provided or can be provided in the embodiment of the present invention shown in FIG. 1, but also that shown in FIGS 4 and 5 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.
  • a tubular stirrer 7 connected to the supply line 6, the rinsing tubes of which are oriented essentially parallel and in alignment with the stirrer blades 3 to the outside.
  • the supply line 6 can also be led to the agitator blades 3, where the flushing means can be delivered to channels and outlets, which are part of the Rlickorgangen 3.
  • the agitator blades 3 are to be provided with channels and outlets.
  • FIG. 5 shows a system with a plurality of stirring elements with stirrer blades 3.
  • 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 flushing means is supplied in the same manner as already described with reference to FIG. Different from FIG. 1, however, the means for purging are supplied by the two free-spouts 6 slightly above the agitator blades 3.
  • a tube 1 1 shown, in the direction of darg Senateen arrow means for flushing is supplied.
  • the purging means may be supplied by the intermediate container shown in FIG.
  • the tube 11 runs down 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 extends in the center of the container in an upward direction to the center of the stirring member angled.
  • 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 purging means is supplied to the sediment at two locations where stirring bodies are located in the sediment. Thus, 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. It is also advantageous to mechanically decelerate and position the stirring element so that it comes to a standstill at a defined position, where the free spreaders 6 are also arranged above the agitator blades 3 and the flushing agent stream therefore strikes the agitator blades 3 directly.
  • 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.

Landscapes

  • 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)

Abstract

L'invention concerne un système et un procédé correspondant permettant de démarrer de manière ciblée des agitateurs dans un sédiment. Le système comprend les éléments suivants : un réservoir destiné à contenir les substances à traiter; un dispositif agitateur comprenant des pales agitatrices servant à agiter les substances à traiter dans le réservoir; un système de lavage; et un système servant à faire fonctionner des agitateurs. Le système de lavage est agencé et configuré pour amener dans un sédiment formé des moyens de lavage servant à détacher ce sédiment. L'invention concerne en outre une commande qui assure la remise en marche ciblée des agitateurs après le lavage.
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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DE102012006001 2012-03-23
PCT/EP2013/000846 WO2013139477A2 (fr) 2012-03-23 2013-03-20 Système et procédé de démarrage d'agitateurs dans un sédiment

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EP2827975A2 true EP2827975A2 (fr) 2015-01-28
EP2827975B1 EP2827975B1 (fr) 2016-05-18

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EP (1) EP2827975B1 (fr)
AU (1) AU2013234754B2 (fr)
CA (1) CA2866951A1 (fr)
DE (1) DE102013004827A1 (fr)
RU (1) RU2614274C2 (fr)
WO (1) WO2013139477A2 (fr)
ZA (1) ZA201406153B (fr)

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WO2013139477A2 (fr) 2013-09-26
WO2013139477A3 (fr) 2013-12-05
US10252227B2 (en) 2019-04-09
US20150085598A1 (en) 2015-03-26
ZA201406153B (en) 2015-11-25
EP2827975B1 (fr) 2016-05-18
AU2013234754A1 (en) 2014-09-18
RU2014142574A (ru) 2016-05-20
AU2013234754B2 (en) 2017-08-31
RU2614274C2 (ru) 2017-03-24
DE102013004827A1 (de) 2013-09-26
CA2866951A1 (fr) 2013-09-26

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