EP0041528B1 - Doublage de chaudiere pour chaudieres au mazout ou au gaz - Google Patents

Doublage de chaudiere pour chaudieres au mazout ou au gaz Download PDF

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Publication number
EP0041528B1
EP0041528B1 EP81900007A EP81900007A EP0041528B1 EP 0041528 B1 EP0041528 B1 EP 0041528B1 EP 81900007 A EP81900007 A EP 81900007A EP 81900007 A EP81900007 A EP 81900007A EP 0041528 B1 EP0041528 B1 EP 0041528B1
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EP
European Patent Office
Prior art keywords
heat
boiler
plates
heating surfaces
name
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.)
Expired
Application number
EP81900007A
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German (de)
English (en)
Other versions
EP0041528A1 (fr
Inventor
Arne Pedersen
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0041528A1 publication Critical patent/EP0041528A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M3/00—Firebridges
    • F23M3/12—Firebridges characterised by shape or construction
    • F23M3/16—Firebridges characterised by shape or construction built-up in sections, e.g. using bars or blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M3/00—Firebridges
    • F23M3/22—Firebridges movable; adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel

Definitions

  • the invention relates to a boiler liner for oil-or gas-fired central heating boilers in which by means of heat resistant materials together with the heating surfaces of the boiler flow channels for the smoke gas are confined to promote good heat transition conditions.
  • a boiler liner of this kind is described in US-Patent specification 2,266,551 without, however, realizing that the arrangement of the bricks forming the heat resistant material is decisive for the thermal efficiency of the boiler.
  • the invention is characterized in that the material for confining the flame room as well as the material for the flow channels confined by the heating surfaces are highly insulating.
  • the highly insulating surface opposite the heating surface will closely follow the falling temperature of the gas flow in the flow direction so that in any point along the surface of the material there will be a local balance between convection and radiation which is not affected by the thermal conductivity of the brick material in the flow direction.
  • the use of highly insulated bricks in the whole liner is important by intermittent operation to obtain a desirable low heating capacity originating in the brick material, partly because the specfic gravity is low with a resulting low heating capacity, partly because the high insulation per se results in the fact that at most one third of the brick material will take part in the thermal exchange.
  • the liner can consist of a horizontal layer of plates, resting against the heating surfaces of the boiler chamber, and of vertical upright plates likewise resting against the heating surfaces.
  • the plates are positioned at an exact distance from the heating surfaces in a manner as to form slot openings the width of which shall be less than half the depth of the slots.
  • slot openings the width of which shall be less than half the depth of the slots.
  • Vermiculite produced by the Moler Works of Denmark, is a highly insulating material with low volumetric specific heat and resistant to heat loads of about 1200 degrees C.
  • a material of this character will besides improved combustion conditions and gas flow offer a hitherto unnoticed additional utilization of the supplied energy in thermostat-regulated boilers.
  • the material is easily cut through, whereby a precise and ideal slot opening is attainable for the individual boiler, and partly because the reflection from the burner chamber narrowed by the material will produce to a higher extent than known by the use of already known fireproof bricks an ideal temperature around the flame of from 950 to 1000 degrees C.
  • the temperature attained in the slots between the plates and the heating surfaces of the boiler is conditioned by the inlet temperature of the gases through the slots, as well as by the fall of temperature appearing during the passage of the gases through the slots.
  • a relative wide slot will thus procure excessive temperatures, whereas a relative narrow slot will result in temperatures unnecessarily far below the conversion temperature for S0 2 to S0 3 , and accordingly too slow rate of formation of sulphuric acid.
  • the highly insulating effect of the materials will bring about that the assimilated heat is stored at temperatures near to the flame temperature, and cause that the stored volume of heat will be quickly given off by radiation, as the surface of the Vermiculite plates will be cindered, and it will appear that the temperature will rise comparatively more due to the said radiation when the flame is extinguished.
  • an undesirable heat convection will fail to manifest in the boiler chamber, which by known flame limitations is strengthened by the presence of good heat conductors and/or heat absorbing bricks.
  • the returned radiation from the highly insulating material will provide that the interval between the sparks will be prolonged, which has been documented by laboratory research.
  • the aggregate effect of the boiler liner will result in efficiency effect of the supplied energy of up to 96 per cent.
  • the boiler liner according to the invention differs completely from known flame temperature regulation methods and socalled “smoke turning plates", in which materials are applied that produce the said heat convection in the boiler chamber after the extinguishing of the fire.
  • the invention relates furthermore to a procedure of mounting the boiler liner according to the invention in all types and sizes of boilers.
  • boilers There are mainly two existing categories of boilers viz. cast iron boilers with heating surfaces in corrugated profile, and plate iron boilers with smooth surfaces.
  • the boiler liner can be built up from the bottom of the boiler as a building set, as the longitudinal plates are adjusted to the depth of the boiler chamber, and the crosswise plates keep the longitudinal plates interlocked with the already mentioned precalculated precise slot opening at the heating surfaces. It is according to the invention advantageous that the material is suspended on metal angles, fastened to the rigging screws distended in the upper section of the boiler.
  • the bottoms of the profile will form natural openings for the desired slot openings, when the plates are resting against the profile.
  • Figures 1 and 2 show sections of oil-fired boilers, in the foremost wall of which the burner tube of the oil burner is situated.
  • a layer of plates 3 Above the burner tube and resting on a foundation of highly insulated plates 2 shaped according to the form of the boiler is placed a layer of plates 3, - resting in boilers with corrugated profile against the heating surfaces 5 of the boiler, by which are produced slot openings 4 between the plate material and the indentations of the heating surfaces.
  • Upright on this layer of plates 3 can be placed two plates 6 in boilers with corrugated profile, whereby linear hot air flow along the heating surfaces is provided.
  • the said plates 6 and loosely placed plates 7, covering the intervals between the plates, are kept in due position by the crosswise passing adaption plates 8.
  • the plates 3 of the layer to form slot opening to the heating surface 5 are provided with 2 cm deep grooves. These grooves will provide the desired slot opening 4, when the plates 3 are squeezed against the heating surfaces.
  • the plates 3 are kept in due position by the crosswise passing adaption plate 8.
  • the liner can, as shown in Figure 3, be suspended by means of rigging screws 10, distended horizontally from side wall to side wall in the upper section of the boiler chamber.
  • the rigging screws 10 are provided with open bends 11 of a special alloy of spring steel, and in the openings of which the angle bars 13 are suspended.
  • the four angle irons 13 form the basis of the mounting of the boiler liner according to same principles as specified with reference to Figure 1.
  • the horizontal bars of the angle irons 14 are coated with the same highly insulating material as that of which all the plates are made.
  • the combustion gases from the flame will attain an extremely high temperature in the circumference of the flame due to the counterradiation of the plates.
  • the combustion gases from the flame will attain an extremely high temperature in the circumference of the flame due to the counterradiation of the plates.
  • the combustion gases from the flame will attain an extremely high temperature in the circumference of the flame due to the counterradiation of the plates.
  • the built up and narrowed burner chamber will contribute to uphold the greater initial air velocity in the chamber, whereby the convection of the area concerned is improved, after which the heat flow at a temperature of between 400 and 500°C will continue through the slots between the plates 3 and the heating surfaces 5. Due to the socalled Coanda effect along the heating surfaces 5, the heat flow will remain in immediate contact with the heating surfaces up to the ceiling 15 of the boiler, after which the heat flow severely drained of heat energy will escape out through the flues of the the boiler into the chimney.
  • the plates 3 are dismantled and shortened, so as to form a free opening to the hind wall of the boiler 16.
  • the chimney temperature will thus be raised by about 10 degrees C for each t cm cut off the plates.

