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WO2002046671A1 - Installation et procede de traitement thermique d'une matiere en morceaux - Google Patents

Installation et procede de traitement thermique d'une matiere en morceaux Download PDF

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Publication number
WO2002046671A1
WO2002046671A1 PCT/EP2001/008312 EP0108312W WO0246671A1 WO 2002046671 A1 WO2002046671 A1 WO 2002046671A1 EP 0108312 W EP0108312 W EP 0108312W WO 0246671 A1 WO0246671 A1 WO 0246671A1
Authority
WO
WIPO (PCT)
Prior art keywords
fine
classifier
sieve
preheated
air
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/EP2001/008312
Other languages
German (de)
English (en)
Inventor
Norbert Patzelt
Thomas Schmitz
Reinhold Gebbe
Wilfried Kreft
Sebastian Mainusch
Uwe Schuh
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 Industrial Solutions AG
Original Assignee
Krupp Polysius AG
Polysius 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 Krupp Polysius AG, Polysius AG filed Critical Krupp Polysius AG
Priority to AU2001279761A priority Critical patent/AU2001279761A1/en
Publication of WO2002046671A1 publication Critical patent/WO2002046671A1/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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for 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

Definitions

  • the invention relates to a plant and a method for the thermal treatment of lumpy material, such as limestone, cement raw material or the like.
  • thermo treatment of such material it is first preheated in a preheater using hot gas, for which purpose in particular the exhaust gas from the subsequent combustion process is used.
  • the preheated material then goes to a furnace for firing, in particular a rotary kiln.
  • the preheated material contains a certain proportion of relatively fine particles, which can arise, for example, from the treatment of the material in the preheater, in particular due to friction. After the hot gas of the preheater is mostly formed by the dust-laden furnace exhaust gas, the proportion of fines in the preheated material is increased as the material flows through the preheater.
  • the proportion of very fine material in the preheated material is undesirable for the firing process in the furnace in two ways.
  • the operation of the furnace is adversely affected by the development of dust and, in addition, caking can easily occur in the region of the furnace or the flue pipes.
  • the very fine particles have a relatively high concentration of undesirable substances, for example sulfur.
  • a known method for removing the fine material from the preheated material consists of a mechanical fine screen, which is installed in the connecting device from the preheater to the furnace. This separates coarse material from fine material, the coarse material entering the furnace and the fine material being removed.
  • this method has the disadvantage that caking occurs on the sieve in a relatively short time, so that the sieve loses its actual function.
  • the preheated material has a temperature of between approximately 700 and 900 ° C.
  • the small mesh width used can also cause deformation of the sieve, which likewise impair the sieve function.
  • EP-B-0 767 764 therefore proposes to feed the preheated material from above to a separation device, a counterflow gas stream which runs from bottom to top and which leads a
  • Material stream contains entrained fine fraction, which is discharged from gas and the fine fraction suspension at the top of the device, and the coarse fraction is dropped from the bottom of the device into a burning zone.
  • This separation device is part of the connection device between the preheater and the furnace.
  • the object of the invention is therefore to operate the plant and the method for the thermal treatment of lumpy material more efficiently.
  • the plant for the thermal treatment of lumpy material essentially consists of a preheater for preheating the material, an oven for burning the preheated material and a screen arranged between the preheater and the oven, the preheated material passing through the screen into a main stream with coarse material and a bypass with fine material is separated and the coarse material is fed to the furnace.
  • the screen is also followed by a classifier in the secondary flow, which classifies the fine material.
  • the classifier is designed as an airflow classifier, which has one or more inlets for the fine material coming from the sieve and for the classifying air and one or more outlets for the coarser class and for the mixture of classifying air and very fine material.
  • the sieve is preferably designed so that at least 70% by volume, preferably 70 to 90% by volume, of the preheated material is sieved out as coarse material. Accordingly, 30 to 10% by volume of the preheated material reaches the classifier as fine material. If the lumpy material is limestone, the sieve is designed so that the grain size of the fine material is less than 10 mm, preferably less than 5 mm.
  • Another advantage of this sieve configuration is the advantageous deagglomeration of the partially agglomerated material that is fed to the sieve. Material.
  • the material is first preheated in a preheater, then the preheated material is separated into a main flow with coarse material and a secondary flow with fine material, and finally the coarse material in an oven ' fed.
  • the fine material is sifted through the bypass into fine and coarser material, the coarser material also being fed to the furnace.
  • the sieve can be designed so that approximately 10 to 30 vol. The majority of the preheated goods, ie 70 to 90 vol .-%, thus go directly into the oven. Due to the fine material content of 10 to 30% by volume of the preheated material, the sieve can be designed with a correspondingly large mesh width, so that when using cement raw material, the grain size of the fine material is less than 10 mm, preferably less than 5 mm, and thus eliminates sieve blockages become. The aggregates and lines in the secondary flow are thus only exposed to about 10 to 30% by volume of the preheated material and can accordingly be designed and optimized with smaller line cross sections.
