WO2009093073A2 - Appareil échangeur thermique, système et procédé - Google Patents

Appareil échangeur thermique, système et procédé Download PDF

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Publication number
WO2009093073A2
WO2009093073A2 PCT/GB2009/050056 GB2009050056W WO2009093073A2 WO 2009093073 A2 WO2009093073 A2 WO 2009093073A2 GB 2009050056 W GB2009050056 W GB 2009050056W WO 2009093073 A2 WO2009093073 A2 WO 2009093073A2
Authority
WO
WIPO (PCT)
Prior art keywords
flue gas
condensate
heat exchanger
heat
vessel
Prior art date
Application number
PCT/GB2009/050056
Other languages
English (en)
Other versions
WO2009093073A3 (fr
Inventor
Stephen Taylor
Original Assignee
Enertek International Limited
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 Enertek International Limited filed Critical Enertek International Limited
Priority to EP09704009A priority Critical patent/EP2242958A2/fr
Publication of WO2009093073A2 publication Critical patent/WO2009093073A2/fr
Publication of WO2009093073A3 publication Critical patent/WO2009093073A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • 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
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • 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
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

Definitions

  • the invention relates generally to heat exchanger apparatus, to heating systems including such apparatus and to methods of heat exchange.
  • the invention in particular relates to heat exchanger apparatus and methods for use in association with high efficiency condensing heating systems such as "boilers'Vwater heaters that operate by combustion of fuel, for example oil or gas, to produce hot gaseous combustion products.
  • the invention specifically relates to the provision of a secondary stage heat exchanger, and to a method for the recovery of heat from combustion product gases at a secondary stage, locatable fluidly downstream of a primary heat exchanger apparatus which may be of conventional design.
  • a conventional apparatus typically includes a burner for burning a mixture of fuel and air to generate hot combustion gases, typically predominantly carbon dioxide, water and excess air, and a heat exchanger. The purpose of the heat exchanger is to extract the resultant thermal energy from the combustion gases.
  • a burner combusts a mixture of fuel and air and the gaseous products of combustion and excess air (hereinafter referred to as flue gas) are passed across a suitable heat transfer apparatus, by a suitable impeller for example, before being exhausted to the atmosphere by suitable ducts or similar.
  • the heat transfer apparatus transfers heat energy from the flue gas to a heat transfer medium.
  • the heat transfer medium is a fluid, such as water, and the heat transfer apparatus comprises a conduit for such fluid having a fluid input and a fluid output and suitable heat transfer means, for example in the form of heat transfer surfaces, to facilitate the transfer of heat from the flue gases to the heat transfer fluid.
  • the heat transfer fluid may be a working fluid which it is primarily intended to heat, for example being water for use directly in domestic or commercial hot water or central heating systems or other industrial processes, or may be used indirectly to transfer heat to such a primary working fluid for example via an indirect hot water system.
  • Such a heat exchanger apparatus may be of tubular, monoblock or sectional construction. In all such arrangements, heat transfer is effected by radiation in the immediate vicinity of the burner and by convection/ conduction thereafter through the suitable heat transfer surfaces from the hotter flue gas to cooler heat transfer medium in accordance with the temperature gradient at the relevant point in the heat exchanger.
  • Condensate is formed in that part of the heat exchanger, away from the burner, where the temperature of the flue gas falls below the water dew point.
  • the condensate typically flows under gravity through suitable flow channels and exits the bottom of the heat exchanger into a suitable collection vessel.
  • the condensate is typically discarded.
  • That part of the heat exchanger where condensation occurs is sometimes referred to as the secondary part of the exchanger or condensing section, and may be of different construction to a primary part where heat is recovered directly and only from hot flue gas.
  • Such a primary and secondary part may be of separate construction, particularly in heat exchangers of sectional construction. Multiple exchanger apparatus or sections may be provided successively.
  • all such heat exchanger arrangements are referred to as, and considered to be, primary stage heat exchangers.
  • exhaust gases may still include a substantial quantity of residual water vapour. It is known that this can produce a visual effect referred to as "pluming" which can impact on a surface in the vicinity of an external vent, for example on an external wall. This pluming effect is unsightly and undesirable, particularly in domestic environments.
