EP0047048A1 - Gas burner and gas supply control depending on the pressure in the combustion chamber - Google Patents

Gas burner and gas supply control depending on the pressure in the combustion chamber Download PDF

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Publication number
EP0047048A1
EP0047048A1 EP81302443A EP81302443A EP0047048A1 EP 0047048 A1 EP0047048 A1 EP 0047048A1 EP 81302443 A EP81302443 A EP 81302443A EP 81302443 A EP81302443 A EP 81302443A EP 0047048 A1 EP0047048 A1 EP 0047048A1
Authority
EP
European Patent Office
Prior art keywords
burner
gas
fan
combustion chamber
burner head
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Withdrawn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
EP81302443A
Other languages
German (de)
English (en)
French (fr)
Inventor
Anthony Crispin Fells
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.)
Powrmatic Ltd
Original Assignee
Powrmatic Ltd
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 Powrmatic Ltd filed Critical Powrmatic Ltd
Publication of EP0047048A1 publication Critical patent/EP0047048A1/en
Withdrawn legal-status Critical Current

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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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • 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
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • 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
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration

Definitions

  • the present invention relates to gas burners and has particular reference to gas burners suitable for use in combination with boiler fed heating systems.
  • British Patent Specification No. 1,286,356 discloses a multi-port gas burner comprising an array of ports in the curved wall member and a rotary blower adapted to blow a substantially uniform mixture of gas and air through the ports to form, when operated under a constant temperature conditions, jets with an angle of divergence greater than the angle of divergence between the centre lines of adjacent ports caused by the curvature of the wall member.
  • This specification specifically describes an arrangement in which gas and air are supplied separately to a fan unit and mixed therein and then fed to the burner head which comprises a plurality of holes spaced in a pattern to provide gas outlets and a generally cylindrical flame for the burner head.
  • a gas burner comprising a cylindrical burner head having a plurality of burner orifices in a cylindrical surface thereof, fan means for supplying a gas air mixture to said burner head, gas supply means for supplying a combustible gas within the vicinity of the fan inlet so that the fan means takes in atmospheric air and gas from said supply means and a zero governor included in the gas supply means, said governor being connected between the outlet for said fan means and a combustion chamber for the burner so that when the pressure in the combustion chamber relative to the fan supply means increases above a predetermined datum the gas supply is shut off.
  • Such an arrangement has the advantage that the flame is directed around a cylindrical burner head extending into a combustion chamber. This provides more even heating of the surfaces of the combustion chamber and the combustion chamber can, therefore, be configured to accept such an arrangement and to provide a more compact boiler installation for a given heat output.
  • the cylindrical burner head may have in its cylindrical surface a plurality of holes extending over a major part of its longitudinal length and a layer of metal gauze covering each hole.
  • the gauze may be disposed either outwardly of the burner head or interiorly thereof and serves to stabilise the flame pattern about the head itself and to provide a back pressure within the burner.
  • the burner head may comprise a cylindrical tube closed at a first end and open at a second end for communication with said fan means.
  • the burner head may include guide means disposed therein to ensure substantially uniform combustion of the gas air mixture along said surface of the burner head.
  • the guide, means is preferably conical in form and is disposed within the cylindrical tube with a portion of the cone of greatest diameter disposed towards the first end thereof.
  • a zero governor may be included in a gas supply means the governor being connected between the fan means outlet and the combustion chamber so that when the pressure in the combustion chamber relative to the fan supply pressure increases above a predetermined datum the gas supply is shut off.
  • the gauze serves to maintain a pressure barrier whereby the pressure maintained by the fan means within the burner is, under normal conditions, greater than the pressure within the combustion chamber.