  • the sifter After the sifter has already been sieved, it can be adjusted to the grain size of the fines, which enables a much more efficient sifting.
  • the fine material / air mixture leaving the classifier is fed to a cyclone which separates the fine material. This can then be used separately or in part in the subsequent firing process.
  • the sifting air loaded with the fine material or the cyclone exhaust air is then fed to a dedusting device.
  • Show in the drawing 1 shows a schematic representation of the plant for the thermal treatment of lumpy material
  • FIG..3 is a partial schematic view of the An ⁇ , wherein the separator is a cyclone in connection with.
  • the plant schematically shown in Fig.l for the thermal treatment of lumpy material consists essentially of a preheater 1 for preheating the material by means of hot gas, an oven 2, in particular a rotary kiln, for burning the preheated Material and a sieve 3 arranged between the preheater and the furnace.
  • the preheater 1 where. it is, for example, a shaft preheater, hot gas flows through it from bottom to top, the hot gas mostly being formed by the furnace exhaust gases from the furnace 2.
  • the furnace exhaust gases are fed to the lower end of the preheater via a hot gas line 4.
  • the cooled hot gas is discharged at the upper end of the preheater (arrow 5).
  • the lumpy material to be thermally treated is given up in the upper region of the preheater 1 (arrow 6) and is exposed to the hot gas in the interior of the preheater, so that the material heats up increasingly.
  • the preheated reaches the lower end of the preheater 1 Material via a chute 7 or another connecting device onto the sieve 3.
  • the screen 3 has a coarse material outlet 3a for a main flow (arrow 12) with coarse material and a fine material outlet 3b for a secondary flow (arrow 13) with fine material, the coarse material outlet 3a being connected to the furnace 2 via a connecting device 8.
  • the system also has a classifier 9, which is designed here as an airflow classifier and a first inlet 9a for the fine material coming from the sieve 3, a second inlet 9b for the classifying air, a first outlet 9c for the coarser material and a second outlet 9d for provides the mixture of air and fine material.
  • a classifier 9 which is designed here as an airflow classifier and a first inlet 9a for the fine material coming from the sieve 3, a second inlet 9b for the classifying air, a first outlet 9c for the coarser material and a second outlet 9d for provides the mixture of air and fine material.
  • the second outlet 3b of the screen 3 is connected to the first inlet 9a of the classifier 9. Furthermore, the coarser material is passed from the first exit 9c of the view 9 to the furnace 2 or to the connecting device 8 coming from the first exit of the sieve 3.
  • the visual air supplied via the second inlet 9b can optionally be formed by fresh air, preheater exhaust air and / or furnace exhaust gases.
  • the classifier 9 is shown schematically as a static air flow classifier.
  • the fine material of the sieve 3 fed in via the inlet 9a first reaches the interior of the classifier via a chute, the visual air being fed in via the inlet 9b in the region of the chute.
  • the fine material is carried upwards in co-current with the classifying air and is guided there through a guide vane ring 9e into the interior of the classifier.
  • the actual screening process then takes place in the interior of the guide vane ring 9e, the very fine material being discharged together with the screening air via the second outlet 9d, while the remaining coarser components reach the first outlet 9c via an inner funnel.
  • the sighting can be set relatively sensitively.
  • a rotating inner guide vane rotor ensures additional advantageous classifying results.
  • the mixture of classifying air and very fine material is fed from the second outlet 9d to a dedusting device, not shown.
  • the mixture of very fine material and classifying air (arrow 14) leaving the classifier 9 is fed to a cyclone 10 via an inlet 10a.
  • the very fine material is separated in the cyclone, so that the screening result, e.g. a special grain fraction tion, for example, a separate use (arrow 11a) or partially the subsequent burning process (arrow 11b) can be supplied.
  • the cyclone exhaust air is fed via the second outlet 10b to a dedusting device, not shown.
  • the mesh size of the screen should be selected so that at least 70% by volume, in particular approximately 70 to 90% by volume, of the preheated material is screened out as coarse material. In other words, 30 to 10% by volume of the preheated material reaches the classifier as fine material. With thermal treatment of limestone, this corresponds to a grain size of the fine material of less than 5 to 10 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne une installation et un procédé de traitement thermique d'une matière en morceaux. L'installation comprend un préchauffeur (1) servant à préchauffer la matière, un four (2) permettant de cuire la matière préchauffée, ainsi qu'un tamis (3) disposé entre le préchauffeur et le four, la matière préchauffée étant séparée par le tamis en un flux principal de matière grossière (12) et un flux secondaire de matière fine (13) et la matière grossière étant acheminée dans le four. Par ailleurs, un cribleur (9) est placé en aval du tamis dans le flux secondaire, ce cribleur triant la matière fine en une matière ultrafine et une matière plus grossière, cette dernière étant également acheminée dans le four.
PCT/EP2001/008312 2000-12-05 2001-07-18 Installation et procede de traitement thermique d'une matiere en morceaux Ceased WO2002046671A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001279761A AU2001279761A1 (en) 2000-12-05 2001-07-18 Installation and method for the thermal treatment of pellet-type material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10060381.5 2000-12-05
DE2000160381 DE10060381B4 (de) 2000-12-05 2000-12-05 Anlage und Verfahren zur thermischen Behandlung von stückigem Material

