EP0065408B1 - Systèmes de commande pour générateurs de vapeur - Google Patents

Systèmes de commande pour générateurs de vapeur Download PDF

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Publication number
EP0065408B1
EP0065408B1 EP82302398A EP82302398A EP0065408B1 EP 0065408 B1 EP0065408 B1 EP 0065408B1 EP 82302398 A EP82302398 A EP 82302398A EP 82302398 A EP82302398 A EP 82302398A EP 0065408 B1 EP0065408 B1 EP 0065408B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
phase
flow
open
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
Application number
EP82302398A
Other languages
German (de)
English (en)
Other versions
EP0065408A2 (fr
EP0065408A3 (en
Inventor
Thomas D. Russell
Robert R. Walker
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.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Publication of EP0065408A2 publication Critical patent/EP0065408A2/fr
Publication of EP0065408A3 publication Critical patent/EP0065408A3/en
Application granted granted Critical
Publication of EP0065408B1 publication Critical patent/EP0065408B1/fr
Expired 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
    • F22B35/00—Control systems for steam boilers
    • F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
    • F22B35/10—Control systems for steam boilers for steam boilers of forced-flow type of once-through type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
    • F22B35/10—Control systems for steam boilers for steam boilers of forced-flow type of once-through type
    • F22B35/105—Control systems for steam boilers for steam boilers of forced-flow type of once-through type operating at sliding pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F01K3/20—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by combustion gases of main boiler
    • F01K3/22—Controlling, e.g. starting, stopping

Definitions

  • the present invention as disclosed hereinbelow is directed towards the provision of a control: system for a boiler which will allow a variable throttle pressure type of operation to be utilised" over a wide load range.
  • a pressure transmitter 62 is connected to both the control coordinator 50 and the control valve 34, and an electrical transmitter 64, a feedwater temperature transmitter 66 and a superheater temperature transmitter 68 are also connected as inputs to the control coordinator 50 which, in turn, regulates the steam flow modifier 56, the firing rate modifier 58 and the feedwater modifier 60 by means of control signals generated therein.
  • variable pressure phase or variable throttle pressure phase of operation the turbine valve 22 is maintained at approximately 70 percent of its fully open position by the turbine valve program 54.
  • steam flow control is regulated by the valve 40 and this valve, in essence, act as a remote throttle valve.
  • the feedwater flow is given the responsibility of controlling steam temperature, whereas the firing rate controls the load, and throttle pressure is permitted to float to whatever value is necessary to satisfy the load requirements.
  • the control coordinator 50 assumes an important function in this phase of operation since it produces error or correction signals to the steam flow modifier 56, the firing rate modifier 58 and the feedwater modifier 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Control Of Turbines (AREA)

Claims (5)

