EP0347619A2 - Chaudière pour la combustion de combustibles liquides ou gazeux - Google Patents

Chaudière pour la combustion de combustibles liquides ou gazeux Download PDF

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Publication number
EP0347619A2
EP0347619A2 EP89109761A EP89109761A EP0347619A2 EP 0347619 A2 EP0347619 A2 EP 0347619A2 EP 89109761 A EP89109761 A EP 89109761A EP 89109761 A EP89109761 A EP 89109761A EP 0347619 A2 EP0347619 A2 EP 0347619A2
Authority
EP
European Patent Office
Prior art keywords
boiler
exhaust gas
gas
combustion chamber
burner
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.)
Withdrawn
Application number
EP89109761A
Other languages
German (de)
English (en)
Other versions
EP0347619A3 (fr
Inventor
Hans Dr. Viessmann
Heinrich Dörnbach
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.)
Viessmann Werke GmbH and Co KG
Original Assignee
Viessmann Werke GmbH and Co KG
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 Viessmann Werke GmbH and Co KG filed Critical Viessmann Werke GmbH and Co KG
Publication of EP0347619A2 publication Critical patent/EP0347619A2/fr
Publication of EP0347619A3 publication Critical patent/EP0347619A3/fr
Withdrawn legal-status Critical Current

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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
    • F24H1/24—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
    • F24H1/263—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 with a dry-wall combustion chamber
    • 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber

Definitions

  • the invention relates to a heating boiler for the combustion of liquid or gaseous fuels according to the preamble of the main claim.
  • Boilers of the type mentioned are generally known and in use and do not require any special printed evidence.
  • NOx content in the exhaust gases which pollutes the environment in addition to other harmful gas components
  • branch off some of the exhaust gases to feed them back to the burner and to add them to the combustion air.
  • this has been done so far by providing an outer, well heat-insulated line outside the boiler, which connects the gas discharge area of the boiler to the suction side of the burner fan housing. The heat insulation of this line is necessary so that the branched exhaust gas portion does not cool down too much.
  • the invention is based on the object of designing and improving such a boiler in such a way that such an external return line is dispensed with and the exhaust gas recirculation is effected with the simplest means can.
  • the arrangement of an external exhaust gas recirculation line is therefore advantageously eliminated, and with it the connection difficulty of this line to the fan burner housing. If such boilers are provided with a firebox lock door, no special measures need to be taken to be able to open the lock door unimpeded. Since the entire exhaust gas recirculation takes place within the boiler, there is also advantageously no need for complex insulation measures for an exhaust gas recirculation line. Regardless of the particular type of boiler, the exhaust gas recirculation path is also extremely short in comparison to a recirculation through an external recirculation line.
  • the overflow opening is advantageously provided with an adjustable diaphragm.
  • the support disc on the overflow channel side of the impeller wheel of the burner fan is provided with at least one overflow opening in the center area, so that the intake area of the impeller wheel also on that side air-modified side effective who that can.
  • the impeller of the burner fan can also be designed such that its carrier disc is also covered with impeller blades on the overflow channel side, which provides suction areas on both sides of the impeller, namely once for the air to be drawn in and once for the exhaust part to be drawn in. The required air-exhaust gas mixture then takes place behind the impeller.
  • the heating boiler in such a way that the gas outlet connection of the boiler is connected in the burner-side area of the boiler housing to an exhaust gas collecting space, which is preferably designed as an annular channel.
  • This design of the boiler results in an extremely short path for the exhaust gas to be branched off, since the exhaust gas collection space and the blower housing are assigned directly adjacent to one another, which will be explained in more detail below.
  • the exhaust gas recirculation principle according to the invention within the boiler can also be implemented on heating boilers which are equipped with a pot-like reversing combustion chamber in the combustion chamber, the extraction path of which is formed by a heating gas duct surrounding the reversing combustion chamber and possibly divided by longitudinal ribs in individual trains.
  • an exhaust gas inflow channel reaching through the hot gas draft channel at least up to its outflow end is connected to the exhaust gas overflow opening, the exhaust gas inflow channel being arranged in the lower region of the hot gas draft channel.
  • At least one of the lower individual trains delimited by longitudinal ribs is designed as an exhaust gas inflow channel which is connected to the exhaust gas overflow channel. This is also explained in more detail. Both the one and the other embodiment are easily possible subsequently on existing and corresponding boiler designs.
  • the exhaust gas overflow opening is arranged in the combustion chamber closure door.
  • a filter such as filters made of steel mesh or steel wool or the like, can advantageously be exchangeably arranged upstream of the exhaust gas overflow channel. If the exhaust gas overflow channel is located in the boiler lock door, which, as mentioned, applies in the majority of cases, this filter is accessible immediately when the combustion chamber lock door is opened and can be replaced without any problems.
  • the inflow-side inflow region of the filter is expediently designed to be larger than it corresponds to the cross section of the overflow channel, which can counteract too rapid clogging of the filter.
  • an embodiment is preferably provided.
  • these heating boilers consist of a water-carrying housing 1, in which a combustion chamber 2 with a gas discharge duct S leading to the gas discharge nozzle 3 and the housing of a forced draft burner are arranged in front of the combustion chamber.
  • a combustion chamber 2 with a gas discharge duct S leading to the gas discharge nozzle 3 and the housing of a forced draft burner are arranged in front of the combustion chamber.
  • FIG. 1 it should be pointed out that it can also be installed with a horizontal arrangement with respect to its longitudinal axis.
  • an exhaust gas overflow opening 9 is arranged between the vacuum region 6 located opposite the air intake side of the rotor chamber 7 of the fan housing 4 and the burner-side end region 8 of the combustion chamber 2, which connects the rotor chamber 7 to the end region S 'of the gas extraction section S in the boiler , wherein the impeller 12 of the fan is designed to be suction-effective on the overflow channel side.
  • the overflow opening 9 can be provided with an adjustable diaphragm 10, which can also be appropriately arranged in the embodiment according to FIG. 3.
  • the fan housing 4 of the fan burner is only indicated schematically in both cases, that is, on the representation of structural details regarding the fuel and air feeding is dispensed with.
  • the support disk 11 of the impeller 12 on the overflow channel is provided with at least one overflow opening 13 in the central region, ie the suction effect of the impeller 12 is also through the overflow openings 13 effective with respect to the overflow opening 9.
  • FIG. 2 Another embodiment of the rotor wheel 12 is illustrated in FIG. 2, in which the carrier disk 11 of the rotor wheel is also covered with rotor blades 14 on the overflow channel side.
  • Such double-sided effective impellers are known, but not in connection with sucking in an exhaust gas flow to be recirculated.
  • the exhaust gas overflow opening 9 is advantageously arranged directly in the combustion chamber closure door 19.
  • the flue gas overflow opening 9 would be designed as a passage passage through the water-bearing closure wall in the burner area and with the same stipulation that the mouth of this overflow channel seals a corresponding opening in the blower housing and is flush with it.
  • combustion chamber B is not a reversing combustion chamber as in the case of the boiler according to FIG. 3, but a combustion chamber open at the bottom with a heating gas duct or exhaust gas section S, as with Arrows indicated.
  • the exhaust pipe 3 is located in the burner-side area of the boiler housing 1 and is connected there to an exhaust gas collecting space 1 ', which, as shown, forms an annular channel and is closed off from the outside by the combustion chamber door 19 is, on the other hand, as shown and known, the fan housing 4 sits directly with its wall 4 '.
  • a filter 20 is expediently interchangeably arranged upstream of the exhaust gas overflow opening 9. This filter 20 is advantageously made larger in terms of its inflow area than it corresponds to the cross section of the overflow opening 9.
  • an exhaust gas inflow opening 9 ' is connected to the exhaust gas overflow opening 9 at least up to its outflow-side end 18, the exhaust gas inflow opening 9' being arranged in the lower region of the heating gas intake duct.
  • This exhaust gas inflow channel 9 ' is suitably sealed to the exhaust gas overflow opening 9 in the shutter door 19, which is not shown in detail.
  • this boiler as shown and better seen in Fig. 4, is divided by longitudinal ribs 16 into individual cables 17, the lowest individual cable 17 can simply be used as an exhaust gas inflow channel 9 'by using the two longitudinal ribs 16' limiting this channel 9 with a cover plate 17 'closes at the top. If these longitudinal ribs do not also capture the overflow chamber 21 on the burner side, which is often the case, a corresponding intermediate channel piece 22 is provided there, which establishes the connection to the exhaust gas overflow opening 9 in the closure cap 19.
  • This intermediate channel piece 22 can be formed with the cover plate 17 'from a uniform sheet metal blank.
  • an exhaust gas intake pipe 23 is connected to the overflow opening 9, which projects with its other end 24 into the gas discharge nozzle and points with its suction opening 25 in the outflow direction, as shown in FIG. 5. If the overflow opening 9 is located in a swiveling boiler lock door, it is easily possible to arrange the connecting pipe 23 stationary, at the connection opening of which the overflow opening 9 fits tightly when the lock door 8 is closed.

