EP1141643A1 - Centrifugal dehydrator - Google Patents
Centrifugal dehydratorInfo
- 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
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.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19900042A DE19900042A1 (en) | 1999-01-04 | 1999-01-04 | Centrifugal dehumidifier |
DE19900042 | 1999-01-04 | ||
PCT/EP2000/000006 WO2000040911A1 (en) | 1999-01-04 | 2000-01-03 | Centrifugal dehydrator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1141643A1 true EP1141643A1 (en) | 2001-10-10 |
EP1141643B1 EP1141643B1 (en) | 2003-04-16 |
Family
ID=7893551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00901054A Expired - Lifetime EP1141643B1 (en) | 1999-01-04 | 2000-01-03 | Centrifugal dehydrator |
Country Status (4)
Country | Link |
---|---|
US (1) | US6655039B2 (en) |
EP (1) | EP1141643B1 (en) |
DE (2) | DE19900042A1 (en) |
WO (1) | WO2000040911A1 (en) |
Families Citing this family (12)
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 (en) * | 2003-04-10 | 2004-11-04 | Nec Electronics Corp | Semiconductor integrated circuit device |
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 (en) * | 2006-07-20 | 2008-06-25 | 曹永良 | Rotor of centrifugal spin dryer |
ATE532615T1 (en) * | 2006-09-20 | 2011-11-15 | Econ Maschb Und Steuerungstechnik Gmbh | DEVICE FOR DEWATERING AND DRYING SOLIDS, IN PARTICULAR UNDERWATER GRANULATED PLASTIC |
US9925694B2 (en) | 2009-02-24 | 2018-03-27 | Gala Industries, Inc. | Continuous bagging processes and systems |
CN102333701B (en) * | 2009-02-24 | 2014-01-15 | 戈拉工业公司 | Continuous bagging processes and systems |
MX2011008927A (en) * | 2009-06-22 | 2012-07-30 | Gala Inc | Continuous pelletizing, drying and bagging systems with improved throughput. |
DE102010032350A1 (en) * | 2010-07-27 | 2012-02-02 | Automatic Plastics Machinery Gmbh | Device for drying granules |
CN102519226A (en) * | 2011-12-28 | 2012-06-27 | 洛阳中原矿山机械制造有限公司 | Centrifugal dehydrator |
CN109163511B (en) * | 2018-08-10 | 2020-05-19 | 南京永杰化工机械制造有限公司 | Plastic particle centrifugal dehydration device |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE195374C (en) | ||||
DE148620C (en) * | 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 (en) * | 1960-11-16 | 1965-09-23 | Muehlen Und Naehrmittelwerke H | Cylindrical dryer for solid-liquid mixtures |
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 (en) | 1978-05-03 | 1986-11-20 | Gala Industries, Inc., Virginia | Rotor for a centrifugal separator |
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 (en) * | 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 |
-
1999
- 1999-01-04 DE DE19900042A patent/DE19900042A1/en not_active Withdrawn
-
2000
- 2000-01-03 EP EP00901054A patent/EP1141643B1/en not_active Expired - Lifetime
- 2000-01-03 US US09/897,452 patent/US6655039B2/en not_active Expired - Lifetime
- 2000-01-03 WO PCT/EP2000/000006 patent/WO2000040911A1/en active IP Right Grant
- 2000-01-03 DE DE50001785T patent/DE50001785D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0040911A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1141643B1 (en) | 2003-04-16 |
US6655039B2 (en) | 2003-12-02 |
US20020014019A1 (en) | 2002-02-07 |
WO2000040911A1 (en) | 2000-07-13 |
DE19900042A1 (en) | 2000-07-06 |
DE50001785D1 (en) | 2003-05-22 |
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