EP0099281B1 - Verfahren zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett insbesondere von Brandschiefer oder bituminösem Tonschiefer - Google Patents

Verfahren zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett insbesondere von Brandschiefer oder bituminösem Tonschiefer Download PDF

Info

Publication number
EP0099281B1
EP0099281B1 EP83401189A EP83401189A EP0099281B1 EP 0099281 B1 EP0099281 B1 EP 0099281B1 EP 83401189 A EP83401189 A EP 83401189A EP 83401189 A EP83401189 A EP 83401189A EP 0099281 B1 EP0099281 B1 EP 0099281B1
Authority
EP
European Patent Office
Prior art keywords
fluidized bed
grate
zone
fluidization
fuel
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.)
Expired
Application number
EP83401189A
Other languages
English (en)
French (fr)
Other versions
EP0099281A1 (de
Inventor
Jean-Louis Bouju
Pascal Georges
Guy Lamusse
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to AT83401189T priority Critical patent/ATE15535T1/de
Publication of EP0099281A1 publication Critical patent/EP0099281A1/de
Application granted granted Critical
Publication of EP0099281B1 publication Critical patent/EP0099281B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/002—Fluidised bed combustion apparatus for pulverulent solid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/24—Devices for removal of material from the bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H11/00—Travelling-grates
    • F23H11/12—Travelling-grates inclined travelling grates; Stepped travelling grates

Definitions

  • the present invention relates to the combustion in a fluidized bed of lean fuels, in particular coal or bituminous shales.
  • An installation is advantageously used for this purpose, consisting of a substantially vertical front wall, provided with a fuel supply device in the form of particles, two side walls, a movable grid inclined upwards from front to rear. , said grid being arranged between the two side walls, at a certain distance from the latter, and a plurality of boxes for blowing air or any other oxidizing gas disposed under the grid.
  • An installation of this kind is described in patent FR-A-1,092,540.
  • Patent FR-A-1,440,039 describes a similar installation further comprising a plurality of valves, each of which being assigned to a box of particular blowing.
  • the difficulty is that the combustion temperature is often less than 1000 ° C and in any case less than the temperature necessary for the formation of agglomerates. It then becomes practically impossible to evacuate the ashes, or at least their evacuation results in the simultaneous evacuation of a relatively large quantity of unburnt materials. The thermal efficiency of combustion is very poor, which is all the more annoying the higher the ash content.
  • the object of the invention is essentially to overcome this difficulty.
  • the level and the extent of the fluidized bed are adjusted by modifying the position of said fixed point.
  • the speed of the grate is adjusted, for a given fuel flow rate and a given ash content, in order to obtain a minimum residence time of the fuel in the fluidized bed for complete combustion, and a predetermined thickness of the fixed layer of ash.
  • the level and the extent of the fluidized bed are adjusted by modifying the number of boxes put into service with a sufficient flow rate to cause fluidization, on the one hand, and the distribution of the air flow rate between said boxes, on the other hand go.
  • Figure 1 shows schematically in longitudinal section such an installation.
  • Figure 2 is a cross-sectional view of this installation.
  • the reference 1 designates the front wall 1 of the installation and the references 2 and 3 its side walls.
  • the wall 1 is provided with a pipe 4 for supplying fuel in the form of particles from a not shown crushing device.
  • a grid 5 inclined upwards from front to rear is arranged between the walls 2 and 3 at a certain distance from them.
  • This grid advantageously constituted by the upper strand of a endless chain, receives the fuel leaving the pipe 4.
  • the reference 6 designates the fuel slope formed against the wall 1
  • the references 7 and 8 designate the slope formed against the side walls 2 and 3.
  • the boxes 9a, 9b and 9c deliver an air flow sufficient to cause fluidization of the fuel in the bed 12 which forms above said boxes.
  • the boxes 9d and 9e deliver an amount of air insufficient to cause fluidization.
  • the area above the casing 9d constitutes an ash sedimentation area which will be discussed more explicitly below, while the area above the casing 9e constitutes, in a manner known per se, an area for transporting ash and unclog grid 5.
  • Each box is associated with a valve for adjusting the air flow rate coming from a fan, not shown, these valves are respectively marked 13a, 13b, 13c, 13d, 13e.
  • These valves make it possible to distribute the total air flow so that this flow decreases progressively from front to rear, which causes inside the bed 12, a methodical flow of fuel.
  • the term “methodical flow” is understood to mean a flow from the front to the rear at a speed such that the residence time of the fuel in the bed 12 is equal to the minimum necessary to ensure its complete combustion, while the only ashes are brought to the rear end of the bed 12 where they pass from the fluidization zone F to the sedimentation zone S.
  • the ashes are deposited along a slope 14 whose height is equal to that of the fixed layer extracted from the bed by the displacement of the grid 5 towards the transport zone T.
  • the embankment 14 extends over the entire length of the sedimentation zone S and it is renewed in successive sections as the grid advances .
  • the sedimentation zone S extends over the entire length of the box 9d, from a fixed point 15 materialized by the trace on the plane of the figure of the upper end of the front face of the box 9d.
  • the sedimentation zone S moves and no longer covers only the caisson 9c, the transport zone T covering the caissons 9d and 9e.
  • the sedimentation zone S moves and covers the only box 9e, while the very short transport zone T is devoid of boxes.
  • the level N and the extent of the fluidization zone F are therefore adjusted by modifying the position of point 15 by means of the valves 13a, 13b, 13c, 3d and 13e.
  • the speed of the grate can be adjusted for a given fuel flow rate and an ash content thereof, in order to act correlatively on the minimum stay time of the fuel in the bed 12 for combustion. complete, as well as to obtain a fixed layer of optimum thickness in the transport zone T.
  • the number of boxes may differ from five. It is even advantageous, to ensure a finer adjustment of the position of point 15, to provide, for a given grid length, a greater number of boxes of shorter length.
  • valves 13a, 13b, 13c, 13d, 13e adjustable according to the various parameters (ash content, speed of the grate, height of the layer, distribution of the air flow and fuel). These different parameters can be recorded on the panel of a control panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Claims (4)