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)
  • Incineration Of Waste (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP19890109761 1988-06-18 1989-05-30 Chaudière pour la combustion de combustibles liquides ou gazeux Withdrawn EP0347619A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3820671 1988-06-18
DE19883820671 DE3820671A1 (de) 1988-06-18 1988-06-18 Heizungskessel fuer die verbrennung fluessiger oder gasfoermiger brennstoffe

Publications (2)

Publication Number Publication Date
EP0347619A2 true EP0347619A2 (fr) 1989-12-27
EP0347619A3 EP0347619A3 (fr) 1991-07-31

Family

ID=6356766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890109761 Withdrawn EP0347619A3 (fr) 1988-06-18 1989-05-30 Chaudière pour la combustion de combustibles liquides ou gazeux

Country Status (2)

Country Link
EP (1) EP0347619A3 (fr)
DE (1) DE3820671A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428117A2 (fr) * 1989-11-16 1991-05-22 VIESSMANN WERKE GmbH & CO. Chaudière avec recirculation des gaz d'échappement vers le brûleur
EP0453639A2 (fr) * 1990-04-24 1991-10-30 Hans Dr. Viessmann Brûleur soufflant à huile ou à gaz
AT396821B (de) * 1990-03-21 1993-12-27 Vaillant Gmbh Öl- oder gas-gebläsebrenner
DE4400686C1 (de) * 1994-01-12 1995-06-22 Elco Kloeckner Heiztech Gmbh Verbrennungsgasführung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928384A1 (de) * 1989-08-28 1991-03-21 Viessmann Hans Geblaesebrenner fuer heizkessel mit abgasrueckfuehrung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370235A1 (fr) * 1976-11-05 1978-06-02 Interliz Anstalt Chaudiere comprenant un generareur de gaz chaud pour combustibles liquides ou gazeux
WO1987000910A1 (fr) * 1985-08-09 1987-02-12 Komfortventilation Teknik Ab Amenagement dans une chaudiere de chauffage central
DE8708656U1 (de) * 1987-04-21 1988-08-18 Weishaupt, Siegfried, Dipl.-Ing., 7958 Laupheim Heizkessel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8716240U1 (de) * 1987-12-09 1988-01-28 Buderus Heiztechnik GmbH, 6330 Wetzlar Gliederheizkessel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370235A1 (fr) * 1976-11-05 1978-06-02 Interliz Anstalt Chaudiere comprenant un generareur de gaz chaud pour combustibles liquides ou gazeux
WO1987000910A1 (fr) * 1985-08-09 1987-02-12 Komfortventilation Teknik Ab Amenagement dans une chaudiere de chauffage central
DE8708656U1 (de) * 1987-04-21 1988-08-18 Weishaupt, Siegfried, Dipl.-Ing., 7958 Laupheim Heizkessel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428117A2 (fr) * 1989-11-16 1991-05-22 VIESSMANN WERKE GmbH & CO. Chaudière avec recirculation des gaz d'échappement vers le brûleur
EP0428117A3 (en) * 1989-11-16 1991-07-17 Viessmann Werke Gmbh & Co. Boiler with exhaust gas recirculation to the burner
AT396821B (de) * 1990-03-21 1993-12-27 Vaillant Gmbh Öl- oder gas-gebläsebrenner
EP0453639A2 (fr) * 1990-04-24 1991-10-30 Hans Dr. Viessmann Brûleur soufflant à huile ou à gaz
EP0453639A3 (en) * 1990-04-24 1992-03-04 Hans Dr. Viessmann Oil or gas power burner
DE4400686C1 (de) * 1994-01-12 1995-06-22 Elco Kloeckner Heiztech Gmbh Verbrennungsgasführung

Also Published As

Publication number Publication date
DE3820671A1 (de) 1989-12-21
EP0347619A3 (fr) 1991-07-31

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