EP0387859B1 - Chaudière de chauffage - Google Patents

Chaudière de chauffage Download PDF

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Publication number
EP0387859B1
EP0387859B1 EP90104852A EP90104852A EP0387859B1 EP 0387859 B1 EP0387859 B1 EP 0387859B1 EP 90104852 A EP90104852 A EP 90104852A EP 90104852 A EP90104852 A EP 90104852A EP 0387859 B1 EP0387859 B1 EP 0387859B1
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EP
European Patent Office
Prior art keywords
flue gas
chamber
combustion chamber
area
flame
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
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EP90104852A
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German (de)
English (en)
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EP0387859A2 (fr
EP0387859A3 (fr
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PYROPAC AG
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Pyropac AG
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Publication date
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Publication of EP0387859A2 publication Critical patent/EP0387859A2/fr
Publication of EP0387859A3 publication Critical patent/EP0387859A3/fr
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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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/282—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with flue gas passages built-up by coaxial water mantles
    • 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
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/09062—Tube-shaped baffles confining the flame

Definitions

  • the invention relates to a boiler with internal exhaust gas recirculation for the combustion of liquid or gaseous fuels with a burner arranged at the end, the flame of which is directed into a combustion chamber insert (7) which is open in the flow direction and which is surrounded by a water chamber (8) and downstream in a deflection space (4) opens, which is connected to a flue gas collecting space (19) via a flue gas duct formation (15), which, viewed from the deflection space (4), over a first section (16) of the duct length between the outer wall of the combustion chamber insert ( 7) and the inner wall (10) of a second area (9) of the water space (8) and then through an intermediate space (18) over a second section (17) of the channel length in multiple form through a first area (11) or on the outside thereof
  • the first area (11) of the water space (8) extends, from which intermediate space (18) a partial flue gas stream is branched off (40), which is fed to the combustion chamber (3) over the circumferential area of the burner tube (2) due
  • the main proportion of nitrogen oxides in furnaces is especially when using nitrogen-free or low-fuel fuels, such as gaseous fuels and heating oil EL, on thermal NO, which at temperatures above 1200 ° C in the flame by oxidation of the molecular nitrogen N2 carried by the air with which oxygen is created. It is known in principle to reduce the formation of thermal NO in particular by returning a partial exhaust gas flow to the combustion process.
  • nitrogen-free or low-fuel fuels such as gaseous fuels and heating oil EL
  • the exhaust gas has a relatively large specific heat capacity due to its content of carbon dioxide and water vapor.
  • An exhaust gas recirculation can basically be imagined in two ways, namely the external exhaust gas recirculation, i.e. the exhaust gas is removed somewhere outside the boiler on the way to the fireplace or the like and fed to the combustion process, for example by introducing it into the combustion air of a burner fan, on the other hand you can imagine recirculating part of the exhaust gas in the burner chamber itself so that the exhaust gas is returned to the flame root.
  • the external exhaust gas recirculation i.e. the exhaust gas is removed somewhere outside the boiler on the way to the fireplace or the like and fed to the combustion process, for example by introducing it into the combustion air of a burner fan, on the other hand you can imagine recirculating part of the exhaust gas in the burner chamber itself so that the exhaust gas is returned to the flame root.
  • the combustion chamber is limited in terms of its longitudinal extent to the first section of the flue gas duct formation, and the second section of which runs in the form of several individual trains radially outward of the first section and at the same axial height as this through the water space Reversal of the direction of flow in a flue gas collecting space, which is arranged on the end of the boiler facing away from the burner.
  • the partial flue gas stream branched off in the intermediate area between the sections reaches the exit area on the periphery of the burner tube along a short path along the end wall insulated from the combustion chamber.
