EP0496094A2 - Ajutage pour amener l'air secondaire - Google Patents

Ajutage pour amener l'air secondaire Download PDF

Info

Publication number
EP0496094A2
EP0496094A2 EP91122012A EP91122012A EP0496094A2 EP 0496094 A2 EP0496094 A2 EP 0496094A2 EP 91122012 A EP91122012 A EP 91122012A EP 91122012 A EP91122012 A EP 91122012A EP 0496094 A2 EP0496094 A2 EP 0496094A2
Authority
EP
European Patent Office
Prior art keywords
flange
secondary air
jacket
nozzle
nozzles
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
Application number
EP91122012A
Other languages
German (de)
English (en)
Other versions
EP0496094B1 (fr
EP0496094A3 (en
Inventor
Walter Josef Dipl.-Ing. Martin
Johannes Josef Edmund 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
Application filed by Martin GmbH fuer Umwelt und Energietechnik filed Critical Martin GmbH fuer Umwelt und Energietechnik
Publication of EP0496094A2 publication Critical patent/EP0496094A2/fr
Publication of EP0496094A3 publication Critical patent/EP0496094A3/de
Application granted granted Critical
Publication of EP0496094B1 publication Critical patent/EP0496094B1/fr
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
    • 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 supplying secondary air into a firing system with a mechanical firing grate through which primary air is introduced and a firing chamber formed thereover and delimited by boundary walls, in which by means of nozzles which are arranged at least in the front and rear boundary walls. Secondary air is blown in.
  • the invention also relates to a nozzle for performing the method.
  • the object of the invention is to avoid the caking occurring on a boundary wall or a plurality of boundary walls of the combustion chamber.
  • the secondary air By dividing the secondary air into a portion directed into the combustion chamber and a portion directed parallel to the boundary wall, the latter forms a veil on the boundary wall which is able to trap some of the fuel particles so that they cannot reach the boundary wall . Insofar as this is not possible because the particles have too great a kinetic energy, this fuel particles are at least cooled to such an extent that they no longer adhere to the boundary wall. This simple measure has thus solved a serious problem which, as already explained, has had serious consequences so far.
  • a nozzle for carrying out the method is characterized in that it has an outer jacket which tapers conically in the direction of flow, a cylindrical inner jacket and a flange which holds the two jackets concentrically to one another and firmly connects one another, which the inner jacket penetrates and one which the outer jacket at its Flange facing end exceeding Has diameter and that the outer jacket is attached to the end face of the flange and at least one peripheral region is formed as an end slot nozzle between the outer jacket and the flange.
  • the inner jacket is shorter than the outer jacket and in a further embodiment of the invention has a length that is between 3 times and 6 times its diameter.
  • the end of the inner jacket located in the interior of the outer jacket is designed as a cutting edge with an inside diameter widening outwards with a constant outside diameter.
  • a section of a firing system is shown in schematic form, which has a fire grate 1 and a feed table 2 with feed pistons 3, which push the fuel fed through a feed chute 4 onto the firing grate.
  • the upwardly extending combustion chamber 5 is formed in its first part, which is bounded by a front boundary wall 6, a rear boundary wall 7 and side walls 8.
  • the combustion material lying on the grate 1 is supplied with primary combustion air from below through the grate.
  • secondary air nozzles 10 and 11 are preferably provided in the area of the front boundary wall 6 and in the area of the rear boundary wall 7, which blow additional combustion air into the combustion chamber in order to keep the unburned parts upwards rise the firebox to subject it to further combustion.
  • the secondary air Nozzles 11 of the rear boundary wall are designed so that this deposit is prevented by a special air duct.
  • the secondary air nozzle is constructed from an outer jacket 12 and an inner jacket 13 which passes through a flange 14 and with this, z. B. is firmly connected by welding.
  • the outer jacket 12 is connected on the end face to the flange 14, namely by interposing two arc-shaped spacers 16 and 17, which are firmly connected on the one hand to the flange 14 and on the other hand to the end face of the outer case 12, as a result of which slot-shaped nozzles 15 between the end members of the outer casing 12 and the flange 14 remain, from which air can escape, which is supplied by means of a feed line (not shown) which can be connected to the end 19 of the outer casing 12.
  • This air is divided into two parts by the inner jacket 13, which has a cutting edge 20 at its end located inside the outer jacket 12, one part of the secondary air flowing inside the inner jacket 13 and from the free end 21 into the combustion chamber perpendicular to Boundary wall 7 emerges while the other part of the air between the
  • the outer surface of the inner shell 13 and the inner surface of the outer shell 12 flows to the slit-shaped nozzles 15 between the end face of the outer shell 12 and the flange 14 and flows out there essentially parallel to the rear boundary wall 7 from the secondary air nozzle, designated as 11, and acts as a veil parallel to it Boundary wall spreads out.
  • Baking of combustible particles on the boundary wall 7 of the combustion chamber is avoided by this air emerging essentially parallel to the boundary wall 7 between the end face of the outer shell 12 and the flange 14, which projects significantly beyond the outer diameter of the outer flange at this point.
  • the secondary air nozzle according to FIGS. 4 and 5 essentially corresponds to that according to FIGS. 2 and 3, so that matching parts are provided with the same reference numbers. The only difference is that four spacers 16, 16a, 17 and 17a are provided between the flange 14 and the outer jacket 12, so that four opposing nozzles 15 are formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Solid-Fuel Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Nozzles (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Catching Or Destruction (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP91122012A 1991-01-24 1991-12-20 Ajutage pour amener l'air secondaire Expired - Lifetime EP0496094B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4102072A DE4102072A1 (de) 1991-01-24 1991-01-24 Verfahren und duese zum zufuehren von sekundaerluft
DE4102072 1991-01-24

