EP0795729A2 - Condenseur de vapeur - Google Patents

Condenseur de vapeur Download PDF

Info

Publication number
EP0795729A2
EP0795729A2 EP97810090A EP97810090A EP0795729A2 EP 0795729 A2 EP0795729 A2 EP 0795729A2 EP 97810090 A EP97810090 A EP 97810090A EP 97810090 A EP97810090 A EP 97810090A EP 0795729 A2 EP0795729 A2 EP 0795729A2
Authority
EP
European Patent Office
Prior art keywords
air cooler
compartment
steam
condensate
compartments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97810090A
Other languages
German (de)
English (en)
Other versions
EP0795729B1 (fr
EP0795729A3 (fr
Inventor
Peter Dr. Baumann
Christian Stucki
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.)
General Electric Switzerland GmbH
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0795729A2 publication Critical patent/EP0795729A2/fr
Publication of EP0795729A3 publication Critical patent/EP0795729A3/fr
Application granted granted Critical
Publication of EP0795729B1 publication Critical patent/EP0795729B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases

Definitions

  • the invention relates to a steam condenser as described in the preamble of claim 1.
  • Such a steam condenser is known from CH-PS 423 819 and DE-OS 1 948 073.
  • the condenser tubes are arranged in several, so-called sub-bundles in a condenser housing.
  • the steam flows through an exhaust pipe into the condenser housing and is distributed in the room through flow channels (steam entry lanes).
  • the free inflow of steam to the outside tubes of the partial bundles is ensured.
  • the steam then flows through the bundles with little resistance due to the low depth of the tube rows.
  • the partial bundles in the condenser are arranged next to one another in such a way that flow channels arise between them, which in the sectional view appear to be of the same order of magnitude as the partial bundles themselves.
  • the tubes form in the successive rows a permeable enclosure, which preferably represents the same hydraulic resistance throughout.
  • This known condenser has the advantage that due to the loose arrangement of the sub-bundles, all peripheral tubes of a sub-bundle are well supplied with steam without a noticeable loss of pressure.
  • the capacitors working under vacuum require a well-functioning suction system so that incoming, non-condensable gases are always removed from the condensation area. Cooling pipes that are surrounded or flowed around by these gases mixed with steam are almost completely lost as a condensation surface, which reduces the output.
  • the air cooler is geometrically designed in such a way that the deterioration of the heat transfer on the steam side is partially compensated for by an increase in the speed of the gas phase.
  • each support plate has a recess towards the bottom of the air cooler, which serves as a drainage opening for condensate accumulating in the air cooler.
  • its bottom is provided with an incline over the entire longitudinal orientation, according to which condensate flows out of the compartments with the higher air cooler floor to the lowest level.
  • the compartment with the lowest air cooler floor is drained into the condensate collecting vessel of the condenser by means of a line.
  • the condenser line of the air cooler adapts to the approximate temperature curve of the cooling water in the neighboring pipes, it therefore ensures that suitable ventilation of the precooler is guaranteed to be approximately proportional to the non-condensable gases that occur.
  • the invention is based on the object, in the case of a steam condenser of the type mentioned, to specifically align the suction of the inert gases from the air cooler of each individual compartment with the respective compartment and to improve with it. This is aimed at an inexpensive increase in capacitor efficiency.
  • the essence of the invention is to be seen in the fact that the cutouts for the condensate flow between adjacent compartments in the support plates are closed in a gas-tight and vapor-tight manner. An exchange flow of residual vapor / inert gas mixture within the air cooler between neighboring compartments is thus prevented.
  • a preferred embodiment is to be seen in that at least on the air cooler floor of the compartment with the lowest air cooler floor is arranged at least one baffle wall arranged parallel to a support plate, so that the condensate flowing down from a higher compartment is dustable on this baffle wall, and thus through the Gaps formed drainage channel for the condensate from a higher compartment can be closed hydraulically both gas and vapor tight.
  • the embodiment shown enables the air cooler in each compartment to be used more effectively in every operating state of the steam condenser, in that a compensating flow of the residual vapor / inert gas mixture in the air cooler between adjacent compartments is completely prevented.
