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WO2018083059A1 - Four à étages et procédé permettant de faire fonctionner un four à étages - Google Patents

Four à étages et procédé permettant de faire fonctionner un four à étages Download PDF

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Publication number
WO2018083059A1
WO2018083059A1 PCT/EP2017/077753 EP2017077753W WO2018083059A1 WO 2018083059 A1 WO2018083059 A1 WO 2018083059A1 EP 2017077753 W EP2017077753 W EP 2017077753W WO 2018083059 A1 WO2018083059 A1 WO 2018083059A1
Authority
WO
WIPO (PCT)
Prior art keywords
fired
floors
solid fuel
burner
floor
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
PCT/EP2017/077753
Other languages
German (de)
English (en)
Inventor
Heinz TÖLKE
Christoph Beyer
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.)
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions 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 ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Priority to EP17800726.6A priority Critical patent/EP3535537A1/fr
Priority to CN201780068241.1A priority patent/CN109923362A/zh
Publication of WO2018083059A1 publication Critical patent/WO2018083059A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
    • F27B9/18—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path under the action of scrapers or pushers
    • F27B9/185—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path under the action of scrapers or pushers multiple hearth type furnaces
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners

Definitions

  • the invention relates to a multi-level multi-fired oven and a method for operating such a multi-level oven.
  • Deck ovens are used for heat treatment of various materials such as clay, dolomite, magnesite rock or lime. Further, for example, aluminum, coke, iron oxide and oil sludge are treated in deck ovens.
  • a multi-level oven consists of several superimposed floors, which are passed through successively from top to bottom of the material to be treated. At least some floors are operated with a gaseous or liquid fuel.
  • the invention has for its object to provide a respect of the energy costs improved multi-level oven and a corresponding method for operating a multi-level oven.
  • the inventive method for operating a bunk oven uses several fired floors, wherein at least one solid fuel and at least one gaseous and / or liquid fuel are used.
  • the multi-deck oven according to the invention provides for several fired floors, at least one of the fired floors being equipped with a gas or liquid burner, and at least one of the fired floors being equipped with at least one solid fuel burner.
  • At least the uppermost and the lowest of the fired floors are operated with the gaseous and / or liquid fuel.
  • the gaseous and / or liquid fuel In this way it can be ensured that no unburned particles of the solid fuel are discharged at the upper or lower end of the furnace.
  • at least a part, preferably the predominant part, most preferably all provided between the uppermost and the lowest firing floor, fired floors can be operated with the solid fuel.
  • Solid fuels are usually cheaper than liquid or gaseous fuels, in particular cheaper than the natural gas commonly used. This is especially the case if suburb already coal preparation is available. The fuel costs can be further reduced if as many of the fired floors as possible are operated with the solid fuel.
  • each fired stage may contain at least one, preferably at least two, most preferably at least three or more four burners, operated.
  • only one type of fuel ie either a solid fuel or a gaseous or a liquid fuel can be used per fired level.
  • at least one of the fired floors at least two different fuels are used. This can be useful, in particular, if the most complete possible burnout of the introduced fuel is to be ensured.
  • the multi-level oven has 15, 18 or more floors, at least 5 floors are expediently operated with at least one solid fuel burner, preferably at least 3 solid fuel burners.
  • solid fuel in particular ground coal, comminuted, renewable raw materials, Torrefizêtides material or mixtures thereof can be used.
  • the solid fuel should desirably have a calorific value of at least 8MJ, preferably more than 15MJ, most preferably more than 25MJ.
  • a particularly good distribution of the fuel can be achieved in that the solid fuel, preferably a biogenic fuel, together with the material to be treated is given to the furnace and at least partially burns at least from the first fired floor.
  • Fig.l is a schematic representation of the oven according to the invention.
  • Fig. 2 is a schematic sectional view in the area of a fired with four solid fuel burner floor.
  • Figure 1 shows a multi-level oven 1 with six fired levels 2.1 - 2.6.
  • an inlet 3 is provided for the material 4 to be treated.
  • suitable materials include all suitable materials, such as clay, dolomite, magnesite or lime, but also, for example, aluminum, coke, iron oxide and oil sludge into consideration.
  • a suitable transport system (not shown) is provided, with which the material to be treated 4 is promoted from floor to floor.
  • the transport system may, for example, comprise a plurality of Krählarmen equipped with Krählzähnen, which are driven by a central column 5 and the material to the outlet of each Floor lead.
  • outlet openings of successive floors are alternately arranged on the outer circumference or in the region of the central column, so that the material is transported in one floor from the inside to the outside and in the next lower floor from outside to inside.
  • an outlet 6 for the heat-treated material 7 is provided at the lower end of the bunker.
  • the uppermost (fired) floor 2.1 and the lowermost (fired) floor 2.6 are operated in the illustrated embodiment with a gaseous fuel (8), for example natural gas, which is fed to the gas burners 10, 11 via a gas control line 9.
  • a gaseous fuel for example natural gas
  • the middle floors 2.2, 2.3, 2.4 and 2.5 are operated in the illustrated embodiment with a solid fuel 12, which is fed from a reservoir 13 via a metering unit 15 operated with transport air 14 the solid fuel burners 16-19.
  • the preparation of the solid fuel takes place in a suitable manner, for example with an optional grinding or comminution unit 20 and / or an optional Torrefiz istsaggregat 21st
  • each fired floor or burner is supplied with combustion air (not shown) to provide the oxygen required for combustion.
  • the combustion exhaust gases can be discharged either via exhaust gas outlet openings in the individual floors and / or via at least one exhaust gas outlet opening 22 provided centrally at the upper end of the stack furnace 1.
  • Unfired floors for preheating for example, and unfurned floors at the bottom for cooling the material may be available at the top.
  • FIG. 2 shows a possible arrangement of four solid fuel burners 16a-16d in the area of the floor 2.2.
  • the solid fuel burner are evenly distributed on the outer periphery of the floor.
  • Each of the solid fuel burner is slightly oblique to the radial direction and aligned in the direction of rotation 23 of the Krählarme. This orientation of the burner causes a better and more even distribution of energy in the furnace chamber and thus an optimal treatment of the current flow.
  • the deck oven is variable in size and can have 10, 15, 18 and more floors. Depending on the size of the deck oven then the top 2, 3 or 4 floors for material preheating and the bottom 2, 3, or 4 floors for cooling the material flow be used. It would also be conceivable, however, that all floors are operated with the appropriate fuels, so that a preheating zone and / or the cooling zone omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner un four à étages, le procédé utilisant plusieurs étages alimentés en combustible, dont au moins un combustible solide et au moins un combustible gazeux et/ou liquide. Le four à étages selon l'invention présente plusieurs étages alimentés en combustible, au moins un des étages alimenté en combustible étant muni d'un brûleur à gaz ou à liquide et au moins un des étages alimentés en combustible étant en outre muni d'un brûleur à solides.
PCT/EP2017/077753 2016-11-02 2017-10-30 Four à étages et procédé permettant de faire fonctionner un four à étages Ceased WO2018083059A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17800726.6A EP3535537A1 (fr) 2016-11-02 2017-10-30 Four à étages et procédé permettant de faire fonctionner un four à étages
CN201780068241.1A CN109923362A (zh) 2016-11-02 2017-10-30 多膛炉和用于运行多膛炉的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016120833.7 2016-11-02
DE102016120833.7A DE102016120833A1 (de) 2016-11-02 2016-11-02 Etagenofen und Verfahren zum Betreiben eines Etagenofens

