DE10327028A1 - Process for heat treating mineral raw materials involves adding granular component to cooling gas before contact with bypass stream - Google Patents
Process for heat treating mineral raw materials involves adding granular component to cooling gas before contact with bypass stream Download PDFInfo
- Publication number
- DE10327028A1 DE10327028A1 DE2003127028 DE10327028A DE10327028A1 DE 10327028 A1 DE10327028 A1 DE 10327028A1 DE 2003127028 DE2003127028 DE 2003127028 DE 10327028 A DE10327028 A DE 10327028A DE 10327028 A1 DE10327028 A1 DE 10327028A1
- Authority
- DE
- Germany
- Prior art keywords
- fine
- bypass
- cooling gas
- raw materials
- grained
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/60—Methods for eliminating alkali metals or compounds thereof, e.g. from the raw materials or during the burning process; methods for eliminating other harmful components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/2016—Arrangements of preheating devices for the charge
- F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
Abstract
Description
Die Erfindung betrifft ein Verfahren sowie eine Anlage zur Wärmebehandlung von mineralischen Rohmaterialien durch Vorwärmen, Brennen, und Kühlen der Rohmaterialien, wobei die beim Brennen entstehenden heißen Abgase zur Vorwärmung verwendet werden und wobei ein Bypassstrom der Abgase zur Verringerung der Schadstoffkonzentration abgezweigt, mit einem Kühlgas gekühlt und anschließend gefiltert wird.The The invention relates to a method and a plant for heat treatment of mineral raw materials by preheating, firing, and cooling the Raw materials, with the resulting hot exhaust gases during firing used for preheating and wherein a bypass flow of the exhaust gases to reduce the Dedicated pollutant concentration, cooled with a cooling gas and then filtered becomes.
Der heiße Bypassstrom wird üblicherweise aus dem Ofeneinlaufgehäuse abgezogen und dann mit Luft bzw. Wasser auf die gewünschte Mischgastemperatur gekühlt, wobei an dem im Bypassstrom enthaltenen Staub die Schadstoffe kondensieren. Es ist weiterhin bekannt, dass bei zu niedriger Staubkonzentration im Bypassstrom Ansatzprobleme auftreten. Um diese zu vermeiden, erzeugt man zusätzliche Mehlschleier im Ofeneinlaufgehäuse, indem man beispielsweise Stufen im Aufgabebereich vorsieht.Of the name is Bypass current is usually off the oven inlet housing withdrawn and then with air or water to the desired mixed gas temperature cooled, wherein the pollutants condense on the dust contained in the bypass flow. It is also known that if the dust concentration is too low Bypass flow approach problems occur. To avoid this, you create additional Flour veil in the oven inlet casing, for example, by providing steps in the task area.
Bei diesem bekannten Verfahren können weder der Staubanteil noch die abgezogenen Korngrößen im Bypassstrom kontrolliert eingestellt werden. Wird zu wenig Staub abgezogen, sinkt die Betriebssicherheit durch Ansatzneigung. Bei zu hohen Staubanteil steigt der zu verwerfende Anteil. Bei grobem Bypassstaub ist zudem das Verhältnis von Kondensationsoberfläche und zugehöriger Masse ungünstig.at this known method can neither the dust content nor the withdrawn particle sizes in the bypass stream be adjusted in a controlled manner. If too little dust is removed, Operational safety decreases due to tendency to approach. If the dust content is too high increases the share to be rejected. In case of coarse bypass dust is also The relationship of condensation surface and associated Mass unfavorable.
Der Erfindung liegt daher die Aufgabe zugrunde, bei der Kühlung des heißen Bypassstroms die Betriebssicherheit zu erhöhen und gleichzeitig energetisch günstig zu arbeiten.Of the The invention is therefore based on the object, in the cooling of the be called Bypass current to increase reliability and at the same energetic Cheap to work.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 und 9 gelöst.According to the invention this Problem solved by the features of claims 1 and 9.
Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further Embodiments of the invention are the subject of the dependent claims.
Beim erfindungsgemäßen Verfahren zur Wärmebehandlung von mineralischen Rohmaterialien durch Vorwärmen, Brennen und Kühlen der Rohmaterialien werden die beim Brennen entstehenden Heizabgase zur Vorwärmung verwendet Außerdem wird ein Bypassstrom der Abgase zur Verringerung der Schadstoffkonzentration abgezweigt, mit einem Kühlgas gekühlt und anschließend gefiltert, wobei dem Kühlgas – vor dem Kontakt mit dem Abgas – wenigstens eine feinkörnige Komponente zudosiert wird.At the inventive method for heat treatment of mineral raw materials by preheating, firing and cooling the Raw materials are used to create the heating gases produced during firing preheating In addition, will a bypass flow of the exhaust gases to reduce the pollutant concentration branched off, with a cooling gas chilled and subsequently filtered, with the cooling gas - before the Contact with the exhaust - at least a fine-grained Component is metered.
