EP0352488A1 - Chaudière à vapeur à passage unique - Google Patents

Chaudière à vapeur à passage unique Download PDF

Info

Publication number
EP0352488A1
EP0352488A1 EP89111630A EP89111630A EP0352488A1 EP 0352488 A1 EP0352488 A1 EP 0352488A1 EP 89111630 A EP89111630 A EP 89111630A EP 89111630 A EP89111630 A EP 89111630A EP 0352488 A1 EP0352488 A1 EP 0352488A1
Authority
EP
European Patent Office
Prior art keywords
tube
tubes
group
pipe
steam generator
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
EP89111630A
Other languages
German (de)
English (en)
Other versions
EP0352488B1 (fr
Inventor
Eberhard Wittchow
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.)
Siemens AG
Original Assignee
Siemens 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8199138&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0352488(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to JP19121489A priority Critical patent/JPH0271002A/ja
Priority to DK365789A priority patent/DK365789A/da
Publication of EP0352488A1 publication Critical patent/EP0352488A1/fr
Application granted granted Critical
Publication of EP0352488B1 publication Critical patent/EP0352488B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/146—Tube arrangements for ash hoppers and grates and for combustion chambers of the cyclone or similar type out of the flues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/061—Construction of tube walls
    • F22B29/062—Construction of tube walls involving vertically-disposed water tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/12—Forms of water tubes, e.g. of varying cross-section
    • F22B37/125—Bifurcates

Definitions

  • the invention relates to a once-through steam generator according to the preamble of claim 1.
  • Such a continuous steam generator is known from British Patent 1 163 555.
  • the tubes of the first tube group of the tube wall of the vertical throttle cable of this once-through steam generator have an inlet header and the tubes of the bottom have an outlet header.
  • Four approximately equidistant connecting pipes are provided. Each of these connecting pipes is connected at one end to one collector and at the other end to the other collector and connects the two collectors in terms of flow.
  • Both the bottom and the tube wall of the vertical throttle cable of this once-through steam generator form evaporator heating surfaces.
  • wet steam formed in the pipes of the floor is transferred to the Disassembled pipes of the first pipe group. Therefore, wet steam with a uniform temperature also reaches the outlet ends of all pipes of the first pipe group, so that no thermal stresses occur even at steam pressure below the critical pressure.
  • a further development according to claim 2 prevents segregation of the wet steam emerging from the first pipe group on its way to the second pipe group at steam pressure below the critical pressure, so that wet steam with approximately the same steam content also occurs in all pipes of the second pipe group. This also leads to an equalization of the temperature of the tubes of the second tube group at their outlet ends and thus to avoid thermal stresses in the tube wall.
  • the heat absorption of the tubes of the second tube group can be predetermined in an advantageous manner by a further development according to patent claims 4 to 7. This also enables a further equalization of the temperature of the tubes of the second tube group at their outlet ends.
  • the development according to claim 8 also causes a more uniform temperature profile in the tube wall at the outlet ends of the tubes to avoid thermal stresses.
  • FIGS. 3 to 5 show modified sections from the development of the vertical throttle cable according to FIG. 1.
  • the vertical throttle cable according to FIG. 1 has a rectangular cross section and has a tube wall 2 and a base 3 in the form of a funnel. All pipes 4 and 5 of the pipe wall 2 are arranged vertically and welded to one another in a gas-tight manner on their longitudinal sides.
  • the bottom 3 is formed by tubes 6, which are also welded to one another in a gas-tight manner on their longitudinal sides. These tubes 6 are straight, but they can also be helical.
  • the bottom 3 can also be arranged flat and horizontal or slightly inclined.
  • tubes 4 and / or 5 of tube wall 2 are curved and run on the outside of the vertical throttle cable. Similar openings can also be formed for air nozzles, flue gas nozzles, soot blowers, observation hatches, etc.
  • the tubes 6 of the funnel-shaped base 3 are connected at their inlet ends to inlet manifolds 8.
  • the vertically arranged tubes 4 of the tube wall 2 form a first tube group.
  • Each tube 4 of this first tube group is connected in terms of flow at the inlet end to the outlet ends of two tubes 6 of the base 3.