  • the exhaust gases vented from a conventional condensing boiler/ water heater may also include various minor combustion products, such as oxides of sulphur and nitrogen, which, even when present in relatively low quantities, can still constitute an undesirable pollutant. It is generally desirable to develop a heat exchanger apparatus and method that mitigates one or more of the above problems and/or provides one or more of the following additional features: the potential for recovery of additional heat from combustion gases; - the reduction of an undesirable tendency to produce pluming; and the reduction of otherwise undesirable and, for example, pollutant combustion product levels in exhaust gases vented to the atmosphere.
  • the invention thus comprises a "secondary stage" heat exchanger for a condensing heater apparatus such as that generally referred to as a condensing boiler/ water heater that operates by combustion of fuel, for example oil or gas, to produce hot gaseous combustion products and uses a condensing principle to improve efficiency of operation, for example in known manner.
  • the heat exchanger comprises a "secondary stage” heat exchanger in the sense that it is located fluidly downstream (as regards flue gas flow) of a primary heat exchanger apparatus which recovers heat initially from the hot flue gas and produces condensate in generally conventional manner.
  • the secondary apparatus of the invention is fluidly in line with such a primary heat exchanger in use in two respects. Firstly, it includes a containment vessel which acts, at least in part, as a reservoir for condensate liquid produced in the primary stage, and is therefore so positioned and/or adapted as to enable condensate to flow into the interior of the vessel. Secondly, a flue gas conduit is provided for defining a flow path for the flue gases from such a primary stage into the secondary stage apparatus of the invention.
  • the invention is distinctly characterised in that the flue gas conduit directs flue gas into the condensate liquid itself during use, in that it is provided with an outlet which lies in use below a designed condensate level.
  • the vessel is suitably configured, for example by provision of condensate outlet means at an appropriate height, to maintain a designed condensate level above the outlet of the flue gas conduit.
  • the flue gases conveyed from the primary stage heat exchanger are caused to pass through condensate in the vessel, and to give up further residual thermal energy directly to the condensate liquid.
  • the condensate liquid is heated, and this heat is retrieved by the heat transfer means associate with (e.g. around or within) the vessel such as to enable heat transfer to be effected from the heated condensate liquid.
  • the heat transfer means are at least partly located within the vessel so as to pass below the designed condensate level in use.
  • the heat transfer means comprises a heat transfer conduit defining a flow path for a heat transfer medium therethrough.
  • the heat transfer medium is a heat transfer fluid and more preferably a heat transfer liquid.
  • the heat transfer liquid may be water.
  • the conduit is provided with or comprises appropriate heat transfer surfaces to effect efficient transfer of heat from the condensate liquid to the heat transfer medium. Additional heat energy still present in the flue gases after the primary stage of heat exchange is therefore recovered. This recovery can be particularly efficient where the heat transfer medium is a liquid, so that the transfer within the secondary heat exchanger is essentially a liquid to liquid transfer.
  • Condensate liquid is put to use as part of the heat exchange apparatus rather than simply being discarded.
  • the vessel defining a reservoir for condensate is considerably deeper than a conventional condensate discard sump in a conventional condensing boiler/ water heater apparatus.
  • the vessel is configured to define in use a partially or completely enclosed volume comprising a lower portion in which condensate liquid is retained and an upper portion which is vented to atmosphere. In this way, flue gases conveyed via the conduit bubble through the condensate liquid in the lower portion and rise to the upper portion to be vented.
  • the vessel defines at least a partial enclosure containing condensate liquid in use, and allows flue gas which rises to the surface of the condensate liquid to be vented, ultimately to atmosphere, while at the same time providing for maintenance of generally constant condensate liquid levels.
  • the vessel includes at least one condensate outlet and at least one aperture serving as an outlet vent for flue gas and drain point.
  • the condensate outlet defines a condensate liquid level in use.