Als feinkörnige Komponenten können beispielsweise kaltes oder vorgewärmtes Rohmehl, Filterstaub und/oder Kalksteinmehl zudosiert werden. Die erfindungsgemäße Anlage zur Wärmebehandlung von mineralischen Rohmaterialien bestehen im Wesentlichen aus einem Vorwärmer, einem Ofen und einem Kühler, wobei die beim Brennen entstehenden heißen Abgase im Vorwärmer verwendet werden und wobei ein Bypasssystem zur Verringerung der Schadstoffkonzentration der Abgase vorgesehen ist, wobei das Bypasssystem Mittel zur Zuführung von Kühlluft sowie nachgeordnete Mittel zu Filtern des gekühlten Bypassstrom aufweist. Die Mittel zu Zuführung von Kühlluft weisen zudem Mittel zum Zudosieren wenigstens einer feinkörnigen Komponente auf.When fine-grained Components can For example, cold or preheated raw meal, filter dust and / or limestone meal are metered. The inventive system for heat treatment of mineral raw materials consist essentially of one preheater, an oven and a cooler, wherein the resulting during firing hot exhaust gases used in the preheater and being a bypass system to reduce pollutant concentration the exhaust gases is provided, wherein the bypass system means for supplying cooling air and Having downstream means for filtering the cooled bypass stream. The means to feed of cooling air also have means for metering at least one fine-grained component on.
Weitere Ausgestaltungen und Vorteile der Erfindung werden anhand der nachfolgenden Beschreibung und der Zeichnung näher erläutert.Further Embodiments and advantages of the invention will become apparent from the following Description and drawing closer explained.
In der Zeichnung ist eine schematische Vorrichtung zur Wärmebehandlung von mineralischen Rohmaterialien mit einem erfindungsgemäßen Bypasssystem dargestellt.In The drawing is a schematic device for heat treatment of mineral raw materials with a bypass system according to the invention shown.
Die
dargestellte Anlage zur Wärmebehandlung
von mineralischen Rohmaterialien besteht im Wesentlichen aus einem
Vorwärmer
Der
Vorwärmer
Das
Bypasssystem
Die
Mittel
Die
mit den feinkörnigen
Komponenten versehende Kühlluft
wird dem abgezweigten Bypassstrom
In
einer vorteilhaften Ausgestaltung wird die Schadstoffkonzentration
des Bypassfilterstaubes
Eine
weitere zweckmäßige Regelung
besteht darin, die Menge des Kühlgases
und/oder der feinkörnigen
Komponenten in Abhängigkeit
der Temperatur des Mischgases
Durch das Mischen der Kühlluft mit den feinkörnigen Komponenten vor dem Einführen in den Bypassstrom kann die Betriebssicherheit erhöht werden, da die feinkörnigen Komponenten, wie beispielsweise der Staub, bei Temperaturen kleiner 700° C nicht mehr klebrig ist. Da nicht heißes Rohmehl als Kondensationskeime verwendet wird, ergibt sich ein energetischer Vorteil. Auch durch einen staubarmen Abzug aus dem Ofeneinlaufgehäuse wird der gesamte Klinkerherstellungsprozess weniger beeinflusst, wodurch insbesondere geringere Wärmeverluste entstehen.By the mixing of the cooling air with the fine-grained Components before insertion in the bypass current, the reliability can be increased, because the fine-grained Components, such as the dust, at temperatures smaller 700 ° C not more sticky. Not hot Raw meal is used as a condensation germ, results in an energetic Advantage. Also by a low-dust vent from the kiln inlet housing is the entire clinker manufacturing process is less affected, which means especially lower heat losses.
Beim erfindungsgemäßen Verfahren kann die erforderliche Kühlluftmenge wesentlich gesenkt werden, da die feinkörnigen Komponenten zur Kühlung beitragen. Ein niedrigerer Kühlluftbedarf lässt wiederum die Investitionskosten für Filter, Ventilatoren und Rohrleitungen sinken.At the inventive method can the required amount of cooling air be significantly reduced because the fine-grained components contribute to the cooling. A lower cooling air requirement lets go again the investment costs for Filters, fans and piping sink.
Es besteht außerdem die Möglichkeit feinkörnigen Komponenten einzusetzen, die sowieso zu entsorgen sind oder Probleme bereiten (Mahlschwänze ...). Der Einsatz von hochfeinem Staub, beispielsweise aus den Filtern, kann die Abfallmenge wesentlich reduzieren, da das Verhältnis von Oberfläche zur Masse sehr günstig ist. Die Dosierung von kalten Mehlen/stäuben ist darüber hinaus kostengünstig und genau beherrschbar, sodass eine höhere Effizienz erzielbar ist.It exists as well the possibility fine-grained Use components that are to be disposed of anyway or problems prepare (Mahlschwänze ...). The use of very fine dust, for example from the filters, can significantly reduce the amount of waste, since the ratio of surface very cheap to the mass is. The dosage of cold flours / dusts is beyond economical and precisely manageable, so that a higher efficiency can be achieved.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003127028 DE10327028B4 (en) | 2003-06-16 | 2003-06-16 | Process and plant for heat treatment of mineral raw materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003127028 DE10327028B4 (en) | 2003-06-16 | 2003-06-16 | Process and plant for heat treatment of mineral raw materials |
Publications (2)
Publication Number | Publication Date |
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DE10327028A1 true DE10327028A1 (en) | 2005-01-05 |
DE10327028B4 DE10327028B4 (en) | 2012-02-09 |
Family
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Family Applications (1)
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DE2003127028 Expired - Fee Related DE10327028B4 (en) | 2003-06-16 | 2003-06-16 | Process and plant for heat treatment of mineral raw materials |
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DE (1) | DE10327028B4 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008052942A2 (en) * | 2006-11-01 | 2008-05-08 | Solvay Chemicals, Inc. | Dust material heating process |
DE10327028B4 (en) * | 2003-06-16 | 2012-02-09 | Polysius Ag | Process and plant for heat treatment of mineral raw materials |
DE102014108154A1 (en) * | 2014-06-10 | 2015-12-17 | Elex Cemcat Ag | Process for treating exhaust gas and plant with an exhaust gas treatment device |
WO2021204549A1 (en) * | 2020-04-08 | 2021-10-14 | Thyssenkrupp Industrial Solutions Ag | Method and device for the production of cement clinker |
BE1028193B1 (en) * | 2020-04-08 | 2021-11-09 | Thyssenkrupp Ind Solutions Ag | Method and device for the production of cement clinker |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3403449A1 (en) * | 1984-02-01 | 1985-08-01 | Dyckerhoff Zementwerke Ag, 6200 Wiesbaden | Apparatus for the heat treatment of fine-grained material |
DE3520447A1 (en) * | 1985-06-07 | 1986-12-11 | Dyckerhoff Eng Gmbh | Process and plant for thermally treating a fine granular material such as cement raw meal, using fuel-containing wastes and/or low-grade fuels |
DE4436939A1 (en) * | 1994-10-15 | 1996-04-18 | Kloeckner Humboldt Deutz Ag | Plant for the thermal treatment of flour-like raw materials |
DE19718259A1 (en) * | 1997-04-30 | 1998-11-05 | Kloeckner Humboldt Wedag | Process and plant for reducing pollutant cycles in the production of cement clinker from raw meal |
DE10158968A1 (en) * | 2001-11-30 | 2003-06-12 | Kloeckner Humboldt Wedag | Process for reducing emissions of the pollutants dioxins and / or furans in a cement clinker production line |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3421877A1 (en) * | 1984-06-13 | 1985-12-19 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Process and plant for kilning particulate material having particularly high contents of pollutants such as chlorides and alkali metals |
DE10327028B4 (en) * | 2003-06-16 | 2012-02-09 | Polysius Ag | Process and plant for heat treatment of mineral raw materials |
-
2003
- 2003-06-16 DE DE2003127028 patent/DE10327028B4/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3403449A1 (en) * | 1984-02-01 | 1985-08-01 | Dyckerhoff Zementwerke Ag, 6200 Wiesbaden | Apparatus for the heat treatment of fine-grained material |
DE3520447A1 (en) * | 1985-06-07 | 1986-12-11 | Dyckerhoff Eng Gmbh | Process and plant for thermally treating a fine granular material such as cement raw meal, using fuel-containing wastes and/or low-grade fuels |
DE4436939A1 (en) * | 1994-10-15 | 1996-04-18 | Kloeckner Humboldt Deutz Ag | Plant for the thermal treatment of flour-like raw materials |
DE19718259A1 (en) * | 1997-04-30 | 1998-11-05 | Kloeckner Humboldt Wedag | Process and plant for reducing pollutant cycles in the production of cement clinker from raw meal |
DE10158968A1 (en) * | 2001-11-30 | 2003-06-12 | Kloeckner Humboldt Wedag | Process for reducing emissions of the pollutants dioxins and / or furans in a cement clinker production line |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10327028B4 (en) * | 2003-06-16 | 2012-02-09 | Polysius Ag | Process and plant for heat treatment of mineral raw materials |
WO2008052942A2 (en) * | 2006-11-01 | 2008-05-08 | Solvay Chemicals, Inc. | Dust material heating process |
WO2008052942A3 (en) * | 2006-11-01 | 2009-04-09 | Solvay Chemicals Inc | Dust material heating process |
US7771690B2 (en) * | 2006-11-01 | 2010-08-10 | Solvay Chemicals, Inc. | Plenum crusher dust injection |
CN101573295B (en) * | 2006-11-01 | 2013-10-16 | 索尔维化学有限公司 | Dust material heating process |
DE102014108154A1 (en) * | 2014-06-10 | 2015-12-17 | Elex Cemcat Ag | Process for treating exhaust gas and plant with an exhaust gas treatment device |
WO2021204549A1 (en) * | 2020-04-08 | 2021-10-14 | Thyssenkrupp Industrial Solutions Ag | Method and device for the production of cement clinker |
BE1028193B1 (en) * | 2020-04-08 | 2021-11-09 | Thyssenkrupp Ind Solutions Ag | Method and device for the production of cement clinker |
Also Published As
Publication number | Publication date |
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DE10327028B4 (en) | 2012-02-09 |
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