DE1010460B - Fluid bed dryer subdivided into pre-dryer and finished dryer - Google Patents

Fluid bed dryer subdivided into pre-dryer and finished dryer

Info

Publication number
DE1010460B
DE1010460B DEO3243A DEO0003243A DE1010460B DE 1010460 B DE1010460 B DE 1010460B DE O3243 A DEO3243 A DE O3243A DE O0003243 A DEO0003243 A DE O0003243A DE 1010460 B DE1010460 B DE 1010460B
Authority
DE
Germany
Prior art keywords
dryer
finished
fluid bed
subdivided
fluidized bed
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.)
Pending
Application number
DEO3243A
Other languages
German (de)
Inventor
Hermann Orth
Eugen Haag
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
Priority to DEO3243A priority Critical patent/DE1010460B/en
Publication of DE1010460B publication Critical patent/DE1010460B/en
Pending 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
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
    • F26B3/0923—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by mechanical means, e.g. vibrated plate, stirrer

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Description

In Vor- und Fertigtrockner unterteilter Wirbelbetttrockner Die Erfindung betrifft einen in Vor- und Fertigtrockner unterteilten Wirbelbetttrockner. Wirbe-Ibetttrockner sind als gegebenenfalls in Zonen unterteilte Tunneltrockner oder in Form zylindrischer Gehäuse bekannt. Bei den Tunneltrocknern wird eine kontinuierliche Beschickung durch schräge Anordnung des Siebbodens und/oder durch Gleichstromführung von Gut und Bebandlungsmjitteil ermöglicht. Die zylindrischen Wirbelbetttrockner werden vorwiegend intermittrierend beschickt, da bei kontinuierlicher Beschickung ein Abziehen sämtLicher Gutsteilchen nach gleicher Verweilzeit nicht sichergestellt werden kann. Es besteht somit-Gefahr, daß einige anfangs aufgegebenen Gutsteile überhaupt nicht aus dem zylindrischen Gehäuse austreten. Dadurch ergeben sich Gutsübertrocknungen bzw. -verbrennungen und gegebenenfalls sogar der Verderb des ganzen Trocknerinhalts.Fluid bed dryer subdivided into pre-dryers and finished dryers. The invention relates to a fluidized bed dryer divided into pre-dryers and finished dryers. Fluidized bed dryer are as tunnel dryers optionally subdivided into zones or in the form of cylindrical ones Housing known. In the case of the tunnel dryers, continuous loading is used Inclined arrangement of the sieve bottom and / or by direct current flow of material and treatment part enables. The cylindrical fluid bed dryers are predominantly intermittent loaded, since all good particles are drawn off with continuous loading cannot be ensured after the same dwell time. There is therefore a risk that some good parts that were initially given up are not at all out of the cylindrical Exit housing. This results in overdrying or burning of the property and possibly even spoilage of the entire contents of the dryer.

Die Hintereinanderschaltung von Vor- und Fertigtrockner ist an sich boi verschiedenen Trocknertypen bekannt. Es war jedoch aus den vorstehend genannten Gründen bisher nicht möglich, einen zylindrischen Wirbelbetttrockner für gegen Übertrocknen empfindliches Gut als Vortrockner zu verwenden. Bei der neuen Einrichtung wird das durch die Anordnung der Gutaufgabe- und Gutab-gabestelle im Vortrockner und durch die Aufeinanderabstimmung der Behandlungsmitteldrücke im Vor- und Fertigtrockner ermöglicht.The series connection of pre-dryer and finished dryer is in itself different types of dryers are known. However, it was out of the above Reasons not previously possible to use a cylindrical fluidized bed dryer for against overdrying to use sensitive goods as a pre-dryer. With the new facility that will through the arrangement of the goods loading and unloading points in the pre-dryer and through the coordination of the treatment agent pressures in the pre-dryer and finished dryer enables.

