US3456934A - Burner projecting into a rotary kiln - Google Patents

Burner projecting into a rotary kiln Download PDF

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Publication number
US3456934A
US3456934A US618171A US3456934DA US3456934A US 3456934 A US3456934 A US 3456934A US 618171 A US618171 A US 618171A US 3456934D A US3456934D A US 3456934DA US 3456934 A US3456934 A US 3456934A
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US
United States
Prior art keywords
oxygen
burner
flame
charge
kiln
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
Application number
US618171A
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English (en)
Inventor
Herbert Ruch
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.)
Dolomitwerke GmbH
Original Assignee
Dolomitwerke GmbH
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 Dolomitwerke GmbH filed Critical Dolomitwerke GmbH
Application granted granted Critical
Publication of US3456934A publication Critical patent/US3456934A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • This invention relates to burners for rotary kilns employed in the production of burned or sintered refractories, where the burner projects from the discharge end of the kiln axially into the inner chamber and is fed with liquid, solid or gaseous fuel, and with oxygen or oxygenair mixtures.
  • a method is known where, in order to protect the lining, the oxygen is injected in the longitudinal direction of the kiln between the flame and the material to be burned. Thereby, the increased flame temperature results essentially in an increased temperature of the charge to be sintered without affecting excessively the opposite portion of the lining.
  • said method requires a high consumption of oxygen, and the free kiln lining adjacent the charge is still exposed to the increased flame temperature.
  • the oxygen is mixed with the flame so that, there, the energy of the flame is no longer concentrated on the charge.
  • This arrangement has the further advantage of utilizing the oxygen or oxygen-air mixture to impart optimum shape to the flame; the length and the temperature of the flame can be adapted to the requirements by adjusting the amount and velocity of the oxygen containing gases.
  • the convective heat transfer from flame to charge is improved by the radical speed component.
  • the cross-sectional areas of the outlet openings preferably decrease from the upper to the lower openings.
  • said arrangement provides for extension of the flame in the upper and upper middle area of the kiln chamber almost in direction of the kiln axis while in the lower middle and lower areas the flame is directed onto the charge.
  • a fan-shaped flame is produced which extends in the direction of the kiln axis in the plane of the normal to the charge.
  • each outlet opening with a separate admission line for the oxygen containing gas.
  • the form of the flame can be controlled very exactly by varying the gas pressure.
  • the amounts and velocities of the oxygen-containing gases will be adjusted so as to produce .a fan shape of the flame which is most favorable for the desired burning effect.
  • the burner of the invention can form a unit with the outlet nozzles for the oxygen; it is, of course, also possible to provide separate units for the feed of the fuel and that of the oxygen, the latter e.g. in form of a lance.
  • the cross-section of the fuel feed tube is in form of a horseshoe the inside of which receives the oxygen lance.
  • FIG. 1 is a sectional view of the discharge end of a rotary kiln with a burner according to the invention
  • FIG. 2 is a cross-section taken along line A-B of FIG. 1;
  • FIG. 3 is a front view of a two-part burner according to the invention.
  • FIG. 4 is a sectional view of an oxygen feed portion of a similar burner.
  • FIG. 5 is a front view taken in direction C-D of FIG. 4.
  • the numeral 2 designates the head of a rotary kiln 1 into which the burner 3 projects, which is provided at its lower part with inclined outlet openings 6 for oxygencontaining gas.
  • This arrangement ensures that the upper part 4 of the flame receives only little oxygen while the lower part 5 receives the major portion of the oxygen. This results in a flame which forms a fan directed against the charge 7 and whose lower portion 5 is much hotter than the upper portion 4.
  • This eflect can be further interisified by adjusting the feed of the oxygen-containing gas to the outlets so that the gas is the richer in oxygen the lower the gas outlet is.
  • FIG. 2 illustrates how the flame fan 5 can be expanded by providing turbulence producing inserts in the outlet openings.
  • FIG. 3 A two-part burner according to the invention is shown in FIG. 3.
  • the fuel admission encloses like a horse-shoe the oxygen feed line whereby the horse-shoe is opened towards the charge and where the outlet openings of the oxygen feed decrease in size downwardly.
  • FIGS. 4 and 5 show also in FIGS. 4 and 5, where the outlet openings 8, 9, 10 and 11 are from top to bottom, increasingly inclined towards the charge, While their crosssectional areas decrease in the same order.
  • oxygen includes also air enriched in oxygen.
  • a burner projecting into a rotary kiln for heating a charge to produce refractory material comprising separate members for the fuel and oxygen feed, said fuel feed member being formed in the shape of an inverted U and surrounding the oxygen feed member, said oxygen feed member, including at least one outlet inclined towards said charge.
  • a burner as claimed in claim 1 wherein said feed member for the oxygen includes a plurality of outlets disposed one above the other.
  • a burner as claimed in claim 2 wherein said outlets are disposed at varying angles of inclination, said angles of inclination increasing from the upper to the lower outlets.
  • a burner as claimed in claim 1 comprising means imparting turbulence to the oxygen leaving the oxygen outlets.
  • a burner as claimed in claim 2 including means for adjusting the amount and velocity of the oxygen feed so as to produce a fan-shaped flame extending in the direction of the kiln axis in a plane passing through said axis normal to the surface of the charge.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
US618171A 1966-02-24 1967-02-23 Burner projecting into a rotary kiln Expired - Lifetime US3456934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0049430 1966-02-24

