FR2521269A1 - Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber - Google Patents

Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber Download PDF

Info

Publication number
FR2521269A1
FR2521269A1 FR8202199A FR8202199A FR2521269A1 FR 2521269 A1 FR2521269 A1 FR 2521269A1 FR 8202199 A FR8202199 A FR 8202199A FR 8202199 A FR8202199 A FR 8202199A FR 2521269 A1 FR2521269 A1 FR 2521269A1
Authority
FR
France
Prior art keywords
exchanger
combustion chamber
fact
boiler according
heat exchanger
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.)
Granted
Application number
FR8202199A
Other languages
French (fr)
Other versions
FR2521269B3 (en
Inventor
Jean-Claude Charron
Henry Guillot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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 Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to FR8202199A priority Critical patent/FR2521269A1/en
Publication of FR2521269A1 publication Critical patent/FR2521269A1/en
Application granted granted Critical
Publication of FR2521269B3 publication Critical patent/FR2521269B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/403—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the water tubes being arranged in one or more circles around the burner
    • 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
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

The boiler has a circular tube nest (1) with lower and upper headers (2,3). Water enters through the inlet (4), flows down one set of tubes and up another, to the outlet (5). The burner (9) and combustion chamber (8) are located above the heat exchanger. The combustion chamber is refractory lined (11) and discharges the hot gases through the interconnecting opening (6) in the heat exchanger. The cooled gases pass through the heat exchanger casing (20) to the outer casing (18) and through to the flue (17). Condensate is collected in the outlet branch (19).

Description

L'invention se rapporte à une chaudière équipée d'un échangeur à condensation et d'un brûleur à co- bustible liquide, dont la chambre de combustion isolée ou refroidie se trouve en amont dudit échan- geur.The invention relates to a boiler equipped with a condensing exchanger and a liquid fuel burner, the insulated or cooled combustion chamber of which is located upstream of said exchanger.

On connatt des chaudieres dans lesquelles l'échangeur thermique est constitue d'un faisceau cylindrique de tubes reliant entre eux des collecteurs d'extrémité, échangeur qui délimite une chambre de combustion parcourue par la flamme d'un brûleur qui cede la chaleur a l'eau circulant dans ces tubes.Boilers are known in which the heat exchanger consists of a cylindrical bundle of tubes connecting end collectors to each other, an exchanger which delimits a combustion chamber traversed by the flame of a burner which transfers heat to the water circulating in these tubes.

Certaines dispositions préférentielles prevoient que cet échangeur est disposé verticalement à ltinte- rieur d'une enveloppe isolante, le brûleur étant disposé juste au dessus de la chambre centrale, les gaz de combustion sortant à l'extrémité inférieure de cette chambre et remontant entre l'échangeur et l'enveloppe jusqu'à un orifice supérieur de sortie.Certain preferential provisions provide that this exchanger is arranged vertically inside an insulating envelope, the burner being disposed just above the central chamber, the combustion gases leaving at the lower end of this chamber and rising between the exchanger and the casing up to an upper outlet orifice.

L'eau dans l'échangeur circule d'un collecteur inférieur a un collecteur supérieur c 'est à dire a contre-courant de la flamme de brûleur.The water in the exchanger circulates from a lower collector to an upper collector, that is to say against the current of the burner flame.

Ce genre de chaudières dans lesquelles un echan- geur cylindrique délimite lui-même la chambre de combustion doit être de dimension suffisante pour que le melange combustible puisse brûler de façon correcte c'est à dire reçoive suffisamment d'air comburant. De plus pour que l'échange thermique soit le meilleur possible, il convient"d'habiller" les tubes d'eau d'ailettes ou de surfaces conductrices et de guider les gaz brûlés le long de ces tubes. Ceci conduit à des échangeurs encombrants et coûteux et qui n'excluent pas l'évacuation en pure perte à l'extérieur d'une bonne partie des produits de combustion à température encore élevée. This type of boiler in which a cylindrical exchanger itself delimits the combustion chamber must be of sufficient size so that the fuel mixture can burn correctly, that is to say receives sufficient combustion air. In addition, for the best possible heat exchange, it is necessary to "cover" the water tubes with fins or conductive surfaces and guide the burnt gases along these tubes. This leads to bulky and expensive exchangers which do not exclude the evacuation in pure loss to the outside of a good part of the combustion products at a still high temperature.

