EP0976998A1 - Condenseur de vapeur - Google Patents

Condenseur de vapeur Download PDF

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Publication number
EP0976998A1
EP0976998A1 EP98810737A EP98810737A EP0976998A1 EP 0976998 A1 EP0976998 A1 EP 0976998A1 EP 98810737 A EP98810737 A EP 98810737A EP 98810737 A EP98810737 A EP 98810737A EP 0976998 A1 EP0976998 A1 EP 0976998A1
Authority
EP
European Patent Office
Prior art keywords
cover plate
condenser
condensate
cooler
bundle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98810737A
Other languages
German (de)
English (en)
Inventor
Peter Dr. Baumann
Walter Novak
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.)
ABB Asea Brown Boveri Ltd
ABB AB
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
Priority to EP98810737A priority Critical patent/EP0976998A1/fr
Publication of EP0976998A1 publication Critical patent/EP0976998A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a steam condenser with pipes, the cooling water are flowed through and on which steam is deposited by the turbine.
  • the Pipes are grouped into tube bundles that are supported by bundle supports and in individual compartments are divided.
  • the tube bundles point over their entire Lengthen a cavity in which a cooler does not accumulate condensable gases is arranged, which are sucked off via a suction pipe.
  • the invention relates in particular to measures for controlled drainage of the condensate to improve the heat transfer to the Pipes.
  • Such a steam condenser is described for example in EP 0 384 200.
  • condenser tubes are arranged in several sub-bundles in a condenser housing. These sub-bundles are each supported by support plates or bundle carriers and divided into individual compartments.
  • the steam flows from the turbine via an exhaust pipe into the steam chamber of the condenser, in which it is distributed via flow channels. These flow channels narrow in the course of the flow direction, so that a pressure minimum is reached at the level of the air cooler.
  • the steam flows freely onto all the outside tubes of the partial bundles, part of the steam condenses on the surface thereof, the remaining steam flows into the interior of the tube bundle in the further course of the flow, the flow resistance being relatively small here due to a small row depth.
  • a good efficiency of a condenser is achieved, among other things, by keeping the condenser pressure as low as possible.
  • the cooler is used to collect non-condensable gases, essentially air, and to remove them from the condenser via an exhaust pipe. It lies at the point in the bundle where the minimum pressure prevails and essentially has a cover plate lying horizontally, a suction chamber with a suction pipe and a suction channel.
  • Cooler tubes are also arranged between the cover plate and the suction channel and are protected by the cover plate against condensate flowing down from the bundle area located above.
  • the non-condensable gases collect in the bundle zone with the lowest pressure, ie between the cover plate and the suction channel.
  • At the location of the cover plate there are numerous orifices arranged over the entire length of the condenser, which form the boundary between the condenser and the suction space for the non-condensable gases. This space is connected to a suction device via pipes, whereby the gases (steam-air mixture) are sucked out of the condensation area through the orifices. Any condensate can flow back into the slightly inclined suction channel.
  • the heat transfer is particularly favorable when a thin condensate film is present on the tube, from which drops quickly form and flow off the tube.
  • a thicker and continuous condensate film has a lower heat transfer coefficient.
  • measures are taken so that the condenser is vented as well as possible and the pipes are not subjected to excessive condensate from the pipes above them.
  • One of these measures is, for example, arranging the pipes at a sufficient distance from one another so that the condensate runs down between the pipes directly into a condensate collection vessel without coming into contact with the pipes underneath. In the area of the cooler, however, condensate flows from the cover plate to the pipes underneath.
  • the object of the invention to provide a Steam condenser to create the condensation performance for the Heat exchange of the condenser tubes in the area of the cooler is optimized.
  • the object is achieved by a capacitor consisting of a There are a plurality of tubes, which are combined in bundles, the Bundles of supports are supported and divided into compartments, each one Cavity for the collection and suction of non-condensable gases and a cooler with a cover plate, a suction chamber, several panels have between the condenser and suction chamber and a suction channel.
  • the cooler extends across all compartments over the entire length of the entire Bundle.
  • the cover plate has the purpose in each compartment a controlled condensate drainage a fold on which the condensate catches, that runs down from the upper part of the bundle above it, and it prevents access to the condenser tubes under the cover plate.
  • the Cover plate is according to the inclination of the pipes in the flow direction of the Cooling water slightly inclined towards the bundle carriers, so that the collected Condensate flows down there.
  • the condensate flows into a further Drainage channel and reaches the lowest point of the cover plates for the bundle beams in the compartment, from where it goes through a drain opening directly into the condensate collector is derived and from there, for example, back to the Water-steam cycle of a power plant.
  • FIG. 1 shows a steam condenser which, together with the (not shown) Turbine arranged at ground level and with it axially or via an exhaust pipe laterally connected to the turbine shaft.
  • the capacitor contains several one above the other and horizontally arranged tube bundle 1, the bundle carrier 13th supported and divided into several compartments. It is in every tube bundle 1 shows the condenser tubes 2 and a cooler 3 according to the invention.
  • FIG. 2 shows a section of a tube bundle 1 with condenser tubes 2 through which cooling water flows.
  • the majority of the tubes 2 are indicated by crossing lines.
  • the tube bundle 1 has a cooler 3, which is typical for this horizontal arrangement and is arranged in a cavity 4 in the bundle 1.
  • the cavity 4 is located at the point of the lowest pressure within the tube bundle 1.
  • a mixture of water vapor and non-condensable gases accumulates, which is sucked out of the condenser via the cooler 3 and a suction line, not shown.
  • the cooler 3 has a cover plate 5 and a suction channel 6 at the top, between which further condenser tubes 2 are arranged. The mixture of water vapor and gases flows through the cooler, with most of the steam condensing here.
  • the air cooler also has the effect that the steam-gas mixture is accelerated by the action of the suction, which improves the conditions for heat transfer.
  • the bundle is designed in such a way that the steam suction in the direction of the cavity 4 is uniform over all the tubes adjacent to the cavity, which results in a homogeneous pressure drop and thus a clear flow of the steam into the cooler 3.
  • the steam-gas mixture flows through orifices 7 into the suction chamber 9. These orifices are located at the youngest point of the cover plate 5 and represent the physical separation of the condenser chamber from the suction chamber 9. Condensate accumulating from the suction chamber 9 flows into the drainage channel, where it flows through an opening into the condensate collector.
  • the non-condensable gases are sucked out of the condenser by a suction pipe, not shown.
  • the cover plate 5 has a fold 10 along its edge, which is the farthest from the panel 7, in that the plate 5 is angled and forms a raised edge.
  • Condensate which runs down from the pipes 2 above the cooler onto the cover plate 5, is collected at the fold 10 and prevented from flowing down onto the pipes below. Instead, this condensate flows via the cover plate 5 to a drainage channel 11, which is then arranged along the edge of the cover plate 5 along the suction chamber 9. The condensate is collected in the drainage channel 11 and flows through its inclination to the closest bundle carrier.
  • a drain opening is arranged, through which the condensate flows, falls onto tie rods 12 and flows over them into a condensate collecting vessel, not shown.
  • the tie rods 12 serve to mechanically support the tube bundle 1 and their function is not impaired by the condensate flowing down.
  • the pipes 2 in the area of the cooler 3 are not excessively loaded with condensate, but are only acted upon by the condensate that has formed on them.
  • an improved heat transfer and an increased condensation efficiency are achieved for these tubes.
  • FIG. 3 shows a top view of the cover plate 5 of a cooler in the area of a Compartments of a tube bundle, which is delimited by two bundle carriers 13.
  • the tubes 2 of a tube bundle are each indicated by arrows Flow direction of the cooling water slightly inclined. According to this tendency, too Cover plates 5 inclined in each compartment of a tube bundle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP98810737A 1998-07-30 1998-07-30 Condenseur de vapeur Withdrawn EP0976998A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98810737A EP0976998A1 (fr) 1998-07-30 1998-07-30 Condenseur de vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810737A EP0976998A1 (fr) 1998-07-30 1998-07-30 Condenseur de vapeur