  • the invention is intended to provide a boiler of this type, in which the part of the flue gas branched off from the end of the heat exchanger section between the flue gas duct formation and the water space is more comprehensive, i.e. is not only exploited by adding it to the flame.
  • the design of the boiler according to the invention means that the combustion chamber surrounded by the combustion chamber insert is designed to be comparatively longer and, in terms of its function, is adapted to different temperature conditions.
  • a hot burnout zone is defined in the area of the first section of the flue gas duct formation, and a more cooled zone is defined in the region of the flare formation, in which the corresponding combustion chamber insert area is surrounded by the partial flue gas flow, the duct cross section of which can be kept smaller in accordance with the partial quantity of the flue gas, which results in a relatively dense one Distance of the inner wall of the second area of the water space leads from the outer surface of the fireplace insert in this area.
  • a flue gas recirculation is carried out within the boiler, that is to say "inside the boiler".
  • the basic idea is that the fuel mixture flowing out of the combustion tube, which is ignited to the flame, passes into the combustion chamber at a certain speed and therefore generates a vacuum in the area in front of the mouth of the combustion tube (this is also referred to as the flame pulse, i.e. the directed one Size from the product of the mass and velocity of the gas in the direction from the nozzle orifice).
  • the exhaust gas passing out of the combustion chamber into the heat exchanger region located outside this gives off heat and suffers flow resistance losses, so that a pressure drop occurs.
  • the partial exhaust gas quantity that is recycled can basically take place anywhere in the area of the heat exchanger path outside the combustion chamber up to and including the collecting space connected to the chimney is. It is important in any case that a reliable pressure drop from the place where the partial exhaust gas is extracted to the negative pressure area in the area of origin of the flame is ensured.
  • the invention is preferably applied to a boiler which is particularly designed to have a low exhaust gas temperature at the exhaust gas outlet space, in which case there is a large area in the last area of the heat emission to the adjacent water jacket to be heated.
  • the exhaust gas is preferably tapped off before this last area-intensive heat transfer path, the exhaust gas there, for example, still has a temperature of approximately 400 ° C., ie is significantly cooler than the hot gases in the combustion area, which are responsible for the NO x formation.
  • the preferably tubular combustion chamber insert which surrounds the combustion chamber, is extended upwards towards the burner nozzle, in such a way that that the mouth of the burner tube engages in the interior (combustion chamber) enclosed by the combustion chamber insert.
  • the partial exhaust gas quantity to be supplied must be able to flow into the interior of the combustion chamber insert forming the combustion chamber, ie the combustion chamber insert is not subsequently pulled up to the cover, but instead held more or less spaced from it.
  • the mouth of the burner tube can at most be arranged in the opening plane of the combustion chamber defined thereby, but preferably it engages in the combustion chamber space encompassed by the combustion chamber insert.
  • a targeted gap is created between the combustion chamber insert and the inner wall of the water jacket holding it in the transition area from the first heat exchanger section to the one with the large heat exchanger surface of the final flow section of the exhaust gases.
  • this is done by means of a protruding rib, which is continuous or interrupted all around, on which the tubular combustion chamber insert is supported on the inner wall of the boiler via more or less rod-shaped or regionally small supporting projections.
  • the size of the gap formation in this support area provides a setting option for the order of magnitude of the partial flow of the tapped flue gas; the distance between the upper edge of the tubular combustion chamber insert and the cover, which is penetrated by the burner head, offers a further possibility for adjusting the flow resistance and thus the recirculated part of the flue gas.
  • the flue gas enters the combustion chamber in the negative pressure area, mixes with the flame and thereby reduces the temperature in this flame area accordingly due to the returned cool flue gas.
  • This "cooling" is due to the increased relative heat capacity of the partial flue gas.
  • Another effect is that the temperature peaks in the combustion area are reduced thereby, ie the temperature within the flame, which can be very different with regard to their distribution without such a measure, is evened out. In such temperature peak areas, the NO x formation would be favored accordingly. By reducing these peaks due to the high temperature differences to the flue gas temperature, these educational zones are restricted accordingly.