  • the heat exchanger shown is a surface condenser in a rectangular design, as it is suitable for a so-called underfloor arrangement.
  • Parts which are not essential to the invention, such as the condenser neck, condensation chamber, condenser jacket, water chambers, tube sheets, condensate collection vessel, have been omitted, but are briefly explained below in connection with the invention.
  • the condensation space inside the condenser jacket contains a plurality of bundles 20 arranged side by side.
  • a bundle 20 consists of a number of tubes, of which only one cooling tube designated by 13 is shown in FIG. At both ends, the cooling tubes are fastened in tube sheets. Water chambers are arranged beyond the tube sheets. The condensate flowing out of the bundles 20 is collected in a condensate collection vessel and from there it enters the water / steam cycle.
  • the condensation part of the bundle 20, which is only partially illustrated by the dotted surface, is designated by 1.
  • the continuous support plates 5, which serve to support the cooling tubes 13 the sub-bundles are divided into compartments 10.
  • a cavity 19 is formed inside each bundle 20, in which the vapor enriched with non-condensable gases collects.
  • An air cooler 3 is accommodated in this cavity 19. The residual steam / inert gas mixture flows through this air cooler, with most of the steam condensing. The rest of the mixture is suctioned off.
  • the air cooler 3 located inside the tube bundle has the effect that the residual vapor / inert gas mixture within the condenser bundle 20 is accelerated. This improves the situation in that there are no small flow velocities that could impair the heat transfer.
  • the air cooler 3 has the task of removing the non-condensable gases from the condenser. During this process, the steam losses are to be kept as low as possible. This is achieved in that the residual vapor inert gas mixture is accelerated in the direction of the suction channel 4. The high speed results in good heat transfer, which leads to extensive condensation of the residual steam. In order to accelerate the mixture, the cross section in the direction of flow is increasingly smaller.
  • FIG. 2 the air cooler 3 with upstream pre-cooler 2 and the suction channel 4 is shown enlarged.
  • the support plate 5 also divides the air cooler 3 into compartments 10, a recess 18 being provided in the support plate 5 against an air cooler base 21. This recess 18 enables transverse compensation of the condensate accumulating in the air cooler 3.
  • the suction channel 4 is common to all compartments 10; it is not divided by the support plates 5.
  • a pressure drop between the compartment 10 on the cooling water outlet side 25 and the compartment on the cooling water inlet side 24 can be determined.
  • a compensating flow of the residual steam-inert gas mixture is recorded. Residual steam-inert gas mixture then flows from compartments 10 with higher pressure - that is also with a higher cooling water temperature - within the air cooler into the compartment with the lowest pressure and the lowest cooling water temperature.
  • the function of the air cooler 3 in the vicinity of the cooling water inlet side 24 is restricted by the fact that compartments located closer to the cooling water inlet have to ventilate the residual vapor / inert gas mixture of higher-lying compartments instead of the residual vapor inert gases of the compartment considered locally. This also leads to functional losses in the pre-cooler 2 and in the condensation part 1 of the corresponding compartment.
  • the invention aims to eliminate these disadvantages in all operating points of a steam condenser by avoiding a compensating flow of the residual steam / inert gas mixture in the air cooler 3.
  • a baffle 22 is arranged on the bottom of the air cooler 3 in the area of the compartment 10 on the cooling water inlet side 24 parallel to the support plates 5.
  • the baffle wall 22 is so high that condensate 23, which is stowed and flows down from neighboring compartments 10, hydraulically closes the cutouts 18 in all the support plates 5 over the entire bundle length.
  • the condensate 23 flows through the hydraulically closed recess 23 in the support plate 5 from to the adjacent compartment 10.
  • a compensating flow from compartment 10 compartment is prevented.
  • the invention is not limited to the exemplary embodiment shown and described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
EP97810090A 1996-03-15 1997-02-24 Condenseur de vapeur Expired - Lifetime EP0795729B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19610237A DE19610237A1 (de) 1996-03-15 1996-03-15 Dampfkondensator
DE19610237 1996-03-15

