EP3550208B1 - Steam temperature control device and control unit including same - Google Patents

Steam temperature control device and control unit including same 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
Authority
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
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3550208A4 (en
EP3550208A1 (en
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
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 Kobelco Eco Solutions Co Ltd filed Critical Kobelco Eco Solutions Co Ltd
Priority claimed from PCT/JP2017/031691 external-priority patent/WO2018100821A1/ja
Publication of EP3550208A1 publication Critical patent/EP3550208A1/en
Publication of EP3550208A4 publication Critical patent/EP3550208A4/en
Application granted granted Critical
Publication of EP3550208B1 publication Critical patent/EP3550208B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
EP17877376.8A 2016-11-29 2017-09-04 Steam temperature control device and control unit including same Active EP3550208B1 (en)

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 (ja) 2016-11-29 2017-09-04 蒸気温度制御装置及びそれを含む制御ユニット

Publications (3)

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

Family

ID=62565946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17877376.8A Active EP3550208B1 (en) 2016-11-29 2017-09-04 Steam temperature control device and control unit including same

Country Status (2)

Country Link
EP (1) EP3550208B1 (ja)
JP (1) JP6630705B2 (ja)

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 (de) * 2009-03-24 2010-10-27 Siemens AG Verfahren und Vorrichtung zum Regeln der Temperatur von Dampf für eine Dampfkraftanlage

Also Published As

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

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