JPS6470603A - Method of controlling once-through boiler - Google Patents

Method of controlling once-through boiler

Info

Publication number
JPS6470603A
JPS6470603A JP22719887A JP22719887A JPS6470603A JP S6470603 A JPS6470603 A JP S6470603A JP 22719887 A JP22719887 A JP 22719887A JP 22719887 A JP22719887 A JP 22719887A JP S6470603 A JPS6470603 A JP S6470603A
Authority
JP
Japan
Prior art keywords
steam
evaporation pipe
enthalpy
outlet
boiler
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.)
Pending
Application number
JP22719887A
Other languages
Japanese (ja)
Inventor
Hiroyuki Takamatsu
Kenichi Ide
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.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Kasei Corp
Mitsubishi Chemical Industries 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 Mitsubishi Kasei Corp, Mitsubishi Chemical Industries Ltd filed Critical Mitsubishi Kasei Corp
Priority to JP22719887A priority Critical patent/JPS6470603A/en
Publication of JPS6470603A publication Critical patent/JPS6470603A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

PURPOSE: To enhance economy of once-through boiler operation by calculating an optimal humidity for preventing superheating of an evaporation pipe during normal operation of an once-through boiler and then controlling water supply and drain water from a steam separator using the optimal humidity as a control target value. CONSTITUTION: A water supply regulation valve 5 and a drain water regulation valve 10 are regulated during normal operation to decrease the humidity of inlet steam of a steam separator 9 gradually such that at least one evaporation pipe 2 is brought into superheated state temporarily before returning back to normal operation. Based on the temperature and pressure of outlet steam having highest temperature (hereinafter referred to lowest moisture evaporation pipe) among superheated evaporation pipes 2, enthalpy of outlet steam of the lowermost moisture evaporation pipe 2 is determined. Subsequently, relation between the enthalpy of outlet steam of the lowermost moisture evaporation pipe 2 and the enthalpy of fluid at the inlet and outlet of a heating furnace 1 is determined and moisture check operation is conducted.
JP22719887A 1987-09-10 1987-09-10 Method of controlling once-through boiler Pending JPS6470603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22719887A JPS6470603A (en) 1987-09-10 1987-09-10 Method of controlling once-through boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22719887A JPS6470603A (en) 1987-09-10 1987-09-10 Method of controlling once-through boiler

Publications (1)

Publication Number Publication Date
JPS6470603A true JPS6470603A (en) 1989-03-16

Family

ID=16857031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22719887A Pending JPS6470603A (en) 1987-09-10 1987-09-10 Method of controlling once-through boiler

Country Status (1)

Country Link
JP (1) JPS6470603A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021256245A1 (en) * 2020-06-15 2021-12-23 三菱パワー株式会社 Operation control device of once-through boiler, operation control method, and once-through boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021256245A1 (en) * 2020-06-15 2021-12-23 三菱パワー株式会社 Operation control device of once-through boiler, operation control method, and once-through boiler
JP2021196116A (en) * 2020-06-15 2021-12-27 三菱パワー株式会社 Operation controller for once-through boiler, operation control method and once-through boiler

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