EP0863365B1 - Générateur de vapeur - Google Patents

Générateur de vapeur Download PDF

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Publication number
EP0863365B1
EP0863365B1 EP97120542A EP97120542A EP0863365B1 EP 0863365 B1 EP0863365 B1 EP 0863365B1 EP 97120542 A EP97120542 A EP 97120542A EP 97120542 A EP97120542 A EP 97120542A EP 0863365 B1 EP0863365 B1 EP 0863365B1
Authority
EP
European Patent Office
Prior art keywords
burner
passage
steam generator
ducts
generator according
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
Application number
EP97120542A
Other languages
German (de)
English (en)
Other versions
EP0863365A3 (fr
EP0863365A2 (fr
Inventor
Jaroslav Klouda
Maarten Botman
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.)
Rational AG
Original Assignee
Rational AG
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 Rational AG filed Critical Rational AG
Publication of EP0863365A2 publication Critical patent/EP0863365A2/fr
Publication of EP0863365A3 publication Critical patent/EP0863365A3/fr
Application granted granted Critical
Publication of EP0863365B1 publication Critical patent/EP0863365B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B7/00—Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body
    • F22B7/12—Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body with auxiliary fire tubes; Arrangement of header boxes providing for return diversion of flue gas flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B13/00—Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body
    • F22B13/005—Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body with flues, other than fire tubes

