EP1102012B1 - De-gasing installation - Google Patents

De-gasing installation Download PDF

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Publication number
EP1102012B1
EP1102012B1 EP20000124818 EP00124818A EP1102012B1 EP 1102012 B1 EP1102012 B1 EP 1102012B1 EP 20000124818 EP20000124818 EP 20000124818 EP 00124818 A EP00124818 A EP 00124818A EP 1102012 B1 EP1102012 B1 EP 1102012B1
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EP
European Patent Office
Prior art keywords
heating water
installation
water circulation
container
degasing
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EP20000124818
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German (de)
French (fr)
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EP1102012A2 (en
EP1102012A3 (en
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Anton Eder
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Individual
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Priority to SI200030907T priority Critical patent/SI1102012T1/en
Priority to AT00124818T priority patent/ATE338251T1/en
Publication of EP1102012A2 publication Critical patent/EP1102012A2/en
Publication of EP1102012A3 publication Critical patent/EP1102012A3/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/08Arrangements for drainage, venting or aerating
    • F24D19/082Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/083Venting arrangements

Definitions

  • the invention relates to a Walkeringernikonne with a degassing device connected to this for the heating water of Edelwassernikankonnes, which connected to a Walkeringerniklauf via a supply line and at least one valve container in which the heating water is under a much lower pressure than in Walkerworth mobilislauf, and a return pump for Returning the heating water from the container has in the Edelwasserniklauf.
  • Devices of this type are known and serve in particular to partially remove dissolved oxygen in the heating water in order to reduce the corrosion of the elements of the heating circuit.
  • a degassing for the heating water of Schuziernikonnes is known in which initially a flash tank is filled with pressurized heating water, then the expansion tank is separated by valves from the heating circuit and by opening a vent valve, the pressure in the flash tank to atmospheric pressure is lowered, whereby the heating water in the expansion tank is relaxed and a portion of the dissolved gas is released and escapes.
  • a heating circuit is further known with a boiler, a circulation pump and radiators to which a pressure equalization line is connected.
  • the heating medium in particular the heating water yes changed depending on the temperature of its volume not insignificant.
  • liquids are incompressible.
  • the pressure of the heating medium in the actual heating circuit should always be kept at the same level, regardless of the respective temperature of the heating medium.
  • This is an expansion vessel with a gas cushion connected to the pressure equalization line, which has two parallel line branches between the expansion tank and the actual heating circuit, wherein in a line branch, a pump is provided, which is controlled by a pressure sensor in the heating circuit, and a non-return valve in the other line branch is a pressure control valve.
  • no measures are provided here. Although it is connected to the aforementioned pressure equalization line end still an open container as a reservoir via a non-descript conduit member, but so that the heating medium can not be degassed.
  • the device according to US-PS 5 007 583 serves the same purpose as the above-discussed device according to said GB-OS 2 209 594, although in another circuit arrangement.
  • the expansion vessel is connected here via a siphon-like closure with the atmosphere.
  • the water contained in these siphon-like closures evaporates very quickly, so that the expansion vessel is directly in communication with the atmosphere.
  • reaching from the actual heating circuit in the expansion vessel water is relaxed at first, since it is here exposed to a much lower pressure than in a closed circuit, due to the direct connection with the atmosphere takes the heating medium but very quickly back to oxygen out of the air.
  • the object of the invention is in contrast to provide a Schumacherniklauf with a connected thereto degassing of the type mentioned, through which a greater part of the dissolved gas in the liquid can be removed from this and according to the invention succeeds in that in the flow path of the heating water between the Edelwasserniklauf and the container, a baffle device is provided, which comprises a chamber into which an injection nozzle extends, which opens in front of a baffle surface on which the passing of the injector water jet of the Schuwasserniklauf bouncing to the container flowing heating water, the mouth of the injection nozzle is smaller than the discharge opening from the chamber.
  • a degassing device In a degassing device according to the invention is carried out in the baffle a strong turbulence of the heating water with simultaneous sudden relaxation. By combining these influences on the water, the dissolved gases can dissolve to a much greater extent from the liquid and form gas bubbles. These can then collect and emerge from the heating water in the container in which the heating water is under a much lower pressure than in the heating circuit.
  • a degassing device with a baffle device which is installed directly in the heating circuit, is further known from DE 2624 336 A1.
  • this baffle system pressure is present, so that although a turbulence of the water, but not a simultaneous relaxation occurs.
  • the effectiveness of degassing is much lower in this device than in the device according to the invention.
  • the baffle of the degassing device according to the invention seen in the direction of the flow path, is concave.
  • the turbulence and surface enlargement of the water is enhanced.
  • a cooling device is located in the flow path of the heating water between the heating circuit and the container. This is conveniently located immediately after the baffle device. As a result, the possibility that the degassed air goes into solution again, substantially reduced.
  • FIG. 1 An illustrated schematically in Fig. 1 Walkerwasserniklauf has in a known manner a flow line 31, in which a pump 35 is arranged, one or more consumers 33, a return line 32 and a boiler or heat generator 34.
  • the degassing device according to the invention is connected to the Schuwassserniklauf 30 via two lines 11, 36.
  • the two lines 11, 36 can be shut off via shut-off valves 1.
  • the supply line 11 leads to a structural unit 37, which is further connected to a fresh water supply 10 and which has a line 12 as the output.
  • the assembly 37 is shut off via shut-off valves 1 from the input and output lines 11, 36, 12.
  • the by a microprocessor controller 13 controllable valve 5 is used to start and stop a degassing process for heating water from Schuzierniksburg 30.
  • a liquid flow is adjusted, which is independent of the system pressure in Schuntzniksburg 30. Regardless of this system pressure, which is different depending on the heating circuit 30 and is usually above 1.5 bar, thereby uniform conditions for degassing are created.
