EP1002993A2 - Chaudière pour combustibles liquides - Google Patents

Chaudière pour combustibles liquides Download PDF

Info

Publication number
EP1002993A2
EP1002993A2 EP99890351A EP99890351A EP1002993A2 EP 1002993 A2 EP1002993 A2 EP 1002993A2 EP 99890351 A EP99890351 A EP 99890351A EP 99890351 A EP99890351 A EP 99890351A EP 1002993 A2 EP1002993 A2 EP 1002993A2
Authority
EP
European Patent Office
Prior art keywords
heating surface
boiler
heating
boiler according
return
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
EP99890351A
Other languages
German (de)
English (en)
Other versions
EP1002993A3 (fr
EP1002993B1 (fr
Inventor
Josef Goiginger
Anton Kreuleder
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.)
WINDHAGER ZENTRALHEIZUNG AG
Original Assignee
WINDHAGER ZENTRALHEIZUNG 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 WINDHAGER ZENTRALHEIZUNG AG filed Critical WINDHAGER ZENTRALHEIZUNG AG
Priority to AT99890351T priority Critical patent/ATE232948T1/de
Priority to SI9930265T priority patent/SI1002993T1/xx
Publication of EP1002993A2 publication Critical patent/EP1002993A2/fr
Publication of EP1002993A3 publication Critical patent/EP1002993A3/fr
Application granted granted Critical
Publication of EP1002993B1 publication Critical patent/EP1002993B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/02—Structural details of mounting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/04—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying action being obtained by centrifugal action
    • F23D11/08—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying action being obtained by centrifugal action using a vertical shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/06—Baffles or deflectors for air or combustion products; Flame shields in fire-boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/282—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with flue gas passages built-up by coaxial water mantles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/50—Water heaters for central heating incorporating heaters for domestic water incorporating domestic water tanks

