GB937168A - Steam temperature regulation in steam generators - Google Patents

Steam temperature regulation in steam generators

Info

Publication number
GB937168A
GB937168A GB42637/59A GB4263759A GB937168A GB 937168 A GB937168 A GB 937168A GB 42637/59 A GB42637/59 A GB 42637/59A GB 4263759 A GB4263759 A GB 4263759A GB 937168 A GB937168 A GB 937168A
Authority
GB
United Kingdom
Prior art keywords
servomotor
temperature
flow
steam
loop
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
GB42637/59A
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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 Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of GB937168A publication Critical patent/GB937168A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • 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
    • 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
    • F22B35/102—Control systems for steam boilers for steam boilers of forced-flow type of once-through type operating with fixed point of final state of complete evaporation, e.g. in a steam-water separator
    • 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
    • F22B35/104—Control systems by injecting water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature

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)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

937,168. Fluid-pressure servomotor control systems. SULZER FRERES S.A. Dec. 15, 1959 [Dec. 23, 1958], No. 42637/59. Class 135. A steam generator plant comprises at least two heating stages in series, the temperature of the working medium downstream of the second stage being regulated by varying the rate at which water is supplied upstream of said stage, the first stage having a control loop in which the controller desired value is varied in accordance with the value of the manipulated variable of the second stage, viz.: the rate of water supply. As described, Figs. 1, 2a and 2b, the plant comprises a feed pump 2, a pre-heater 3, a feed valve 4, an economizer 6, an evaporator 7, a separator 9 and superheaters 11, 14 and 17. The steam temperature downstream of the superheater is detected by a device 18 to which actuates a P+I hydraulic servomotor control loop 101, 111, 116, 119, 124, 126 controlling a water injection control valve 32 in the line 66. This servomotor loop also receives a signal from a temperature detecting element 15 located downstream of the superheater 14. The signal from the temperature detecting element 15 is also transmitted to a P+I hydraulic servomotor control loop 101<SP>1</SP>, 151, 116<SP>1</SP>, 119<SP>1</SP>, 124<SP>1</SP>, 126<SP>1</SP> controlling the water injection control valve 40 in the line 68. This latter servomotor loop also receives a signal corresponding to the actual water flow in line 66 as measured by a flow meter 35, 137 and transmitted via valves 142, 147 and piston 152. The flow meter 35, 137 may be replaced by means for measuring the displacement of the valve 32 and the temperature detector 12 may be located down. stream of the water injection point of the pipe 68. The servomotor loop 101<SP>1</SP> ... 126<SP>1</SP> also receives a signal corresponding to the steam temperature as detected by a device 12 between the superheaters 11 and 14. A flow meter 50, 137<SP>1</SP> measures the flow in the line 68 and transmits a corresponding hydraulic signal via valves 142<SP>1</SP>, 147<SP>1</SP> and restriction 150 to a piston 152<SP>1</SP> which also receives a signal corresponding to the steam temperature as detected by a device 8 downstream of the evaporator 7. The piston 152<SP>1</SP> actuates a lever 116<SP>11</SP> of a servosystem 116<SP>11</SP>, 119<SP>11</SP>, 124<SP>11</SP>, 168 which transmits a signal to a P+I servomoter control loop 116<SP>111</SP>, 119<SP>111</SP> , 124<SP>111</SP> , 175 which controls the feed valve 4. This latter servomotor system also receives signals from the flow measuring device 10 upstream of the superheater 11 and from the flow measuring device 5 upstream of the economizer 6. In another example, the meter 50 is in a P+I control loop which control a valve in a draw-off pipe of the evaporator 7. The temperature detectors 12 and 15 may be associated with steam flow detectors.
GB42637/59A 1958-12-23 1959-12-15 Steam temperature regulation in steam generators Expired GB937168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH6758958A CH364514A (en) 1958-12-23 1958-12-23 Method for regulating the steam temperature in a steam generator and device for carrying out the method

Publications (1)

Publication Number Publication Date
GB937168A true GB937168A (en) 1963-09-18

Family

ID=4528090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42637/59A Expired GB937168A (en) 1958-12-23 1959-12-15 Steam temperature regulation in steam generators

Country Status (6)

Country Link
US (1) US3096744A (en)
CH (1) CH364514A (en)
DE (1) DE1205979B (en)
FR (1) FR1244634A (en)
GB (1) GB937168A (en)
NL (2) NL235580A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL247180A (en) * 1959-11-20
CH382761A (en) * 1961-02-15 1964-10-15 Sulzer Ag Method and arrangement for regulating a once-through steam generator
NL132446C (en) * 1963-03-25
CH582851A5 (en) * 1974-09-17 1976-12-15 Sulzer Ag
FR2401380A1 (en) * 1977-08-23 1979-03-23 Sulzer Ag Forced circulation steam generator - has injector supplied from tapping between economiser and evaporator and temperature controlled regulator controlling flow to evaporator
EP0149002B1 (en) * 1983-12-21 1989-08-02 GebràœDer Sulzer Aktiengesellschaft Process-variable regulating device for a flowing medium
CH673697A5 (en) * 1987-09-22 1990-03-30 Sulzer Ag

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE386310C (en) * 1922-09-27 1923-12-07 Adolf Mertz Device for increasing the performance of multi-stage steam engines
CH154297A (en) * 1931-05-21 1932-04-30 Sulzer Ag Tubular steam generator.
CH153285A (en) * 1933-07-22 1932-03-15 Sulzer Ag High pressure tubular steam generator.
GB482901A (en) * 1936-10-10 1938-04-07 Superheater Co Ltd An improved method of and means for regulating the temperature of steam delivered by a steam superheating installation
BE532206A (en) * 1953-09-30
US2848983A (en) * 1953-12-23 1958-08-26 Sulzer Ag Vapor or steam generating plant with resuperheaters
GB793341A (en) * 1956-06-27 1958-04-16 Siemens Ag Improvements in or relating to apparatus for regulating a forced-flow, once-through boiler
DE1023046B (en) * 1956-07-27 1958-01-23 Sulzer Ag Method and device for regulating a once-through steam generator

Also Published As

Publication number Publication date
DE1205979B (en) 1965-12-02
NL111390C (en)
FR1244634A (en) 1960-10-28
CH364514A (en) 1962-09-30
US3096744A (en) 1963-07-09
NL235580A (en)

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