EP0233998A1 - Dispositif de réglage à une valeur donnée de la température des fumées - Google Patents

Dispositif de réglage à une valeur donnée de la température des fumées Download PDF

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Publication number
EP0233998A1
EP0233998A1 EP86115200A EP86115200A EP0233998A1 EP 0233998 A1 EP0233998 A1 EP 0233998A1 EP 86115200 A EP86115200 A EP 86115200A EP 86115200 A EP86115200 A EP 86115200A EP 0233998 A1 EP0233998 A1 EP 0233998A1
Authority
EP
European Patent Office
Prior art keywords
flue gas
partition
flue
steam generator
duct
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
EP86115200A
Other languages
German (de)
English (en)
Other versions
EP0233998B1 (fr
Inventor
Manfred Klein
Wilhelm Lindermann
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.)
Deutsche Babcock Werke AG
Original Assignee
Deutsche Babcock Werke 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=6295116&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0233998(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Deutsche Babcock Werke AG filed Critical Deutsche Babcock Werke AG
Priority to AT86115200T priority Critical patent/ATE51063T1/de
Publication of EP0233998A1 publication Critical patent/EP0233998A1/fr
Application granted granted Critical
Publication of EP0233998B1 publication Critical patent/EP0233998B1/fr
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
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/008—Adaptations for flue gas purification in steam generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/001—Controlling by flue gas dampers
    • 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
    • F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles

Definitions

  • the invention relates to a device for setting a predetermined outlet temperature of the flue gas leaving a steam generator which remains constant within a range, with the features of the preamble of patent claim 1.
  • the steam generators which are fired with fossil fuels, are operated in such a way that the flue gas temperature behind the last heating surface, which is an economizer, decreases with decreasing output of the steam generator.
  • the flue gas temperature In the event that a denitrification system for reducing the NO x content in the flue gas is provided in the flue gas system between the economizer and an air preheater heated by the flue gas, the flue gas temperature must be adjusted to the working range of this system. This means that the flue gas temperature must not fall below a certain level before the flue gas enters the denitrification plant.
  • the invention has for its object to provide a device through which the outlet temperature of the flue gas can be kept above a permissible value regardless of the load of the steam generator by simple means.
  • the last heating surface is completely or only partially exposed to flue gas. This reduces the heat dissipation of the flue gas and raises the outlet temperature while setting it to the desired value.
  • the partition prevents temperature imbalances in the flue gas by individually closing or opening the flaps when the load drops or rises.
  • the load range that can be influenced is expanded if several partition walls are provided. Since the partition or partitions are located transversely to the heating surfaces, water and steam-side temperature imbalances and uneven heat absorption within the heating surface are avoided. Finally, due to the vertical arrangement, the partition is insensitive to contamination and can therefore also be used in coal-fired steam generators.
  • the steam generator shown in Fig. 1 is designed as a draw-in boiler and contains an only indicated combustion chamber 1, which is followed by a flue gas duct 2.
  • Combustion chamber 1 and flue gas flue 2 are formed by gas-tight welded tube walls.
  • At the outlet end of the flue gas duct 2 there is a flue gas duct 3 which is connected to an air preheater 5 via a flue gas line 4.
  • the flue gas line 4 is led behind the air preheater 5 to a chimney, not shown.
  • heating surfaces 6, 7, 8 are arranged, which are connected as superheaters and as economizers. As is shown in more detail for the last heating surface 8 switched as an economizer in the flow direction of the flue gas, the heating surfaces 6, 7, 8 each consist of one or more tube bundles, the tubes of which are guided in several turns across the flue gas duct 2.
  • a denitrification plant 9 is arranged in the flue gas line 4 before entering the air preheater 5, in which the nitrogen oxides contained in the flue gas are reduced by adding ammonia and with the aid of catalysts.
  • the denitrification plant can only work in a certain temperature range of around 320 to 380 degrees Celsius. It must therefore be ensured that this temperature range is maintained irrespective of the respective load range of the steam generator.
  • each partition 10 is arranged vertically in the area of the flue gas outlet in the flue gas duct 2.
  • Each partition 10 extends transversely to the heating surfaces 6, 7, 8 and extends to the ceiling of the flue gas duct 2.
  • the last heating surface 8 can be formed from smooth tubes or from finned tubes. If smooth pipes are used, each partition wall 10 penetrates the last heating surface 8. In this way, a cross-flow through the heating surface 8 is avoided.
  • the partition 10 can only partially penetrate the heating surface 8 or extend close to the penultimate heating surface 7. If the last heating surface 8 is made up of finned tubes which, by themselves, produce a vertical flow, the partition 10 begins immediately behind the last heating surface 8.
  • the partition 10 is provided behind the last heating surface 8 with rotatable flaps 11.
  • the outlet-side part of the flue gas flue 2 is thus divided into sections which are flowed through or not flowed through depending on the position of the flaps 11.
  • the section adjacent to the flue gas duct 3 and separated by the corresponding partition 10 has such a cross section that the flue gas flows in it at minimum load at approximately the same flow rate as at full load over the entire cross section of the flue gas duct 2.
  • a plurality of partitions 10 When the load is reduced, a plurality of partitions 10 first closes the partition which is furthest away from the flue gas duct 3, specifically with the flap 11, which is also the most distant from the heating surface 8. Thus, the separated section is only partially or no longer flowed through by the flue gas, so that the last heating surface 8 is partially removed from the flue gas.
  • the flaps 11 are closed or opened when the load changes. Individual flaps 11 can also be closed, starting with the flap 11 that is furthest from the last heating surface 8. This type of flap actuation can also be used in the arrangement of a plurality of partition walls 10. In the open state, the flaps represent 11 flow control arms.
  • the steam generator shown in FIG. 2 is designed as a multi-pass boiler, in which the last flue gas train 2 is connected to the combustion chamber 1 or another flue gas train via a transverse train 12.
  • the last flue gas flue 2 flows through from top to bottom and ends in a funnel shape.
  • Two funnels 13 are formed, the partition wall 10 running into the apex between the funnels 13. If several partition walls 10 are provided, a further funnel can be arranged for each additional partition wall. It is also possible to have the partition wall 10 extend into the funnel 13.
  • the rotatable flaps 11 are designed according to FIG. 1 as multi-leaf flaps. These louvre flaps can also be replaced by a swing wing flap.
  • the partition 10 of the boiler shown in FIG. 2 is provided with such a swivel wing flap. Instead of this swivel wing flap, louvre flaps can also be used here.

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)
  • Chimneys And Flues (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Control Of Combustion (AREA)
  • Treating Waste Gases (AREA)
EP86115200A 1986-02-28 1986-11-03 Dispositif de réglage à une valeur donnée de la température des fumées Expired - Lifetime EP0233998B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115200T ATE51063T1 (de) 1986-02-28 1986-11-03 Vorrichtung zur einstellung vorgegebener rauchgastemperatur.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606463 DE3606463A1 (de) 1986-02-28 1986-02-28 Vorrichtung zur einstellung einer vorgegebenen rauchgastemperatur
DE3606463 1986-02-28

Publications (2)

Publication Number Publication Date
EP0233998A1 true EP0233998A1 (fr) 1987-09-02
EP0233998B1 EP0233998B1 (fr) 1990-03-14

Family

ID=6295116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115200A Expired - Lifetime EP0233998B1 (fr) 1986-02-28 1986-11-03 Dispositif de réglage à une valeur donnée de la température des fumées

Country Status (4)

Country Link
EP (1) EP0233998B1 (fr)
JP (1) JPH0781696B2 (fr)
AT (1) ATE51063T1 (fr)
DE (2) DE3606463A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595009A1 (fr) * 1992-09-30 1994-05-04 Siemens Aktiengesellschaft Procédé de fonctionnement d'une centrale et centrale fonctionnant suivant ce procédé
FR2699264A1 (fr) * 1992-12-15 1994-06-17 Babcock Entreprise Echangeur de chaleur muni d'un système anti-érosion.
CN103017137A (zh) * 2012-12-27 2013-04-03 青岛胜利锅炉有限公司 锅炉防低温腐蚀结构
CH706152A1 (de) * 2012-02-29 2013-08-30 Alstom Technology Ltd Gasturbinenanlage mit einer Abwärmekesselanordnung mit Abgasrückführung.
CN109404948A (zh) * 2018-10-31 2019-03-01 上海新业锅炉高科技有限公司 一种改变受热面的烟气流向装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402671B (de) * 1993-06-17 1997-07-25 Vaillant Gmbh Heizeinrichtung heizeinrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB756067A (en) * 1953-12-02 1956-08-29 Foster Wheeler Ltd Improvements in and relating to vapour generators
FR1317026A (fr) * 1962-03-08 1963-02-01 Steinmueller Gmbh L & C Procédé et dispositif pour améliorer l'économie thermique des machines à vapeur
DE1162383B (de) * 1953-05-02 1964-02-06 Steinmueller Gmbh L & C Durch stark aggressive Abgase beheizter Dampferzeuger, dessen Verdampferheizflaeche durch entsprechend hoch vorgesehenen Betriebsdruck vor Taupunktskorrosionen geschuetzt ist
GB1544169A (en) * 1976-07-27 1979-04-11 Hitachi Shipbuilding Eng Co Boiler apparatus containing a denitrator
GB1577202A (en) * 1977-04-01 1980-10-22 Smith F Heat exchange tube assemblies and economizers incorporating them
GB2082084A (en) * 1980-08-20 1982-03-03 Westinghouse Electric Corp Apparatus for recovering heat energy and removing nox in combined cycle plants

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE558731C (de) * 1928-08-08 1932-09-10 Fried Krupp Germaniawerft Akt Luftvorwaermer fuer stufenweise Luftvorwaermung, insbesondere fuer hohe Vorwaermung der Zusatzluft
DE610243C (de) * 1932-06-02 1935-03-08 Elektrowerke A G Korrosionssichere Anordnung bei Kreuzstromwaermeaustauschern
JPS52153250A (en) * 1976-06-15 1977-12-20 Mitsubishi Heavy Ind Ltd Combustion device
JPS57196013A (en) * 1981-05-27 1982-12-01 Babcock Hitachi Kk Denitrating device for waste heat recovery boiler
DE3332663C2 (de) * 1983-09-10 1987-02-19 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur Optimierung der Reduktion von NO↓x↓ in Rauchgasen aus mit fossilen Brennstoffen befeuerten Feuerungseinrichtungen
JPS6219604A (ja) * 1985-07-19 1987-01-28 川崎重工業株式会社 ガス温度制御装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1162383B (de) * 1953-05-02 1964-02-06 Steinmueller Gmbh L & C Durch stark aggressive Abgase beheizter Dampferzeuger, dessen Verdampferheizflaeche durch entsprechend hoch vorgesehenen Betriebsdruck vor Taupunktskorrosionen geschuetzt ist
GB756067A (en) * 1953-12-02 1956-08-29 Foster Wheeler Ltd Improvements in and relating to vapour generators
FR1317026A (fr) * 1962-03-08 1963-02-01 Steinmueller Gmbh L & C Procédé et dispositif pour améliorer l'économie thermique des machines à vapeur
GB1544169A (en) * 1976-07-27 1979-04-11 Hitachi Shipbuilding Eng Co Boiler apparatus containing a denitrator
GB1577202A (en) * 1977-04-01 1980-10-22 Smith F Heat exchange tube assemblies and economizers incorporating them
GB2082084A (en) * 1980-08-20 1982-03-03 Westinghouse Electric Corp Apparatus for recovering heat energy and removing nox in combined cycle plants

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595009A1 (fr) * 1992-09-30 1994-05-04 Siemens Aktiengesellschaft Procédé de fonctionnement d'une centrale et centrale fonctionnant suivant ce procédé
FR2699264A1 (fr) * 1992-12-15 1994-06-17 Babcock Entreprise Echangeur de chaleur muni d'un système anti-érosion.
CH706152A1 (de) * 2012-02-29 2013-08-30 Alstom Technology Ltd Gasturbinenanlage mit einer Abwärmekesselanordnung mit Abgasrückführung.
WO2013127924A3 (fr) * 2012-02-29 2014-12-11 Alstom Technology Ltd Installation de turbine à gaz avec recirculation des gaz d'échappement
CN104302892A (zh) * 2012-02-29 2015-01-21 阿尔斯通技术有限公司 具有排气再循环的燃气涡轮机组
CN104302892B (zh) * 2012-02-29 2016-08-24 通用电器技术有限公司 具有排气再循环的燃气涡轮机组
CN103017137A (zh) * 2012-12-27 2013-04-03 青岛胜利锅炉有限公司 锅炉防低温腐蚀结构
CN109404948A (zh) * 2018-10-31 2019-03-01 上海新业锅炉高科技有限公司 一种改变受热面的烟气流向装置

Also Published As

Publication number Publication date
JPS62206316A (ja) 1987-09-10
DE3606463A1 (de) 1987-09-03
JPH0781696B2 (ja) 1995-09-06
DE3669579D1 (de) 1990-04-19
EP0233998B1 (fr) 1990-03-14
ATE51063T1 (de) 1990-03-15

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