Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/02—Spray pistols; Apparatus for discharge
  • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
  • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
  • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
  • B05B7/0475—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber with means for deflecting the peripheral gas flow towards the central liquid flow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/02—Spray pistols; Apparatus for discharge
  • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D1/00—Burners for combustion of pulverulent fuel
  • F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
• • 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
  • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
  • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
  • F23D11/105—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet at least one of the fluids being submitted to a swirling motion

Definitions

• This present invention relates to a method and apparatus, particularly, but not exclusively, for burning crude oil on oil exploration and production platforms.
• the invention relates to an oil burner for burning crude oil obtained from well testing operations.
• the invention also relates to a burner for burning other carbonaceous fossil fuels in liquid or particulate form, such as coal dust.
• An object of the present invention is to provide improved combustion apparatus and a method of combustion which obviates or mitigates at least one of the disadvantages associated with existing combustion apparatus.
• combustion apparatus in the form of a burner head in which oil is passed through a conduit without a restriction orifice.
• a plurality of apertures each of which are inclined towards the conduit outlet and which pass through the conduit such that they are substantially tangential to the surface of the conduit, and surrounding the conduit in the vicinity of the inclined apertures in an annulus and air of high velocity is passed through the annulus and through the inclined apertures into the interior of the conduit to mix with the oil.
• the air breaks up the oil into particles and provides the particles with angular velocity causing them to rotate or swirl in one direction. This swirling mixture stays in the flame which gets hotter as more particles are consumed so that the combustion is improved.
• combustion apparatus comprising a conduit for receiving a flowable carbonaceous fossil fuel to be combusted, the conduit having a bore, an inlet, an outlet and a longitudinal axis, a housing surrounding the said conduit and defining a space between an interior surface of the housing and an exterior surface of the conduit, the conduit having a plurality of apertures therein connecting the bore of the conduit with the space, said apertures being angled or inclined to the longitudinal axis of the conduit and directed towards the conduit outlet and being disposed such that the nozzles having an outlet in the bore substantially tangential to the interior surface of the conduit, said housing being adapted to be coupled to a gaseous supply so that, in use, when the fuel flows through the conduit towards an outlet, a high pressure gas is forced around said space and through said inclined apertures to produce a swirling mixture of fuel particles for combustion at the outlet of said conduit.
• said set of apertures are disposed in a - A - plane substantially perpendicular to the longitudinal axis of the conduit.
• said apertures are arranged in a spiral around the conduit.
• the fuel is oil such as crude oil.
• the fuel is coal dust.
• combustion apparatus for mixing a flowable carbonaceous fossil fuel with a gaseous propellant
• a burner head having a conduit for receiving a supply of fuel to be burned, said conduit having no restriction orifice, an inlet, an outlet, a bore and a longitudinal axis, said conduit also having a plurality of nozzles disposed near the conduit outlet for permitting passage of a high velocity gaseous propellant into the bore of the conduit for mixing with fuel therein, a housing surrounding said conduit and defining a space with the outer surface of said conduit for directing said high velocity gaseous propellant around the outer surface of said conduit, a gaseous propellant inlet conduit coupled to said housing for allowing gaseous propellant to be fed into said housing, said nozzles in said conduit extending through the conduit to connect the space between the housing and the conduit space with the bore of said fuel conduit, said nozzles being inclined to the longitudinal axis of said fuel conduit in the direction of flow and being arranged such that each nozzle passes through the
• a method of burning a flowable carbonaceous fossil fuel in a fuel burner comprising the steps of, passing fuel to be burned along a conduit without a flow restricting orifice, said conduit having an inlet, an outlet, a bore and a longitudinal axis, passing a gaseous propellant through a plurality of nozzles into the bore of the conduit near the conduit outlet, the nozzles in the bore being inclined to said longitudinal axis of the conduit and passing through the bore such that each nozzle exits in the bore at a location substantially tangential to the interior surface of the conduit, mixing the gaseous propellant with the fuel in said conduit so that said gaseous propellant breaks the fuel up into particles having an angular velocity resulting in the particles swirling or rotating in a mist about the longitudinal axis of the conduit in one direction at the outlet of the conduit igniting the mixture at the conduit outlet.
• Fig. 1 is a cross-sectional view taken through an oil burner head in accordance with an embodiment of the present invention
• Fig. 2 is a cross-section view taken on the line 2-2 of Fig. 1;
• Fig. 3 is an end view of the burner taken in the direction of arrow A shown in Fig. 1 along the lines 3-3;
• Fig. 4 is a perspective and partly broken away view of the conduit of Figs. 1, 2 and 3 without the housing, and
• Fig. 5 is a conduit for use with the burner with an alternative arrangement of nozzles to those in Figs. 1 to 4.
• Fig. 1 of the drawings depicts a burner head generally indicated by reference numeral 10 for burning crude oil either on-shore of off-shore. It will be appreciated that a single or a plurality of such burner heads can be used but a single burner head will be described in the interests of clarity.
• the burner head 10 consists of a steel cylindrical conduit 12 which has an inlet 14 for coupling to a source of well-oil (not shown in the interests of clarity) and a burner outlet 16 where the oil fed to the burner is ignited by a pilot light (not shown) and burned off as will be later described in detail.