Definitions

  • the invention relates to a steam generator according to the preamble of patent claim 1.
  • a steam generator for a cooking device in which a burner shaft with channels for heat exchange via a simple transverse shaft Cross-section is connected, which is formed in a steam boiler.
  • This way of construction is complex and does not lead to an optimal diversion of the exhaust gases of a burner, which are introduced into the burner shaft, to the channels of the heat exchanger section.
  • a generic steam generator is known from DE 28 07 166.
  • This Steam generators flow exhaust gases from a burner from a flame tube in which the The burner is located in smoke pipes via a final combustion chamber.
  • the smoke pipes run through a steam drum, in which there is a heat exchange between the the flue gases flowing and a boiler fluid in the steam drum comes.
  • a disadvantage of this steam generator is that it is also not constructive simple type to different exhaust gas flows, especially when using different Burner, can be adjusted to ensure an even distribution of exhaust gases to achieve the flue pipes.
  • the generic steam generator such to develop further that the disadvantages of the prior art are overcome.
  • a steam generator is to be created in which the transfer of gas flow from the burner to channels of a heat exchanger section with simple means an optimization which allows flow conditions in the channel or channels of the heat exchanger section, even without a new design and redesign of the internals of the steam generator an adaptation to different flow conditions, such as when using different Burner, is possible.
  • the insert can in particular form a flow bypass, which allows hot Exhaust gases in an area of the channels of the heat exchanger in which the exhaust gases are already cooled down and in which otherwise only a small heat exchange would take place, or the passage can be designed as a throttle, the gas passing through after the passage on the side of the heat exchanger section is relaxed.
  • connection of the burner shaft with the flow system of the heat exchanger section solved in a simple and elegant way, while at the same time the flow conditions in the passage through the choice of a particular shape of the Use during the production of the steam generator so that an optimal Distribution of the exhaust gas flow to the channels for heat exchange occurs.
  • the cross section of the passage between the burner shaft and the heat exchanger section can be set so that the proportion of the gas flow which to that of channels in the heat exchanger section which are further away from the burner shaft are enlarged and thus the distribution of the gas flow to the channels of the heat exchanger section is evened out. Since the use is independent of the steam boiler and the Burner shaft can be produced, other flow-guiding or limiting measures realized in a simple manner by appropriate shaping of the insert become.
  • the steam generator a steam boiler 1 filled with water with an outlet 3, through which steam can be removed.
  • the water level in the Steam boiler is indicated by hatched lines.
  • a burner shaft 5 is formed, in the over a Overheating protection tube 7 the exhaust gases of a gas burner (not shown) be initiated.
  • These exhaust gases become a heat exchanger section 10 passed, which a plurality of channels 12a, 12b unc 12c, which branch off from a distribution channel 14 and through which the flue gases of the burner to a fume cupboard be directed.
  • the distribution channel 14 also opens into the fume cupboard.
  • This opening is a H-shaped insert 20 used, two parallel each Flanges the insert after the two wall sections 15a and 15b Grasp kind of a groove, so that the insert by plugging and Moving can be assembled.
  • the insert 20 serves as a throttle shaft and has an upwardly closed cavity 22 on.
  • the insert 20 projects down over the lower neck of the Channels 12a to 12c and forms together with the wall sections 15a and 15b and the bottom of the opening between them Wall sections a passage 25 and thus a flow restriction for the gas stream coming from the burner shaft.
  • the distribution channel 14 extends in a lower area under the side channels 12a, 12b and 12c, see above that a deflection section with a larger cross section than that of the passage 25 is formed.
  • the insert 20 By moving the insert 20 can the cross section of the passage 25, which the Transition from the burner shaft 5 to the heat exchanger section 10 forms, are set so that particularly favorable flow conditions and an optimal heat transfer can be guaranteed.
  • This cross-section is used for operation by fixing the insert 20 kept constant.
  • the combustion chamber of the gas burner preferably goes directly into the overheating protection tube 7, which e.g. are made of steel can.
  • the overheating protection tube 7 conducts the exhaust gases of the burner to a level below the water level in the steam generator 1 and preferably up to approximately the level of the approach of the channels 12a to 12c. In this way it is avoided that the hot exhaust gases of the burner with a non-cooled wall section of the burner shaft 5 come in contact above the water level and there cause overheating.
  • the overheat protection tube Part of the burner's combustion chamber.
  • FIGS. 3 and 4 Invention has the insert 20 additional pipe sections 30 and 32 on which the distribution channel 14 with the inner cavity 22nd connect the insert 20.
  • the interior of the insert 20 forms thus an uncooled bypass section for part of the hot Exhaust gases that come from the burner shaft 5 and feed them hot Exhaust gases at locations of channels 12a to 12c where those Exhaust gases that have not been routed via insert 20 have already cooled down. This is a leveling out the heat transfer in the axial direction. Since the hot exhaust gases Area of the passage 25 are under a higher pressure, than the already cooled exhaust gases in the channels 12a to 12c at the level of the pipe connections 30 and 32, arises in the area of the passage 25 a suction into the shaft 22, the bypass flow through this shaft.
  • FIGS. 5 and 6 essentially corresponds to the embodiment according to FIG. 3 and 4.
  • the same constructed heat exchanger sections 110a and 110b are provided, which heat exchanger channels 112a to 112c and 112e to 112f, respectively and have distribution channels 114a and 114b.
  • Every heat exchanger section is associated with a hollow insert 120a or 120b, which in the Area of the connecting section with the combustion chamber 3 a Passage 125a and 125b limited and pipes 130a and 130a and 132b and 132b with which hot exhaust gases are passed to a higher one In place of the distribution shafts 114a and 114b can.
  • Heat exchanger sections also other heat exchanger sections be provided along for example an axis perpendicular to the connection axis between the heat exchanger sections 110a and 110b can be arranged. Others too for example ring or polygonal arrangements of Heat exchanger sections are possible. Likewise, several can 1 with each other or with heat exchangers 3 can be combined.
  • FIGS. 7 and 8 essentially corresponds to the embodiment according to FIG. 3 and 4.
  • the insert 20 extends not to the top of the burner shaft, but ends at a certain distance from it, being inner cavity 22 is closed at the top.
  • Above the Insert 20 is another between the wall sections 15a and 15b, downwardly closed insert 40 arranged, wherein between the lower end of the insert 40 and the upper end of the Insert 20 a passage 42 remains free.
  • This passage serves in same as the pipes 30 and 32 of the transfer of hot exhaust gases in an upper area of the distribution channel 14 or the channels 12a to 12c, in which exhaust gases that do not cross the path have taken the channel 38, already by heat exchange with the Liquid in the steam boiler has already cooled down.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Detergent Compositions (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Combustion Of Fluid Fuel (AREA)

