EP0863365A2 - Générateur de vapeur - Google Patents

Générateur de vapeur Download PDF

Info

Publication number
EP0863365A2
EP0863365A2 EP97120542A EP97120542A EP0863365A2 EP 0863365 A2 EP0863365 A2 EP 0863365A2 EP 97120542 A EP97120542 A EP 97120542A EP 97120542 A EP97120542 A EP 97120542A EP 0863365 A2 EP0863365 A2 EP 0863365A2
Authority
EP
European Patent Office
Prior art keywords
burner
passage
channels
heat exchanger
steam generator
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
EP97120542A
Other languages
German (de)
English (en)
Other versions
EP0863365B1 (fr
EP0863365A3 (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, in particular for use in the kitchen technology, the one steam boiler, one burner shaft for supplying hot exhaust gases from a burner and at least a heat exchanger section with one or more channels for passing the exhaust gases of the burner and for heat exchange with the liquid in the boiler, wherein the channel or channels of the heat exchanger section on the one hand a trigger and on the other hand with a connecting section connected to the burner shaft and arranged so that the direction of flow the gases flowing from the burner to the flue in the channel or channels different from the direction of flow in the Burner shaft is.
  • Such steam generators are particularly popular an application for cooking devices in canteen kitchen technology.
  • a steam generator of the type mentioned is from the German Utility model 295 00 595.5 known. With this steam generator a design is used in which the burner shaft with the channels for heat exchange via a simple transverse shaft constant cross-section connected in the steam boiler is trained. This construction is complex and does not lead to optimal redirection of the burner’s exhaust gases, which are fed into the burner shaft to the channels of the Heat exchanger section.
  • this object is achieved in that Steam generator, in particular for use in kitchen technology, which is a steam boiler, a burner shaft for hotter feed Exhaust gases from a burner and at least one heat exchanger section with one or more channels for the passage of the exhaust gases of the burner and for heat exchange with that in the steam boiler located liquid, the channel or channels of the Heat exchanger section on the one hand with a fume cupboard and on the other hand connected to the burner shaft via a connecting section and are arranged so that the flow direction of the gases flowing to the flue in the duct or ducts is different from the direction of flow in the burner shaft, the connecting portion has a passage through a Opening in a wall of the burner shaft, especially in one Side wall of the burner shaft, and an insert is formed the opening opening the burner shaft with one or more channels of the heat exchanger section connects and partially through the Insert is closed.
  • Steam generator in particular for use in kitchen technology, which is a steam boiler, a burner shaft for hotter feed Exhaust gases from a burner and at least one heat exchanger section with
  • the burner shaft can be connected to the burner at one end and be closed at the other end, the shaft on the sides except for the culvert or culverts also closed is.
  • the burner shaft in the Steam boiler should be designed so that its walls are simultaneously walls of the boiler and of the liquid in the boiler be cooled.
  • the channel or channels are the Heat exchanger section and the burner shaft parallel, the Exhaust gases at the transition to the connection section by 180 ° be diverted so that the exhaust gases in the ducts are reversed Flow in the same way as in the burner shaft.
  • the invention can provide that the opening in a side wall the burner shaft is formed and a mouth on the entry side of the exhaust gases coming from the burner into the burner shaft has and the use with the wall of the burner shaft is connected in the manner of a tongue and groove connection.
  • This makes possible a particularly simple construction in which the use after Kind of a slide on the wall of the burner shaft becomes.
  • the insert preferably has an A or H shape Cross-section. With this construction it is also possible to Cross section of the passage in a simple manner, namely by moving use, and thereby the flow to influence the channel or channels of the heat exchanger section.
  • the invention can further provide that the use in his Inside has a cavity with an opening in the Passage opens.
  • the cavity has at least one more Opening, preferably a plurality of openings, having a or more channels at a location downstream from the passage is connected so that part of the flow path in the or the channels is bridged.
  • the insert forms a flow bypass, which allows hot exhaust gases to enter an area of the Channel the heat exchanger in which the exhaust gases are already are cooled and otherwise only a small heat exchange would take place.
  • the invention can further provide that the heat exchanger section one adjoining the passage downstream Has distribution channel, from which branch off several side channels.
  • One can be arranged between the passage and the side channels Deflection device for deflecting the coming from the passage
  • Exhaust gases are provided in the longitudinal direction of the side channels be.
  • the passage can be designed as a throttle, the gas passing therethrough after passing on the side of the heat exchanger section is relaxed.
  • the steam generator several, preferably substantially identical heat exchanger sections has whose flow system for the exhaust gases the burner through a passage in a wall of the burner shaft is connected to the burner shaft.
  • the invention can also in particular if the walls of the Burner shaft are at the same time walls of the steam boiler Overheating protection tube in the burner shaft for introducing the exhaust gases of the burner in the burner shaft below the level of the Have liquid levels in the boiler. Is located the mouth of the overheating protection tube is preferably below the minimum liquid level required for the operation of the steam boiler is allowed.
  • the invention can also provide that a transfer channel between the walls of the burner shaft and the overheating protection tube is formed and the insert a second, in the transfer channel Mouthful passage which has one or more Channels of a heat exchanger section with the transfer channel at a location of the channel or channels downstream of the first Passage connects so that part of the flow path from bridging the first passage to the discharge through the channels, the first passage being formed outside the transfer duct is.
  • 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 and 12c, which branch off from a distribution channel 14 and through which the exhaust gases of the burner to a fume cupboard (not shown) 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 flow 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. Because the hot exhaust gases are under a higher pressure in the area of the passage 25, 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 are not the way over 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)
  • Detergent Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Combustion Of Fluid Fuel (AREA)
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 true EP0863365A2 (fr) 1998-09-09
EP0863365A3 EP0863365A3 (fr) 2000-08-02
EP0863365B1 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)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19949581C2 (de) * 1998-10-14 2003-09-25 Pentax Corp Motorgetriebene Fokussiereinrichtung für ein Visierfernrohr
DE10315818B4 (de) * 2003-04-07 2005-10-06 Rational Ag Dampferzeuger mit reduzierter Kalkablagerung
KR101389040B1 (ko) * 2007-07-05 2014-04-28 이베.엔떽 유체를 가압 상태에서 복수의 튜브로 통과시킴으로써 열을 발생시키는 열 발생 장치 및 상기 열 발생 장치를 사용하는 열역학적 시스템
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
EP3701797B1 (fr) 2019-02-26 2023-08-09 Electrolux Professional S.p.A. Four comprenant un générateur de vapeur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE630357A (fr) * 1962-01-30
DE2807166A1 (de) * 1978-02-20 1979-08-23 Nils Oestbo Dampf- oder heisswasserkessel
DE29500595U1 (de) * 1994-01-17 1995-03-02 Zanussi Grandi Impianti S.p.A., Pordenone Backofen mit einem einen Gebläsebrenner aufweisenden Dampferzeuger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US608291A (en) * 1898-08-02 Water-heater
US4178880A (en) * 1976-11-11 1979-12-18 Nils Ostbo Furnace

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE630357A (fr) * 1962-01-30
DE2807166A1 (de) * 1978-02-20 1979-08-23 Nils Oestbo Dampf- oder heisswasserkessel
DE29500595U1 (de) * 1994-01-17 1995-03-02 Zanussi Grandi Impianti S.p.A., Pordenone Backofen mit einem einen Gebläsebrenner aufweisenden Dampferzeuger

Also Published As

Publication number Publication date
DE19708229C2 (de) 1999-01-21
ATE226296T1 (de) 2002-11-15
JP3527841B2 (ja) 2004-05-17
EP0863365B1 (fr) 2002-10-16
JPH1182904A (ja) 1999-03-26
DE19708229A1 (de) 1998-09-10
US6076518A (en) 2000-06-20
DK0863365T3 (da) 2003-02-17
EP0863365A3 (fr) 2000-08-02
DE59708490D1 (de) 2002-11-21

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