DE482635C - In bypass lines built-in shut-off valve for facilities arranged in feed water systems of a steam power plant, such as feed water preheaters and the like. like - Google Patents

In bypass lines built-in shut-off valve for facilities arranged in feed water systems of a steam power plant, such as feed water preheaters and the like. like

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Publication number
DE482635C
DE482635C DEA54282D DEA0054282D DE482635C DE 482635 C DE482635 C DE 482635C DE A54282 D DEA54282 D DE A54282D DE A0054282 D DEA0054282 D DE A0054282D DE 482635 C DE482635 C DE 482635C
Authority
DE
Germany
Prior art keywords
feed water
preheaters
valve
shut
power plant
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.)
Expired
Application number
DEA54282D
Other languages
German (de)
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.)
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Priority to DEA54282D priority Critical patent/DE482635C/en
Application granted granted Critical
Publication of DE482635C publication Critical patent/DE482635C/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/003Feed-water heater systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F22D1/325Schematic arrangements or control devices therefor

Description

In Umgehungsleitungen eingebautes Absperrventil für in Speisewassersystemen einer Dampfkraftanlage angeordnete Einrichtungen, wie Speisewasservorwärmer u. dgl. In die Speiseleitung von Speisewasseranlagen, insbesondere für Dampfkessel, eingebaute Einrichtungen, wie Oberflächenvorwärmer, müssen, wie die Leitung selbst, für eine bedeutend größere Durchflüßmenge, als die normale gebaut sein. Die Kesselvorschriften verlangen von den Speisepumpen meistens die doppelte normale Fördermenge. Die Oberflächenvorwärmer leiden unter dieser Bedingung, weil die Forderung des doppelten normalen Durchflusses wegen des Durchflußwiderstandes für den normalen Betrieb sehr geringe Wassergeschwindigkeiten verlangt. Die Vorwärmer fallen deshalb bedeutend teurer und platzraubender aus. Gemäß der Erfindung wird dieser Nachteil dadurch behoben, daß bei vorübergehend abnormal großen Speisemengen die vergrößerte Wassermenge durch eine Umgehungsleitung (Bvpaß) geführt und so der Vorwärmer entlastet wird. Dadurch kann die Wassergeschwindigkeit in den Vorwärmern bei 2,,ormallast der Kraftmaschine schon so hoch gehalten werden, als die volle Förderfähigkeit der Pumpen überhaupt erlaubt, wodurch der mittlere Betriebswirkungsgrad dieser Einrichtungen wesentlich gehoben wird. , Umgehungsleitungen, um bei Betriebsstörungen den Vor--wärmer ausschalten zu können, sind an sich bekannt.Shut-off valve built into bypass lines for feed water systems Devices arranged in a steam power plant, such as feed water preheaters and the like. Built into the feed line of feed water systems, especially for steam boilers Devices such as surface preheaters must, like the pipe itself, be used for a significantly larger flow rate than the normal one. The boiler regulations usually require twice the normal delivery rate from the feed pumps. The surface preheater suffer from this condition because of the requirement of double normal flow very low water velocities for normal operation because of the flow resistance demands. The preheaters are therefore significantly more expensive and space-consuming. According to the invention, this disadvantage is eliminated in that at temporarily abnormally large amounts of food the increased amount of water through a bypass (Bvpaß) and so the preheater is relieved. This allows the water speed in the preheaters at 2,, ormal load of the engine are already kept so high that than the full pumping capacity of the pumps is allowed at all, creating the mean The operating efficiency of these facilities is increased significantly. , Bypass lines, to be able to switch off the preheater in the event of malfunctions are known per se.