  • the outlet vent for flue gas is disposed above this level in use.
  • the vessel preferably comprises one or more condensate outlets disposed in a wall thereof to define a condensate liquid level in use.
  • a steady-state operation will be set up whereby as condensate constantly replenishes the condensate liquid retained in the vessel, excessive condensate may overflow via the condensate outlet.
  • This serves two purposes in particular. Firstly, it helps to maintain a constant condensate liquid level in use and thus ensures that the flue gas conduit outlet and the secondary heat transfer means remain below the condensate liquid level during use. Secondly, it tends to assist in the maintenance of a chemical steady state with respect to composition in the condensate liquid, preventing excessive build up of acidity from dissolved combustion products.
  • the vessel should be of a material that is chemically and electrically inert when in contact with condensate.
  • at least one aperture is provided in the vessel as an entry point for at least one flue gas conduit to deliver flue gas from a primary stage heat exchanger into the vessel.
  • An aperture is also provided to allow condensate from the flue gas generated in the primary stage to enter the vessel and replenish the condensate liquid contained in the vessel.
  • the flue gas conduit also serves as a conduit for condensate and the aperture provided for the flue gas conduit serves as an aperture for both flue gas and condensate.
  • the vessel comprises a complete, substantially fluid-tight enclosure, save for such necessary apertures, inlets and outlets. That is to say, the vessel comprises a complete enclosure, save for at least one flue gas aperture, at least one condensate aperture which may be coextensive therewith, preferably at least one condensate overflow outlet, and at least one flue gas outlet to allow flue gas to be vented, and preferably also a drain point for shipping and service.
  • the heat transfer means provided with the vessel comprises a fluid conduit having an inlet and an outlet external to the vessel to define a flow path for a heat transfer medium around or more preferably through the vessel (and at least in part through the condensate in use).
  • a conduit comprises, for example, an arrangement of pipes.
  • the pipes may be coiled or finned.
  • a spiral pipe arrangement is provided.
  • the conduit walls comprise heat transfer surfaces to allow heat to be transferred from the condensate liquid to the heat transfer medium.
  • These may be suitably configured and/or include suitable additional structures to enhance thermal transfer.
  • liquid to liquid transfer can be particularly efficient, and simple pipe walls may be sufficient to serve as a heat transfer surface without the requirement for more complex structures, such as are typical for gas to liquid transfer.
  • the conduit needs to be chemically and electrically inert when in contact with condensate.
  • the heat exchanger apparatus of the invention is thus a "secondary stage” heat exchanger located in use downstream of a conventional "primary stage” condensing heat exchanger.
  • the primary stage heat exchanger can be of any suitable condensing design.
  • reference herein to "primary stage” and “secondary stage” should not be read as in any way limiting the heat exchanger structure at the primary stage to monoblock alternatives, for example.
  • a primary stage heat exchanger apparatus for use in conjunction with the heat exchanger apparatus of the invention may still be sectioned, for example into a primary part and a secondary part. More than one heat exchanger may be provided in a primary stage apparatus, for example disposed serially or in parallel.
  • a heat exchange system comprising a secondary stage heat exchanger as hereinbefore described in serial connection with, and fluidly downstream of, a primary stage principal heat exchanger of suitable condensing design in a condensing heater apparatus.
  • the present invention provides a secondary stage heat exchanger as hereinbefore described disposed serially in conjunction with a primary condensing heater and heat exchanger comprising a heat transfer medium conduit defining a flow path for a heat transfer medium through the primary heat exchanger, a gas flow path means for defining a flow path for hot flue gas from a burner through the primary heat exchanger to a flue gas outlet, and heat transfer surfaces associated with the conduit for transferring heat from the gas in the gas flow path to a heat transfer medium in the conduit of the primary heat exchanger.
  • the flue gas conduit in the secondary stage apparatus is so disposed that the inlet thereof is in fluid communication with an outlet of the flue gas flow path in the primary stage heat exchanger, either directly or via a flow path defined by a transfer conduit.