Publications (1)

Publication Number Publication Date
US3456934A true US3456934A (en) 1969-07-22

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ID=7051891

Family Applications (1)

Application Number Title Priority Date Filing Date
US618171A Expired - Lifetime US3456934A (en) 1966-02-24 1967-02-23 Burner projecting into a rotary kiln

Country Status (3)

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US (1) US3456934A (zh)
AT (1) AT272924B (zh)
BE (1) BE692790A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150330956A1 (en) * 2014-05-16 2015-11-19 Waters Technologies Corporation Flame Ionization Detection Burner Assemblies for Use in Compressible Fluid-Based Chromatography Systems

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US797506A (en) * 1905-04-08 1905-08-15 Eldred Process Company Process of burning cement.
US2584808A (en) * 1947-03-26 1952-02-05 Allis Chalmers Mfg Co Method of and apparatus for nodulization of iron ore
US2654592A (en) * 1950-10-25 1953-10-06 Foamrock Corp Furnace
US3074707A (en) * 1960-04-15 1963-01-22 Union Carbide Corp Process for the manufacture of cement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US797506A (en) * 1905-04-08 1905-08-15 Eldred Process Company Process of burning cement.
US2584808A (en) * 1947-03-26 1952-02-05 Allis Chalmers Mfg Co Method of and apparatus for nodulization of iron ore
US2654592A (en) * 1950-10-25 1953-10-06 Foamrock Corp Furnace
US3074707A (en) * 1960-04-15 1963-01-22 Union Carbide Corp Process for the manufacture of cement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150330956A1 (en) * 2014-05-16 2015-11-19 Waters Technologies Corporation Flame Ionization Detection Burner Assemblies for Use in Compressible Fluid-Based Chromatography Systems
US10191020B2 (en) * 2014-05-16 2019-01-29 Waters Technologies Corporation Flame ionization detection burner assemblies for use in compressible fluid-based chromatography systems
US10877006B2 (en) 2014-05-16 2020-12-29 Waters Technologies Corporation Flame ionization detection burner assemblies for use in compressible fluid-based chromatography systems

Also Published As

Publication number Publication date
BE692790A (zh) 1967-07-03
DE1501808A1 (de) 1969-11-20
AT272924B (de) 1969-07-25
DE1501808B2 (de) 1975-11-27

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