EP0466207B1 - Low temperature heating boiler - Google Patents

Low temperature heating boiler Download PDF

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Publication number
EP0466207B1
EP0466207B1 EP91115427A EP91115427A EP0466207B1 EP 0466207 B1 EP0466207 B1 EP 0466207B1 EP 91115427 A EP91115427 A EP 91115427A EP 91115427 A EP91115427 A EP 91115427A EP 0466207 B1 EP0466207 B1 EP 0466207B1
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Prior art keywords
heating
temperature
boiler
low temperature
combustion chamber
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Expired - Lifetime
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EP91115427A
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German (de)
French (fr)
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EP0466207A1 (en
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Richard Müller
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    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • F24H9/0031—Guiding means in combustion gas channels with means for changing or adapting the path of the flue gas
    • 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
    • F24H1/285—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 the fire tubes arranged alongside the combustion chamber
    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0036—Dispositions against condensation of combustion products

Definitions

  • the invention relates to a low-temperature heating boiler with a combustion chamber (1) receiving the burner, a downstream heating gas train (3) ending in the exhaust pipe and a surrounding boiler water jacket which is divided into an inner and an outer circuit, which are connected to one another, at least one of the Connections has a temperature-controlled valve that sets the inner circuit to a high and the outer circuit to a low temperature, and both circuits are provided with flow and return connections.
  • a boiler is known from DE-A-3510 679.
  • low-temperature boilers of the generic type are used. Their basic task is to give off the gas or oil introduced and ignited via the burner as heat to the surrounding boiler water and to feed it into the heating system.
  • more and more low-temperature boilers have been used recently, in which the boiler water is kept at a comparatively low temperature in order to reduce heat losses.
  • the boiler temperature is controlled so that it comes to lie above the dew point of the heating gases.
  • correspondingly complex measures must be taken.
  • the invention has developed further of low-temperature boilers, in which condensation is avoided and at the same time optimal energy utilization is possible.
  • This object is achieved according to the invention in that, in addition to the heating gas flue located above and / or below the combustion chamber, viewed in the direction of flow, additional heating gas flues are connected upstream and in that the boiler jacket is insulated and has a double-shell design between the inner and outer circuits.
  • the boiler water jacket surrounding the combustion chamber and partially the heating gas flue is double-shelled and divided into a primary (inner) and secondary (outer) area, which are connected to one another via (at least) two openings.
  • at least one of the connections is provided with a temperature-controlled valve which is set such that the balance between the primary and secondary circuit can only be incomplete, so that the primary circuit is set and maintained at a much higher level than the secondary one.
  • Such a double-shell boiler water jacket construction has the advantage that condensation is avoided, Optimal energy utilization takes place and both high-temperature water can be provided by drawing from the primary circuit and low-temperature water from the secondary.
  • the highly heated water is connected, for example, to high-temperature devices such as process water and boilers, and the low-temperature water to the radiators. From an energetic point of view it is an advantage that only a small part of the water is kept at a comparatively high temperature and at the same time the energy losses can be minimized by the surrounding second shell of the boiler water jacket of low temperature. There is only immediate heating of the primary circuit, which releases part of its medium to the secondary circuit via the temperature-controlled valve.
  • the low-temperature heating boiler shown consists of a combustion chamber (1) in which the burner (2) is located and in which the heating gases flowing out according to the arrows are formed by combustion.
  • An inner tube (5) and an outer tube (6) are arranged coaxially in both the annular space (4) and the main heating gas train (3) to form the auxiliary heating gas trains (5), the inside in the main heating gas train (3) and the outside (6) engages in the annular space (4) at a distance from the outer walls.
  • Another possibility, not shown here, is to close the flap (8) by opening the flap (9) closing the end face of the inner tube (5). Then the heating gases coming from the combustion chamber (1) flow directly and completely into the interior of the tube (5) and are conducted directly from there to the outside. The heat recovery is then naturally comparatively low.
  • the boiler water jacket is divided into a primary circuit and a secondary circuit.
  • the primary circuit which operates at a higher temperature, surrounds the combustion chamber (1), the (main) heating gas flue (3) and the auxiliary heating gas flues formed by the annular space (4). Only the primary circuit is then immediately heated.
  • an opening (12) is provided, which is realized in the form of a nozzle (13) which in turn engages in a nozzle (14) acted upon by the medium of the secondary circuit.