  • the primary stage heat exchanger includes means to collect condensate, and condensate flow path means defining a flow path from the primary heat exchanger to the containment vessel of the secondary heat exchanger.
  • the secondary heat exchanger may be located below the flue outlet of the primary heat exchanger to allow condensate from the flue gas to enter the vessel under the action of gravity.
  • flue gas from a conventional "primary" condensing heat exchanger including gaseous combustion products from burning of fuel such as oil or gas and excess air is caused to pass through recovered condensate liquid.
  • This can produce efficient and effective recovery of residual heat from the flue gas and/or the condensate.
  • This recovered heat is drawn off via the "secondary" heat exchanger which is configured as described above. Flue gas bubbles to the surface of the condensate liquid and is collected within an upper volume of the vessel above the condensate surface where a suitable vent can be provided from which the gas can be conveyed to the atmosphere.
  • the method comprises maintaining a generally steady-state level of collected condensate liquid within the retaining vessel by means of operation of the suitably positioned overflow outlet in a wall of the vessel.
  • a secondary advantage of setting up a steady state mode of operation, whereby the condensate level is constantly replenished by condensate recovered from the primary condensing heat exchanger, and is constantly discarded by an overflow outlet, is that a relatively steady chemical composition state may also be maintained and acidity build up reduced.
  • the method comprises the additional steps of:
  • the heating apparatus is operated in condensing mode at all times. As will be familiar however this is dependent on temperature. A condensing boiler does not condense if maximum temperature is above dew point.
  • figure 1 illustrates a possible embodiment of a heat exchanger apparatus operating in accordance with the principles of the invention and suitable for putting into practice the principles of the method of the invention
  • figure 2 illustrates an alternative arrangement of flue gas conduit outlet for fitment with the apparatus of figure 1.
  • the figure illustrates a secondary or subsidiary stage heat exchanger in accordance with an embodiment of the invention, designated generally by reference 1.
  • a primary condensing heating system of the type generally referred to as a condensing boiler/ water heater with suitable heat exchanger apparatus (not shown).
  • a condensing heating system will familiarly consist of a burner for burning a suitable fuel, for example gas or fuel oil, to produce hot gaseous combustion products, and an impeller to cause the hot gaseous combustion products to pass through a suitable flow path in at least one heat exchanger to extract some of the heat therefrom and, at least in part, cause water vapour to condense from the combustion product.
  • the apparatus 1 is used as a secondary heat exchanger fluidly downstream of such a primary in use.
  • the apparatus 1 includes a fluid containment vessel 2 which provides a reservoir for condensate liquid formed in the primary stage condensing heat exchanger.
  • the vessel 2 defines a lower volume 4 for retaining collected condensate liquid in use and an upper volume 6 above the lower volume 6 for gaseous containment.
  • the upper volume 6 is vented to exhaust via the vent 8.
  • the lower volume 4 is defined, and the condensate level 10 maintained, via the drain 12.
  • the vessel 2 thus serves as a relatively deep condensate sump.
  • flue gases (shown by arrow 14) pass from a suitable primary stage condensing heat exchanger via the flue gas conduit 16.
  • the flue gas conduit 16 enters the vessel 2 via a suitable aperture 18.
  • Condensate produced in the primary stage is also passed into the vessel 2 to replenish the reservoir 4 either via the flue gas conduit 16 or a separate 20.
  • the vessel 2 forms an almost complete enclosure, and a discrete conduit 20 are provided to allow condensate to pass into the volume 4,6 defined by the vessel 2.
  • condensate may pass via the conduit 4.
  • Alternative arrangements could, of course, be envisaged, for example where the vessel 2 was open at the top and condensate dropped into the vessel 2 through the open top or at least one further aperture was provided for condensate to enter the vessel 2.
  • conduit 16 which has an open outlet 22 below the level of condensate liquid 10 in the vessel 2, causing the flue gas 14 to pass directly into the condensate 4 in the vessel 2 in the direction of and shown by arrows 24.
  • Flue gas 24 is thus passed directly through the condensate liquid 4 retained in the vessel 2, thereby raising the condensate 4 temperature but extracting heat (sensible and latent) from the flue gas 24.
  • the flue gas 24 bubbles through the condensate liquid 4 and rises to the surface of the condensate volume 4 into the gaseous volume 6 above it and is vented via the aperture 8.