Hier handelt es sich jedoch darum, die Umgehungsleitung selbsttätig zu öffnen, sobald der Druckverlust in den Vorwärmern bei Spitzenleistungen einem bestimmten Wert überschreitet. Die Erfindung ist in der Zeichnung von zwei Beispielen näher erläutert. Abb. i zeigt das Speisesystem einer Dampf- kraftanlage. Der Abdampf der Dampf- turbine i wird im Kondensator -z niederge- schlagen und durch die Kondensatpumpe 3 durch einen mit Dampf, eventuell Anzapf- dampf, geheizten Vorwärmer d. hindurch in den Behälter 5 gefördert, der zwecks Ver- hinderung von Luftaufnahme unter Luftleere stehen kann. Von hier wird das Wasser nach Maßgabe des Kesselbedarfes mittels der Speisepumpe 6 durch die Vorwärmer 7 und 8 hindurch zum Kessel i7 geführt. Die Vor- wärmer sind irn Wasserteil so bemessen, daß bei einer mittleren, der \ ormallast der Tur- bine angepaßten Speisemenge der Dur chfluß- v erlust so hoch ist, als man aus wirtschaft- lichen Gründen gerade noch zulassen kann, zum Zwecke, einen möglichst hohen Wärme- übergang zu erzielen. Damit aber bei den höchstvorkommenden Speisespitzen die Widerstände nicht für die Pumpe unüber- windliche Werte annehmen, sind die Vor- wärmer 7 und 8 erfindungsgemäß durch ein feiler- oder gewichtsbelastetes Umwegventil 9 umgehbar, welch letzteres sich bei Überschrei- tung des zulässigen Druckverlustes in den Vorwärmern in dem Maße öffnet, daß der Druckunterschied vor und hinter dem Ventil (bzw. vor und hinter dem Vorwärrner) gleich bleibt. Dieses selbsttätige Umwegventil (Bypaßventil) ersetzt die bekannten von Hand gesteuerten Ventile aber vollkommen für den Fall, daß die Vorwärmnear bei eventuellen Beschädigungen: durch die Ventile i o und i i abge. schleußt werden müssen. An Stelle des Schleußventils i i kann auch ein Rückschlagorgan verwendet werden.Here, however, it is a matter of automatically opening the bypass line as soon as the pressure loss in the preheaters occurs Excellence of a certain value exceeds. The invention is shown in the drawing of two examples explained in more detail. Fig. I shows the feed system of a steam power plant. The exhaust steam of the steam turbine i is lowered in the condenser -z beat and through the condensate pump 3 by a steam, possibly tap steam, heated preheater d. through in conveyed the container 5, which for the purpose of hindrance of air intake under vacuum can stand. From here the water will follow Determination of the boiler requirement by means of the Feed pump 6 through preheaters 7 and 8 passed through to boiler i7. The pre warmer are dimensioned in the water part so that at an average, the \ ormal load of the tur- bine adapted feed quantity of the flow loss is as high as can be expected from economic can just allow for certain reasons, for the purpose of achieving the highest possible heat to achieve transition. But with the the most popular dining tips Resistances are not insurmountable for the pump assuming windy values, the advantages warmer 7 and 8 according to the invention by a Feiler or weight loaded bypass valve 9 can be bypassed, which latter is the permissible pressure loss in the Preheating opens to the extent that the Pressure difference upstream and downstream of the valve (or in front of and behind the preheater) the same remain. This automatic bypass valve (bypass valve) replaces the well-known manually controlled valves, but completely in the event that the preheating is removed in the event of any damage: by the valves io and ii. must be closed. Instead of the lock valve ii, a non-return device can also be used.

Die Umwegwassermenge entzieht sich allerdings dabei der Vorwärmung, weshalb es zweckmäßig ist, jede -einzelne Vorwärmstufe mit einem eigenen Umweg zu versehen (Abb.2), wobei sich das nicht vorgewärmte Umwegwasser des Vorwärmers 7 mit dem vorgewärmten Wasser aus dem Vorwärmer 7 wieder vermischt und so der Umweg (Bypaß) =d. des folgenden Vorwärmers 8 wärmeres Wassererhält, als dies bei der Anordnung nach Abb. i der Fall ist. Bei eventuellen Beschädigungen können die einzelnen Vorwärmer durch die Ventile i o, i i, 12, 13 für sich außer Betrieb genommen werden.However, the amount of detour water eludes the preheating process, which is why it is advisable to provide each individual preheating stage with its own detour (Fig so the detour (bypass) = d. of the following preheater 8 receives warmer water than is the case with the arrangement according to Fig. i. In the event of any damage, the individual preheaters can be taken out of service by the valves io, ii, 12, 13 .