Publications (1)

Publication Number Publication Date
WO2018083059A1 true WO2018083059A1 (fr) 2018-05-11

Family

ID=60387986

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/077753 Ceased WO2018083059A1 (fr) 2016-11-02 2017-10-30 Four à étages et procédé permettant de faire fonctionner un four à étages

Country Status (4)

Country Link
EP (1) EP3535537A1 (fr)
CN (1) CN109923362A (fr)
DE (1) DE102016120833A1 (fr)
WO (1) WO2018083059A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170310B (de) * 1962-12-18 1964-05-14 Kloeckner Humboldt Deutz Ag Etagenofen zum Brennen von Kohleton
GB2168797A (en) * 1984-12-19 1986-06-25 Edward Koppelman Multiple hearth reactor
EP0843142A1 (fr) * 1996-10-25 1998-05-20 Praxair Technology, Inc. Appareil et méthode pour l'injection d'oxygène dans un four à soles tournantes multiples
WO2000017404A1 (fr) * 1998-09-23 2000-03-30 Paul Wurth S.A. Procede de production de metal directement desoxyde dans un four a etages
WO2001031070A1 (fr) * 1999-10-25 2001-05-03 Paul Wurth S.A. Four a etageres
CN204438139U (zh) * 2014-12-11 2015-07-01 北京瑞克森地环保技术有限公司 多膛炉污泥焚烧设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511281A (en) * 1945-05-03 1950-06-13 Warren S Martin Apparatus for converting material
ATE217350T1 (de) * 1997-12-10 2002-05-15 Wurth Paul Sa Verfahren zum herstellen von direkt reduziertem eisen in einem etagenofen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170310B (de) * 1962-12-18 1964-05-14 Kloeckner Humboldt Deutz Ag Etagenofen zum Brennen von Kohleton
GB2168797A (en) * 1984-12-19 1986-06-25 Edward Koppelman Multiple hearth reactor
EP0843142A1 (fr) * 1996-10-25 1998-05-20 Praxair Technology, Inc. Appareil et méthode pour l'injection d'oxygène dans un four à soles tournantes multiples
WO2000017404A1 (fr) * 1998-09-23 2000-03-30 Paul Wurth S.A. Procede de production de metal directement desoxyde dans un four a etages
WO2001031070A1 (fr) * 1999-10-25 2001-05-03 Paul Wurth S.A. Four a etageres
CN204438139U (zh) * 2014-12-11 2015-07-01 北京瑞克森地环保技术有限公司 多膛炉污泥焚烧设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ROTH J L ET AL: "PRIMUS, A NEW PROCESS FOR RECYCLING BY-PRODUCTS AND PRODUCING VIRGIN IRON//PRIMUS, UN NOUVEAU PROCEDE POUR LE RECYCLAGE DES COPRODUITS ET LA PRODUCTION DE FONTE", REVUE DE METALLURGIE - CAHIERS D'INFORMATIONS TECHNIQUES, REVUE DE METALLURGIE. PARIS, FR, vol. 98, no. 11, 1 November 2001 (2001-11-01), pages 987 - 996, XP001101771, ISSN: 0035-1563, DOI: 10.1051/METAL:2001140 *

Also Published As

Publication number Publication date
CN109923362A (zh) 2019-06-21
DE102016120833A1 (de) 2018-05-03
EP3535537A1 (fr) 2019-09-11

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