GB764942A - Improvements in forced flow tubulous boilers with radiantly heated vapour generatingmeans - Google Patents

Improvements in forced flow tubulous boilers with radiantly heated vapour generatingmeans

Info

Publication number
GB764942A
GB764942A GB4895/55A GB489555A GB764942A GB 764942 A GB764942 A GB 764942A GB 4895/55 A GB4895/55 A GB 4895/55A GB 489555 A GB489555 A GB 489555A GB 764942 A GB764942 A GB 764942A
Authority
GB
United Kingdom
Prior art keywords
downflow
limbs
upflow
forced flow
steam
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
GB4895/55A
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
Publication of GB764942A publication Critical patent/GB764942A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/12—Forms of water tubes, e.g. of varying cross-section

Landscapes

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

Abstract

764,942. Forced flow steam boilers. BABCOCK & WILCOX, Ltd. Feb. 18, 1955 [Feb. 18, 1954], No. 4895/55. Class 123(2) In a forced flow steam boiler having radiantly heated steam generating tubes including at least two series-connected lengths through which the working medium flows respectively upwardly and downwardly, the upflow length is of larger internal diameter than the downflow length so that the flow velocity in the latter, where the steam bubbles tend to rise, is increased, the diameters of both lengths being such that the respective flow velocities are sufficient to prevent the formation of large steam bubbles which adhere to the tube wall and cause local overheating of the tube metal. In an example, the boiler furnace is lined with tubes having upflow and downflow limbs of bore diameters of 30-38 mm. and 25-32 mm. respectively. The end portions of the upflow limbs are swaged to the diameter of the downflow limbs, formed into return bends and welded to the ends of the downflow limbs. The upflow velocity in this tube system is about 10 metres per second whilst the downflow velocity is about 14.4 metres per second.
GB4895/55A 1954-02-18 1955-02-18 Improvements in forced flow tubulous boilers with radiantly heated vapour generatingmeans Expired GB764942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE764942X 1954-02-18

Publications (1)

Publication Number Publication Date
GB764942A true GB764942A (en) 1957-01-02

Family

ID=6672974

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4895/55A Expired GB764942A (en) 1954-02-18 1955-02-18 Improvements in forced flow tubulous boilers with radiantly heated vapour generatingmeans

Country Status (1)

Country Link
GB (1) GB764942A (en)

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