DE10316687A1 - Fluid-bed cooler, at an ammonium nitrate/nitrogen fertilizer granulating assembly, has a fluid bed in two sections over each other using gravity to transport the product and with a single air blower fan - Google Patents
Fluid-bed cooler, at an ammonium nitrate/nitrogen fertilizer granulating assembly, has a fluid bed in two sections over each other using gravity to transport the product and with a single air blower fan Download PDFInfo
- Publication number
- DE10316687A1 DE10316687A1 DE2003116687 DE10316687A DE10316687A1 DE 10316687 A1 DE10316687 A1 DE 10316687A1 DE 2003116687 DE2003116687 DE 2003116687 DE 10316687 A DE10316687 A DE 10316687A DE 10316687 A1 DE10316687 A1 DE 10316687A1
- Authority
- DE
- Germany
- Prior art keywords
- fluidized bed
- product
- bed cooler
- fluid
- ammonium nitrate
- 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- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
- F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
- F28C3/16—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material forming a bed, e.g. fluidised, on vibratory sieves
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- 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
- B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fertilizers (AREA)
Abstract
Description
Die Erfindung richtet sich auf einen Wirbelschichtkühler zum Einsatz in einer Ammonium-Nitrat-Granulieranlage sowie auf ein Verfahren zur Erzeugung eines solchen Granulates.The Invention is directed to a fluidized bed cooler for use in an ammonium nitrate pelletizer and a method for producing such granules.
Es ist bekannt, in Ammonium-Nitrat- und anderen Stickstoffdüngemittel-Granulieranlagen (im folgenden AN für Ammonium-Nitrat) Wirbelschichtkühler zur Kühlung des Granulates einzusetzen. Dabei ist es auch bekannt, diese Kühler derart als zweistufige Apparate auszubilden, daß es möglich ist, die Luft der zweiten Stufe als Kühlluft für die erste Stufe einzusetzen, wobei diese Bauweise es erforderlich macht, daß die Luft nach der zweiten Stufe mit einem zusätzlichen Gebläse verdichtet wird, um sie durch die erste Stufe zu führen, wobei es auch bekannt ist, die so vorgewärmte Luft später in der Anlage im Trockner zur Trocknung des Granulates einzusetzen.It is known in ammonium nitrate and other nitrogen fertilizer granulating plants (in the following AN for Ammonium nitrate) Fluidized bed cooler for cooling of the granules. It is also known to use such coolers to train as two-stage apparatus that it is possible to air the second Stage as cooling air for the to use the first stage, this construction making it necessary that the Air after the second stage is compressed with an additional fan is going to guide them through the first stage, also being known is that so preheated Air later use in the system in the dryer to dry the granules.
Derartige Anlagen bzw. Kühler haben den Nachteil, daß sie vergleichsweise viel Platz benötigen und insbesondere den Nachteil, daß zu ihrem Betrieb wenigstens zwei Gebläse eingesetzt werden müssen.such Systems or coolers have the disadvantage that they require a comparatively large amount of space and in particular the disadvantage that at least for their operation two blowers must be used.
Hier setzt die Erfindung an, deren Aufgabe darin besteht, eine derartige Kühlung wirtschaftlicher zu gestalten, insbesondere durch eine kompaktere Bauweise und durch den Einsatz lediglich eines einzigen Kühlgebläses.Here applies the invention, the task of which is such cooling to make it more economical, in particular through a more compact design and by using only a single cooling fan.
Bei einem Wirbelschichtkühler der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß die Wirbelschicht zur Produktkühlung in wenigstens zwei Abschnitten innerhalb eines gemeinsamen Gehäuses übereinander angeordnet ist, wobei das zu behandelnde Produkt in Schwerkraftrichtung von oben nach unten die einzelnen Abschnitte durchläuft.at a fluidized bed cooler of the type described in the introduction, this object is achieved according to the invention solved by that the Fluid bed for product cooling one above the other in at least two sections within a common housing is arranged, the product to be treated in the direction of gravity runs through the individual sections from top to bottom.
Die erfindungsgemäße Verfahrensweise zeichnet sich zur Lösung der Aufgabe dadurch aus, daß der Wirbelschichtkühler als wenigstens zweietagiger Wirbelschichtkühler.The procedure according to the invention to the solution the task characterized in that the Fluidized bed cooler as an at least two-day fluidized bed cooler.