Definitions

  • the present invention relates to a boiler for liquid fuels with a burner, Heating surfaces and a flue gas outlet according to the preamble of claim 1.
  • Boilers are known in which vertically arranged cylindrical heating surfaces are provided are. Such boilers are operated with evaporator burners, which are below the heating surfaces are arranged in a separate combustion chamber. The combustion air is replaced by one provided blower introduced. Between the combustion chamber and that through the heating surfaces enclosed space, an annular guide member is arranged. With such a The boiler transfers heat from the flames or flue gas to the heating surfaces primarily by gas radiation and is therefore of moderate efficiency. Furthermore, you can with such boilers, at least in certain operating points, form areas in which there is no flow, so that the heat transfer on the heating surfaces deteriorates further becomes.
  • boilers are known in which fuels prior to ignition and before the actual one Start of combustion within a hollow body, a so-called flame generator, in gaseous state can be mixed with combustion air and through openings in it Exit the flame generator to be ignited and burned.
  • DE 42 25 749 A relates to an evaporation burner.
  • This burner uses fuel evaporated in a porous body and introduced into a cylindrical mixing tube.
  • This mixing tube is mixed with the combustion air.
  • Concentric outside a cylindrical body for deflecting the flames is arranged in the mixing tube.
  • the object of the present invention is to develop the boiler described above in such a way that that an efficient heat transfer on the heating surfaces and thus a high efficiency is achieved. Furthermore, the exhaust emissions, especially the nitrogen oxide emissions, be reduced. By achieving a high level of performance, a small installation space is required be made possible with great performance. At the same time, maintenance and repair work should be carried out be easy and unproblematic.
  • the particularly advantageous solution of the invention is mainly achieved in that the main part of the burner, namely the flame generator within the Heating area enclosed space is located.
  • the heat transfer can not only by convection and gas radiation but also by solid-state radiation, which leads to leads to significantly higher efficiency.
  • the premix burner is arranged below the flame generator is, and is releasably connected to a part of the boiler containing the heating surfaces.
  • the boiler according to the invention is easily disassembled for inspection and To be able to carry out maintenance work, so that the maintenance effort is reduced can.
  • the performance of the boiler according to the invention can be improved in that A guide body is provided above the flame generator, which is essentially concentric is formed with the flame generator. Due to the narrowing of the cross-section of the guide body an acceleration of the flue gas flow is achieved, so that an improved Heat transfer can be achieved on the heating surfaces.
  • a particular improvement in the flue gas flow can be achieved in that above the first heating surface is provided a deflecting body, and that radially outside the another heating surface is arranged in the first heating surface. In this way it is caused that the flue gases first flow upwards on the inside of the first heating surface, over which the upper edge of the first heating surface and continue on the outside of this Flow heating surface.
  • the speed can be reduced by suitably designed flow baffles the flow can be set so that an optimal heat transfer is possible.
  • a Heating return flows preferably tangentially in the upper area of the first heating surface. It is particularly preferred if the heating return has a main inflow opening in the first heating surface and a side inflow opening in a further heating surface, which is arranged outside the first heating surface.
  • the Heating return is usually introduced in the lower area of the boiler. With a boiler of the construction according to the invention, however, would do this in certain operating conditions Condensation can form. When initiating the return to the top of the Condensation can be safely avoided in all operating states. In particular The generation of a tangential speed component of the recycled boiler water to avoid local hypothermia. By the Most of the return flow is introduced into the inner heating surface, there is a risk of Hypothermia additionally minimized by the fact that the heating surface is particularly affected is great.
  • heating circuits are served by one boiler, for example one heating circuit for underfloor heating and another heating circuit for radiators.
  • Such heating circuits must be independent at a significantly different temperature level be controllable from each other. This can largely influence one another be excluded that preferably the heating return a first return and has a further return, which before entering the heating surface in the first return is introduced like a nozzle.
  • the first heating surface is designed as a cylindrical body, which is washed on the outside by boiler water is, and that post-heating surfaces are arranged tubularly above the first heating surface.
  • Such a structure is particularly suitable for compact, wall-hung central heating boilers with or without integrated water heater. With such a solution, the vertical Installation position can be exploited in an advantageous manner. Since such wall kettles primarily in Installed in the living area, come the special advantages of pre-evaporating Premix burner particularly important in terms of low noise emissions.
  • the boiler according to the invention consists of a frame 1 on which a premix burner is arranged is that of an evaporator unit 2 and a cylindrical one arranged above it Flame generator 4 exists.
  • the evaporator unit 2 is connected via an air supply line 3 Combustion air and via a fuel line, not shown, with a liquid Fuel supplied.
  • a flange plate 6 is arranged in the upper section of the frame 1.
  • a seal is designated 9.
  • FIGS. 2 and 3 is a preferred embodiment of the releasable connection between the Frame 1 and the upper part 5 of the boiler shown.
  • a seal that is not visible in FIGS. 2 and 3 is in one Groove inserted in the lower section of part 5.
  • a locking screw 10 serves the generate the necessary contact pressure, and to prevent the burner from being released accidentally.
  • a first heating surface 11 is provided, which is essentially is cylindrical and is arranged concentrically to the flame generator 4.
  • a guide body 12 is arranged on the first heating surface 11 is also cylindrical and concentric with the flame generator 4 and the first Heating surface 11 is arranged.
  • the guide body 12 is made of a heat-resistant and insulating Material made.
  • Radially outside and concentric to the first heating surface 11 is one arranged further heating surface 13, which is closed at the top by a deflecting body 14 is.
  • Flow baffles are in the gap 15 between the heating surfaces 11 and 13 16 arranged.
  • On the outer circumference of the further heating surface 13 there is a flue gas vent 17 attached.
  • the structure described above achieves the following function. That from the evaporator unit 2 outflowing fuel-air mixture is in the flame generator 4th completely evaporated and released to the outside and burned.
  • the smoke gases flow along the arrow 18 first along the inner surface of the first heating surface 11 upwards.
  • the guide body 12 causes a narrowing of the flow cross section and an acceleration the flow reached.
  • the deflection body 14 directs the flow outwards back so that it fits into the gap 15 between the first heating surface 11 and the further heating surface 13 flows down.
  • the Upper deflecting body 14 removably arranged on the upper edge of the further heating surface 13.
  • the baffles 16 force the flue gases to flow up and down along the circumference of the heating surfaces 11, 13.
  • the boiler according to the present invention can both can be operated as a condensation boiler as well as a conventional low-temperature boiler.
  • the heating surfaces in the flue gas path are so generously dimensioned and out corrosion-resistant material, so that condensation of the flue gas is brought about can, which also uses the heat of condensation of the water contained in the exhaust gases becomes.
  • the energy contained in the fuel is almost to the Calorific value used.
  • the resulting condensate is at the lowest point of the flue gas path 18 derived.
  • the heating return is initiated on one low point of the heating surface. This ensures that the flue gases in the last part of their Flow path are brought to the lowest possible temperature level, so that a high efficiency is achieved.
  • the heating return has a first return connection 20 and a further return connection 21.
  • These return connections 20, 21 are, for example, an underfloor heating circuit and assigned to a radiator heating circuit.
  • the first return is designed as a nozzle 22 in order to which is arranged around an annular space 23 concentrically.
  • the further return 21 opens into this annulus 23. In this way it is possible to use the circulation pumps for both heating circuits to be arranged in the return, with a mutual influence of the two heating circuits is largely avoided.
  • the combined return flows in via a manifold 24 a flow tube 25.
  • the flow tube 25 opens into the first heating surface 11. From the 5 that the opening 26 of the flow tube 25 is bevelled, so that the backflowing heating medium has a tangential speed component granted along arrow 27.
  • a boiler connector 29 envelops the flow tube 25. This configuration ensures that the majority of the recycled heating medium is introduced into the first heating surface 11.
  • a welded one Steel plate 33 in the region of the confluence of the flow tube 25 increases the Thermal resistance and also prevents the occurrence of cold areas on the boiler wall, which could lead to condensation.
  • Concentric a heating surface 11 is arranged for the flame generator 4.
  • the heating surface 11 is on her Top finished with a plate 31.
  • Starting from this plate 31 are reheating surfaces 32 led vertically upwards.
  • Inside the reheating surfaces are made of sheet metal curved flow obstacles used in a conventional manner, the flow paths Extend the flue gases to improve heat transfer.
  • These missions are also referred to as turbolators 33.
  • a domestic water tank 34 arranged. All of these components are arranged in a common trough 35, the intermediate space 36 is filled with heating medium. Isolation 37 prevents excessive heat loss.
  • the evaporator unit 2 of the burner is below the tub 35 is arranged, and, as in the embodiment described above, can be easily expanded downwards.
  • the combustion air is either from the at 38 Environment or supplied from an appropriate pipeline.
  • the flue gas connection is designated with 39.
  • the particular advantages of the invention come Solution especially for carrying.
  • a premix burner is shown partially schematically.
  • a flame holder 4 is placed, which has a plurality of openings 40 in one has a network or grid-like structure.
  • the interior 41 of the evaporator unit 2 stands via openings 42 with the flame holder 4 in connection.
  • An atomizer cup is located on a shaft 43 which projects into the interior 41 through an opening 44 45 attached, which is covered at the top by an atomizer plate 46.
  • Atomizer blades 47 which also rotate with the shaft 43, cause further swirling the fuel which is introduced into the atomizer cup 45 via a line 48, and emerges from this upwards.
  • the combustion air is over a not shown Fan, which can also be driven by the shaft 43, through the opening 44 in the Blown interior 41. In this way it is ensured that a through the openings 42 finely distributed fuel-air mixture is guided.
  • the burner according to the invention enables a very uniform temperature distribution can be achieved so that a high performance can be achieved and at the same time the nitrogen oxide emission can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP19990890351 1998-11-12 1999-11-03 Chaudière pour combustibles liquides Expired - Lifetime EP1002993B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT99890351T ATE232948T1 (de) 1998-11-12 1999-11-03 Kessel für flüssige brennstoffe
SI9930265T SI1002993T1 (en) 1998-11-12 1999-11-03 Boiler for liquid fuels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT189298A AT410588B (de) 1998-11-12 1998-11-12 Kessel für flüssige brennstoffe
AT189298 1998-11-12