  • the flow monitor 7, the state of which can be interrogated by the control device 13, serves to control the operating state. When the valve 5 is open, a flow must be reported by the flow monitor 7, otherwise there is a malfunction, which is output by the controller 13 as an alarm. Conversely, when the valve is closed 5 (or 4) from the flow switch 7 no flow may be reported.
  • the baffle 8 comprises a chamber 40 into which an injection nozzle 41 extends.
  • the injection nozzle 41 opens in front of a baffle 42 on which the water jet passing from the injection nozzle 41 strikes.
  • a baffle plate as impact surface.
  • a concave or cup-shaped design of the baffle surface viewed in the direction of the flow path, is preferred, thereby further increasing its efficiency.
  • the emerging from the injector, striking the baffle 42 heating water is suddenly relaxed in this process and strongly swirled and then flows laterally around the baffle 42 to the discharge line 43, the Cross-section is substantially larger than the mouth opening of the injection nozzle 41.
  • the cooling device 9 is provided, which is formed here by a helical conduit made of a thermally conductive material.
  • the heating water which carries the gas bubbles 44, passes on via the lines 12 and 24 in the container 29, in a container disposed in this butyl rubber bladder 28.
  • the rubber bladder 28 is connected via a pressure relief valve 26 with Atmospheric pressure connected, wherein the pressure relief valve 26 opens at a low pressure, which is less than 1 bar, preferably 0.5 bar or less. This slight overpressure is necessary so that the basic tension of the rubber bubble 28 is overcome by the inflowing heating water.
  • the heating water is thus practically unpressurized in the container 29 or in the rubber bladder 28 arranged therein, and the gas bubbles entrained by the incoming heating water can rise in the rubber bladder 28 and escape through the overpressure valve 26.
  • the sucked by the pump 19 from the container 29 heating water flows through line 25 and disposed therein check valve 21 and check valve 20 in the pump 19 and passes through a throttle valve 18 and a strainer 15 via the line 36 back into the heating circuit 30.
  • Die Control of the pump 19 by the control device 13 takes place as a function of the value given by the pressure sensor 16, by which the system pressure is fixed.
  • the container 29 further serves as a so-called expansion tank.
  • This expands, wherein the pressure in the heating circuit increases above a maximum value.
  • This opens an overflow regulator 17 (proportional to the overpressure), via which the container 29 or the rubber bubble 28 arranged therein is connected to the heating water circuit 30.
  • this overflow regulator 17 it would also be possible for this overflow regulator 17 to lie parallel to the degassing valve 5 or to be completely omitted by the control device 13 if the degassing valve 5 is controlled accordingly, with an overpressure from the control device in each case is discharged via the degassing valve 5.
  • the heating water in the heating water circuit 30 cools down, its volume decreases again. This decrease in volume is manifested by a pressure drop indicated by the pressure sensor 16. From the control device 13, the pump 19 is then taken to increase the system pressure in operation. Usually, the pumping volume of the pump 19 is substantially greater than would be necessary to compensate for the volume loss due to the cooling of the heating water in the heating circuit 30. In conventional expansion devices therefore opens at start-up of the pump 19, the spill 17, and a majority of funded by the pump heating water passes through the spill 17 back into the container 29.
  • the degassing according to the invention is preferably a degassing process simultaneously with a tarnishing Pump 19 (due to a too low system pressure) carried out, for which purpose the valve 5 is opened and only a short period before switching off the pump 19 is closed again.
  • This combination of the degassing process with the Schumachernachspeisung results in a significant energy savings.
  • the parts surrounded by the dashed lines 38 and 39 are preferably designed as structural units.
  • the microprocessor controller 13 calculates the Schuzierstand in the container 29. Since minor leaks in the heating system are always present, it comes to a certain time over time As soon as this liquid level has fallen below a predetermined minimum value, the valve 4 is actuated by the control device 13 in order to supply new heating water into the rubber bubble 28 in the container 29 via the fresh water supply 10 refill.
  • a pressure reducer 2 for lowering the water pressure in the range of the system pressure of the heating circuit 30 and an electronic water meter 3 is provided in the fresh water supply line. Due to the required make-up quantities of heating water can be determined whether it is a loss of volume due to normal leaks and due to gas excretion through the degassing or an extraordinary loss of water, which occurs for example due to a pipe break.
  • the refilled fresh water is further supplied via the flow monitor 7 of the baffle device 8, before it enters the container 29. In this way, an effective degassing of the nachgespeisten heating water is already achieved during the refilling of fresh water.
  • the supply line 11 to the degassing is removed via the heating water for degassing, branches in the illustrated embodiment of the return line 32 of Schumacherniklaufes 30 from. It would also be possible to pre-view this discharge at the feed line 31, wherein the heating water supplied to the degassing device may however not have higher temperatures than 90 ° Celsius. This could be monitored by appropriate sensors, also suitable Abkühlgefäße could be connected upstream.
  • a degassing which in particular the baffle device 8, the cooling device 9, the container 29 with the rubber bladder 28 and the pump 19 includes
  • a pressure maintaining device spill 17, container 29 with rubber bladder 28 and pump 19
  • a Frischwassernachspeisung pressure reducer 2, water meter 3 and valve 4
  • the degassing device independently of a pressure stabilizer and / or a make-up device for fresh water.
  • a heat exchanger could be provided, through which the heat of the heating water to be degassed is discharged to the flowing back from the container into the heating circuit degassed heating water.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Physical Water Treatments (AREA)

Description

Die Erfindung betrifft einen Heizwasserkreislauf mit einer mit diesem verbundenen Entgasungseinrichtung für das Heizwasser eines Heizwasserkreislaufes, welche einen mit dem Heizwasserkreislauf über eine Zuführungsleitung und mindestens ein Ventil verbundenen Behälter, in dem das Heizwasser unter einem wesentlich geringeren Druck steht als im Heizwasserkreislauf, und eine Rückführpumpe zur Rückführung des Heizwassers aus dem Behälter in den Heizwasserkreislauf aufweist.The invention relates to a Heizwasserkreislauf with a degassing device connected to this for the heating water of Heizwasserkreislaufes, which connected to a Heizwasserkreislauf via a supply line and at least one valve container in which the heating water is under a much lower pressure than in Heizwasserkreislauf, and a return pump for Returning the heating water from the container has in the Heizwasserkreislauf.