Mit der Erfindung wird erreicht, daß das Wirbelschichtkühlbett in einzelne Abschnitte unterteilbar ist, die nicht nacheinander mit Kühlluft beaufschlagt werden müssen, sondern durch ihre in Schwerkraftrichtung übereinander liegende Anordnung den gleichen Luftstrom benutzen können, der sonst lediglich nur einen Teil der Wirbelschicht beaufschlagt.With the invention achieves that Fluidized cooling bed can be divided into individual sections that are not consecutive with cooling air have to be acted upon but because of their superimposed arrangement in the direction of gravity can use the same airflow that is otherwise only applied to part of the fluidized bed.
Besondere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Special Embodiments of the invention result from the subclaims.
Eine Besonderheit kann dabei nach der Erfindung darin liegen, daß im letzten Wirbelschichtabschnitt vor dem Produktaustrag eine im wesentlichen gleichmäßige Temperatur zur Phasenumwandlung des AN von Modifikation III zu Modifikation IV eingestellt ist. Als Beispiel sei hier angegeben, daß bei einem zweigeschossigen Kühler die beispielsweise mit 14°C eingebrachte Kühlluft die zweite Stufe mit 27°C verläßt und damit hinreichend vorgewärmt ist, so daß es nicht zu einem Thermoschock des heißes AN (98°C) der ersten Stufe kommt. Dies insbesondere deswegen, weil etwa 80% der Fläche des zweiten Bettes für die Phasenumwandlung von AN in die Modifikation III zu Modifikation IV (um 32,3°C) eingesetzt werden kann.A Peculiarity can be according to the invention that in the last Fluidized bed section before the product discharge a substantially uniform temperature for phase change of the contractor from modification III to modification IV is set. As an example, it should be stated here that with a two-story cooler for example with 14 ° C cooling air introduced leaves the second stage at 27 ° C and thus sufficiently preheated is so it there is no thermal shock of the hot AN (98 ° C) of the first stage. This in particular because about 80% of the area of the second bed for phase change used by AN in modification III to modification IV (around 32.3 ° C) can.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aufgrund der nachfolgenden Beschreibung sowie anhand der Zeichnung. Diese zeigt inFurther Features, details and advantages of the invention result from the following description and the drawing. This shows in
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der Leitung
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Natürlich ist das beschriebene Ausführungsbeispiel der Erfindung noch in vielfacher Hinsicht abzuändern, ohne den Grundgedanken zu verlassen. So ist die Erfindung nicht zwingend auf die Zweistufigkeit der übereinander liegenden Wirbelschichtbereiche beschränkt, hier können auch drei Wirbelschichtabschnitte übereinander vorgesehen sein u. dgl. mehr.of course is the described embodiment change the invention in many ways without the basic idea to leave. So the invention is not mandatory on the two-stage the one above the other lying fluidized bed areas limited, here also three fluidized bed sections one above the other be provided u. Like. more.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003116687 DE10316687A1 (en) | 2003-04-10 | 2003-04-10 | Fluid-bed cooler, at an ammonium nitrate/nitrogen fertilizer granulating assembly, has a fluid bed in two sections over each other using gravity to transport the product and with a single air blower fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003116687 DE10316687A1 (en) | 2003-04-10 | 2003-04-10 | Fluid-bed cooler, at an ammonium nitrate/nitrogen fertilizer granulating assembly, has a fluid bed in two sections over each other using gravity to transport the product and with a single air blower fan |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10316687A1 true DE10316687A1 (en) | 2004-10-28 |
Family
ID=33039026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003116687 Withdrawn DE10316687A1 (en) | 2003-04-10 | 2003-04-10 | Fluid-bed cooler, at an ammonium nitrate/nitrogen fertilizer granulating assembly, has a fluid bed in two sections over each other using gravity to transport the product and with a single air blower fan |
Country Status (1)
Country | Link |
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DE (1) | DE10316687A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100451523C (en) * | 2007-07-06 | 2009-01-14 | 中国黄金集团公司技术中心 | Method for converting to hot air from sand baked in baking furnace |
-
2003
- 2003-04-10 DE DE2003116687 patent/DE10316687A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100451523C (en) * | 2007-07-06 | 2009-01-14 | 中国黄金集团公司技术中心 | Method for converting to hot air from sand baked in baking furnace |
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8141 | Disposal/no request for examination |