  • condensate 4 is therefore used in an appliance for the direct extraction of heat from the flue gas 14, 24 and transfer of this heat to a primary or secondary water circuit via a suitable secondary stage heat transfer surface or heat exchanger.
  • a coil 26 is passed through the condensate vessel 2 thereby extracting heat from the condensate 4.
  • the heat transfer medium in the coil 20 may be sanitary water, central heating water or a combination of both.
  • a layer of mesh 28 is provided above the conduit 22 but below the surface 10 of the condensate 4 to reduce the formation of large bubbles as the flue gas 24 rises to the surface 10 of the condensate 4, and thus to reduce the noise in the system 1.
  • the system 1 recovers further residual heat from the flue gas 14, 24 which would otherwise be lost by a conventional primary stage apparatus alone.
  • Flue gas 14, 24 passes through relatively cool condensate 4 directly exchanging sensible heat and absorbing latent heat through quenching.
  • This direct heat exchange offers potential efficiency advantages over conventional gas/water heat transfer through the medium of a heat exchanger.
  • the secondary coil 26 becomes a water to water heat exchanger, which can generally be expected to simplify design, for example generally requiring less complex heat transfer surface arrangements, than a gas/water heat exchanger.
  • Sensing of a blocked condensation outlet 12 may be achieved by a suitably placed pressure sensing point positioned in the flue gas conduit 16.
  • the sensing tube 32 is provided for this purpose. This could also act as a sensor for a blocked flue outlet 22, provided that the water trap/ siphon on the condensate outlet 12 was of sufficient depth to prevent combustion products escaping via that route.
  • a drain point 34 can also be envisaged to allow any condensate 4 to be removed after the appliance has been tested and is to be shipped.
  • the suitable drain point 34 can also be used for servicing.
  • the flue gas conduit 16 is showing as a simple cylindrical arrangement.
  • Figure 2 modifies this arrangement in the vicinity of the outlet 22, where the cylindrical conduit 16 is provided with an outlet region which flares in a first direction and narrows in a second direction to produce an outlet aperture 30 which is of generally the same cross sectional area as the cross sectional area of the bore in the main part of the conduit 4, but which is considerably longer in the first direction and narrower in the second.
  • Providing an outlet 30 having this aspect ratio increases the effective surface area of bubbles in contact with condensate 4 in the vessel 2, in particular in a manner which tends to reduce the formation of the large bubbles as the flue gas 24 rises to the surface 10 of the condensate 4. This can complement the effect of the layer of mesh 28, or even allow it to be dispensed with.
  • the flue gas conduit 16 is shown extending from a generally cylindrical portion 16 to a flared portion 34 defining a rectangular outlet 30 of generally the same cross sectional area, but the same principle could apply if the entire flue gas conduit 16 defined a rectangular, or generally rectangular, flow bore.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention porte sur un appareil échangeur thermique d'étage subsidiaire pour un appareil de chauffage à condensation classique tel qu'une chaudière à condensation au mazout ou au gaz, comprenant une cuve pour recevoir et réserver un condensat de gaz de combustion provenant d'un échangeur thermique à condensation d'étage primaire de l'appareil de chauffage à condensation et un conduit de gaz de combustion ayant une entrée qui reçoit un gaz de combustion provenant d'un tel échangeur thermique d'étage primaire et une sortie, le conduit de gaz de combustion définissant un trajet de circulation pour un tel gaz de combustion; la sortie du conduit étant agencée pour amener du gaz de combustion à passer dans le condensat réservé dans la cuve en utilisation, et des moyens de transfert de chaleur étant prévus en association avec, et au moins partiellement à l'intérieur de, la cuve pour transférer de la chaleur du condensat auxdits moyens de transfert de chaleur. De ce fait, l'appareil transfère avantageusement de la chaleur, qui serait autrement perdue, du gaz de combustion sortant de l'échangeur thermique d'étage primaire à un milieu de transfert de chaleur pour augmenter le rendement de l'échangeur thermique d'étage primaire.
PCT/GB2009/050056 2008-01-25 2009-01-23 Appareil échangeur thermique, système et procédé WO2009093073A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09704009A EP2242958A2 (fr) 2008-01-25 2009-01-23 Appareil échangeur thermique, système et procédé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0801383.1 2008-01-25
GB0801383A GB2456819A (en) 2008-01-25 2008-01-25 Subsidiary stage heat exchanger and a method of recovering heat in a subsidiary stage of a boiler/water heater

