GB1052385A - - Google Patents
Info
- Publication number
- GB1052385A GB1052385A GB1052385DA GB1052385A GB 1052385 A GB1052385 A GB 1052385A GB 1052385D A GB1052385D A GB 1052385DA GB 1052385 A GB1052385 A GB 1052385A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vapour
- valve
- superheater
- fluid
- flow
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
- F22B35/14—Control systems for steam boilers for steam boilers of forced-flow type during the starting-up periods, i.e. during the periods between the lighting of the furnaces and the attainment of the normal operating temperature of the steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
- F01K3/20—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by combustion gases of main boiler
- F01K3/22—Controlling, e.g. starting, stopping
-
- 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
- F22B29/12—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 superimposed recirculation during starting and low-load periods, e.g. composite boilers
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
1,052,385. Steam generators. COMBUSTION ENGINEERING Inc. Nov. 12, 1963 [Nov. 20, 1962], No. 44585/63. Heading F4A. In a method of starting a forced flow once through vapour generator in which initially fluid is recirculated through the vapour generating section and a primary superheater, pressure and temperature conditions at the outlet of the primary superheater are accurately measured in a section of the recirculation circuit and the flow to a finishing superheater commenced and controlled in accordance with said conditions to ensure that all the fluid flashes to vapour before entering the finishing superheater. The vapour generator heated by combustion gases consists of a feed pump 12, Fig. 1 (not shown), supplying fluid from a deaerator 14 through a preheater 18 and an economizer 22 to a vapour generating section 24 and primary and finishing superheaters 26, 28 from which vapour passes through a turbine 30 to a condenser 32 with a shut-off valve 55 and a throttling valve 56 arranged in parallel to control the flow between the superheaters 26 and 28. The starting method consists of closing valves 55, 56 opening boiler extraction valves 51, 52 in an extraction line 50 to the condenser, supplying vapour from an auxiliary source 38 to the deaerator 14 and circulating fluid through section 24 and superheater 26 whilst the generator is being fired until the clean-up operation is completed. A feed valve 20 is then closed and with valve 51 set to open only at a given relief pressure, fluid is recirculated by pump 48 through section 24 via conduit 44 and through the superheater 26 via conduit 60. At the same time the turbine is heated and rolled by vapour from the source 38 which first cools the superheater 28. The flow through conduit 60 allows the temperature and pressure before valves 55, 56 to be accurately measured. When conditions ensure the complete flashing to vapour of the fluid, the control element 68 commences to open valve 56, feed valve 20 is opened to pass an equivalent flow to section 24 and the auxiliary vapour flow is reduced by closing valve 42. This continues until the pressure drop across valve 56 becomes negligible when valve 55 is opened and valve 42 closed to establish normal operating conditions. In another embodiment, Fig. 2 (not shown). auxiliary vapour is not used, vapour for cooling superheater 28 and starting turbine 30 being produced by flashing liquid leaving superheater 26 through valve 56.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US238887A US3164134A (en) | 1962-11-20 | 1962-11-20 | Apparatus and method for operating a forced flow once-through vapor generator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1052385A true GB1052385A (en) |
Family
ID=22899732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1052385D Active GB1052385A (en) | 1962-11-20 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3164134A (en) |
BE (1) | BE640158A (en) |
CH (1) | CH433391A (en) |
ES (1) | ES293654A1 (en) |
GB (1) | GB1052385A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369526A (en) * | 1966-02-14 | 1968-02-20 | Riley Stoker Corp | Supercritical pressure boiler |
US3361117A (en) * | 1966-02-18 | 1968-01-02 | Babcock & Wilcox Co | Start-up system for forced flow vapor generator and method of operating the vapor generator |
US3434460A (en) * | 1966-11-30 | 1969-03-25 | Combustion Eng | Multicircuit recirculation system for vapor generating power plant |
US3818872A (en) * | 1973-06-29 | 1974-06-25 | Combustion Eng | Economizer bypass for increased furnace wall protection |
DE102011078205A1 (en) * | 2011-06-28 | 2013-01-03 | Siemens Aktiengesellschaft | Auxiliary steam generator as additional frequency or primary and / or secondary control measure in a steam power plant |
AT517535B1 (en) * | 2015-06-30 | 2018-03-15 | Rudolf Dipl Ing Fh Gutscher | Steam power plant |
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 |
US11371392B1 (en) * | 2021-01-07 | 2022-06-28 | General Electric Company | System and method for improving startup time in a fossil-fueled power generation system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB716524A (en) * | 1951-06-16 | 1954-10-06 | Babcock & Wilcox Ltd | Improvements in or relating to forced flow, once through, steam generating and superheating units |
NL78792C (en) * | 1952-01-05 | |||
US2989038A (en) * | 1956-04-26 | 1961-06-20 | Duerrwerke Ag | Device for starting-up once-through boilers |
BE564616A (en) * | 1957-02-07 | |||
GB851784A (en) * | 1958-03-12 | 1960-10-19 | Sulzer Ag | Forced-flow, once-through steam generators |
NL109863C (en) * | 1958-09-04 | |||
US3019774A (en) * | 1959-09-16 | 1962-02-06 | Dunwerke Ag | Once-through vapor generator |
-
0
- GB GB1052385D patent/GB1052385A/en active Active
-
1962
- 1962-11-20 US US238887A patent/US3164134A/en not_active Expired - Lifetime
-
1963
- 1963-11-19 BE BE640158A patent/BE640158A/xx unknown
- 1963-11-19 ES ES0293654A patent/ES293654A1/en not_active Expired
- 1963-11-19 CH CH1416063A patent/CH433391A/en unknown
Also Published As
Publication number | Publication date |
---|---|
ES293654A1 (en) | 1964-09-01 |
BE640158A (en) | 1964-05-19 |
US3164134A (en) | 1965-01-05 |
CH433391A (en) | 1967-04-15 |
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