US3908603A - Boiler and elements therefor - Google Patents

Boiler and elements therefor Download PDF

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Publication number
US3908603A
US3908603A US481386A US48138674A US3908603A US 3908603 A US3908603 A US 3908603A US 481386 A US481386 A US 481386A US 48138674 A US48138674 A US 48138674A US 3908603 A US3908603 A US 3908603A
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United States
Prior art keywords
duct
boiler
sidewalls
elements
fire
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Expired - Lifetime
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US481386A
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English (en)
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Theodoor Gerardus Schiffelers
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BEONDU AG
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BEONDU AG
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    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/38—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water contained in separate elements, e.g. radiator-type element

Definitions

  • ABSTRACT Forelgn Apphcanon Pnonty Data A boiler element which, welded to similar elements, June 21, 1973 Netherlands 7308627 provides alternating fire ducts and water ducts sepa rated by single, relatively thindividing walls.
  • the lateral ridges of adjacent 122/225 8 elements are welded together to form a compact and undeformable peripheral wall for a water duct be- [56] References C'ted tween two dividing walls.
  • Boilers to which the present invention pertains are built up from elements which, in combination, provide an arrangement of alternating fire ducts and ducts for a heat transferring fluid, such as water, the respective ducts being separated by a single heat-transferring dividing wall.
  • a fast on-off response can be achieved when the dividing wall between the fire duct and the water duct is thin and made of light metal, which has a high heat exchange co-efficient. This also minimizes the weight of the boiler.
  • a thin wall of light metal for example, cast in aluminium, is generally insufficiently strong to withstand the relatively high water pressures. This could be remedied by minimizing the surface areas of the heat-transferring walls, but then this is in conflict with the requirement of efficient heat exchange and low flue gas temperatures.
  • each boiler element in a central heating boiler comprising boiler elements which in combination provide at least one fire duct and at least one water duct separated by a single dividing wall, each boiler element is cast in one piece in the form of a hollow flat box which, placed in upright position, has an open top and an open bottom each closable with a cover member, a narrow front wall, a narrow rear wall and broad sidewalls defining a fire duct between them, said sidewalls being provided on the inside with heat absorbing members extending from said side walls into said fire duct, and being shaped on the outside so that in two adjacent boiler elements joined in side-by-side relationship their facing side walls define a water duct between them which additionally is peripherally bounded by a narrow, non-deformable peripheral wall having an unbendable connection with the adjoining sidewalls.
  • the water ducts are very narrow, so that the requirement of a low water content is complied with, and the requirement of a compact design is met to a great extent.
  • the elements can be formed, for example, of aluminium even if their sidewalls are relatively thin, by virtue of the unbendable connection with the narrow peripheral wall, as a result of which deflection of the dividing walls under the influence of the water pressure is prevented by the virtually undeformable peripheral wall.
  • a narrow, undeformable peripheral wall for each water duct can be achieved in a structurally simple manner by providing each of the sidewalls of the boiler elements on the outside with a peripheral flange which in cross-section is approximately as high as broad, and which constitutes one half of a peripheral wall for a water duct, said flange having an unbendable connection with the associated sidewall of the boiler elements.
  • the peripheral flange has a bevelled or rounded base on its side facing the water duct.
  • the peripheral flange has a recessed top on its side away from the water duct, so that when two elements are joined there is provided a peripheral recess for receiving a run of weld metal.
  • Additional preferred features of the present invention are that, for additional reinforcement of the sidewalls of the boiler element, said side walls are each provided on the side of the water duct with substantially horizontal ribs defining a labyrinth passage for water, and on the side of the fire duct with undulated substantially vertically extending ribs which increase the heated surface area, while the two sidewalls of the element are interconnected by water passage tubes integral with the element.
  • FIG. 1 is a vertical sectional view, on the lines I I of FIG. 2, of two elements according to the invention, welded together in side-by-side relationship;
  • FIG. 2 is a side elevational view of the sub-assembly of FIG. 1 with a part being broken away and;
  • FIG. 3 is a top plan view of FIG. 2 with a part broken away.
  • each element defines a fireduct on the inside, and each sidewall is formed with substantially vertical, undulated ribs 4, extending from the sidewall into the fire duct and increasing the heated surface area.
  • Element 1 is formed on the outside with horizontal ribs 5 which in two joined elements link with one another to define a labyrinth passage for water or another heat transferring medium in a water duct. The water ducts are connected together by passages 6.
  • a boiler is equipped with at least two joined elements, covered at the end sidewalls with covers (not shown).
  • each element 1 is provided on the side of the water duct with a peripheral flange 7 which in cross-section is approximately as high as broad.
  • Peripheral flange 7 connects on the inside to the adjoining sidewall 2 via a bevel or rounding 8.
