US3905753A - Compact burner for dryers - Google Patents

Compact burner for dryers Download PDF

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Publication number
US3905753A
US3905753A US391767A US39176773A US3905753A US 3905753 A US3905753 A US 3905753A US 391767 A US391767 A US 391767A US 39176773 A US39176773 A US 39176773A US 3905753 A US3905753 A US 3905753A
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United States
Prior art keywords
burner
fuel
combustion
outlets
gas
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 - Lifetime
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US391767A
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English (en)
Inventor
Hilmar Vits
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Individual
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Individual
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Filing date
Publication date
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Publication of US3905753A publication Critical patent/US3905753A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D99/00—Subject matter not provided for in other groups of this subclass
    • F23D99/002—Burners specially adapted for specific applications
    • F23D99/004—Burners specially adapted for specific applications for use in particular heating operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/007—Mixing tubes, air supply regulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2206/00—Burners for specific applications
    • F23D2206/0094—Gas burners adapted for use in illumination and heating

Definitions

  • a compact burner which is particularly suitable for dryers is disclosed.
  • the burner includes separate gasbumer and combustion-air chambers. At least two combustion-air outlets and at least one fuel gas outlet comprise an individual unit, the outlets being arranged so that the exiting fuel gas jet is mixed with the sequential air jets.
  • the present invention is concerned with a Compact burner. especially for dryers, having separate gasburner and combustion-air chambers, and a mixing area which is open in the direction of the burn-jet.
  • a plurality of outlets are distributed around the central burner axis into which the fuel-gas and combustion-air channels terminate, this axis being provided with an opening for a pilot-burner.
  • Compact burners to be utilized in dryers for continuously conveyed material such as, for example, paper are required to provide a high performance (several l00.000 kcal/h), to be quickly regulatable over a wide range, and to have a high ignition potential as well as a highly stable flame, so that opt imal bur' ni'ng of the fuel-gas/cornbustiomair mixture can takei plaee, without being affected by the turbulencewhich exists in the dryer,
  • the present inven tio n it is the purpose of the present inven tio n to provide a compact burner of the above mentioned type which, while of a simple construction, fulfills these requirements.
  • a burner is provided by the present invention, in which always at least two of the combustion-air outlets and always at least one of the fuel-gas outlets form one unit, with the further feature that the axes of the combustionair outlets of each unit cross each other in the mixing area, while the ax es of the fuel-gas outlet of the same unit are positioned in the mutual mirror plane of the axes of the two eombustion-air outlets in such a way that the exciting fuel-gas jet mixes with the sequential combustion-airjets, j i
  • the combustion-air jets meet each other diagonally and mix'turbu lently in the area of the mutual mirror plane with the fuel-gas jet. This causes an intensive mixing of the fuel-gases with the combustion-air in the immediate proximity of the outlets of smaller as well as larger burner operations. without danger that the flame will lash back or become turbulent. A switch-over from the smallest burner operation to the maximum burner performance is possible within only fractions of a second, without the possibility that thereby unburned fuel gases will flow into the dryer and thereby form an explosive mixture. Since the combustion-air jets meet sequentially, their flow-current components discontinue in tangential direction, so that the fuel-gas/cornbustion-air mixture exits from the mixing area without drift compo nents and burns with a larger, thinner flame.
  • one unit of combustionair outlets has two fuel-gas outlets which are arranged at both sides of the plane spanned by the axes of the combustion-air outlets.
  • the lateral l'uelgas jets communicate with the outer planes of the air-jets which are pointed towards each other.
  • a preferred arrangement of the combustion-air out lets and the fuel gas outlets, so far as construction is concerned, is that in which the combustion-air outlets are provided in the inclined sides of wedge-shaped hollow bodies, each hollow body having an apex which extends radially to the burner axis.
  • the apexes of the hollow bodies are suitably inclined towards the burner 2 axis and counter to the direction of the jet of the burner.
  • the hollow bodies may be arranged as attachment pieces on a plate, thus closing off the rear side of the mixing area.
  • the fuelgas outlets may be provided in the plate.
  • the combustion-air supply can be obtained in a simple manner whereby the areas of the hollow bodies are in communication with a combustion-air chamber which surrounds the mixing area by means of openings in the wall of the mixing area.
  • a simple fuel-gas supply to the fueLgas outlets can be realized in that a fuel-gas chamber is provided below the plate, whereby the fuel-gas outlets are in communication with the fuelgas chamber.