  • such a device has been found to be quieter in operation and may be modulated merely by adjusting the fan speed to rate between the specified limits.
  • the device is self-compensating for conditions within the combustion chamber for example.should the flue outlet be blocked, the unit shuts down automatically.
  • the burner indicated generally at 10 comprises a burner head 11 comprising a substantially cylindrical tube 12 closed at a first end 13 by means of a plug 14.
  • the cylindrical tube 12 is provided with a plurality of radially disposed holes 15 disposed in circumferentially spaced rows, each row extending longitudinally of tube 12.
  • the plug 14 carries a frustoconical guide 16, the base portion of which is contiguous plug 14 and the narrow portion 17 is disposed within tube 12 and towards a second end 18 of cylindrical tube 12.
  • the narrow end 17 is supported by means of a spider 19 so that the frustoconical guide 16 is substantially coaxial with the tube 12.
  • the second end 18 of the cylindrical-tube 12 is open and is provided with a sealing gasket 20 on the inner surface.
  • the burner head 11 communicates with a cylindrical supply tube 21 which is connected with . the outlet of a centrifugal fan 23.
  • the centrifugal fan 23 is disposed so that its rotor 24 rotates about a substantially vertical axis and the inlet therefor is disposed in the lower surface of the fan 23, the arrangement being such that on operation of the fan, air is drawn in through inlet 25 and supplied via the supply tube 21 to the interior of burner head 11.
  • a gas nozzle 26 is disposed beneath inlet 25 and spaced downwardly thereof so that on operation of the fan and with gas issuing from the nozzle 26, a mixture of gas and air is taken into the fan, substantially uniformly mixed and supplied to supply tubes 21.
  • the supply tube 21 is mounted in a carrier plate 30 which also supports an ignition electrode 31.
  • the internal surface of burner head 11 is provided with a sheet of gauze 32.
  • the fan 23 is driven to commence the air supply to the nozzle head 11.
  • the ignition electrode 31 is caused to spark and gas is . supplied by nozzle 26 to the fan inlet 25.
  • the gas air mixture is supplied to the internal surface of the cylindrical nozzle head 11 where it passes through the gauze 32 which serves to maintain a back pressure within the apparatus and passes out of the holes 15 to provide, on ignition a substantially cylindrical flame.
  • the frustoconical guide plate 16 serves to maintain a substantially uniform gas supply along the length of the nozzle.
  • Figure 2 illustrates the emodiment of Figure 1 including a zero operation governor 40 having an upper case portion 41 and a lower case portion 42.
  • Each upper and lower case portion carries a mounting for a vertically slidable plunger 43 which is fixedly connected to a diaphragm 44 spring loaded by means of spring 45 in an upward direction (in Figure 2).
  • the cavity defined by the upper casing portion 41 is connected by means of conduit 46 to supply conduit 21 and the lower cavity defined by the lower case portion 42 is connected by means of second supply conduit 47.
  • plunger 43 is connected to a pressure switch in the main gas supply line.
  • the spring depresses diaphragm 44 and hence the plunger 43 to maintain the pressure switch (not shown) in the "off" position.
  • the pressure in the supply conduit 21 builds up to a level greater than the pressure within the combustion chamber itself. This produces a pressurp differential between conduits 46 and 47 with a result that the greater pressure 46 acts on the diaphragm to depress the diaphragm downwardly against the loading of spring 45 thereby moving plunger 43 downwardly to operate the pressure switch and thereby providing a gas supply to nozzle 26 (see Figure 1).
  • the apparatus operates in a manner described with respect to Figure 1.
  • FIGS. 3 and 4 show in perspective a prototype of the device and in practice it has been shown that the burner is quieter in operation and is fully modulating since the heat output of the burner can be varied by simply adjusting the fan speed to rate between certain limits.
  • the burner is also self-compensating for conditions within the combustion chamber by virtue of the zero governor described above.
  • the zero governor 40 is caused to operate to close the gas supply rendering the device safe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Regulation And Control Of Combustion (AREA)
EP81302443A 1980-06-04 1981-06-02 Gas burner and gas supply control depending on the pressure in the combustion chamber Withdrawn EP0047048A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8018306 1980-06-04
GB8018306 1980-06-04

Publications (1)