1. Verfahren zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett, insbesondere von Brandschiefer oder bituminösem Tonschiefer, auf einem nach oben, von vorne nach hinten geneigten Rost (5), wobei Kästen (9a, 9b, 9c, 9d, 9e) zur Einblasung von Luft oder irgendeines anderen die Verbrennung bewirkenden Gases unterhalb des Rostes (5) angeordnet sind, der von vorne mit Brennstoff gespeist wird, der vordere Teil des Rostes eine Fluidisierungszone (F) bildet und der hintere Teil des Rostes auf einem höheren Niveau als das des Wirbelbettes (12) eine Transportzone (T) für die Asche unter der Form einer gleichbleibenden Schicht bildet, dadurch gekennzeichnet, daß:
- man von einem Festpunkt (15) aus hinter der Fluidisierungszone (F) eine für die Fluidisierung ungenügende Einblasung unterhält, so daß sich zwischen der Fluidisierungszone (F) und der Transportzone (T) eine dazwischenliegende Sedimentationszone (S) bildet, in der sich die Asche zu einer Böschung (14) absetzt, wobei die sich über die gesamte Länge der Sedimentationszone (S) erstreckende Böschung (14) sich in aufeinanderfolgenden parallelen Schichten je nach der Bewegung des Rostes (5) erneuert, und
- man die Einblaseluftmenge in die Kästen (9a, 9b, 9c, 9d, 9e) verteilt, um einen Gegenstrom des Brennstoffes im Wirbelbett (12) von vorne nach hinten zu bewirken, so daß die Zufuhr der Asche in die Sedimentationszone (S) zwecks deren Abzug ermöglicht wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Niveau (N) und die Ausdehnung des Wirbelbettes (12) durch Änderung der Lage des Festpunktes (15) regelt.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man die Geschwindigkeit des Rostes (5) für eine gegebene Brennstoffmenge und einen gegebenen Brennstoffaschengehalt regelt, um eine minimale Aufenthaltszeit des Brennstoffes im Wirbelbett (12) für eine vollständige Verbrennung sowie eine vorbestimmte, gleichbleibende Aschenschichtdicke zu erhalten.
4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß man das Niveau (N) und die Ausdehnung des Wirbelbettes (12) durch Änderung der Anzahl der Kästen (9a, 9b, 9c, 9d, 9e) die mit einer ausreichenden Luftmenge in Betrieb sind um eine Fluidisierung zu bewirken, einerseits, und die Verteilung der Luftmenge zwischen den Kästen, andererseits, regelt.
EP83401189A 1982-06-15 1983-06-10 Verfahren zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett insbesondere von Brandschiefer oder bituminösem Tonschiefer Expired EP0099281B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401189T ATE15535T1 (de) 1982-06-15 1983-06-10 Verfahren zur verbrennung von minderwertigen brennstoffen im wirbelbett insbesondere von brandschiefer oder bituminoesem tonschiefer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8210385A FR2528543A1 (fr) 1982-06-15 1982-06-15 Procede de combustion en lit fluidise de combustibles pauvres, notamment de schistes houillers ou bitumineux, et installation pour la mise en oeuvre de ce procede
FR8210385 1982-06-15

Publications (2)

Publication Number Publication Date
EP0099281A1 EP0099281A1 (de) 1984-01-25
EP0099281B1 true EP0099281B1 (de) 1985-09-11

Family

ID=9275002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401189A Expired EP0099281B1 (de) 1982-06-15 1983-06-10 Verfahren zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett insbesondere von Brandschiefer oder bituminösem Tonschiefer

Country Status (4)

