Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
  • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
  • F23D11/36—Details, e.g. burner cooling means, noise reduction means
  • F23D11/40—Mixing tubes or chambers; Burner heads
  • F23D11/404—Flame tubes
• • 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
  • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
  • F23M9/06—Baffles or deflectors for air or combustion products; Flame shields in fire-boxes

Definitions

• the present invention relates to a thermal reactor of a new type, intended to equip a flame burner, with a view to improving the combustion efficiency.
• a reactor can be used on the most demanding applications. more diverse. in particular to equip, in the home of a boiler, a burner supplied with a liquid fuel, such as fuel oil, or other petroleum hydrocarbons.
• the object of the present invention is to avoid these drawbacks.
• the invention aims to give it a structure suitably supporting operation under such severe conditions.
• the free end of the tubular cylindrical body tapers to end with an end opening whose cross section is less than the internal cross section of the tubular body;
• the internal central shield has the general shape of a hollow cone whose circular base is connected with a peripheral clearance to the wall of the tubular body, tanndis that the tip of the cone is directed towards downstream of the flame.
• the frustoconical central bcuclier has three tabs which protrude radially therefrom, to ensure its fixing by coming to snap into place in three corresponding openings provided in the wall of the tubular body.
• the free narrowed end of the tubular body is capped externally by an annular deflector which lugs, connected to the nose of the tubular body, maintain with peripheral play around the narrowed end of this tubular body.
• the annular end deflector comprises three tabs distributed around its periphery, which are fixed to the nose of the tubular body by welding or by screwing.
• the upstream end of the tubular body is equipped with a base made of insulating ceramic material.
• the base made of insulating ceramic material is simply fitted into the corresponding end of the tubular body of the reactor, and it is held in place by clamping between the tubular body and the burner nose.
• the insulating ceramic base has a general shape of revolution, with an annular groove with meridian section. dienne in an arc in the front face located around the base of the flame.
• the upstream end of the tubular body of the reactor includes a plurality of longitudinally oriented threaded rods ent rearwards and intended to come * bolting on the nose of the burner, after interposition of 'ceramic base between the tubular body and the burner.
• Figure 1 is a longitudinal sectional view of a thermal reactor according to the invention, mounted on the nose of a burner.
• Figure 2 is a meridian section of one ceramic base.
• Figure 3 is an exploded view of all the elements constituting the reactor.
• Figure 4 is a perspective view of the central shield.
• Figure 5 is a plan view.
• Figure 6 is a section along VI - VI ( Figure 5). There is shown in the drawings a burner
• This burner 1 of known type, which is intended to produce a combustion flame 2.
• This burner 1 has a base 2.
• a thermal reactor 3 is fitted thereto, which comprises a tubular body 4, made of refractory steel.
• This tubular body 4 is of generally cylindrical shape, its free end ending in a narrowed nose 5, opening onto the outside through an opening 6.
• the cross section of this opening 6 is less than the inside cross section of the body 4 in its cylindrical part.
• a transverse shield 7 is fixed, which is in the form of a hollow cone, the top 8 of which is oriented downstream of the flame 2.
• the circular base of the cone 7 is connects with a peripheral clearance 9 with the surrounding inner wall of the body 4. to achieve this fixing, provision is preferably made on the central shield 7, three radial tabs 10, intended to come to engage in openings not shown cut in the corresponding part of the wall of the body 4.
• a base 13 is clamped, which is in the form of a solid of revolution, made of insulating ceramic. Notches such as 14 are preferably provided laterally on the base 13 to allow the screws 11 to pass.
• the base 13 has a form of revolution, apart from the notches 14. On its front face, the base 13. has around its central bore 15, an annual groove 16 whose meridian section is substantially in an arc. This section is of interest for defining in the gas flow, a turbulence oriented in the direction of arrow 17.
• the downstream end of the body 4 is capped by an annular deflector 18, provided with three fixing lugs 19, distributed around its periphery. These tabs are intended to be fixed by welding or by bolting to the downstream end of the body 4.
• the fixing would be carried out by placing screws in the notches 20 of the lugs 19, these screws then passing through openings 21, provided for this purpose on the nose 5 of the body 4. the operation is as follows: The assembly being mounted on the burner nose 1, as indicated in FIG. 1, the flame 2 strikes the concave central part of the shield 7. It tends to return as indicated by the arrows 22, to flourish up to the periphery of the shield 7. It passes through the peripheral clearance 9 of this shield (arrow 23), while a part is returned to the bottom at the level of the groove 16 of the base 13.
• combustion gases are, for the most part, confined to the interior of the body 4, the metal of which is thus heated, to radiate all around it, in the infrared.
• the path followed by the different streams of combustion gases leads to complete combustion, without however observing appreciable heat losses.
• the red-heated body 4 which radiates in the infrared, to heat the surrounding hearth of the boiler.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)

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• 1985
  • 1985-07-18 WO PCT/FR1985/000198 patent/WO1987000605A1/fr unknown
  • 1985-07-18 EP EP19850903664 patent/EP0231167A1/de active Pending

Non-Patent Citations (1)

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