EP0015480A2 - Dispositif pour régler le mélange de chauffages au gaz - Google Patents

Dispositif pour régler le mélange de chauffages au gaz Download PDF

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Publication number
EP0015480A2
EP0015480A2 EP80100938A EP80100938A EP0015480A2 EP 0015480 A2 EP0015480 A2 EP 0015480A2 EP 80100938 A EP80100938 A EP 80100938A EP 80100938 A EP80100938 A EP 80100938A EP 0015480 A2 EP0015480 A2 EP 0015480A2
Authority
EP
European Patent Office
Prior art keywords
pressure
gas
line
combustion air
membrane
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
EP80100938A
Other languages
German (de)
English (en)
Other versions
EP0015480B1 (fr
EP0015480A3 (en
Inventor
Gustav Ing.-grad. Niedergesäss
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.)
EON Ruhrgas AG
Original Assignee
Ruhrgas 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 Ruhrgas AG filed Critical Ruhrgas AG
Publication of EP0015480A2 publication Critical patent/EP0015480A2/fr
Publication of EP0015480A3 publication Critical patent/EP0015480A3/de
Application granted granted Critical
Publication of EP0015480B1 publication Critical patent/EP0015480B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a method for regulating the mixture of gas and combustion air for gas furnaces with preheating of the combustion air supplied to the burner by a blower, and a converter for pressure or differential pressure to a proportional pressure for carrying out the method.
  • Burners with the supply of combustion air from a separate air blower are mainly used for industrial furnaces. In most cases, all of the combustion air is forced into the burner in this way. For the economical use of fuel energy, it is necessary to keep the optimal mixture ratio of gas and combustion air as constant as possible over the entire load range of the burner. If the temperatures of gas and combustion air are constant, the mixture ratio gas / combustion air can be kept constant with known constant pressure control systems.
  • the exhaust gas heat is used in many gas furnaces or, in tunnel kilns, the storage heat of the fuel gas is also used to preheat the combustion air, e.g. B. with the help of recuperators.
  • recuperators e.g. B. in start-up or load change operations occur in the known direct Re due to different combustion air temperatures, deviations from the optimal gas / air ratio, which have an unfavorable effect on fuel consumption and furnace performance.
  • this could only be avoided with the help of complex ratio control systems with flow measurement of gas and combustion air and electrical, pneumatic or hydraulic auxiliary energy for controlling the gas / air ratio.
  • the gas supply can only be regulated depending on the air pressure with a simple constant pressure control system if the differential pressure of the air at a measuring throttle or the air pressure is increased accordingly in order to act as a control variable on the To be able to act gas pressure regulator.
  • the object of the invention is accordingly to provide a method and a device for carrying it out, by means of which the mixing ratio of gas and combustion air can be kept constant in a simple manner, regardless of fluctuating temperatures of the combustion air.
  • Another object of the invention is to provide a way of regulating the mixing ratio of gas and combustion air even in those furnaces in which the pressure of the combustion air is considerably lower than the gas pressure.
  • the device for performing these tasks should be inexpensive to manufacture and operate with small control deviations.
  • the transmission ratio should be changeable from inlet pressure to outlet pressure.
  • a measuring throttle 2 preferably in the form of a measuring orifice or nozzle, is installed in the combustion air line 8.
