EP0337925B1 - Dampfkühler - Google Patents

Dampfkühler Download PDF

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Publication number
EP0337925B1
EP0337925B1 EP89730073A EP89730073A EP0337925B1 EP 0337925 B1 EP0337925 B1 EP 0337925B1 EP 89730073 A EP89730073 A EP 89730073A EP 89730073 A EP89730073 A EP 89730073A EP 0337925 B1 EP0337925 B1 EP 0337925B1
Authority
EP
European Patent Office
Prior art keywords
steam
apron
housing
flow
nozzle system
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 - Lifetime
Application number
EP89730073A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0337925A1 (de
Inventor
Helmut Sauerbrey
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to AT89730073T priority Critical patent/ATE76178T1/de
Publication of EP0337925A1 publication Critical patent/EP0337925A1/de
Application granted granted Critical
Publication of EP0337925B1 publication Critical patent/EP0337925B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • F22G5/123—Water injection apparatus

Definitions

  • the invention relates to a steam cooler with water injection according to the preamble of claim 1.
  • Steam coolers of this type for generating low-temperature steam from superheated steam while maintaining the steam pressure approximately belong to the generally known prior art. They are installed in steam lines via flange or welded connections and essentially consist of a tubular housing in which a nozzle system for central water injection is arranged. The water is usually injected in the direction of flow of the superheated steam to be cooled. So that the tubular housing of the steam cooler is not damaged under the influence of cold water (thermal stress), an inner tubular apron is arranged coaxially at a distance from the housing wall. The apron is held by welding cams that are connected to the apron and the housing wall.
  • Part of the superheated steam to be cooled enters the annular gap between the apron and the housing wall at the upper end of the apron and out of the latter again at the lower end of the apron.
  • the cooler internal current is enveloped by a hotter external current.
  • Temperature equalization of both partial flows takes place with a delay via the boundary layer of the partial flows.
  • the temperature decrease of the steam behind the injection point is measured after passing through a mixing section.
  • a distance that is at least 15 to 20 times the pipe diameter is normally to be maintained.
  • a mixing device for liquids of different temperatures is known from US-A-34 09 274, the liquid to be mixed being introduced tangentially through openings.
  • the connection area is double-walled for temperature compensation.
  • Another steam cooler is known from DE-A-19 49 477.
  • several different swirl devices equipped with guide vanes are provided. Some of these can be adjusted in their axial position.
  • a peripheral nozzle system is also required for water injection.
  • a superheated steam injection cooler with the features specified in the preamble of claim 1 is known from the generic DE-C-11 46 501.
  • the nozzle system for the steam inlet is located within an apron, so that the inlet from the side and beyond is close to the area of the outlet side of the steam from the cooler.
  • the object of the invention is to provide a steam cooler with the features of the preamble of claim 1, in which the compensation path for the steam temperature measurement at most 10 times the amount of the diameter without requiring a complex construction.
  • the invention provides that the annular gap existing between the apron and the housing wall on the side of the steam inlet is closed and is only open at the lower end of the apron. This prevents part of the superheated steam from being temporarily separated from the rest of the flow.
  • a flow displacement body is arranged coaxially to the housing axis in front of the lower end of the apron, guide vanes emanating from this flow displacement body in the radial direction, the surfaces of which are inclined to the axial flow direction of the steam.
  • the guide vanes which are tightly bound with the apron and the flow displacement body, give the flow a swirl around the housing axis.
  • the flow displacement body is preferably rotationally symmetrical, for example shaped as a truncated cone with a rounded head and foot part, the cone tip opposing the direction of flow.
  • FIGS. 1 and 2 in the axial longitudinal cross section or in plan view.
  • the steam cooler shown can be installed as a structural unit directly into a steam line by means of two circular seams on the front. It is of course also possible to design the connection as a flange connection.
  • the steam cooler has an essentially tubular housing with the cylindrical housing wall 1.
  • the cross section on the inlet side 10 for the superheated steam is smaller than that on the outlet side 13 for the cooled steam.
  • a nozzle system 4 is arranged centrally, to which the injection water required for steam cooling (possibly for finer distribution with the additional use of motive steam) is supplied via the water connection 9.
  • the nozzle system 4 preferably consists of several individual nozzles and is expediently designed as a swirl or circular nozzle system.
  • the spray direction of the nozzles is directed somewhat obliquely outwards in the direction of flow.
  • the cylindrical housing part 15 at the steam inlet 10 merges in the flow direction into a conical expansion part 11, which in turn is tightly connected to a welded part 3 of the same connection diameter designed as a double ring.
  • the double ring 3 has an H-shaped profile in cross section.
  • the upper leg of the h-profile 3 is tightly welded to the extension part 11, the inner lower leg with a tubular skirt 2 and the outer lower leg with the housing wall 1.
  • a flow displacement body 5 is preferably arranged coaxially to the housing axis at a distance which corresponds approximately to 2 to 3 times the housing diameter.
  • the flow displacement body 5 is preferably rotationally symmetrical, in particular approximately frustoconical in shape with a rounded head and foot part, the cone tip should point against the direction of flow.
  • the flow displacement body 5 is held by radially extending guide vanes which are fixedly connected to the skirt 2 and whose vane surfaces are inclined at an angle to the direction of flow.
  • the individual guide blades 6 can additionally be held together by a reinforcing ring 14.
  • the apron 2 is expediently supported by spacer cams 12 welded on one side either to the apron 2 or to the housing wall 1.
  • an annular space 8 is formed between the skirt 2 and the housing wall 1, which is open to the downstream end of the skirt 2.
  • the present internal pressure is absorbed by the housing parts 15, 11, 3 and 1.
  • the apron 2 ensures that the housing wall 1 is not exposed to strong temperature fluctuations due to the water injected into the injection chamber 7 via the nozzle system 4 for cooling the superheated steam.
  • a uniformly tempered saturated steam zone can be formed in the annular space 8, which is closed toward the steam inlet side 10 and is to be regarded as a dead zone in terms of flow technology.
  • the steam flow remains completely undivided and limited to the free cross section within the apron 2. Since the temperature distribution fluctuates greatly across the flow cross-section - the highest temperatures can be found in the area of the cooler axis - the internals 5, 6 aim to make the temperature more uniform by intensely swirling the flow.
  • the steam flow is torn open by the flow displacement body 5 in the central region, deflected into the peripheral regions and set into an additional swirl movement around the housing axis by the guide vanes.
  • two or more (shortened) sections with a double ring, apron, housing wall and flow displacement body with guide vanes can also be arranged one behind the other in the steam cooler.
  • the design makes it possible to drastically reduce the compensation distance for reliably determining the effective mixing temperature of the steam compared to the prior art. In many cases, a distance that is about 4 to 5 times the pipe diameter is sufficient.
  • Another major advantage results from the changed way of fastening the apron 2 to the housing wall 1 via the weld-in part 3. While the fastening by means of spacer cams welded on both sides in the prior art leads to very strong thermal tensions between the hot housing wall (part of the superheated steam flows continuously past it) and the apron which is colder due to the splashing water, which often causes damage to the radiator, extreme temperature gradients and consequent stresses on the supporting parts are completely avoided according to the invention, so that longer, trouble-free operation is made possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP89730073A 1988-03-17 1989-03-16 Dampfkühler Expired - Lifetime EP0337925B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89730073T ATE76178T1 (de) 1988-03-17 1989-03-16 Dampfkuehler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809678A DE3809678C1 (enrdf_load_stackoverflow) 1988-03-17 1988-03-17
DE3809678 1988-03-17