On sait aujourd'hui qu'il existe des échangeurs dits à condensation grâce auxquels on récupère les calories perdues en condensant la vapeur d'eau produite au cours de la combustion du mélange combustible. Des échangeurs de ce type sont formés d'une nappe de tubes longitudinaux a section allongée disposée suivant la génératrice d'un cylindre qui'relient entre eux un collec- teur inferieur et un collecteur supérieur. Les tubes sont légèrement écartés les uns des autres pour laisser des fentes de passage entre la chambre intérieure cylindrique et l'extérieur.We now know that there are so-called condensing exchangers thanks to which we recover the calories lost by condensing the water vapor produced during the combustion of the combustible mixture. Exchangers of this type are formed by a sheet of longitudinal tubes of elongated section arranged along the generatrix of a cylinder which connects a lower collector and an upper collector. The tubes are slightly spaced from each other to leave passage slots between the cylindrical interior chamber and the exterior.

Pour améliorer les échanges thermiques on fait en sorte que les tubes présentent un profil sensiblement trapézoTdal dont les faces latérales convergent vers le centre de la chambre intérieure, ce qui favorise l'écoulement laminaire du mélange gazeux sortant radialement de ladite chambre.To improve the heat exchanges, the tubes have a substantially trapezoidal profile, the lateral faces of which converge towards the center of the interior chamber, which promotes the laminar flow of the gas mixture leaving radially from said chamber.

Pour améliorer le rendement des chaudières a échangeur cylindrique et brûleur à combustible liquide, en même temps qu'obtenir un appareil de faible encombrement et d'un prix de revient très rais-onnable , la demanderesse a eu l'idée d'associer un échangeur du type à condensation décrit plus haut a un brûleur à combustible liquide, connu en soi, selon une disposition objet de la présente invention.To improve the efficiency of boilers with cylindrical exchanger and liquid fuel burner, at the same time as obtaining a device with a small footprint and a very reasonable cost price, the applicant had the idea of associating an exchanger of the condensing type described above has a liquid fuel burner, known per se, according to an arrangement which is the subject of the present invention.

Selon l'invention on dispose en amont de l'échangeur cylindrique de type à condensation une chambre de combustion chaude, isolée ou refroidie, dans laquelle s'effectue la combustion du mélange combustible provenant d'un brûleur disposé à la partie supérieure, de telle sorte que ne pénètrent dans l'échangeur que les gaz chauds provenant de ladite chambre. According to the invention, upstream of the cylindrical exchanger of the condensation type, there is a hot combustion chamber, insulated or cooled, in which the combustion of the combustible mixture from a burner arranged at the top takes place, such as so that only the hot gases from said chamber enter the exchanger.

Selon une autre caractéristique de l'invention l'échangeur disposé dans un boîtier fermé comporte un dispositif à chicanes pour la dérivation de produits de combustion vers une cheminée d'évacuation.According to another characteristic of the invention, the exchanger disposed in a closed housing comprises a baffle device for the diversion of combustion products to a discharge chimney.

Les autres caractéristiques et avantages de l'invention apparaitront à la lecture de la description qui va suivre d'une forme de realisation en référence aux dessins annexes qui représentent
Figure 1 : une vue schématique en élévation de la chaudière
Figure 2 : une vue de cbté partielle d'une variante de realisation. The other characteristics and advantages of the invention will appear on reading the description which follows of an embodiment with reference to the accompanying drawings which represent
Figure 1: a schematic elevation view of the boiler
Figure 2: a partial side view of an alternative embodiment.