Abstract

To reduce condensation, it is proposed in the case of low temperature heating boilers to carry off the heating gases through a heating gas flue 3 and additional auxiliary heating gas flues which are closed by flaps and have a positive control by means of which, provided that one flap is open, the other is closed. <IMAGE>

Description

Die Erfindung betrifft einen Niedertemperaturheizkessel mit einer den Brenner aufnehmenden Brennkammer (1), einem nachgeschalteten, im Abgasrohr endenden Heizgaszug (3) und einem umgebenden Kesselwassermantel, der in einen inneren und einen äußeren Kreislauf unterteilt ist, die miteinander verbunden sind, wobei mindestens eine der Verbindungen ein temperaturgesteuertes Ventil aufweist, das den inneren Kreislauf auf einer hohen und den äußeren Kreislauf auf einer niederen Temperatur einstellt, und wobei beide Kreisläufe mit Vor- und Rücklaufanschlüssen versehen sind. Ein derartiger Kessel ist durch die DE-A-3510 679 bekannt.The invention relates to a low-temperature heating boiler with a combustion chamber (1) receiving the burner, a downstream heating gas train (3) ending in the exhaust pipe and a surrounding boiler water jacket which is divided into an inner and an outer circuit, which are connected to one another, at least one of the Connections has a temperature-controlled valve that sets the inner circuit to a high and the outer circuit to a low temperature, and both circuits are provided with flow and return connections. Such a boiler is known from DE-A-3510 679.

Bei den bekannten Zentralheizungsanlagen werden Niedertemperaturheizkessel der gattungsgemäßen Art eingesetzt. Ihre grundsätzliche Aufgabe besteht darin, das über den Brenner eingebrachte und gezündete Gas oder Öl als Wärme an das umgebende Kesselwasser abzugeben und in die Heizungsanlage einzuspeisen. Aus Gründen der Verbesserung der Energieausnutzung werden in jüngster Zeit immer mehr Niedertemperaturheizkessel eingesetzt, bei denen zur Verminderung der Wärmeverluste das Kesselwasser auf einer vergleichsweise niedrigen Temperatur gehalten wird. Zur Erreichung einer hohen Lebensdauer ist von ausschlaggebender Bedeutung, daß eine Kondensation der Heizgase nicht eintritt. Bei Normaltemperaturkesseln wird zu diesem Zweck die Kesseltemperatur so gesteuert, daß sie oberhalb des Taupunktes der Heizgase zu liegen kommt. Bei Niedertemperaturkesseln hingegen müssen entsprechend aufwendige Vorkehrungen getroffen werden.In the known central heating systems, low-temperature boilers of the generic type are used. Their basic task is to give off the gas or oil introduced and ignited via the burner as heat to the surrounding boiler water and to feed it into the heating system. In order to improve energy efficiency, more and more low-temperature boilers have been used recently, in which the boiler water is kept at a comparatively low temperature in order to reduce heat losses. To achieve a long service life, it is crucial that the heating gases do not condense. In normal temperature boilers, the boiler temperature is controlled so that it comes to lie above the dew point of the heating gases. In the case of low-temperature boilers, on the other hand, correspondingly complex measures must be taken.

Hiervon ausgehend hat sich die Erfindung die Weiterentwicklung von Niedertemperaturheizkesseln zur Aufgabe gemacht, bei denen Kondensation vermieden und gleichzeitig eine optimale Energieausnutzung möglich wird.Proceeding from this, the invention has developed further of low-temperature boilers, in which condensation is avoided and at the same time optimal energy utilization is possible.

Gelöst wird diese Aufgabe gemäß der Erfindung dadurch, daß neben dem oberhalb und/oder unterhalb der Brennkammer befindlichen Heizgaszug, in Strömungsrichtung gesehen, zusätzlich Nebenheizgaszüge vorgeschaltet sind und daß der Kesselmantel zwischen dem inneren und dem äußeren Kreislauf isoliert und doppelschalig ausgebildet ist.This object is achieved according to the invention in that, in addition to the heating gas flue located above and / or below the combustion chamber, viewed in the direction of flow, additional heating gas flues are connected upstream and in that the boiler jacket is insulated and has a double-shell design between the inner and outer circuits.

Der die Brennkammer und teilweise den Heizgaszug umgebende Kesselwassermantel ist zweischalig und in einen primären (inneren) und sekundären (äußeren) Bereich unterteilt, die über (mindestens) zwei Öffnungen untereinander in Verbindung stehen. Im Sinne der Erfindung ist wenigstens eine der Verbindungen mit einem temperaturgesteuerten Ventil versehnen, welches so eingestellt ist, daß der Ausgleich zwischen primärem und sekundärem Kreislauf nur unvollständig erfolgen kann, so daß der primäre Kreislauf auf einer wesentlich höheren als der sekundäre eingestellt und gehalten wird.The boiler water jacket surrounding the combustion chamber and partially the heating gas flue is double-shelled and divided into a primary (inner) and secondary (outer) area, which are connected to one another via (at least) two openings. For the purposes of the invention, at least one of the connections is provided with a temperature-controlled valve which is set such that the balance between the primary and secondary circuit can only be incomplete, so that the primary circuit is set and maintained at a much higher level than the secondary one.

Eine derartige zweischalige Kesselwassermantelkonstruktion hat zum Vorteil, daß Kondensation vermieden, optimale Energieausnutzung erfolgen und sowohl hochtemperiertes Wasser durch Entnahme aus dem primären Kreislauf als auch niedertemperiertes Wasser aus dem sekundären bereitstellbar ist. Das hocherwärmte Wasser wird beispielsweise an Hochtemperaturgeräte wie Brauchwasser und Boiler und das niedertemperierte Wasser an die Heizkörper angeschlossen. Unter energetischen Gesichtspunkten ist als Vorteil anzusehen, daß nur ein geringer Teil des Wassers auf einer vergleichsweise hohen Temperatur gehalten und gleichzeitig durch die umgebende zweite Schale des Kesselwassermantels von niederer Temperatur die Energieverluste minimiert werden können. Es erfolgt nur eine unmittelbare Erwärmung des primären Kreislaufes, der einen Teil seines Mediums über das temperaturgesteuerte Ventil an den sekundären Kreislauf abgibt. Durch die hohe Temperatur des primären Kreislaufes erhält man im Bereich der Wandungen der Brennkammer und des Heizgaszuges Temperaturverhältnisse, mit denen bei Normaltemperaturkesseln vergleichbar sind, die also oberhalb des Taupunktes liegen, so daß mit Sicherheit eine Kondensation der Heizgase ausgeschlossen ist. Als Folge davon ergibt sich eine vergleichsweise hohe Lebensdauer.Such a double-shell boiler water jacket construction has the advantage that condensation is avoided, Optimal energy utilization takes place and both high-temperature water can be provided by drawing from the primary circuit and low-temperature water from the secondary. The highly heated water is connected, for example, to high-temperature devices such as process water and boilers, and the low-temperature water to the radiators. From an energetic point of view it is an advantage that only a small part of the water is kept at a comparatively high temperature and at the same time the energy losses can be minimized by the surrounding second shell of the boiler water jacket of low temperature. There is only immediate heating of the primary circuit, which releases part of its medium to the secondary circuit via the temperature-controlled valve. Due to the high temperature of the primary circuit, temperature conditions are obtained in the area of the walls of the combustion chamber and the heating gas flue, which are comparable with normal temperature boilers, which are above the dew point, so that condensation of the heating gases is excluded with certainty. As a result, the service life is comparatively long.

Einzelheiten und Vorteile der Erfindung lassen sich dem nachfolgenden Beschreibungsteil entnehmen, in dem anhand der Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert wird. Sie zeigt in schematischer Darstellung einen Querschnitt durch einen erfindungsgemäßen Niedertemperaturheizkessel in etwa entlang der Mittelachse.Details and advantages of the invention can be found in the following description, in which an embodiment of the invention is explained in more detail with reference to the drawing. It shows a schematic representation of a cross section through a low-temperature heating boiler according to the invention approximately along the central axis.