Publications (3)

Publication Number Publication Date
EP0496094A2 true EP0496094A2 (fr) 1992-07-29
EP0496094A3 EP0496094A3 (en) 1992-12-23
EP0496094B1 EP0496094B1 (fr) 1996-02-21

Family

ID=6423629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91122012A Expired - Lifetime EP0496094B1 (fr) 1991-01-24 1991-12-20 Ajutage pour amener l'air secondaire

Country Status (10)

Country Link
US (1) US5174226A (fr)
EP (1) EP0496094B1 (fr)
JP (1) JPH0648086B2 (fr)
AT (1) ATE134433T1 (fr)
BR (1) BR9200194A (fr)
CA (1) CA2058865C (fr)
DE (2) DE4102072A1 (fr)
DK (1) DK0496094T3 (fr)
ES (1) ES2082916T3 (fr)
TW (1) TW200558B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4232488C1 (de) * 1992-09-28 1993-12-23 Martin Umwelt & Energietech Zweitluftdüse für Feuerungen
US5564632A (en) * 1994-12-27 1996-10-15 Combustion Engineering, Inc. Secondary air nozzle and starting burner furnace apparatus
DE19843991C2 (de) * 1998-09-25 2002-08-14 Juenger & Graeter Gmbh Feuerfe Zünddeckennase
US20100263654A1 (en) * 2006-10-06 2010-10-21 Cusack William E Outdoor Cooker
US8864491B1 (en) * 2007-12-12 2014-10-21 Precision Combustion, Inc. Direct injection method and apparatus for low NOx combustion of high hydrogen fuels
DE102013017427A1 (de) 2013-10-19 2015-04-23 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Druckrückgewinnungseinrichtung und Kraftfahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956527A (en) * 1955-07-07 1960-10-18 Babcock & Wilcox Co Combustion apparatus for ash containing fuel
DE3038875A1 (de) * 1980-10-15 1982-06-03 Vereinigte Kesselwerke AG, 4000 Düsseldorf Muellverbrennungsanlage
EP0126920A1 (fr) * 1983-05-20 1984-12-05 KOCH, Theodor Procédé d'injection d'air secondaire; entrée d'air secondaire pour la réalisation du procédé et application du procédé
FR2645625A1 (fr) * 1989-04-07 1990-10-12 Otv D Procede pour le traitement de dechets menagers et chaudiere pour la mise en oeuvre de ce procede

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955512A (en) * 1973-11-30 1976-05-11 Josef Martin Feuerungsbau Gmbh Refuse incinerator
JPS5837415A (ja) * 1981-08-28 1983-03-04 株式会社　タクマ 低ＮＯｘ用ごみ焼却炉
US4917026A (en) * 1989-03-28 1990-04-17 Macmillan Bloedal Limited Debris burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956527A (en) * 1955-07-07 1960-10-18 Babcock & Wilcox Co Combustion apparatus for ash containing fuel
DE3038875A1 (de) * 1980-10-15 1982-06-03 Vereinigte Kesselwerke AG, 4000 Düsseldorf Muellverbrennungsanlage
EP0126920A1 (fr) * 1983-05-20 1984-12-05 KOCH, Theodor Procédé d'injection d'air secondaire; entrée d'air secondaire pour la réalisation du procédé et application du procédé
FR2645625A1 (fr) * 1989-04-07 1990-10-12 Otv D Procede pour le traitement de dechets menagers et chaudiere pour la mise en oeuvre de ce procede

Also Published As

Publication number Publication date
DK0496094T3 (da) 1996-07-08
US5174226A (en) 1992-12-29
DE4102072A1 (de) 1992-07-30
DE59107430D1 (de) 1996-03-28
TW200558B (fr) 1993-02-21
DE4102072C2 (fr) 1993-02-04
EP0496094B1 (fr) 1996-02-21
EP0496094A3 (en) 1992-12-23
JPH0648086B2 (ja) 1994-06-22
JPH055517A (ja) 1993-01-14
BR9200194A (pt) 1992-10-06
ES2082916T3 (es) 1996-04-01
ATE134433T1 (de) 1996-03-15
CA2058865C (fr) 1995-09-26

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