WO2013055287A1 - Refroidissement de dispositif d'alimentation de chambre de combustion - Google Patents

Refroidissement de dispositif d'alimentation de chambre de combustion Download PDF

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Publication number
WO2013055287A1
WO2013055287A1 PCT/SE2012/051094 SE2012051094W WO2013055287A1 WO 2013055287 A1 WO2013055287 A1 WO 2013055287A1 SE 2012051094 W SE2012051094 W SE 2012051094W WO 2013055287 A1 WO2013055287 A1 WO 2013055287A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
combustion chamber
gas
supply device
fluid
Prior art date
Application number
PCT/SE2012/051094
Other languages
English (en)
Inventor
Ulf HAGSTRÖM
Original Assignee
Ecomb Ab (Publ)
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 Ecomb Ab (Publ) filed Critical Ecomb Ab (Publ)
Priority to EP12839391.5A priority Critical patent/EP2766684A1/fr
Publication of WO2013055287A1 publication Critical patent/WO2013055287A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • 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 device and method for conserving heat in a combustion chamber.
  • heat generating plants such as boilers, incinerator furnaces and technically corresponding apparatuses are designed to combust or burn different kinds of fuels.
  • different kinds of hazardous gases and/ or particles may be formed or released.
  • the amount of these hazardous gases and/ or particles depends, among other things, on how well or completely the fuel is being combusted or burnt. This in turn depends on e.g. the temperature of the grate and the combustion chamber, the amount of available air and other substances that are present to be used by the combustion process and so on.
  • different kinds of supply devices for supplying fluid to an internal combustion chamber of a heat generating plant have been devised.
  • Said devices also simplify de-sooting and cleaning of the tubes included in the device, a feature which also enhances the yield of the combustion and vaporisation process respectively.
  • the devices also enable different fluids or solids to be supplied at different points of time, through one or more of said tubes, so that a new optimal operating point can be set in relation to the prevailing operating state of the combustion chamber.
  • a particular advantage afforded by the known supply devices is that one or more tubes can be withdrawn while still enabling the combustion or gasification process to continue with the use of the remaining tubes.
  • a supply device must be able to operate reliably over a long period of time in a demanding environment.
  • the tube that is inserted into the combustion chamber is subjected to high stresses as a result of the high temperature and the corrosive environment that prevail.
  • To reduce the wear of the material of the tube du to the exposure to high temperature it is cooled by means of cooling water circulating within the tube.
  • a method of conserving heat in a combustion chamber the combustion chamber being associated with a supply device comprising a tube and the supply device being arranged for supplying a fluid and/ or solid particles into the combustion chamber.
  • the combustion chamber is delimited by at least one chamber wall.
  • the method comprises providing the tube in the combustion chamber, the tube having a central longitudinal axis, a lateral surface, a first end with a first end surface, a second end, and at least one aperture through at least one of said surfaces.
  • the tube led by said first end, extends into the combustion chamber through a through hole in the wall of the combustion chamber.
  • the method also comprises supplying the fluid and/ or solid particles from a supply source outside of the combustion chamber to the tube via a supply line and a connector located at the second end of the tube and connected to the supply line.
  • the method further comprises emitting the fluid and/ or solid particles from the tube through the at least one aperture into the combustion chamber.
  • the method also comprises circulating a cooling liquid in the tube and in a coolant conduit loop outside of and connected to said tube for cooling the tube, whereby the cooling liquid is heated in the tube.
  • the method comprises cooling the heated cooling liquid with a gas flowing past the coolant conduit loop such that heat is exchanged from the coolant conduit loop to the gas, whereby the gas is heated.
  • the method comprises introducing at least some of the heated gas into said combustion chamber.
  • a supply device for supplying a fluid and/ or solid particles to a combustion chamber, said combustion chamber being delimited by at least one chamber wall.
  • the supply device comprises a tube, arranged in the combustion chamber, the tube having a central longitudinal axis, a lateral surface, a first end with a first end surface, a second end, and at least one aperture through at least one of said surfaces and arranged to emit fluid and/ or solid particles into the combustion chamber, said tube, led by said first end, extending into the combustion chamber through a through hole in the wall of the combustion chamber.
  • the tube also comprises a coolant duct for guiding circulating cooling liquid in the tube for cooling the tube.
  • the device further comprises a supply line connected to a supply source and to a connector of the tube, the supply line being arranged for supplying the fluid and/or solid particles from the supply source to the tube.
  • the device also comprises a coolant conduit loop arranged outside of the tube and connected to the tube such that the cooling liquid can circulate through the coolant duct and the coolant conduit loop.
  • the device comprises a fan arranged for providing a gas flow to pass the coolant conduit loop such that heat is exchanged from the coolant conduit loop to the gas, whereby the gas is heated and the coolant medium is cooled.
  • the device comprises a gas duct arranged for guiding at least some of the heated gas into the combustion chamber.
  • the heated gas By introducing at least some of the heated gas into the combustion chamber, heat energy removed from the combustion chamber by the cooling liquid used for cooling the supply device tube is returned to the combustion chamber, thereby conserving energy.
  • all of the heated gas is provided into the combustion chamber, allowing the supply device to be substantially energy neutral in respect of its thermal effect on the combustion chamber.
  • the gas may e.g. be secondary air or oxygen which the supply device is anyway intended to emit into the combustion chamber, which secondary air or oxygen may in accordance with the present invention be pre -heated before entering the combustion chamber.
  • other gases are also contemplated for the invention.
  • energy is recycled to the combustion chamber via an intermediary cooling medium, the cooling liquid, e.g. water.
  • water is a much more efficient cooling medium than e.g. air (Cp of 4.2 kj/kg, C, compared with 1.0 kj/kg, C).
  • Using a heated cooling liquid for pre-heating gas forwarded into the combustion chamber via liquid/gas heat exchanging may thus be an efficient way of conserving energy in the combustion chamber.
  • Fig 1 is a schematic perspective view, partly in cross-section, of a combustion chamber with an embodiment of a supply device of the present invention.
  • Fig 2 is a schematic side view, partially in—section, of a supply device according to an embodiment of the present invention wherein a tube of the supply device is shown in longitudinal section and inserted into a combustion chamber.
  • Fig 3 is a schematic side view of the inside of a wall of a combustion chamber, wherein the wall has an embodiment of a supply device of the present invention provided in a through hole of the wall.
  • Fig 4 is a schematic side view of the inside of a wall of a combustion chamber, wherein the wall has another embodiment of a supply device of the present invention provided in a through hole of the wall.
  • Fig 5 is a schematic perspective view, partly in cross-section, of a supply device according to another embodiment of the present invention wherein a tube of the supply device is shown inserted into a combustion chamber.
  • the term "tube” is intended to denote a hollow substantially cylindrical structure being delimited by a lateral surface and first and second end surfaces.
  • the lateral surface is substantially parallel to the central longitudinal axis of the tube, whereas the respective end surfaces are substantially not parallel to the central longitudinal axis of the tube but intersects the central longitudinal axis of the tube.
  • the tube has a first end with the first end surface, and a second end with the second end surface. Conveniently, the first and second ends do not include any of the lateral surface.
  • the first end When the tube is inserted into the combustion chamber, the first end may be regarded as an inner end since it extends, is inserted, into the combustion chamber, whereas the second end may be regarded as an outer end since it extends through an outer wall of the combustion chamber, such that the second end is in or outside said outer wall.
  • the apertures discussed herein are thus apertures through one of these surfaces.
  • the second end surface i.e. the surface of the second end of the tube, may, depending on the design of the tube, more or less substantially consist of an aperture.
  • the tube may be a substantially circular tube, i.e. have a substantially circular cross-section perpendicular to the central longitudinal axis, but other shapes are also contemplated, such as a square or rectangular tube.
  • That something is at the first or second end of the tube, such as the at least one aperture being at the first end of the tube or the displacing device meshing with or engaging the tube at its second end, implies that it is on/in the end surface or on/in the lateral surface but in close proximity of, or adjacent to, the end surface and at least closer to that (first or second) end surface than to the other (first or second) end surface of the tube.
