EP0496094B1 - Düse zum Zuführen von Sekundärluft - Google Patents
Düse zum Zuführen von Sekundärluft Download PDFInfo
- Publication number
- EP0496094B1 EP0496094B1 EP91122012A EP91122012A EP0496094B1 EP 0496094 B1 EP0496094 B1 EP 0496094B1 EP 91122012 A EP91122012 A EP 91122012A EP 91122012 A EP91122012 A EP 91122012A EP 0496094 B1 EP0496094 B1 EP 0496094B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- outer casing
- nozzle
- air
- casing
- 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
Links
Images
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 nozzle for supplying secondary air into a firing system with a mechanical firing grate through which primary air can be introduced and a firing chamber formed thereover and delimited by boundary walls, in which secondary air is arranged by means of nozzles which are arranged at least in the front and rear boundary walls can be blown in, the nozzle having an inner jacket and an outer jacket held concentrically therewith and the inner jacket being connected to a flange which has a diameter exceeding the outer jacket and for deflecting the air flowing between the inner and outer jacket perpendicular to that exiting from the inner jacket Air serves.
- a ring with star-shaped webs is provided in the outer jacket for holding the inner jacket, the front edges of which, seen in the flow direction, are flush with the front edge of the inner jacket.
- This not only requires additional design effort, but the radially arranged webs also impair the air flow into the outer annular duct and thus make it difficult to calculate the air quantities flowing in both air ducts exactly.
- the annular channel on the outer circumference of the inner jacket has a substantially constant thickness over its entire length and is deflected in a gentle arc by the flange connected to the inner jacket in a direction perpendicular to the outflow direction of the air flowing in the inner jacket.
- the object of the invention is to provide a nozzle for supplying secondary air to a firing system, with the aid of which caking on the combustion chamber wall in the region of the nozzle is effectively prevented, with an exact, predictable division of the air streams into a central core jet and an outer ring jet being ensured should.
- the outer jacket is conically tapered over the entire length in the direction of flow of the air, that the inner jacket penetrates the flange designed as a baffle plate and the opposite end of the inner jacket located inside the outer jacket as Cutting edge is formed with an outwardly widening inner diameter at a constant outer diameter, and that the outer jacket is attached to the end face of the flange and at least a peripheral region is formed as an end slot nozzle between the outer jacket and the flange.
- the conical tapering of the outer jacket greatly accelerates the flow between the two jackets in the direction of the outlet end, and by fastening the outer jacket to the flange at the front while leaving the outlet slots, the flange acts as a baffle plate, resulting in strong turbulence in the emerging outer jet leads to an effective prevention of caking on the combustion chamber wall even with smaller amounts of air.
- the inner end of the inner jacket is designed as a cutting edge with an inner diameter that widens outwards, an exact turbulence-free division into a central core jet and an outer ring jet is achieved, which is of great importance for the calculation of the emerging air quantities.
- This turbulence-free inner core jet is not impaired by the flange either, because the inner jacket penetrates this flange, that is, it projects beyond it, so that the flange cannot impair the core jet.
- the inner jacket is shorter than the outer jacket and has a length that is between three times and six times its 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 around the unburned parts which go up into rise the firebox to subject it to further combustion.
- the secondary air Nozzles 11 of the rear boundary wall are designed so that this deposition 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, for. B. is firmly connected by welding.
- the outer jacket 12 is connected on the end face to the flange 14 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 front side of the outer jacket 12, as a result of which slot-shaped nozzles 15 are located between the two spacers between the front side 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 located at the inside of 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 the Boundary wall 7 emerges while the other part of the air between 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 there flows out 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. 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 shell 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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Air Supply (AREA)
- Exhaust Gas After Treatment (AREA)
- Solid-Fuel Combustion (AREA)
- Gasification And Melting Of Waste (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Catching Or Destruction (AREA)
- Jet Pumps And Other Pumps (AREA)
- Nozzles (AREA)
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 EP0496094A2 (de) | 1992-07-29 |
EP0496094A3 EP0496094A3 (en) | 1992-12-23 |
EP0496094B1 true EP0496094B1 (de) | 1996-02-21 |
Family
ID=6423629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91122012A Expired - Lifetime EP0496094B1 (de) | 1991-01-24 | 1991-12-20 | Düse zum Zuführen von Sekundärluft |
Country Status (10)
Country | Link |
---|---|
US (1) | US5174226A (es) |
EP (1) | EP0496094B1 (es) |
JP (1) | JPH0648086B2 (es) |
AT (1) | ATE134433T1 (es) |
BR (1) | BR9200194A (es) |
CA (1) | CA2058865C (es) |
DE (2) | DE4102072A1 (es) |
DK (1) | DK0496094T3 (es) |
ES (1) | ES2082916T3 (es) |
TW (1) | TW200558B (es) |
Families Citing this family (6)
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 |
Family Cites Families (7)
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 |
US3955512A (en) * | 1973-11-30 | 1976-05-11 | Josef Martin Feuerungsbau Gmbh | Refuse incinerator |
DE3038875C2 (de) * | 1980-10-15 | 1990-05-31 | Vereinigte Kesselwerke AG, 4000 Düsseldorf | Müllverbrennungsanlage |
JPS5837415A (ja) * | 1981-08-28 | 1983-03-04 | 株式会社 タクマ | 低NOx用ごみ焼却炉 |
CH665468A5 (de) * | 1983-05-20 | 1988-05-13 | Theodor Koch | Verfahren zur sekundaerluftzufuehrung, sekundaerlufteinlass zur ausfuehrung des verfahrens sowie anwendung des verfahrens. |
US4917026A (en) * | 1989-03-28 | 1990-04-17 | Macmillan Bloedal Limited | Debris burner |
FR2645625B1 (fr) * | 1989-04-07 | 1994-05-27 | Otv D | Procede pour le traitement de dechets menagers et chaudiere pour la mise en oeuvre de ce procede |
-
1991
- 1991-01-24 DE DE4102072A patent/DE4102072A1/de active Granted
- 1991-12-20 DE DE59107430T patent/DE59107430D1/de not_active Expired - Fee Related
- 1991-12-20 EP EP91122012A patent/EP0496094B1/de not_active Expired - Lifetime
- 1991-12-20 DK DK91122012.7T patent/DK0496094T3/da active
- 1991-12-20 AT AT91122012T patent/ATE134433T1/de not_active IP Right Cessation
- 1991-12-20 ES ES91122012T patent/ES2082916T3/es not_active Expired - Lifetime
-
1992
- 1992-01-07 CA CA002058865A patent/CA2058865C/en not_active Expired - Fee Related
- 1992-01-07 JP JP4000671A patent/JPH0648086B2/ja not_active Expired - Fee Related
- 1992-01-15 US US07/821,495 patent/US5174226A/en not_active Expired - Lifetime
- 1992-01-23 BR BR929200194A patent/BR9200194A/pt not_active IP Right Cessation
- 1992-07-21 TW TW081105740A patent/TW200558B/zh active
Also Published As
Publication number | Publication date |
---|---|
DE59107430D1 (de) | 1996-03-28 |
US5174226A (en) | 1992-12-29 |
JPH055517A (ja) | 1993-01-14 |
DE4102072C2 (es) | 1993-02-04 |
EP0496094A3 (en) | 1992-12-23 |
TW200558B (es) | 1993-02-21 |
BR9200194A (pt) | 1992-10-06 |
ATE134433T1 (de) | 1996-03-15 |
ES2082916T3 (es) | 1996-04-01 |
DE4102072A1 (de) | 1992-07-30 |
CA2058865C (en) | 1995-09-26 |
EP0496094A2 (de) | 1992-07-29 |
DK0496094T3 (da) | 1996-07-08 |
JPH0648086B2 (ja) | 1994-06-22 |
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