EP1207345A2 - Regeleinrichtung zum Einstellen eines Brennstoff-Verbrennungsluft-Gemisches für einen mit Öl oder Gas betriebenen Brenner - Google Patents
Regeleinrichtung zum Einstellen eines Brennstoff-Verbrennungsluft-Gemisches für einen mit Öl oder Gas betriebenen Brenner Download PDFInfo
- Publication number
- EP1207345A2 EP1207345A2 EP01126118A EP01126118A EP1207345A2 EP 1207345 A2 EP1207345 A2 EP 1207345A2 EP 01126118 A EP01126118 A EP 01126118A EP 01126118 A EP01126118 A EP 01126118A EP 1207345 A2 EP1207345 A2 EP 1207345A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- control device
- signal
- evaluation circuit
- flame
- combustion air
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 8
- 230000005855 radiation Effects 0.000 claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 230000010349 pulsation Effects 0.000 claims abstract description 3
- 238000002485 combustion reaction Methods 0.000 claims description 20
- 238000011156 evaluation Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 8
- 230000035945 sensitivity Effects 0.000 claims description 5
- 230000003595 spectral effect Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000004071 soot Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
- F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
Definitions
- the invention relates to a control device for setting a fuel-combustion air mixture for a burner operated with oil or gas the preamble of claim 1.
- From DE 198 09 653 C1 is a flame monitor for bluish burning Flames of an oil or gas burner known to the flame radiation sensing photo sensor, one that rises sharply from ultraviolet to infrared Has sensitivity, and includes a downstream evaluation circuit, the the fuel supply switches off when the radiation is in the range from 200 to 500 nm fails or the increase in the detected radiation intensity above 500 nm Migration from the blue area shows.
- the signal of the Two-channel photo sensor on the one hand, for ultraviolet radiation up to 500 nm and on the other hand, regarding visible and infrared radiation.
- the object of the invention is a control device according to the preamble of claim 1, which allows changes in flame radiation interpret correctly and regulate accordingly.
- Fig. 1 shows a diagram relating to different sizes, plotted compared to the lambda value.
- FIG. 2 schematically shows a circuit diagram for a control device.
- Fig. 3 shows diagrammatically the formation of measured values for the Flickering frequency of the flame radiation.
- a flame from an oil or gas burner burns optimally when a little stoichiometric excess of air is present, i.e. the lambda value is slightly larger than one. If the lambda value continues to increase, the Intensity of the flame radiation too, which also happens when the lambda value falls below one. With a lambda value greater than one shift at Increasing the proportion of combustion air increases the optical frequencies of the Flame radiation to larger values, with a lambda value less than one the optical shifts when the proportion of combustion air is reduced Frequencies of flame radiation at smaller values. In the latter case it increases however, the soot development then also strongly increases (cf. diagram of FIG.
- the photo sensor When using a photo sensor that detects the flame radiation, the has a sensitivity that rises sharply from ultraviolet to infrared, and a downstream evaluation circuit that generates a signal that the over a predetermined time integrated signal of the photosensor with respect to the radiation in the range of longer wavelengths, approximately> 500 nm, one can do that Apply generated signal to Lambda. You then get one burner-specific curve B according to the diagram of FIG. 1.
- curve B has a lambda value of about 1 has a minimum and from there to both higher and lower ones Lambda values increases. This leads to the fact that a distinction criterion for The two branches of the curve must be provided if you make mistakes in regulating want to avoid the fuel-combustion air mixture. A soot measurement is however, this is far too complex.
- the flicker frequency of the Use flame radiation for this purpose as it is ⁇ 1 in the range for Lambda lower frequencies and for lambda> 1 in the range of higher frequencies.
- the Evaluation circuit the signal of the photo sensor with respect to flicker frequency and / or Analyzes the amplitude of the detected flame radiation and determines the Emigration of the flame radiation at a flickering frequency below one predetermined value, a signal for increasing the combustion air content of the Fuel-combustion air mixture and when exceeding one predetermined second value a signal for lowering the Combustion air portion of the fuel-combustion air mixture generated.
- the flickering frequency of the flame from the signal of the Photo sensor determined and then when the emigration of the flame radiation is determined when the value falls below a predetermined first value Combustion air percentage and thus the lambda value increased, and when exceeded a predetermined second value, the combustion air content is reduced.