  • That an aperture is arranged for emitting the fluid and/ or solid particles in a certain direction implies that a tube surface where the aperture is located, i.e. an extrapolated surface of how the surface would be had there not been an aperture there, is in a plane which is not parallel to the direction in which the aperture is arranged to emit the fluid and/or solid particles.
  • the plane of the aperture surface may be
  • the aperture may e.g. be equipped with a nozzle for better control of the emission of the fluid and/or solid particles.
  • the tube may be of any size, but it may be convenient to use a tube which has a longitudinal length of less than 10 m, such as less than 5 m, in order to reduce the lateral stress on the tube, especially if the tube is inserted substantially horizontally into the combustion chamber.
  • the diameter of the tube may also be of any size, but it may be convenient to use a tube with a diameter of less than 250 mm, such as less than
  • Only one tube may be used in a combustion chamber, but it may also be convenient to use a plurality of tubes, e.g. substantially parallel to each other, at different positions in the combustion chamber.
  • the tubes may then co-operate with each other to provide optimal supply of the fluid and/ or solid particles in the combustion chamber, e.g. improved mixture of the fluid and/ or solid particles with the atmosphere in the combustion chamber and/ or improved coverage of the combustion chamber volume by being able to supply the fluid and/ or solid particles at more different positions in the combustion chamber.
  • the tube may be inserted into the combustion chamber in any direction. It may be convenient to insert the tube vertically, e.g.
  • the tube may be convenient to insert the tube horizontally, e.g. through a side wall of the combustion chamber. Depending on the design on the combustion chamber, it may be easier to reach the place within the combustion chamber where it is desired to supply the fluid and/ or solid particles in the combustion chamber with a horizontal tube. A vertically inserted tube may need to be much longer and heavier in order to reach the same position in the combustion chamber as a substantially smaller horizontally inserted tube.
  • the apertures of the tube may be provided with nozzles adapted to be adjustable in different directions so as to emit fluid or solid particles in different directions.
  • the supply device may comprise a displacing device or means for displacing the tube, engaging the tube at its second end, for axially displacing the tube along its central longitudinal axis.
  • the displacing device may be arranged so as to also permit rotation of the tube around its central axis.
  • the tube of the supply device comprises a coolant duct for guiding circulating cooling liquid in the tube for cooling the tube while it is subjected to heat in the combustion chamber.
  • the coolant duct may extend along the whole longitudinal length of the tube such that the whole tube may be cooled.
  • the coolant duct may e.g. be configured such that cooling liquid is introduced into the tube through the second end surface of the tube or at least at the second end of the tube, i.e. the end outside of the combustion chamber, or at least close to the combustion chamber wall, when the tube is fully inserted into the combustion chamber.
  • the coolant duct may further be configured to guide the cooling liquid longitudinally along the length of the tube, e.g.
  • the coolant duct may further be configured to guide the cooling liquid longitudinally back towards the second end of the tube, possibly contacting the inside of the lateral surface of the tube e.g. in an annular longitudinal duct formed by the lateral surface of the tube and the lateral surface of a concentrically positioned inner tubular arrangement inside the tube, allowing the cooling liquid to exit the tube at the second end, e.g. through the second end surface.
  • the cooling liquid may be any suitable cooling liquid, e.g. water.
  • the coolant conduit loop is connected to the tube such that cooling liquid exiting the tube enters the coolant conduit loop, travels through the coolant conduit loop and then re-enters the tube from the coolant conduit loop.
  • the coolant conduit loop and the coolant duct of the tube may thus form an endless loop for circulating the cooling liquid.
  • the coolant conduit loop may at least partly be made from a heat conducting material in order to facilitate heat exchange through the material for cooling the cooling liquid.
  • the fan may be arranged for blowing the gas, such as air, oxygen and/ or recycled combustion gases, past the coolant conduit loop such that heat may travel from the cooling liquid in the coolant conduit loop to the gas.
  • the gas duct is arranged to guide heated gas into the combustion chamber.
  • the gas duct may e.g. be connected to the liquid/gas heat exchanger to guide the therein heated gas to the combustion chamber.
  • the heated gas may be introduced into the combustion chamber from the gas duct e.g. via the supply device or via other nozzles in the combustion chamber. At least some of the heated gas may e.g. be emitted into the combustion chamber as a fluid of the fluid and/ or solid particles emitted by the tube of the supply device through the aperture of said tube.
