EP2772310A2 - Procédé de traitement de produits combustibles à l'aide d'un système séparateur - Google Patents

Procédé de traitement de produits combustibles à l'aide d'un système séparateur Download PDF

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Publication number
EP2772310A2
EP2772310A2 EP14156804.8A EP14156804A EP2772310A2 EP 2772310 A2 EP2772310 A2 EP 2772310A2 EP 14156804 A EP14156804 A EP 14156804A EP 2772310 A2 EP2772310 A2 EP 2772310A2
Authority
EP
European Patent Office
Prior art keywords
space
negative pressure
drive
pressure
hood
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
EP14156804.8A
Other languages
German (de)
English (en)
Other versions
EP2772310A3 (fr
EP2772310B1 (fr
Inventor
Dieter Strauch
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.)
GEA Mechanical Equipment GmbH
Original Assignee
GEA Mechanical Equipment 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 GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP2772310A2 publication Critical patent/EP2772310A2/fr
Publication of EP2772310A3 publication Critical patent/EP2772310A3/fr
Application granted granted Critical
Publication of EP2772310B1 publication Critical patent/EP2772310B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/08—Other accessories for centrifuges for ventilating or producing a vacuum in the centrifuge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/06—Safety devices ; Regulating
    • 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
    • B04B9/02—Electric motor drives