- the the first and second predetermined values may be the same or an interval define in which no change in the combustion air proportion is made. In this way, a lambda value can be slightly larger than one for an optimal one Stop combustion and regulate it to this value carry out without an excessive construction effort would be necessary.
- the diagram of FIG. 1 also contains a curve C, the "zero crossings", referred to here as pulsation (Hz) of the signal amplified by an amplifier 1 of the photodetector 2 which detects the flame radiation is plotted opposite Lambda affects. These zero crossings per unit of time essentially correspond the flicker frequency of the flame radiation. These zero crossings are from the Evaluation circuit generated by the DC component of the signal of the Cut off the photo sensor and lay the zero line for the AC component the noise component of the signal is suppressed, i.e. that the dominant Amplitudes remain. The resulting AC signal becomes such amplified, amplifier 3 that as a result of cutting off the upper and lower Sections result in essentially rectangular pulses with varying pulse widths.
- Hz pulsation
- a comparator 4 is expediently used either downstream counter, a shift register and evaluation or one Microprocessor 5 is used, which performs the functions of these components.
- Low frequencies of approximately ⁇ 30 Hz can be made in advance by means of a high-pass filter 6 be cut off so that they are not included in the evaluation.
- the limit for a shutdown is relatively small and periods can occur within the predetermined time in which there is no zero crossing is determined
- an optical filter in front of the photosensor use that is essentially absorbing in a wavelength range, which corresponds to the radiation from glowing furnace walls (greater than about 900 nm), thus a flickering that can be generated in the absence of flame by the fact that Air is swirled by a fan in the oven, not with the actual one Flickering of a flame is mistaken.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
Description
Claims (11)
- Regeleinrichtung zum Einstellen eines Brennstoff-Verbrennungsluft-Gemisches für einen mit Öl oder Gas betriebenen Brenner, mit einem die optische Flammenstrahlung und deren Pulsationen erfassenden Fotosensor (1) und einer diesem nachgeschalteten Auswerteschaltung, die feststellt, ob die Flammenstrahlung im blauen Bereich ausfällt oder zu größeren Wellenlängen hin auswandert, dadurch gekennzeichnet, daß die Auswerteschaltung das Signal des Fotosensors bezüglich Flackerfrequenz und/oder Amplitude der erfaßten Flammenstrahlung auswertet und beim Feststellen des Auswanderns der Flammenstrahlung bei einer Flackerfrequenz unterhalb eines vorbestimmten Wertes ein Signal zum Erhöhen des Verbrennungsluftanteils des Brennstoff-Verbrennungsluft-Gemisches und beim Überschreiten des vorbestimmten zweiten Wertes ein Signal zum Erniedrigen des Verbrennungsluftanteils des Brennstoff-Verbrennungsluft-Gemisches erzeugt.
- Regeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Fotosensor (1) eine von Ultraviolett zu Infrarot stark ansteigende Empfindlichkeit aufweist.
- Regeleinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Auswerteschaltung einen Kanal zur Auswertung von Signalanteilen niedriger und/oder höherer optischer Frequenz aufweist.
- Regeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Auswerteschaltung ein für die spektrale Verteilung der Flammenstrahlung repräsentatives Signal erzeugt und bezüglich des Auswanderns auswertet.
- Regeleinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Auswerteschaltung die Zahl der Nulldurchgänge des bearbeiteten Signals des Fotosensors (1) innerhalb einer vorbestimmten Zeiteinheit bestimmt wobei das Signal des Fotosensors vom Gleichspannungsanteil und Rauschen befreit durch entsprechendes Verstärken zu Rechteckimpulsen verarbeitet ist.
- Regeleinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Zahl der Nulldurchgänge mit einem vorbestimmten Grenzwert vergleichbar sind, bei dessen Unterschreiten ein Abschaltsignal für die Brennstoffzufuhr erzeugt wird.
- Regeleinrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die auf- oder absteigenden Flanken des Signals von der Auswerteschaltung zählbar sind.
- Regeleinrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Auswerteschaltung einen Komparator mit nachgeschaltetem Zähler aufweist.
- Regeleinrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß die vorbestimmte Zeiteinheit von der Auswerteschaltung in eine Vielzahl von Abschnitten unterteilt ist, wobei die Zahl der Nulldurchgänge am Ende jedes Abschnitts bestimmt wird.
- Regeleinrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Abschnitte einen Bruchteil der geforderten Brennerabschaltzeit beim Feststellen fehlender Flamme bilden.
- Regeleinrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß dem Fotosensor ein optisches Filter vorgeschaltet ist, das im wesentlichen Strahlung entsprechend derjenigen von glühenden Ofenwänden absorbiert.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10055832 | 2000-11-11 | ||
| DE10055832A DE10055832C2 (de) | 2000-11-11 | 2000-11-11 | Regeleinrichtung zum Einstellen eines Brennstoff-Verbrennungsluft-Gemisches für einen mit Öl oder Gas betriebenen Brenner |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1207345A2 true EP1207345A2 (de) | 2002-05-22 |
| EP1207345A3 EP1207345A3 (de) | 2004-04-28 |
| EP1207345B1 EP1207345B1 (de) | 2006-08-02 |
Family
ID=7662878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01126118A Expired - Lifetime EP1207345B1 (de) | 2000-11-11 | 2001-11-03 | Regeleinrichtung zum Einstellen eines Brennstoff-Verbrennungsluft-Gemisches für einen mit Öl oder Gas betriebenen Brenner |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1207345B1 (de) |
| AT (1) | ATE335170T1 (de) |
| DE (2) | DE10055832C2 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1956292A4 (de) * | 2005-11-08 | 2010-12-15 | Kobelco Eco Solutions Co Ltd | Sekundärverbrennungsverfahren und -einheit in einer verbrennungsanlage |
| US12449127B2 (en) | 2021-11-24 | 2025-10-21 | Autoflame Engineering Limited | Burner control system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005008893B4 (de) * | 2005-02-26 | 2007-04-19 | Forschungszentrum Karlsruhe Gmbh | Verfahren zur Erhöhung des Gebindedurchsatzes in Drehrohranlagen |
| DE102010044430A1 (de) | 2010-09-04 | 2012-03-08 | G I W E P Gesellschaft für industrielle Wärme, Energie- und Prozeßtechnik m.b.H | Verfahren zur Überwachung von gasbeheizten Ofenanlagen |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19809653C1 (de) | 1998-03-06 | 1999-09-16 | Giersch Gmbh | Flammenwächter |
| DE19746786C2 (de) | 1997-10-23 | 2000-10-26 | Giersch Gmbh Oel Und Gasbrenne | Optischer Flammenwächter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5037291A (en) * | 1990-07-25 | 1991-08-06 | Carrier Corporation | Method and apparatus for optimizing fuel-to-air ratio in the combustible gas supply of a radiant burner |
| DE19650972C2 (de) * | 1996-12-09 | 2001-02-01 | Elbau Elektronik Bauelemente G | Verfahren und Anordnung zur Überwachung und Regelung von Verbrennungsprozessen |
-
2000
- 2000-11-11 DE DE10055832A patent/DE10055832C2/de not_active Expired - Lifetime
-
2001
- 2001-11-03 AT AT01126118T patent/ATE335170T1/de not_active IP Right Cessation
- 2001-11-03 EP EP01126118A patent/EP1207345B1/de not_active Expired - Lifetime
- 2001-11-03 DE DE50110598T patent/DE50110598D1/de not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19746786C2 (de) | 1997-10-23 | 2000-10-26 | Giersch Gmbh Oel Und Gasbrenne | Optischer Flammenwächter |
| DE19809653C1 (de) | 1998-03-06 | 1999-09-16 | Giersch Gmbh | Flammenwächter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1956292A4 (de) * | 2005-11-08 | 2010-12-15 | Kobelco Eco Solutions Co Ltd | Sekundärverbrennungsverfahren und -einheit in einer verbrennungsanlage |
| US12449127B2 (en) | 2021-11-24 | 2025-10-21 | Autoflame Engineering Limited | Burner control system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10055832C2 (de) | 2002-10-31 |
| ATE335170T1 (de) | 2006-08-15 |
| DE10055832A1 (de) | 2002-05-29 |
| EP1207345A3 (de) | 2004-04-28 |
| DE50110598D1 (de) | 2006-09-14 |
| EP1207345B1 (de) | 2006-08-02 |
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