  • the "two-stage" design of the water chamber is designed as a one-piece casting, for example gray cast iron, so that the condensate formation which occurs in particular in the case of flue gases which have cooled down well can be mastered without problems.
  • the casting Due to the absorption of silicate, the casting forms a very corrosion-resistant casting skin, which is much more resistant to condensate than steel. The prerequisite for this, however, is that the cast skin remains uninjured. Cast skin injuries occur due to machining and also due to friction.
  • the wall of the water chamber is in a preferred embodiment one piece continuously and at least in the delimitation area of the flue gas duct unprocessed.
  • the water chamber preferably consists of a one-piece casting.
  • the lower front end of the boiler is formed by a floor insulating body that limits the deflection space downwards.
  • the heat exchanger surfaces of the water jacket preferably run at least essentially vertically in the area of the flue gas duct or ducts, so that condensate forming in the upper low-temperature region can flow downwards in the direction of higher flue gas temperature and thus evaporate.
  • Detailed explanations can be found in DE-OS 35 46 368.6-16.
  • the water chamber can be designed in the upper region of the flue gas duct in such a way that the flue gas duct surrounds it radially on the outside or through it.
  • an inner wall of the water chamber to be heated is therefore close to the preferably tubular combustion chamber insert. This means that cooling directed towards the upper area (flame formation area) of the combustion chamber takes place, which in particular has an influence on the recirculated marginal gas partial quantity if it is diverted upwards in this area between the inner wall of the water chamber and the combustion chamber insert.
  • the flue gas recirculation which is preferably provided here for a boiler with an internal water chamber in the upper region is fundamentally not limited to such a boiler design. It is only necessary to be able to split off the subsets of the to provide flue gas supplied to the flame. In the most primitive case, these could also be slots or bores which are provided in the upper annular area between the flue gas collection chamber with connection to the chimney and the burner head area. Instead of a hole, a continuous gap can also be provided between the upper edge of the inner vessel wall and the cover.
  • the preferred branching of the recirculated partial flow region of the exhaust gas from the transition region between the lower and the upper flue gas duct section can have the advantage that this recirculated exhaust gas quantity has not cooled down too far.
  • the combustion chamber 3 has a first zone arranged in connection with the upper end-side boundary of the combustion chamber 3, in which the flame forms and which is therefore called the flame formation zone 5 here.
  • This zone 5 is followed by a further zone, viewed downwards, over the rest of the combustion chamber 3, in which the flame burns out and is therefore referred to as the flame burnout zone 6.
  • the combustion chamber 3 and thus the flame formation zone 5 and the flame burnout zone 6 are delimited by a wall of a combustion chamber insert 7 which is designed as a steel tube.
  • the water space designated overall by 8 is divided into two water space areas, namely a first area 11 and a second area 9, which are connected to one another by a multi-part transition area 14 stand.
  • the second area 9, with its inner wall 10, forms a hollow cylindrical space at a distance from the combustion chamber insert 7 in the area of zone 6, while the first area 11 with its inner jacket wall 12 surrounds the fire area insert 7 in the area of zone 5.
  • a total of 15 designated flue gas duct extends from the lower deflection chamber 4 outside the combustion chamber 3 to a flue gas collecting space 19 formed in the upper end area of the boiler, which is connected via an outlet 20 to a chimney, not shown.
  • the flue gas duct 15 viewed in this flue gas flow direction, has a first section 16, which extends in the hollow cylindrical space between the combustion chamber insert 7 and the inner wall 10 of the second water space region 9, and propagates in a second section 17, which is here through a A plurality of through cavities 35 is formed, which are evenly distributed over the circumference and arranged in parallel so that they pass through the first water space region 11 at a distance from the inner wall 12 thereof.
  • the two sections 16 and 17 of the flue gas duct 15 are connected to one another via a flue gas space 18, as can be seen in FIG. 1.
  • the deflection space 4 is closed at the bottom by a floor insulating body 21, which is arranged on the second water space region 9, which is designed as a casting.