Claims (10)

  1. Générateur de vapeur, en particulier pour utilisation dans la technique des cuisines, présentant une chaudière à vapeur (1), un puits à brûleur (5) pour l'amenée de gaz d'échappement chauds venant d'un brûleur, et au moins un tronçon d'échangeur de chaleur (10) avec un ou plusieurs canaux (12a, 12b, 12c) pour le passage des gaz d'échappement du brûleur et pour l'échange thermique avec le liquide contenu dans la chaudière à vapeur (1), le ou les canaux (12a, 12b, 12c) du tronçon d'échangeur de chaleur (10), d'une part, étant relié(s) à une extraction et, d'autre part, par un tronçon de liaison étant relié(s) au puits à brûleur (5), et disposé(s) de manière que la direction d'écoulement des gaz d'échappement allant du brûleur vers l'extraction, dans le ou les canaux (12a, 12b, 12c), soit différente de la direction d'écoulement dans le puits à brûleur (5), le tronçon de liaison présente un passage (25) formé par une ouverture ménagée dans une paroi (15a, 15b) du puits à brûleur (5) et un insert (20) et l'ouverture étant partiellement formée par l'insert (20), caractérisé en ce que l'insert (20) est relié à la paroi (15a, 15b) du puits à brûleur (5), à la façon d'une liaison à rainure et clavette.
  2. Générateur de vapeur selon la revendication 1, caractérisé en ce que l'ouverture ménagée dans une paroi latérale présente une embouchure sur le côté entrée des gaz, venant du brûleur, dans le puits à brûleur (5).
  3. Générateur ,de vapeur selon la revendication 1 ou 2, caractérisé en ce que l'insert (20) présente intérieurement un espace (22) muni d'une ouverture débouchant dans le passage (25).
  4. Générateur de vapeur selon la revendication 3, caractérisé en ce que l'espace creux présente au moins une autre ouverture (30, 32) reliée à un ou plusieurs canaux (12a, 12b, 12c) du tronçon d'échangeur de chaleur (10), en un emplacement situé à l'aval du passage (25), de manière qu'une partie du chemin suivi par l'écoulement dans le ou les canaux (12a, 12b, 12c) soit pontée.
  5. Générateur de vapeur selon l'une des revendications 1 à 4, caractérisé en ce que le tronçon d'échangeur de chaleur (10) présente un canal distributeur (14) se raccordant en aval au passage (25), d'où se ramifient plusieurs canaux latéraux (12a, 12b, 12c).
  6. Générateur de vapeur selon la revendication 5, caractérisé par un dispositif de déviation disposé entre le passage (25) et les canaux latéraux (12a, 12b, 12c), afin de dévier les gaz d'échappement, venant depuis le passage (25), dans la direction longitudinale des canaux latéraux (12a, 12b, 12c).
  7. Générateur de vapeur selon l'une des revendications 1 à 6, caractérisé en ce qu'il présente une pluralité de tronçons d'échangeurs de chaleur (110a, 110b) dont des systèmes d'écoulement prévus pour les gaz d'échappement du brûleur sont chacun reliés au puits à brûleur (5) par un passage (125a, 125b) ménagé dans une paroi du puits à brûleur.
  8. Générateur de vapeur selon l'une des revendications 1 à 7, caractérisé par un tube de protection de surchauffe (7) installé dans le puits à brûleur (5), pour introduire les gaz d'échappement du brûleur dans le puits à brûleur (5) au dessous du niveau de liquide dans la chaudière à vapeur (1).
  9. Générateur de vapeur selon la revendication 8, caractérisé en ce que l'ouverture du tube de protection de surchauffe (7) se trouve peu au-dessus du niveau du ou des passages (25; 125a, 125b) qui relient le brûleur (5) au système d'écoulement du ou des tronçons d'échangeurs de chaleur (10; 110a, 110b).
  10. Générateur de vapeur selon la revendication 8 ou 9, caractérisé en ce qu'un canal de déversement (38) est réalisé entre les parois du puits à brûleur (5) et le tube de protection de surchauffe (7), et l'insert (20, 40) présente un deuxième passage (42) débouchant dans le canal de déversement (38), passage qui relie un ou plusieurs canaux (12a, 12b, 12c, 14) d'un tronçon d'échangeur de chaleur au canal de déversement (38), en un endroit situé en aval du premier passage (25), de manière qu'une partie du chemin d'écoulement venant depuis le premier passage (25) vers l'extraction par les canaux (12a, 12b, 12c, 14) soit ponté, le premier passage (25) étant réalisé à l'extérieur du canal de déversement (38).
EP97120542A 1997-02-28 1997-11-24 Générateur de vapeur Expired - Lifetime EP0863365B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19708229 1997-02-28
DE19708229A DE19708229C2 (de) 1997-02-28 1997-02-28 Dampferzeuger