  • the heated gas may be introduced into the combustion chamber via slits, or other gas supply inlet, of the supply device in the through hole of the combustion chamber wall laterally or around the tube when it extends through said through hole.
  • slits may be connected to the gas duct and act as inlets of the heated gas from the gas duct into the combustion chamber.
  • the gas may e.g. be air or oxygen which is introduced into the combustion chamber as secondary air or oxygen for improved combustion of the combustion gases.
  • all of the heated gas is introduced into the combustion chamber.
  • At least a part of the gas which is used for cooling the liquid coolant is also regarded as the fluid and/ or solid particles to be emitted into the combustion chamber, i.e. no other fluid and/ or solid particles than the heated gas is emitted into the combustion chamber by the supply device.
  • the fan for the gas may also be regarded as the supply source of the fluid and/ or solid particles discussed herein and the gas duct may also be regarded as the supply line of the fluid and/ or solid particles discussed herein.
  • the fluid and/or solid particles may be combined with at least a part of the heated gas prior to being supplied into the tube.
  • FIG. 1 schematically shows an embodiment of a supply device 1 of the present invention, for optimizing flue gas parameters in a combustion plant 2.
  • the supply device 1 comprises a number of feeding apparatuses to the plant which are arranged for minimizing disturbances caused by depositions.
  • the combustion plant comprises a furnace for combustion of solid fuels with a grate 3 and an upper combustion chamber 4.
  • the fuel can be fed intermittently or continuously and combustion air in the form of primary air is blown from below and up through the grate 3.
  • Particles in the flue gas above the grate 3 comprises ash, slag and/ or un burnt fuel. These can together form bigger particles, so called agglomerates, or be reduced to smaller, more or less clean ash particles. Slag enriched fuels often give higher concentrations of dust and slag in the flue gas.
  • the walls of the combustion chamber may be equipped with wall pipes 6 with an external insulation 5.
  • the supply device 1 comprises tubes 13 having apertures or holes 14 for feeding secondary air into the combustion chamber 4 for improved combustion, as well as other desired additives such as ammonia and/ or urea solution for reducing the amount of NOx in the combustion gases or a sulphur containing compound, e.g. ammonium sulphate, for reducing the amount of corrosive chlorine compounds in the combustion gases.
  • the tubes 13 are inserted into the combustion chamber, they are subjected to high temperatures for prolonged time periods, which may wear on the material of the tubes 13.
  • the strain put on the tubes 13 material may be reduced an the useful life span of the tubes 13 may be significantly improved.
  • Poor mixing conditions in the combustion chamber 4 may render the combustion plant a lower combustion efficiency. This especially occurs when steps are taken to reduce NOx when concentrations of unburned gases/ particles are higher than before the adjustment. Throttling down air supply and/ or flue gas recirculation reduces the temperature in the combustion zone and, further, creates reducing conditions which lead to lower NOx concentrations and higher concentrations of unburned gases and particles. The demand for efficient admixing of secondary air becomes even more important.
  • the supply device tubes 13 for supplying a fluid and/ or solid particles, e.g. secondary air, to the combustion chamber 4 are arranged forming a curtain system comprising a number of substantially horizontal tubes 13, some of which are parallel to each other, at one or more vertical levels in the combustion chamber 4.
  • the tubes 13 are equipped with perforations/apertures 14 shaped as nozzles alongside the mantle/lateral surface of the entire tubes, e.g. in rows.
  • the outlet area of the apertures 14 determines the flow of the fluid at a given pressure.
  • the combustion gas flow over a cross section of the combustion chamber 4 may vary, whereby this may have to be compensated for when supplying/ emitting the fluids to the combustion chamber.
  • a fluid e.g. secondary air at high pressure
  • a fan 10 connected to a collecting box 11, to which flexible tubes 12 are connected, which with quick-couplings 23 are connected to the end of the tubes 13.
  • the tubes 13 may be inserted and withdrawn from the chamber 4 in an axial direction along the central longitudinal axis of the respective tube 13 at longer or shorter periods of time. In such a way the emission level of the combustion process can be maintained optimal.