  • the differential pressure which arises at this measuring throttle is fed to the pressure transducer 1 via the lines 6 and 7.
  • the differential pressure is converted in the pressure converter 1 into a higher proportional pressure, which acts via the line 14 as a control variable on the gas pressure regulator 11 arranged in the gas line 10.
  • the line 12 serves to supply the aid for the pressure transducer.
  • the line 13 is used to discharge the aid, for. B. when scaling down.
  • F i g. 2 shows an arrangement for carrying out the method according to claim 2.
  • a pressure measuring point 3 is installed in the combustion air line 8 in front of the recuperator 9.
  • the pressure of the combustion air supplied by the blower 4 to the burner 5 is supplied to the pressure converter 1 via the line 6.
  • the pressure is converted into an increased proportional pressure, which acts via the line 14 as a control variable on the gas pressure regulator 11 arranged in the gas line 10.
  • the line 12 serves to supply the aid for the pressure transducer.
  • the line 13 serves to remove the aid.
  • F i g. 3 shows a longitudinal section through an exemplary embodiment of the pressure transducer for carrying out methods 1 and 2.
  • the membrane 16 is accommodated in the housing 15. If the flow-dependent differential pressure coming from the orifice plate 2 is to be converted into a proportional pressure as a control variable for the gas pressure regulator, the top of the membrane 16 is connected via the line 6 and the opening 21 with the plus pressure and the bottom of the membrane 16 via the line 7 and the opening 22 is acted upon by the minus pressure of the measuring orifice 2. If, instead of the differential pressure, the pressure in the combustion air line is used as a control variable, only the top of the membrane 16 is acted upon via line 6 and the opening 21 with this pressure. The opening 22 then serves as a breathing opening, ie. that is, the pressure of the outside air is present on the underside of the membrane.
  • Differential pressure or pressure are converted with the help of the membrane 16 into a force which causes a change in the position of the actuator 18 via the membrane plate 17.
  • the normal position of the actuator is by a known correction and compensation device, for. B. the compensation spring 19 shown in Figure 3, set.
  • the force transmitted from the actuator 18 'to the force switch 20 is converted into a proportional force there.
  • It is advantageous to use a pneumatic power switch since the auxiliary means of this power switch, gas or air, can be removed directly from the gas or air line, so no third-party equipment is required.
  • the main components of the pneumatic force switch known per se are a bellows 23 and an alternative control 24.
  • the auxiliary means is fed to the force switch 20 via the line 12. In the equilibrium state, only leakage quantities of the aid are required.
  • the transmission ratio of the inlet pressure to the pressure which acts on the gas pressure regulator as a control variable, can either be changed in a smaller range from approx. 1: 4 to 1: 7 by moving the adjusting slide 26 on the transmission lever 25 or by exchanging the force switch 20 for a force switch with an effective cross-section if a significant change in the gear ratio is necessary, e.g. B. 1:20.
  • the above-described possibilities for changing the gear ratio can vary this within wide limits. Since the mode of operation of the pressure transducer according to the invention is based on a force comparison, the control range is large and the control deviations are significantly smaller than if the function is carried out by a path comparison. In addition, the pressure transducer is inexpensive to manufacture.

