DE2827568A1 - Air cooling system for cement clinker - where dust free air leaving indirect cooler is fed up direct grate cooler to increase thermal efficiency - Google Patents

Air cooling system for cement clinker - where dust free air leaving indirect cooler is fed up direct grate cooler to increase thermal efficiency

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Publication number
DE2827568A1
DE2827568A1 DE19782827568 DE2827568A DE2827568A1 DE 2827568 A1 DE2827568 A1 DE 2827568A1 DE 19782827568 DE19782827568 DE 19782827568 DE 2827568 A DE2827568 A DE 2827568A DE 2827568 A1 DE2827568 A1 DE 2827568A1
Authority
DE
Germany
Prior art keywords
cooler
air
cooling
direct
indirect
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.)
Ceased
Application number
DE19782827568
Other languages
German (de)
Inventor
Nichtnennung Beantragt
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.)
Claudius Peters AG
Original Assignee
Claudius Peters AG
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 Claudius Peters AG filed Critical Claudius Peters AG
Priority to DE19782827568 priority Critical patent/DE2827568A1/en
Publication of DE2827568A1 publication Critical patent/DE2827568A1/en
Ceased legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/43Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/47Cooling ; Waste heat management

Abstract

The roasted clinker or similar material leaves a furnace and enters a direct cooler, esp. a grate cooler, from which the clinker enters a crusher and then travels downwards via gravity through an indirect cooler. A row of fans is employed to blow air up the indirect cooler so the air becomes hot while cooling the clinker; and the hot air is then fed to the grate cooler and used to cool clinker travelling along the grate. The fans employed to blow air up the indirect cooler are pref. sufficiently powerful to drive the hot air to the direct cooler without the use of additional fans located between the two coolers. In conventional plant, the air leaving the indirect cooler is dust free and is usually released to atmos., but this wastes the heat picked up by the air while travelling up the indirect cooler. The invention exploits the heat in this air.

Description

VERFAHREN ZUR VERWERTUNG DER ABLUFT METHOD FOR RECYCLING EXHAUST AIR

EINER ZWEISTUFIGEN KUHLVORRICHTUNG FUR BRENNGUT Die Erfindung bezieht sich auf ein Verfahren zur Verwertung der Abluft der zweiten Stufe einer aus einem direkt wirkenden Kühler, insbesondere Rostkühler, und einem indirekt wirkenden Kühler, insbesondere Schwerkraftkühler, mit zwischen erster und zweiter Stufe angeordnetem Brecher bestehenden Vorrichtung zum Kühlen von grobkörnigem Brenngut, wie Zementklinker. A TWO-STAGE COOLING DEVICE FOR FUEL MATERIAL The invention relates on a process for the recovery of the exhaust air of the second stage one from one direct acting cooler, especially grate cooler, and an indirectly acting cooler, in particular gravity cooler, with arranged between the first and second stage Crusher existing device for cooling coarse-grained fuel, such as cement clinker.

Bei einer derartigen zweistufigen Kühlvorrichtung für Zementklinker (DE-AS 20 10 601) wird die Kühlluft, die den Kühl rost der direkt wirkenden Kühlstufe durchströmt hat, als Verbrennungsluft dem Brennofen zugeführt. Die Kühl luft, die die Kühlkanäle des indirekt wirkenden Kühlers der zweiten Kühistufe durchströmt hat, wird üblicherweise in die Atmosphäre abgeblasen. Dies ist ohne weiteres möglich, weil die Luft nicht mit dem Kühlgut in Verbindung gekommen und daher staubfrei ist.In such a two-stage cooling device for cement clinker (DE-AS 20 10 601) is the cooling air that grate the cooling of the direct-acting cooling stage has flowed through, fed as combustion air to the furnace. The cool air that flows through the cooling channels of the indirectly acting cooler of the second cooling stage is usually vented to the atmosphere. This is easily possible because the air does not come into contact with the refrigerated goods and is therefore free of dust.

Die in dieser Luft enthaltene Wärme wird jedoch bei einer derartigen Verfahrensweise nicht ausgenutzt.However, the heat contained in this air becomes with such Procedure not used.

Der Erfindung liegt die Aufgabe zugrunde, die Abluft der zweiten Kühl stufe einer Vorrichtung zum Kühlen von Brenngut, wie Zementklinker, in wirtschaftlicher Weise zu verwerten.The invention is based on the object of cooling the exhaust air from the second stage of a device for cooling firing material, such as cement clinker, in more economical Way to recycle.