Einrichtungen dieser Art sind bekannt und dienen insbesondere dazu, im Heizwasser gelösten Sauerstoff teilweise zu entfernen, um die Korrosion von den Elementen des Heizkreises zu verringern.Devices of this type are known and serve in particular to partially remove dissolved oxygen in the heating water in order to reduce the corrosion of the elements of the heating circuit.

Aus der AT 400 191 B ist beispielsweise eine Entgasungseinrichtung für das Heizwasser eines Heizwasserkreislaufes bekannt, bei der zunächst ein Entspannungsbehälter mit unter Druck stehendem Heizwasser befüllt wird, anschließend der Entspannungsbehälter über Ventile vom Heizkreis getrennt wird und durch Öffnen eines Entlüftungsventiles der Druck im Entspannungsbehälter auf Atmosphärendruck abgesenkt wird, wodurch das im Entspannungsbehälter befindliche Heizwasser entspannt wird und ein Teil des darin gelösten Gases frei wird und entweicht.From the AT 400 191 B, for example, a degassing for the heating water of Heizwasserkreislaufes is known in which initially a flash tank is filled with pressurized heating water, then the expansion tank is separated by valves from the heating circuit and by opening a vent valve, the pressure in the flash tank to atmospheric pressure is lowered, whereby the heating water in the expansion tank is relaxed and a portion of the dissolved gas is released and escapes.

Aus der GB-OS 2209 594 ist weiters ein Heizkreislauf bekannt mit einem Kessel, einer Umlaufpumpe und Radiatoren, an welchem eine Druckausgleichsleitung angeschlossen ist. Das Heizmedium, insbesondere das Heizwasser verändert ja in Abhängigkeit der Temperatur sein Volumen nicht unerheblich. Darüber hinaus sind Flüssigkeiten inkompressibel. Mit der hier beschriebenen und geoffenbarten Einrichtung soll der Druck des Heizmediums im eigentlichen Heizkreislauf stets auf dem selben Maß gehalten werden, unabhängig von der jeweiligen Temperatur des Heizmediums. Dazu ist ein Ausdehnungsgefäß mit einem Gaspolster an der Druckausgleichsleitung angeschlossen, welche zwischen dem Ausdehnungsgefäß und dem eigentlichen Heizkreislauf zwei parallele Leitungszweige aufweist, wobei im einen Leitungszweig eine Pumpe vorgesehen ist, die von einem Druckfühler im Heizkreislauf gesteuert wird, und eine Rückschlagklappe, im anderen Leitungszweig liegt ein Druckregelventil. Für die Entgasung des Heizmediums sind hier keine Maßnahmen vorgesehen. Es ist zwar an der erwähnten Druckausgleichsleitung endseitig noch ein offener Behälter als Vorratsbehälter über ein nicht näher bezeichnetes Leitungsorgan angeschlossen, aber damit kann das Heizmedium nicht entgast werden.From GB-OS 2209 594 a heating circuit is further known with a boiler, a circulation pump and radiators to which a pressure equalization line is connected. The heating medium, in particular the heating water yes changed depending on the temperature of its volume not insignificant. In addition, liquids are incompressible. With the device described and disclosed here, the pressure of the heating medium in the actual heating circuit should always be kept at the same level, regardless of the respective temperature of the heating medium. This is an expansion vessel with a gas cushion connected to the pressure equalization line, which has two parallel line branches between the expansion tank and the actual heating circuit, wherein in a line branch, a pump is provided, which is controlled by a pressure sensor in the heating circuit, and a non-return valve in the other line branch is a pressure control valve. For the degassing of the heating medium no measures are provided here. Although it is connected to the aforementioned pressure equalization line end still an open container as a reservoir via a non-descript conduit member, but so that the heating medium can not be degassed.

Die Einrichtung nach der US-PS 5 007 583 dient demselben Zweck wie die vorstehend erörterte Einrichtung nach der genannten GB-OS 2 209 594, wenngleich in einer anderen Schaltungsanordnung. Das Ausdehnungsgefäß ist hier über einen siphonartigen Verschluß mit der Atmosphäre verbunden. Erfahrungsgemäß verdunstet das in diesen siphonartigen Verschlüssen befindliche Wasser sehr rasch, so daß das Ausdehnungsgefäß mit der Atmosphäre direkt in Verbindung steht. Das aus dem eigentlichen Heizkreislauf in das Ausdehnungsgefäß gelangende Wasser wird zwar im ersten Augenblick entspannt, da es hier ja einem erheblich geringeren Druck ausgesetzt ist als im geschlossenen Kreislauf, in Folge der direkten Verbindung mit der Atmosphäre nimmt das hier befindliche Heizmedium aber sehr rasch wieder Sauerstoff aus der Luft auf. Aus diesem Grund rostet auch sehr rasch die Wandung des Ausgleichsbehälters in jenem Bereich, in dem der Wasserspiegel schwankt, so daß solche Ausdehnungsgefäße mit einem rostsicheren Innenmantel versehen werden müssen, beispielsweise aus Email. Diese vorbekannte Einrichtung eignet sich ohne Zweifel zur Konstanthaltung des Druckes im eigentlichen Heizkreislauf, als Entgasungseinrichtung für das Heizmedium ist sie allerdings aus den erwähnten Gründen unzureichend.The device according to US-PS 5 007 583 serves the same purpose as the above-discussed device according to said GB-OS 2 209 594, although in another circuit arrangement. The expansion vessel is connected here via a siphon-like closure with the atmosphere. Experience has shown that the water contained in these siphon-like closures evaporates very quickly, so that the expansion vessel is directly in communication with the atmosphere. Although reaching from the actual heating circuit in the expansion vessel water is relaxed at first, since it is here exposed to a much lower pressure than in a closed circuit, due to the direct connection with the atmosphere takes the heating medium but very quickly back to oxygen out of the air. For this reason, very quickly rusts the wall of the surge tank in that area in which the water level fluctuates, so that such expansion tanks must be provided with a rust-proof inner sheath, such as enamel. This prior art device is undoubtedly to keep the pressure constant in the actual heating circuit, as a degassing device for the heating medium, however, it is insufficient for the reasons mentioned.

