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EP0567004A1 - Plaque céramique de brûleur - Google Patents

Plaque céramique de brûleur Download PDF

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Publication number
EP0567004A1
EP0567004A1 EP93106195A EP93106195A EP0567004A1 EP 0567004 A1 EP0567004 A1 EP 0567004A1 EP 93106195 A EP93106195 A EP 93106195A EP 93106195 A EP93106195 A EP 93106195A EP 0567004 A1 EP0567004 A1 EP 0567004A1
Authority
EP
European Patent Office
Prior art keywords
passage openings
plate
polygon
openings
plate according
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
EP93106195A
Other languages
German (de)
English (en)
Other versions
EP0567004B1 (fr
Inventor
Peter Goebel
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.)
Nv Vaillant Sa
VAILLANT B.V.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Publication of EP0567004A1 publication Critical patent/EP0567004A1/fr
Application granted granted Critical
Publication of EP0567004B1 publication Critical patent/EP0567004B1/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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate

Definitions

  • the invention relates to a ceramic burner plate, which is primarily used for a 100% premixed forced draft burner, the requirements of which for the burner's modulation ability depend, in particular, on the design of the burner plate in its surface design and in the associated hole pattern.
  • the hole pattern and surface structure should ensure that the flame length remains relatively stable in the range of 30-120% Q NB given the different degrees of modulation of the burner.
  • the flame carpet that forms shows clearly differently arising flame tips due to the surface structure of the plate. This ensures that the plate itself can be operated in a large operating range without acoustic problems due to burner vibrations due to a mutual interference of the flames in the flame carpet.
  • the hole diameters are to be determined in accordance with the desired minimum and maximum load range of the burner, in particular the larger depression and the bundling of many small flames to form a single main flame, due to the special shape of the depression and that in the depression Passage openings specially arranged on the edge grant this special flame stabilization and only cause a possible glow of the plate in the edge region of these two craters belonging together. In this way, the temperature fluctuations of the burner plate are kept relatively low, and fluctuations in pressure loss with the same burner load during longer operating times of the burner are avoided.
  • the hole pattern and the surface structure ensure that there is increased recirculation in the individual main flames, the improved NO x values thus delivering approximately 60% lower than comparable plates with the same loads.
  • the necessary flame stability ensures a wide modulation range of the burner even with critical types of gas. This flame stability ensures that there is no excessive flame cooling and thus an increase in CO emissions with low burner loads. Around 50% lower values were achieved compared to comparable burner plates.
  • Such a plate was known for example from EP B 106 761.
  • the passage openings are arranged in a regular hexagon surrounding a central passage opening.
  • the aim of the invention is to avoid the known disadvantages of the conventional ceramic plates for the radiation burners and full premix burners, in particular also the tendency to develop noise in the modulation range of approximately 20-120%. Furthermore, the emissions, CO and NO x values should be significantly reduced.
  • the inner polygon is a regular pentagon and the outer polygon is a regular heptagon or nine-corner
  • two groups of passage openings arranged next to one another have a common passage opening forming a corner point of the outer polygons, wherein the outer polygons of the neighboring groups preferably have a different number of corners, the outer polygons of the neighboring groups preferably have a different number of corners.
  • the passage openings arranged in the form of the outer polygon have a larger diameter than the passage openings arranged in the form of the inner polygon.
  • the depressions in which the passage openings are arranged have two conical sections, of which the inner section in each case has a larger opening angle than the outer section.
  • the plate is profiled with wave troughs and wave crests running parallel to one another and the rows in which the groups of passage openings are arranged in the wave troughs which run obliquely with respect to the main axes of the plate, preferably at an angle of 15 to 30 ° are arranged, resulting in different flame heights with the same burner load and thus the known acoustic problems are avoided.
  • a ceramic plate 1 of a premix burner has groups 3, 31 of passage openings 4, 5 and 6 arranged on its surface 7 facing the flames in depressions 2.
  • the groups 3, 31 are arranged alternately next to one another in rows, the adjacent rows of groups 3, 31 being offset from one another.
  • each group 3, 31 has a central cylindrical passage opening 4 which is surrounded by smaller cylindrical passage openings 5 arranged in a regular pentagon. Furthermore, in each group 3, 31 there are also passage openings 6 arranged in a polygon surrounding the passage openings 5 arranged in a pentagon. In the case of groups 3, the outer passage openings 6 are arranged in a regular heptagon, whereas in groups 31 the outer passage openings 6 are arranged in a regular Neuneck are arranged. A passage opening 6 is common to both groups 3, 31.
  • the passage openings 5 arranged in a pentagon are arranged in such a way that the groups 3, 31 arranged next to one another result in a mirror-image arrangement of the passage openings 5.
  • the passage openings 5 have a smaller diameter than the passage openings 4 and 6.
  • FIG. 3 shows the extent of the passage openings 4, 5 and 6 from the top 7 to the opposite bottom 8, which faces a mixing chamber for a gas-air mixture.
  • the depressions 2 have two conical sections 9 and 10, in which the passage openings 5 and 6 are arranged.
  • Section 9, in which the passage openings 5 of each group 3, 31 are arranged, has a larger opening angle than section 10, in which the passage openings 6 arranged in the outer polygon are arranged.
  • the plate 1 is profiled with wave crests 12 and wave troughs 11 running parallel to one another, these sloping towards the main axes of the plate 1.
  • the angle which the wave crests 12 and wave troughs 11 form with the lateral edge of the plate 1 is expediently 15 ° to 30 °.
  • the groups 3, 31 of passage openings 4, 5 and 6 are arranged in the wave troughs 11, the height difference between the wave crests 12 and the wave troughs 11 being a maximum of 6 mm and the width of the wave trough 11 being a maximum of twice the width of the wave crest 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Seasonings (AREA)
  • Food-Manufacturing Devices (AREA)
EP93106195A 1992-04-21 1993-04-16 Plaque céramique de brûleur Expired - Lifetime EP0567004B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0080092A AT398469B (de) 1992-04-21 1992-04-21 Platte für strahlungsbrenner
AT800/92 1992-04-21