Publications (2)

Publication Number Publication Date
WO2009093073A2 true WO2009093073A2 (fr) 2009-07-30
WO2009093073A3 WO2009093073A3 (fr) 2013-06-27

Family

ID=39186326

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/050056 WO2009093073A2 (fr) 2008-01-25 2009-01-23 Appareil échangeur thermique, système et procédé

Country Status (3)

Country Link
EP (1) EP2242958A2 (fr)
GB (1) GB2456819A (fr)
WO (1) WO2009093073A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3988199A1 (fr) * 2020-10-21 2022-04-27 Koen Batinas-Geurts Refroidissement graduel et nettoyage simultané de gaz de combustion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3233235A1 (de) * 1982-09-04 1984-03-08 Gerhard Dipl.-Ing. 1000 Berlin Friedrich Rauchgasausnutzung und reinigung
EP0106344A2 (fr) * 1982-10-19 1984-04-25 Hans Dr. Viessmann Chaudière de chauffage à condensation
EP0864352A2 (fr) * 1997-03-10 1998-09-16 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé pour purifier un gaz d'échappement d'un dispositif de combustion
DE19837269A1 (de) * 1998-08-17 2000-02-24 Rupert Merkl Vorrichtung und Verfahren zur Verringerung der Schadstoffemission von Heizungskleinanlagen unter gleichzeitiger Einbeziehung der Brennwertnutzung
EP1703244A1 (fr) * 2005-02-25 2006-09-20 Sgl Carbon Ag Bloc échangeur de chaleur pour gaz effluents contenant de la poussière

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2878644A (en) * 1956-05-01 1959-03-24 Experiment Inc Sonic velocity submerged combustion burner
US3060921A (en) * 1958-08-12 1962-10-30 Exxon Research Engineering Co Apparatus for heating liquids
FR2468850A1 (fr) * 1979-10-26 1981-05-08 Chauffe Cie Gle Procede et dispositif de rechauffage d'une quantite importante de liquide a l'aide d'un bruleur
US4570612A (en) * 1984-11-19 1986-02-18 Carrier Corporation Induced draft submerged burner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3233235A1 (de) * 1982-09-04 1984-03-08 Gerhard Dipl.-Ing. 1000 Berlin Friedrich Rauchgasausnutzung und reinigung
EP0106344A2 (fr) * 1982-10-19 1984-04-25 Hans Dr. Viessmann Chaudière de chauffage à condensation
EP0864352A2 (fr) * 1997-03-10 1998-09-16 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé pour purifier un gaz d'échappement d'un dispositif de combustion
DE19837269A1 (de) * 1998-08-17 2000-02-24 Rupert Merkl Vorrichtung und Verfahren zur Verringerung der Schadstoffemission von Heizungskleinanlagen unter gleichzeitiger Einbeziehung der Brennwertnutzung
EP1703244A1 (fr) * 2005-02-25 2006-09-20 Sgl Carbon Ag Bloc échangeur de chaleur pour gaz effluents contenant de la poussière

Also Published As

Publication number Publication date
GB2456819A (en) 2009-07-29
WO2009093073A3 (fr) 2013-06-27
GB0801383D0 (en) 2008-03-05
EP2242958A2 (fr) 2010-10-27

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