Aufgabe der Erfindung ist es, demgegenüber einen Heizwasserkreislauf mit einer mit diesem verbundenen Entgasungseinrichtung der eingangs genannten Art bereitzustellen, durch welche ein größerer Teil des in der Flüssigkeit gelösten Gases aus dieser entfernt werden kann und erfindungsgemäß gelingt dies dadurch, daß im Strömungsweg des Heizwassers zwischen dem Heizwasserkreislauf und dem Behälter eine Pralleinrichtung vorgesehen ist, die eine Kammer umfaßt, in welche eine Einspritzdüse reicht, die vor einer Prallfläche mündet, auf welche der aus der Einspritzdüse tretende Wasserstrahl des Heizwasserkreislauf zum Behälter strömenden Heizwassers aufprallt, wobei die Mündungsöffnung der Einspritzdüse kleiner ist als die Abflußöffnung aus der Kammer.The object of the invention is in contrast to provide a Heizwasserkreislauf with a connected thereto degassing of the type mentioned, through which a greater part of the dissolved gas in the liquid can be removed from this and according to the invention succeeds in that in the flow path of the heating water between the Heizwasserkreislauf and the container, a baffle device is provided, which comprises a chamber into which an injection nozzle extends, which opens in front of a baffle surface on which the passing of the injector water jet of the Heizwasserkreislauf bouncing to the container flowing heating water, the mouth of the injection nozzle is smaller than the discharge opening from the chamber.

Bei einer erfindungsgemäßen Entgasungseinrichtung erfolgt in der Pralleinrichtung eine starke Verwirbelung des Heizwassers unter gleichzeitiger schlagartiger Entspannung. Durch die Kombination dieser Einflüsse auf das Wasser können sich die gelösten Gase zu einem wesentlich größeren Teil aus der Flüssigkeit herauslösen und Gasbläschen bilden. Diese können sich anschließend sammeln und in den Behälter, in dem das Heizwasser unter einem wesentlich geringeren Druck steht als im Heizkreis, aus dem Heizwasser austreten.In a degassing device according to the invention is carried out in the baffle a strong turbulence of the heating water with simultaneous sudden relaxation. By combining these influences on the water, the dissolved gases can dissolve to a much greater extent from the liquid and form gas bubbles. These can then collect and emerge from the heating water in the container in which the heating water is under a much lower pressure than in the heating circuit.

Eine Entgasungseinrichtung mit einer Pralleinrichtung, die direkt im Heizkreislauf eingebaut ist, ist weiters aus der DE 2624 336 A1 bereits bekannt. In dieser Pralleinrichtung liegt der Systemdruck vor, so daß zwar eine Verwirbelung des Wassers, nicht aber eine gleichzeitige Entspannung erfolgt. Die Effektivität der Entgasung ist bei dieser Vorrichtung wesentlich geringer als bei der erfindungsgemä-βen Vorrichtung.A degassing device with a baffle device, which is installed directly in the heating circuit, is further known from DE 2624 336 A1. In this baffle system pressure is present, so that although a turbulence of the water, but not a simultaneous relaxation occurs. The effectiveness of degassing is much lower in this device than in the device according to the invention.

Vorzugsweise ist die Prallfläche der erfindungsgemäßen Entgasungseinrichtung, in Richtung des Strömungsweges gesehen, konkav ausgebildet. Dadurch wird die Verwirbelung und Oberflächenvergrößerung des Wassers noch verstärkt.Preferably, the baffle of the degassing device according to the invention, seen in the direction of the flow path, is concave. As a result, the turbulence and surface enlargement of the water is enhanced.

In einem bevorzugten Ausführungsbeispiel ist weiters vorgesehen, daß sich im Strömungsweg des Heizwassers zwischen dem Heizkreis und dem Behälter eine Abkühleinrichtung befindet. Diese ist günstigerweise unmittelbar nach der Pralleinrichtung angeordnet. Dadurch wird die Möglichkeit, daß die entgaste Luft wieder in Lösung geht, wesentlich verringert.In a preferred embodiment, it is further provided that a cooling device is located in the flow path of the heating water between the heating circuit and the container. This is conveniently located immediately after the baffle device. As a result, the possibility that the degassed air goes into solution again, substantially reduced.

Weitere Vorteile und Einzelheiten der Erfindung werden im folgenden anhand der beiliegenden Zeichnung erläutert. In dieser zeigen:

Fig. 1
eine schematische Darstellung des Heizkreises und der an diesen angeschlossenen erfindungsgemäßen Entgasungseinrichtung und
Fig. 2
eine schematische vergrößerte Darstellung der Pralleinrichtung.
Further advantages and details of the invention are explained below with reference to the accompanying drawings. In this show:
Fig. 1
a schematic representation of the heating circuit and connected to this invention degassing and
Fig. 2
a schematic enlarged view of the baffle.

Ein in Fig. 1 schematisch dargestellter Heizwasserkreislauf weist in bekannter Weise eine Vorlaufleitung 31, in der eine Pumpe 35 angeordnet ist, ein oder mehrere Verbraucher 33, eine Rücklaufleitung 32 und einen Heizkessel bzw. Wärmeerzeuger 34 auf. Die erfindungsgemäße Entgasungseinrichtung ist über zwei Leitungen 11, 36 mit dem Heizwassserkreislauf 30 verbunden. Die beiden Leitungen 11, 36 sind über Absperrventile 1 absperrbar. Die Zuführungsleitung 11 führt zu einer Baueinheit 37, welche weiters mit einer Frischwasserzufuhr 10 verbunden ist und die als Ausgang eine Leitung 12 aufweist. Die Baueinheit 37 ist über Absperrventile 1 von den Eingangs- und Ausgangsleitungen 11, 36, 12 absperrbar.An illustrated schematically in Fig. 1 Heizwasserkreislauf has in a known manner a flow line 31, in which a pump 35 is arranged, one or more consumers 33, a return line 32 and a boiler or heat generator 34. The degassing device according to the invention is connected to the Heizwassserkreislauf 30 via two lines 11, 36. The two lines 11, 36 can be shut off via shut-off valves 1. The supply line 11 leads to a structural unit 37, which is further connected to a fresh water supply 10 and which has a line 12 as the output. The assembly 37 is shut off via shut-off valves 1 from the input and output lines 11, 36, 12.

