EP2592344A1 - Gasheizkessel mit Vormischung - Google Patents

Gasheizkessel mit Vormischung Download PDF

Info

Publication number
EP2592344A1
EP2592344A1 EP12187102.4A EP12187102A EP2592344A1 EP 2592344 A1 EP2592344 A1 EP 2592344A1 EP 12187102 A EP12187102 A EP 12187102A EP 2592344 A1 EP2592344 A1 EP 2592344A1
Authority
EP
European Patent Office
Prior art keywords
supply
gas
pressure
servomotor
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.)
Withdrawn
Application number
EP12187102.4A
Other languages
English (en)
French (fr)
Inventor
Philippe Barday
Luc Lethenet
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.)
Guillot Industrie SAS
Original Assignee
Guillot Industrie SAS
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 Guillot Industrie SAS filed Critical Guillot Industrie SAS
Publication of EP2592344A1 publication Critical patent/EP2592344A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/002—Regulating air supply or draught using electronic means
    • 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
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/007—Regulating air supply or draught using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/10—High or low fire

Definitions

  • the present invention relates to a gas boiler and a method of operating a gas boiler.
  • the gaseous premix is produced by a mixer fed by an oxidizing air supply duct and by a fuel gas supply duct.
  • a gaseous premix feed conduit fluidly connects the mixer to the burner.
  • the gas boiler conventionally comprises a pneumatic valve arranged to regulate the flow of gas flowing in the gas supply duct.
  • This pneumatic valve is equipped with a shutter housed inside the gas supply conduit and a pneumatic servomotor converting a supply pressure into a displacement of the shutter.
  • the servomotor is supplied with a supply pressure equal to the pressure of the air inside the air supply duct so that the gaseous premix always has an excess of air of the order of 30%. Under these conditions, the amount of polluting gases, such as nitrogen oxides or carbon oxides, produced by the combustion of the gaseous premix is minimized.
  • Ignition of the gas premix is not definitely achieved and generally results in a momentary chattering or pumping phenomenon generating acoustic discomfort for the user and possibly causing a safety of the boiler due to the absence of flame in the boiler. result of the ignition sequence.
  • the circulation of gas in the gas supply duct is prohibited.
  • the fan arranged to blow air into the air supply duct is controlled to rotate at a maximum speed.
  • the air pressure in the air supply duct and the pressure exerted on the booster are maximum.
  • the section of passage of the gas supply duct left free by the shutter is then also maximum.
  • the fan is controlled to run at a normal speed below the maximum speed.
  • the air pressure in the air supply circuit decreases.
  • the pressure exerted on the servomotor decreases more slowly thanks to the diaphragm and the buffer tank.
  • the passage section of the gas supply duct left free by the shutter then remains substantially maximum.
  • the circulation of gas in the gas supply duct is authorized.
  • the passage section of the gas supply duct left free by the shutter being substantially maximum, the richness of the gaseous premix is also substantially maximum.
  • a disadvantage of such a boiler is that the pressure exerted on the booster before ignition is poorly mastered. Indeed, the pressure is not constant over time. Also, the richness of the gaseous premix is approximately controlled.
  • the invention aims to overcome this drawback.
  • electromechanical device means in particular a fan or a compressor.
  • the first electromechanical device is a fan.
  • This fan can be housed upstream of the mixer in the air supply circuit or downstream of the mixer.
  • the gas boiler according to the invention is advantageous in that the excess air of the gaseous premix is reduced before, and until, the ignition of this gaseous premix, so as to facilitate this ignition. After the gaseous mixture is ignited, the excess air of the gaseous premix is increased so as to limit the amount of pollutants produced by the combustion.
  • the valve is configured so that for a supply pressure equal to the first supply pressure, the excess air of the gaseous premix is between 0% and 20%, and that for a pressure of supply equal to the second supply pressure, the excess air of the gaseous premix is of the order of 30%.
  • the second electromechanical device is distinct from the first electromechanical device and is specifically designed to exert the first pressure on the servomotor.
  • the pressure exerted on the servomotor can be adjusted independently of the pressure of the air in the air supply duct. Indeed, the pressure exerted on the servomotor depends solely on the starting or stopping of the second electromechanical device.
  • the gas boiler according to the invention may comprise one or more of the following characteristics.
  • the feed time of the servomotor with the first pressure is minimized, and by the same the amount of gaseous pollutants produced is reduced.
  • the servomotor is powered with the first pressure for a period potentially longer than the time required to ignite the gaseous premix. Under these conditions, the risk of extinction of the flame when the supply pressure switches from the first to the second supply pressure is reduced.
  • the second electromechanical device housed inside the first manifold comprises a fan.
  • the figure 1 represents a gas boiler 1 having a focus 2.
  • the hearth 2 contains a heat exchanger 4 connected to a heating network (not shown).
  • the hearth 2 contains a burner 6.
  • This burner 6 is equipped with a head 8 adapted to diffuse a gaseous premix inside the hearth 2.
  • the burner 6 is equipped with an ignition electrode 10 adapted to ignite the premix gaseous.
  • the burner 6 is finally equipped with an ionization electrode 12 adapted to detect a flame produced by the combustion of the gaseous premix.