Publications (1)

Publication Number Publication Date
WO2002046671A1 true WO2002046671A1 (fr) 2002-06-13

Family

ID=7665840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/008312 Ceased WO2002046671A1 (fr) 2000-12-05 2001-07-18 Installation et procede de traitement thermique d'une matiere en morceaux

Country Status (3)

Country Link
AU (1) AU2001279761A1 (fr)
DE (1) DE10060381B4 (fr)
WO (1) WO2002046671A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016120253A1 (fr) * 2015-01-28 2016-08-04 Thyssenkrupp Industrial Solutions Ag Procédé de traitement thermique d'une matière de départ
CN109231855A (zh) * 2018-10-23 2019-01-18 江苏中圣园科技股份有限公司 细料协同煅烧的回转窑分级煅烧系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009018099B4 (de) 2009-04-20 2013-01-17 Thyssenkrupp Polysius Ag Anlage zur Wärmebehandlung von stückigem Feststoff

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB994767A (en) * 1964-03-13 1965-06-10 Smidth & Co As F L Methods of and plants for burning cement
US4497761A (en) * 1980-06-02 1985-02-05 Krupp Polysius Ag Process for the production of sintered magnesite from magnesium hydroxide
US5173044A (en) * 1990-05-15 1992-12-22 F. L. Smidth & Co. A/S Method and apparatus for the manufacture of clinker of mineral raw materials
EP0767764A1 (fr) * 1994-06-29 1997-04-16 F.L. Smidth & Co. A/S Installation pour un traitement thermique de materiaux en morceaux

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852754A1 (de) * 1978-12-06 1980-06-19 Krupp Polysius Ag Verfahren zur waermebehandlung von feinkoernigem gut
DE3633588A1 (de) * 1986-10-02 1988-04-14 Krupp Polysius Ag Verfahren und vorrichtung zur herstellung von zementklinker
EP0908674A1 (fr) * 1997-10-13 1999-04-14 Asea Brown Boveri AG Procédé pour la combustion de déchets dans un incinérateur et pour le traitement des scories provenants de l'incinération

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB994767A (en) * 1964-03-13 1965-06-10 Smidth & Co As F L Methods of and plants for burning cement
US4497761A (en) * 1980-06-02 1985-02-05 Krupp Polysius Ag Process for the production of sintered magnesite from magnesium hydroxide
US5173044A (en) * 1990-05-15 1992-12-22 F. L. Smidth & Co. A/S Method and apparatus for the manufacture of clinker of mineral raw materials
EP0767764A1 (fr) * 1994-06-29 1997-04-16 F.L. Smidth & Co. A/S Installation pour un traitement thermique de materiaux en morceaux
US5775890A (en) * 1994-06-29 1998-07-07 F. L. Smidth & Co. A/S Plant for heat treatment of lumpy material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016120253A1 (fr) * 2015-01-28 2016-08-04 Thyssenkrupp Industrial Solutions Ag Procédé de traitement thermique d'une matière de départ
CN109231855A (zh) * 2018-10-23 2019-01-18 江苏中圣园科技股份有限公司 细料协同煅烧的回转窑分级煅烧系统

Also Published As

Publication number Publication date
AU2001279761A1 (en) 2002-06-18
DE10060381B4 (de) 2007-10-18
DE10060381A1 (de) 2002-06-13

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