Dans le mode de représentation illustré aux figures
1 et 2, la chaudière comporte un échangeur cylindrique de type à condensation constitue d'une nappe de tubes d'eau 1 reliant un collecteur circulaire inférieur 2 à un collecteur circulaire superieur 3.In the mode of representation illustrated in the figures
1 and 2, the boiler comprises a cylindrical exchanger of the condensing type consisting of a layer of water tubes 1 connecting a lower circular collector 2 to an upper circular collector 3.

L'eau circule dans ces tubes de haut en bas et de bas en haut grace a un jeu de chicanes non repre- sentées localises dans les collecteurs ; elle est admiseau collecteur supérieur 3 par un conduit d' entrée 4 et en sort par le conduit 5. Cet échangeur est muni d'un orifice central 6 à sa partie supérieure, par contre il est fermé par un fond 7 à sa partie inférieure.Water circulates in these tubes from top to bottom and from bottom to top thanks to a set of unrepresented baffles located in the collectors; it is admitted to the upper collector 3 by an inlet conduit 4 and leaves it through the conduit 5. This exchanger is provided with a central orifice 6 at its upper part, on the other hand it is closed by a bottom 7 at its lower part.

On dispose au dessus de l'échangeur et à l'aplomb de l'orifice 6 une chambre de combustion 8 de forme appropriée dans laquelle s'effectue la combustion du mélange combustible provenant d'un brûleur a pulvérisation 9 connu en soi La buse de sortie 10 de ce brûleur est orientée vers le bas dans la chambre de combustion et en direction de l'e- changeur. La chambre de combustion 8 représentée à la figure 1 est munie d'un isolant réfractaire 11. There is above the exchanger and directly above the orifice 6 a combustion chamber 8 of suitable shape in which the combustion of the fuel mixture from a spray burner 9 known per se takes place. outlet 10 of this burner is directed downwards into the combustion chamber and towards the exchanger. The combustion chamber 8 shown in FIG. 1 is provided with a refractory insulator 11.

Uans la représentation de la figure 2 elte n'est pas munie d'isolant mais entourée d'une coquille fermée 12 destinée au réchauffage de l'air nécessaire au brûleur. A cet effet la coquille est ouverte a l'air extérieur en 13 et raccordée par le tûbe 14 a l'enceinte d'aspiration d'air 15 du brûleur. Uans the representation of Figure 2 elte is not provided with insulation but surrounded by a closed shell 12 for heating the air necessary for the burner. To this end, the shell is open to the outside air at 13 and connected by the tube 14 to the air suction enclosure 15 of the burner.

Cette chambre de combustion 8 est indépendante del'é- changeur 1 puisqu'elle est rapportée de façon étanche sur l'orifice central 6. La combustion du mélange air-combustible s'effectue dans cette chambre et dans la zone interne de ltechangeur ne pénètrent que les gaz très chauds qui en résultent.This combustion chamber 8 is independent of the exchanger 1 since it is tightly attached to the central orifice 6. The combustion of the air-fuel mixture takes place in this chamber and in the internal zone of the exchanger does not penetrate than the very hot gases that result.

L'échangeur 1 (figure 1) est lose dans un boitier ferme 16 muni d'une cheminée d'évacuation 17, dont le fond 18 légèrement incline permet le recueil de l'eau de condensation qui est évacueenar le petit conduit 19. A l'intérieur de ce bottier 16 une enveloppe rectangulaire 20 formant chicane de derivation est disposé autour de l'échangeur et recueille les produits de combustion qui passent dans le bottier par un orifice 21 prévu sur le fond 22 de l'enveloppe.The exchanger 1 (FIG. 1) is lost in a closed box 16 provided with an evacuation chimney 17, the bottom 18 of which is slightly inclined allows the collection of the condensation water which is evacuated by the small conduit 19. A l inside this shoemaker 16 a rectangular envelope 20 forming a bypass baffle is disposed around the exchanger and collects the combustion products which pass into the shoemaker through an orifice 21 provided on the bottom 22 of the envelope.

