EP1258691A1 - Vorrichtung zum Trocknen von Teilchen - Google Patents
Vorrichtung zum Trocknen von Teilchen Download PDFInfo
- Publication number
- EP1258691A1 EP1258691A1 EP02011052A EP02011052A EP1258691A1 EP 1258691 A1 EP1258691 A1 EP 1258691A1 EP 02011052 A EP02011052 A EP 02011052A EP 02011052 A EP02011052 A EP 02011052A EP 1258691 A1 EP1258691 A1 EP 1258691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- baffle
- openings
- dryer unit
- flow
- sectional 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.)
- Granted
Links
Images
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
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/106—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure, e.g. its axis, being substantially straight and horizontal, e.g. pneumatic drum dryers; the drying enclosure consisting of multiple substantially straight and horizontal stretches
-
- 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
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
- F26B17/104—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis with fixed or moving internal bodies for defining or changing the course of the entrained material
Definitions
- the present invention relates to a device for drying in particular chip-like and / or fibrous particles, such as wood chips, Wood fibers or the like, with a dryer unit with at least an inlet opening through which the particles of the dryer unit to be dried can be supplied together with a hot gas stream as a particle stream are, and with at least one outlet opening, through the dried Particles can be removed from the dryer unit, being in the range of Inlet opening a resistance element to increase the flow resistance is provided for the particle flow.
- Drying devices of this type are used, for example, to in the production of chipboard, OSB and the like required particles, e.g. Wood chips or fibers, before the spreading process to dry.
- the drying takes place with the help of a hot gas stream, which is generated, for example, in a combustion chamber, and in which the particles to be dried are given up.
- the particles are together with the hot gas stream of a dryer unit, for example fed to a rotating dryer drum and in the rotating Dryer drum by blades provided inside the drum layered until they are in the desired dry state Leave the dryer drum through its outlet opening and the other Processing to be fed.
- a resistance element is in the area of the inlet opening provided to increase the flow resistance through which the Particle speed reduced within the dryer unit becomes.
- a drying device known as a three-pass section has a feed tube through which the particles together with the hot gas stream are introduced into the dryer unit, the through the inlet opening into the dryer unit feed pipe into a pot-shaped one arranged inside the dryer drum End element protrudes.
- the inside diameter of the pot-shaped End element is larger than the outer diameter of the feed pipe, so that an annular exit gap is formed between them becomes.
- the hot gas flow carrying the particles reverberates Emerging from the feed pipe against the bottom of the closure element, then occurs after a deflection of 180 ° over the annular outlet gap in the dryer drum and will, in turn after a 180 ° deflection, at a reduced speed passed the dryer drum.
- a drying device of the beginning Specify the type mentioned, on the one hand, a more uniform Drying of the particles is achieved and secondly the efficiency drying is increased. Due to the increased efficiency should same hot gas temperatures shortens the length of the dryer drum or the temperature of the same length to be used Hot gas can be reduced.
- the resistance element a variety of staggered in the flow direction arranged, airtight baffle sections, between which each have through openings for the particle flow are, the baffle sections and the through openings to achieve a more even decrease in flow velocity of the particle flow essentially over the entire cross-sectional area the inlet opening are distributed.
- the baffle sections and the through openings essentially over the entire Cross-sectional area of the dryer unit arranged distributed. This is particularly so then essential if the inlet opening is significantly smaller Cross section than the dryer unit has. Through this configuration is achieved that the particle flow over in such a case the entire cross-sectional area of the dryer unit evenly in its Speed is reduced.
- a particularly uniform speed profile of the particle flow to achieve, the baffle sections and the passage openings are advantageous essentially uniform and / or symmetrical about the cross-sectional area of the inlet openings and / or the dryer unit distributed.
- the baffle sections as essentially concentric, especially flat baffle rings formed, which in particular have different diameters.
- the through openings are preferably essentially concentric Ring openings are formed, which are also different Own diameter.
- dryer units that act as dryer drums are formed with a circular cross section the use of impact rings with ring openings formed between them a particularly uniform speed profile of the Particle flow achieved.
- impact rings and ring openings according to the present Registration is not just mathematically exact circular To understand impact sections and openings, but for example also corresponding polygonal configurations, for example 8, 16 or polygonal designs.
- Baffle sections located to the outside of the dryer unit are advantageous offset downstream from internal baffle sections arranged.