  • the upper end wall of the boiler 1 is formed by a cover 23, which has insulation toward the inside of the boiler and extends over the entire end face of the boiler.
  • the lid 23 can be opened or removed in a manner not shown, so that a through the opening Cleaning of the combustion chamber and the flue gas duct sections is made possible.
  • the two water space regions 9 and 11 are connected to one another by means of the transition region 14 which is interrupted in the circumferential direction from the flue gas transitions to the passage cavities 35.
  • the water introduced into the second water space region 9 via a water inlet 24 thus passes into the first water space region 11 and from there passes again via a water outlet 25 to the outside of the boiler.
  • the flame formation takes place in the first zone 5 of the combustion chamber 3, as seen from the burner 2, and releases great heat.
  • This zone 5 a relatively small radial distance is left between the combustion chamber insert 7 and the water-cooled inner wall 12 of the first water chamber region 11, so that heat is dissipated, thereby making an amount to reduce the formation of NOx.
  • the flame enters zone 6 of the combustion chamber, which is relatively hot due to the radially adjacent, larger-sized and the hot flue gas-absorbing first section 16 of the smoke duct 15, so that the flame burns out well, as a result of which pollutants such as carbon monoxide are formed , Hydrocarbons and soot is significantly reduced.
  • the flue gas passes through sections 16 and 17 of the flue gas channel and the multi-part flue gas intermediate space connecting them, whereby in the first section a large part of the heat of the flue gas passes through the inner wall 10, which is provided with ribs 28, to the water in the Water area 9 is released. Radiant heat prevails in the area of the flue gas space 18 a temperature from the upper area of zone 6 which prevents the accumulation of condensate. Thereafter, the flue gas is cooled via the flow path along the outer wall 13 of the first water area 11 and thus leaves the boiler via the flue gas collection space 19 and the outlet 20 with only a little heat.
  • the first water chamber region 11 has the task of cooling the surroundings of the zone 5 and the flue gas in the section 17 of the flue gas duct. In this way, a compact construction is achieved with a good burnout of the flame.
  • the walls encompassing the entire water space 8, ie including the transitions in the area of the flue gas duct 15 from its first section 16 to its second section 17 in the form of a plurality of parallel through-channels 35 as well as a receptacle formation for the floor insulating body 21 and one Partial enclosure of the flue gas duct 19 is formed as a one-piece casting, in particular a gray casting. It is therefore not necessary to machine the gray cast iron surfaces in the area of the flue gas duct, especially in the area that tends to form condensate. As can be seen in FIG.
  • ribs 28 projecting radially inwards are formed on the inner wall 10 of the second water space region 9, which serve to increase the heat exchanger surface in the first section 16 of the flue gas duct 15.
  • the size of the heat transfer surface in the area of the second section 17 of the flue gas duct 15 can be influenced by the number and / or shape of the through ducts 35.
  • the hollow cylindrical space 40 between the outer wall of the combustion chamber insert 7 in the area of the flame formation zone 5 and the inner wall 12 of the first water space area 11 is used as a channel for the conduction of a part of the flue gas branched off from the flue gas intermediate space 18 to the space between the cover 23 and the upper end edge of the firebox insert 7 passed.
  • the upper end edge of the combustion chamber insert 7 is spaced a distance 39 from the inner wall of the cover 23, so that the part of the flue gas can enter the upper end side of the combustion chamber insert 7 according to the arrow shown on the left, specifically over the area of the surface 41 something protrudes into the space encompassed by the tubular furnace insert 7. Due to the exit velocity of the fuels or fuel mixtures flowing out of the burner tube 2 and leading to the formation of a flame, a negative pressure is generated which draws in the branched-off part of the flue gas and feeds it to the flame in the formation area.
  • a rib 42 running through or interrupted in the circumferential direction is formed, protruding radially inward from the wall 12, on which projections 43 are supported, which are formed in the circumferential direction on the outer wall of the combustion chamber insert 7, for example welded on.
  • the dimensions are such that between the rib 42 and the projections 43 a more or less subdivided, but otherwise with respect to the overall cross-section to be dimensioned gap 44, which determines the amount of the branched flue gas part.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fire-Extinguishing Compositions (AREA)