  • a bore hole in the center of the plate serving as an opening for the pilot burner.
  • FIG 4 shows a cross-sectional view of the compact burner of FIG. 1, taken along Linc III-III of FIG. 3.
  • the compact burner of the present invention is, in general, of symmetrical construction of heat-resistant material, provided with a cylindrical mixing space 1 which is closed off at one end by means of a plate 2.
  • Four wedge-shaped hollow bodies 3, 4, 5, 6 are arranged so as to surround the central axis of the compact burner on the side of the plate 2 which faces the mixing space I.
  • each hollow body 3 4, 5, 6 there are provided one each of the larger combustion-air outlets I2, 13 and two smaller combustion-air outlets I4, 15, 16,17 laterally adjacent the larger outlet 12 and somewhat lower than the larger outlet l2.-Two radially positioned fuelgas outlets 18, l) are provided in the plate 2 between each two adja cent hollow bodies 3, 4, 5, 6.
  • the combustionair outlets 12, 13, I4, l5, l6, 17 which are provided in the sides facing each other, of two adjacent hollow bodies. for example, 3, 4, together with the intermediary fuelgas outlets l8, 19, form one unit.
  • the oppositely positioned combustion air outlets l2, l3, l4, l5, l6, l7 of each adjacent hollow bodies 3, 4. 5. 6 are arranged so as to be mirror-symmetrical to an axial plane, always located between the adjacent hollow bodies 3, 4, 5, 6 and passing through the central axis 7.
  • the axes of each of the opposite combustion air outlets 12, 13, 14, I5, 16, 17 cross in the mixing space of the mirror-plane.
  • combustion-air chamber 22 which surrounds the mixing space 1, by means of an opening 20, 21 in the wall of the mixing space 1.
  • the combustion air chamber 22 is provided with an air-intake 23.
  • a fuel-gas chamber 24 having a gas intake 30 is provided below the plate 2.
  • the fuel-gas chamber 24 is connected with the fuel-gas outlets l8, 19.
  • a bore hole 26 is provided in the center of the plate 2 for receiving a pilot burner 29, indicated by a dotted lineJA tubeshaped area 27, for mixing the fuel-gases with the air, is surrounded by a pipe 28 which leads through the fuel-gas chamber, and is tightly connected to the outside of plate 2.
  • the burner of the present invention burns within a widely adjustable range with a very stable flame. Flash-backs of the flame are not possible since the mixing of air with the fuel-gas takes place in the mixing space.
  • An additional feature of the present invention is found in the fact that, under conditions of strong turbulence, the flame will remain stable because of the intensive mixing of the fuel-gas with the combustion-air having taken place already inside the mixing space. This intensive mixing also permits the sudden switching of the burner from a maximum performance to the lowest required performance and vice versa.
  • the burner flame is comparatively thin and long since the mixing of the fuel-gas with the combustion-airis made without pro-.
  • a compact burner for dryers having divided fuelgas and combustion-air channels, a flame-jet and a mixing space which is open in the direction of the flamejet.
  • the fuel-gas and combustion-air channels communieating with the mixing space by means of a plurality of outlets which are arranged around the central axis of the burner, and an opening in the burner for a pilotburner.
  • the combustion-air outlets and at least one of the fuel-gas outlets comprising one unit, the axes of the combustion-air outlets of each unit crossing each other in the mixing space and the axis of the fuel-gas outlet of the same unit lying in the mutual mirror-plane of the axes of the two combustion-air outlets in such a way that the exiting fuel-gas jet mixes with the sequential air jets, the combustion-air outlets being located in the inclined sides of wedge-shaped hollow bodies whose apexes run radially to the burner-axis, and the fuel-gasoutlets beingarranged in the troughs which are formed bytwo adjacent hollow bodies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
US391767A 1972-08-26 1973-08-27 Compact burner for dryers Expired - Lifetime US3905753A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2242037A DE2242037C2 (de) 1972-08-26 1972-08-26 Rohrförmiger Gasbrenner, insbesondere für Trockner

Publications (1)

Publication Number Publication Date
US3905753A true US3905753A (en) 1975-09-16

Family

ID=5854617

Family Applications (1)

Application Number Title Priority Date Filing Date
US391767A Expired - Lifetime US3905753A (en) 1972-08-26 1973-08-27 Compact burner for dryers

Country Status (2)

Country Link
US (1) US3905753A (OSRAM)
DE (1) DE2242037C2 (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100119984A1 (en) * 2008-11-10 2010-05-13 Fox Allen G Abatement system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164200A (en) * 1962-06-27 1965-01-05 Zink Co John Multiple fuel burner
US3545903A (en) * 1969-03-12 1970-12-08 United States Steel Corp Burner for preheating a refractory lined vessel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164200A (en) * 1962-06-27 1965-01-05 Zink Co John Multiple fuel burner
US3545903A (en) * 1969-03-12 1970-12-08 United States Steel Corp Burner for preheating a refractory lined vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100119984A1 (en) * 2008-11-10 2010-05-13 Fox Allen G Abatement system

Also Published As

Publication number Publication date
DE2242037C2 (de) 1974-10-31
DE2242037A1 (OSRAM) 1974-04-04
DE2242037B1 (de) 1974-04-04

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