Das in die Baueinheit 37 über die Zuführungsleitung 11 einströmende Heizwasser strömt weiters durch ein elektrisch ansteuerbares, vorzugsweise als Magnetventil ausgebildetes Ventil 5, durch einen Mengendurchflußregler 6, durch einen Strömungswächter 7, durch eine Pralleinrichtung 8 und eine Abkühleinrichtung 9. Das von einer Mikroprozessor-Steuerungseinrichtung 13 ansteuerbare Ventil 5 dient zum Starten und Beenden eines Entgasungsvorganges für Heizwasser aus dem Heizwasserkreislauf 30. Über den Mengendurchflußregler 6 wird ein Flüssigkeitsstrom eingestellt, der unabhängig vom Systemdruck im Heizwasserkreislauf 30 ist. Unabfhängig von diesem Systemdruck, der je nach Heizkreis 30 unterschiedlich hoch ist und üblicherweise über 1,5 bar liegt, werden dadurch gleichmäßige Verhältnisse für die Entgasung geschaffen. Der Strömungswächter 7, dessen Zustand von der Steuerungseinrichtung 13 abfragbar ist, dient zur Kontrolle des Betriebszustandes. Bei geöffnetem Ventil 5 muß vom Strömungswächter 7 ein Durchfluß gemeldet werden, andernfalls liegt eine Betriebsstörung vor, die von der Steuerungseinrichtung 13 als Alarm ausgegeben wird. Umgekehrt darf bei geschlossenem Ventil 5 (bzw. 4) vom Strömungswächter 7 kein Durchfluß gemeldet werden.The inflowing into the assembly 37 via the supply line 11 heating water flows further by an electrically controllable, preferably designed as a solenoid valve valve 5, by a mass flow controller 6, by a flow switch 7, by a baffle device 8 and a cooling device 9. The by a microprocessor controller 13 controllable valve 5 is used to start and stop a degassing process for heating water from Heizwasserkreislauf 30. About the mass flow controller 6, a liquid flow is adjusted, which is independent of the system pressure in Heizwasserkreislauf 30. Regardless of this system pressure, which is different depending on the heating circuit 30 and is usually above 1.5 bar, thereby uniform conditions for degassing are created. The flow monitor 7, the state of which can be interrogated by the control device 13, serves to control the operating state. When the valve 5 is open, a flow must be reported by the flow monitor 7, otherwise there is a malfunction, which is output by the controller 13 as an alarm. Conversely, when the valve is closed 5 (or 4) from the flow switch 7 no flow may be reported.

Wie in Fig. 2 genauer dargestellt, umfaßt die Pralleinrichtung 8 eine Kammer 40, in die eine Einspritzdüse 41 reicht. Die Einspritzdüse 41 mündet vor einer Prallfläche 42, auf welche der aus der Einspritzdüse 41 tretende Wasserstrahl trifft. Grundsätzlich wäre es möglich, als Prallfläche eine ebene Prallplatte vorzusehen. Bevorzugt ist aber eine, in Richtung des Strömungsweges gesehen, konkave bzw. topfförmige Ausbildung der Prallfläche, wodurch deren Effizienz noch erhöht wird. Das aus der Einspritzdüse austretende, auf die Prallfläche 42 treffende Heizwasser wird bei diesem Vorgang schlagartig entspannt und stark verwirbelt und fließt anschließend seitlich um die Prallfläche 42 zur Abflußleitung 43, deren Querschnitt wesentlich größer ist als die Mündungsöffnung der Einspritzdüse 41. Es haben sich dabei Gasbläschen 44 aus dem Heizwasser gelöst, welche vom Flüssigkeitsstrom mitgenommen werden. Diese Bildung der Gasbläschen wird einerseits dadurch bewirkt, daß die Löslichkeit eines Gases in einer Flüssigkeit mit sinkendem Druck abnimmt, andererseits durch die Wirkung der Prallfläche wesentlich verstärkt.As shown in more detail in Fig. 2, the baffle 8 comprises a chamber 40 into which an injection nozzle 41 extends. The injection nozzle 41 opens in front of a baffle 42 on which the water jet passing from the injection nozzle 41 strikes. In principle, it would be possible to provide a flat baffle plate as impact surface. However, a concave or cup-shaped design of the baffle surface, viewed in the direction of the flow path, is preferred, thereby further increasing its efficiency. The emerging from the injector, striking the baffle 42 heating water is suddenly relaxed in this process and strongly swirled and then flows laterally around the baffle 42 to the discharge line 43, the Cross-section is substantially larger than the mouth opening of the injection nozzle 41. There have thereby gas bubbles 44 dissolved from the heating water, which are taken along by the liquid flow. This formation of the gas bubbles is on the one hand effected by the fact that the solubility of a gas in a liquid decreases with decreasing pressure, on the other hand significantly enhanced by the action of the baffle.

Um möglichst auszuschließen, daß Gasbläschen 44 anschließend wiederum zu einem größeren Teil in Lösung gehen, ist die Abkühleinrichtung 9 vorgesehen, die hier von einer schraubenförmigen Leitung aus einem wärmeleitenden Material gebildet wird.In order to exclude as possible that gas bubbles 44 then go in turn to a greater extent in solution, the cooling device 9 is provided, which is formed here by a helical conduit made of a thermally conductive material.

Das Heizwasser, welches die Gasbläschen 44 mit sich führt, gelangt weiter über die Leitungen 12 und 24 in den Behälter 29, und zwar in eine in diesem Behälter angeordnete Butyl-Kautschuk-Blase 28. Die Kautschuk-Blase 28 ist über ein Überdruckventil 26 mit Atmosphärendruck verbunden, wobei das Überdruckventil 26 bei einem geringen Überdruck öffnet, der unter 1 bar liegt, vorzugsweise 0,5 bar oder kleiner ist. Dieser geringfügige Überdruck ist notwendig, damit vom einströmenden Heizwasser die Grundspannung der Kautschuk-Blase 28 überwunden wird.The heating water, which carries the gas bubbles 44, passes on via the lines 12 and 24 in the container 29, in a container disposed in this butyl rubber bladder 28. The rubber bladder 28 is connected via a pressure relief valve 26 with Atmospheric pressure connected, wherein the pressure relief valve 26 opens at a low pressure, which is less than 1 bar, preferably 0.5 bar or less. This slight overpressure is necessary so that the basic tension of the rubber bubble 28 is overcome by the inflowing heating water.

