EP0498014B1 - Procédé pour l'admission d'air de combustion et installation de chauffage - Google Patents

Procédé pour l'admission d'air de combustion et installation de chauffage Download PDF

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Publication number
EP0498014B1
EP0498014B1 EP91101711A EP91101711A EP0498014B1 EP 0498014 B1 EP0498014 B1 EP 0498014B1 EP 91101711 A EP91101711 A EP 91101711A EP 91101711 A EP91101711 A EP 91101711A EP 0498014 B1 EP0498014 B1 EP 0498014B1
Authority
EP
European Patent Office
Prior art keywords
grate
combustion air
exhaust gas
air
primary
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 - Lifetime
Application number
EP91101711A
Other languages
German (de)
English (en)
Other versions
EP0498014B2 (fr
EP0498014A1 (fr
Inventor
Johannes Dipl.-Ing. Martin
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.)
Martin GmbH fuer Umwelt und Energietechnik
Original Assignee
Martin GmbH fuer Umwelt und Energietechnik
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8206382&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0498014(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Martin GmbH fuer Umwelt und Energietechnik filed Critical Martin GmbH fuer Umwelt und Energietechnik
Priority to DK91101711.9T priority Critical patent/DK0498014T3/da
Priority to EP91101711A priority patent/EP0498014B2/fr
Priority to ES91101711T priority patent/ES2055466T5/es
Priority to DE59101576T priority patent/DE59101576D1/de
Priority to AT9191101711T priority patent/ATE105396T1/de
Priority to US07/829,963 priority patent/US5241916A/en
Priority to CA002060776A priority patent/CA2060776C/fr
Priority to BR929200411A priority patent/BR9200411A/pt
Priority to JP4022421A priority patent/JP2575256B2/ja
Priority to TW081105748A priority patent/TW201814B/zh
Publication of EP0498014A1 publication Critical patent/EP0498014A1/fr
Publication of EP0498014B1 publication Critical patent/EP0498014B1/fr
Priority to JP7192774A priority patent/JP2650879B2/ja
Publication of EP0498014B2 publication Critical patent/EP0498014B2/fr
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B7/00—Combustion techniques; Other solid-fuel combustion apparatus
    • F23B7/002—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements
    • F23B7/007—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements with fluegas recirculation to combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • F23B1/18—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support using inclined grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L1/00—Passages or apertures for delivering primary air for combustion 
    • F23L1/02—Passages or apertures for delivering primary air for combustion  by discharging the air below the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire

Definitions

  • the invention relates to a method for combustion air supply in grate furnaces, in which primary combustion air is introduced through the fuel and secondary combustion air directly into the exhaust gas stream, and in which a part of the exhaust gas is branched off from the exhaust gas stream and fed back to the combustion process, the exhaust gas immediately above the fuel in the area of a high unused primary air portion and sucked back to the combustion air.
  • the invention also relates to a firing system for carrying out the method.
  • This increased exhaust gas volume requires a larger design of the device downstream of the firing grate, e.g. Waste heat boilers and emission control devices.
  • the object of the invention is to provide a method and a firing system for carrying out the method, with the aid of which the amount of exhaust gas flow and thus the disadvantageous consequences resulting from the air excess explained can be reduced.
  • Another advantage of this mode of operation according to the invention is a reduction in pollutant emissions of carbon monoxide and nitrogen oxides.
  • carbon monoxide this effect is based on the one hand on more intensive post-combustion of a gas stream that is relatively highly contaminated with this pollutant.
  • nitrogen oxides the observed decrease in concentration can be explained by lowering the oxygen content in the exhaust gas.
  • the amount of exhaust gas withdrawn can be mixed with the primary combustion air and the secondary combustion air.
  • the amount of gas extracted is used exclusively as secondary combustion air, since the proportion of combustion air that is fed into the rear grate area and is then extracted corresponds relatively exactly to the proportion of quantity that is required as secondary combustion air.
  • the amount of exhaust gas drawn off corresponds to the volume after that primary air which is supplied in the rear primary air zones and which has a high unused primary air proportion, the achievable benefit can be maximized.
  • the volume of exhaust gas drawn off is less or greater in volume than the amount of primary air which is fed to the firing grate in the rear primary air zones which have a high unused primary air content.
  • a firing system has a feed hopper 1 with a subsequent feed chute 2 for feeding the fired goods onto a feed table 3, on which loading pistons 4 are provided so as to be movable back and forth in order to feed the firing material coming from the feed chute 2 onto a firing grate 5 , on which the combustion of the fired material takes place, it is irrelevant whether it is an inclined or horizontal grate, regardless of which principle.
  • a device for supplying primary combustion air, which can comprise a plurality of chambers 7 to 11, to which primary combustion air is supplied by means of a fan 12 via a line 13.
  • the arrangement of the chambers 7 to 11 divides the firing grate into several underwind zones, so that the primary combustion air can be set differently according to the needs on the firing grate.
  • the combustion chamber 14 which merges in the front part into an exhaust gas duct 15 to which units, not shown, such as e.g. B. connect a waste heat boiler and an exhaust gas cleaning system.
  • the combustion chamber 14 is delimited by a ceiling 16, a rear wall 17 and side walls 18, the latter being particularly evident from FIG. 3.
  • the combustion of the material to be labeled 19 takes place on the front part of the grate 5, above which the exhaust gas duct 15 is located. In this area, most of the primary combustion air is supplied through the chambers 7, 8 and 9. On the rear part of the combustion grate 5 there is only burned-out firing material, i. H. Slag and in this area primary combustion air is supplied via the chambers 10 and 11 essentially only for cooling this slag and in particular for cooling the grate in order to maintain its operability.
  • nozzles 21 and 22 are provided, which feed the secondary combustion air to the rising exhaust gas in order to cause intensive combustion of the combustible components in the exhaust gas.
  • exhaust gas is now extracted essentially in the rear part of the combustion chamber, which is delimited by the ceiling 16, the rear wall 17 and the side walls 18.
  • a suction opening 23 is provided in the ceiling 16 in the exemplary embodiment according to FIG. 1, so that exhaust gas can be sucked off via a suction line 24 by means of a fan 25, which is connected to the suction side of the fan.
  • a line 26 is connected to the pressure side of the fan, which presses the exhaust gas quantity extracted into line 13, via which the primary combustion air is supplied to the chambers 7 to 11.
  • the suction opening 23 is provided in the rear wall 17.
  • the line 26 connected to the pressure side of the fan 25 is connected, for example, to the nozzle 21, which is used to supply part of the secondary combustion air.
  • FIG. 3 shows the arrangement of two suction openings 23 in the side walls 18 of the combustion chamber 14, the connected suction lines 24 of which are connected to the suction side of the fan 12.
  • the suction lines have pipe sockets 27 with butterfly valves 28, through which additional fresh air can be drawn in and mixed with the exhaust gas.

Claims (11)

1. Procédé d'alimentation en air de combustion, pour la combustion sur grille, par lequel l'air primaire de combustion est introduit à travers le combustible et l'air secondaire de combustion est introduit directement dans le courant des gaz de combustion, et par lequel, en outre, une partie des gaz de combustion est dérivée et ramenée de nouveau dans le cycle de combustion, par lequel les gaz de combustion sont aspirés, juste au-dessus du combustible, dans la zone d'une proportion élevée d'air primaire non utilisée, et ramenés dans l'air de combustion, caractérisé en ce que l'air de combustion peut être réduit en fonction de la quantité de gaz de combustion mélangée avec l'air de combustion, en ce que tout le débit de gaz de combustion peut être réduit dans la proportion de la quantité aspirée dans la zone arrière du foyer et réintroduite dans l'air de combustion.
2. Procédé selon la revendication 1, caractérisé en ce que la quantité de gaz de combustion aspirée est mélangée avec l'air primaire de combustion.
3. Procédé selon la revendication 1, caractérisé en ce que la quantité de gaz de combustion aspirée est mélangée avec l'air secondaire de combustion.
4. Procédé selon la revendication 1, caractérisé en ce que, dans la combustion de déchets ménagers, la quantité de gaz de combustion aspirée est utilisée exclusivement comme air secondaire de combustion.
5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la quantité de gaz de combustion aspirés correspond en volume à celle de l'air primaire de combustion, qui est amenée à la grille de combustion dans les zones arrière d'air primaire qui présentent une forte proportion d'air primaire de combustion non utilisée.
6. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la quantité de gaz de combustion aspirée est inférieure en volume à la quantité d'air primaire de combustion, qui est amenée à la grille de combustion dans les zones arrière d'air primaire qui présentent une forte proportion d'air primaire de combustion non utilisée.
7. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la quantité de gaz de combustion aspirée est supérieure en volume à la quantité d'air primaire de combustion, qui est amenée à la grille de combustion, dans les zones arrière d'air primaire, qui présentent une forte proportion d'air primaire de combustion non utilisée.
8. Installation de combustion pour la réalisation du procédé selon la revendication 1 ou 2 avec une grille de combustion (5), une installation (7 à 11) sous la grille de combustion (5) pour l'amenée d'air primaire de combustion à travers la grille de combustion (5), ainsi que les tuyères (21,22) débouchant dans la chambre de combustion (14) au-dessus de la grille de combustion (5) pour l'amenée d'air de combustion secondaire, installation dans laquelle est prévue au moins une conduite d'aspiration de gaz de combustion (23, 24) dans la chambre de combustion (14) au-dessus de la grille de combustion (5), caractérisée en ce que la conduite d'aspiration (24) est reliée avec le côté aspiration d'un ventilateur (25) et dont le côté refoulement est relié avec une conduite (13) pour air de combustion primaire par l'intermédiaire d'une conduite (26).
9. Installation de combustion pour la réalisation du procédé selon les revendications 1 et 3 ou 4 avec une grille de combustion (5), une installation (7 à 11) sous la grille de combustion (5) pour l'amenée d'air primaire de combustion à travers la grille de combustion (5), ainsi que les tuyères (21, 22) débouchant dans la chambre de combustion (14) au-dessus de la grille de combustion (5) pour l'amenée d'air secondaire de combustion, installation dans laquelle est prévue au moins une conduite d'aspiration (23, 24) de gaz de combustion dans la chambre de combustion (14) au-dessus de la grille de combustion (5), caractérisée en ce que la conduite d'aspiration (24) est reliée avec le côté aspiration d'un ventilateur (25) et dont le côté refoulement est relié aux tuyères (21,22), débouchant dans la chambre de combustion (14), au-dessus de la grille de combustion (5) par l'intermédiaire d'une conduite (26) pour l'amenée d'air secondaire de combustion.
10. Installation de combustion pour la réalisation du procédé selon la revendication 8 ou 9, caractérisée en ce que l'ouverture d'aspiration (23) de la conduite d'aspiration (24) est prévue sur au moins une paroi latérale (18) de la chambre de combustion (14), au-dessus de la grille de combustion (5).
11. Installation de combustion pour la réalisation du procédé selon la revendication 8 ou 9, caractérisée en ce que l'ouverture d'aspiration (23) de la conduite d'aspiration (24) est prévue sur la face arrière (17) de la chambre de combustion (14) au-dessus de la grille de combustion (5).
EP91101711A 1991-02-07 1991-02-07 Procédé pour l'admission d'air de combustion et installation de chauffage Expired - Lifetime EP0498014B2 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DK91101711.9T DK0498014T3 (da) 1991-02-07 1991-02-07 Fremgangsmåde til forbrændingslufttilførsel, og fyringsanlæg
EP91101711A EP0498014B2 (fr) 1991-02-07 1991-02-07 Procédé pour l'admission d'air de combustion et installation de chauffage
ES91101711T ES2055466T5 (es) 1991-02-07 1991-02-07 Procedimiento para la alimentacion de aire de combustion e instalacion de hogar.
DE59101576T DE59101576D1 (de) 1991-02-07 1991-02-07 Verfahren zur Verbrennungsluftzuführung und Feuerungsanlage.
AT9191101711T ATE105396T1 (de) 1991-02-07 1991-02-07 Verfahren zur verbrennungsluftzufuehrung und feuerungsanlage.
US07/829,963 US5241916A (en) 1991-02-07 1992-02-03 Procedure for supplying combustion air and a furnace therefor
CA002060776A CA2060776C (fr) 1991-02-07 1992-02-06 Methode pour fournir de l'air comburant et fourneau
BR929200411A BR9200411A (pt) 1991-02-07 1992-02-06 Processo para a alimentacao de ar de combustao e fornalha
JP4022421A JP2575256B2 (ja) 1991-02-07 1992-02-07 燃焼空気導入方法および燃焼装置
TW081105748A TW201814B (fr) 1991-02-07 1992-07-21
JP7192774A JP2650879B2 (ja) 1991-02-07 1995-07-28 燃焼空気導入方法および燃焼装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91101711A EP0498014B2 (fr) 1991-02-07 1991-02-07 Procédé pour l'admission d'air de combustion et installation de chauffage