Country Link
EP (1) EP0099281B1 (de)
AT (1) ATE15535T1 (de)
DE (1) DE3360786D1 (de)
FR (1) FR2528543A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553496B1 (fr) * 1983-10-13 1988-02-26 Fives Cail Babcock Dispositif de combustion en lit fluidise de combustibles pauvres, notamment de schistes houillers ou bitumineux
FR2578629B1 (fr) * 1985-03-11 1987-04-30 Fives Cail Babcock Dispositif de combustion ou de gazeification a lit fluidise comportant une chaine sans fin pour l'extraction des cendres
CN104848212B (zh) * 2015-05-27 2017-04-05 山西大学 一种煤矸石固硫控温燃烧与灰渣高效耦合利用的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1092540A (fr) * 1953-10-29 1955-04-22 Cie Ind De Procedes Et D Appli Perfectionnements aux procédés de réalisation de réactions chimiques en phase fluidisée et dispositif pour leur mise en oeuvre
FR1440039A (fr) * 1965-04-13 1966-05-27 Cie Ind De Procedes Et D Appli Grille mécanique à chaîne pendante pour la combustion en lit fluidisé
US3625164A (en) * 1971-04-21 1971-12-07 Air Prod & Chem Combustion of high-sulfur coal in a fluidized bed reactor
US3776150A (en) * 1972-03-06 1973-12-04 Awt Systems Inc Fluidized bed system for solid wastes
FR2261051B1 (de) * 1974-02-14 1980-08-08 Activit Sa

Also Published As

Publication number Publication date
DE3360786D1 (en) 1985-10-17
FR2528543A1 (fr) 1983-12-16
ATE15535T1 (de) 1985-09-15
FR2528543B1 (de) 1985-03-15
EP0099281A1 (de) 1984-01-25

Similar Documents

Publication Publication Date Title
EP1532411B1 (de) Vorrichtung zum trocknen von produkten wie insbesondere kläranlagenschlamm
FR2519877A1 (fr) Grille de fluidisation ainsi que foyer de combustion a grille inferieure de soufflage d'air et procede de traitement de matiere particulaire dans une chambre de fluidisation et/ou d'entrainement
FR2558241A1 (fr) Chaudiere a bois comportant une chambre de prechauffage du comburant
EP0099281B1 (de) Verfahren zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett insbesondere von Brandschiefer oder bituminösem Tonschiefer
CH639187A5 (fr) Chaudiere, notamment pour installation de chauffage.
FR2487847A1 (fr) Procede et installation de gazeification de matieres d'origine vegetale
EP0138692B1 (de) Vorrichtung zur Verbrennung von minderwertigen Brennstoffen im Wirbelbett, insbesondere von Brandschiefer oder bituminösem Tonschiefer
FR2850157A1 (fr) Reacteur a lit fluidise a circulation
EP0123596B1 (de) Wirbelvorrichtung mit innerem Wärmetauscher
FR2635274A1 (fr) Appareil a lit fluidise en circulation
FR2601933A1 (fr) Installation d'evacuation pour silos contenant des produits en vrac evacues par de l'air souffle
FR2463360A1 (fr) Installation de combustion a combustibles solides
FR2896709A1 (fr) Separateur de solides en particulier pour installation de combustion
EP4055325B1 (de) Verbrennungsvorrichtung
FR2555710A1 (fr) Procede pour la combustion ou la gazeification en lit fluidise de combustibles solides et dispositif pour la mise en oeuvre de ce procede
FR3101395A1 (fr) Système de gazéification et/ou de combustion équipant une installation de gazéification et/ou de combustion
EP0094893B1 (de) Verfahren und Vorrichtung zur Behandlung eines festen kleinstückigen Materials
FR2547393A1 (fr) Chambre de combustion pour combustibles solides
FR2542066A1 (fr) Procede pour bruler des charbons gonflants en lit fluidise a grille mecanique mobile, et foyer adapte a la mise en oeuvre de ce procede
FR2508140A1 (fr) Installation de chauffage a combustible solide par exemple pulverulent, comportant un dispositif de fond de foyer ajoure
BE532757A (de)
EP2573462A1 (de) Heizanlage für Festbrennstoff vom Typ individualisierte Elemente
BE518026A (de)
BE518024A (de)
FR2549939A1 (fr) Chaudiere a chargement automatique pour combustibles a base de bois fragmente

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19840210

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 15535

Country of ref document: AT

Date of ref document: 19850915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3360786

Country of ref document: DE

Date of ref document: 19851017

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19940428

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19940524

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19940531

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940601

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19940607

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19940624

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19940630

Year of fee payment: 12

EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940829

Year of fee payment: 12

EAL Se: european patent in force in sweden

Ref document number: 83401189.2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950610

Ref country code: GB

Effective date: 19950610

Ref country code: AT

Effective date: 19950610

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19950630

Ref country code: CH

Effective date: 19950630

Ref country code: BE

Effective date: 19950630

BERE Be: lapsed

Owner name: FIVES-CAIL BABCOCK S.A.

Effective date: 19950630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950610

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960301

EUG Se: european patent has lapsed

Ref document number: 83401189.2