Publications (3)

Publication Number Publication Date
EP0863365A2 EP0863365A2 (fr) 1998-09-09
EP0863365A3 EP0863365A3 (fr) 2000-08-02
EP0863365B1 true EP0863365B1 (fr) 2002-10-16

Family

ID=7821879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120542A Expired - Lifetime EP0863365B1 (fr) 1997-02-28 1997-11-24 Générateur de vapeur

Country Status (6)

Country Link
US (1) US6076518A (fr)
EP (1) EP0863365B1 (fr)
JP (1) JP3527841B2 (fr)
AT (1) ATE226296T1 (fr)
DE (2) DE19708229C2 (fr)
DK (1) DK0863365T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3701797A1 (fr) 2019-02-26 2020-09-02 Electrolux Professional S.p.A. Four comprenant un générateur de vapeur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6269580B1 (en) * 1998-10-14 2001-08-07 Asahi Kogaku Kogyo Kabushiki Kaisha Motor-driven focusing apparatus of a sighting telescope
DE10315818B4 (de) * 2003-04-07 2005-10-06 Rational Ag Dampferzeuger mit reduzierter Kalkablagerung
US8590491B2 (en) * 2007-07-05 2013-11-26 Ib.Ntec Device for producing heat by circulating a fluid under pressure through a plurality of tubes, and a thermodynamic system implementing such a device
US7823544B2 (en) * 2008-01-04 2010-11-02 Ecr International, Inc. Steam boiler
US9103603B2 (en) * 2009-10-28 2015-08-11 Tai-Her Yang Thermal conductive cylinder installed with U-type core piping and loop piping
EP2766685B1 (fr) * 2011-10-10 2017-09-20 Intellihot Green Technologies, Inc. Échangeur de chaleur hybride à tubes de gaz-eau combinés
RU2506493C2 (ru) * 2012-02-07 2014-02-10 Федеральное государственное военное образовательное учреждение высшего профессионального образования Военная академия Ракетных войск стратегического назначения имени Петра Великого МО РФ Способ генерации пара

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US608291A (en) * 1898-08-02 Water-heater
BE630357A (fr) * 1962-01-30
US4178880A (en) * 1976-11-11 1979-12-18 Nils Ostbo Furnace
DE2807166A1 (de) * 1978-02-20 1979-08-23 Nils Oestbo Dampf- oder heisswasserkessel
IT235007Y1 (it) * 1994-01-17 2000-03-31 Zanussi Grandi Impianti Spa Forno di cottura con generatore di vapore a bruciatore soffiato

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3701797A1 (fr) 2019-02-26 2020-09-02 Electrolux Professional S.p.A. Four comprenant un générateur de vapeur

Also Published As

Publication number Publication date
DE19708229C2 (de) 1999-01-21
DE59708490D1 (de) 2002-11-21
JPH1182904A (ja) 1999-03-26
DE19708229A1 (de) 1998-09-10
US6076518A (en) 2000-06-20
EP0863365A3 (fr) 2000-08-02
JP3527841B2 (ja) 2004-05-17
EP0863365A2 (fr) 1998-09-09
ATE226296T1 (de) 2002-11-15
DK0863365T3 (da) 2003-02-17

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