EP3550208B1 - Dispositif de commande de température de vapeur et unité de commande le comprenant - Google Patents

Dispositif de commande de température de vapeur et unité de commande le comprenant Download PDF

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Publication number
EP3550208B1
EP3550208B1 EP17877376.8A EP17877376A EP3550208B1 EP 3550208 B1 EP3550208 B1 EP 3550208B1 EP 17877376 A EP17877376 A EP 17877376A EP 3550208 B1 EP3550208 B1 EP 3550208B1
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EP
European Patent Office
Prior art keywords
temperature
water amount
steam temperature
main steam
value
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.)
Active
Application number
EP17877376.8A
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German (de)
English (en)
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EP3550208A4 (fr
EP3550208A1 (fr
Inventor
Takashi SHIMONASHI
Ko ARIMURA
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.)
Shinko Pantec Co Ltd
Original Assignee
Kobelco Eco Solutions Co Ltd
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Publication date
Application filed by Kobelco Eco Solutions Co Ltd filed Critical Kobelco Eco Solutions Co Ltd
Priority claimed from PCT/JP2017/031691 external-priority patent/WO2018100821A1/fr
Publication of EP3550208A1 publication Critical patent/EP3550208A1/fr
Publication of EP3550208A4 publication Critical patent/EP3550208A4/fr
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Publication of EP3550208B1 publication Critical patent/EP3550208B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • F22G5/123—Water injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G1/00—Steam superheating characterised by heating method
    • F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil

Definitions

  • Patent Literature 1 JP 2016-145652 A
  • inventors of the present invention have focused on a relationship between a main steam temperature and a supply water amount supplied to a desuperheater. Specifically, the inventors have found that the supply water amount, that is, a water amount control value of a spray water supply valve is regulated by a feedback control based on the main steam temperature and hence, tendency of the increase or decrease of a supply water amount and tendency of the increase or decrease of the main steam temperature become equal to each other.
  • the inventors have arrived at an idea that, by adopting a supply water amount (water amount control value) in place of a temperature of an exhaust gas as an index for acquiring a water amount control minimum value, a change width of the main steam temperature after a soot blower operation of a boiler is performed or the like can be reduced.
  • the log number of times 211 indicates the order that main steam temperature (log data) is acquired, and the main steam temperature 212 indicates the content of data, that is, an acquired main steam temperature.
  • a record where the log number of times 211 is "n" (log data on main steam temperature acquired at the n-th time) in the main steam temperature log table 210 means a record added at the latest time.
  • data indicated in the main steam temperature 212 is "500” and hence, a current main steam temperature is assumed as 500°C.
  • the main steam temperature controller 31 acquires data from the sensor at a predetermined cycle (for example, one second).
  • the water amount control value calculation part transmits a preset lowest value to the spray water supply valve as the water amount control minimum value when the main steam temperature is equal to or below a set temperature which is lower than the target temperature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Claims (5)

  1. Un dispositif de commande de température de vapeur (3) pour commander une température de vapeur principale qui est une température de vapeur principale générée à partir d'un surchauffeur (14) d'une chaudière (1), sachant que la chaudière (1) inclut un désurchauffeur (13) qui diminue une température de vapeur en utilisant une quantité d'eau pulvérisée basée sur une valeur de commande de quantité d'eau pour commander un degré d'ouverture d'une soupape d'alimentation en eau pulvérisée (24), la chaudière (1) incluant en outre un surchauffeur (13a) pour chauffer la vapeur déchargée depuis le désurchauffeur (13) par un gaz d'échappement déchargé d'un four, le dispositif de commande de température de vapeur (3) comprenant :
    une partie de calcul de valeur de commande de quantité d'eau (311) qui calcule la valeur de commande de quantité d'eau sur la base de la température de vapeur principale de manière que la température de vapeur principale devienne une température cible, et qui transmet la valeur de commande de quantité d'eau à la soupape d'alimentation en eau pulvérisée (24),
    la partie de calcul de valeur de commande de quantité d'eau (311) est configurée pour transmettre, en tant que valeur de limite inférieure de la valeur de commande de quantité d'eau, une valeur minimale de commande de quantité d'eau à la soupape d'alimentation en eau pulvérisée (24),
    caractérisé en ce que
    la valeur minimale de commande de quantité d'eau est calculée sur la base d'une moyenne mobile d'une valeur détectée d'un détecteur de débit d'eau d'alimentation (25) pendant une période fixe ou d'une moyenne mobile de la valeur de commande de quantité d'eau pendant une période fixe, sachant que le détecteur de débit d'eau d'alimentation (25) détecte une valeur instantanée d'eau pulvérisée fournie au désurchauffeur (13),
    la partie de calcul de valeur de commande de quantité d'eau (311) transmet une valeur, à calculer en multipliant la moyenne mobile ou une valeur basée sur la moyenne mobile par un coefficient de température de vapeur principale, à la soupape d'alimentation en eau pulvérisée (24) comme valeur minimale de commande de quantité d'eau,
    le coefficient de température de vapeur principale indique la valeur la plus basse lorsque la température de vapeur principale est égale ou inférieure à la température réglée, et est déterminé (decided) sur la base de la température de la vapeur principale lorsque la température de la vapeur principale est supérieure à la valeur réglée.
  2. Le dispositif de commande de température de vapeur (3) d'après la revendication 1, sachant que
    la partie de calcul de valeur de commande de quantité d'eau (311) transmet une valeur la plus basse préétablie à la soupape d'alimentation en eau pulvérisée (24) en tant que valeur minimale de commande de quantité d'eau lorsque la température de vapeur principale est égale ou inférieure à une température réglée qui est inférieure à la température cible.
  3. Le dispositif de commande de température de vapeur (3) d'après l'une quelconque des revendications précédentes, sachant que
    la partie de calcul de valeur de commande de quantité d'eau (311) transmet la valeur minimale de commande de quantité d'eau à la soupape d'alimentation en eau pulvérisée (24) en tant que valeur limite inférieure de la valeur de commande de quantité d'eau, lorsque la température de vapeur principale est abaissée en continu pendant une période prédéterminée.
  4. Un dispositif de commande comprenant :
    le dispositif de commande de température de vapeur (3) d'après l'une quelconque des revendications de 1 à 4 ; et
    un dispositif de commande de température cible (4) qui commande une température cible de la température de vapeur principale et transmet la température cible au dispositif de commande de température de vapeur (3), sachant que
    le dispositif de commande de température cible (4) présente une partie de changement de température cible (42) qui, lors de la réception d'un signal d'abaissement de quantité de chaleur qui est un signal indiquant un abaissement d'une quantité de chaleur d'un gaz d'échappement fourni au surchauffeur (14), change une température cible à transmettre au dispositif de commande de température de vapeur (3) en une température cible basse inférieure à une température cible avant que le dispositif de commande de température cible (4) ne reçoive le signal d'abaissement de quantité de chaleur.
  5. Le dispositif de commande d'après la revendication 4, sachant que
    la partie de changement de température cible (42) renvoie une température cible à transmettre au dispositif de commande de température de vapeur (3) à une température cible avant que la partie de changement de température cible (42) ne reçoive le signal d'abaissement de quantité de chaleur lorsque la partie de changement de température cible (42) reçoit un signal de récupération (recovery) de quantité de chaleur qui est un signal indiquant la récupération d'une quantité de chaleur d'un gaz d'échappement fourni au surchauffeur (13a).
EP17877376.8A 2016-11-29 2017-09-04 Dispositif de commande de température de vapeur et unité de commande le comprenant Active EP3550208B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016231213 2016-11-29
JP2017119575A JP6630705B2 (ja) 2016-11-29 2017-06-19 蒸気温度制御装置及びそれを含む制御ユニット
PCT/JP2017/031691 WO2018100821A1 (fr) 2016-11-29 2017-09-04 Dispositif de commande de température de vapeur et unité de commande le comprenant

Publications (3)

Publication Number Publication Date
EP3550208A1 EP3550208A1 (fr) 2019-10-09
EP3550208A4 EP3550208A4 (fr) 2020-09-02
EP3550208B1 true EP3550208B1 (fr) 2023-01-04

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EP17877376.8A Active EP3550208B1 (fr) 2016-11-29 2017-09-04 Dispositif de commande de température de vapeur et unité de commande le comprenant

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EP (1) EP3550208B1 (fr)
JP (1) JP6630705B2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109028025A (zh) * 2018-07-30 2018-12-18 吉林省电力科学研究院有限公司 一种抑制超临界锅炉主蒸汽温度过高的方法
CN115145327A (zh) * 2022-07-25 2022-10-04 中国铝业股份有限公司 一种溶出温度控制方法、装置、设备及存储介质

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07293809A (ja) * 1994-04-22 1995-11-10 Babcock Hitachi Kk 過熱低減器の注水制御方法および装置
EP2244011A1 (fr) * 2009-03-24 2010-10-27 Siemens AG Procédé et dispositif de réglage de la température de la vapeur pour une centrale à vapeur

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Publication number Publication date
EP3550208A4 (fr) 2020-09-02
JP2018091600A (ja) 2018-06-14
JP6630705B2 (ja) 2020-01-15
EP3550208A1 (fr) 2019-10-09

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