Das Heizwasser ist im Behälter 29 bzw. in der darin angeordneten Kautschuk-Blase 28 somit praktisch drucklos und die vom einströmenden Heizwasser mitgeführten Gasbläschen können in der Kautschuk-Blase 28 aufsteigen und durch das Überdruckventil 26 entweichen. Die Rückführung des Heizwassers in den Heizkreislauf 30 erfolgt über eine Pumpe 19, die von der Steuerungseinrichtung 13 angesteuert wird. Das von der Pumpe 19 aus dem Behälter 29 angesaugte Heizwasser strömt über die Leitung 25 und ein darin angeordnetes Rückschlagventil 21 und Absperrventil 20 in die Pumpe 19 und gelangt durch ein Drosselventil 18 und einen Schmutzfänger 15 über die Leitung 36 zurück in den Heizkreislauf 30. Die Ansteuerung der Pumpe 19 durch die Steuerungseinrichtung 13 erfolgt in Abhängigkeit von dem vom Drucksensor 16 aus-gegebenen Wert, durch welchen der Anlagendruck festgelegt ist.The heating water is thus practically unpressurized in the container 29 or in the rubber bladder 28 arranged therein, and the gas bubbles entrained by the incoming heating water can rise in the rubber bladder 28 and escape through the overpressure valve 26. The return of the heating water in the heating circuit 30 via a pump 19 which is controlled by the control device 13. The sucked by the pump 19 from the container 29 heating water flows through line 25 and disposed therein check valve 21 and check valve 20 in the pump 19 and passes through a throttle valve 18 and a strainer 15 via the line 36 back into the heating circuit 30. Die Control of the pump 19 by the control device 13 takes place as a function of the value given by the pressure sensor 16, by which the system pressure is fixed.

Der Behälter 29 dient weiters als ein sogenannter Expansionsbehälter. Bei einer Aufheizung des Heizwassers im Heizkreislauf 30 dehnt sich dieses aus, wobei sich der Druck im Heizkreislauf über einen Maximalwert erhöht. Dadurch öffnet ein Überströmregler 17 (proportional zum Überdruck), über den der Behälter 29 bzw. die darin angeordnete Kautschuk-Blase 28 mit dem Heizwasserkreislauf 30 verbunden ist. Der Überströmregler 17 liegt im gezeigten Ausführungsbeispiel parallel zur Pumpe 19. Grundsätzlich denkbar und möglich wäre es auch, daß dieser Überströmregler 17 parallel zum Entgasungsventil 5 liegt oder bei entsprechender Ansteuerung des Entgasungsventils 5 durch die Steuerungseinrichtung 13 ganz entfällt, wobei ein Überdruck von der Steuerungseinrichtung jeweils über das Entgasungsventil 5 abgelassen wird.The container 29 further serves as a so-called expansion tank. When heating the heating water in the heating circuit 30, this expands, wherein the pressure in the heating circuit increases above a maximum value. This opens an overflow regulator 17 (proportional to the overpressure), via which the container 29 or the rubber bubble 28 arranged therein is connected to the heating water circuit 30. In principle, conceivable and possible, it would also be possible for this overflow regulator 17 to lie parallel to the degassing valve 5 or to be completely omitted by the control device 13 if the degassing valve 5 is controlled accordingly, with an overpressure from the control device in each case is discharged via the degassing valve 5.

Bei der Abkühlung des Heizwassers im Heizwasserkreislauf 30 vermindert sich dessen Volumen wieder. Diese Volumensverminderung äußert sich durch einen vom Drucksensor 16 angezeigten Druckabfall. Von der Steuerungseinrichtung 13 wird daraufhin die Pumpe 19 zur Anhebung des Anlagendruckes in Betrieb genommen. Üblicherweise ist das Pumpvolumen der Pumpe 19 wesentlich größer, als dies zum Ausgleich des Volumsverlustes aufgrund der Abkühlung des Heizwassers im Heizkreislauf 30 notwendig wäre. Bei herkömmlichen Expansions-einrichtungen öffnet daher bei einer Inbetriebnahme der Pumpe 19 der Überströmregler 17, und ein Großteil des von der Pumpe geförderten Heizwassers gelangt über den Überströmregler 17 zurück in den Behälter 29. Bei der erfindungsgemäßen Entgasungseinrichtung wird bevorzugterweise ein Entgasungsprozeß gleichzeitig mit einem Anlaufen der Pumpe 19 (aufgrund eines zu niedrigen Anlagendrucks) durchgeführt, zu welchem Zweck das Ventil 5 geöffnet wird und erst einen kurzen Zeitraum vor dem Abschalten der Pumpe 19 wieder geschlossen wird. Durch diese Kombination des Entgasungsprozesses mit der Heizwassernachspeisung ergibt sich eine deutliche Energieeinsparung.When the heating water in the heating water circuit 30 cools down, its volume decreases again. This decrease in volume is manifested by a pressure drop indicated by the pressure sensor 16. From the control device 13, the pump 19 is then taken to increase the system pressure in operation. Usually, the pumping volume of the pump 19 is substantially greater than would be necessary to compensate for the volume loss due to the cooling of the heating water in the heating circuit 30. In conventional expansion devices therefore opens at start-up of the pump 19, the spill 17, and a majority of funded by the pump heating water passes through the spill 17 back into the container 29. In the degassing according to the invention is preferably a degassing process simultaneously with a tarnishing Pump 19 (due to a too low system pressure) carried out, for which purpose the valve 5 is opened and only a short period before switching off the pump 19 is closed again. This combination of the degassing process with the Heizwassernachspeisung results in a significant energy savings.

Die von den strichlierten Linien 38 und 39 umgebenen Teile sind bevorzugterweise als Baueinheiten ausgebildet.The parts surrounded by the dashed lines 38 and 39 are preferably designed as structural units.

