EP2287531A2 - Dispositif de mélange gaz de combustion-air pour un système de combustion - Google Patents

Dispositif de mélange gaz de combustion-air pour un système de combustion Download PDF

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Publication number
EP2287531A2
EP2287531A2 EP10171713A EP10171713A EP2287531A2 EP 2287531 A2 EP2287531 A2 EP 2287531A2 EP 10171713 A EP10171713 A EP 10171713A EP 10171713 A EP10171713 A EP 10171713A EP 2287531 A2 EP2287531 A2 EP 2287531A2
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel gas
stage
air
gas
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
EP10171713A
Other languages
German (de)
English (en)
Other versions
EP2287531B1 (fr
EP2287531A3 (fr
Inventor
Joao Guerreiro
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2287531A2 publication Critical patent/EP2287531A2/fr
Publication of EP2287531A3 publication Critical patent/EP2287531A3/fr
Application granted granted Critical
Publication of EP2287531B1 publication Critical patent/EP2287531B1/fr
Active 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
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2400/00—Pretreatment and supply of gaseous fuel
    • F23K2400/20—Supply line arrangements
    • F23K2400/201—Control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05001—Control or safety devices in gaseous or liquid fuel supply lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F23N2225/06—Measuring pressure for determining flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves

Definitions

  • the invention relates to a method for setting an outlet pressure of a fuel gas volume flow at an outlet of a gas valve for a combustion system, in particular for a gas burner, according to the preamble of patent claim 1.
  • the invention relates to a device for adjusting an outlet pressure of a fuel gas volume flow at an outlet of a gas valve for a combustion system, in particular for a gas burner, according to the preamble of claim 6.
  • the invention also relates to a fuel gas-air mixing device, in particular a fuel gas-air mixing device for generating and supplying a fuel gas-air mixture for a combustion system, in particular for a gas burner, according to the preamble of claim 10.
  • the invention relates to a combustion system, in particular a combustion system with a gas burner, according to the preamble of claim 11.
  • Combustion gas / air mixing devices, and methods and apparatus for adjusting an output pressure of a fuel gas volume flow at an exit of a gas valve for a combustion system, particularly for a gas burner, are generally known in the art.
  • a fuel gas-air mixture via a pneumatic circuit having a gas valve, upstream of a blower is completely made.
  • the gas valve ensures that a gas pressure always corresponds to a reference pressure.
  • the gas premixing valve has a control diaphragm. On one side of the membrane is a reference pressure. On the other side is an outlet pressure. The applied pressure on the sides are similar, so that only small forces on the membrane attack. This causes the membrane to be potentially unstable. Due to the instability, the premix gas valve has a low flow restriction. In addition, the valve construction is very sensitive.
  • the invention has for its object to provide an apparatus and a method for adjusting an output pressure of a fuel gas volume flow at an output of a gas valve for a combustion system, which are less sensitive and more stable over a larger gas flow area.
  • the invention is further based on the object, a fuel gas-air mixing device, in particular a fuel gas-air mixing device for generating and supplying a fuel gas-air mixture for a combustion system and a combustion system, in particular a combustion system with a gas burner, with a device according to the invention to create, which realize an effective operation at a reduced total cost, and work stable and insensitive even at higher flow rates.
  • a fuel gas-air mixing device in particular a fuel gas-air mixing device for generating and supplying a fuel gas-air mixture for a combustion system and a combustion system, in particular a combustion system with a gas burner
  • the pressure in the first stage is reduced to a reference pressure plus a predetermined pressure component.
  • the reduced pressure is further reduced by the predetermined pressure fraction to the reference pressure.
  • Yet another embodiment of the present invention provides that the pressure in the second stage is constantly reduced by the pressure fraction to the reference pressure.
  • the device according to the invention for setting an outlet pressure of a fuel gas volume flow at an outlet of a gas valve for a combustion system, in particular for a gas burner, are premixed in the air and fuel gas and the output pressure of the fuel gas is adjusted before inlet into a mixing chamber equal to a reference pressure, characterized in that means for carrying out the method according to the invention are provided.
  • the means comprise at least one two-stage control valve, in particular a two-stage zero-pressure control valve, for setting the pressure of the fuel-air mixture in two stages.
  • the two-stage control valve for the first stage comprises a servo-pressure regulator valve unit in order to reduce an applied pressure on the input side.
  • the second stage two-stage control valve includes a pressure drop valve unit to effect a pressure drop, particularly a constant pressure drop.
  • the fuel gas-air mixing device in particular a fuel gas-air mixing device for generating and supplying a fuel gas-air mixture for a combustion system, in particular for a gas burner, are premixed in the air and fuel gas and the pressure of a fuel gas volume flow in front of an inlet Mixing space is set equal to a reference pressure is characterized in that at least one device according to the invention is included.
  • the combustion system according to the invention in particular a combustion system with a gas burner, are premixed in the air and fuel gas and the pressure of a fuel gas volume flow is adjusted before inlet into a mixing chamber equal to a reference pressure, characterized in that at least one fuel gas-air mixing device according to the invention is included.
  • Fig. 1 schematically shows a fuel gas-air mixing device 10.
  • the fuel gas-air mixing device 10 comprises two supply lines 1, 2, which open into a common feed line 3.
  • the first feed line 1 is designed for a supply of air A.
  • the second supply line 2 is designed for the supply of a fuel gas B.
  • a device 4 for setting an output pressure Pout of a fuel gas volume flow is provided in the second feed train 2.
  • the device 4 comprises a two-stage control valve 5, which in Fig. 2 is described in more detail. Via a pressure line 6, the device 4, more precisely the control valve 5, fluidly connected to the first feed line 1, so that serving as a reference pressure Pref reference pressure of the air supply to the control valve 5 is applied. At an output of the control valve 5, the output pressure of the gas Pout is applied.
  • the control valve 4 is formed so that the gas outlet pressure Pout corresponds to the reference pressure Pref. Downstream of the control valve 5, a regulator 7 is provided for adjusting a gas pressure for the mouth region in the common Zu accommodationssstrang 3.
  • the feed strands including the mouth region of the feed strands 1, 2 are in the embodiment according to Fig. 1 designed as Venturi tube 8.
  • the mixed fuel gas B and air A fuel gas-air mixture M continues to flow via a feed device 9, which in the embodiment according to FIG. 1 includes a fan. From the fan, the fuel gas-air mixture M is led into a burner space 11 of a gas burner, where it is used for combustion, as represented by the plurality of flames 12.
  • Fig. 2 schematically shows an embodiment of a device 4 with two-stage control valve 5.
  • the fuel gas B flows with an input pressure Pi in a first control valve portion 50a.
  • the first control valve portion 50a is delimited to an adjacent control valve portion 50b by a diaphragm 52 to which on the one side of the diaphragm 52 consequently the input pressure Pi is applied.
  • the diaphragm 52 is additionally loaded with a pressure Pc of a compression spring acting on the diaphragm 52.
  • a reference pressure Pref which can be set via a further pressure spring is applied to one side. Coupled to the membrane 53 is an actuating element 54 with which access to the membrane 53 can be opened and closed.
  • the first control valve portion 50a is connected to the second control valve portion 50b via a first fuel gas passage 55a having a regulator 56 for adjusting gas flow.
  • the membranes 52 and 53 are, as described, each biased by a compression spring or additionally pressure-loaded.
  • the reference pressure Pref is increased by a pressure component Px.
  • the second control valve section 50b is connected to the fourth control valve section 20d via a further, second fuel gas line 55b.
  • a control element 56 is also provided in the second fuel gas line 55b.
  • the above-described elements and units form a first pressure stage I of the control valve 50. Downstream of this is a second pressure stage II, in which the reference pressure Pref increased by the pressure component Px is constantly reduced to the reference pressure Pref.
  • the fourth control valve section 50d is delimited via a further diaphragm 58 to a fifth control valve section 50e.
  • the fourth control valve section 50d is connected to the fifth control valve section 50e.
  • the membrane 58 is an adjustable Spring biased or pressurized.
  • a constant pressure throttling is effected via the spring bias.
  • the diaphragm 58 separates the fifth control valve portion 50e from a sixth control valve portion 50f.
  • the sixth control valve portion 50f is connected to the fifth control valve portion 50e via a fourth fuel gas passage 55d.
  • the fourth fuel gas line 55d likewise comprises a control element 56 for flow control, in particular a binary flow control element.
  • the second stage II is carried by the components a constant Reduzierzung the pressure to an output pressure Pout, which corresponds to the reference pressure Pref.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
EP10171713.0A 2009-08-18 2010-08-03 Dispositif de mélange de combustible et d'air pour un système de combustion Active EP2287531B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009037890A DE102009037890B4 (de) 2009-08-18 2009-08-18 Vorrichtung zum Einstellen eines Ausgangsdrucks eines Brenngasvolumenstromes, Verfahren zum Einstellen eines Ausgangsdrucks sowie Verwendung der Vorrichtung in einer Brenngas-Luft-Mischeinrichtung für ein Verbrennungssystem