  • On the outside flange 7 is bevelled, such as by milling, for example at an angle of 45, so that when two elements are joined a groove is formed for receiving a run of welding metal 9.
  • the water duct located in between the elements is defined on opposite sides by flat sidewalls 2 and in the peripheral direction by a narrow peripheral wall constituted by two peripheral flanges 7.
  • sidewalls 2 can be made relatively thin.
  • Thin sidewalls 2 between a water duct and fire ducts ensure rapid response upon ignition and efficient exchange of heat, and additionally minimize the weight of the boiler.
  • a boiler composed of such elements, including flue and space for a burner is not more than 60 cm high. Its depth, determined by the size of the boiler elements and additionally by the room necessary for installing a boiler water thermostat, a gas control block and other appurtenances, need not be more than about 50 cm.
  • the width of the boiler, determined by the number of elements, is about 35 cm with a capacity of 32,000 Kcal/h. In this example the boiler can easily withstand gauge pressures of 4 ats; it is pressure-tested at a gauge pressure of 12 ats.
  • a boiler element which when connected to similar boiler elements provides a plurality of alternating fire ducts and water ducts separated by a single wall, characterized by said boiler element being cast in one piece in the form of a hollow flat box which, placed in upright position, has an open top and an open bottom; a narrow front wall, a narrow rear wall and broad sidewalls defining a fire duct between them; heat absorbing members extending from said sidewalls into said fire duct; and said sidewalls being of such configuration on the side away from said fire ducts that in two joined elements the opposing sidewalls define a water duct between them which in addition to said sidewalls is peripherally bounded by a narrow, non-deformable peripheral wall having an unbendable connection with the respective adjacent sidewalls.
  • a boiler element according to claim 1 wherein the sidewalls are each formed on the side away from the fire duct with a peripheral flange which in cross-section is approximately as high as broad, and which constitutes one half of aperipheral wall for a water duct, said flange having an unbendable connection with the associated sidewall of the element.
  • a boiler element according to claim 2 wherein said peripheral flange is bevelled on its side away from the water duct, so that when two elements are joined there is provided a peripheral recess for receiving a run of weld metal.
  • each sidewall is provided on the side away from the fire duct with substantially horizontal ribs defining a labyrinth passage for water, and on the side facing the fire duct with undulated, substantially vertically extending ribs increasing the surface area to be heated, and the two sidewalls of the element being interconnected by water passage tubes integral with the element.
  • a subassembly of boiler elements connected together to provide at least one water duct and at least one fire duct separated by a single wall, each of said boiler elements being cast in one piece in the form of a hollow flat box which, placed in upright position, has an open top and an open bottom each closable with a cover member, a narrow front wall, a narrow rear wall and broad sidewalls defining afire duct between them, said sidewalls being provided on the side facing said fire duct with heat absorbing members extending from saidsidewallsinto said first duct, and being shaped on the outside so that in two adjacent boiler elements joinedin side-by-side relationship their facing sidewalls define a water duct between them which additionally is peripherally bounded by a narrow, non-deformable peripheral wall having an unbendable connection with the adjoining sidewalls.
  • a subassembly of boiler elements welded together to provide at least one water duct and at least one fire duct separated by a single wall, each of said boiler elements being cast in one piece in the form of a hollow flat box which, placed in upright position, has an open top and an open bottom each closable with a cover member, a narrow front wall, a narrow rear wall and broad sidewalls defining a fire duct between them, said sidewalls being formed on the side facing said fire duct with heat absorbing projections extending into said fire duct, and on the side away from said fire duct with a pattern of projections which together with corresponding projections formed on the opposing side of an adjacent element provide a curved water passage in a water duct formed between said opposing sides of the adjacent elements and a narrow non-deformable peripheral wall formed by peripherally welding together opposing peripheral flanges integral with the respective elements and formed on the sides away from said fire duct.
  • a subassembly of boiler elements welded together to provide at least one water duct and at least one fire duct separated by a. single wall, each of said boiler elements beingcast in one piece in the form of a hollow, flat box which, placed in upright position, has an open top and an open bottom each closable with a cover member, a narrow front wall, a narrow rear wall and broad sidewalls defining a fire duct between them, said sidewalls being formed on the side facing said fire duct with undulated, substantially vertically extending ribs increasing the surface area to be heated, and on the side away from said fire duct with substantially horizontal ribs which together with correspondingribs formed on the opposing side of an adjacent element provide a curved water passage in a water duct formed between said opposing sides of the adjacent elements and a narrow, non-deformable, peripheral wall formed by peripherally welding together opposing peripheral flanges a run of weld metal for joining two elements together, the water

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Details Of Fluid Heaters (AREA)
US481386A 1973-06-21 1974-06-20 Boiler and elements therefor Expired - Lifetime US3908603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7308627.A NL158917B (nl) 1973-06-21 1973-06-21 Ketelelement.