Aus der Druckdifferenz an den Drucksensoren 22, 23, welche den Druck an der Behälterunter- und Behälteroberseite messen, berechnet die Mikroprozessor-Steuerungseinrichtung 13 den Heizwasserstand im Behälter 29. Da geringfügige Undichtigkeiten im Heizungssystem immer vorhanden sind, kommt es mit der Zeit zu einer gewissen Abnahme des Flüssigkeitsstandes im Behälter 29. Sobald dieser Flüssigkeitsstand unter einen vorgegebenen Minimalwert abgesunken ist, wird von der Steuerungseinrichtung 13 das Ventil 4 betätigt, um über die Frischwasserzufuhr 10 neues Heizwasser in die Kautschuk-Blase 28 im Behälter 29 nachzufüllen. In der Frischwasserzufuhrleitung ist ein Druckminderer 2 zur Absenkung des Wasserdruckes in den Bereich des Systemdruckes des Heizkreises 30 und ein elektronischer Wasserzähler 3 vorgesehen. Aufgrund der benötigten Nachspeisemengen an Heizwasser kann festgestellt werden, ob es sich um einen Volumsverlust aufgrund normaler Leckagen und aufgrund einer Gasausscheidung durch die Entgasungseinrichtung oder aber um einen außergewöhnlichen Wasserverlust handelt, der beispielsweise wegen eines Rohrbruchs auftritt.From the pressure difference at the pressure sensors 22, 23, which measure the pressure at the container bottom and container top, the microprocessor controller 13 calculates the Heizwasserstand in the container 29. Since minor leaks in the heating system are always present, it comes to a certain time over time As soon as this liquid level has fallen below a predetermined minimum value, the valve 4 is actuated by the control device 13 in order to supply new heating water into the rubber bubble 28 in the container 29 via the fresh water supply 10 refill. In the fresh water supply line, a pressure reducer 2 for lowering the water pressure in the range of the system pressure of the heating circuit 30 and an electronic water meter 3 is provided. Due to the required make-up quantities of heating water can be determined whether it is a loss of volume due to normal leaks and due to gas excretion through the degassing or an extraordinary loss of water, which occurs for example due to a pipe break.

Das nachgespeiste Frischwasser wird weiters über den Strömungswächter 7 der Pralleinrichtung 8 zugeführt, bevor es in den Behälter 29 gelangt. Auf diese Weise wird bereits bei der Nachspeisung von Frischwasser eine effektive Entgasung des nachgespeisten Heizwassers erreicht.The refilled fresh water is further supplied via the flow monitor 7 of the baffle device 8, before it enters the container 29. In this way, an effective degassing of the nachgespeisten heating water is already achieved during the refilling of fresh water.

Die Zuführungsleitung 11 zur Entgasungseinrichtung, über die Heizwasser zur Entgasung entnommen wird, zweigt im gezeigten Ausführungsbeispiel von der Rücklaufleitung 32 des Heizwasserkreislaufes 30 ab. Möglich wäre es auch, diese Ableitung an der Vorlaufleitung 31 vor-zusehen, wobei das der Entgasungseinrichtung zugeführte Heizwasser aber keine höheren Temperaturen als 90° Celsius aufweisen darf. Dies könnte durch entsprechende Sensoren überwacht werden, auch könnten geeignete Abkühlgefäße vorgeschaltet werden.The supply line 11 to the degassing, is removed via the heating water for degassing, branches in the illustrated embodiment of the return line 32 of Heizwasserkreislaufes 30 from. It would also be possible to pre-view this discharge at the feed line 31, wherein the heating water supplied to the degassing device may however not have higher temperatures than 90 ° Celsius. This could be monitored by appropriate sensors, also suitable Abkühlgefäße could be connected upstream.

Im gezeigten Ausführungsbeispiel ist somit eine Entgasungseinrichtung (welche insbesondere die Pralleinrichtung 8, die Abkühleinrichtung 9, den Behälter 29 mit der Kautschuk-Blase 28 und die Pumpe 19 umfaßt) mit einer Druckkonstanthalteeinrichtung (Überströmregler 17, Behälter 29 mit Kautschuk-Blase 28 und Pumpe 19) und einer Frischwassernachspeisung (Druckminderer 2, Wasserzähler 3 und Ventil 4) kombiniert.In the embodiment shown thus is a degassing (which in particular the baffle device 8, the cooling device 9, the container 29 with the rubber bladder 28 and the pump 19 includes) with a pressure maintaining device (spill 17, container 29 with rubber bladder 28 and pump 19 ) and a Frischwassernachspeisung (pressure reducer 2, water meter 3 and valve 4) combined.

Grundsätzlich denkbar und möglich wäre es auch, die Entgasungseinrichtung unabhängig von einer Druckkonstanthalteeinrichtung und/oder einer Nachspeiseeinrichtung für Frischwasser auszubilden. Anstelle der Abkühleinrichtung 9 in Form einer schraubenförmigen Leitung könnte beispielsweise auch ein Wärmetauscher vorgesehen sein, durch den die Wärme des zu entgasenden Heizwassers an das aus dem Behälter in den Heizkreislauf zurückströmende entgaste Heizwasser abgegeben wird.In principle, it would also be conceivable and possible to design the degassing device independently of a pressure stabilizer and / or a make-up device for fresh water. Instead of the cooling device 9 in the form of a helical line, for example, a heat exchanger could be provided, through which the heat of the heating water to be degassed is discharged to the flowing back from the container into the heating circuit degassed heating water.