Publications (3)

Publication Number Publication Date
EP0498014A1 EP0498014A1 (fr) 1992-08-12
EP0498014B1 true EP0498014B1 (fr) 1994-05-04
EP0498014B2 EP0498014B2 (fr) 1996-10-30

Family

ID=8206382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101711A Expired - Lifetime EP0498014B2 (fr) 1991-02-07 1991-02-07 Procédé pour l'admission d'air de combustion et installation de chauffage

Country Status (10)

Country Link
US (1) US5241916A (fr)
EP (1) EP0498014B2 (fr)
JP (2) JP2575256B2 (fr)
AT (1) ATE105396T1 (fr)
BR (1) BR9200411A (fr)
CA (1) CA2060776C (fr)
DE (1) DE59101576D1 (fr)
DK (1) DK0498014T3 (fr)
ES (1) ES2055466T5 (fr)
TW (1) TW201814B (fr)

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Publication number Priority date Publication date Assignee Title
DE102017008123A1 (de) * 2017-08-30 2019-02-28 Martin GmbH für Umwelt- und Energietechnik Feuerungsanlage und Verfahren zum Betreiben einer Feuerungsanlage

Also Published As

Publication number Publication date
DK0498014T3 (da) 1994-09-12
ES2055466T3 (es) 1994-08-16
JP2650879B2 (ja) 1997-09-10
JPH08233233A (ja) 1996-09-10
EP0498014B2 (fr) 1996-10-30
JP2575256B2 (ja) 1997-01-22
CA2060776C (fr) 1995-10-03
EP0498014A1 (fr) 1992-08-12
ES2055466T5 (es) 1997-02-01
ATE105396T1 (de) 1994-05-15
DE59101576D1 (de) 1994-06-09
JPH0560313A (ja) 1993-03-09
CA2060776A1 (fr) 1992-08-08
TW201814B (fr) 1993-03-11
BR9200411A (pt) 1992-10-13
US5241916A (en) 1993-09-07

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