Publications (2)

Publication Number Publication Date
EP0337925A1 EP0337925A1 (de) 1989-10-18
EP0337925B1 true EP0337925B1 (de) 1992-05-13

Family

ID=6350412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89730073A Expired - Lifetime EP0337925B1 (de) 1988-03-17 1989-03-16 Dampfkühler

Country Status (3)

Country Link
EP (1) EP0337925B1 (enrdf_load_stackoverflow)
AT (1) ATE76178T1 (enrdf_load_stackoverflow)
DE (2) DE3809678C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112856384A (zh) * 2021-01-11 2021-05-28 内蒙古工业大学 一种自保护式减温水调节装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620703A1 (de) * 2012-01-25 2013-07-31 Siemens Aktiengesellschaft Wassereinspritzvorrichtung für ein Umleitdampfsystem einer Kraftwerksanlage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409274A (en) * 1967-11-22 1968-11-05 Combustion Eng Mixing apparatus for high pressure fluids at different temperatures
DE1949477A1 (de) * 1969-10-01 1971-05-27 Haschke & Wendet Kg Heissdampfkuehler
GB1557870A (en) * 1975-11-18 1979-12-12 Euro Tech Services Design & Co Steam desuperheating systems
GB1592153A (en) * 1977-12-23 1981-07-01 Abtec Ltd Spraying apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Sektion Chemie, Woche 88/6, 21. April 1988, Zusammenfassung Nr. Q 72, 88-11099/16, Derwent Publications Ltd.; London, GB; SU-A-1339347 (ODESS POLY) 23.09.1987 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112856384A (zh) * 2021-01-11 2021-05-28 内蒙古工业大学 一种自保护式减温水调节装置

Also Published As

Publication number Publication date
EP0337925A1 (de) 1989-10-18
DE3809678C1 (enrdf_load_stackoverflow) 1989-05-18
ATE76178T1 (de) 1992-05-15
DE58901368D1 (de) 1992-06-17

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