DE10356782A1 - Process to dry atomised liquid substances in a spray tower by admixture of cellular dewatering agent with a capillary structure - Google Patents

Process to dry atomised liquid substances in a spray tower by admixture of cellular dewatering agent with a capillary structure Download PDF

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Publication number
DE10356782A1
DE10356782A1 DE2003156782 DE10356782A DE10356782A1 DE 10356782 A1 DE10356782 A1 DE 10356782A1 DE 2003156782 DE2003156782 DE 2003156782 DE 10356782 A DE10356782 A DE 10356782A DE 10356782 A1 DE10356782 A1 DE 10356782A1
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DE
Germany
Prior art keywords
cellulose
spray
drying
capillary structure
mixtures
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.)
Withdrawn
Application number
DE2003156782
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German (de)
Inventor
Harald Schlosser
Marc Mohring
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.)
J Rettenmaier and Soehne GmbH and Co KG
Original Assignee
J Rettenmaier and Soehne GmbH and Co KG
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 J Rettenmaier and Soehne GmbH and Co KG filed Critical J Rettenmaier and Soehne GmbH and Co KG
Priority to DE2003156782 priority Critical patent/DE10356782A1/en
Publication of DE10356782A1 publication Critical patent/DE10356782A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B01D1/18—Evaporating by spraying to obtain dry solids

Abstract

A hot gas spray-drying process dries liquid ingredients e.g. solvents, dispersions, emulsions and suspensions that advance in a single direction or in counter-flow. The ingredients incorporate a cellular dewatering agent with a capillary structure. The dewatering agent is added to the ingredients prior to release by jet into a spray tower, or introduced separately with the hot gas. The dewatering agent is e.g. cellulose, microcrystalline cellulose, chemo thermal mechanical pulp, thermo mechanical pulp, wood fiber, wheat fiber or fruit fiber in particles of 20 to 500 m, 0.5 to 10 Wt.

Description

Die Erfindung bezieht sich auf Sprühtrocknungsverfahren der dem Oberbegriff des Anspruchs 1 entsprechenden Art.The This invention relates to spray drying processes the corresponding to the preamble of claim 1 Art.

Das erfindungsgemäße Sprühtrocknungsverfahren ermöglicht eine beschleunigte Trocknung der zerstäubten Flüssigkeitströpfchen. Im Umkehrschluss erhält man bei gleicher Sprühturmgeometrie und Temperaturführung eine Steigerung der Sprühkapazität.The Spray drying method according to the invention allows an accelerated drying of the atomized liquid droplets. Conversely, you get at same spray tower geometry and temperature control an increase in spray capacity.

Die Sprühtrocknung ist ein gängiges Verfahren und wird großtechnisch in den unterschiedlichsten Bereichen eingesetzt, so z.B. zur Trocknung hitzeempfindlicher Nahrungsmittel, Pigmentformulierungen oder Wasch- und Reinigungsmittel. Dazu werden die flüssigen Ausgangsprodukte mittels Düsen oder Schleuderrad zu einzelnen Tröpfchen zerteilt. Diese werden durch Heißgase im Gegen- oder Gleichstrom getrocknet.The Spray drying is a common one Procedure and will be on an industrial scale used in various fields, e.g. for drying heat-sensitive foods, pigment formulations or laundry detergents. and detergents. For this purpose, the liquid starting products by means of Nozzles or Blower wheel to individual droplets divided. These are made by hot gases in counter or direct current dried.

Durch Verbesserung der Zerstäubertechnik konnte die Sprühtrocknung optimiert und die Sprühkapazität erhöht werden.By Improvement of the atomizer technology could the spray drying optimized and the spray capacity can be increased.

Man fand jetzt heraus, dass feinteilige Produkte mit kapillarem System den Trocknungsvorgang der einzelnen Tröpfchen beschleunigen. Dadurch ist es möglich, Wertstoffe bzw. Wertstoffgemische mit höherem Trockensubstanzgehalt in den Sprühturm einzudüsen oder bei gleicher Verweilzeit im Turm, Tröpfchen mit größerem Volumen zu zerstäuben und so die Sprühkapazität zu erhöhen.you now found out that finely divided products with capillary system accelerate the drying process of the individual droplets. Thereby Is it possible, Recyclables or valuable mixtures with higher dry matter content into the spray tower or with the same residence time in the tower, droplets with a larger volume to atomise and so to increase the spray capacity.

Gegenstand dieser Erfindung ist die Verkürzung der Sprühtrocknungszeit einhergehend mit einer Erhöhung der Sprühkapazität.object this invention is the shortening the spray drying time along with an increase the spray capacity.

Erfindungsgemäß wird dies durch Verwendung von feinteiligem Material mit kapillarem System nach Anspruch 1 erreicht.According to the invention this is by using finely divided material with a capillary system Claim 1 reached.

Die Faserbündel des cellulosehaltigen Materials bilden Kapillaren aus, dadurch wird beim Sprühtrocknungsprozess die Flüssigkeit schneller aus dem Tropfeninnern an die Oberfläche transportiert.The fiber bundles of the cellulose-containing material form capillaries, thereby becoming in the spray drying process the liquid transported faster from the inside of the drip to the surface.

Cellulose ist ein unverzweigtes Polysaccharid, das ausschließlich aus Glucose-Molekülen aufgebaut ist.cellulose is an unbranched polysaccharide made exclusively from Built up glucose molecules is.

Claims (8)

Verfahren zur Sprühtrocknung von Wertstoffen und Wertstoffgemischen unter Verwendung von im Gleich- und/oder Gegenstrom gefahrenen Heißgasen als Trocknungsmittel, dadurch gekennzeichnet, dass der Wertstoff bzw. das Wertstoffgemisch ein cellulosehaltiges Entwässerungshilfsmittel mit Kapillarstruktur enthält.A process for the spray-drying of recyclable materials and valuable mixtures using co-current and / or countercurrent hot gases as drying agent, characterized in that the valuable material or the valuable material mixture contains a cellulose-containing drainage aid with capillary structure. Verfahren zur Sprühtrocknung von Wertstoffen und Wertstoffgemischen unter Verwendung von im Gleich- und/oder Gegenstrom gefahrenen Heißgasen als Trocknungsmittel, dadurch gekennzeichnet, dass man den Wertstoffen bzw. Wertstoffgemischen vor dem Eindüsen in den Sprühturm ein cellulosehaltiges Entwässerungshilfsmittel mit Kapillarstruktur zugibt.Method for spray drying recyclable materials and mixtures of substances using and / or countercurrently driven hot gases as drying agent, characterized in that before the recyclables or mixtures of recyclables before the injection in the spray tower a cellulose-containing drainage aid added with capillary structure. Verfahren zur Sprühtrocknung von Wertstoffen und Wertstoffgemischen unter Verwendung von im Gleich- und/oder Gegenstrom gefahrenen Heißgasen als Trocknungsmittel, dadurch gekennzeichnet, dass das cellulosehaltige Entwässerungshilfsmittel getrennt von den zu trocknenden Wertstoffen in den Sprühturm eingebracht wird.Method for spray drying recyclable materials and mixtures of substances using and / or countercurrently driven hot gases as drying agent, characterized in that the cellulose-containing dewatering aid is separated is introduced from the recyclables to be dried in the spray tower. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass man das cellulosehaltige Entwässerungshilfsmittel unmittelbar dem Heißgasstrom zusetzt, bevorzugt aber mittels eines Hilfsgasstroms in den Trocknungsturm einbringt.Method according to claim 3, characterized that the cellulose-containing drainage aids immediately the hot gas stream added, but preferably by means of an auxiliary gas stream in the drying tower brings. Verfahren nach Anspruch 1–4, dadurch gekennzeichnet, dass das cellulosehaltige Entwässerungshilfsmittel aus Cellulose, Mikrokristalliner Cellulose, CTMP (Chemo Thermo Mechanical Pulp), TMP (Thermo Mechanical Pulp), Holzfaser, Getreidefasern, oder Fruchtfasern besteht.Process according to claims 1-4, characterized in that that the cellulose-containing drainage aid cellulose, microcrystalline cellulose, CTMP (Chemo Thermo Mechanical Pulp), TMP (Thermo Mechanical Pulp), wood fiber, cereal fibers, or fruit fibers. Verfahren nach Anspruch 1–5, dadurch gekennzeichnet, dass die Teilchengröße des cellulosehaltigen Materials 1 bis 2000 μm, vorzugsweise 20 bis 500 μm beträgt.Process according to claims 1-5, characterized in that that the particle size of the cellulosic Material 1 to 2000 μm, preferably 20 to 500 microns is. Verfahren nach Anspruch 1–6, dadurch gekennzeichnet, dass der Gewichtsanteil des cellulosehaltigen Materials 0,01 bis 40 Prozent, vorzugsweise 0,5 bis 10 Prozent beträgt.Method according to claims 1-6, characterized the proportion by weight of the cellulose-containing material is from 0.01 to 40 percent, preferably 0.5 to 10 percent. Verfahren nach Anspruch 1–7, dadurch gekennzeichnet, dass es sich beim dem cellulosehaltigen Material um ARBOCEL® und VIVAPUR® der Fa. J. Rettenmaier & Söhne handelt.Method according to claim 1-7, characterized in that it is in the cellulose-containing material to ARBOCEL ® and VIVAPUR ® from. J. Rettenmaier & Sons.
DE2003156782 2003-12-02 2003-12-02 Process to dry atomised liquid substances in a spray tower by admixture of cellular dewatering agent with a capillary structure Withdrawn DE10356782A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2003156782 DE10356782A1 (en) 2003-12-02 2003-12-02 Process to dry atomised liquid substances in a spray tower by admixture of cellular dewatering agent with a capillary structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2003156782 DE10356782A1 (en) 2003-12-02 2003-12-02 Process to dry atomised liquid substances in a spray tower by admixture of cellular dewatering agent with a capillary structure

Publications (1)

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DE10356782A1 true DE10356782A1 (en) 2005-07-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2904617B1 (en) 2012-10-05 2016-11-30 ABB Schweiz AG Apparatus containing a dielectric insulation gas comprising an organofluorine compound
CN111982631A (en) * 2020-08-27 2020-11-24 新乡医学院 Pathological tissue dewatering device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2904617B1 (en) 2012-10-05 2016-11-30 ABB Schweiz AG Apparatus containing a dielectric insulation gas comprising an organofluorine compound
CN111982631A (en) * 2020-08-27 2020-11-24 新乡医学院 Pathological tissue dewatering device

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