Definitions

  • the invention relates to a method for processing combustible products with a Separatoran angel.
  • the invention has the task of simplifying the processing of such products against this background.
  • the ambient space during the centrifugal separation and / or clearing of the hood and / or - after an advantageous alternative or possibly also training - the drive space set under negative pressure to the environment This prevents a processing of combustible products by reducing the oxygen content in the hood space and / or in the drive space that an explosion occurs at all or that an explosion is triggered, which assumes a damaging or endangering level.
  • Dome space refers to the space of a centrifuge in which the drum rotates and in which thus the product to be separated is processed.
  • the drum is suitable for discharging a solid, so that by opening a piston valve, the solid is discharged discontinuously or, alternatively, can be discharged continuously by means of nozzles.
  • an inert gas is achieved until the atmospheric pressure is reached, in particular supplied to a pressure of at least 50 mbar above atmospheric pressure. Preferably, however, a pressure of 0.5 bar above atmospheric pressure is not exceeded.
  • inert gases preferably instrument air, nitrogen, helium or carbon dioxide are used.
  • separators so in particular in the field of medical or food technology or in the field of milk processing centrifuge drums are arranged and operated in a space having a relative to the environment a negative pressure. Purely by way of example is in the extent to the EP 1 119 416 B1 directed.
  • the separator assembly shown in this document and its used in practice counterpart have a separator drum for liquid / liquid / solid separation with a vertical axis of rotation, which is arranged in a sealed container or hood space, in which a vacuum with a pump can be generated against the environment.
  • the separator drum has an inlet pipe and one or more peeling disks for discharging the one or more liquid phase (s), as well as solids discharge openings for the continuous or intermittent discharge of solids.
  • s liquid phase
  • solids discharge openings for the continuous or intermittent discharge of solids.
  • a negative pressure according to the specification of claims 1 or 2 relative to the environment is preferably also in the components of the drive device - in particular motor, clutch, spindle, bearing and / or other drive components - containing space entirely or at least in a partial area generated in order to exclude the danger of explosion also in the drive space or at least to decrease enough.
  • the drive components can be used in this case in standard design, that is in non-explosion-proof design.
  • a motor does not have to be used as a pressure-tight encapsulated type.
  • the drive space area is evacuated with a pump or other vacuum generating device and / or it is connected to the (hood) space which surrounds the drum, so that a pump or a corresponding device, which optionally complementary in this room creates a vacuum, even in the drive space "with” can create a vacuum.
  • hood space in which the drum is arranged, is placed under negative pressure to the environment, a reduction of the risk of explosion - accompanied by an energy saving - can be achieved here as well.
  • a sealed embodiment of the drum is not preferred.
  • a negative pressure is generated and in which the negative pressure in the hood space and the drive space at least temporarily or permanently during the centrifugal clearing and / or separation during operation is different.
  • the negative pressure in the drive chamber can be constant, during which the underpressure in the hood space is changed during operation as a function of the current or expected operating state, for example, before draining with a piston valve is increased in order to achieve a particularly stable operation.
  • the reverse variant with constant pressure in the hood space or varying pressure in the hood space is conceivable.
  • the pressure can be changed if they are in pressure-compensating connection.
  • the negative pressure in the two areas may also be permanently different in operation, if this nevertheless satisfies the explosion protection.
  • a blocking chamber is provided, in particular, with two axially spaced sealing ring arrangements and a chamber formed between them, which is preferably filled with a fluid such as an inert gas (and thus filled during operation) and preferably between the drive space and the hood space is formed.
  • a fluid such as an inert gas (and thus filled during operation) and preferably between the drive space and the hood space is formed.
  • the two Rooms drive room and hood space hereby separated and sealed from each other.
  • the barrier chamber is then preferably inserted between the rotating spindle and a fixed drive cover.
  • both the drum and the hood space are partially conical.
  • a variant for a vacuum connection may be a connection via a bore in the spindle.
  • the free end of the spindle is guided down through the sealed frame wall and via sealed connections, the connection to a vacuum system.
  • the hole in the spindle ends in the area below the drum in the hood area.
  • the implementation of the spindle through the frame wall is also sealed by means of sliding elements.
  • liquid drains in the drum are usual peeling discs. But it is also a seal / isolation of the gripper / drum by means of a dip disk conceivable.
  • the sealing by means of immersion disk takes place by immersing a stationary disk in a rotating liquid level, so that a liquid seal is formed to the environment on one side of the disk in relation to the other side of the disk.
  • a clarified liquid phase and a separately introduced neutral phase are suitable, e.g. Water. In this case, the product areas and the area of the immersion disk are separated from each other.
  • the vacuum generating means can be activated and / or Inert gas can be added. After reaching the predetermined limits for the vacuum after completion of the Entle fürsvorgangs the vacuum generating means can be turned off again. This allows further optimization of the consumption of inert gas and energy.
  • Particularly advantageous is the use of a fluid, especially oil or water cooled engine.
  • a negative pressure is generated which is below atmospheric pressure, in particular of 0.2 bar or less.
  • a negative pressure is generated during operation, which is in particular 0.1 bar or less, in particular less than 50 mbar. Since the pressure in an explosion typically increases to ten times the prevailing pressure before the explosion, such a pressure increase would be harmless.
  • the value of the negative pressure is changed in any case in the hood space with the drum during operation depending on the operating condition.
  • a change in the negative pressure take place before, during or after a change in the operating state.
  • the change in the operating state which takes place before, during or after the change in the negative pressure, be a solids discharge.
  • the negative pressure when starting or braking the drum can be changed. He could also be slightly increased shortly before or at least during emptying, so that no adverse effects due to the high negative pressure occur during the solids discharge
  • the invention is particularly suitable for a Separatoran Aunt with a separator with a drum with a vertical axis of rotation, which is mounted on a rotatable drive spindle and surrounded by a hood, the drums a drum diameter greater than 500 mm, in particular 800 mm, most preferably greater than 900 mm and / or speeds, for example greater than 8000 rpm, 5000 rpm, 4000 rpm in operation.
  • the peripheral speed at the drum outer diameter is at least 100 m / s or more.
  • the surface of the drum is further preferably 0.5m 2 to 5m 2 , especially 1-3.5m 2 , so that the effect of supporting the generation of negative pressure has a particularly advantageous effect.
  • Fig. 1 shows an embodiment of a separator 1 for carrying out the method according to the invention.
  • the product to be processed may be a product to be clarified or separated into different phases (with different density) and, if appropriate, also to be clarified.
  • a product mixture of several substances is to be regarded as a product.
  • a preferred application is the separator assembly 1 in such a preparation of an alcoholic product, such as a beverage, or for example in the processing or production of fuels.