Die neue Einrichtung ist demnach ein in Vor- und Fertigtrockner unterteilter Wirbelbetttrockner. Die Erfindung wird darin gesehen, daß der Trocknungstnitteldruck in einem zylindrischen Wirbelbettvortrockner mit stetiger Gutaufgabe an einer Seite und stetigem Gutübertritt an der gegenüberliegenden Seite zum als Wirbelbettunnel ausgebildeten Fertigtrockner und der Trocknungsmitteldruck im Fertigtrockner so aufeinander abgestimmt werden, daß vom Fertigtrockner aus über die Gutübertrittstelle auf den Vortrockner ein Sog, der ,die Gutförderung im Vortrockner bewirkt, ausgeübt wird. Es wird so bei der neuen Einrichtung .durch das gleiche Strömungsmittel, das das Wirbelbett hervorruft, auch die Überfübrung des Guts vom Vortrockner in den Fertigtrockner bewirkt.The new facility is therefore divided into pre-dryers and finished dryers Fluid bed dryer. The invention is seen in the fact that the desiccant pressure in a cylindrical fluidized bed predryer with constant material feed on one side and constant material transfer on the opposite side to the fluidized bed tunnel trained finished dryer and the desiccant pressure in the finished dryer so be coordinated that from the finished dryer via the material transfer point on the pre-dryer a suction that causes the material to be conveyed in the pre-dryer is exerted will. It will do so with the new facility .by the same fluid that the fluidized bed causes the transfer of the material from the pre-dryer to the Finished dryer causes.

Um Gutfestsetzungen auf dem Siebboden des Vortrockners zu verhindern, kann über diesem ein Rübrer umlaufen.In order to prevent material from sticking to the sieve bottom of the pre-dryer, a Rübrer can run around over this.

In der Zeichnung ist die neue Vorrichtung in einem Aus.führungsbeispiiel dargestellt. Es bedeutet 1 das zylindrische Gehäuse des Vortrockners. Es hat den bekannten Zwischenboden 2, der gasdurchlässig sein muß und dessen Öffnungen so zu wählen sind, daß das zu trocknende Gut nicht durchfällt, der Trocknungsgaisstrom aber ungehindert hindurchtreten kann. Mit geringem Abstand über diesem Zwischenbaden ist ein Rührwerk 3 in an sich bekannter Weise angeordnet, 4 ist der Aufgabetrichter für das zu trocknende, Gut, 5 eine Ausl-a.ßleiitung für die rnit Feuchtigkeit beilagenen, durch den Zwischenboden 2 eintretenden Trocknun.gsgase, die in das Gehäuse 1 durch das Ventil 6 eintreten können. Zwischen diesem Vortrockner und dem Fertigtrockner 8 ist eine Schleuse 7 vorgesehen, die zur Regelung der Abflußmenge des Gutes aus dem Vortrockner in den Fertigtrockner dient. Durch entsprechende Schaltung-des Ventils 6 wird es möglich, die Intensität des vom Gebläse 14 geforderten Trocknu:ngsgasstromes so zu regeln, daß er mit verschiedenen Überdrucken in den Vor- und Nachtrockner geführt wird und so ein Sog vom Nachtrockner auf den Vortrockner ausgeübt wird. Das gesamte Trocknungssystem ist geschlossen, da zum Ein-und Austragen des Gutes Schleusen 15, 16 und 13 vorgesehen sind und nur über den Zyklon 11 eine Luftabführung durch den Stutzen 12 möglich ist. Die Abluft aus dem Vor- bzw. Nachtrockner geht über die Schieber 9 bzw. 10 und die Leitung 5 in den Zyklon 11, in dem das Feingut aus dem Luftstrom ausgeschieden wird, während das Grobgut bei 16 ausgebracht wird.In the drawing, the new device is shown in an exemplary embodiment shown. 1 means the cylindrical housing of the pre-dryer. It has that known intermediate floor 2, which must be permeable to gas and its openings so too must be chosen so that the material to be dried does not fall through, the drying gas flow but can pass through unhindered. At a short distance above this intermediate bathing an agitator 3 is arranged in a manner known per se, 4 is the feed hopper for the goods to be dried, 5 an outlet line for the moisture enclosed, through the intermediate floor 2 entering Trocknun.gsgase, which in the housing 1 through the valve 6 can enter. Between this pre-dryer and the finished dryer 8 a lock 7 is provided, which is used to regulate the flow rate of the goods serves as the pre-dryer in the finished dryer. By switching the valve accordingly 6 it is possible to adjust the intensity of the drying gas flow required by the fan 14 to be regulated in such a way that it enters the pre-dryer and post-dryer with different overprints and so a suction is exerted from the after-dryer on the pre-dryer. The entire drying system is closed because the goods are fed in and out Locks 15, 16 and 13 are provided and an air discharge only via the cyclone 11 through the nozzle 12 is possible. The exhaust air from the pre- and post-dryer goes via the slide 9 or 10 and the line 5 into the cyclone 11, in which the fine material is excreted from the air stream, while the coarse material is applied at 16.

