EP0206549A1 - Wärmestrahlungsgeber - Google Patents

Wärmestrahlungsgeber Download PDF

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Publication number
EP0206549A1
EP0206549A1 EP86304051A EP86304051A EP0206549A1 EP 0206549 A1 EP0206549 A1 EP 0206549A1 EP 86304051 A EP86304051 A EP 86304051A EP 86304051 A EP86304051 A EP 86304051A EP 0206549 A1 EP0206549 A1 EP 0206549A1
Authority
EP
European Patent Office
Prior art keywords
components
radiant heat
combustion
gas
slots
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Withdrawn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
EP86304051A
Other languages
English (en)
French (fr)
Inventor
Eric David Herbert
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.)
Morgan Refractories Ltd
Original Assignee
Morgan Refractories 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 Morgan Refractories Ltd filed Critical Morgan Refractories Ltd
Publication of EP0206549A1 publication Critical patent/EP0206549A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/24—Radiant bodies or panels for radiation heaters
    • 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
    • F23D14/12—Radiant burners
    • F23D14/126—Radiant burners cooperating with refractory wall surfaces

Definitions

  • the invention relates to radiant heat emitters or elements, particularly cylindrical elements.
  • the invention accordingly provides a ceramic radiant heat emitter for surface combustion of gas/air mixtures, in which a series of aligned slots extend within the body of the emitter and open at the combustion face to pass gas/air mixture from a distribution face of the body to the combustion face and secure combustion without striking back of flame into the body.
  • the construction is built up of spaced ceramic components in which the slots are formed by gaps between opposed faces of the components. Such components have the advantage that they may readily be made suitable to allow assembly of elements in any desired size from standard components. Separate or integral spacers may be used. Suitable dimensions of the slots are 0.2 to 0.4 to 1.2 or 1.3mm across, so flame cannot strike back.
  • the ceramic construction particularly when of bonded fibre, gives low heat conductivity.
  • the body is suitably a stack ofsuperposed, spaced rings, the slots extending from a gas/air distribution or plenum chamber to the combustion face and the rings being divided in a generally radial direction to avoid thermal stress in service.
  • the rings are divided completely into two or more similar parts, assembled on tie rods with the divisions staggered so that the dividions in a given ring are bridged by another ring and a body holding together as a unit is formed.
  • Similar constructions can be used for other shapes of elements, for example flat or shaped plates, with the components in spaced rows and gaps between thecomponents in a row bridged by the components in other rows.
  • Concave elements may be constructed, or cylindrical elements with combustion taking place on the inner face, the outer face being surrounded by a plenum serving to contain and distribute the gas/air mixture. Concave elements are useful for focusing radiant energy towards a particular plane, or if a part spherical element is constructed on similar principles, towards a particular spot.
  • Suitable materials include bonded refractory ceramic fibre which is well known in the art and both as such and in relation to the microstructure formed on casting and firing is described in detail in our U.K. Patent Specification No. 1 436 842 the disclosure of which is incorporated herein by reference.
  • the elements retain the high thermal shock resistance, low thermal conductivity and low thermal capacity referred to in that specification.
  • the elements may be mounted in metal or ceramic holders fed with gas and air by a jet and venturi in per se conventional way orif desired by gas/air premixed systems.
  • gas and air may be of any generally cylindrical shape, round or not, the term being indicative of the possibility of radiation of heat over an arc, whether substantially 360° or smaller if so required.
  • the body of the element is formed from cast half rings 1 clamped together by spring loaded screwed tie rods 2 passing through holes 3 and half holes 4 in the half rings.
  • the whole assembly is fed with gas in per se conventional manner by a jet 5 which induces air into a venturi 6 mounted on the same metal base plate as holds the burner element itself.
  • the base plate is referenced 7.
  • an end cap 8 closes the element, which is constructed by mounting the half rings so that the gaps between any two half rings are bridged by the next two half rings disposed at 90° to them, the whole being clamped together by the four tie rods with spacers 9 between the half rings determining the gas mixture passage dimensions.
  • spacers as shown are metal washers but refractory discs or integral spacers are also suitable.
  • the spacing of the half rings will depend on the gas being burned and to some extent the pressure at which it is being delivered to the inner chamber but for example may be 0.9mm in the axial direction, when natural gas (methane) and air is to be used under atmospheric inspiration.
  • the half rings are dimensioned so that only a very small gap is left between them where the two halves meet. As can be seen, the half rings are chamfered at 10, giving improved performance over a plain construction.
  • Figs. 3 to 6 show a concave element and its mounting, the base plate 7 of Fig. 2 being represented by a box 7' on which the assembled element is mounted by metal angles 11.
  • Figs. 5 and 6 show a cylindrical element where the combustion surface is the inner rather than the outer face, and the base plate 7 of Fig. 2 is represented by a mounting having a first distribution annulus 13 at the base feeding through a perforated plate 14 to a second distribution annulus 15 closed by a plate 16 which is a sliding fit within the annulus 15 to accommodate thermal movement.
  • Slot width in all elements is selected according to the gas/air mixture in use, so that the flow ensures that the flame does not propagate back.nor the heat front creep back through the material of the element.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP86304051A 1985-05-29 1986-05-28 Wärmestrahlungsgeber Withdrawn EP0206549A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8513544 1985-05-29
GB858513544A GB8513544D0 (en) 1985-05-29 1985-05-29 Gas burner element

