GB911870A - Improvements in independently fired tubulous vapour heaters - Google Patents

Improvements in independently fired tubulous vapour heaters

Info

Publication number
GB911870A
GB911870A GB2626360A GB2626360A GB911870A GB 911870 A GB911870 A GB 911870A GB 2626360 A GB2626360 A GB 2626360A GB 2626360 A GB2626360 A GB 2626360A GB 911870 A GB911870 A GB 911870A
Authority
GB
United Kingdom
Prior art keywords
furnace
superheater
steam
header
temperature
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
GB2626360A
Inventor
David Howard Scott
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 International Ltd
Original Assignee
Babcock and Wilcox 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 Babcock and Wilcox Ltd filed Critical Babcock and Wilcox Ltd
Priority to GB2626360A priority Critical patent/GB911870A/en
Publication of GB911870A publication Critical patent/GB911870A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/04—Heat supply by installation of two or more combustion apparatus, e.g. of separate combustion apparatus for the boiler and the superheater respectively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Air Supply (AREA)

Abstract

911,870. Steam superheaters. BABCOCK & WILCOX Ltd. July 26, 1961 [July 28, 1960], No. 26263/60. Class 123 (3). In an independently-fired superheater which receives steam from an intermittent source such as the waste heat boiler of a Bessemer converter, overheating of tubes lining the superheater furnace is prevented by two control means, the first maintaining a constant final steam temperature whilst the second is responsive to steam temperature at the outlet of the furnace tubes and exerts an overriding control to limit this temperature to a safe value when the steam supply falls. As shown, the superheater has a tube-lined furnace 2 fired by blast furnace or coke-oven gas burners 26, the gases flowing from the furnace through a lateral outlet into a horizontal pass 20 locating a final convection superheater 60. The gases leave the pass 20 through an opening in the floor thereof and flow upwardly in a pass containing a primary convection superheater 34 to discharge through a duct 64 to an air heater 66 whence they pass through an induced draught fan 70 to a stack 72. Steam flows from an inlet header 28 through the superheater 34 and then the furnace lining tubes to a header 54 whence it passes through the final superheater 60 to the outlet header 62. A temperaturesensitive element in the header 62 regulates the supply of gas to the burners 26 by adjusting the setting of a damper 86, a combustion-air control maintaining a suitable ratio of air flow to gas flow, to maintain the final steam temperature constant. A second temperaturesensitive element in the header 54 regulates the supply of excess air to the burners by adjusting the setting of a damper 80 to ensure by limiting the temperature of the steam leaving the furnace tubes that a safe value of the temperature of the tube metal is maintained at all times. In a modification, the second control means regulates the rate at which cooled flue gases are recirculated to the furnace chamber.
GB2626360A 1960-07-28 1960-07-28 Improvements in independently fired tubulous vapour heaters Expired GB911870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2626360A GB911870A (en) 1960-07-28 1960-07-28 Improvements in independently fired tubulous vapour heaters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2626360A GB911870A (en) 1960-07-28 1960-07-28 Improvements in independently fired tubulous vapour heaters

Publications (1)

Publication Number Publication Date
GB911870A true GB911870A (en) 1962-11-28

Family

ID=10240898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2626360A Expired GB911870A (en) 1960-07-28 1960-07-28 Improvements in independently fired tubulous vapour heaters

Country Status (1)

Country Link
GB (1) GB911870A (en)

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