  • the tubes 13 are displaceable in an axial direction from the combustion chamber 4 via through holes in its wall.
  • rollers 15 engage the mantle of the tubes 13. These rollers 15 are via a transmission 16 driven by a motor 17 and form a displacing device of the supply device 1.
  • Other types of displacing devices than the rollers 15 are also contemplated, e.g. a scissor lift engaging at the second end of the tube 13.
  • a frame 20 there is an arrangement of wire brushes 21, between which the tubes 13 pass when being withdrawn from and thereafter inserted into the combustion chamber 4. These brushes 21 perform an efficient cleaning of the tubes, so that they are released from dust and corrosive slag depositions.
  • an automatic shaking device striking tool or similar, not shown
  • acoustic soot blower infrasonics or ultrasonics
  • water or blown air or steam may be used.
  • the supply device 1 comprises a cooling system, which will now be discussed with reference to figure 2 which schematically illustrates an embodiment of a supply device 1 of the present invention.
  • Figure 2 shows a tube 13 of the supply device 1 of an embodiment of the present invention.
  • the tube 13 has a first end 51 with a first end surface 53, and a second end 52 with a second end surface 54, a lateral surface 55, and apertures 14.
  • the tube 13 extends, led by its first end, into the combustion chamber 4 through a through hole 56 of the wall 57 delimiting the combustion chamber.
  • a gas duct 12 is connected to the tube 13 via a connector 23 for supplying heated gas into the tube 13, which gas may then be emitted through at least one of the apertures 14, possibly in different directions, as shown by the arrows in figure 2.
  • the gas duct 12 is also connected to slits 58 of the supply device 1, which slits are positioned in the hole 56 of the wall 57, laterally of or around the tube 13.
  • the heated gas is secondary air.
  • a coolant conduit loop 59 is connected to the tube 13 via an inlet 60 arranged for allowing a cooling liquid to enter the coolant duct 63 of the tube 13 from the coolant conduit loop 59, and an outlet 61 arranged for allowing the cooling liquid to exit the coolant duct 63 of the tube 13 into the coolant conduit loop 59.
  • a pumping means may be used to circulate the cooling liquid in the coolant duct 63 and the coolant conduit loop 59.
  • the cooling liquid is water.
  • Both the gas duct 12 and the coolant conduit loop 59 passes, or form part of, a liquid/gas heat exchanger 62, such that heat is exchanged between cooling liquid travelling in the coolant conduit loop 59 and gas travelling in the gas duct 12, whereby the cooling liquid is cooled and the gas is heated.
  • a fan 10 is connected to the liquid/gas heat exchanger 62 for forming a gas flow through the gas duct 12 through the heat exchanger 62 and into the combustion chamber 4.
  • a supply source 64 of the supply device 1 contains a fluid and/ or solid particles to be emitted into the combustion chamber and is connected to a supply line 65.
  • the fluid and/or solid particles is a urea solution for reducing the amount of nitrogen oxides (NOx) in the combustion gases.
  • the supply line 65 is connected to the tube 13 via a connector 23, same or different from the connector 23 connected to the gas duct 12, such that the fluid and/ or solid particles can be supplied to the tube 13 from the supply source 64 via the supply line 65 and be emitted into the combustion chamber 4 through at least one of the apertures 14. If the fluid and/ or solid particles is emitted though an aperture 14 also emitting the heated gas, the heated gas may help carry the fluid and/ or solid particles into the combustion chamber and mix with the combustion gases therein.
  • Figures 3 and 4 schematically illustrates different embodiments of the supply device 1 as it is positioned in a through hole 56 of the wall 57 delimiting the combustion chamber 4 while the tube 13 is completely axially withdrawn from the combustion chamber 4 and the through hole 56.
  • the supply device 1 as inserted in the through hole 56 comprises a liner pipe 66 for allowing the tube 13 to axially slide in and out of the combustion chamber 4.
  • slits 58 are provided for emitting heated gas into the combustion chamber 4.
  • the slits 58 are connected to the gas duct 12 as discussed above.
