EP1141643A1 - Deshydrateur centrifuge - Google Patents

Deshydrateur centrifuge

Info

Publication number
EP1141643A1
EP1141643A1 EP00901054A EP00901054A EP1141643A1 EP 1141643 A1 EP1141643 A1 EP 1141643A1 EP 00901054 A EP00901054 A EP 00901054A EP 00901054 A EP00901054 A EP 00901054A EP 1141643 A1 EP1141643 A1 EP 1141643A1
Authority
EP
European Patent Office
Prior art keywords
hollow body
centrifugal dehumidifier
rotor
dehumidifier according
liquid
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
EP00901054A
Other languages
German (de)
English (en)
Other versions
EP1141643B1 (fr
Inventor
Günther Hultsch
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 EP1141643A1 publication Critical patent/EP1141643A1/fr
Application granted granted Critical
Publication of EP1141643B1 publication Critical patent/EP1141643B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/24—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by shooting or throwing the materials, e.g. after which the materials are subject to impact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment

Definitions

  • the invention relates to a device for a centrifugal dehumidifier for separating and dehumidifying granules according to the preamble of claim 1.
  • Centrifugal dehumidifiers are used, for example, to dehumidify plastic granules. It is important that the process rooms are easy to clean, because when changing the granulate color or
  • Sort the mixing of granules or fragments of the previous with the new batch must be avoided. Long service life of the apparatus parts, low abrasion of the granules to be dehumidified and low noise emissions are also important.
  • the suspension of granules and liquid is continuously fed to the lower area of the centrifugal dehumidifier, specifically into the space between the rotor and the hollow body formed from sieves. It is detected by the co-rotating conveyor blades of the rotor, which are both an upward transport impulse and
  • the granules are transported upwards as well as tossed back and forth between the sieves and the conveyor blades, while the liquid separated from the granules passes through the sieves and is drained off through the outlet connection of the housing that receives the centrifugal dehumidifier.
  • Centrifugal dehumidifiers of this type have proven themselves in principle.
  • a disadvantage is the contamination of the sieves with fragments of the granules, so that these sieves have to be dismantled, cleaned or replaced before each change of color or type.
  • sieves wear out relatively heavily, are easily damaged when they are changed frequently and generate abrasion on the granules to be dehumidified. They are therefore unsuitable for dehumidifying extremely abrasive granules, such as plastic granules filled with glass fibers.
  • the sound emitted by the impact of the granules on the sieves is also considerable.
  • the outer housing of such centrifugal dehumidifiers can be insulated against excessive noise emissions, this insulation is complex because the accessibility of the sieves requires closable openings, such as folding doors, etc., on the housings.
  • the invention has for its object to provide a centrifugal dehumidifier that reduces the abrasion of the granules.
  • an essential part preferably at least in the upper region of the hollow body, is designed as an unperforated jacket.
  • the liquid separated from the granules spirally flows downwards on the inner wall of the unpunched jacket under the influence of centrifugal and gravitational acceleration.
  • the unperforated coat with its smooth inner surfaces causes little wear.
  • the unperforated jacket causes little sound, so that the hollow body, where it is designed as an unperforated jacket, can simultaneously serve as an outer housing.
  • the lower region of the hollow body is preferably equipped with sieve segments, or the hollow body is completely designed as an unperforated jacket with a sieve in the lower region of the hollow body.
  • the main advantage of the invention is that, if at all, only small sieve surfaces have to be cleaned or replaced before a dye or grade change. Granule residues adhering to smooth walls can easily be rinsed off with the aid of washing nozzles or by flooding the entire process space, whereas they are in sieve holes wedge.
  • the elimination, at least in part, of an outer housing enclosing the process space reduces the costs.
  • FIG. 1 shows a partial longitudinal section through a centrifugal dehumidifier, the rotor of which is enclosed only in the lower region by a screen jacket with an outer housing.
  • FIG. 2 shows a top view of the centrifugal dehumidifier according to FIG. 1.
  • Figure 3 shows a partial longitudinal section through a centrifugal dehumidifier, the hollow body surrounding the rotor is completely formed as an unperforated jacket.
  • the shaft (5) of the rotor (1) of a centrifugal dehumidifier is rotatably mounted in a bearing housing (2) and via a pulley (3) by a motor (4) shown in Figure 2 in rotation removable.
  • the rotor (1) consists of a pot (6) enclosing the bearing housing (2), on which several holders (7) for the lower conveyor blades (8) are mounted, as well as an intermediate disc (9) and an upper disc (10) to. Attachment of the middle and upper holders (11, 12) for the middle and upper conveyor blades (13, 14).
