EP2045521A2 - Brûleur avec une chambre d'évaporation - Google Patents

Brûleur avec une chambre d'évaporation Download PDF

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Publication number
EP2045521A2
EP2045521A2 EP08165000A EP08165000A EP2045521A2 EP 2045521 A2 EP2045521 A2 EP 2045521A2 EP 08165000 A EP08165000 A EP 08165000A EP 08165000 A EP08165000 A EP 08165000A EP 2045521 A2 EP2045521 A2 EP 2045521A2
Authority
EP
European Patent Office
Prior art keywords
evaporator chamber
side wall
burner
chamber
evaporator
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
EP08165000A
Other languages
German (de)
English (en)
Other versions
EP2045521A3 (fr
EP2045521B1 (fr
Inventor
Josef Wueest
Claude Minder
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.)
GLUTZ AG
Original Assignee
Toby AG
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 Toby AG filed Critical Toby AG
Publication of EP2045521A2 publication Critical patent/EP2045521A2/fr
Publication of EP2045521A3 publication Critical patent/EP2045521A3/fr
Application granted granted Critical
Publication of EP2045521B1 publication Critical patent/EP2045521B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/44—Preheating devices; Vaporising devices
    • F23D11/441—Vaporising devices incorporated with burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/44—Preheating devices; Vaporising devices
    • F23D11/441—Vaporising devices incorporated with burners
    • F23D11/443—Vaporising devices incorporated with burners heated by the main burner flame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/44—Preheating devices; Vaporising devices
    • F23D11/441—Vaporising devices incorporated with burners
    • F23D11/448—Vaporising devices incorporated with burners heated by electrical means

Definitions

  • the invention relates to a burner with an evaporator chamber referred to in the preamble of claim 1 Art.
  • Such an evaporator burner is designed for the combustion of liquid fuels such as commercial heating oil of various qualities or kerosene and is particularly suitable for heating systems of residential buildings, but also of non-residential buildings, where a rather low heating power in the range of a few kilowatts is sufficient.
  • the heat generated by the burner when burning the fuel for example, heats water in a boiler.
  • the liquid fuel is vaporized under heat, mixed with air and then burned.
  • An evaporator burner referred to in the preamble of claim 1 is known from the WO 00/12935 known.
  • the evaporator burner is located below the boiler. This burner has an evaporator chamber whose interior is delimited by a bottom and a cylindrical wall.
  • the evaporator chamber is electrically preheated at the start of the burner. As soon as the flame burns, the evaporator chamber is then heated by the hot combustion gases flowing past the evaporator chamber, which is achieved by means of a deflecting collar. Once the evaporator chamber has reached a predetermined temperature, which is monitored by means of a temperature sensor, the electric heater can be turned off.
  • Within the evaporator chamber is a rotating mixing wheel which swirls the supplied air and mixes it with the fuel vaporized on the wall of the evaporator chamber.
  • WO 2004/109183 is another evaporator burner with a same evaporator chamber known.
  • This evaporator burner is designed as a tumble burner and is mounted on top of the boiler. The flame burns below the evaporator chamber. The rising hot combustion gases heat the evaporator chamber directly.
  • evaporator burners are designed as modulating burners, i. Their heating power can be steplessly controlled in a predetermined work area. The working range is typically about 5 to 15 kW. However, there are also evaporator burners with a heating power of 3-9 kW or 10-30 kW.
  • burners can on the wall of the evaporator chamber and the mixing wheel over time deposits, in particular a layer of coke, form, which stems from the fact that fuel components with a higher boiling point remain on the wall and not evaporate or on the mixing wheel condense.
  • the invention has for its object to prevent the formation of such a coke layer.
  • the Fig. 1 shows a vertical section through the necessary for understanding the invention parts of a designed as a tumble burner evaporator burner.
  • the evaporator burner comprises an evaporator chamber 1, a blower 2, an electric motor for driving the blower 2, an atomizer cup 3, a mixing wheel 4 and a flame holder 5.
  • the flame burns on the outer wall of the flame holder 5.
  • the blower 2 comprises two rotors 7 and 8, which are mounted on a drive shaft 6 driven by the motor.
  • the rotors 7, 8 convey combustion air into the evaporator chamber 1.
  • the flame holder 5 contains a lid and rests on the evaporator chamber 1.
  • the evaporator chamber 1 is a chamber open to the flame holder 5 with a bottom 12 and a side wall 13.
  • the space enclosed by the bottom 12 and the side wall 13 of the evaporator chamber 1 space forms a mixing and evaporator zone.
  • an electric heater 14 is integrated in the wall of the evaporator chamber 1.
  • the atomizer cup 3 and the mixing wheel 4 are also mounted on the drive shaft 6 in this embodiment, ie the atomizer cup 3, the mixing wheel 4 and the rotors 7, 8 of the fan 2 rotate together at the same speed.
  • the atomizer cup 3 and the mixing wheel 4 could also be driven separately.
  • a fuel pump 15 delivers liquid fuel through a fuel line 16, which projects into the atomizer cup 3. The conveyed fuel flows or drips on the inner wall of the atomizer cup 3.
  • the fuel flows under the action of centrifugal force against the outer edge of the atomizer cup 3, is thrown off the edge and impinges on the inner wall of the evaporator chamber 1. Simultaneously is conveyed by the rotors 7, 8 of the blower 2 combustion air. A certain proportion of the combustion air flows outside the atomizer cup 3 directly into the evaporator chamber 1, another portion of the combustion air passes through openings in the bottom of the atomizer cup 3 into the interior of the atomizer cup 3 and the mixing wheel 4.
  • the rotary mixing wheel 4 serves to supply To redirect combustion air into the evaporator chamber 1, to swirl and with the vaporized To mix fuel oil vapor.
  • Such an evaporator burner can be designed as a tumble burner as shown, but it can also be designed for any other installation position, for example, a horizontal mounting position. It is suitable for use with condensing boilers as well as boilers of other types.
  • the atomizer cup 3 is advantageously designed as a wave-shaped surface.
  • the fuel supplied via the fuel line 16 flows or drips into a wave trough 9, migrates outwards due to the centrifugal force to a shaft maximum 10 and to a lower edge 10 than the shaft maximum 11.
  • the inner wall of the evaporator chamber 1 is bounded by a bottom 12 and a side wall 13 adjacent to the bottom 12.
  • the side wall 13 terminates at a projection 18 on which the flame holder 5 is seated.
  • the bottom 12 is a flat surface
  • the side wall 13 is formed according to the invention in this embodiment as a curved surface.
  • Seen from the bottom 12, the side wall 13 is a convex surface that extends to the projection 18. This results in a stepless transition from the bottom 12 to the side wall 13 and further to the projection 18, i. the transition from the bottom 12 to the side wall 13 is rounded.
  • the evaporator chamber 1 thus contains neither corners nor edges.
  • the side wall 13 is advantageously a part of the outer surface of a torus, which is a circular arc 17 in cross-section, as shown in the Fig. 1 is shown.
  • the radius of curvature of the circular arc 17 is for example 16 mm.
  • the circular arc 17 extends over an angle ⁇ , which is preferably greater than 90 °.
  • the Fig. 2 shows a further embodiment of the evaporator chamber 1 in section, in which the side wall 13 includes a straight portion 19.
  • the transition from the bottom 12 to the straight portion 19 of the side wall 13 is a first circular arc 20, which is characterized by a first radius of curvature R 1 .
  • the transition from the straight portion 19 to the projection 18 is a second circular arc 21, which is characterized by a second radius of curvature R 2 .
  • the first radius of curvature R 1 , the second radius of curvature R 2 and the length L of the straight portion 19 are determined according to the space conditions.
  • the smallest distance between the side wall 13 and the mixing wheel 4 is greater than in the Fig. 2 illustrated embodiment.
  • the smallest distance between the side wall 13 and the mixing wheel 4 is at most about 4.5 mm.
  • the smallest distance between any point on the mixing wheel 4 and any point on the side wall 13 more than 5 millimeters, typically 8 millimeters. Even a small increase in the smallest distance between the side wall 13 and the mixing wheel 4 causes more air circulates in this area and thus to a reduction of deposits.
  • the advantage of the inventive evaporator chamber is that there are no dead spaces for the flow of air, because in all embodiments, the side wall 13 is continuously formed from the bottom 12 to the projection 18.
  • vortices form in corners and behind edges, and the flow of air there is almost zero.
  • the heat which is discharged from the evaporator chamber to the inside, poorly dissipated, resulting in a higher temperature of the mixing wheel 4, the evaporator chamber and the surrounding air.
  • Hot oil vapors form long-chain hydrocarbons at such sites, which deposit as coke, which is difficult to dissolve, evaporate or burn.
  • Another advantage is that the mixing wheel 4 has a greater distance to the evaporator chamber 1. As a result, less oil vapor reaches the mixing wheel 4 and the temperature of the mixing wheel 4 is lower. Both effects cause the mixing wheel 4 scoffs less.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
EP08165000.4A 2007-10-01 2008-09-24 Brûleur avec une chambre d'évaporation Not-in-force EP2045521B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01561/07A CH700919B1 (de) 2007-10-01 2007-10-01 Brenner mit einer Verdampferkammer.