Publications (3)

Publication Number Publication Date
EP2287531A2 true EP2287531A2 (fr) 2011-02-23
EP2287531A3 EP2287531A3 (fr) 2014-12-31
EP2287531B1 EP2287531B1 (fr) 2020-02-19

Family

ID=43067036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10171713.0A Active EP2287531B1 (fr) 2009-08-18 2010-08-03 Dispositif de mélange de combustible et d'air pour un système de combustion

Country Status (2)

Country Link
EP (1) EP2287531B1 (fr)
DE (1) DE102009037890B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100414A (zh) * 2013-04-15 2014-10-15 福特环球技术公司 可变压力气体燃料调节器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020121597A1 (de) 2020-08-18 2022-02-24 Vaillant Gmbh Verfahren und Anordnung zur pneumatischen Gemischbildung bei einem Vormischbrenner

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251025A (en) * 1979-07-12 1981-02-17 Honeywell Inc. Furnace control using induced draft blower and exhaust stack flow rate sensing
DE9316918U1 (de) * 1993-11-05 1994-01-13 Karl Dungs GmbH & Co, 73660 Urbach Mehrfachstellgerät mit eingangsseitigem Regler
DE19722600C2 (de) * 1997-05-30 2002-06-27 Dungs Karl Gmbh & Co Servoregler
DE29808799U1 (de) * 1998-05-15 1999-09-16 Honeywell B.V., Amsterdam Regeleinrichtung für Gasbrenner
US7789657B2 (en) * 2007-10-03 2010-09-07 Honeywell International Inc. Pressure regulator with bleed orifice

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100414A (zh) * 2013-04-15 2014-10-15 福特环球技术公司 可变压力气体燃料调节器
US20140305406A1 (en) * 2013-04-15 2014-10-16 Ford Global Technologies, Llc Variable pressure gaseous fuel regulator
US9273638B2 (en) * 2013-04-15 2016-03-01 Ford Global Technologies, Llc Variable pressure gaseous fuel regulator
CN104100414B (zh) * 2013-04-15 2019-04-12 福特环球技术公司 可变压力气体燃料调节器

Also Published As

Publication number Publication date
DE102009037890A1 (de) 2011-02-24
DE102009037890B4 (de) 2013-07-18
EP2287531B1 (fr) 2020-02-19
EP2287531A3 (fr) 2014-12-31

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