  • gases or gas mixtures which may arise from the following substance groups by exceeding the flash point: Aliphatic hydrocarbons, such as alkanes, such as propane, alkenes, alkynes; Alcohols, such as methanol, ethanol; Solvents, such as acetone, toluene, n-hexane, benzene, etc.
  • the invention is particularly suitable for the processing of products, in the processing of one or more of these gases may arise.
  • the flash point for 5% ethanol in water is 81 ° C.
  • the flash point for 50% ethanol in water is 24 ° C. Lowering the pressure causes the flashpoint to drop again.
  • the separator assembly 1 has a separator with a vertical axis of rotation D, which includes a rotatable drum 2, which is mounted on a rotatable drive spindle 3.
  • the product feed of the product P which can be processed or processed in continuous operation and which develops flammable gases is preferably carried out from above through a feed pipe 4 (not shown in detail here).
  • This structure is preferred. But it is also a hanging drum with a drive above the drum feasible. The supply of the product through the spindle is conceivable.
  • the drum 2 is here designed to separate the product P to be processed into at least one liquid phase L or several liquid phases and a solid phase S. It points here like the drum of the EP 1 119 416 B1 or the pendant used in practice in the interior, preferably a separation plate stack of separation plates (not visible here).
  • the liquid phases L are discharged from the drum 2 via liquid outlets, in particular peeling disks in the manner of a centripetal pump.
  • the derivative of the solid phase S takes place either discontinuously at discontinuously closable solids discharge openings 5 in the drum shell or continuously through nozzles in the drum shell.
  • the drum 2 is inserted in a sealed against the environment hood space 6.
  • This hood space 6 is here by a hood 7, which is fixed to a foundation - here a machine frame 8 - a cover 9 below the drum, which is fixed to the hood 7 and limited to a spindle housing 10, which is penetrated by the drive spindle 3, set.
  • a solids catcher 11 is further formed, which serves to discharge solids emerging from the drum from the hood space by a solids discharge 12.
  • a pump 14 a (or other means for lowering the pressure in the hood space 6 relative to the environment), with which in the hood space 6, a negative pressure relative to the environment U outside of the hood space 6 can be generated ,
  • this vacuum port 13 is formed at a position which is relative to the rotation axis D at a relatively large radius Rp, in particular at a radius which is equal to or greater than the largest radius R T of the drum second
  • the flammable gas evolving product can be safely processed.
  • the drive space 15 is here limited to a drive housing 17, which according to the task, in the drive chamber 15, a negative pressure relative to the environment U to produce again in accordance with sealed design is executed. These are after Fig. 1 between elements of the drive housing 17 in turn suitable seals 18 are formed.
  • the drive space 15 is bounded by the machine frame 8, as well as closure plates 19, close the openings of the machine frame. At the top, it is bounded by the cover 9 below the drum 2 and the single or multi-part spindle housing 10.
  • the pump 14 b can be connected to a vacuum port 20 of the drive chamber 15.
  • the spindle bearing is wholly or partially - here both a neck bearing 21 a and a predominantly larger 21b - arranged in the negative pressure area. But it is also conceivable that one (in particular the neck bearing 21 a) or both bearings 21 a, b do not belong to this negative pressure range.
  • the spindle housing 10 rests on the machine frame 8 in a flange area supported by elastic elements 40.
  • the drive motor 22 is arranged, which is formed here directly in the axial extension of the drive spindle 3, so that a so-called direct drive for the drum 2 is formed.
  • the rotor 22a is here attached directly to the drive spindle 3 and the stator 22b is in a motor housing 23, which in turn is fixed to the side facing away from the hood space 6 side of the machine frame 8.
  • a direct drive is preferably accommodated in the drive space, wherein the electric drive motor 22 but also between the bearings 21 a, b could be arranged (the latter variant not shown here).
  • the drive motor in the negative pressure region of the drive chamber 15, which is connected via a coupling with the drive spindle 3 (also not shown here).
  • a flameproof motor In this case, it may be sufficient to generate only the hood space a negative pressure.
  • a lubrication system 24 is also arranged, which serves for lubrication of the spindle bearing 21 and / or for the lubrication of components on the engine.
  • the lubrication system here has a lubricant circuit, which the elements oil reservoir 25, pump 26, supply line 27a, b to the spindle bearing 21, oil collection container 28 which is rotatably connected to the spindle and in which a due to the cup-like design in a radius Oil level is formed, a peeling member 29, which discharges the oil in the collecting container, and a return line 27c, d in the oil tank 25 has.
  • all of these elements of the lubrication system are advantageous and compact in the vacuum region, i. in the drive room, housed.
  • a possibly existing pump motor is in this case also designed as a flameproof motor. (if only the hood area is operated with negative pressure)
  • the drive space can be opened in this case to the environment.
  • one or more passage openings 34, 35, 36, 37 are further formed, which ensure that within the drive space 15 as possible no pressure gradients arise.
  • hood space 6 and the drive space 15 are not sealed against each other.
  • cover 9 below the drum 2 is not radially sealed inside the spindle housing 10 but that between these elements, a gap 42 is formed, which ensures a pressure equalization between the hood space 6 and the drive space 15.
  • no seal eg no mechanical seal is needed.
  • the pump 14a is arranged to generate the low pressure by suction on a large, in particular the largest radius / diameter of the hood 7.
  • the suction takes place at a radius of the hood 7, which is based on the axis of rotation on a radius which is greater than 80%, in particular more than 100%, of the largest drum radius.
  • the support by the drum differential pressure effect in particular has an advantageous effect.
  • Equally advantageous and structurally simple would be one or a further vacuum connection through the spindle 3 into the drive space 15 (for example a bore in machines with an external oil aggregate).
  • Particularly advantageous is a use of a fluid, especially oil or water cooled motor, since the cooling effect is reduced by air by the negative pressure in the drive chamber.
  • the separator arrangement in the manner of Fig. 1 meets energy saving requirements.
  • the processing of combustible products is prevented by a reduction in the oxygen content in the hood and / or in the drive compartment that an explosion occurs or that an explosion is triggered, which assumes a harmful or hazardous level.
  • the pump (14a) is designed to generate the back pressure by suction on a large, in particular the largest diameter of the hood.
  • the suction takes place at a diameter of the hood, which is based on the axis of rotation on a larger radius than the largest drum radius.
  • the support by the drum differential pressure effect in particular has an advantageous effect.
  • the one or more vacuum chambers to be set under negative pressure - in particular the hood space and / or the drive space - are designed such that they can temporarily absorb or tolerate a certain overpressure.
  • this pressure can be 0.5 bar, in particular 1 bar.
  • the level of negative pressure can then be chosen and controlled so that it does not exceed 0.5 bar, in particular 1 bar minus the substance-specific explosion pressure.
  • the upper limit as non-harmful pressure of claim 1 for the structure of a separator which is not designed as a pressure device would be defined accordingly, for example as 0.5 bar or 1 bar overpressure, depending on the design of the Separierippo.
  • the maximum occurring explosion pressure of an explosive mixture can - especially depending on the temperature and pressure - determined in the experiment or calculated or possibly looked up in tables.
  • the minimum negative pressure can be determined according to the properties of the processed Separier areas as explained above.