- the baffle sections thus form against the flow direction a more or less pronounced convex, for example a conical or pyramidal shape, by which the probability for the formation of turbulence is further reduced.
- Another preferred embodiment of the invention is that of Cross-sectional area of the dryer unit's innermost baffle section full-surface, in particular designed as a circular baffle plate, which is advantageously arranged concentrically to the impact rings. On this prevents the inner area of the particle flow into the dryer unit unhindered at full speed can penetrate.
- the mutually offset impact sections in Flow direction at least partially. This can be done, for example take place that the inner radius of a Baffle ring is smaller than the outer radius of the next smaller one Baffle ring. Reaching behind the individual impact sections ensures that the particle flow is not directly in the flow direction without Speed reduction can penetrate into the dryer unit. By reaching behind it is achieved that with the hot gas flow entrained particles on an upstream impact section were led against a baffle section further downstream hit, reducing their speed.
- Fig. 1 shows the longitudinal section through a dryer drum 1, the one has a circular cross section and is rotatable about its longitudinal axis 2.
- the dryer drum 1 has an inlet opening 3 to which a feed pipe 4 is connected, and an outlet opening 19 for discharging the dried particles.
- a feed pipe 4 Through the feed pipe 4 is a hot gas stream 21 and particles 22 to be dried, existing by arrows 5 schematically represented particle stream of the dryer drum 1 is supplied.
- the open end of the feed pipe 4 opens into a cup-shaped closure element 6, which overlaps the open end of the feed tube 4 and a Resistive element 20 for the particle stream 5 forms. Between the Inner wall of the end element 6 and the outer wall of the feed pipe 4 an annular opening 7 is thereby formed, through which the end of the feed pipe 4 emerging particle stream 5 by two deflections enters the interior of the drying drum 1 by 180 ° according to arrows 8.
- the drying device according to the invention shown in FIG. 2 differs differs only from the drying device according to FIG. 1 the formation of the resistance element 20. Accordingly, in Fig. 1 elements shown in Fig. 2 with the same reference numerals as provided in Fig. 1.
- the resistance element 20 is shown in FIG. 2 by a plurality of in the flow direction staggered, different Diameter baffle rings 12 formed (see also Fig. 3 and 4).
- the baffle rings 12 located in the direction of flow have one larger diameter than those against the flow direction Baffle rings 12 so that the resistance element formed by the baffle rings 12 20 has a substantially conical shape, the tip against the direction of flow through the inlet opening 3 in the Dryer drum 1 flowing particle stream 5 is directed.
- the resistance element is rotated by 180 ° is arranged so that its tip points in the direction of flow.
- the top of the flow resistance is through a circular baffle 13 formed, which can be seen more clearly in FIG. 4.
- baffle rings 12 are spaced in the direction of flow, so that between adjacent baffle rings 12 annular through openings 14 are formed.
- the one extending in the flow direction The width of the through openings 14 is chosen so large that blockage of these through openings 14 by the flow of particles 5 entrained particles 22 is excluded.
- the particle flow 5 by the resistance element 20 sufficient braked because the particle stream 5 that formed by the baffle rings 12 Resistance element 20 cannot penetrate directly in the direction of flow, but strikes the surfaces of the baffle rings 12 and through the through openings 14 deflected radially inwards or outwards as shown by arrows 15.
- the outer radius of a baffle ring 12 located downstream is 2 each larger than the inner radius of the adjacent upstream located baffle rings 12.
- the baffle rings 12 engage behind each other thus in the direction of flow of the particle stream 5, so that ensures is that the particle stream 5 does not contain the resistance element 20 at any point can penetrate without distraction.
- the inner radii of the downstream Baffle rings 12 are larger than the respective outer radius of the upstream located adjacent baffle ring 12 so that a radial distance 17th arises between these impact rings 12.
- the distance 17 must however be chosen so small that despite this distance a sufficient Speed reduction of the particle flow 5 is reached.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Description
- Fig. 1
- einen stark schematisierten Längsschnitt durch eine Trocknungsvorrichtung gemäß dem Stand der Technik,
- Fig. 2
- einen stark schematisierten Längsschnitt durch eine Trocknungsvorrichtung gemäß der Erfindung,
- Fig. 3
- eine Detailansicht nach einer weiteren Ausführungsform der Erfindung und
- Fig. 4
- eine perspektivische Detailansicht der Ausführungsform gemäß Fig. 2.