In an sich bekannter Weise besteht der gezeigte Niedertemperaturheizkessel aus einer Brennkammer (1), in der sich der Brenner (2) befindet und in der durch Verbrennung die entsprechend der Pfeile abströmenden Heizgase gebildet werden.In a manner known per se, the low-temperature heating boiler shown consists of a combustion chamber (1) in which the burner (2) is located and in which the heating gases flowing out according to the arrows are formed by combustion.

Unterhalb der Brennkammer (1) befinden sich der (Haupt-) Heizgaszug (3), durch den die Heizgase zu dem hier nicht dargestellten Abgasrohr sowie weiter zum Kamin geleitet werden. Es ist koaxial von einem zylindermantelförmigen Ringraum (4) umgeben, worin ein wesentlicher Kern vorliegender Ausführungsform besteht.Below the combustion chamber (1) there is the (main) heating gas flue (3) through which the heating gases are routed to the exhaust pipe (not shown here) and further to the chimney. It is coaxially surrounded by a cylindrical jacket-shaped annular space (4), which is an essential core of the present embodiment.

Zur Bildung der Nebenheizgaszüge (5) sind sowohl in den Ringraum (4) als auch den Hauptheizgaszug (3) koaxial ein inneres Rohr (5) und ein äußeres Rohr (6) angebracht, wobei das Innere in den Hauptheizgaszug (3) und das Äußere (6) in den Ringraum (4) in Abstand zu den Außenwänden eingreift.An inner tube (5) and an outer tube (6) are arranged coaxially in both the annular space (4) and the main heating gas train (3) to form the auxiliary heating gas trains (5), the inside in the main heating gas train (3) and the outside (6) engages in the annular space (4) at a distance from the outer walls.

Auf diese Weise entstehen Strömungskanäle, durch die die Heizgase entsprechend der Pfeile strömen können, in der Weise, daß zunächst entlang dem äußeren Rohr (6) eine Strömung stattfindet, die an ihrem äußeren Ende umgeleitet und zurückgeführt wird, an der die gemeinsame Verbindung herstellenden Stirnseite (7) wiederum umgelenkt und an der Außenseite des inneren Rohres (5) nach außen abgeführt wird. In der soeben beschriebenen Weise strömt das Heizgas bei Beaufschlagung der Nebenheizgaszüge, wie sie bei geöffneter zugehöriger Klappe (8) erfolgt.In this way flow channels are formed through which the heating gases can flow in accordance with the arrows, in such a way that initially a flow takes place along the outer tube (6), which is diverted and returned at its outer end, on the end face producing the common connection (7) again deflected and discharged to the outside on the outside of the inner tube (5). In the manner just described, the heating gas flows when the auxiliary heating gas flues are acted upon, as occurs when the associated flap (8) is open.

Eine andere, hier nicht gezeigte Möglichkeit besteht darin, die Klappe (8) zu schließen, dafür die die Stirnseite des Innenrohres (5) verschließende Klappe (9) zu öffnen. Dann strömen die von der Brennkammer (1) kommenden Heizgase unmittelbar und vollständig in das Innere des Rohres (5) ein und werden von dort direkt nach außen geleitet Die Wärmerückgewinnung ist dann naturgemäß vergleichsweise gering.Another possibility, not shown here, is to close the flap (8) by opening the flap (9) closing the end face of the inner tube (5). Then the heating gases coming from the combustion chamber (1) flow directly and completely into the interior of the tube (5) and are conducted directly from there to the outside. The heat recovery is then naturally comparatively low.

Der Kesselwassermantel ist in einen primären Kreislauf und einen sekundären Kreislauf unterteilt. Der auf einer höheren Temperatur arbeitende primäre Kreislauf umgibt die Brennkammer (1), den (Haupt-) Heizgaszug (3) sowie die durch den Ringraum (4) gebildeten Nebenheizgaszüge. Einzig der primäre Kreislauf wird dann unmittelbar erhitzt. Zur Erwärmung des sekundären Kreislaufes ist eine Öffnung (12) vorhanden, die in Form eines Stutzens (13) realisiert ist, der seinerseits in einen vom Medium des Sekundärkreislaufes beaufschlagten Stutzen (14) eingreift.The boiler water jacket is divided into a primary circuit and a secondary circuit. The primary circuit, which operates at a higher temperature, surrounds the combustion chamber (1), the (main) heating gas flue (3) and the auxiliary heating gas flues formed by the annular space (4). Only the primary circuit is then immediately heated. For heating the secondary circuit, an opening (12) is provided, which is realized in the form of a nozzle (13) which in turn engages in a nozzle (14) acted upon by the medium of the secondary circuit.