Abstract

Doublage de chaudiere destine a ameliorer la combustion, a reduire le degagement de fumee, et a procurer un flux thermique dans des chaudieres existantes de chauffage central au mazout ou au gaz, a l'aide duquel l'energie thermique d'alimentation est mieux utilisee, et a l'aide d'un materiau resistant a la chaleur (2, 3, 6, 7, 8) la chambre a flamme est confinee vers le haut en comparaison a une chambre plus grande de chaudieres existantes. On propose que les limitations des flammes soient determinees a partir d'un materiau hautement isolant. La capacite elevee d'isolation du materiau applique fera que la chaleur assimilee soit stockee a des temperatures presque egales a la temperature des flammes, ayant pour consequence de degager rapidement le volume stocke de chaleur par radiation apres extinction de la flamme. En meme temps, la convexion indesirable de chaleur dans la chambre de la chaudiere ne pourra se produire ce qui dans le cas de limitations connues des flammes, est intensifiee par la presence de bons conducteurs thermiques et/ou des briques d'absorption de chaleur La contre-radiation provenant des materiaux hautement isoles aura pour consequence de prolonger l'intervalle de temps entre les etincelles.

Claims (1)

  1. Doublage de chaudière pour chaudières de chauffage central a mazout ou à gaz par lequel, au moyen de matières réfractaires combinées avec des surfaces de chauffe de lachaudière, on limite les passages d'écoulement pour les gaz chauds afin de permettre de bonnes conditions de transfert thermique, charactérisé en ce que la matière pour le confinement de la chambre de combustion de même que la matière pour les passages d'écoulement limités par les surfaces de chauffe, sont hautement isolantes.
EP81900007A 1979-12-05 1980-12-02 Doublage de chaudiere pour chaudieres au mazout ou au gaz Expired EP0041528B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK516779 1979-12-05
DK5167/79 1979-12-12
DK249/80 1980-01-22
DK24980 1980-01-22

Publications (2)

Publication Number Publication Date
EP0041528A1 EP0041528A1 (fr) 1981-12-16
EP0041528B1 true EP0041528B1 (fr) 1984-04-25

Family

ID=26063609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81900007A Expired EP0041528B1 (fr) 1979-12-05 1980-12-02 Doublage de chaudiere pour chaudieres au mazout ou au gaz

Country Status (5)

Country Link
EP (1) EP0041528B1 (fr)
DE (1) DE3067657D1 (fr)
DK (1) DK157103C (fr)
NO (1) NO812649L (fr)
WO (1) WO1981001603A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK8682A (da) * 1982-01-12 1983-07-13 Ejnar Ingolf Hansen Varmelager-indsats til olie- eller gasfyr
CN116447595B (zh) * 2023-04-10 2023-12-19 广东合胜热能科技有限公司 一种移火板连接结构及运用该结构的浓淡燃烧控制方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE369434C (de) * 1923-02-19 Julius Subkus Einbau fuer Feuerungen
US2266551A (en) * 1939-02-17 1941-12-16 Sidney W Harvey Combustion efficiency device
DE830238C (de) * 1948-12-28 1952-02-04 Imbert G M B H Verfahren zum Beheizen von Heizkanaelen, insbesondere von Flammrohren, unter Verwendung von Einbaukoerpern
US2601167A (en) * 1948-12-30 1952-06-17 Stanley E Navarro Furnace and heat retaining unit therefor
US2540359A (en) * 1949-05-13 1951-02-06 Thomas J Torpy Furnace
US2791190A (en) * 1954-04-09 1957-05-07 Kolb Refractories Company Tripod baffle for furnaces
SE334207B (fr) * 1967-06-12 1971-04-19 Husqvarna Vapenfabriks Ab
FR1603973A (fr) * 1968-09-30 1971-06-21
US3548764A (en) * 1969-03-17 1970-12-22 John F Navarro Heat conserving,retaining and radiating assemblies for space heaters
DD107133A1 (fr) * 1973-07-05 1974-07-12
SE393447B (sv) * 1973-11-06 1977-05-09 S R Ljung Vermeackumulerande insats

Also Published As

Publication number Publication date
EP0041528A1 (fr) 1981-12-16
DK157103B (da) 1989-11-06
DK157103C (da) 1990-04-02
WO1981001603A1 (fr) 1981-06-11
DE3067657D1 (en) 1984-05-30
DK337981A (da) 1981-07-29
NO812649L (no) 1981-08-05

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