GB1387716A - Method and apparatus for controlling a steam generator - Google Patents
Method and apparatus for controlling a steam generatorInfo
- Publication number
- GB1387716A GB1387716A GB1650672A GB1650672A GB1387716A GB 1387716 A GB1387716 A GB 1387716A GB 1650672 A GB1650672 A GB 1650672A GB 1650672 A GB1650672 A GB 1650672A GB 1387716 A GB1387716 A GB 1387716A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- feedwater
- deviation
- desired value
- xwi
- 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
- F22B35/00—Control systems for steam boilers
- F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
- F22B35/10—Control systems for steam boilers for steam boilers of forced-flow type of once-through type
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Feedback Control In General (AREA)
Abstract
1387716 Once-through boilers SIEMENS AG 10 April 1972 [14 April 1971] 16506/72 Heading F4A [Also in Division G3] In the control of a once through steam generator 1 (Fig. 1), e.g. to supply a turbogenerator, the specific enthalpy i 1 of slightly superheated steam is maintained at a desired value by adjustment of feed water throughflow rate and/or heating fuel supply in dependence upon a control signal Xw 1 significant of the deviation of the specific enthalpy from the desired value. The control signal Xwi is derived by a computer 21 (Figs. 1, 2), which computes the equation Xwi = Kp.Xwp + Kt.Xwt where Xwp is the deviation of actual pressure P1 in boiler 1 sensed by a sensor 19, from a desired value P 0 ; Xwt is the deviation in actual temperature Ti sensed by a sensor 17, from a desired value T 0 ; Kp + Kt are predetermined values which may be considered constants for small variations about a fixed working point A (desired condition P 0 T 0 ). If however, Xwi is to be determined for a relatively large working range, then KpKt cannot be considered as constants and may for example be varied as a function of load, such as the desired electric power output of a turbogenerator connected to the steam generator. In the Benson boiler 1 (Fig. 1), fuel is fed in at 2 for vaporizing feedwater in-flow 3, controlled by water valve 4. Some water is diverted at 6 to an injection cooler 13 via a valve 14. The feedwater through-flow rate is metered at 8, and the water passes through a preheater 10 and vaporizer 11. Steam leaving 11 is slightly superheated and the temperature and pressure are sensed by the sensors 17, 19 respectively. The steam passes to a superheater 12 and via the injection cooler 13 to superheater 15 and thence to a turbo-generator (not illustrated). Feedwater through flow rate is normally maintained constant by a feedback loop from the flow meter 8 to a comparator or summator 24 where it is compared with a desired value thereof. Any difference value is fed to a controller 25 of an actuator 5 which operates the valve 4. However, in the event of a breakdown in the heating, e.g. a momentary change in calorific value of fuel the resulting enthalpy deviation control signal Xwi fed to summator 24 causes the valve 4 to operate in a sense to maintain the specific enthalpy constant. Other computation circuits 21 are disclosed, with reference to Figs. 3 to 7, for specific operating conditions. For example, the desired specific enthalpy may be intentionally varied by superordinated controllers. Likewise, desired values P 0 and T 0 may be controlled in a load dependent manner, Fig. 8 (not shown), illustrates substantially a combination of Fig. 1, and the computation circuits of Fig. 7, and proportional integral control of the feedwater valve 4 is effected.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2118028A DE2118028A1 (en) | 1971-04-14 | 1971-04-14 | PROCEDURE AND ARRANGEMENT FOR CONTROL ON A HEAT EXCHANGER |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1387716A true GB1387716A (en) | 1975-03-19 |
Family
ID=5804659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1650672A Expired GB1387716A (en) | 1971-04-14 | 1972-04-10 | Method and apparatus for controlling a steam generator |
Country Status (11)
Country | Link |
---|---|
US (1) | US3774396A (en) |
AT (1) | AT317929B (en) |
BE (1) | BE782175A (en) |
CA (1) | CA959562A (en) |
DE (1) | DE2118028A1 (en) |
FI (1) | FI52398C (en) |
FR (1) | FR2133672B1 (en) |
GB (1) | GB1387716A (en) |
IT (1) | IT957176B (en) |
SE (1) | SE7204787L (en) |
ZA (1) | ZA722332B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2166200A (en) * | 1984-10-25 | 1986-04-30 | Westinghouse Electric Corp | Control system for the supply of steam to a steam turbine |
GB2276225A (en) * | 1993-03-12 | 1994-09-21 | Westinghouse Electric Corp | Temperature control of boiler steam |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877636A (en) * | 1973-01-16 | 1975-04-15 | Hitachi Ltd | Automatic starting device for plant |
US4005581A (en) * | 1975-01-24 | 1977-02-01 | Westinghouse Electric Corporation | Method and apparatus for controlling a steam turbine |