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)
EP19800100938 1979-03-02 1980-02-26 Dispositif pour régler le mélange de chauffages au gaz Expired EP0015480B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2908197 1979-03-02
DE19792908197 DE2908197C2 (de) 1979-03-02 1979-03-02 Vorrichtung zum Konstanthalten des Mischungsverhältnisses von Gas und Verbrennungsluft bei Gebläsebrennern

Publications (3)

Publication Number Publication Date
EP0015480A2 true EP0015480A2 (fr) 1980-09-17
EP0015480A3 EP0015480A3 (en) 1981-01-07
EP0015480B1 EP0015480B1 (fr) 1984-06-20

Family

ID=6064302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800100938 Expired EP0015480B1 (fr) 1979-03-02 1980-02-26 Dispositif pour régler le mélange de chauffages au gaz

Country Status (2)

Country Link
EP (1) EP0015480B1 (fr)
DE (1) DE2908197C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165347A (en) * 1984-10-04 1986-04-09 British Gas Corp Burner air/gas ratio control
GB2185810A (en) * 1986-01-28 1987-07-29 Landis & Gyr Ag Methods of and apparatus for regulating the amounts of gas and air for gas blower burners
DE3818363A1 (de) * 1987-10-19 1989-04-27 Landis & Gyr Ag Verfahren und vorrichtung zur gas- luft-mengenregelung fuer gasgeblaesebrenner
EP0390964A2 (fr) * 1989-04-07 1990-10-10 Honeywell B.V. Dispositif de commande pour brûleur à gaz
EP0589404A1 (fr) * 1992-09-21 1994-03-30 G. Kromschröder Aktiengesellschaft Procédé et dispositif pour commander un courant de gaz
CN109442405A (zh) * 2018-12-26 2019-03-08 广州威茨热能技术有限公司 一种空燃比例混合器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009591A1 (de) * 1980-03-13 1981-09-17 G. Kromschröder AG, 4500 Osnabrück Regelvorrichtung zur regelung des mischungsverhaeltnisses von brenngas und luft bei gasbrennern
DE3545264A1 (de) * 1985-12-20 1987-06-25 Ruhrgas Ag Vorrichtung zur gemischregelung von gas und verbrennungsluft fuer gasfeuerungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443259A (en) * 1934-11-22 1936-02-25 James Keith Apparatus for effecting the proportional delivery of combustible and combustion-supporting media to furnaces and the like
AT196999B (de) * 1954-05-26 1958-04-10 Askania Werke Ag Einrichtung zum selbsttätigen Konstanthalten des Mengenverhältnisses zweier strömender Medien, insbesondere Gas-Warmluft-Gemischregler
DE1751350A1 (de) * 1967-05-15 1971-12-30 Tokyo Gas Co Ltd Luft-Gasstrom-Proportionalregler
DE2412720A1 (de) * 1974-03-16 1975-09-25 Gerlach Werke Gmbh Vorrichtung zum einstellen und selbsttaetigen regeln des mischverhaeltnisses eines gas-luftgemisches

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834242A1 (de) * 1978-08-04 1980-02-14 Kromschroeder Ag G Gemisch-regeleinrichtung fuer gasgeblaesebrenner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443259A (en) * 1934-11-22 1936-02-25 James Keith Apparatus for effecting the proportional delivery of combustible and combustion-supporting media to furnaces and the like
AT196999B (de) * 1954-05-26 1958-04-10 Askania Werke Ag Einrichtung zum selbsttätigen Konstanthalten des Mengenverhältnisses zweier strömender Medien, insbesondere Gas-Warmluft-Gemischregler
DE1751350A1 (de) * 1967-05-15 1971-12-30 Tokyo Gas Co Ltd Luft-Gasstrom-Proportionalregler
DE2412720A1 (de) * 1974-03-16 1975-09-25 Gerlach Werke Gmbh Vorrichtung zum einstellen und selbsttaetigen regeln des mischverhaeltnisses eines gas-luftgemisches

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165347A (en) * 1984-10-04 1986-04-09 British Gas Corp Burner air/gas ratio control
GB2185810A (en) * 1986-01-28 1987-07-29 Landis & Gyr Ag Methods of and apparatus for regulating the amounts of gas and air for gas blower burners
GB2185810B (en) * 1986-01-28 1989-11-01 Landis & Gyr Ag Methods of and apparatus for regulating the amounts of gas and air for gas blower burners
DE3818363A1 (de) * 1987-10-19 1989-04-27 Landis & Gyr Ag Verfahren und vorrichtung zur gas- luft-mengenregelung fuer gasgeblaesebrenner
EP0390964A2 (fr) * 1989-04-07 1990-10-10 Honeywell B.V. Dispositif de commande pour brûleur à gaz
EP0390964A3 (en) * 1989-04-07 1990-12-27 Honeywell Bv Control device for gas burners
EP0589404A1 (fr) * 1992-09-21 1994-03-30 G. Kromschröder Aktiengesellschaft Procédé et dispositif pour commander un courant de gaz
CN109442405A (zh) * 2018-12-26 2019-03-08 广州威茨热能技术有限公司 一种空燃比例混合器
CN109442405B (zh) * 2018-12-26 2023-12-05 广州威茨热能技术有限公司 一种空燃比例混合器

Also Published As

Publication number Publication date
EP0015480B1 (fr) 1984-06-20
DE2908197A1 (de) 1980-09-04
DE2908197C2 (de) 1985-08-22
EP0015480A3 (en) 1981-01-07

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