GB807282A - Improvements in tubulous vapour generating and vapour heating units - Google Patents
Improvements in tubulous vapour generating and vapour heating unitsInfo
- Publication number
- GB807282A GB807282A GB1423156A GB1423156A GB807282A GB 807282 A GB807282 A GB 807282A GB 1423156 A GB1423156 A GB 1423156A GB 1423156 A GB1423156 A GB 1423156A GB 807282 A GB807282 A GB 807282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- chambers
- passes
- banks
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/06—Controlling superheat temperature by recirculating flue gases
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
807,282. Water-tube steam boilers; regulating steam temperature. BABCOCK & WILCOX Ltd. May 7, 1957 [May 8, 1956], No. 14231/56. Classes 123(2) and 123(3) A high capacity steam generator comprises an upright chamber 1 with generating tube lined radiation chambers 2, 3 located at its lower end disposed side by side and separated by a tube wall 4, the chambers leading upwardly to respective tube lined parallel gas passes 5, 6. At opposite sides of the unit are disposed respective rows of cyclone furnaces 7, 8 suitably of the form described in Specification 552,747 [Group XII], and lined with wall tubes of arcuate form as described in Specification 779,857 [Group XII]. The furnaces 7, 8 discharge through throats 29, 30 suitably formed of tubes bent as described in Specification 598,142 [Group XII], into respective secondary furnace chambers 9, 10 whence the hot gases flow through slag screens 33, 34 into the chambers 2, 3. The tubes lining the furnaces, radiation chambers and associated passes and forming the wall 4 extend between a lower drum 15 supplied by downcomers 58, 59 and a steam and water drum 16 which is equipped with separators as described in Specification 526,825. The lower ends of the passes 5, 6 are spanned by secondary superheater tube banks 82...85. Above the superheater 82 the passes 5, 6 respectively contain primary superheater banks 66...69 and reheater banks 72...75, economizers 64, 65 being respectively located at the tops of the passes 5, 6. Steam flows from the drum 16 to a superheater inlet header 70 and thence serially through the banks 66...69, the bank 82, an interstage attemperator 87, suitably of the form described in Specification 656,551, and banks 85, 84, 83, to an outlet header 78. Steam to be reheated enters a header 76, flows through banks 72...75 and discharges from headers 80, 81. The superheater and reheater passes 5, 6 have respective lateral outlets 88, 90 controlled by proportioning dampers 89, 93 and leading into a common outlet duct 94. From the outlet duct cool flue gas is withdrawn by a fan which delivers it to ducts 103, 104 disposed horizontally above the rows of cyclone furnaces, whence a number of spaced, damper-controlled ducts 105, 106 deliver the gas through outlets 107, 108 in a downward direction into the lower regions 38, 39 of the radiation chambers 2, 3. The recirculated gas is also delivered through a damper-controlled duct into a space or chamber 37 formed in the wall 4 by spacing apart the tubes 97, 98 thereof, gas outlets 99, 100 from this chamber into the regions 38, 39 being formed by offsetting the tubes 97, 98. The gas recirculation ducting is protected from reverse flow of hot gas in the manner described in Specification 778,712. In operation, the dampers 89, 93 proportion the gas flow between the passes 5, 6 to control the reheat temperature, the superheat temperature being controlled by the attemperator 87. The total heat available for steam heating is controlled by varying the rate of gas recirculation, the gas flow from opposite sides of the lower regions 38, 39 of the chambers 2, 3 creating highly turbulent conditions resulting in thorough mixing of the fresh and recirculated gas. Inequality in temperature across the width of the chambers 2, 3 is rectified by adjusting the gas recirculation to different regions thereof.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1423156A GB807282A (en) | 1956-05-08 | 1956-05-08 | Improvements in tubulous vapour generating and vapour heating units |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1423156A GB807282A (en) | 1956-05-08 | 1956-05-08 | Improvements in tubulous vapour generating and vapour heating units |
Publications (1)
Publication Number | Publication Date |
---|---|
GB807282A true GB807282A (en) | 1959-01-14 |
Family
ID=10037413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1423156A Expired GB807282A (en) | 1956-05-08 | 1956-05-08 | Improvements in tubulous vapour generating and vapour heating units |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB807282A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1985918A2 (en) * | 2006-10-13 | 2008-10-29 | Hitachi Power Europe GmbH | Vertical single-pass boiler with flue gas damper |
EP2660512A3 (en) * | 2012-05-05 | 2018-04-25 | General Electric Technology GmbH | Enhanced flue gas damper mixing device |
-
1956
- 1956-05-08 GB GB1423156A patent/GB807282A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1985918A2 (en) * | 2006-10-13 | 2008-10-29 | Hitachi Power Europe GmbH | Vertical single-pass boiler with flue gas damper |
EP1985918A3 (en) * | 2006-10-13 | 2009-09-30 | Hitachi Power Europe GmbH | Vertical single-pass boiler with flue gas damper |
EP2660512A3 (en) * | 2012-05-05 | 2018-04-25 | General Electric Technology GmbH | Enhanced flue gas damper mixing device |
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