Ce fond 22 est aussi légèrement incliné vers le centre pour permettre le ruissellement et l'éva- cuation de l'eau de condensation par l'orifice 21. This bottom 22 is also slightly inclined towards the center to allow the run-off and the evacuation of the condensation water through the orifice 21.

Claims (7)

RevendicationsClaims 1. Chaudière du type comportant un échangeur de1. Boiler of the type comprising a heat exchanger chaleur de forme cylindrique dont les tubes d'eau cylindrical heat including water tubes sont raccordés par leurs extrémités à un collec are connected by their ends to a collec teur inférieur et à un collecteur supérieur, dont lower tor and an upper collector, of which l'échangeur est disposé dans une enceinte fermée the exchanger is placed in a closed enclosure destinée à recueillir les produits de combustion, intended to collect combustion products, et comportant un brûleur à combustible liquide and having a liquid fuel burner disposé au dessus de l'échangeur et dont la arranged above the exchanger and whose flamme est orientée vers le bas en direction de flame is pointing down towards lui, caractérisée par le fait que l'échangeur (1) du it, characterized in that the exchanger (1) of the type a condensation connu en soi est disposé condensing type known per se is disposed dans un bolier fermé (16) comportant au moins in a closed bowl (16) comprising at least un dispositif à chicanes pour la dérivation de a baffle device for the derivation of produits de combustion vers une cheminée (17) et products of combustion to a chimney (17) and qu'une chambre de combustion (8) isolée ou re that a combustion chamber (8) insulated or re froidie est montée au dessus du boiter, inde coldness is mounted above the box, India pendamment de la zone interne de l'échangeur, la depending on the internal area of the exchanger, the buse de sortie du brûleur débouchant dans la burner outlet nozzle opening into the chambre. bedroom. 2. Chaudière selon la revendication 1 caractérisée2. Boiler according to claim 1 characterized par le fait que la chambre de combustion (8) est by the fact that the combustion chamber (8) is tapissée d'un isolant refractaire (11). lined with refractory insulation (11). 3. Chaudière selon la revendication 1 caractérisée3. Boiler according to claim 1 characterized par le fait que la chambre de combustion (8) by the fact that the combustion chamber (8) est refroidie oar un fluide exterieur.  is cooled by an external fluid. 4. Chaudière selon la revendication 3 caractérisée4. Boiler according to claim 3 characterized par le fait que la chambre de combustion (8) est by the fact that the combustion chamber (8) is logée à l'intérieur d'une coquille fermée (12) housed inside a closed shell (12) raccordée à l'enceinte d'aspiration d'air (15) connected to the air intake chamber (15) du brûleur. of the burner. 5. Chaudiere selon la revendication 1 caractérisée5. Boiler according to claim 1 characterized par le fait que le dispositif à chicanes du by the fact that the baffle device of the bottier est constitué d'une enveloppe rectan shoemaker consists of a rectan envelope gulaire (20) autour de l'échangeur (1), munie gular (20) around the exchanger (1), provided d'un orifice (21).  an orifice (21). 6. Chaudiere selon la revendication 5 caractérisêe 6. Boiler according to claim 5 characterized par le fait que le fond de l'enveloppe (20) est by the fact that the bottom of the envelope (20) is incliné en direction de l'orifice (21). inclined towards the orifice (21). 7. Chaudière selon la revendication 1 caractérisée7. Boiler according to claim 1 characterized par le fait que le fond (18) du boîtier est by the fact that the bottom (18) of the housing is incliné vers le conduit d'evacuation d'eau (1in.  inclined towards the water evacuation pipe (1in.
FR8202199A 1982-02-10 1982-02-10 Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber Granted FR2521269A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8202199A FR2521269A1 (en) 1982-02-10 1982-02-10 Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8202199A FR2521269A1 (en) 1982-02-10 1982-02-10 Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber

Publications (2)

Publication Number Publication Date
FR2521269A1 true FR2521269A1 (en) 1983-08-12
FR2521269B3 FR2521269B3 (en) 1984-12-28

Family

ID=9270867

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8202199A Granted FR2521269A1 (en) 1982-02-10 1982-02-10 Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber

Country Status (1)

Country Link
FR (1) FR2521269A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0472977A1 (en) * 1990-08-09 1992-03-04 Hoechst CeramTec Aktiengesellschaft Ceramic condensing boiler with water-cooled combustion chamber
EP2072938B1 (en) 2007-06-13 2017-08-09 A.M. S.R.L. Heat recovery apparatus with heat exchanger for boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0472977A1 (en) * 1990-08-09 1992-03-04 Hoechst CeramTec Aktiengesellschaft Ceramic condensing boiler with water-cooled combustion chamber
EP2072938B1 (en) 2007-06-13 2017-08-09 A.M. S.R.L. Heat recovery apparatus with heat exchanger for boiler

Also Published As

Publication number Publication date
FR2521269B3 (en) 1984-12-28

Similar Documents

Publication Publication Date Title
EP1625332B1 (en) Condensation heat exchanger with a gas/air heat collector
EP0040557A1 (en) Heating device with a heat-recovery system
EP0214883B1 (en) Condensing boiler with a reduced cloud of smoke
FR2529656A1 (en) LOST HEAT BOILER
EP0141707B2 (en) Condensing boiler for heating a heat carrier fluid
EP0373027B1 (en) Condensing boiler for heating with a heat-conveying liquid
FR2521269A1 (en) Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber
FR2565334A1 (en) Condensation boiler using a dry process
EP1366326B1 (en) Condensation heat exchanger, in particular for a boiler
FR2464437A1 (en) BOILER OF WHICH THE BURNER IS FORMED BY A WALL OF THE MIXING CHAMBER
FR2476808A1 (en) HEAT EXCHANGER FORMING ANTI-DEFLAGRATION BARRIER FOR DOMESTIC CENTRAL HEATING BOILERS
FR2479428A1 (en) Gas fired boiler with pressurised air supply - condenses steam formed in products of combustion and has combustion air supplied to space between inner and outer housings
FR2479956A1 (en) Domestic water heater - boiler - has spiral flue tube in parallel sections passing downwards through water
FR2485173A1 (en) Central heating unit gas burner - has gas fed to pairs of jets at mains pressure, enclosed by combustion air
FR2912210A1 (en) Heat exchanger for condensing boiler, has two coaxial tubular external and internal ferrules forming insert and defining tubular fume conduit with periodic contractions causing deflection of ferrules with radial component
FR2506910A2 (en) Gas fired boiler with pressurised air supply - condenses steam formed in products of combustion and has combustion air supplied to space between inner and outer housings
FR2512525A1 (en) Submerged-fire-tube water boiler - has combustion gas-to-water contra-flow coil with integral burner
FR2476804A1 (en) Economiser for central heating boiler - has triple copper water coil installed between boiler and chimney
FR2640028A2 (en) Condensing boiler for heating with a heat-transfer fluid
WO1982001582A1 (en) Heat exchanger for domestic central heating boilers
FR2513360A1 (en) Heat exchanger for wall mounted low pressure gas radiator - has parallel plates using heat of combustion gases to preheat inlet air
FR2525745A1 (en) Boiler for central heating - has flue gas heat exchanger and combustion air pre-heater
FR2577019A1 (en) HEATING INSTALLATION FOR OPEN FIREPLACE AND INVERSE DRAWING
FR2471571A1 (en) Heat exchanger for cylindrical burner - has exterior finned vertical water tubes surrounding burner connected by headers
BE382428A (en)

Legal Events

Date Code Title Description
ST Notification of lapse