Publications (1)

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US3908603A true US3908603A (en) 1975-09-30

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ID=19819121

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US481386A Expired - Lifetime US3908603A (en) 1973-06-21 1974-06-20 Boiler and elements therefor

Country Status (16)

Country Link
US (1) US3908603A (it)
JP (1) JPS5049750A (it)
AT (1) AT331459B (it)
BE (1) BE816619A (it)
CA (1) CA992817A (it)
CH (1) CH571690A5 (it)
DE (1) DE2429623A1 (it)
DK (1) DK331074A (it)
ES (1) ES427514A1 (it)
FR (1) FR2234530B3 (it)
GB (1) GB1428575A (it)
IT (1) IT1016152B (it)
NL (1) NL158917B (it)
NO (1) NO138298C (it)
SE (1) SE414823B (it)
ZA (1) ZA743889B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440113A (en) * 1980-12-24 1984-04-03 Kernforschungsanlage Julich Gmbh Connecting system for ceramic components of a burner and/or heating device
US20090050302A1 (en) * 2005-12-02 2009-02-26 Pierburg Gmbh Cooling device for an internal combustion engine
US20150020756A1 (en) * 2012-02-03 2015-01-22 Intergas Heating Assets B.V. Heating device
US20190011149A1 (en) * 2016-03-09 2019-01-10 Bekaert Combustion Technology B.V. Sectional heat exchanger for use in a heat cell
US10378755B1 (en) * 2016-12-05 2019-08-13 Jimmie P. Caradine Segmented watertube boiler system
US11391523B2 (en) * 2018-03-23 2022-07-19 Raytheon Technologies Corporation Asymmetric application of cooling features for a cast plate heat exchanger

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL171194C (nl) * 1978-05-23 1983-02-16 Giesen Metaalgieterij Warmwater-ketel, bijvoorbeeld een centrale verwarmingsketel.
DE3310343A1 (de) * 1982-08-18 1984-03-15 SBS Heizkesselwerk, 4402 Greven Niedertemperaturkessel mit zylindrischer feuerraumzarge
AT386676B (de) * 1985-07-10 1988-09-26 Pachernegg Johann Heizkessel
ATA291A (de) * 1991-01-02 1994-09-15 Vaillant Gmbh Atmosphärischer gliederkessel
JP2677092B2 (ja) * 1991-12-19 1997-11-17 凸版印刷株式会社 転写箔
DE102018105739A1 (de) * 2018-03-13 2019-09-19 Wolf Gmbh Brennwert-Wärmetauscher

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175540A (en) * 1961-12-13 1965-03-30 Slant Fin Radiator Corp Hot water boiler
US3366092A (en) * 1966-05-06 1968-01-30 Joseph M. Bove Heating boiler
US3589343A (en) * 1968-01-25 1971-06-29 Europ Riscaldamento Fer Boiler having tapered duct elements

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175540A (en) * 1961-12-13 1965-03-30 Slant Fin Radiator Corp Hot water boiler
US3366092A (en) * 1966-05-06 1968-01-30 Joseph M. Bove Heating boiler
US3589343A (en) * 1968-01-25 1971-06-29 Europ Riscaldamento Fer Boiler having tapered duct elements

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440113A (en) * 1980-12-24 1984-04-03 Kernforschungsanlage Julich Gmbh Connecting system for ceramic components of a burner and/or heating device
US20090050302A1 (en) * 2005-12-02 2009-02-26 Pierburg Gmbh Cooling device for an internal combustion engine
US20150020756A1 (en) * 2012-02-03 2015-01-22 Intergas Heating Assets B.V. Heating device
US20190011149A1 (en) * 2016-03-09 2019-01-10 Bekaert Combustion Technology B.V. Sectional heat exchanger for use in a heat cell
US10378755B1 (en) * 2016-12-05 2019-08-13 Jimmie P. Caradine Segmented watertube boiler system
US11391523B2 (en) * 2018-03-23 2022-07-19 Raytheon Technologies Corporation Asymmetric application of cooling features for a cast plate heat exchanger

Also Published As

Publication number Publication date
SE7408064L (it) 1974-12-23
CA992817A (en) 1976-07-13
DE2429623A1 (de) 1975-01-16
ES427514A1 (es) 1976-11-16
IT1016152B (it) 1977-05-30
ATA510974A (de) 1975-11-15
NL7308627A (it) 1974-12-24
NO742202L (it) 1975-01-20
NL158917B (nl) 1978-12-15
JPS5049750A (it) 1975-05-02
FR2234530A1 (it) 1975-01-17
NO138298C (no) 1978-08-09
FR2234530B3 (it) 1977-04-15
BE816619A (fr) 1974-12-20
CH571690A5 (it) 1976-01-15
DK331074A (it) 1975-02-10
AT331459B (de) 1976-08-25
ZA743889B (en) 1975-02-26
GB1428575A (en) 1976-03-17
SE414823B (sv) 1980-08-18
NO138298B (no) 1978-05-02

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