  • the pot (6) of the rotor (1) is coaxially enclosed by fixed sieve segments (15) and a filling shaft (16) which are attached to a cubic outer housing (17) which is equipped with at least one removable or hinged plate (18) for screen installation, an outlet nozzle (19) and an air blow-off pipe (20) is provided.
  • the upper area of the rotor (1) is encased on the outer housing (17). flanged, frustoconically widened, unperforated jacket (21) with a granulate discharge nozzle (22) which is closed by a cover (23) with an air intake grate (24), a filter mat (25) and a support grid (26) .
  • FIG. 3 shows a centrifugal dehumidifier whose rotor (28) equipped with conveyor blades (27) and designed as a closed hollow body is completely enclosed by an unperforated jacket (29) which has a cylindrical / conical shape.
  • the motor (30) coupled directly to the rotor (28) is flanged onto the cover (31).
  • the lid
  • the lower shaft (35) of the rotor (28) is rotatably supported in a bearing housing (34) which is located in the base (33).
  • the drain shaft (38) carries an air blow-off pipe (39) and has a vertical pipe (40) which dips into the flow container (41) with a siphon (42).
  • a sieve (43) can be attached between the unperforated jacket (29) and the drain shaft (38).
  • the filling shaft (16) is continuously loaded with suspension.
  • the liquid is thrown into the outer housing (17) in the lower area against the sieve segments (15). In the unperforated jacket (21), it flows downward in a spiral along its inner wall until it likewise flows through the sieve segments (15). All of the liquid leaves the centrifugal dehumidifier through the outlet connection (19). Air sucked in through the cover (23) is partly blown off with the granules, partly through the air blow-off pipe (20). A suction fan can be connected to the air blow-off pipe (20) to increase the air flow.
  • the method of operation of the centrifugal dehumidifier according to FIG. 3 differs from that according to FIGS. 1 and 2 in that the rotor is completely enclosed by an unperforated jacket (29), so that all the liquid flows downwards on its inner wall and, if present , the relatively small sieve (43) passes in front of the downcomer (38).
  • the vertical pipe (40) of the downcomer plunges into the liquid level of the flow container (41) with a siphon (42). This arrangement is provided in the event that a suction fan is connected to the air blow-off pipe (39).
  • the area of the small sieve (43) is sufficient in particular if the liquid fraction of the suspension supplied is low.
  • the outlet shaft (38) of a centrifugal dehumidifier according to FIG. 3 can be designed such that the sieve (43) can be opened is interchangeable in a few simple steps. It is also possible to completely dispense with the sieve (43) and to recirculate the outflowing liquid, in which some granules may be contained, into an upstream thickener. Suspensions from liquids and granules are easily thickened, the sieves of static thickeners are hardly prone to clogging, are easy to clean and are more accessible than the sieves of centrifugal dehumidifiers, which may only be opened under safety measures.
  • the non-perforated jacket (21, 29) can also be cylindrical throughout.
  • the liquid flows off the inner wall of a cylinder more slowly than in a cone that is widened downwards, but ultimately it is the cost that decides which form of the jacket and the rotor (1, 28) is more appropriate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Centrifugal Separators (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un déshydrateur centrifuge servant à séparer et à déshydrater des granulés dans une suspension, dans lequel un rotor équipé d'aubes transporteuses et disposé verticalement dans une enveloppe externe afin de recueillir le liquide est entouré coaxialement d'un corps creux constitué d'éléments tamis. La suspension de granulés et de liquide est introduite en continu dans la zone inférieure de l'espace situé entre le corps creux et le rotor. Les aubes transporteuses tournant avec le rotor font remonter les granulés qui sont projetés entre les aubes transporteuses et les tamis et déshydratés. Les granulés déshydratés sont rejetés à l'extrémité supérieure du rotor. Le liquide séparé des granulés passe à travers le bol perforé et s'écoule du tuyau d'évacuation de l'enveloppe externe. Dans le déshydrateur centrifuge selon l'invention, le corps creux entourant le rotor (1, 28) équipé d'aubes transporteuses (8, 13, 12, 27) ne comporte d'éléments tamis (15) que dans sa zone inférieure ou même pas du tout, mais est constitué d'une gaine sans trous (21, 29) sur la paroi interne de laquelle le liquide séparé s'écoule vers le bas en spirale. L'enveloppe externe (17) devient donc inutile dans la zone de la gaine sans trous.
EP00901054A 1999-01-04 2000-01-03 Deshydrateur centrifuge Expired - Lifetime EP1141643B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19900042 1999-01-04
DE19900042A DE19900042A1 (de) 1999-01-04 1999-01-04 Fliehkraft-Entfeuchter
PCT/EP2000/000006 WO2000040911A1 (fr) 1999-01-04 2000-01-03 Deshydrateur centrifuge