Die erfindungsgemäße Lösung besteht in einem Verfahren, mit dessen Hilfe mindestens Teilmengen der den indirekt wirkenden Kühler verlassenden erhitzten Kühl luft, insbesondere ohne Zwischenschaltung weiterer Ventilatoren, von den Kühlluftventilatoren, die dem indirekt wirkenden Kühler vorgeschaltet sind, dem direkt wirkenden Kühler als Kühl luft zugeführt werden.The solution according to the invention consists in a method with which With the help of at least partial quantities of the indirect radiator leaving the heated Cooling air, especially without the interposition of additional fans, from the cooling air fans, which are connected upstream of the indirectly acting cooler, the direct acting cooler be supplied as cooling air.

Bedarfsfälle für die Anwendung dieses Verfahrens bestehen darin, daß die heiße Abluft des direkt wirkenden Kühlers im Bereich eines Zementwerkes für Trocknungs- und Vorwärmzwecke sowie bei Abhitzekesseln ausgenutzt wird. Beispielsweise kann die in der Abluft enthaltene Wärme für die Schlacke-oder Rohmaterial trocknung in Trockentrommeln verwendet werden, ferner in einer Kohlenmahlanlage.Needs for the application of this method are that the hot exhaust air of the direct-acting cooler in the area of a cement plant for Drying and preheating purposes as well as waste heat boilers are used. For example the heat contained in the exhaust air can be used for drying the slag or raw material can be used in drying drums, as well as in a coal grinding plant.

Mit der heißen Kühlerabluft läßt sich auch Wasser aufheizen, das für betriebliche Zwecke benötigt wird.The hot exhaust air from the cooler can also be used to heat water that is used for operational purposes is required.

Die erhitzte Abluft des indirekt wirkenden Kühlers' die erfindungsgemäß als Kühl luft für den direkt wirkenden Kühler benutzt wird, erhöht die Ablufttemperatur dieses Kühlers in dem Maße, wie es für die Weiterverwendung dieser Luft in der Dampferzeugungsanlage erforderlich ist.The heated exhaust air of the indirectly acting cooler 'according to the invention is used as cooling air for the direct-acting cooler, increases the exhaust air temperature this cooler to the extent that it is for the further use of this air in the steam generation plant is required.

Andererseits wird durch die Erhöhung des Temperaturniveaus der Kühl luft der ersten Stufe dieser Kühlvorrichtung der Kühleffekt beim zu kühlenden Brenngut nur geringfügig vermindert. Dies ist insofern unerheblich, als sich an die erste direkt wirkende Kühl stufe eine zweite indirekt wirkende Kühl stufe anschließt, so daß die Gewähr gegeben ist, daß die erforderliche Endkühlung des Brenngutes erreicht wird.On the other hand, by increasing the temperature level, the cooling air of the first stage of this cooling device, the cooling effect on the items to be cooled only slightly reduced. This is insignificant in that it relates to the first direct cooling stage followed by a second indirect cooling stage, so that the guarantee is given that the required final cooling of the material to be fired is achieved will.

Die einzige Figur zeigt eine zweistufige Vorrichtung zum Kühlen von aus einem Brennofen kommenden grobkörnigem Brenngut, wie Zementklinker, in einem schematischen Längsschnitt.The single figure shows a two-stage device for cooling Coarse-grained firing material coming from a kiln, such as cement clinker, in one schematic longitudinal section.

An den Drehrohrofen 1 schließt sich die erste Kühl stufe 2 mit einem Schrägrost 3 an. Am Ende des Rostes 3 ist ein Brecher 4 angeordnet. Das gebrochene Gut gelangt über einen Senkrechtförderer 5 zur zweiten Kühl stufe 6. Hier wird das Gut mittels einer Schrapperkette 7 auf den indirekt wirkenden Schwerkraftkühler verteilt.At the rotary kiln 1, the first cooling stage 2 closes with a Inclined grate 3 on. A crusher 4 is arranged at the end of the grate 3. The broken one Good reaches the second cooling stage 6 via a vertical conveyor 5 Good by means of a scraper chain 7 on the indirectly acting gravity cooler distributed.

Die Kühlluftventilatoren 8 der zweiten Kühl stufe 6 blasen Kühl luft von unten nach oben durch die nicht dargestellten Kanäle des Schwerkraftkühlers.The cooling air fans 8 of the second cooling stage 6 blow cooling air from bottom to top through the channels, not shown, of the gravity cooler.

Die erhitzte staubfreie Kühlluft tritt im oberen Bereich des Schwerkraftkühlers bei 9 aus und wird zur ersten Kühl stufe 2 geblasen, und zwar unterhalb des Schrägrostes 3. Die Förderung der Kühlluft durch die zweite Kühlstufe 6 zur ersten Kühlstufe 2 wird vorteilhafterweise ausschließlich von den Kühlluftventilatoren 8, d.h. ohne Zwischenschaltung weiterer Ventilatoren, vorgenommen.The heated, dust-free cooling air enters the upper area of the gravity cooler at 9 and is blown to the first cooling stage 2, namely below the inclined grate 3. The conveyance of the cooling air through the second cooling stage 6 to the first cooling stage 2 is advantageously used exclusively by the cooling air fans 8, i.e. without Interconnection of further fans made.

Ein Teil der Abluft der ersten Kühl stufe 2 wird als Verbrennungsluft 10 dem Brennofen 1 zugeführt, während der übrige Teil ii der Abluft der ersten Kühlstufe beispielsweise als Wärmeenergie einer Dampferzeugungsanlage zugeführt werden kann.Part of the exhaust air from the first cooling stage 2 is used as combustion air 10 fed to the furnace 1, while the remaining part ii of the exhaust air from the first cooling stage for example, can be supplied as thermal energy to a steam generation system.

LeerseiteBlank page

Claims (1)

Patentanspruch Verfahren zur Verwertung der Abluft der zweiten Stufe einer aus einem direkt wirkenden Kühler, insbesondere Rostkühler, und einem indirekt wirkenden Kühler, insbesondere Schwerkraftkühler, mit zwischen erster und zweiter Stufe angeordnetem Brecher bestehenden Vorrichtung zum Kühlen von grobkörnigem Brenngut, wie Zementklinker, dadurch gekennzeichnet, daß mindestens Teilmengen der den indirekt wirkenden Kühler (6) verlassenden erhitzten Kühiluft, insbesondere ohne Zwischenschaltung weiterer Ventilatoren, von den Kühlluftventilatoren (8), die dem indirekt wirkenden Kühler vorgeschaltet sind, dem direkt wirkenden Kühler (2) als Kühiluft zugeführt werden. Method for recycling the exhaust air from the second stage one from a direct acting cooler, in particular grate cooler, and one indirect acting cooler, in particular gravity cooler, with between the first and second Level arranged crusher for cooling coarse-grained material to be fired, such as cement clinker, characterized in that at least subsets of the indirect acting cooler (6) leaving heated cooling air, in particular without interposition other fans, from the cooling air fans (8) to the indirectly acting Upstream coolers are fed to the direct-acting cooler (2) as cooling air will.
DE19782827568 1978-06-23 1978-06-23 Air cooling system for cement clinker - where dust free air leaving indirect cooler is fed up direct grate cooler to increase thermal efficiency Ceased DE2827568A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782827568 DE2827568A1 (en) 1978-06-23 1978-06-23 Air cooling system for cement clinker - where dust free air leaving indirect cooler is fed up direct grate cooler to increase thermal efficiency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782827568 DE2827568A1 (en) 1978-06-23 1978-06-23 Air cooling system for cement clinker - where dust free air leaving indirect cooler is fed up direct grate cooler to increase thermal efficiency

Publications (1)

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DE2827568A1 true DE2827568A1 (en) 1980-01-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512188A1 (en) * 1981-09-02 1983-03-04 Kloeckner Humboldt Deutz Ag COOKING INSTALLATION, IN PARTICULAR FOR THE MANUFACTURE OF CEMENT CLINKER

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2119006C3 (en) * 1971-04-20 1974-01-03 Polysius Ag, 4723 Neubeckum Device for cooling material fired in a furnace system, in particular cement clinker
DE2010601B2 (en) * 1970-03-06 1976-02-12 Claudius Peters Ag, 2000 Hamburg TWO-STAGE COOLER FOR LARGE FUEL MATERIAL LIKE CEMENT CLINKERS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2010601B2 (en) * 1970-03-06 1976-02-12 Claudius Peters Ag, 2000 Hamburg TWO-STAGE COOLER FOR LARGE FUEL MATERIAL LIKE CEMENT CLINKERS
DE2119006C3 (en) * 1971-04-20 1974-01-03 Polysius Ag, 4723 Neubeckum Device for cooling material fired in a furnace system, in particular cement clinker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Zement-Kalk-Gips, 1977, 623-624 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512188A1 (en) * 1981-09-02 1983-03-04 Kloeckner Humboldt Deutz Ag COOKING INSTALLATION, IN PARTICULAR FOR THE MANUFACTURE OF CEMENT CLINKER

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