Publications (3)

Publication Number Publication Date
EP2045521A2 true EP2045521A2 (fr) 2009-04-08
EP2045521A3 EP2045521A3 (fr) 2014-03-05
EP2045521B1 EP2045521B1 (fr) 2015-07-01

Family

ID=40070618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08165000.4A Not-in-force EP2045521B1 (fr) 2007-10-01 2008-09-24 Brûleur avec une chambre d'évaporation

Country Status (2)

Country Link
EP (1) EP2045521B1 (fr)
CH (1) CH700919B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000012935A1 (fr) 1998-09-01 2000-03-09 Toby Ag Bruleur destine a des combustibles liquides
EP1162403A1 (fr) 2000-06-07 2001-12-12 Windhager Zentralheizung Aktiengesellschaft Chambre d'évaporation pour brûleur au fioul à prémélange
WO2004109183A1 (fr) 2003-06-11 2004-12-16 Toby Ag Bruleur pour combustibles liquides

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429967A1 (fr) * 1978-06-26 1980-01-25 Le Mer Joseph Procede de combustion d'un combustible liquide et bruleur pour sa mise en oeuvre
KR0127619Y1 (ko) * 1992-06-12 1998-11-02 윤종용 팬히터의 버너구조

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000012935A1 (fr) 1998-09-01 2000-03-09 Toby Ag Bruleur destine a des combustibles liquides
EP1162403A1 (fr) 2000-06-07 2001-12-12 Windhager Zentralheizung Aktiengesellschaft Chambre d'évaporation pour brûleur au fioul à prémélange
WO2004109183A1 (fr) 2003-06-11 2004-12-16 Toby Ag Bruleur pour combustibles liquides

Also Published As

Publication number Publication date
CH700919B1 (de) 2010-11-15
EP2045521A3 (fr) 2014-03-05
EP2045521B1 (fr) 2015-07-01

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