  • the boiler 1 comprises a duct 14 for supplying gaseous premixing fluidly connecting the burner 6 to a mixer 16.
  • This mixer 16 is supplied by a circuit 18 for supplying air and a duct 21 for supplying a fluidically connected gas. to a gas distribution network or a bombone (not shown).
  • the circuit 18 takes the form of a duct equipped with an air filter 19.
  • the circuit 18 could take the form of only a filter 19 fluidly connected to the mixer 16 or a mouth formed in the mixer 16.
  • the mixer 16 is a venturi mixer.
  • the mixer 16 comprises a body 22 equipped with a calibrated orifice 24.
  • An end portion 21a of the conduit 14 opens into the body 22 downstream of the calibrated orifice 24.
  • the end portion 21a is equipped with a calibrated orifice 26.
  • the boiler 1 comprises a fan 20.
  • the fan 20 makes it possible, on the one hand, to draw air into the duct 14 and, on the other hand, to drive the premix gas from the mixer 16 to the burner 6.
  • the boiler 1 comprises a valve 27 arranged to close, and alternately to disengage, the conduit 21.
  • the shutter 30 and the servomotor 32 are configured such that an increase in the supply pressure of the servomotor 32 causes an increase in the passage section of the duct 21, and thereby an increase in the flow of gas flowing in the duct 21.
  • the boiler 1 further comprises a timer 42 adapted to measure a predetermined duration.
  • the unit 40 and the timer 42 are housed in a security cabinet 46.
  • a first method of operation of the boiler 1 is now described with reference to the figure 3 .
  • the unit 40 controls the ignition of the premix gas, in response to a predetermined event, for example in response to a starting temperature of the water leaving the boiler below a set temperature.
  • the unit 40 controls the closing of the duct 21 by the valve 27 so that the flow of gas flowing in the duct 21 is canceled.
  • the unit 40 controls the start of the fan 20 so as to ventilate the home with a gaseous premix consisting solely of air.
  • the unit 40 controls the ignition electrode 10 in order to continuously generate an electric arc in the vicinity of the burner 6.
  • the unit 40 controls the clearance of the duct 21 by the valve 27 so as to initiate the circulation of gas in the duct 21.
  • the supply means 34 feeds the servomotor 32 with the ignition supply pressure, which is greater than the pressure of the air inside the circuit 18.
  • the unit 40 controls the starting of the fan 38.
  • the shutter 30 is positioned by the servomotor 32 so as to increase the flow of gas flowing in the conduit 21.
  • the excess air of the gaseous premix is then, for example, between 0% and 20% .
  • the unit 40 triggers the timer 42.
  • the supply means 34 feeds the servomotor 32 with the so-called steady-state pressure substantially equal to the pressure of the air inside the duct.
  • the unit 40 turns off the fan 38.
  • the shutter 30 is positioned by the servomotor 32 so as to reduce the flow of gas flowing in the conduit 21.
  • the excess air of the gaseous premix is then of the order of 30%.
  • the unit 40 controls the closing of the conduit 21 by the valve 27 and the unit 40 stops the fan 38 .
  • the first method can be carried out a predetermined number of times, depending on the power of the boiler 1, so as to renew the attempt to ignite the premix gas.
  • Steps 58 and 60 can be swapped.
  • a second method of operation of the boiler 1 is described with reference to the figure 4 .
  • This second method is identical to the first method described with reference to the figure 3 with the exception that steps 62, 64 and 66 are replaced by steps 68, 70, and 72.
  • step 50 the unit 40 controls the ignition of the premix gas, in response to a predetermined event, for example in response to a starting temperature of the water leaving the boiler below a set temperature.
  • step 52 the unit 40 controls the closing of the duct 21 by the valve 27 so that the flow of gas flowing in the duct 21 is canceled.
  • step 54 the unit 40 controls the start of the fan 20 so as to ventilate the furnace with a premix gas consisting solely of air.
  • step 56 the unit 40 controls the ignition electrode 10 to continuously generate an electric arc in the vicinity of the burner 6.
  • step 58 initiated during steps 56 or 58, the unit 40 controls the clearance of the duct 21 by the valve 27 so as to initiate the circulation of gas in the duct 21.
  • step 60 the supply means 34 supply the servomotor 32 with the so-called ignition supply pressure greater than the pressure of the air inside the circuit 18.
  • the unit 40 controls the starting of the fan 38.
  • the shutter 30 is positioned by the servomotor 32 so as to increase the flow of gas flowing in the conduit 21.
  • the excess air of the gaseous premix is then, for example, between 0% and 20% .
  • step 68 the unit 40 triggers the timer 42 and waits until a predetermined time has elapsed.
  • the second method can be implemented a predetermined number of times, depending on the power of the boiler 1, so as to renew the attempt to ignite the premix gas.
  • Steps 58 and 60 can be swapped.
  • a first operating method of the boiler 100 is identical to the operating method of the boiler 1 described with regard to the figure 3 with the exception that in step 60 unit 111 commands the setting run of the compressor 110, and in the steps 64 and 66 the unit 111 controls the shutdown of the compressor 110.
  • a second operating method of the boiler 100 is identical to the operating method of the boiler 1 described with reference to FIG. figure 4 with the exception that in step 60 the unit 111 controls the start of the compressor 110, and in the steps 70 and 72 the unit 111 controls the shutdown of the compressor 110.
  • the invention is not limited to the embodiments of gas boilers and operating methods described above by way of example, it encompasses all variants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
EP12187102.4A 2011-11-08 2012-10-03 Gasheizkessel mit Vormischung Withdrawn EP2592344A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1160153A FR2982342A1 (fr) 2011-11-08 2011-11-08 Chaudiere a gaz a pre-melange