Publication Number Publication Date
EP0047048A1 true EP0047048A1 (en) 1982-03-10

Family

ID=10513826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81302443A Withdrawn EP0047048A1 (en) 1980-06-04 1981-06-02 Gas burner and gas supply control depending on the pressure in the combustion chamber

Country Status (6)

Country Link
EP (1) EP0047048A1 (enrdf_load_stackoverflow)
JP (1) JPS5726311A (enrdf_load_stackoverflow)
DK (1) DK243381A (enrdf_load_stackoverflow)
ES (1) ES8203486A1 (enrdf_load_stackoverflow)
GR (1) GR75684B (enrdf_load_stackoverflow)
PT (1) PT73138B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992001196A1 (en) * 1990-07-06 1992-01-23 Worgas Bruciatori S.R.L. Methods and apparatus for gas combustion
GB2356245A (en) * 1999-08-06 2001-05-16 Brian Stirk Fan unit for gas appliances
US20150159863A1 (en) * 2013-12-11 2015-06-11 Endegs Gmbh Burner Assembly and Method of Operating Same
CN105351931A (zh) * 2015-12-04 2016-02-24 深圳智慧能源技术有限公司 等径恒压管及引射式燃烧装置
WO2017092049A1 (zh) * 2015-12-04 2017-06-08 深圳智慧能源技术有限公司 等径恒压管及引射式燃烧装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445175A (en) * 1966-04-06 1969-05-20 Kurt Krieger Gas burners
GB1286356A (en) * 1970-01-13 1972-08-23 Raytheon Co Multiport high density gas burner
DE2832708A1 (de) * 1977-07-27 1979-02-15 Harry Alan Cheetham Gasbrenner
US4169430A (en) * 1976-08-12 1979-10-02 Cheetham Harry A Modular heat exchangers with a common flue
GB1578663A (en) * 1978-01-24 1980-11-05 Stelrad Group Ltd Boiler unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445175A (en) * 1966-04-06 1969-05-20 Kurt Krieger Gas burners
GB1286356A (en) * 1970-01-13 1972-08-23 Raytheon Co Multiport high density gas burner
US4169430A (en) * 1976-08-12 1979-10-02 Cheetham Harry A Modular heat exchangers with a common flue
DE2832708A1 (de) * 1977-07-27 1979-02-15 Harry Alan Cheetham Gasbrenner
GB1578663A (en) * 1978-01-24 1980-11-05 Stelrad Group Ltd Boiler unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992001196A1 (en) * 1990-07-06 1992-01-23 Worgas Bruciatori S.R.L. Methods and apparatus for gas combustion
US5385467A (en) * 1990-07-06 1995-01-31 Worgas Bruciatori S.R.L. Methods and apparatus for gas combustion
AU662485B2 (en) * 1990-07-06 1995-09-07 Worgas Bruciatori S.R.L. Methods and apparatus for gas combustion
GB2356245A (en) * 1999-08-06 2001-05-16 Brian Stirk Fan unit for gas appliances
US20150159863A1 (en) * 2013-12-11 2015-06-11 Endegs Gmbh Burner Assembly and Method of Operating Same
CN105351931A (zh) * 2015-12-04 2016-02-24 深圳智慧能源技术有限公司 等径恒压管及引射式燃烧装置
WO2017092049A1 (zh) * 2015-12-04 2017-06-08 深圳智慧能源技术有限公司 等径恒压管及引射式燃烧装置

Also Published As

Publication number Publication date
ES502759A0 (es) 1982-04-01
JPS5726311A (en) 1982-02-12
GR75684B (enrdf_load_stackoverflow) 1984-08-02
DK243381A (da) 1981-12-05
PT73138B (en) 1982-07-01
PT73138A (en) 1981-07-01
ES8203486A1 (es) 1982-04-01

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

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

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

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18D Application deemed to be withdrawn

Effective date: 19830221

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Inventor name: FELLS, ANTHONY CRISPIN