EP0454045B1 - Zentrifugen-Trockner - Google Patents

Zentrifugen-Trockner Download PDF

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Publication number
EP0454045B1
EP0454045B1 EP91106497A EP91106497A EP0454045B1 EP 0454045 B1 EP0454045 B1 EP 0454045B1 EP 91106497 A EP91106497 A EP 91106497A EP 91106497 A EP91106497 A EP 91106497A EP 0454045 B1 EP0454045 B1 EP 0454045B1
Authority
EP
European Patent Office
Prior art keywords
drum
centrifugal drier
filter
product
work area
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.)
Expired - Lifetime
Application number
EP91106497A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0454045A3 (en
EP0454045A2 (de
Inventor
Hans Joachim Dipl.-Ing. Titus
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0454045A2 publication Critical patent/EP0454045A2/de
Publication of EP0454045A3 publication Critical patent/EP0454045A3/de
Application granted granted Critical
Publication of EP0454045B1 publication Critical patent/EP0454045B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering

Definitions

  • the invention relates to a centrifuge dryer with a horizontally mounted drive shaft, a drum connected to it, a filter arranged inside the drum, which surrounds a work space that is conically enlarged from the connection side of the drive shaft, and an axially displaceable baffle plate that forms an end face of the work space. and with a centrifuge housing encapsulating a drum and baffle plate.
  • a centrifuge of the type described above which is known from DE-A 30 42 948, contains in a cylindrical drum region a rotating push floor which is driven by axially oscillating movements by a push cylinder guided by the drum shaft.
  • the suspension is distributed to the cylindrical drum area from a feed pipe that opens into the drum by means of a feed pot that rotates with the moving floor, from where the solids are conveyed from the moving floor into a conical drum area after a short dwell time and then thrown off into a stationary collecting housing by centrifugal force.
  • a peeling device For emptying a centrifuge drum, a peeling device is known from DE-A 33 40 636, for example, which peels off the product layer adhering to the drum by means of a peeling head arranged on a telescopic discharge tube after the centrifuging operation has ended. Such devices cause seal abrasion and thus contamination in the product during their movements. In addition, peeling devices have deposition surfaces which are wetted by suspension and, after they have dripped off, cause an unwashed product to crust over. A crust reinforced by peeling dust can flake off in the case of centrifugal vibrations and contaminate the end product.
  • Peeling devices are also problematic in that a residual layer always remains in the drum, the compression of which causes increasingly longer filtration times for the subsequent batches.
  • the centrifuge To remove the residual layer, the centrifuge must be stopped and opened, solvent vapors being drawn off while the residual layer is being scraped off and scooped out. Foreign particles get into the product, and workers and the environment are polluted.
  • the object of the invention is to provide a centrifuge dryer which, while eliminating the above-described disadvantages of known centrifuges in discontinuous or continuous operation with mechanical and / or thermal separation technology, and from which the product is completely emptied in a moist or dry state without avoiding a peeling device that a residual layer remains on the filter.
  • At least one distributor line extending along the jacket with radially inwardly directed nozzles can be provided within the centrifuge housing near the outer drum circumference, which is used to supply washing liquid, backwash the filter surface and / or supply Use compressed air or hot gas. Pressure surges with hot gas can be exerted through the nozzles in order to detach and remove the dehumidified product from the filter. The flowability of the product along the conical drum wall can be increased by external supply of hot gas.
  • a guide device At the mouth of the drive shaft, a guide device can be provided, with which, by means of a variable pre-pressure, suspension or washing liquid impinges on the desired length of the filter cone.
  • At least one blade projecting into the ring channel is attached to the end of the drum, and one or more tangential nozzles for introducing conveying gas can be provided in the ring channel.
  • the cone shell of the drum and the conical circumference of the filter cone enclosing the working space can have several adjoining longitudinal areas with different opening angles have, for example 15 ° on a first longitudinal third for the initial filtration, while a smaller angle on the second longitudinal third causes a slower feed of the product.
  • the mouth of a washing tube which is preferably guided through the drive shaft into the work space, can be designed such that the smooth-walled work space, free of internals, is washed free of adhering mother liquor, regardless of the product washing. If the washing pipe inserted into the drum has nozzles directed towards an inner circumferential area of the working space, the product can be washed on the continuous path along the drum wall between the initial filtration and the final reduction in the final moisture. In this mode of operation, too, the product is discharged completely, in that the entire filter cake is pushed continuously along the drum wall to the ring channel.