CH599504A5 (en) * | 1975-09-26 | 1978-05-31 | Sulzer Ag | |
JPS5814404U (en) * | 1981-07-22 | 1983-01-29 | 株式会社東芝 | rankine cycle device |
US4471620A (en) * | 1981-11-13 | 1984-09-18 | Westinghouse Electric Corp. | Turbine low pressure bypass spray valve control system and method |
DE3243578C3 (en) * | 1982-11-25 | 1998-10-22 | Babcock Energie Umwelt | Method for operating a once-through steam generator |
DE3303548C3 (en) * | 1983-02-03 | 1995-05-18 | Babcock Energie Umwelt | Method for operating a once-through steam generator |
US4451003A (en) * | 1983-06-09 | 1984-05-29 | Exxon Research And Engineering Co. | Control scheme and apparatus for a cogeneration boiler |
US4489679A (en) * | 1983-12-12 | 1984-12-25 | Combustion Engineering, Inc. | Control system for economic operation of a steam generator |
US4557686A (en) * | 1984-07-16 | 1985-12-10 | Phillips Petroleum Company | Control of the flow of fuel to multiple burners |
US4574746A (en) * | 1984-11-14 | 1986-03-11 | The Babcock & Wilcox Company | Process heater control |
US4776301A (en) * | 1987-03-12 | 1988-10-11 | The Babcock & Wilcox Company | Advanced steam temperature control |
WO1993022599A1 (en) * | 1992-05-04 | 1993-11-11 | Siemens Aktiengesellschaft | Forced-flow steam generator |
JP3017623B2 (en) * | 1993-09-28 | 2000-03-13 | 株式会社日立製作所 | Coal gasifier |
WO2000031469A1 (en) * | 1998-11-25 | 2000-06-02 | Masnoi, Sergei Sergeevich | Method for the exploitation of a steam turbine installation |
US7504260B1 (en) * | 2000-05-16 | 2009-03-17 | Lang Fred D | Method and apparatus for controlling gas temperatures associated with pollution reduction processes |
EP1614962A1 (en) * | 2004-07-09 | 2006-01-11 | Siemens Aktiengesellschaft | Method for operating of an once-through steam generator |
EP2065641A3 (en) * | 2007-11-28 | 2010-06-09 | Siemens Aktiengesellschaft | Method for operating a continuous flow steam generator and once-through steam generator |
EP2194320A1 (en) * | 2008-06-12 | 2010-06-09 | Siemens Aktiengesellschaft | Method for operating a once-through steam generator and once-through steam generator |
DE102010040210A1 (en) * | 2010-09-03 | 2012-03-08 | Siemens Aktiengesellschaft | Method for operating a solar-heated continuous steam generator and solar thermal continuous steam generator |
DE102011004269A1 (en) * | 2011-02-17 | 2012-08-23 | Siemens Aktiengesellschaft | Method for operating a solar thermal parabolic trough power plant |
DE102016102777A1 (en) * | 2016-02-17 | 2017-08-17 | Netzsch Trockenmahltechnik Gmbh | Method and apparatus for generating superheated steam from a working fluid |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2853058A (en) * | 1951-06-26 | 1958-09-23 | Yuba Cons Ind Inc | Steam plant and controller |
US3284615A (en) * | 1956-09-24 | 1966-11-08 | Burroughs Corp | Digital control process and system |
US3244898A (en) * | 1959-12-29 | 1966-04-05 | Combustion Eng | Power plant system and control therefor |
NL268011A (en) * | 1960-08-08 | |||
CH397884A (en) * | 1962-09-10 | 1965-08-31 | Sulzer Ag | Process for regulating a nuclear reactor plant and nuclear reactor plant for carrying out the process |
US3338054A (en) * | 1964-12-29 | 1967-08-29 | Combustion Eng | Method and apparatus for increasing control response of a vapor generator |
-
1971
- 1971-04-14 DE DE2118028A patent/DE2118028A1/en active Pending
-
1972
- 1972-04-05 AT AT293572A patent/AT317929B/en not_active IP Right Cessation
- 1972-04-07 ZA ZA722332A patent/ZA722332B/en unknown
- 1972-04-10 GB GB1650672A patent/GB1387716A/en not_active Expired
- 1972-04-12 IT IT7213/72A patent/IT957176B/en active
- 1972-04-12 FI FI721031A patent/FI52398C/en active
- 1972-04-13 CA CA139,598A patent/CA959562A/en not_active Expired
- 1972-04-13 SE SE7204787A patent/SE7204787L/sv unknown
- 1972-04-13 FR FR7212942A patent/FR2133672B1/fr not_active Expired
- 1972-04-14 BE BE782175A patent/BE782175A/en not_active IP Right Cessation
- 1972-04-14 US US00244151A patent/US3774396A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2166200A (en) * | 1984-10-25 | 1986-04-30 | Westinghouse Electric Corp | Control system for the supply of steam to a steam turbine |
GB2166200B (en) * | 1984-10-25 | 1989-05-24 | Westinghouse Electric Corp | Adaptive temperature control system for the supply of steam to a steam turbine |
GB2276225A (en) * | 1993-03-12 | 1994-09-21 | Westinghouse Electric Corp | Temperature control of boiler steam |
Also Published As
Publication number | Publication date |
---|---|
FR2133672A1 (en) | 1972-12-01 |
US3774396A (en) | 1973-11-27 |
FR2133672B1 (en) | 1981-04-10 |
IT957176B (en) | 1973-10-10 |
FI52398C (en) | 1977-08-10 |
BE782175A (en) | 1972-10-16 |
FI52398B (en) | 1977-05-02 |
ZA722332B (en) | 1972-12-27 |
AT317929B (en) | 1974-09-25 |
SE7204787L (en) | 1972-10-16 |
CA959562A (en) | 1974-12-17 |
DE2118028A1 (en) | 1973-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |