WO1993004318A1 - Generateur de vapeur a recuperation thermique, chauffe au gaz - Google Patents

Generateur de vapeur a recuperation thermique, chauffe au gaz Download PDF

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Publication number
WO1993004318A1
WO1993004318A1 PCT/DE1992/000554 DE9200554W WO9304318A1 WO 1993004318 A1 WO1993004318 A1 WO 1993004318A1 DE 9200554 W DE9200554 W DE 9200554W WO 9304318 A1 WO9304318 A1 WO 9304318A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
gas
flow
pressure
heat recovery
Prior art date
Application number
PCT/DE1992/000554
Other languages
German (de)
English (en)
Inventor
Hermann Brückner
Joachim Franke
Eberhard Wittchow
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1993004318A1 publication Critical patent/WO1993004318A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines

Definitions

  • the invention relates to gas-heated heat recovery steam generators with one or more evaporators of different pressure stages, at least one evaporator being designed as a continuous evaporator and flowing through on the water side in direct current to the heating gas stream.
  • gas-heated Abhitze ⁇ steam generator is known from PCT / DE 89/00081.
  • the invention is therefore based on the object of creating a gas-heated heat recovery steam generator whose water pipes connected in parallel in parallel in a predominantly convectively heated evaporator are flowed through by approximately equal amounts of water, so that approximately equally large heat flows are transmitted in the individual pipes.
  • a once-through evaporator consists of two each on the water / steam side consists of parts flowing through in direct current with the gas flow and that the heat flows transferred in these parts are in a ratio of 7: 3 to 10: 1 and that the part first flowed through on the water side in the gas flow is downstream from the second part on the gas side.
  • the outlet temperature of the water vapor generated when leaving the second part of the once-through evaporator is clearly above the boiling temperature and the heat flow distribution to the two parts of the once-through evaporator remains between 7: 3 and 10: 1 even with stationary loads deviating from the nominal load.
  • Advantageous refinements of the invention consist in that between the two parts of the continuous evaporator there is no collector through which the entire water / steam flow flows, but rather coupling lines connect the tubes of the first and second parts directly to one another.
  • Gas-heated heat recovery steam generators constructed according to the invention are very advantageous because there are practically no increased pressure losses, for example as a result of the use of throttles, to ensure a uniform flow distribution on the individual tubes and there is no risk of pipe tears, for example due to clogging of throttles given is.
  • FIG. 1 shows a part of an exhaust gas duct designed as a heat recovery steam generator
  • FIG. 2 shows a section of a parallel tube of a once-through evaporator on a larger scale. Corresponding components are provided with the same reference symbols in both figures.
  • Exhaust gas duct 1 In an exhaust gas duct 1 according to FIG. 1, heat exchangers, which mostly consist of heating surfaces formed by pipes, of a heat recovery steam generator are installed. Exhaust gas duct 1 has hot exhaust gas 2 flowing through it from bottom to top.
  • the exhaust gas 2 used is, for example, a still hot working gas which is expanded in a gas turbine and flows to a chimney, or is heated in a closed circuit in a high-temperature reactor.
  • the temperature of the exhaust gas 2 is, for example, above 550 ° C. at the lower end of the heat recovery steam generator and below 100 ° C. at the upper end, for example.
  • the high-pressure economizer HD ECO 2 and the medium-pressure superheater MDÜ are located side by side in the exhaust gas duct 1 in the same gas-side temperature range.
  • the medium-pressure evaporator MD VD and the medium-pressure superheater MDÜ can also be omitted, the other heat exchangers are then correspondingly larger.
  • the heat exchangers are flowed through in the direction of small arrows 3 drawn in them by water or steam from a water-steam cycle. Accordingly, the direction of flow of the water-steam circuit in the condensate preheater is KVW, in the high pressure economizer HD ECO 1 and 2, in the low pressure superheater NDÜ, in the medium pressure superheater MDÜ, in the intermediate pressure superheater ZU and in the high pressure superheater HDÜ the flow direction of the exhaust gas 2.
  • the individual heat exchangers are connected to one another in terms of flow by means of connecting lines arranged partially outside the exhaust gas duct 1.
  • the connecting line 4 lies between the low-pressure evaporator ND VD and the low-pressure superheater NDÜ, between the high-pressure economizer HD ECO 1 and the high-pressure economizer HD ECO 2 the connecting line 5, between the high-pressure economizer HD ECO 1 and the medium pressure evaporator MD VD the connecting line 6, between the medium pressure evaporator MD VD and the medium pressure superheater MDÜ the connecting line 7, between the medium pressure superheater MDÜ and the intermediate pressure superheater ZDÜ the connecting line 8, between the high pressure -Econo ⁇ mizer HD ECO 2 and the high-pressure evaporator HD VD 1 the connecting line 9, between the high-pressure evaporator HD VD 1 and the high-pressure evaporator HD VD 2 the coupling lines 10 and between the high-pressure evaporator HD VD 2 and the high pressure
  • a two-part continuous evaporator has the advantage that the outlet on the water vapor side is in an area with a relatively high exhaust gas temperature, so that the steam generated can already be overheated before the outlet.
  • the evaporation end point is not fixed, but can move within a heating surface section.
  • FIG. 2 shows an inlet header 14 at the inlet of the high-pressure evaporator HD VD 1 and an outlet header 15 at the outlet of the high-pressure evaporator HD VD 2.
  • Possible collectors to be provided at the entrances and exits of the individual heat exchangers are shown in FIG 1 not shown.
  • the division of the high-pressure evaporator into the parts HDVD 1 and HDVD 2 according to the invention is not limited to use in waste heat steam generators, but can also be used in any other steam generators with appropriate pressure, temperature and quantity ratios.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

Ce type de générateur de vapeur à récupération thermique comprend un évaporateur ou plusieurs évaporateurs ayant des étages de pression différents. Il y a au moins un évaporateur à écoulement continu, de préférence dans un étage de haute pression (HD VD, HDÜ). Dans l'évaporateur à écoulement continu (HD VD), l'écoulement de l'eau s'effectue dans le même sens que le flux de gaz (2) destiné à la chauffe. Selon l'invention, l'évaporateur à écoulement continu se compose de deux parties (HD VD 1 et HD VD 2) permettant chacune un écoulement dans le même sens que le flux de gaz. Les deux flux de chaleur circulant dans ces parties (HD VD 1 et HD VD 2) sont liés l'un à l'autre dans un rapport allant de 7:3 à 10:1. La partie (HD VD 1) traversée en premier par l'eau se trouve en aval par rapport à la deuxième partie (HD VD 2) dans le flux de gaz (2). Les générateurs de vapeur de ce type présentent une répartition très régulière de l'écoulement dans les tuyaux parallèles de l'évaporateur et sont avant tout destinés à l'utilisation dans le flux du gaz d'échappement (2) de turbines à gaz ou dans l'écoulement du fluide caloporteur des réacteurs nucléaires à haute température.
PCT/DE1992/000554 1991-08-12 1992-07-03 Generateur de vapeur a recuperation thermique, chauffe au gaz WO1993004318A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4126631.5 1991-08-12
DE19914126631 DE4126631C2 (de) 1991-08-12 1991-08-12 Gasbeheizter Abhitzedampferzeuger

Publications (1)

Publication Number Publication Date
WO1993004318A1 true WO1993004318A1 (fr) 1993-03-04

Family

ID=6438147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000554 WO1993004318A1 (fr) 1991-08-12 1992-07-03 Generateur de vapeur a recuperation thermique, chauffe au gaz

Country Status (2)

Country Link
DE (1) DE4126631C2 (fr)
WO (1) WO1993004318A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19544225A1 (de) * 1995-11-28 1997-06-05 Asea Brown Boveri Reinigung des Wasser-Dampfkreislaufs in einem Zwangsdurchlauferzeuger
DE19544224B4 (de) * 1995-11-28 2004-10-14 Alstom Chemische Fahrweise eines Wasser/Dampf-Kreislaufes
DE19544226B4 (de) * 1995-11-28 2007-03-29 Alstom Kombianlage mit Mehrdruckkessel
US6092490A (en) * 1998-04-03 2000-07-25 Combustion Engineering, Inc. Heat recovery steam generator
DE19834741A1 (de) * 1998-08-01 2000-02-03 Asea Brown Boveri Verfahren und Vorrichtung zum Betreiben eines Dampferzeugers bei verminderter Kühlung seines Zwischenüberhitzers
EP1512905A1 (fr) * 2003-09-03 2005-03-09 Siemens Aktiengesellschaft Générateur de vapeur à passage unique et méthode pour faire fonctionner ledit générateur de vapeur à passage unique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2107449A5 (fr) * 1970-09-08 1972-05-05 Sulzer Ag
DE2337526A1 (de) * 1973-05-18 1974-12-12 Herpen Co Kg La Mont Kessel Mit abgasen und/oder feuerungsgasen beheizbarer zwangumlaufdampferzeuger
DE2621340A1 (de) * 1976-05-05 1977-11-17 Sulzer Ag Abhitzedampferzeuger
EP0425717B1 (fr) * 1989-10-30 1995-05-24 Siemens Aktiengesellschaft Générateur de vapeur à passage unique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804605A1 (de) * 1988-02-12 1989-08-24 Siemens Ag Verfahren und anlage zur abhitzedampferzeugung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2107449A5 (fr) * 1970-09-08 1972-05-05 Sulzer Ag
DE2337526A1 (de) * 1973-05-18 1974-12-12 Herpen Co Kg La Mont Kessel Mit abgasen und/oder feuerungsgasen beheizbarer zwangumlaufdampferzeuger
DE2621340A1 (de) * 1976-05-05 1977-11-17 Sulzer Ag Abhitzedampferzeuger
EP0425717B1 (fr) * 1989-10-30 1995-05-24 Siemens Aktiengesellschaft Générateur de vapeur à passage unique

Also Published As

Publication number Publication date
DE4126631A1 (de) 1993-02-18
DE4126631C2 (de) 1995-09-14

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