- 1
- Trocknertrommel
- 2
- Längsachse
- 3
- Einlaßöffnung
- 4
- Zuführrohr
- 5
- Partikelstrom
- 6
- Abschlußelement
- 7
- Ringöffnung
- 8
- Pfeile
- 9
- Außenwand
- 10
- Windschatten
- 11
- Innenbereich
- 12
- Prallringe
- 13
- Prallscheibe
- 14
- Durchgangsöffnungen
- 15
- Pfeile
- 16
- gestrichelte Linie
- 17
- Abstand
- 18
- Windschattenbereich
- 19
- Auslaßöffnung
- 20
- Widerstandselement
- 21
- Heißgasstrom
- 22
- Teilchen
- 23
- Außenbereich
- 24
- Pfeile
Claims (12)
- Vorrichtung zum Trocknen von insbesondere spanartigen und/oder faserigen Teilchen (22), wie Holzspänen, Holzfasern oder dergleichen, mit einer Trocknereinheit (1) mit zumindest einer Einlaßöffnung (3), durch die die zu trocknenden Teilchen (22) der Trocknereinheit (1) zusammen mit einem Heißgasstrom (21) als Partikelstrom (5) zuführbar sind, und mit zumindest einer Auslaßöffnung (19), durch die die getrockneten Teilchen aus der Trocknereinheit (1) abführbar sind, wobei im Bereich der Einlaßöffnung (3) ein Widerstandselement (20) zur Erhöhung des Strömungswiderstands für den Partikelstrom (5) vorgesehen ist,
dadurch gekennzeichnet, daß das Widerstandselement (20) eine Vielzahl von in Strömungsrichtung versetzt zueinander angeordneten, luftundurchlässigen Prallabschnitten (12, 13) umfaßt, zwischen denen jeweils Durchgangsöffnungen (14) für den Partikelstrom (5) ausgebildet sind, wobei die Prallabschnitte (12, 13) und die Durchgangsöffnungen (14) zur Erzielung einer gleichmäßigen Verringerung der Strömungsgeschwindigkeit des Partikelstroms (5) im wesentlichen über die gesamte Querschnittsfläche der Einlaßöffnung (3) verteilt angeordnet sind. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Prallabschnitte (12, 13) und die Durchgangsöffnungen (14) im wesentlichen über die gesamte Querschnittsfläche der Trocknereinheit (1) verteilt angeordnet sind. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Prallabschnitte (12, 13) und die Durchgangsöffnungen (14) im wesentlichen gleichmäßig über die Querschnittsfläche der Einlaßöffnung (3) und/oder der Trocknereinheit (1) verteilt angeordnet sind. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Prallabschnitte (12, 13) und/oder die Durchgangsöffnungen (14) im wesentlichen symmetrisch über die Querschnittsfläche der Einlaßöffnung (3) und/oder der Trocknereinheit (1) verteilt angeordnet sind. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Prallabschnitte als im wesentlichen konzentrische, insbesondere flache Prallringe (12) ausgebildet sind, die insbesondere unterschiedliche Durchmesser besitzen. - Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß zumindest für einen Teil der Prallringe (12) der Innenradius eines Prallrings (12) kleiner ist als der Außenradius (13) des jeweils nächstkleineren Prallrings. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Durchgangsöffnungen (14) als im wesentlichen konzentrische Ringöffnungen ausgebildet sind, die insbesondere unterschiedliche Durchmesser besitzen. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß zur Außenseite (9) der Trocknereinheit (1) hin gelegene Prallabschnitte (12) gegenüber innenliegenden Prallabschnitten (12, 13) flußabwärts versetzt angeordnet sind. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der bezüglich der Querschnittsfläche der Trocknereinheit (1) am weitesten innenliegende Prallabschnitt vollflächig, insbesondere als kreisförmige Prallscheibe (13) ausgebildet ist, die vorteilhaft konzentrisch zu den Prallringen (12) angeordnet ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß sich die gegeneinander versetzt angeordneten Prallabschnitte (12, 13) in Flußrichtung zumindest teilweise hintergreifen. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Querschnittsfläche der Einlaßöffnung (3) kleiner ist als die Querschnittsfläche der Trocknereinheit (1). - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Trocknereinheit als insbesondere rotierende Trocknertrommel (1) ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10124406 | 2001-05-18 | ||
DE10124406A DE10124406A1 (de) | 2001-05-18 | 2001-05-18 | Vorrichtung zum Trocknen von Teilchen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1258691A1 true EP1258691A1 (de) | 2002-11-20 |
EP1258691B1 EP1258691B1 (de) | 2007-08-15 |
Family
ID=7685373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02011052A Expired - Lifetime EP1258691B1 (de) | 2001-05-18 | 2002-05-17 | Vorrichtung zum Trocknen von Teilchen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1258691B1 (de) |
AT (1) | ATE370376T1 (de) |
DE (2) | DE10124406A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4230938A1 (de) * | 2022-02-17 | 2023-08-23 | G. Larsson Starch Technology AB | Trocknungssystem und verfahren zum trocknen eines produkts |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2017586A (en) * | 1933-05-31 | 1935-10-15 | Cottee Clifford Hethring Frank | Dehydrating glauber's salt and the like |
FR1072522A (fr) * | 1951-12-24 | 1954-09-14 | Miag Mu Hlenbau Und Ind G M B | Procédé et dispositif pour le séchage et le refroidissement ou le séchage ou le refroidissement de matières en vrac, transportées par voie pneumatique |
US2847766A (en) * | 1954-11-05 | 1958-08-19 | Silver Eng Works | Drier |
DE1084648B (de) * | 1955-07-12 | 1960-06-30 | Optimum A G | Verfahren zur Erhoehung der Gutverweilzeit im Stromtrockner durch Bremselemente und Trockner dazu |
DE1778768A1 (de) * | 1968-06-01 | 1972-03-02 | Kloeckner Humboldt Deutz Ag | Vorrichtung zum Trocknen von schlammfoermigen Medien |
DE2120482A1 (de) * | 1971-04-27 | 1972-11-02 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Verfahren und Vorrichtung zur chemischen und/oder physikalischen Behandlung von feinkörnigem Gut |
FR2312473A1 (fr) * | 1975-05-30 | 1976-12-24 | Archimbaud Georges | Machine pour la deshydratation et la granulation de matieres vegetales organiques, destinee plus particulierement au traitement de fumier |
GB1581542A (en) * | 1977-05-26 | 1980-12-17 | Worsley & Co Ltd G P | Drying equipment |
-
2001
- 2001-05-18 DE DE10124406A patent/DE10124406A1/de not_active Withdrawn
-
2002
- 2002-05-17 EP EP02011052A patent/EP1258691B1/de not_active Expired - Lifetime
- 2002-05-17 AT AT02011052T patent/ATE370376T1/de not_active IP Right Cessation
- 2002-05-17 DE DE50210675T patent/DE50210675D1/de not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2017586A (en) * | 1933-05-31 | 1935-10-15 | Cottee Clifford Hethring Frank | Dehydrating glauber's salt and the like |
FR1072522A (fr) * | 1951-12-24 | 1954-09-14 | Miag Mu Hlenbau Und Ind G M B | Procédé et dispositif pour le séchage et le refroidissement ou le séchage ou le refroidissement de matières en vrac, transportées par voie pneumatique |
US2847766A (en) * | 1954-11-05 | 1958-08-19 | Silver Eng Works | Drier |
DE1084648B (de) * | 1955-07-12 | 1960-06-30 | Optimum A G | Verfahren zur Erhoehung der Gutverweilzeit im Stromtrockner durch Bremselemente und Trockner dazu |
DE1778768A1 (de) * | 1968-06-01 | 1972-03-02 | Kloeckner Humboldt Deutz Ag | Vorrichtung zum Trocknen von schlammfoermigen Medien |
DE2120482A1 (de) * | 1971-04-27 | 1972-11-02 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Verfahren und Vorrichtung zur chemischen und/oder physikalischen Behandlung von feinkörnigem Gut |
FR2312473A1 (fr) * | 1975-05-30 | 1976-12-24 | Archimbaud Georges | Machine pour la deshydratation et la granulation de matieres vegetales organiques, destinee plus particulierement au traitement de fumier |
GB1581542A (en) * | 1977-05-26 | 1980-12-17 | Worsley & Co Ltd G P | Drying equipment |
Also Published As
Publication number | Publication date |
---|---|
DE50210675D1 (de) | 2007-09-27 |
EP1258691B1 (de) | 2007-08-15 |
ATE370376T1 (de) | 2007-09-15 |
DE10124406A1 (de) | 2002-11-21 |
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