Landscapes

  • Centrifugal Separators (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP14156804.8A 2013-02-27 2014-02-26 Procédé de traitement de produits combustibles à l'aide d'un système séparateur Active EP2772310B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013101961.7A DE102013101961A1 (de) 2013-02-27 2013-02-27 Verfahren zur Verarbeitung brennbarer Produkte mit einer Separatoranordnung

Publications (3)

Publication Number Publication Date
EP2772310A2 true EP2772310A2 (fr) 2014-09-03
EP2772310A3 EP2772310A3 (fr) 2017-12-13
EP2772310B1 EP2772310B1 (fr) 2019-01-09

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ID=50193260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14156804.8A Active EP2772310B1 (fr) 2013-02-27 2014-02-26 Procédé de traitement de produits combustibles à l'aide d'un système séparateur

Country Status (3)

Country Link
EP (1) EP2772310B1 (fr)
DE (1) DE102013101961A1 (fr)
TR (1) TR201904437T4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017130785A1 (de) * 2017-12-20 2019-06-27 Eppendorf Ag Temperierte Zentrifuge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19922237A1 (de) 1999-05-14 2000-12-07 Westfalia Separator Ag Zentrifuge und Verfahren zu deren Betrieb
EP1119416B1 (fr) 1998-10-09 2003-04-16 Westfalia Separator AG Centrifugeuse et son mode de fonctionnement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3304990A (en) * 1965-02-15 1967-02-21 Univ Tennessee Res Corp Explosion proof centrifugal evaporator with magnetic drive
DE7804595U1 (de) * 1978-02-16 1978-11-02 Dr. Karl Thomae Gmbh, 7950 Biberach Mess- und begasungsvorrichtung zum inertisieren von zentrifugen
US5823937A (en) * 1995-11-01 1998-10-20 Carr; Robert B. Low-shear feeding system for use with centrifuges
SE533562C2 (sv) * 2009-03-06 2010-10-26 Alfa Laval Corp Ab Centrifugalseparator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1119416B1 (fr) 1998-10-09 2003-04-16 Westfalia Separator AG Centrifugeuse et son mode de fonctionnement
DE19922237A1 (de) 1999-05-14 2000-12-07 Westfalia Separator Ag Zentrifuge und Verfahren zu deren Betrieb

Also Published As

Publication number Publication date
EP2772310A3 (fr) 2017-12-13
TR201904437T4 (tr) 2019-04-22
DE102013101961A1 (de) 2014-08-28
EP2772310B1 (fr) 2019-01-09

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