Claims (1)

  1. Low temperature heating boiler having a combustion chamber (1) housing the burner, a downstream heating-gas flue (3) ending in the exhaust pipe, and a surrounding boiler water jacket subdivided into an inner and an outer circuit which are connected together, whereby at least one of the connections has a temperature-controlled valve that adjusts the inner circuit to a higher temperature and the outer circuit to a lower temperature, whereby both circuits are provided with supply-and-return connections, wherein additional auxiliary heating-gas flues (4) are disposed upstream, as seen in the direction of flow, adjacent to the heating-gas flue above and/or below the combustion chamber, and the boiler jacket between the inner and outer circuit is insulated and double-layered.
EP91115427A 1988-04-21 1989-04-21 Low temperature heating boiler Expired - Lifetime EP0466207B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3813382 1988-04-21
DE3813382 1988-04-21
EP89904764A EP0365640B1 (en) 1988-04-21 1989-04-21 Low-temperature heating boiler

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP89904764.1 Division 1989-04-21

Publications (2)

Publication Number Publication Date
EP0466207A1 EP0466207A1 (en) 1992-01-15
EP0466207B1 true EP0466207B1 (en) 1996-01-31

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ID=6352531

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89904764A Expired - Lifetime EP0365640B1 (en) 1988-04-21 1989-04-21 Low-temperature heating boiler
EP91115427A Expired - Lifetime EP0466207B1 (en) 1988-04-21 1989-04-21 Low temperature heating boiler

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Application Number Title Priority Date Filing Date
EP89904764A Expired - Lifetime EP0365640B1 (en) 1988-04-21 1989-04-21 Low-temperature heating boiler

Country Status (5)

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EP (2) EP0365640B1 (en)
JP (1) JPH02503949A (en)
AT (1) ATE133776T1 (en)
DE (2) DE58909592D1 (en)
WO (1) WO1989010519A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2156689B1 (en) * 1998-12-11 2002-02-01 Vulcano Sadeca S A HOT WATER GENERATOR FOR LOW TEMPERATURE OPERATION.
FI20035130A (en) * 2003-08-05 2005-02-06 Oilon Internat Oy Method and device to facilitate start of burner
CN111023569A (en) * 2019-11-07 2020-04-17 赵素真 Circulating condensation boiler

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2341852A (en) * 1942-10-13 1944-02-15 George D Arnold Water heater
BE747417A (en) * 1969-02-06 1970-08-31 Boilers Ltd IMPROVEMENTS TO INDUSTRIAL BOILERS
DE3329777A1 (en) * 1983-08-18 1985-03-07 Georg Fischer GmbH & Co Maschinen- u. Kesselfabrik, 8870 Günzburg Heating boiler for liquid and gaseous fuels
DE3411437A1 (en) * 1984-03-28 1985-12-12 Werner 8056 Neufahrn Münz Guidance of fuel (heating) gas in condensing apparatuses
AT384884B (en) * 1984-04-10 1988-01-25 Babcock Werke Ag SPRAYER FOR A HEAVY OIL BURNER
DE3510679A1 (en) * 1985-03-23 1986-09-25 Buderus Ag, 6330 Wetzlar Heating boiler
DE3604842A1 (en) * 1986-02-15 1987-08-20 Kloeckner & Co Kgaa Zweigniede Heating boiler

Also Published As

Publication number Publication date
DE58900919D1 (en) 1992-04-09
EP0466207A1 (en) 1992-01-15
EP0365640B1 (en) 1992-03-04
EP0365640A1 (en) 1990-05-02
ATE133776T1 (en) 1996-02-15
JPH02503949A (en) 1990-11-15
DE58909592D1 (en) 1996-03-14
WO1989010519A1 (en) 1989-11-02

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