  • the tubes 4 of the first tube group open into an outlet header 9 with their outlet ends. The outlet ends of the two tubes 6 thus merge into the inlet end of each tube 4.
  • Each tube 5 of a second tube group is located between two tubes 4 of the first tube group, on which it is attached to its Long sides is welded gas-tight.
  • each tube 4 of the first tube group is located between two tubes 5 of the second tube group, on which it is also welded gas-tight on its long sides.
  • all tubes 5 of the second tube group are connected with their inlet ends to a further inlet header 10 and with their outlet ends to a further outlet header 11.
  • the outlet header 9 of the pipes 4 of the first pipe group of the pipe wall 2 is connected by a pipe 12 the inlet header 10 of the tubes 5 of the second tube group connected in terms of flow without the interposition of tubes of the bottom 3.
  • the pipe 12 is located on the outside of the vertical throttle cable and contains a distributor 13. Four pipes 14 lead from this distributor 13 to the inlet header 10.
  • the wet steam is not heated on its way from the outlet header 9 to the inlet header 10 and therefore enters all tubes 5 of the second tube group with the same vapor content.
  • heat is supplied to it uniformly, so that in all tubes 5 there is uniformly only wet steam, saturated steam or superheated steam at their outlet ends and is fed into the outlet collector 11. Therefore, thermal stresses in the tube wall 2 at vapor pressure below the critical pressure are excluded even if the tubes 6 of the bottom 3 are of different lengths and absorb heat differently.
  • the tubes 5 form the second tube group in the tube wall 2 at a predetermined height H 1 an upper end by exiting there from the tube wall 2 to the outside of the vertical throttle cable.
  • each tube 4 of the first tube group flows into two vertically arranged, also belonging to the first tube group branch tubes 4 a and 4 b of the tube wall 2, which are connected with their outlet ends to the outlet header 9. This will only make one comparatively small amount of heat is transferred to the tubes 5 of the second tube group, and the temperature is further evened out at the outlet ends of the tubes 5, which open into the outlet header 11, in order to avoid thermal stresses.
  • the tubes 5 of the second tube group of the vertical throttle cable form a lower end at a predetermined height H 2 by entering the tube wall 2 from the outside of the vertical throttle cable.
  • a predetermined height H2 flow two pipes 4 of the first tube group in a vertically arranged single tube 4c of the tube wall 2, which also belongs to the first tube group and is located above the height H2.
  • each tube 4 of the first tube group is connected in terms of flow at the inlet end to the outlet ends of three tubes 6 of the base 3. Furthermore, two tubes 5 of the second tube group of the tube wall 2, which are welded to one another in a gas-tight manner on their long sides, are arranged between two tubes 4 of the first tube group and welded gas-tight with long sides on the long sides of these tubes 4.
  • the number of tubes 5 of the second tube group connected to the collectors 10 and 11 is thus twice as large as the number of tubes 4 of the first tube group connected to the tubes 6 and the outlet header 9. This also has an effect as with the configuration according to FIG. 3.
  • the outlet collector for the pipes of the second pipe group of the pipe wall can be connected in terms of flow through a pipe to other pipes of the pipe wall of the vertical gas flue, which do not belong to the first or second pipe group, or to inlet collectors of superheater heating surfaces of the continuous steam generator.
  • the tubes of the tube wall of the vertical throttle cable and the bottom can have helically guided inner fins, so that the water content of wet steam which flows through these tubes predominantly accumulates on the inside of the tubes. This results in a relatively low and uniform temperature of the pipes and also prevents thermal stresses in the pipe wall and in the floor.
  • Flue gas flowing out of the vertical gas flue can also be in the form of a flue gas circulation after cooling on heating surfaces of the once-through steam generator, e.g. can be returned to the vertical throttle cable with flue gas nozzles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP89111630A 1988-07-26 1989-06-26 Chaudière à vapeur à passage unique Expired - Lifetime EP0352488B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP19121489A JPH0271002A (ja) 1988-07-26 1989-07-24 貫流ボイラ
DK365789A DK365789A (da) 1988-07-26 1989-07-24 Gennemstroemningsdampgenerator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP88112051 1988-07-26
EP88112051 1988-07-26

Publications (2)

Publication Number Publication Date
EP0352488A1 true EP0352488A1 (fr) 1990-01-31
EP0352488B1 EP0352488B1 (fr) 1993-10-06

Family

ID=8199138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111630A Expired - Lifetime EP0352488B1 (fr) 1988-07-26 1989-06-26 Chaudière à vapeur à passage unique

Country Status (3)

Country Link
US (1) US4926799A (fr)
EP (1) EP0352488B1 (fr)
DE (1) DE58905817D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004870A1 (fr) * 1992-08-19 1994-03-03 Siemens Aktiengesellschaft Generateur de vapeur
DE19651678A1 (de) * 1996-12-12 1998-06-25 Siemens Ag Dampferzeuger
RU2559651C2 (ru) * 2010-12-13 2015-08-10 Альстом Текнолоджи Лтд Парогенератор с наддувом, имеющий стеночную нагреваемую поверхность, и способ его эксплуатации

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5390631A (en) * 1994-05-25 1995-02-21 The Babcock & Wilcox Company Use of single-lead and multi-lead ribbed tubing for sliding pressure once-through boilers
DE4431185A1 (de) * 1994-09-01 1996-03-07 Siemens Ag Durchlaufdampferzeuger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1167371A (fr) * 1956-03-02 1958-11-24 Babcock & Wilcox France Générateur de vapeur à rayonnement
GB1163555A (en) * 1965-10-22 1969-09-10 Foster Wheeler Corp Once through vapor generators
DE1426702A1 (de) * 1964-05-27 1969-10-23 Foster Wheeler Corp Zwangsumlauf-Dampferzeuger
US3498270A (en) * 1968-05-01 1970-03-03 Foster Wheeler Corp All-welded furnace construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB879817A (en) * 1959-07-10 1961-10-11 Babcock & Wilcox Ltd Improvements in vapour generators
US3872836A (en) * 1973-09-18 1975-03-25 Foster Wheeler Corp Coal-fired generator of medium to large capacity
US4294200A (en) * 1979-12-06 1981-10-13 Foster Wheeler Energy Corporation Variable pressure vapor generator utilizing crossover circuitry for the furnace boundary wall fluid flow tubes
EP0133453B1 (fr) * 1983-08-05 1988-07-27 GebràœDer Sulzer Aktiengesellschaft Echangeur de chaleur, en particulier générateur de vapeur
CN1016532B (zh) * 1985-09-23 1992-05-06 劳舍兄弟有限公司 燃烧矿物燃料的蒸汽发生器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1167371A (fr) * 1956-03-02 1958-11-24 Babcock & Wilcox France Générateur de vapeur à rayonnement
DE1426702A1 (de) * 1964-05-27 1969-10-23 Foster Wheeler Corp Zwangsumlauf-Dampferzeuger
GB1163555A (en) * 1965-10-22 1969-09-10 Foster Wheeler Corp Once through vapor generators
US3498270A (en) * 1968-05-01 1970-03-03 Foster Wheeler Corp All-welded furnace construction

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004870A1 (fr) * 1992-08-19 1994-03-03 Siemens Aktiengesellschaft Generateur de vapeur
DE19651678A1 (de) * 1996-12-12 1998-06-25 Siemens Ag Dampferzeuger
US6189491B1 (en) 1996-12-12 2001-02-20 Siemens Aktiengesellschaft Steam generator
RU2559651C2 (ru) * 2010-12-13 2015-08-10 Альстом Текнолоджи Лтд Парогенератор с наддувом, имеющий стеночную нагреваемую поверхность, и способ его эксплуатации
US9163834B2 (en) 2010-12-13 2015-10-20 Alstom Technology Ltd Forced flow steam generator having wall heating surface and method for its operation

Also Published As

Publication number Publication date
US4926799A (en) 1990-05-22
DE58905817D1 (de) 1993-11-11
EP0352488B1 (fr) 1993-10-06

Similar Documents

Publication Publication Date Title
EP0349834B1 (fr) Chaudière à vapeur à passage unique
EP0944801B1 (fr) Chaudiere a vapeur
EP0657010B2 (fr) Generateur de vapeur
DE19929088C1 (de) Fossilbeheizter Dampferzeuger mit einer Entstickungseinrichtung für Heizgas
WO2006032556A1 (fr) Generateur de vapeur en continu chauffe a l'aide d'un combustible fossile
EP1144910B1 (fr) Generateur de vapeur chauffe avec un combustible fossile
EP1660812B1 (fr) Générateur de vapeur à passage unique et méthode pour faire fonctionner ledit générateur de vapeur à passage unique
EP0352488B1 (fr) Chaudière à vapeur à passage unique
DE3604842A1 (de) Heizkessel
EP1554522B1 (fr) Procede pour exploiter un generateur de vapeur de conception horizontale
WO2010102869A2 (fr) Évaporateur continu
DE3511877A1 (de) Durchlaufdampferzeuger
DE960723C (de) Zyklonfeuerung
DE381001C (de) Wasserrohrkessel
DE1949963A1 (de) Dampfkessel mit einem Wasserraum
DE1176155B (de) Steilrohrkessel mit oberem, gekuehltem Rueckwandvorsprung
DE662967C (de) Wasserrohrlokomotivkessel
DE102022201290A1 (de) Wärmetauscher
DE1576820C3 (de) Zweiflammrohrkessel
DE2916608C2 (de) In Gaszüge einzubauender Röhrenluftvorwärmer
DE2540024A1 (de) Dampferzeuger mit einer brennkammer und mindestens einem nachgeschalteten kesselzug
DE1401331C3 (de) Einzügiger Wasserrohrkessel. Ausscheidung aus: 1156087
DD103956B1 (de) Gas- und/oder oelgefeuerter wasserrohrkessel fuer die erzeugung von sattdampf, heissdampf oder warmwasser
DE2231860A1 (de) Wasserrohrkessel
DE2157436A1 (de) Verdampferheizflache, insbesondere fur Dampferzeuger nach dem Baukastenprinzip, vorzugsweise mit Membranrohrwanden

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19900226

17Q First examination report despatched

Effective date: 19910313

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT

REF Corresponds to:

Ref document number: 58905817

Country of ref document: DE

Date of ref document: 19931111

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19931214

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: EVT ENERGIE UND VERFAHRENSTECHNIK GMBH

Effective date: 19940706

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950518

Year of fee payment: 7

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

27C Opposition proceedings terminated

Effective date: 19950514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960626

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960819

Year of fee payment: 8

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960626

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050626