  • the dwell time of the product in the work area is also influenced by additional parameters, such as drum speed, friction, viscosity or thixotropy of the product mixture, temperature, strength of the compressed gas surges injected from the outside, etc., so that the filter cone is completely emptied through pulsation promotion without additional mechanical aids.
  • the baffle plate is preferably mounted on an axis guided in the adjacent end wall of the centrifuge housing and axially movable by an adjustment drive.
  • the end of the drum can have a cylindrical or conical outlet collar for receiving a sealing surface of the baffle plate.
  • This proposal results in a pressure chamber centrifuge drum with a solid jacket and a replaceable, multi-layer sintered metal mesh filter cone with a low Surface friction.
  • the annular space between the solid jacket and the filter insert is divided into several chambers, each containing a diffuser opening through which compressed gas is injected by means of fixed nozzles to detach the product from the filter and to simultaneously flow and dry the product.
  • the open drum end carries a flange as a system for the axially displaceable baffle plate, which, as a gas-tight seal, enables the working space in the filter cone to be filled or washed as a sealed container by the drive shaft.
  • the process steps of filling / washing / drying / spinning are carried out in the work area, which is free from internals exposed to wetting with mother liquor and ensures the highest level of product purity.
  • the working space can be subjected to excess pressure in order to reduce the capillary rise in the residual moisture remaining in the product layer adhering to the filter cone and to achieve the lowest final moisture levels. Escaping gas pressure is impossible due to the sealed baffle plate.
  • the product layer is blown off the filter cone by supersonic flow impulses injected into the pressure chambers and the pressure increase thus induced.
  • the product forms, for example, a pile that fills 50% of the work area and is moved at a reduced speed like a drum dryer.
  • hot gas is injected into the pressure chambers below, which is now the circulated Product flows through from below and due to the high gas velocity causes a turbulent product flow with high heat exchange and efficient drying. Since the product is only in a partial area of the filter cone and constantly falls down due to the rotation, the inflowing gas passes through the filter cone, cleaned with dust, and escapes through the diffusers into the centrifuge housing, from where it is passed on through connecting pieces.
  • the housing can have an upper valve-controlled connecting piece for the extraction of drying gas containing solvent or washing liquid.
  • the baffle plate During the drying phase taking place in the negative pressure, normal pressure or positive pressure range, the baffle plate remains in a gas-tight system in the drum flange, so that no leakage flows occur.
  • the baffle plate In order to empty the working space after drying, the baffle plate is removed from the drum flange by means of an axial drive unit and brought into a mode of operation which rotates with the drum or is uncoupled by means of a switching device.
  • An expedient embodiment provides that the free ends of the drum shell and the filter cone are connected to one another in a sealed manner and carry axially directed driver bolts on a circumferential flange which extend through assigned openings of the baffle plate.
  • the driver bolts can have a limited length and, in the case of the outlet gap to the ring channel, a baffle plate which largely exposes them can disengage from their openings.
  • the free end of the drum is surrounded by an inwardly open ring channel from which one or more product delivery lines originate.
  • the baffle plate is displaceable between a position closing the access to the ring channel and a position releasing the exit from the working space.
  • the diffuser openings can consist of curved elongated slot slots arranged on the same pitch circle. - It is expedient if the edge of the diffuser openings protrudes beyond the inner circumference of the drum shell.
  • the face of the nozzle housing can cover the diffuser opening at least in the radial direction.
  • a horizontally mounted hollow shaft 7 is connected to a frequency-controlled drive motor 1 via a V-belt drive 2.
  • the shaft 7 carries a conical perforated centrifuge drum 4, in which a circumferentially closed filter cone 3 is held, which can consist of woven-together sintered metal sieves.
  • the hollow shaft 7 carries a deflection hood 8 in front of the mouth in order to guide the supplied suspension in the direction of the arrow to the smallest drum circumference.
  • the hollow shaft 7 is supported in a bearing housing 18 on a machine stand 15 and carries a connection 5 held by means of a mechanical seal for the supply of suspension or washing liquid.