Publications (1)

Publication Number Publication Date
EP2592344A1 true EP2592344A1 (de) 2013-05-15

Family

ID=46924371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12187102.4A Withdrawn EP2592344A1 (de) 2011-11-08 2012-10-03 Gasheizkessel mit Vormischung

Country Status (2)

Country Link
EP (1) EP2592344A1 (de)
FR (1) FR2982342A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111102570A (zh) * 2020-01-02 2020-05-05 北京市伟业供热设备有限责任公司 适应不同海拔高度的低氮燃气锅炉

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501749A1 (de) * 1995-01-21 1996-07-25 Stiebel Eltron Gmbh & Co Kg Verfahren und Vorrichtung zum Steuern eines Gas-Gebläsebrenners
EP0768493A2 (de) 1995-10-11 1997-04-16 VIESSMANN WERKE GmbH & CO. Verfahren und Vorrichtung zum Zünden eines Gasgebläsebrenners
DE19820192A1 (de) * 1997-04-28 1998-11-26 Vaillant Joh Gmbh & Co Verfahren zur Zündung eines gasbeheizten Brenners
DE10050254C1 (de) * 2000-10-11 2002-10-24 Viessmann Werke Kg Verfahren zum Zünden eines Gasgebläsebrenners und Gasgebläsebrenner zur Durchführung des Verfahrens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501749A1 (de) * 1995-01-21 1996-07-25 Stiebel Eltron Gmbh & Co Kg Verfahren und Vorrichtung zum Steuern eines Gas-Gebläsebrenners
EP0768493A2 (de) 1995-10-11 1997-04-16 VIESSMANN WERKE GmbH & CO. Verfahren und Vorrichtung zum Zünden eines Gasgebläsebrenners
DE19820192A1 (de) * 1997-04-28 1998-11-26 Vaillant Joh Gmbh & Co Verfahren zur Zündung eines gasbeheizten Brenners
DE10050254C1 (de) * 2000-10-11 2002-10-24 Viessmann Werke Kg Verfahren zum Zünden eines Gasgebläsebrenners und Gasgebläsebrenner zur Durchführung des Verfahrens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111102570A (zh) * 2020-01-02 2020-05-05 北京市伟业供热设备有限责任公司 适应不同海拔高度的低氮燃气锅炉
CN111102570B (zh) * 2020-01-02 2021-08-03 北京热力装备制造有限公司 适应不同海拔高度的低氮燃气锅炉

Also Published As

Publication number Publication date
FR2982342A1 (fr) 2013-05-10

Similar Documents

Publication Publication Date Title
WO2008041478A1 (en) Method and device for starting and stopping gas turbine
JP2007232262A (ja) コージェネレーションプラント及びその運転方法
JP6311874B2 (ja) ボイラ
EP2592344A1 (de) Gasheizkessel mit Vormischung
JP6485790B2 (ja) ボイラ
JP2007132576A (ja) 連結型給湯装置
JP4768465B2 (ja) バイオマス燃料の着火方法
JP4881083B2 (ja) 燃焼装置
JP7460489B2 (ja) 燃焼装置
JP2016153712A (ja) ボイラ
JP2023174146A (ja) ガスバーナのパージ方法
JP2016006356A (ja) ボイラ
JP5552786B2 (ja) 石炭焚きボイラ設備の運転停止方法及びその運転停止装置
JP4191359B2 (ja) 連続燃焼を行うボイラ
JP2017166755A (ja) 燃焼装置
JP4176686B2 (ja) パイロットバーナを持った燃焼装置
CN110023680B (zh) 燃料运行的车辆加热器和用于运行该燃料运行的车辆加热器的方法
JP2004205129A (ja) ボイラの燃焼制御方法およびその装置
JP4605656B2 (ja) 火力発電用ボイラと燃焼用空気供給制御方法
JP4039966B2 (ja) 排ガス再燃焼式の燃焼装置
JP4166190B2 (ja) コージェネレーションシステム
JPH08261445A (ja) ガスバーナの着火燃焼方法
KR20110128475A (ko) 목질계 고형 바이오연료 연소기기의 다차 연소 장치
JP2017215058A (ja) 熱源機
JPH0454134B2 (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20131115

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180501