Claims (10)

  1. Chaudière à recirculation interne de fumée pour la combustion de combustibles liquides ou gazeux, avec un brûleur disposé frontalement dont la flamme est dirigée dans un insert de chambre de combustion (7) dans le sens d'écoulement, qui est entouré d'une jaquette d'eau (8) et débouche en aval dans une chambre de déviation (4) en relation avec une chambre de collecte de fumée (19) par une formation de canal de fumée (15) qui, vue de la chambre de déviation (14), s'étend par une première partie (16) de longueur de canal entre la paroi externe de l'insert de chambre de combustion (7) et la paroi interne (10) d'un deuxième domaine (9) de jaquette d'eau (8), et ensuite dans une chambre intermédiaire (18) par une deuxième partie (17) de longueur de canal à forme multiple par un premier domaine (11) ou à l'extérieur de ce premier domaine (11) de jaquette (8) de la chambre intermédiaire (18) duquel est dérivé un courait partiel de fumée (40) qui est injecté dans la chambre de combustion (3) par la périphérie du tube de brûleur (2) en raison de l'effet d'injecteur des combustibles ou mélanges de combustibles débouchant du tube de brûleur (2) pour former la flamme,
       caractérisée en ce que les parties (16-18) de formation de canal de fumée (15) et ainsi les domaines (9, 11) de la jaquette d'eau (8) sont disposés successivement dans l'axe de l'insert de chambre de combustion (7) de forme allongée appropriée vue de la chambre de déviation (4) vers la chambre de collecte de fumée (19) disposée dans le domaine frontal de l'insert de chambre de combustion (7), et en ce que le courant partiel de gaz dévié de la chambre intermédiaire (18) entre la première et la deuxième partie (16, 17) de la formation de canal de fumée (15) passe par une chambre annulaire (40) entre la paroi interne (12) du premier domaine (11) de la jaquette d'eau (8) et la paroi externe de l'insert de chambre de combustion (7), l'intervalle radial entre l'insert de chambre de combustion (7) et la paroi interne refroidie à l'eau (12) du premier domaine de jaquette d'eau (11) étant plus petit que l'intervalle correspondant du deuxième domaine de jaquette (9)
  2. Chaudière selon la revendication 1, caractérisée en ce qu'on utilise un brûleur à chute avec formation de flamme dirigée du haut vers le bas.
  3. Chaudière selon la revendication 1, 2, caractérisée en ce que l'insert de chambre de combustion (7) forme du côté du début de flamme, à une distance (39) de 20 à 50 mm et de préférence 30 mm de la paroi interne du couvercle de chaudière (23), une surface (41) délimitée entre le couvercle (23) et la chambre de combustion (3), surface par laquelle on recycle un courant partiel de fumée dans la flamme.
  4. Chaudière selon la revendication 1, 2 ou 3, caractérisée en ce que l'insert de chambre de combustion (7) forme, à une distance de 10 à 30 mm et de préférence 15 mm de la paroi interne (12), un premier domaine de jaquette d'eau (11) entourant la zone de formation de flamme de la chambre de combustion (3), un canal (40) creux cylindrique se trouvant entre une chambre de collecte (18) intermédiaire de fumée et le domaine de transition tourné vers le tube de brûleur (2) du courant partiel de fumée dans la zone de formation de flamme (5) de la chambre de combustion (3).
  5. Chaudière selon l'une des revendications 1 à 4, caractérisée en ce qu'on forme une ailette (42) qui s'étend de manière continue ou discontinue en périphérie, dirigée radialement vers l'intérieur dans le sens de l'écoulement de la fumée sur la paroi interne (11) du premier domaine de jaquette d'eau (12), ailette sur laquelle s'appuie l'insert de chambre de combustion (7) par plusieurs rebords (43) qui s'en détachent radialement.
  6. Chaudière selon l'une des revendications 1 à 5, caractérisée en ce que l'insert de chambre de combustion (7) est formé dans le domaine de la chambre de collecte de fumée (19) avec un jeu (39) vis-à-vis du couvercle de chaudière (23).
  7. Chaudière selon l'une des revendications 1 à 6, caractérisée en ce que l'insert (7) de chambre de combustion est formé coniquement (45) avec un diamètre agrandi dans le domaine de formation de flamme du tube de brûleur (2).
  8. Chaudière selon l'une des revendications 1 à 7, caractérisée en ce que le tube de brûleur (2) du brûleur pénètre dans le débouché de l'insert de chambre de combustion (7).
  9. Chaudière selon l'une des revendications 1 à 8, caractérisée en ce que le courant partiel de fumée recyclé dans la flamme est dévié à partir d'un domaine médian du canal de fumée (15).
  10. Chaudière selon l'une des revendications 1 à 9, caractérisée en ce que toute la jaquette d'eau (8) est constituée d'une pièce de fonderie monopièce.
EP90104852A 1989-03-14 1990-03-14 Chaudière de chauffage Expired - Lifetime EP0387859B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3908296A DE3908296C2 (de) 1989-03-14 1989-03-14 Heizkessel
DE3908296 1989-03-14