  • a centrifuge housing 17 is fixedly connected to the bearing housing 18 and is sealed against the shaft 7 via a shaft seal 14 and closed by a cover through which a circular baffle plate 9 can be axially displaced.
  • the baffle plate 9 is mounted on a central axis 20 which is moved by a drive unit 19 arranged on the outside of the cover.
  • the baffle plate 9 can be moved along a stationary guide 21 into an inner guide surface at the extended end of the drum 4 in order to close the working space 23 in a discontinuous operation.
  • a product cake A drawn above the central axis is formed from the filtered suspension.
  • the product, freed from mother liquor, is washed and centrifuged dry.
  • the product is emptied into a ring channel 10, which is sealed off at the periphery of the extended drum end and is open to the inside, has any suitable cross section, is supported on the centrifuge housing 17 or on its cover, and bears a guide 21 solely on account of the centrifugal force , against which the baffle plate lies in its open position 9.2.
  • the drum 4 When spinning dry, the drum 4 can be pressurized via the hollow shaft. Thereafter, hot gas pressure surges can be introduced from one or more distribution lines 16 with a slowly rotating drum, which completely detach the product cake A from the heated filter surface 3. The hot gas entering the drum 4 escapes via a rotating filter attached to the baffle plate 9 through the axis 20 into a vacuum line.
  • a defined outlet gap is set by the baffle plate 9 and the drum 4 is constantly subjected to suspension.
  • the mother liquor is spun off over a first cone length a and collected in a discharge nozzle 6.
  • On a second cone length b, the product is washed with washing liquid injected through the pipeline 25 and then centrifuged dry on a cone length c.
  • the centrifugally moist product flows off without residue into the ring channel 10, in which the blades 11 attached to the drum circumference feed the product to a current dryer 12 or, via the indicated down pipe 13, to a vacuum dryer or container.
  • Radially inwardly directed nozzles extend from the distribution line 16, which in certain cases can consist of a single longitudinal slot and are used optionally for supplying washing liquid, backwashing the filter surface and / or for supplying compressed air or hot gas.
  • a drum base 30 is fastened on the end of the hollow shaft 28, which is inserted into the centrifuge housing 17 in a sealed manner, from which a cylindrical drum shell 32, or a drum drum 32 which is slightly tapered towards its free end, extends.
  • a sintered filter fabric consisting of a stiffened metal filter cone 36, on the outside of which, at circumferential intervals, U-profiles 38 are welded as a receptacle for web walls 40 which extend radially inwards from the drum jacket 32 and which extend into the conical annular space Subdivide gas-tight pressure chambers 42 from one another.
  • Each pressure chamber contains a circular or elongated diffuser opening 44 in the drum base 30, through which pressure surges are injected in its upper positions by one or more nozzles 46 arranged in the fixed rear wall 45 of the housing at selectable intervals.
  • the pressure rise resulting from the supersonic flow in the pressure chamber 42 has the effect that the product layer adhering to the inside of the filter cone 36 is detached and falls over the entire segment surface.
  • a baffle plate 52 is rotatably mounted on an axis 50, which is sealed in the housing cover 48 and which, as in the example according to FIGS. 1 and 2, can be displaced between an end position closing the working space 53 and the exit to the ring channel 54, more or less opening intermediate positions.
  • the drum flange 34 carries a socket with an annular surface 56 for the circumference 58 of the baffle plate. Suspension or washing liquid are fed through the hollow shaft 28 and through an inner tube 60 to the conical ring nozzles 28a or 60a.
  • filtered mother liquor or washing liquid passes through the filter cone 36 into the pressure chambers 42 and flows from there along the drum shell through the diffuser openings 44 into the housing 17 or through its collecting connection 72.
  • the entire apparatus is operated during of the spin operation slightly inclined, namely raised at the left end in Fig. 2.
  • the hollow space 28 is pressurized with gas pressure to reduce the capillary rise in the residual moisture remaining in the product.
  • hot gas can first be blown into the pressure chambers 42 with low-pressure surges in order to heat the filter cone and to dry the sticky base layer of the product. After this pre-drying, high-pressure shocks occur, under which the product layer breaks and falls off. At the same time, the filter cone is cleaned from the outside in.
  • hot gas is introduced in pressure surges via the lower nozzle 47 in order to convectively dry the product as an eddy current.
  • the product collected in the lower half of the work area is constantly shifted at low speed, thus accelerating drying.
  • the injected gas exits through the upper half of the cone.

