GB809287A - Improvements in or relating to installations for automatic feed-water control of forced circulation boilers - Google Patents

Improvements in or relating to installations for automatic feed-water control of forced circulation boilers

Info

Publication number
GB809287A
GB809287A GB20203/55A GB2020355A GB809287A GB 809287 A GB809287 A GB 809287A GB 20203/55 A GB20203/55 A GB 20203/55A GB 2020355 A GB2020355 A GB 2020355A GB 809287 A GB809287 A GB 809287A
Authority
GB
United Kingdom
Prior art keywords
temperature
regulator
signal
feed water
controller
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
GB20203/55A
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens 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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB809287A publication Critical patent/GB809287A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/02—Arrangements or modifications of condensate or air pumps
    • F01K9/023—Control thereof
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/18—Applications of computers to steam boiler control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
    • F22D5/24—Controlling water feed or water level; Automatic water feeding or water-level regulators with electric switches

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

809,287. Fluid-pressure servomotor-control systems. SIEMENS-SCHUCKERTWERKE A.G. July 12, 1955 [July 12, 1954], No. 20203/55. Class 135. In an automatic feed water control system for a forced circulation boiler comprising a feed water regulator RSp adjustable by a loadsetting device STLa and by a main temperature controller RT1 to which is fed a signal characteristic of the temperature at a first location SSp1 in the circulation system, the feed water regulator is also subject to a control signal from at least one auxiliary temperature controller such as RT2, to which is fed a signal characteristic of the temperature at a location SSp2 in the steam flow downstream from the first location, the controllers RT1, RT2 also being fed with signals characteristic of the desired temperatures at the respective locations under the prevailing load conditions. Such an arrangement minimizes time lags occurring in the regulation due to the thermal capacity of the system. As shown, two auxiliary temperature controllers RT2, RT3 are provided. Each of these are of the type giving control in accordance with the deviation and the rate of change of deviation of the variable. The controller RT1 however, operates also according to the time integral of the deviation. A signal XD representative of the load factor, in this case boiler pressure P acts on a follow-up type pressure controller RD supplying a signal YD to the load setting device STLa. The latter by means of signals WK, WL, WSp respectively adjusts the coal supply regulator RK, the air supply regulator RL, and the feed water regulator RSp. The feed water regulator is adjusted through a follow-up type controller STu which also adjusts a further relay STT by which signals representative of the desired values of the stage temperatures at the prevailing load are fed to the controllers RT1, RT2, RT3, respectively. The circulation system comprises sections SSp1, SSp2, SSp3, &c. and the temperature pick-off points T1, T2, T3 are adjacent the outlet of these sections. The main temperature regulator RT1 also adjusts the coal supply regulator RK. The feed-water regulator RSp is also subject to a signal XSN which is a measure of the temperature deviation at an auxiliary heating surface SN in parallel with the first stage whereby a rapid response of the internal temperature of the first stage is obtained.
GB20203/55A 1954-07-12 1955-07-12 Improvements in or relating to installations for automatic feed-water control of forced circulation boilers Expired GB809287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE809287X 1954-07-12

Publications (1)

Publication Number Publication Date
GB809287A true GB809287A (en) 1959-02-18

Family

ID=6723277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20203/55A Expired GB809287A (en) 1954-07-12 1955-07-12 Improvements in or relating to installations for automatic feed-water control of forced circulation boilers

Country Status (1)

Country Link
GB (1) GB809287A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086503A (en) * 1958-03-12 1963-04-23 Sulzer Ag Method and means for controlling a process or plant
US3172266A (en) * 1963-02-26 1965-03-09 Gilbert Associates Automatic start-up devices for a steamelectric generating plant
US3189008A (en) * 1963-08-21 1965-06-15 Combustion Eng Method and apparatus for controlling a vapor generator operating at supercritical pressure
US3416500A (en) * 1966-12-28 1968-12-17 Combustion Eng Method and system for detecting leaks in a forced through flow steam generator plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086503A (en) * 1958-03-12 1963-04-23 Sulzer Ag Method and means for controlling a process or plant
US3172266A (en) * 1963-02-26 1965-03-09 Gilbert Associates Automatic start-up devices for a steamelectric generating plant
US3189008A (en) * 1963-08-21 1965-06-15 Combustion Eng Method and apparatus for controlling a vapor generator operating at supercritical pressure
US3416500A (en) * 1966-12-28 1968-12-17 Combustion Eng Method and system for detecting leaks in a forced through flow steam generator plant

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