Publications (3)

Publication Number Publication Date
EP0387859A2 EP0387859A2 (fr) 1990-09-19
EP0387859A3 EP0387859A3 (fr) 1991-07-24
EP0387859B1 true EP0387859B1 (fr) 1995-06-21

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EP90104852A Expired - Lifetime EP0387859B1 (fr) 1989-03-14 1990-03-14 Chaudière de chauffage

Country Status (3)

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EP (1) EP0387859B1 (fr)
AT (1) ATE124127T1 (fr)
DE (2) DE3908296C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745805A2 (fr) * 1995-05-31 1996-12-04 Pyropac AG Chaudière
EP1004833A2 (fr) 1998-11-27 2000-05-31 Max Weishaupt GmbH Chaudière

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259951A1 (de) * 2002-12-20 2004-07-01 Robert Bosch Gmbh Wärmetauschereinheit
FR2952165B1 (fr) * 2009-10-30 2012-05-25 Dietrich Thermique Chaudiere a communication aeraulique entre la chambre de combustion et l'echangeur permettant d'eviter la resonance du bruleur
CN106352544A (zh) * 2016-11-24 2017-01-25 胜利油田物华石油装备制造有限公司 倾斜烟管加热炉
CN111828969B (zh) * 2020-07-13 2022-06-21 广州汤姆逊电气有限公司 一种高温循环式节能环保燃烧枪

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ATE58428T1 (de) * 1987-05-19 1990-11-15 Pc Patentconsult Ag Heizkessel.
DE3738622C1 (en) * 1987-11-11 1989-02-02 Wolf Klimatechnik Gmbh Heating furnace with equipment for recirculating flue gas
DE3905762A1 (de) * 1989-02-24 1990-08-30 Heim Hermann Masch Verfahren und feuerungsanlage zum reduzieren der stickoxidbildung beim verbrennen fossiler brennstoffe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745805A2 (fr) * 1995-05-31 1996-12-04 Pyropac AG Chaudière
EP1004833A2 (fr) 1998-11-27 2000-05-31 Max Weishaupt GmbH Chaudière
DE19854910A1 (de) * 1998-11-27 2000-06-08 Weishaupt Max Gmbh Heizkessel
DE19854910B4 (de) * 1998-11-27 2004-09-02 Max Weishaupt Gmbh Heizkessel

Also Published As

Publication number Publication date
DE59009264D1 (de) 1995-07-27
ATE124127T1 (de) 1995-07-15
DE3908296C2 (de) 1994-04-14
DE3908296A1 (de) 1990-09-20
EP0387859A2 (fr) 1990-09-19
EP0387859A3 (fr) 1991-07-24

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