Landscapes

  • Centrifugal Separators (AREA)
EP91106497A 1990-04-26 1991-04-23 Zentrifugen-Trockner Expired - Lifetime EP0454045B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013388 1990-04-26
DE4013388A DE4013388A1 (de) 1990-04-26 1990-04-26 Zentrifugen-trockner

Publications (3)

Publication Number Publication Date
EP0454045A2 EP0454045A2 (de) 1991-10-30
EP0454045A3 EP0454045A3 (en) 1992-01-02
EP0454045B1 true EP0454045B1 (de) 1993-08-04

Family

ID=6405183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106497A Expired - Lifetime EP0454045B1 (de) 1990-04-26 1991-04-23 Zentrifugen-Trockner

Country Status (4)

Country Link
US (1) US5163895A (ja)
EP (1) EP0454045B1 (ja)
JP (1) JP2957750B2 (ja)
DE (2) DE4013388A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903125B4 (de) * 1999-01-27 2006-01-05 Sanofi-Aventis Deutschland Gmbh Verfahren zur Trocknung von Kristallen von Insulin oder Insulinanaloga
CN105916590A (zh) * 2014-01-22 2016-08-31 曼·胡默尔有限公司 自清洁离心分离器

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FR2711076B1 (fr) * 1993-10-13 1995-12-08 Robatel Slpi Dispositif étanche et déformable élastiquement pour le débatissage de la couche résiduelle.
US5743840A (en) * 1996-06-24 1998-04-28 Carr Separations, Inc. Centrifuge with a heating jacket for drying collected solids
DE19635346C1 (de) * 1996-08-31 1998-03-26 Wienicke Heinz Juergen Diskontinuierliche Filterzentrifuge mit einer Trocknungsvorrichtung für das schleuderfeuchte Gut
DE10115381A1 (de) * 2001-03-28 2002-10-24 Heinkel Ag Stülpfilterzentrifuge
US6430842B1 (en) 2001-05-09 2002-08-13 Carter Day International, Inc. Assembly for supporting a rotating structure
DE10245013A1 (de) * 2002-09-20 2004-04-01 Heinkel Aktiengesellschaft Filterzentrifuge
DE10331732A1 (de) 2003-07-11 2005-02-10 Westfalia Separator Ag Zentrifuge
US8075668B2 (en) * 2005-03-29 2011-12-13 Dresser-Rand Company Drainage system for compressor separators
DE102005028825A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Verbesserte Zentrifugenvorrichtung zur Vermeidung von Cross-Kontamination
DE102005028832A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Zentrifugenvorrichtung mit verbesserter Prozessanalysetechnologie
DE102006009200A1 (de) * 2006-02-22 2007-08-30 Fima Maschinenbau Gmbh Verfahren für den Betrieb einer Zentrifuge
DE102007003071A1 (de) * 2007-01-20 2008-07-24 Westfalia Separator Gmbh Verfahren zur Phasentrennung eines Produktes mit einer Zentrifuge und Separator