1. Système de commande pour chaudière présentant un trajet d'écoulement s'étendant entre une chambre de combustion (12) et une sortie, le système comprenant:
une première vanne (34) capable de détourner dudit trajet d'écoulement le courant en provenance de la chambre de combustion (12),
une seconde vanne (22) placée à la sortie, une troisième vanne (40) et une quatrième vanne (38) montées en parallèle l'une avec l'autre sur le trajet d'écoulement, et
un moyen (figure 3) de commande des première à quatrième vannes, le moyen de com-, mande étant sensible à certains paramètres du système pour amener les vannes à agir différemment pendant des phases différentes de fonctionnement du système,
caractérisé en ce que lesdites phases de fonctionnement comprennent une phase à faible charge, une phase à pression variable et une phase à pleine pression, et en ce que le moyen de commande assure:
(i) pendant la phase à faible charge, l'ouverture de la première vanne (34), l'ouverture de la seconde vanne (22) jusqu'en une position déterminée, et la fermeture des troisième et quatrième vannes (40, 38),
(ii) pendant la phase à pression variable, la fermeture de la première vanne (34), le maintien de la seconde vanne (22) dans ladite position déterminée, l'ouverture de la troisième vanne (40) de façon que la troisième vanne (40) puisse faire varier l'écoulement de vapeur à partir de la chaudière en réponse à la charge imposée au système, et le maintient de la quatrième vanne (38) à l'état de fermeture, et
(iii) pendant la phase à pleine pression, le maintien de la première vanne (34) à l'état de fermeture et de la troisième vanne (40) à l'état d'ouverture, et l'ouverture de la quatrième vanne (38) pour permettre à la seconde vanne (22) de s'ouvrir davantage à partir de ladite position déterminée pour faire varier l'écoulement de vapeur à partir de la chaudière.
2. Système de commande selon la revendication 1, qui agit pour maintenir la pression d'admission de la chaudière sensiblement constante à la pleine pression nominale pendant la phase de fonctionnement sous pleine pression du système.
3. Système de commande selon la revendication 1 ou la revendication 2, dans lequel le moyen de commande (figure 3) agit pour amener la phase à pression variable du système à commencer quand la demande d'eau d'alimentation du système dépasse les besoins minimaux en eau d'alimentation de la chaudière et pour y mettre fin quand le système a atteint la pleine pression nominale.
4. Système de commande selon la revendication 1, la revendication 2 ou la revendication 3, dans lequel la première vanne (34) est capable de détourner l'écoulement hors du trajet d'écoulement et vers l'intérieur d'un réservoir de vaporisation instantanée (16), dans lequel une cinquième vanne (36) est prévue pour permettre à la vapeur provenant du réservoir de vaporisation instantanée (16) de rejoindre le trajet d'écoulement, et dans lequel le moyen de commande (figure 3) assure l'ouverture de la cinquième vanne (36) pendant la phase sous faible charge et sa fermeture pendant les autres phases.
5. Système de commande selon l'une quelconque des revendications précédentes, dans lequel les troisième et quatrième vannes (40, 38) sont placées entre des surchauffeurs primaire et secondaire (14, 18).
EP82302398A 1981-05-12 1982-05-11 Systèmes de commande pour générateurs de vapeur Expired EP0065408B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26284481A 1981-05-12 1981-05-12
US262844 1981-05-12

Publications (3)

Publication Number Publication Date
EP0065408A2 EP0065408A2 (fr) 1982-11-24
EP0065408A3 EP0065408A3 (en) 1983-11-16
EP0065408B1 true EP0065408B1 (fr) 1986-04-23

Family

ID=22999306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302398A Expired EP0065408B1 (fr) 1981-05-12 1982-05-11 Systèmes de commande pour générateurs de vapeur

Country Status (8)

Country Link
EP (1) EP0065408B1 (fr)
JP (1) JPS57198902A (fr)
KR (1) KR870001505B1 (fr)
AU (1) AU556280B2 (fr)
CA (1) CA1211324A (fr)
DE (1) DE3270729D1 (fr)
ES (1) ES8400580A1 (fr)
MX (1) MX152206A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1270485A1 (ru) * 1983-12-06 1986-11-15 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Атомного Энергетического Машиностроения Котел
KR102210866B1 (ko) * 2019-09-18 2021-02-04 한국에너지기술연구원 플래쉬탱크를 이용한 발전사이클시스템 및 그 제어방법
CN113432105A (zh) * 2021-07-14 2021-09-24 鞍山阿尔肯科技发展有限公司 一种物联网构架下燃气锅炉热能管理系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286466A (en) * 1964-04-24 1966-11-22 Foster Wheeler Corp Once-through vapor generator variable pressure start-up system
US3572036A (en) * 1968-10-21 1971-03-23 Foster Wheeler Corp Vapor generator start-up system
US4241585A (en) * 1978-04-14 1980-12-30 Foster Wheeler Energy Corporation Method of operating a vapor generating system having integral separators and a constant pressure furnace circuitry

Also Published As

Publication number Publication date
EP0065408A2 (fr) 1982-11-24
KR830010338A (ko) 1983-12-30
EP0065408A3 (en) 1983-11-16
CA1211324A (fr) 1986-09-16
AU8357282A (en) 1982-11-18
ES512051A0 (es) 1983-11-01
ES8400580A1 (es) 1983-11-01
KR870001505B1 (ko) 1987-08-19
MX152206A (es) 1985-06-07
AU556280B2 (en) 1986-10-30
JPS57198902A (en) 1982-12-06
DE3270729D1 (en) 1986-05-28
JPS6252122B2 (fr) 1987-11-04

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