Die neue Einrichtung ist besonders vorteilhaft bei chemischen Produkten, die mit einem größeren Feuohtigkeitsgefialt, etwa 14 bis 40%, anfallen. Es ist möglich, derartige Produkte zu ein= Feuchtigkeitsgehalt von 0,1% bei 15% Anfangsfeuchtigkeit binnen 2 bis 3 Minuten zu bringen.The new facility is particularly beneficial for chemical products, which occur with a higher level of liquidity, around 14 to 40%. It is possible, such products to a = moisture content of 0.1% at 15% initial moisture to bring within 2 to 3 minutes.

Claims (2)

P.1TENTANSPRÜCHE: 1. In Vor- und Fertigtrockner unterteilter Wirbelbetttrockner,dadurch gekennzeichnet, daß der Trocknungsmitteldruck in einem zylindrischem Wirbelbettvartrockner mit stetiger Gutaufgabe an einer Seite und stetigem Gutübertritt an der gegenüberliegenden Seite zum als Wirbelbetttunnel ausgebildeten Fertigtrockner und der Trocknungsmitteldruck im Fertigtrockner so aufeinander abgestimmt werden., daß vom Fertigtrockner aus über ,diel Gutübertrittstelle auf den Vortrockner ein Sog, der diel Gutförderung im Vortrockner bew@ikt, ausgeübt wird. P.1TENT CLAIMS: 1. Fluid bed dryer divided into pre-dryer and finished dryer, thereby marked that the desiccant pressure in a cylindrical Fluidized bed vario dryer with constant material feed on one side and constant material transfer on the opposite side to the prefabricated dryer designed as a fluidized bed tunnel and the desiccant pressure in the finished dryer are coordinated with one another., that from the finished dryer over, the material transfer point to the pre-dryer Suction, which causes the material to be conveyed in the pre-dryer, is exerted. 2. Wirbelbetttrockner nach Anspruch 1, gekennzeichnet .durch einen umlaufenden Rührer unmittelbar über dem Siebboden des Vortrockners. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 89 238, 444847, 473 364, 606 891, 620 572, 641457, 649 755; britische Patentschrift Nr. 178 636; USA.-Patentschriften Nr. 2 529 366, 2 586 818; französische Patentschrift Nr. 657 439.2. Fluid bed dryer according to claim 1, characterized by a rotating stirrer directly above the sieve bottom of the pre-dryer. Publications considered: German Patent Specifications No. 89 238, 444847, 473 364, 606 891, 620 572, 641457, 649 755; British patent specification No. 178 636; U.S. Patent Nos. 2,529,366, 2,586,818; French patent specification No. 657 439.
DEO3243A 1953-10-21 1953-10-21 Fluid bed dryer subdivided into pre-dryer and finished dryer Pending DE1010460B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO3243A DE1010460B (en) 1953-10-21 1953-10-21 Fluid bed dryer subdivided into pre-dryer and finished dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO3243A DE1010460B (en) 1953-10-21 1953-10-21 Fluid bed dryer subdivided into pre-dryer and finished dryer

Publications (1)

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DE1010460B true DE1010460B (en) 1957-06-13

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DE (1) DE1010460B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182153B (en) * 1962-04-05 1964-11-19 Metallgesellschaft Ag Method and device for drying granules
US3711962A (en) * 1970-12-15 1973-01-23 Okawara Mfg Fluidized drying apparatus
DE2924523A1 (en) * 1979-06-18 1981-01-15 Urad Predsednictva Slovenskej Processing of material by fluidisation - using fluidised bed equipped with stirrer
DE3223047A1 (en) * 1982-06-19 1983-12-22 Johannes Möller Hamburg GmbH & Co KG, 2000 Hamburg FLUIDIZED LAYER HEAT EXCHANGER

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE89238C (en) *
GB178636A (en) * 1921-02-16 1922-04-27 Nils Testrup Improvements in or relating to drying processes and apparatus therefor
DE444847C (en) * 1924-03-07 1927-05-28 I G Farbenindustrie Akt Ges Process for drying and glowing in pots
DE473364C (en) * 1925-12-28 1929-03-14 Joseph Pasquiers Device for drying quark
FR657439A (en) * 1928-07-12 1929-05-22 Dryer
DE606891C (en) * 1932-07-21 1934-12-13 Fried Krupp Grusonwerk Akt Ges Device for drying goods in several stages
DE620572C (en) * 1933-03-25 1936-01-23 Johannes Ihlefeldt Method and device for conveying powdery bulk goods using a gaseous pressure medium
DE641457C (en) * 1937-02-01 Albert Von Lom Dipl Ing Dryer for grain and other grainy or lumpy goods
DE649755C (en) * 1933-07-26 1938-01-26 Heinrich Willmer Dr Ing Device for cooling and degassing lignite
US2529366A (en) * 1945-03-02 1950-11-07 Wolf G Bauer Fluidizing process and mechanism
US2586818A (en) * 1947-08-21 1952-02-26 Harms Viggo Progressive classifying or treating solids in a fluidized bed thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE89238C (en) *
DE641457C (en) * 1937-02-01 Albert Von Lom Dipl Ing Dryer for grain and other grainy or lumpy goods
GB178636A (en) * 1921-02-16 1922-04-27 Nils Testrup Improvements in or relating to drying processes and apparatus therefor
DE444847C (en) * 1924-03-07 1927-05-28 I G Farbenindustrie Akt Ges Process for drying and glowing in pots
DE473364C (en) * 1925-12-28 1929-03-14 Joseph Pasquiers Device for drying quark
FR657439A (en) * 1928-07-12 1929-05-22 Dryer
DE606891C (en) * 1932-07-21 1934-12-13 Fried Krupp Grusonwerk Akt Ges Device for drying goods in several stages
DE620572C (en) * 1933-03-25 1936-01-23 Johannes Ihlefeldt Method and device for conveying powdery bulk goods using a gaseous pressure medium
DE649755C (en) * 1933-07-26 1938-01-26 Heinrich Willmer Dr Ing Device for cooling and degassing lignite
US2529366A (en) * 1945-03-02 1950-11-07 Wolf G Bauer Fluidizing process and mechanism
US2586818A (en) * 1947-08-21 1952-02-26 Harms Viggo Progressive classifying or treating solids in a fluidized bed thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182153B (en) * 1962-04-05 1964-11-19 Metallgesellschaft Ag Method and device for drying granules
US3711962A (en) * 1970-12-15 1973-01-23 Okawara Mfg Fluidized drying apparatus
DE2924523A1 (en) * 1979-06-18 1981-01-15 Urad Predsednictva Slovenskej Processing of material by fluidisation - using fluidised bed equipped with stirrer
DE3223047A1 (en) * 1982-06-19 1983-12-22 Johannes Möller Hamburg GmbH & Co KG, 2000 Hamburg FLUIDIZED LAYER HEAT EXCHANGER

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