DE102007038692A1 (de) * 2007-02-28 2008-09-04 Richard Denk Verfahren und Vorrichtung zum kontaminationsfreien Beschicken und Entleeren
AU2007350788B2 (en) * 2007-04-05 2012-07-19 Flsmidth A/S Centrifugal scroll screen apparatus
JP4924466B2 (ja) * 2008-02-21 2012-04-25 株式会社日立プラントテクノロジー 遠心脱水装置
US20100199514A1 (en) * 2009-02-10 2010-08-12 Vermont Organics Reclamation Inc. Optimized apparatus and method for manure management
EP2533905B1 (en) 2010-02-10 2018-07-04 Dresser-Rand Company Separator fluid collector and method
WO2012009159A2 (en) 2010-07-15 2012-01-19 Dresser-Rand Company Radial vane pack for rotary separators
US8673159B2 (en) 2010-07-15 2014-03-18 Dresser-Rand Company Enhanced in-line rotary separator
WO2012012018A2 (en) 2010-07-20 2012-01-26 Dresser-Rand Company Combination of expansion and cooling to enhance separation
US8821362B2 (en) 2010-07-21 2014-09-02 Dresser-Rand Company Multiple modular in-line rotary separator bundle
EP2614216B1 (en) 2010-09-09 2017-11-15 Dresser-Rand Company Flush-enabled controlled flow drain
CN102706110A (zh) * 2012-06-26 2012-10-03 江苏赛德力制药机械制造有限公司 离心干燥机
CN102974472A (zh) * 2012-12-04 2013-03-20 江苏牡丹离心机制造有限公司 一种带有热风烘干装置的卧式螺旋卸料离心机
MX2018000049A (es) * 2015-06-26 2018-03-16 Mi Llc Sistema de limpieza para un secador centrifugo.
CN106076667A (zh) * 2016-08-04 2016-11-09 江苏赛德力制药机械制造有限公司 一种能清除残余滤饼层的离心机转鼓
CN106391330A (zh) * 2016-10-10 2017-02-15 江苏牡丹离心机制造有限公司 一种拉袋离心机
US10814338B2 (en) 2017-08-09 2020-10-27 Delta Separations, Llc Device, system and methods for separation and purification of organic compounds from botanical material
JP2021506576A (ja) * 2017-12-19 2021-02-22 ゼロス リミテッド 処理装置のためのろ過器
CN108889461A (zh) * 2018-09-04 2018-11-27 江苏赛德力制药机械制造有限公司 一种滤饼清除卧式刮刀离心机
CN112742613B (zh) * 2020-12-16 2021-09-17 安徽天祥药业有限公司 一种卧式螺旋沉降离心机

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DE3042948A1 (de) * 1980-11-14 1982-07-08 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter Schubzentrifuge

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903125B4 (de) * 1999-01-27 2006-01-05 Sanofi-Aventis Deutschland Gmbh Verfahren zur Trocknung von Kristallen von Insulin oder Insulinanaloga
CN105916590A (zh) * 2014-01-22 2016-08-31 曼·胡默尔有限公司 自清洁离心分离器
CN105916590B (zh) * 2014-01-22 2019-10-22 曼·胡默尔有限公司 自清洁离心分离器

Also Published As

Publication number Publication date
DE4013388A1 (de) 1991-10-31
EP0454045A3 (en) 1992-01-02
EP0454045A2 (de) 1991-10-30
DE59100241D1 (de) 1993-09-09
JPH04227865A (ja) 1992-08-17
JP2957750B2 (ja) 1999-10-06
US5163895A (en) 1992-11-17

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