Abb. 3 zeigt eine weitere Anwendung der Erfindung, wobei die Umwegorgane 15, 16, die sich bei übermäßiger Speisung öffnen, unmittelbar in die Wasserkammer des Vorwärtners eingebaut sind.Fig. 3 shows a further application of the invention, wherein the detour organs 15, 16, which open in the event of excessive feeding, directly into the water chamber of the forwarder are installed.

Claims (3)

PATRNTAN5PRÜCHR: i. In Umgehungsleitungen eingebautes Absperrventil für in Speisewassersystemen einer Dampfkraftanlage angeordnete Einrichtungen, wie Speisewasservorwärmer u. dgl., dadurch gekennzeichnet, daß diese Absperrventile als feder-oder -gewichtsbelastete Ventile oder ähnlich wirkende Abschließ- oder Drosselvorrichtungen ausgebildet sind, die selbsttätig öffnen, sobald der Druckverlust in den Vorwärmern einen bestimmten Wert überschreitet. PATRNTAN5PRÜCHR: i. Shut-off valve built into bypass lines for devices arranged in the feed water systems of a steam power plant, such as Feed water preheater and the like, characterized in that these shut-off valves as spring-loaded or weight-loaded valves or similarly acting locking or Throttle devices are designed which open automatically as soon as the pressure loss occurs exceeds a certain value in the preheaters. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß mehrere Vorwärmer (7, 8) einen einzigen gemeinsamen Umweg mit gemeinsamem selbsttätigen;Umwegventil (9) besjtzexi (Abb. i). 2. Device according to claim i, characterized in that several preheaters (7, 8) have a single common Detour with common automatic; bypass valve (9) besjtzexi (Fig. I). 3. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß jeder Vorwärmer (7 bzw. 8) für sich einen eigenen Umweg mit selbsttätigem Umwegventil (9 bzw. 1q.) besitzt (Abb. 2). q.. Einrichtung nach Anspruch 2; dadurch gekennzeichnet, daß die Umwegventile (i5, 16) in den Vorwärmern selbst eingebaut sind (Abb. 3).3. Establishment according to claim i, characterized in that each preheater (7 or 8) for itself has its own detour with an automatic detour valve (9 or 1q.) (Fig. 2). q .. device according to claim 2; characterized in that the bypass valves (i5, 16) are built into the preheaters themselves (Fig. 3).
DEA54282D 1928-05-22 1928-05-22 In bypass lines built-in shut-off valve for facilities arranged in feed water systems of a steam power plant, such as feed water preheaters and the like. like Expired DE482635C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA54282D DE482635C (en) 1928-05-22 1928-05-22 In bypass lines built-in shut-off valve for facilities arranged in feed water systems of a steam power plant, such as feed water preheaters and the like. like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA54282D DE482635C (en) 1928-05-22 1928-05-22 In bypass lines built-in shut-off valve for facilities arranged in feed water systems of a steam power plant, such as feed water preheaters and the like. like

Publications (1)

Publication Number Publication Date
DE482635C true DE482635C (en) 1929-09-17

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DEA54282D Expired DE482635C (en) 1928-05-22 1928-05-22 In bypass lines built-in shut-off valve for facilities arranged in feed water systems of a steam power plant, such as feed water preheaters and the like. like

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DE (1) DE482635C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918703C2 (en) * 1979-05-09 1984-10-18 Kraftwerk Union AG, 4330 Mülheim Adjustable heat exchanger
EP1241323A1 (en) * 2001-03-15 2002-09-18 Siemens Aktiengesellschaft Method for operating a steam power plant and steam power plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918703C2 (en) * 1979-05-09 1984-10-18 Kraftwerk Union AG, 4330 Mülheim Adjustable heat exchanger
EP1241323A1 (en) * 2001-03-15 2002-09-18 Siemens Aktiengesellschaft Method for operating a steam power plant and steam power plant
WO2002075119A1 (en) * 2001-03-15 2002-09-26 Siemens Aktiengesellschaft Method for operating a steam power installation and corresponding steam power installation
US6964167B2 (en) 2001-03-15 2005-11-15 Siemens Aktiengesellschaft Method for operating a steam power installation and corresponding steam power installation

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