Publications (1)

Publication Number Publication Date
EP0206549A1 true EP0206549A1 (de) 1986-12-30

Family

ID=10579850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86304051A Withdrawn EP0206549A1 (de) 1985-05-29 1986-05-28 Wärmestrahlungsgeber

Country Status (2)

Country Link
EP (1) EP0206549A1 (de)
GB (1) GB8513544D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224824A (en) * 1988-11-04 1990-05-16 Parkinson Cowan Appliances Ltd Gas burners
US5405261A (en) * 1992-12-15 1995-04-11 Free Heat, Inc. Waste oil fired heater with improved two-stage combustion chamber
US9266079B2 (en) 2012-06-20 2016-02-23 Uop Llc Apparatus for retaining solid material in a radial flow reactor and method of making
US9433909B2 (en) 2012-06-20 2016-09-06 Uop Llc Apparatus for retaining solid material in a radial flow reactor and method of making

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1978517A (en) * 1930-11-05 1934-10-30 Autogas Corp Gas burner
US2632503A (en) * 1948-04-27 1953-03-24 Standard Oil Dev Co Tubular radiant gas burner
FR2190249A5 (de) * 1972-06-22 1974-01-25 Utilisation Ration Gaz
US3881858A (en) * 1974-04-19 1975-05-06 Carl E Fitzgerald Radiant gas burner
GB1436842A (en) * 1972-06-08 1976-05-26 Tennant & Sons Warrington Ltd Radiant gas-fired burner
DE2917982B2 (de) * 1979-05-04 1981-05-27 Gaswärme-Institut e.V., 4300 Essen Wandstrahlbrenner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1978517A (en) * 1930-11-05 1934-10-30 Autogas Corp Gas burner
US2632503A (en) * 1948-04-27 1953-03-24 Standard Oil Dev Co Tubular radiant gas burner
GB1436842A (en) * 1972-06-08 1976-05-26 Tennant & Sons Warrington Ltd Radiant gas-fired burner
FR2190249A5 (de) * 1972-06-22 1974-01-25 Utilisation Ration Gaz
US3881858A (en) * 1974-04-19 1975-05-06 Carl E Fitzgerald Radiant gas burner
DE2917982B2 (de) * 1979-05-04 1981-05-27 Gaswärme-Institut e.V., 4300 Essen Wandstrahlbrenner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224824A (en) * 1988-11-04 1990-05-16 Parkinson Cowan Appliances Ltd Gas burners
US5405261A (en) * 1992-12-15 1995-04-11 Free Heat, Inc. Waste oil fired heater with improved two-stage combustion chamber
US9266079B2 (en) 2012-06-20 2016-02-23 Uop Llc Apparatus for retaining solid material in a radial flow reactor and method of making
US9433909B2 (en) 2012-06-20 2016-09-06 Uop Llc Apparatus for retaining solid material in a radial flow reactor and method of making

Also Published As

Publication number Publication date
GB8513544D0 (en) 1985-07-03

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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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Effective date: 19890627

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Inventor name: HERBERT, ERIC DAVID