• a cylindrical housing generally indicated by reference numeral 18 is disposed around the exterior of the tubular conduit 12 and is in sealing engagement therewith by virtue of O-ring seals 20 and 22.
• the housing 18 is held in place by split-ring 19 and collar 21 which is connected to the housing 18 by threaded coupling 23.
• the housing wall 24 defines, with the exterior wall 25 of the tubular conduit 12 an annular chamber generally indicated by the reference numeral 26.
• a plurality of angled nozzles 28 are disposed in the wall of the cylindrical conduit 12 to provide communication between the annular chamber 26 and the bore 30 of the conduit. In the embodiment shown there are 24 nozzles arranged in 3 groups of 8 spaced 45° apart around the circumference of the conduit 12 as best seen in Figs. 2, 3 and 4 although in Fig. 1 only 6 such nozzles are shown.
• Each nozzle 28 is a drilled hole 4 " in diameter and is angled at about 45° to the bore axis and the direction of flow of the oil and, as best seen in Figs. 3 and 4, the nozzles are arranged so that they pass through the conduit 12 non-radially with the apertures exiting in the bore 30 substantially at a tangent to the internal bore surface 31. This orientation of the apertures facilitates passage of high velocity air from the annular chamber 26 to the bore of the cylindrical conduit 30 to facilitate combustion as will be later described in detail.
• the housing 18 is coupled to an air inlet manifold 32 which, in turn, has an inlet 34 which is coupled to a supply of high velocity air (not shown in the interests of clarity) .
• the inlet manifold 32 may be coupled to the housing 18 by means of a threaded connection or snap release coupling or any other suitable means for connecting coupling units.
• nozzles 28 are spaced evenly around the periphery of the conduit 12 to facilitate air flowing evenly into the conduit for thorough and even mixing of the oil for burning.
• oil is passed to the burner head 10 and is passed through the bore 30 of the conduit 12.
• the oil is mixed with high velocity air which passes through the manifold 32 around the annulus 26 and through the nozzles 28 where it mixes with the oil to provide a swirling vortex-like oil/air mixture in the form of a mist in one direction as best seen by the arrows in Figs. 3 and 4.
• the swirling mixture mist provides efficient mixing such that the mixture, once ignited, stays in the flame longer, becomes hotter and provides thorough and efficient combustion of the crude oil so that there is virtually no visible emissions obtained.
• This device provides results far superior to existing burner heads and it will be appreciated that the plurality of such burner heads can be combined to provide a composite burner head to handle larger flows of crude oil.
• the group of nozzles have the advantage that they produce a swirling oil/air mixture mist which is very thorough and efficient with the result that the mixture stays in the flame longer so that the temperature of the flame increases. This in time, results in complete and efficient combustion of the crude oil to such an extent that virtually all sooty or black smoke emissions are avoided as the crude oil is completely combusted.
• any number of nozzles can be disposed in the burner head sufficient to provide a sufficient flow of air to ensure proper mixing and achieve a necessary swirling vortex-like effect.
• the nozzle size and angle is not critical and may be varied from that shown in the drawing. However, the nozzle size and angle should still be sufficient to permit air to mix with the oil as before described and ensure a swirling mixture.
• the nozzles can be arranged in groups in planes perpendicular to the longitudinal axis or can be arranged in a continuous or discontinuous spiral on the conduit as shown in Fig. 5 to facilitate creation of a spiral swirling mixture mist.
• gaseous propellants other than air, for example, steam or hydrocarbons, may be used as long as it achieves the necessary mixing with the oil to facilitate combustion as aforedescribed.
• nozzles 28 do not have to enter bore 50 at an exact tangent to the surface; they should enter at a sufficient angle so that, in use, when the high velocity gaseous propellant passes through the nozzles then a swirling mixture mist of oil particles, coal dust is created as shown in Fig. 4.
• the burner can cope with higher water cut crude and heavy crudes.
• the fuel can also be particulate flowable fossil fuel such as coal dust which can be mixed with the high velocity gaseous propellant to create a swirling mist of coal dust particles for combustion at the burner.
• the principle advantage of the present invention is that combustion of the crude oil is achieved without producing sooty black smoke; the burning is very efficient and there are virtually no visible emissions resulting from the combustion resulting in less immediate environmental impact. There is no need to throttle the oil flow to the burner so that the risk of blockage even with crude oil with a high solid content or with particulate fuel such as coal dust is minimised.
• Another advantage offered by this system is the reduction of back pressure created by the orifices used in conventional burners, thus enabling wells to be tested without restriction. This means that the well-test system operating pressure can be reduced which has a safety advantage in that the risk of hydrocarbon back-flow into the atomising air system is decreased.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Spray-Type Burners (AREA)
• Regulation And Control Of Combustion (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Nozzles For Spraying Of Liquid Fuel (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=10722823

Family Applications (1)

Country Status (8)

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Family Cites Families (5)

• 1992
  • 1992-10-01 GB GB929220710A patent/GB9220710D0/en active Pending
• 1993
  • 1993-05-28 BR BR9307165A patent/BR9307165A/pt not_active IP Right Cessation
  • 1993-05-28 WO PCT/GB1993/001128 patent/WO1994008178A1/en not_active Application Discontinuation
  • 1993-05-28 CA CA002145073A patent/CA2145073C/en not_active Expired - Fee Related
  • 1993-05-28 UA UA95038285A patent/UA44229C2/uk unknown
  • 1993-05-28 EP EP93913235A patent/EP0663053A1/de not_active Withdrawn
  • 1993-05-28 AU AU43369/93A patent/AU680417B2/en not_active Ceased
• 1995
  • 1995-03-31 NO NO951259A patent/NO307582B1/no not_active IP Right Cessation

Non-Patent Citations (1)

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