GB1152501A - Once Through Forced Flow Boilers - Google Patents
Once Through Forced Flow BoilersInfo
- Publication number
- GB1152501A GB1152501A GB47407/66A GB4740766A GB1152501A GB 1152501 A GB1152501 A GB 1152501A GB 47407/66 A GB47407/66 A GB 47407/66A GB 4740766 A GB4740766 A GB 4740766A GB 1152501 A GB1152501 A GB 1152501A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluid
- valve
- passes
- separator
- controlled
- 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
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B29/00—Steam boilers of forced-flow type
- F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
- F22B29/08—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes operating with fixed point of final state of complete evaporation
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
1,152,501. Once through forced flow vapour generators. FOSTER WHEELER CORP. 21 Oct., 1966 [22 Oct., 1965], No. 47407/66. Heading F4A. A once through forced flow vapour generator comprises a Furnace chamber 12 fired by Burners 14; 16; the combustion gases exiting through a tube screen 24 to enter a convection section 30, including parallel front and rear passageways 32; 34. A feed water supply controlled by valve 58, passes through economizer 38 and downcomer 59 to furnace water wall tubes 60 which defines series of passes in the lower part of the furnace enclosure, and then through upper front and side wall tubes 62 to downcomer 64. This leads fluid to upper furnace rear wall 66, tube screens 24 and 28, and horizontal convection pass side walls 70 and floor 72. Downcomer 74 then feeds the fluid to convection pass front, rear, side and division walls 78, 80, 82 and 84 respectively, after which the fluid passes through roof tubes 86 and pressure reducing valves 88, 90 to radiant heated pendant superheater 22. During normal operation, the fluid then flows to finishing superheater 26 and a high pressure turbine (not shown). Intermediate and low pressure reheaters 42, 40 are located in the parallel convection passageways 34, 32 respectively. On start up a 25 to 30% full load fluid flow is established through the circuitry up to outlet header 94 of pendant superheater 22, and since valve 100 ih the line connecting superheaters 22 and 26 is closed, the fluid is passed through valve 102 to flash separator 98. Water from the separator passes through line 106 to a condenser and demineralizer (not shown) and/or to a heat recovery system (not shown), so bypassing finishing superheater 26. Firing at about 15 to 20% of the full load rate is commenced, the flue gases passing the finishing superheater 26 being kept below 1,200 F., flash steam from separator 98 being passed through line 92 to finishing superheater 26 to warm and roll the turbine. Firing continues, and the load is increased till 95% quality steam is produced by outlet header 94, when valve 100 is opened and valve 104 closed, for normal operation, thereby removing separator 98 from fluid circuit. In normal operation, superheat steam temperatures are controlled by varying the firing rate, or the feed water supply, one re-heat steam temperature is controlled by proportioning the gas flow through the parallel passes 32, 34 by means of dampers 52, 54, and the other reheat steam temperature is controlled by varying the gas recirculation rate back to the furnace chamber 12 from the convection pass outlet, through ducts 46 by means of the setting of dampers 50.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US501169A US3345975A (en) | 1965-10-22 | 1965-10-22 | Reheater and superheater circuit arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1152501A true GB1152501A (en) | 1969-05-21 |
Family
ID=23992398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB47407/66A Expired GB1152501A (en) | 1965-10-22 | 1966-10-21 | Once Through Forced Flow Boilers |
Country Status (2)
Country | Link |
---|---|
US (1) | US3345975A (en) |
GB (1) | GB1152501A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104534442A (en) * | 2014-12-28 | 2015-04-22 | 哈尔滨锅炉厂有限责任公司 | Low mass flow speed ultra-supercritical boiler water circulation device and water circulation method |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1298078A (en) * | 1969-06-11 | 1972-11-29 | Ishikawajima Harima Heavy Ind | A double reheating, once through steam generating unit |
US3771498A (en) * | 1972-01-03 | 1973-11-13 | Foster Wheeler Corp | Furnace circuit for variable pressure once-through generator |
JPS61250405A (en) * | 1985-04-26 | 1986-11-07 | 三菱重工業株式会社 | Steam-generating boiler |
WO2002050403A2 (en) * | 2000-12-20 | 2002-06-27 | The Babcock & Wilcox Company | Boiler internal flue gas by-pass damper |
US8042497B2 (en) * | 2007-04-12 | 2011-10-25 | Babcock & Wilcox Power Generation Group, Inc. | Steam generator arrangement |
FI121581B (en) * | 2009-05-08 | 2011-01-14 | Foster Wheeler Energia Oy | Thermal power boiler |
CN102889570B (en) * | 2012-09-11 | 2014-11-12 | 上海锅炉厂有限公司 | Tower-type boiler with primary reheater and secondary reheater |
CN103900067A (en) * | 2014-04-02 | 2014-07-02 | 银龙 | Power economized boiler |
US9920924B2 (en) * | 2016-04-05 | 2018-03-20 | The Babcock & Wilcox Company | High temperature sub-critical boiler with steam cooled upper furnace and start-up methods |
CN105953217B (en) * | 2016-06-24 | 2018-03-13 | 南京电力设备质量性能检验中心 | The 1000MW ultra supercritical double reheat boilers of high reheat steam temperature wide regulating ratio |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB793048A (en) * | 1954-03-08 | 1958-04-09 | Combustion Eng | An improved method of and apparatus for controlling steam temperatures in a reheat steam generator |
CH357742A (en) * | 1958-03-12 | 1961-10-31 | Sulzer Ag | Method and device for influencing the initial state of the steam at at least two intermediate superheaters of a steam generator system assigned to different expansion stages |
CH358096A (en) * | 1958-03-12 | 1961-11-15 | Sulzer Ag | Process for regulating the output temperatures at superheaters in a steam generator system and equipment for carrying out the process |
US3286466A (en) * | 1964-04-24 | 1966-11-22 | Foster Wheeler Corp | Once-through vapor generator variable pressure start-up system |
-
1965
- 1965-10-22 US US501169A patent/US3345975A/en not_active Expired - Lifetime
-
1966
- 1966-10-21 GB GB47407/66A patent/GB1152501A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104534442A (en) * | 2014-12-28 | 2015-04-22 | 哈尔滨锅炉厂有限责任公司 | Low mass flow speed ultra-supercritical boiler water circulation device and water circulation method |
Also Published As
Publication number | Publication date |
---|---|
US3345975A (en) | 1967-10-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |