EP0197378A1 - Durchlaufdampferzeuger - Google Patents

Durchlaufdampferzeuger Download PDF

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Publication number
EP0197378A1
EP0197378A1 EP19860103708 EP86103708A EP0197378A1 EP 0197378 A1 EP0197378 A1 EP 0197378A1 EP 19860103708 EP19860103708 EP 19860103708 EP 86103708 A EP86103708 A EP 86103708A EP 0197378 A1 EP0197378 A1 EP 0197378A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
riser
steam generator
riser pipe
inlet
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.)
Ceased
Application number
EP19860103708
Other languages
German (de)
English (en)
French (fr)
Inventor
Eberhard Dipl.-Ing. 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
Kraftwerk Union AG
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
Application filed by Kraftwerk Union AG, Siemens AG filed Critical Kraftwerk Union AG
Publication of EP0197378A1 publication Critical patent/EP0197378A1/de
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
    • F22B31/003—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type with tubes surrounding the bed or with water tube wall partitions
    • 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
    • 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
    • F22B29/08—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 operating with fixed point of final state of complete evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
    • F22G7/14—Steam superheaters characterised by location, arrangement, or disposition in water-tube boilers, e.g. between banks of water tubes

Definitions

  • the invention relates to a once-through steam generator according to the preamble of patent claim 1.
  • Such a continuous steam generator is known from Figure 2 on page 293 in conjunction with Figure 7 on page 295 from "VGB Kraftwerkstechnik 64", Issue 4, April 1984.
  • a third riser pipe group is provided, the riser pipes of which are connected to a third inlet header and a third outlet header.
  • the flow of this third riser group is connected in series to the first and second riser groups via a flow pipe connected to the second outlet header and the third inlet header.
  • the third outlet header is located at the top of the combustion chamber, while the third inlet header and the first and second outlet header are located between - the top and bottom of the combustion chamber, so that the riser pipes of the first two riser pipe groups do not reach the top of the combustion chamber and the risers of the third riser group are not led to the lower end of the combustion chamber.
  • two third superheater heating surfaces are connected downstream of the third outlet collector. Between the two superheater heating surfaces is a pressure control valve, which is dependent on the pressure in the third outlet manifold.
  • the well-known continuous steam generator has coal dust combustion with 1 coal dust burners, which are arranged on the side walls of the combustion chamber at the level of the first and second riser groups.
  • the coal dust burners generate particularly hot flames and flue gases and heat the first and second riser pipe groups of the combustion chamber wall particularly strongly.
  • the third group of risers is not heated as much by the coal dust burners. Therefore, the flow velocity of the water vapor mixture and thus the pressure loss is much lower in it than in the first and in the second riser group.
  • the pressure control valve connected between the two superheater heating surfaces ensures supercritical pressure in the system formed by the three riser pipe groups with their inlet and outlet collectors and thereby prevents water and steam from separating, especially in the second and third inlet collectors. This prevents individual risers of the second and third riser groups from being predominantly exposed to water and others to predominantly steam, which would lead to uneven heating of the individual risers and to mechanical thermal stresses within the riser groups in the combustion chamber wall.
  • the high supercritical steam pressure requires a large drive power of a feed water pump assigned to the continuous steam generator and thus high operating costs.
  • the invention has for its object to develop the known continuous steam generator and its operation not only at supercritical pressure, but also at each to allow any pressure below the critical pressure.
  • the combustion can take place at a temperature between 800 ° C and 900 ° C due to the fluidized bed combustion.
  • This low combustion temperature means that only relatively little heat is transferred to the riser pipe groups of the combustion chamber wall.
  • the heating of the risers takes place almost uniformly over the entire height of the combustion chamber, so that all risers are flowed through at the same flow rate.
  • the outlet headers for all riser pipe groups can therefore also be arranged at the top end of the combustion chamber wall. This considerably simplifies the construction of the once-through steam generator and lowers its production costs.
  • the continuous steam generator according to FIGS. 2 and 2 has a combustion chamber 2, which is followed by a convection chamber 30 on the flue gas side.
  • the once-through steam generator is operated with fluidized bed combustion.
  • combustion chamber 2 therefore has a row of supply nozzles 4 for air on the combustion chamber base 3, which do not represent an ash discharge.
  • Such an ash discharge can be arranged on the combustion chamber base 3 in addition to the feed nozzles 4 and is not shown in FIG. 1.
  • an air supply line 5 opens, through which the air for the supply nozzles 4 directed into the combustion chamber 2 is supplied with excess pressure.
  • the combustion chamber wall of the combustion chamber 2 is gas-tight and has vertical tubes and has three riser tube groups 6, 8 and 10.
  • These riser pipe groups 6, 8 and 10 are formed by vertical riser pipes, each of which has two Long sides are welded gas-tight with another riser. There is usually still a bridge between two riser pipes.
  • a riser pipe of the riser pipe group 6 is welded to a riser pipe of the riser pipe group 8 or a riser pipe of the riser pipe group 8 is welded to a riser pipe of the riser pipe group 10. All riser pipe groups 6, 8 and 10 are therefore mounted in the combustion chamber wall with riser pipes arranged side by side.
  • the vertical risers of the riser group 6 are in terms of flow at their lower end at an inlet header 12 and at their upper end at an outlet header 13, the vertical risers of the riser group 8 at their lower end at an inlet header 18 and at their upper end at an outlet header 19 and the vertical risers of Riser pipe group 10 is connected to an inlet header 20 at its lower end and to an inlet header 21 at its upper end. All outlet collectors 13, 19 and 21 are therefore located at the upper end of the combustion chamber 2 and all inlet collectors 12, 18 and 20 at the lower end of the combustion chamber 2.
  • the combustion chamber 2 can be attached in a hanging manner because of its vertically tube-shaped combustion chamber wall.
  • This solid fuel can consist, for example, of coal with a grain size of up to approximately 20 mm, which together with conveying gas, e.g. B. air is blown into the combustion chamber 2 through a delivery pipe 23 connected to the inlet opening 22 and is whirled up by the air from the feed nozzles 4.
  • conveying gas e.g. B.
  • air is blown into the combustion chamber 2 through a delivery pipe 23 connected to the inlet opening 22 and is whirled up by the air from the feed nozzles 4.
  • a further flow tube 9 is connected in terms of flow to the outlet header 19 of the riser tube group 8 and to the inlet header 20 of the riser tube group 10, which is also located on the outside of the combustion chamber wall of the combustion chamber 2 and cannot be seen in FIG. 1.
  • An superheater heating surface 30, an additional heating surface 31 and a feed water preheating heating surface 32 are arranged within the convection chamber 29 of the continuous steam generator which is connected downstream of the combustion chamber 2 at the upper end on the flue gas side.
  • the feed water preheater heating surface 32 is fed by a feed water pump 33 and is flow-through the inlet header 12 and thus also the system of riser pipe groups 6, 8 and 10 with their inlet and outlet header 12, 13; 18, 19 and 20, 21 upstream.
  • the superheater heating surface 30, as shown in FIG. 2, is connected downstream of the outlet collector 21.
  • a live steam outlet pipeline 34 of the superheater heating surface 30 can lead to a steam turbine, not shown.
  • the additional heating surface 31 can advantageously flow between the feed water preheater heating surface 32 and the inlet header 12, that is between the feed water preheater heating surface 32 and the system of riser tubes of riser tube groups 6, 8 and 10 and inlet and outlet headers 12, 13; 18, 19 and 20, 21 can be switched. Due to the fluidized bed combustion in the combustion chamber 2, the heat absorption by the riser pipes of the individual riser pipe groups 6, 8 and 10, which is relatively small and almost uniform over the pipe length, allows the additional heating surface 31 in the circuit according to FIG. 3 as the evaporator heating surface and the riser pipe groups 6, 8 and 10 are effective as superheater heating surfaces without inadmissibly high temperatures occurring on the tubes of the combustion chamber wall of the combustion chamber 2. This means a significant reduction in the manufacturing costs for the continuous steam generator, since the flow of its heating surfaces is approximated in terms of flow to the ideal countercurrent principle, with which, as is known, the smallest heating surface dimensions can be achieved.
  • the additional heating surface 31 can also, as Fig. 4 shows, advantageously in terms of flow z. B. in the flow tube 7 between the outlet header 13 and the inlet header 18.
  • the riser pipe group 6 can act as an evaporator heating surface and the riser pipe groups 8 and 10 can act as superheater heating surfaces.
  • the combustion chamber wall of the combustion chamber 2 is then both during the start-up of the once-through steam generator, when the riser tube group 6, which acts as the evaporator heating surface, flows safely through water, but still generates little cooling steam, as well as in malfunctions such as failure of the feed water pump 33, in which the Flow through the riser pipe group 6 stops, but the flow in the two riser pipe groups 8 and 10 is still maintained due to the steam extraction at the live steam outlet pipe 34 of the superheater heating surface 30, well cooled.
  • a riser pipe of one riser pipe group 6 is welded on both longitudinal sides to a riser pipe of the other riser pipe group 8 and vice versa.
  • a water-steam separating device 40 consisting of a separating bottle can be connected, for example, in the flow pipe 7, which is connected in terms of flow to the outlet header 13 and the inlet header 18.
  • this water-steam separating device which is arranged on the outside of the combustion chamber wall, water can be separated from the water-steam mixture flowing through it, which comes from the riser pipe group 6, which acts as an evaporator heating surface, during the start-up of the continuous steam generator.
  • the steam is separator water vapor passed from the superheater heating surface 40 in acting as a riser pipe group 7, while the separated water p, for example, with an unillustrated pump for inlet header 12 of the Steigrohrgrup e may be returned.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
EP19860103708 1985-04-01 1986-03-19 Durchlaufdampferzeuger Ceased EP0197378A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853511877 DE3511877A1 (de) 1985-04-01 1985-04-01 Durchlaufdampferzeuger
DE3511877 1985-04-01

Publications (1)

Publication Number Publication Date
EP0197378A1 true EP0197378A1 (de) 1986-10-15

Family

ID=6266997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860103708 Ceased EP0197378A1 (de) 1985-04-01 1986-03-19 Durchlaufdampferzeuger

Country Status (5)

Country Link
EP (1) EP0197378A1 (ja)
JP (1) JPS61231301A (ja)
DE (1) DE3511877A1 (ja)
DK (1) DK140286A (ja)
FI (1) FI860703A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698659A1 (fr) * 1992-12-02 1994-06-03 Stein Industrie Procédé de récupération de chaleur en particulier pour cycles combinés appareillage pour la mise en Óoeuvre du procédé et installation de récupération de chaleur pour cycle combiné.
WO1995007437A1 (en) * 1993-09-07 1995-03-16 Kvaerner Pulping Technologies Ab Steam boiler
US5755187A (en) * 1993-09-08 1998-05-26 Gotaverken Energy Ab Steam boiler with externally positioned superheating means
RU2487298C1 (ru) * 2011-12-22 2013-07-10 Открытое акционерное общество "Всероссийский научно-исследовательский институт по эксплуатации атомных электростанций" (ОАО "ВНИИАЭС") Струйный аппарат для парогенератора пгв-1000

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121826B (fi) * 2006-05-19 2011-04-29 Foster Wheeler Energia Oy Leijupetikattilan keittovesipiiri

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1000828B (de) * 1954-04-30 1957-01-17 Siemens Ag Entsalzungseinrichtung fuer Zwangstrom-Dampferzeuger und Verfahren hierfuer
FR1231916A (fr) * 1958-06-26 1960-10-04 Babcock & Wilcox France Perfectionnements aux chaudières tubulaires et procédé perfectionné de formation d'une paroi tubulaire
DE1426702A1 (de) * 1964-05-27 1969-10-23 Foster Wheeler Corp Zwangsumlauf-Dampferzeuger
US3863606A (en) * 1973-07-25 1975-02-04 Us Environment Vapor generating system utilizing fluidized beds
DE2916345A1 (de) * 1979-04-23 1980-11-13 Joachim Dipl Ing Nitschke Verfahren zur teillaststeuerung von wirbelbettfeuerungen und anordnung zur durchfuehrung des verfahrens
EP0024689A1 (de) * 1979-08-22 1981-03-11 GebràœDer Sulzer Aktiengesellschaft Dampferzeuger mit Zwischenwand zwischen zwei Brennkammern
US4442797A (en) * 1983-01-24 1984-04-17 Electrodyne Research Corporation Gas and particle separation means for a steam generator circulating fluidized bed firing system
EP0054601B1 (de) * 1980-12-23 1984-09-19 GebràœDer Sulzer Aktiengesellschaft Zwanglaufdampferzeugeranlage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1000828B (de) * 1954-04-30 1957-01-17 Siemens Ag Entsalzungseinrichtung fuer Zwangstrom-Dampferzeuger und Verfahren hierfuer
FR1231916A (fr) * 1958-06-26 1960-10-04 Babcock & Wilcox France Perfectionnements aux chaudières tubulaires et procédé perfectionné de formation d'une paroi tubulaire
DE1426702A1 (de) * 1964-05-27 1969-10-23 Foster Wheeler Corp Zwangsumlauf-Dampferzeuger
US3863606A (en) * 1973-07-25 1975-02-04 Us Environment Vapor generating system utilizing fluidized beds
DE2916345A1 (de) * 1979-04-23 1980-11-13 Joachim Dipl Ing Nitschke Verfahren zur teillaststeuerung von wirbelbettfeuerungen und anordnung zur durchfuehrung des verfahrens
EP0024689A1 (de) * 1979-08-22 1981-03-11 GebràœDer Sulzer Aktiengesellschaft Dampferzeuger mit Zwischenwand zwischen zwei Brennkammern
EP0054601B1 (de) * 1980-12-23 1984-09-19 GebràœDer Sulzer Aktiengesellschaft Zwanglaufdampferzeugeranlage
US4442797A (en) * 1983-01-24 1984-04-17 Electrodyne Research Corporation Gas and particle separation means for a steam generator circulating fluidized bed firing system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698659A1 (fr) * 1992-12-02 1994-06-03 Stein Industrie Procédé de récupération de chaleur en particulier pour cycles combinés appareillage pour la mise en Óoeuvre du procédé et installation de récupération de chaleur pour cycle combiné.
EP0600776A1 (fr) * 1992-12-02 1994-06-08 Stein Industrie Procédé de récupération de chaleur en particulier pour cycles combinés et appareillage pour la mise en oeuvre du procédé
US5570578A (en) * 1992-12-02 1996-11-05 Stein Industrie Heat recovery method and device suitable for combined cycles
WO1995007437A1 (en) * 1993-09-07 1995-03-16 Kvaerner Pulping Technologies Ab Steam boiler
US5460127A (en) * 1993-09-07 1995-10-24 Gotaverken Energy Ab Steam boiler
US5755187A (en) * 1993-09-08 1998-05-26 Gotaverken Energy Ab Steam boiler with externally positioned superheating means
RU2487298C1 (ru) * 2011-12-22 2013-07-10 Открытое акционерное общество "Всероссийский научно-исследовательский институт по эксплуатации атомных электростанций" (ОАО "ВНИИАЭС") Струйный аппарат для парогенератора пгв-1000

Also Published As

Publication number Publication date
DE3511877A1 (de) 1986-10-02
FI860703A0 (fi) 1986-02-17
FI860703A (fi) 1986-10-02
DK140286D0 (da) 1986-03-26
DK140286A (da) 1986-10-02
JPS61231301A (ja) 1986-10-15

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