LegendeLegend zu den Hinweisziffern:to the reference numbers:

11
Absperrventilshut-off valve
22
Druckmindererpressure reducer
33
Wasserzählerwater meter
44
VentilValve
55
VentilValve
66
Mengendurchflußreglermass flow controller
77
Strömungswächterflow Switch
88th
Pralleinrichtungbaffle
99
Abkühleinrichtungcooling device
1010
FrischwasserzufuhrFresh water supply
1111
Zuführungsleitungfeed pipe
1212
Leitungmanagement
1313
Mikroprozessor-SteuerungseinrichtungMicroprocessor control device
1515
Schmutzfängerstrainer
1616
Drucksensorpressure sensor
1717
ÜberströmreglerOverflow
1818
Drosselventilthrottle valve
1919
Pumpepump
2020
Absperrventilshut-off valve
2121
Rückschlagventilcheck valve
2222
Drucksensorpressure sensor
2323
Drucksensorpressure sensor
2424
Leitungmanagement
2525
Leitungmanagement
2626
ÜberdruckventilPressure relief valve
2828
Butyl-Kautschuk-BlaseButyl rubber bladder
2929
Behältercontainer
3030
Heizwasserkreislaufheating water
3131
Vorlaufleitungsupply line
3232
RücklaufleitungReturn line
3333
Verbraucherconsumer
3434
Wärmeerzeugerheat generator
3535
Pumpepump
3636
Leitungmanagement
3737
Baueinheitunit
3838
Baueinheitunit
3939
Baueinheitunit
4040
Kammerchamber
4141
Einspritzdüseinjection
4242
Prallflächebaffle
4343
Abflußleitungdrain line
4444
Gasbläschengas bubbles

Claims (10)

  1. Heating water circulation comprising a degasing installation for the heating water which is connected thereto and which has a container (29) which is connected to the heating water circulation via a feed pipe (11) and at least one valve (1) and in which the heating water is under a substantially lower pressure than in the heating water circulation, and a recycle pump (19) for recycling the heating water from the container into the heating water circulation, characterized in that a baffle installation (8) is provided in the flow path of the heating water between the heating water circulation (30) and the container (29), which baffle installation (8) comprises a chamber (40) into which extends an injection nozzle (41) which opens in front of a baffle surface (42) against which the water jet of the heating water flowing from the heating water circulation (30) to the container (29) impacts, which water jet emerges from the injection nozzle (41), the opening of the injection nozzle (41) being smaller than the outflow opening from the chamber (40).
  2. Heating water circulation comprising a degasing installation connected thereto, according to Claim 1, characterized in that the baffle surface (42), viewed in the direction of the flow path, is concave.
  3. Heating water circulation comprising a degasing installation connected thereto, according to either of Claim 1 and Claim 2, characterized in that a bladder (28) of an elastic material in which the heating water is present is arranged in the interior of the container (29), as known per se.
  4. Heating water circulation comprising a degasing installation connected thereto, according to Claim 3, characterized in that the bladder (28) is connected to the atmosphere in a manner known per se via a pressure-relief valve (26) which opens at a low excess pressure of less than 1 bar, preferably of 0.5 bar or less.
  5. Heating water circulation comprising a degasing installation connected thereto, according to any of Claims 1 to 4, characterized in that a cooling installation (9), preferably in the form of a coiled pipe of heat-conducting material, is provided in the flow path of the heating water between the heating water circulation (30) and the container (29).
  6. Heating water circulation comprising a degasing installation connected thereto, according to Claim 5, characterized in that the cooling installation (9) is arranged between the baffle installation (8) and the container (29), preferably directly after the baffle installation (8).
  7. Heating water circulation comprising a degasing installation connected thereto, according to any of Claims 1 to 6, characterized in that the container (29) is connected to the heating water circulation (30) via an overflow controller (17) which opens when a set maximum pressure is exceeded, the overflow controller (17) preferably being present in a pipe branch parallel to the pump (19).
  8. Heating water circulation comprising a degasing installation connected thereto, according to any of Claims 1 to 7, characterized in that a flow rate controller (6) is arranged in the feed pipe (11) .
  9. Heating water circulation comprising a degasing installation connected thereto, according to any of Claims 1 to 8, characterized in that a flow monitor (7) is arranged in the feed pipe (11).
  10. Heating water circulation comprising a degasing installation connected thereto, according to any of Claims 1 to 9, characterized in that a fresh water feed pipe opens into the pipe to which the baffle installation (8) is connected, before the baffle installation (8), viewed in the direction of flow.
EP20000124818 1999-11-17 2000-11-14 De-gasing installation Expired - Lifetime EP1102012B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200030907T SI1102012T1 (en) 1999-11-17 2000-11-14 De-gasing installation
AT00124818T ATE338251T1 (en) 1999-11-17 2000-11-14 DEGASSING DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT193899 1999-11-17
AT193899 1999-11-17

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EP1102012A2 EP1102012A2 (en) 2001-05-23
EP1102012A3 EP1102012A3 (en) 2003-04-02
EP1102012B1 true EP1102012B1 (en) 2006-08-30

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EP (1) EP1102012B1 (en)
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DK (1) DK1102012T3 (en)
ES (1) ES2270774T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE288054T1 (en) * 2001-06-01 2005-02-15 Helmut Friedrich DEVICE FOR DEGASING LIQUIDS IN A CLOSED OR OPEN CIRCUIT
NL1036252C2 (en) * 2008-04-24 2010-05-31 Flamco Stag Gmbh HEATING SYSTEM WITH EXPANSION DEVICE.
CH710814A2 (en) * 2015-03-03 2016-09-15 Imi Hydronic Eng Switzerland Ag Device for degassing a liquid.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2346286C3 (en) * 1973-09-14 1978-11-23 Joh. Vaillant Kg, 5630 Remscheid Device for gas separation
DE2624336A1 (en) * 1976-05-31 1977-12-15 Myson Heat Exchangers METHOD AND DEVICE FOR DEGASSING A GAS-LIQUID MIXTURE
DE3109918C2 (en) * 1981-03-14 1989-03-16 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund Liquid pump with gas separation chamber
US5007583A (en) * 1987-05-05 1991-04-16 A. Schwarz & Co. Device for accomodating expansion in fluid circulation systems
GB8721090D0 (en) 1987-09-08 1987-10-14 Pressure Units Ltd Central heating system
AT400191B (en) 1992-03-25 1995-10-25 Eder Anton DEGASSING DEVICE
DE29905671U1 (en) * 1999-03-18 1999-06-10 Polynorm GmbH, 42555 Velbert Device for increasing the degassing performance in hydraulic systems

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DE50013385D1 (en) 2006-10-12
EP1102012A2 (en) 2001-05-23
DK1102012T3 (en) 2007-01-02
EP1102012A3 (en) 2003-04-02

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