Publications (1)

Publication Number Publication Date
EP0976998A1 true EP0976998A1 (fr) 2000-02-02

Family

ID=8236224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810737A Withdrawn EP0976998A1 (fr) 1998-07-30 1998-07-30 Condenseur de vapeur

Country Status (1)

Country Link
EP (1) EP0976998A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100498191C (zh) * 2006-12-29 2009-06-10 东方电气集团东方汽轮机有限公司 电站凝汽器模拟蒸汽流动流程装置
WO2013117730A3 (fr) * 2012-02-10 2014-08-28 Alstom Technology Ltd Cycle eau/vapeur et son procédé d'actionnement
CN118208864A (zh) * 2024-04-28 2024-06-18 江苏润睿生物科技有限公司 一种具有导流结构的脱水冷凝器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845549A (en) * 1931-06-26 1932-02-16 Westinghouse Electric & Mfg Co Condenser
US1855231A (en) * 1931-11-19 1932-04-26 Worthington Pump & Mach Corp Surface condenser
US2111240A (en) * 1936-02-19 1938-03-15 Worthington Pump & Mach Corp Surface condenser
US2180840A (en) * 1937-11-27 1939-11-21 Westinghouse Electric & Mfg Co Condenser apparatus
JPS6053783A (ja) * 1983-09-05 1985-03-27 Mitsubishi Heavy Ind Ltd 凝縮器
EP0384200A1 (fr) 1989-02-23 1990-08-29 Asea Brown Boveri Ag Condenseur à vapeur
DE4141132C1 (fr) * 1991-12-13 1993-02-11 Preussenelektra Ag, 3000 Hannover, De

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845549A (en) * 1931-06-26 1932-02-16 Westinghouse Electric & Mfg Co Condenser
US1855231A (en) * 1931-11-19 1932-04-26 Worthington Pump & Mach Corp Surface condenser
US2111240A (en) * 1936-02-19 1938-03-15 Worthington Pump & Mach Corp Surface condenser
US2180840A (en) * 1937-11-27 1939-11-21 Westinghouse Electric & Mfg Co Condenser apparatus
JPS6053783A (ja) * 1983-09-05 1985-03-27 Mitsubishi Heavy Ind Ltd 凝縮器
EP0384200A1 (fr) 1989-02-23 1990-08-29 Asea Brown Boveri Ag Condenseur à vapeur
DE4141132C1 (fr) * 1991-12-13 1993-02-11 Preussenelektra Ag, 3000 Hannover, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 187 (M - 401) 3 August 1985 (1985-08-03) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100498191C (zh) * 2006-12-29 2009-06-10 东方电气集团东方汽轮机有限公司 电站凝汽器模拟蒸汽流动流程装置
WO2013117730A3 (fr) * 2012-02-10 2014-08-28 Alstom Technology Ltd Cycle eau/vapeur et son procédé d'actionnement
CN104093942A (zh) * 2012-02-10 2014-10-08 阿尔斯通技术有限公司 水/蒸汽循环和用于操作其的方法
CN104093942B (zh) * 2012-02-10 2015-10-21 阿尔斯通技术有限公司 水/蒸汽循环和用于操作其的方法
US9453428B2 (en) 2012-02-10 2016-09-27 Alstom Technology Ltd Water/steam cycle and method for operating the same
CN118208864A (zh) * 2024-04-28 2024-06-18 江苏润睿生物科技有限公司 一种具有导流结构的脱水冷凝器

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