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
  • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
  • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
• • 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, e.g. noise reduction means
  • F23D14/48—Nozzles
  • F23D14/56—Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
• • 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, e.g. noise reduction means
  • F23D14/48—Nozzles
  • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
  • F23D2900/14—Special features of gas burners
  • F23D2900/14642—Special features of gas burners with jet mixers with more than one gas injection nozzles or orifices for a single mixing tube
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E20/00—Combustion technologies with mitigation potential
  • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

• the invention relates to a gas burner nozzle for scarfing work, with a central, consisting of several tubes oxygen supply and with several arranged around said oxygen supply tubes for a fuel gas supply.
• Gas burner nozzles are used in Flämmtechnikn that are designed either as a machine or as Handflämmtechnik. Flamm, are required in particular for Brennputzen of slab surfaces. Thus, when cooling the slabs produced by casting on their surface often undesirable cracks, which are removed by a surface treatment. The same applies to burrs or beards, the processing of the slabs, z. B. caused by cutting. The used Flammbrenner be guided to eliminate the surface defects along the affected areas.
• EP 0 043 822 it is proposed in EP 0 043 822 to change the cross-section of the jet with regard to its shape and surface, independently of its power, during the combustion process by means of an oxygen jet of controllable power and orientation, which is surrounded by a heating flame.
• the burner designed for this purpose has an oxygen nozzle which is subdivided into several adjacent nozzles grouped as a compact bundle. This bundle of nozzles is surrounded by further nozzles, each forming a burner for heating, these nozzles and burners are provided with means for individual food with gas or oxygen or heating mixture. Each dining facility is individually adjustable.
• gas burners which have a plurality of coaxial tubes arranged for oxygen supply, which are surrounded by a plurality of tubes arranged around it for a supply of fuel gas.
• the tubes for oxygen supply are not arranged equidistantly or on rings which are the same distance from the center, but in groups, the individual groups being arranged coaxially and spaced apart from each other and each group consisting of at least two annularly arranged rows of tubes.
• three groups of oxygen supply tubes are provided.
• Each group may include 2 or 3 ring rows of oxygen delivery tubes.
• To the said tubes for supplying oxygen is provided on an outer ring, a group of nozzle openings each having a smaller diameter, through which the fuel gas is supplied.
• each tube for oxygen supply has an initial inner diameter of 6 to 12 mm, in particular 8 mm.
• the gas burner has separate oxygen supply lines, which are separately controllable.
• each separate gas supply is connected to a group of supply lines, i. H. connected to a ring area.
• individual tubes of a group preferably two to three tubes are combined into a subgroup, which in each case forms a one-piece body, which is arranged exchangeably in the gas burner nozzle.
• a subgroup which in each case forms a one-piece body, which is arranged exchangeably in the gas burner nozzle.
• the said groups of tubes are arranged according to a development of the invention in a single end piece, to which a pre-block is connected, which has three coaxially arranged pre-chambers for oxygen supply, which is respectively connected to the tubes of a (ring) group.
• the gas burner nozzle weight can be significantly minimized.
• the gas supply pipes are made of copper.
• each tube for oxygen supply is designed as a combination of a Laval nozzle with a cylinder tube directed towards the outlet.
• the Laval nozzle which is known in principle according to the prior art, has two cone-like regions, wherein seen in the flow direction of the first cone is tapered and the cone following it is widening. At the end of the extension area, a cylindrical pipe with a constant diameter is used up to the pipe exit.
• the diverging region can follow the first narrowing region of the inner cross section directly or with the interposition of a section of constant diameter. If a section with constant diameter If this is the case, the flow velocity is maintained in this area, without overlapping being desired in the diverging area and in the subsequent extension tube.
• the short section of constant diameter should be smaller than the respective lengths of the converging and diverging sections.
• 1 is a plan view of a gas burner nozzle
• Fig. 3a are each cross-sections through a tube for supplying oxygen with different to d lent gas flow structures.
• the gas burner nozzle for scarfing work shown in Fig. 1 has a central oxygen supply area with a plurality of tubes arranged in groups.
• the outer ring portion 11 is formed by individual tubes, wherein the tubes 111 are disposed on an outer ring, the tubes 112 on a next following ring and tubes 113 on an inner ring.
• the tubes 112 and 111 or 113 are each arranged offset to one another "on a gap.”
• the tube diameter is 8 mm, the tube spacing of the tubes 111, 112 and 113 of the adjacent tube each about 4 mm.
• Fig. 2 shows a variant in which only an outer front region is solid, which is followed by a pre-block, in which a central oxygen supply 16 to the tubes of the ring group 13, a coaxial thereto gas supply 17, to the tubes of the Ring group 12 leads, and an outer coaxial gas supply 18 are arranged, which leads to the group 11 of tubes.
• a central oxygen supply 16 to the tubes of the ring group 13 a coaxial thereto gas supply 17, to the tubes of the Ring group 12 leads, and an outer coaxial gas supply 18 are arranged, which leads to the group 11 of tubes.
• Each of the three gas supply lines 16, 17 and 18 can be regulated separately, so that the gas velocity in the individual tubes can be controlled accordingly.
• each individual tube for. B. 111, 112, 113, formed such that connects to a Laval nozzle 100 with the length L c, a cylinder tube 101 with a length L ⁇ .
• This Laval nozzle has a first converging region 121 extending over a length L 2 and a diverging region 122 having a length L 3 .
• a partial region with a length L 4 can be arranged which has a constant minimum diameter d m j n .
• the diameter of the cylinder tube 101 is denoted by dk and has the size of the largest diameter of the cone-shaped extension 122.
• the length L ⁇ or L 5 can be varied, for example between the lengths of 72 mm, 65 mm and 25 mm.
• the length L 2 can be selected, for example, 10 mm, the length L 4 with 2 mm and the L 3 with 25 mm.
• the gas flowing into the tube has a pressure Po of, for example, 1.3 ⁇ 10 6 Pa and a temperature T 0 (eg room temperature).
• T 0 eg room temperature
• the jet cone of the exiting oxygen stream can be varied to convergent, divergent or substantially parallel shapes.
• the differently occurring oscillation frequencies and oscillation amplitudes are varied via the input pressure P 0 .

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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)
• Pre-Mixing And Non-Premixing Gas Burner (AREA)
• Air Supply (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38529390

Family Applications (1)

Country Status (11)

Families Citing this family (5)

Family Cites Families (13)

• 2006
  • 2006-06-02 DE DE202006008760U patent/DE202006008760U1/de not_active Expired - Lifetime
• 2007
  • 2007-05-18 KR KR1020087029362A patent/KR20090023593A/ko not_active Application Discontinuation
  • 2007-05-18 US US12/303,124 patent/US20090186310A1/en not_active Abandoned
  • 2007-05-18 BR BRPI0711720-5A patent/BRPI0711720A2/pt not_active IP Right Cessation
  • 2007-05-18 EA EA200802264A patent/EA200802264A1/ru unknown
  • 2007-05-18 AU AU2007256799A patent/AU2007256799A1/en not_active Abandoned
  • 2007-05-18 CN CNA2007800205086A patent/CN101460781A/zh active Pending
  • 2007-05-18 MX MX2008015030A patent/MX2008015030A/es not_active Application Discontinuation
  • 2007-05-18 JP JP2009512407A patent/JP2009539055A/ja active Pending
  • 2007-05-18 EP EP07722450A patent/EP2024681A1/de not_active Withdrawn
  • 2007-05-18 WO PCT/DE2007/000902 patent/WO2007140740A1/de active Application Filing

Non-Patent Citations (1)

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