  • Both the liner pipe 66 and the slits 58 are fitted in a concrete filling 67 in the through hole 56. Any wall pipes 5 of the wall 57 may be bent around the hole 56 so as not to prevent the insertion of the tube 13 or the introduction of the heated gas through the slits 58.
  • two slits 58 are used, one above the liner pipe 66 and one below the liner pipe 66.
  • any number of slits 58 may be used around the liner pipe 66, e.g. four slits 58: above, below, to the left and to the right of the liner pipe 66.
  • FIG. 5 is a schematic perspective view, partly in cross-section, of a supply device 1 according to another embodiment of the present invention wherein a tube 13 of the supply device 1 is shown inserted into a combustion chamber 4.
  • the figure is similar to figure 2 and the same reference numerals are used. Reference is made to the discussion regarding figure 2, above. Arrows are provided in figure 5 to indicate flow directions in the different conduits and into the combustion chamber.
  • a supply device or method for conserving heat in a combustion chamber having a supply device comprising a tube and being arranged for supplying a fluid into the combustion chamber, the method comprising: providing the tube in the combustion chamber, the tube having a lateral surface, a first end with a first end surface, and at least one aperture through at least one of said surfaces, said tube, led by said first end, extending into the combustion chamber through a through hole in a wall of the combustion chamber; circulating a cooling liquid in the tube and in a coolant conduit loop outside of and connected to said tube for cooling the tube; cooling the cooling liquid with a gas flowing past the coolant conduit loop such that heat is exchanged from the coolant conduit loop to the gas; and introducing at least some of the heated gas into said combustion chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)

Abstract

La présente invention concerne un dispositif et un procédé de conservation de chaleur dans une chambre de combustion dotée d'un dispositif d'alimentation comprenant un tube et étant conçu pour amener un fluide dans la chambre de combustion. Le procédé consiste : à monter le tube dans la chambre de combustion, le tube ayant une surface latérale, une première extrémité avec une première surface d'extrémité, et au moins une ouverture formée à travers au moins une de ces surfaces, ledit tube s'étendant par la première extrémité dans la chambre de combustion à travers un trou traversant ménagé dans une paroi de la chambre de combustion ; à faire circuler un liquide de refroidissement dans le tube et dans une boucle de conduit d'agent de refroidissement à l'extérieur du tube et reliée à ce tube pour le refroidissement de ce dernier ; à refroidir le liquide de refroidissement au moyen d'un gaz passant dans la boucle de conduit d'agent de refroidissement de façon que de la chaleur soit échangée entre la boucle de conduit d'agent de refroidissement et le gaz ; et à introduire le gaz chauffé dans ladite chambre de combustion.
PCT/SE2012/051094 2011-10-12 2012-10-11 Refroidissement de dispositif d'alimentation de chambre de combustion WO2013055287A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12839391.5A EP2766684A1 (fr) 2011-10-12 2012-10-11 Refroidissement de dispositif d'alimentation de chambre de combustion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1150945-2 2011-10-12
SE1150945 2011-10-12

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WO2013055287A1 true WO2013055287A1 (fr) 2013-04-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842834A (en) * 1987-02-02 1989-06-27 Fuel Tech, Inc. Process for reducing the concentration of pollutants in an effluent
US5342592A (en) * 1989-07-04 1994-08-30 Fuel Tech Europe Ltd. Lance-type injection apparatus for introducing chemical agents into flue gases
GB2375160A (en) * 2001-05-05 2002-11-06 Clyde Bergemann Ltd Furnace injection apparatus
EP1312862A2 (fr) * 2001-11-16 2003-05-21 Ecomb Ab Optimisation de combustion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842834A (en) * 1987-02-02 1989-06-27 Fuel Tech, Inc. Process for reducing the concentration of pollutants in an effluent
US5342592A (en) * 1989-07-04 1994-08-30 Fuel Tech Europe Ltd. Lance-type injection apparatus for introducing chemical agents into flue gases
GB2375160A (en) * 2001-05-05 2002-11-06 Clyde Bergemann Ltd Furnace injection apparatus
EP1312862A2 (fr) * 2001-11-16 2003-05-21 Ecomb Ab Optimisation de combustion

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Publication number Publication date
EP2766684A1 (fr) 2014-08-20

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