GB834012A - Improvements in tubulous vapour generating and vapour heating units and an improved method of regulating superheat and reheat temperatures - Google Patents

Improvements in tubulous vapour generating and vapour heating units and an improved method of regulating superheat and reheat temperatures

Info

Publication number
GB834012A
GB834012A GB18368/56A GB1836856A GB834012A GB 834012 A GB834012 A GB 834012A GB 18368/56 A GB18368/56 A GB 18368/56A GB 1836856 A GB1836856 A GB 1836856A GB 834012 A GB834012 A GB 834012A
Authority
GB
United Kingdom
Prior art keywords
reheater
section
superheater
disposed
chamber
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
GB18368/56A
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 GB834012A publication Critical patent/GB834012A/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
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/341—Vertical radiation boilers with combustion in the lower part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/04—Controlling superheat temperature by regulating flue gas flow, e.g. by proportioning or diverting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Furnace Details (AREA)

Abstract

834,012. Water-tubs steam boilers; superheaters. BABCOCK & WILCOX Ltd. June 14. 1956 [June 15, 1955: Nov. 30, 1955], No. 18368/96. Classes 123(2) and 123(3) In a water-tube boiler comprising cyclone furnaces 24, of the type disclosed in Specification 598,141, discharging gases into a secondary furnace 42 whence they flow through a slag screen 44 and upwardly in a radiation chamber 10 then through a lateral pass 92 and a downpass 74, the end of the lateral pass adjacent the chamber 10 locates a reheater including a section 134 consisting of widely spaced tube platens heated mainly by radiation and a section 138 of narrowly spaced convectionheated platens whilst in the other end of the pass 92 and in the downpass 74 are disposed secondary superheater sections 120, 114, a primary superheater section 106 and an economizer 150, 152. An attemperator 110 is disposed between the superheating stages. To enable the temperature of the gases entering the lateral pass to be adjusted a fan 160 is provided to withdraw flue gas from the bottom of the downpass and deliver it into the chamber 10 through ports 168. The radiant and convection sections of the reheater are so proportioned that the reheated steam temperature remains constant over a wide load range. In operation at full load there is maximum of superheat attemperation and gas recirculation which are both reduced as the load is decreased. Since a large proportion of the reheater is radiantly heated and the superheater is disposed downstream thereof, the tendency of the decreasing gas recirculation to reduce the steam heating effect is much greater in the superheater than in the reheater. The tendency of the reheat temperature to fall more than the superheat temperature with decreasing load is thus offset. In a modification, the reheater includes a radiant section disposed in the top of the radiation chamber and a convection section in the inlet of the lateral pass. Specification 526,825.also is referred to.
GB18368/56A 1955-06-15 1956-06-14 Improvements in tubulous vapour generating and vapour heating units and an improved method of regulating superheat and reheat temperatures Expired GB834012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US834012XA 1955-06-15 1955-06-15

Publications (1)

Publication Number Publication Date
GB834012A true GB834012A (en) 1960-05-04

Family

ID=22178056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18368/56A Expired GB834012A (en) 1955-06-15 1956-06-14 Improvements in tubulous vapour generating and vapour heating units and an improved method of regulating superheat and reheat temperatures

Country Status (1)

Country Link
GB (1) GB834012A (en)

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