Publications (2)

Publication Number Publication Date
EP0567004A1 true EP0567004A1 (fr) 1993-10-27
EP0567004B1 EP0567004B1 (fr) 1998-03-04

Family

ID=3500015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106195A Expired - Lifetime EP0567004B1 (fr) 1992-04-21 1993-04-16 Plaque céramique de brûleur

Country Status (3)

Country Link
EP (1) EP0567004B1 (fr)
AT (2) AT398469B (fr)
DE (2) DE9305987U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9611236D0 (en) * 1996-05-30 1996-07-31 Bray Burners Ltd Improvements relating to fuel/air fully pre-mixed burners
NL1008233C2 (nl) * 1998-02-06 1999-08-09 Clysan D W Bv Gasbrander.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1751150A1 (de) * 1968-04-11 1970-08-13 Hogar Ind Strahlungsflaeche fuer Infrarotstrahlenerzeuger
DE2163498A1 (de) * 1971-12-21 1973-07-12 Schwank Gmbh Brennerplatte fuer infrarotstrahler

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1570721A (fr) * 1968-04-30 1969-06-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1751150A1 (de) * 1968-04-11 1970-08-13 Hogar Ind Strahlungsflaeche fuer Infrarotstrahlenerzeuger
DE2163498A1 (de) * 1971-12-21 1973-07-12 Schwank Gmbh Brennerplatte fuer infrarotstrahler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 170 (M-817)21. April 1989 & JP-A-01 003 407 ( RINNAI ) 9. Januar 1989 *

Also Published As

Publication number Publication date
ATA80092A (de) 1994-04-15
EP0567004B1 (fr) 1998-03-04
ATE163747T1 (de) 1998-03-15
AT398469B (de) 1994-12-27
DE9305987U1 (de) 1993-07-29
DE59308192D1 (de) 1998-04-09

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