Publications (2)

Publication Number Publication Date
EP1141643A1 true EP1141643A1 (fr) 2001-10-10
EP1141643B1 EP1141643B1 (fr) 2003-04-16

Family

ID=7893551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00901054A Expired - Lifetime EP1141643B1 (fr) 1999-01-04 2000-01-03 Deshydrateur centrifuge

Country Status (4)

Country Link
US (1) US6655039B2 (fr)
EP (1) EP1141643B1 (fr)
DE (2) DE19900042A1 (fr)
WO (1) WO2000040911A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6467188B1 (en) * 2000-10-10 2002-10-22 The Conair Group, Inc. Centrifugal pellet dryer apparatus
JP2004311858A (ja) * 2003-04-10 2004-11-04 Nec Electronics Corp 半導体集積回路装置
US6938357B2 (en) 2003-09-09 2005-09-06 Carter Day International, Inc. Forced air circulation for centrifugal pellet dryer
US8079158B2 (en) * 2004-09-02 2011-12-20 Grupo Petrotemex, S.A. De C.V. Process for separating and drying thermoplastic particles under high pressure
CN100397014C (zh) * 2006-07-20 2008-06-25 曹永良 离心甩干机的转子
ATE532615T1 (de) * 2006-09-20 2011-11-15 Econ Maschb Und Steuerungstechnik Gmbh Vorrichtung zum entwässern und trocknen von feststoffen, insbesondere von unterwassergranulierten kunststoffen
SG173604A1 (en) * 2009-02-24 2011-09-29 Gala Inc Continuous bagging processes and systems
US9925694B2 (en) 2009-02-24 2018-03-27 Gala Industries, Inc. Continuous bagging processes and systems
CA2752086C (fr) * 2009-06-22 2017-05-16 Gala Industries, Inc. Systemes de pastillage, de sechage et d'ensachage en continu a rendement ameliore
DE102010032350A1 (de) * 2010-07-27 2012-02-02 Automatic Plastics Machinery Gmbh Vorrichtung zur Trocknung von Granulatkörnern
CN102519226A (zh) * 2011-12-28 2012-06-27 洛阳中原矿山机械制造有限公司 离心脱水机
CN109163511B (zh) * 2018-08-10 2020-05-19 南京永杰化工机械制造有限公司 一种塑料粒子离心脱水装置

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DE195374C (fr)
DE148620C (fr) * 1902-03-27
US1510693A (en) * 1921-02-16 1924-10-07 Pulverized Coal Equipment Corp Pulverized-coal-burning apparatus
US2727631A (en) * 1952-10-07 1955-12-20 Mcnally Pittsburg Mfg Corp Centrifugal drier
DE1201773B (de) * 1960-11-16 1965-09-23 Muehlen Und Naehrmittelwerke H Zylindrischer Trockner fuer Feststoff-Fluessigkeits-Gemische
US3194492A (en) * 1962-06-28 1965-07-13 Richard A Koffinke Pressurized centrifuge
GB1047155A (en) * 1964-05-04 1966-11-02 May Fran Mfg Co Improvements in apparatus for drying metal scrap
US3458045A (en) * 1966-08-26 1969-07-29 Gala Inc Centrifugal pellet drier
US3399773A (en) * 1967-04-14 1968-09-03 Read Ivan Jay Apparatus for separating solids from liquids
DE2819443C2 (de) 1978-05-03 1986-11-20 Gala Industries, Inc., Virginia Rotor für einen Fliehkraftabscheider
CH663273A5 (en) * 1984-12-18 1987-11-30 Fershan Holding S A Method of continuous drying of a powdered substance and apparatus for implementing it
US5321898A (en) * 1992-06-19 1994-06-21 Decanter Machine, Inc. Centrifugal screen bowl dryer
US5265347A (en) * 1992-09-04 1993-11-30 Gala Industries, Inc. Centrifugal pellet dryer
TW317508B (fr) * 1994-08-10 1997-10-11 Kanei Masao
US5611150A (en) * 1996-05-23 1997-03-18 The Conair Group, Inc. Centrifugal pellet dryer
US6033577A (en) * 1998-05-18 2000-03-07 Dravo Lime Company Coordination of liquid-solid separators and fluid tanks

Non-Patent Citations (1)

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Title
See references of WO0040911A1 *

Also Published As

Publication number Publication date
EP1141643B1 (fr) 2003-04-16
WO2000040911A1 (fr) 2000-07-13
US6655039B2 (en) 2003-12-02
US20020014019A1 (en) 2002-02-07
DE50001785D1 (de) 2003-05-22
DE19900042A1 (de) 2000-07-06

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