Publications (3)

Publication Number Publication Date
EP0795729A2 true EP0795729A2 (fr) 1997-09-17
EP0795729A3 EP0795729A3 (fr) 1999-02-10
EP0795729B1 EP0795729B1 (fr) 2000-09-27

Family

ID=7788406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810090A Expired - Lifetime EP0795729B1 (fr) 1996-03-15 1997-02-24 Condenseur de vapeur

Country Status (6)

Country Link
US (1) US5794686A (fr)
EP (1) EP0795729B1 (fr)
AU (1) AU712064B2 (fr)
CA (1) CA2199427A1 (fr)
DE (2) DE19610237A1 (fr)
HU (1) HU220753B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7124580B2 (en) * 2004-06-22 2006-10-24 Crown Iron Works Company Sub-zero condensation vacuum system
CN201203306Y (zh) * 2007-08-21 2009-03-04 高克联管件(上海)有限公司 一种带气体折流板的冷凝器
JP6326430B2 (ja) * 2014-01-23 2018-05-16 三菱日立パワーシステムズ株式会社 復水器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE580858C (de) * 1929-10-04 1933-07-18 Westinghouse Electric & Mfg Co Luftkuehler fuer Einwegoberflaechenkondensatoren mit durch Rohrstuetzbleche unterteilten Abschnitten
DE1948073A1 (de) * 1969-08-29 1971-03-25 Bbc Brown Boveri & Cie Verfahren zum Kondensieren von Wasserdampf und Anlage zur Durchfuehrung dieses Verfahrens
US3698476A (en) * 1970-12-31 1972-10-17 Worthington Corp Counter flow-dual pressure vent section deaerating surface condenser
US4236575A (en) * 1979-09-24 1980-12-02 Ecolaire Incorporated Tube bundle support plate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE423819C (de) * 1924-07-17 1926-01-11 Hermann Johs Schwabe Fa Verfahren und Vorrichtung zum Impraegnieren des auf Strick-, Wirk- u. dgl. Maschinen zu verarbeitenden Fadens
US3363678A (en) * 1966-06-28 1968-01-16 Ingersoll Rand Co Multi-pressure surface condenser
DE2935106C2 (de) * 1979-08-30 1983-09-29 Kraftwerk Union AG, 4330 Mülheim Regeleinrichtung für die Kondensatmenge in Kondensatoren
DE3732633A1 (de) * 1987-09-28 1989-04-06 Siemens Ag Kondensator fuer den wasser-dampf-kreislauf von kraftwerksanlagen
DE4311118A1 (de) * 1993-04-05 1994-10-06 Abb Management Ag Dampfkondensator
DE4422344A1 (de) * 1994-06-27 1996-01-04 Siemens Ag Kondensator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE580858C (de) * 1929-10-04 1933-07-18 Westinghouse Electric & Mfg Co Luftkuehler fuer Einwegoberflaechenkondensatoren mit durch Rohrstuetzbleche unterteilten Abschnitten
DE1948073A1 (de) * 1969-08-29 1971-03-25 Bbc Brown Boveri & Cie Verfahren zum Kondensieren von Wasserdampf und Anlage zur Durchfuehrung dieses Verfahrens
US3698476A (en) * 1970-12-31 1972-10-17 Worthington Corp Counter flow-dual pressure vent section deaerating surface condenser
US4236575A (en) * 1979-09-24 1980-12-02 Ecolaire Incorporated Tube bundle support plate

Also Published As

Publication number Publication date
CA2199427A1 (fr) 1997-09-15
HU220753B1 (hu) 2002-05-28
US5794686A (en) 1998-08-18
HUP9700592A3 (en) 2000-04-28
DE19610237A1 (de) 1997-09-18
AU712064B2 (en) 1999-10-28
HU9700592D0 (en) 1997-05-28
DE59702390D1 (de) 2000-11-02
EP0795729B1 (fr) 2000-09-27
EP0795729A3 (fr) 1999-02-10
HUP9700592A2 (en) 1997-11-28
AU1517397A (en) 1997-09-18

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