Publications (3)

Publication Number Publication Date
EP1002993A2 true EP1002993A2 (fr) 2000-05-24
EP1002993A3 EP1002993A3 (fr) 2000-10-04
EP1002993B1 EP1002993B1 (fr) 2003-02-19

Family

ID=3523276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990890351 Expired - Lifetime EP1002993B1 (fr) 1998-11-12 1999-11-03 Chaudière pour combustibles liquides

Country Status (4)

Country Link
EP (1) EP1002993B1 (fr)
AT (1) AT410588B (fr)
DE (1) DE59904319D1 (fr)
DK (1) DK1002993T3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225749A1 (de) 1991-08-06 1993-02-11 Mikuni Kogyo Kk Verdampfungsbrenner

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287857A (en) * 1979-09-11 1981-09-08 Leo Schnitzer Burner-boiler combination and an improved burner construction therefor
JPS6199010A (ja) * 1984-10-19 1986-05-17 Matsushita Electric Ind Co Ltd 液体燃料燃焼装置
DE3608698A1 (de) * 1986-01-18 1987-07-23 Deutsche Forsch Luft Raumfahrt Brenner-heizkessel-einheit
CH677139A5 (fr) * 1988-06-24 1991-04-15 Ygnis Sa
US5531212A (en) * 1994-04-14 1996-07-02 Clean Burn, Inc. Multi oil furnace
DE19519963C2 (de) * 1995-05-31 1997-07-17 Pyropac Ag Heizkessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225749A1 (de) 1991-08-06 1993-02-11 Mikuni Kogyo Kk Verdampfungsbrenner

Also Published As

Publication number Publication date
ATA189298A (de) 2002-10-15
DE59904319D1 (de) 2003-03-27
EP1002993A3 (fr) 2000-10-04
EP1002993B1 (fr) 2003-02-19
DK1002993T3 (da) 2003-06-16
AT410588B (de) 2003-06-25

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