GB1269189A - Improvements relating to forced circulation steam generators - Google Patents

Improvements relating to forced circulation steam generators

Info

Publication number
GB1269189A
GB1269189A GB59344/70A GB5934470A GB1269189A GB 1269189 A GB1269189 A GB 1269189A GB 59344/70 A GB59344/70 A GB 59344/70A GB 5934470 A GB5934470 A GB 5934470A GB 1269189 A GB1269189 A GB 1269189A
Authority
GB
United Kingdom
Prior art keywords
evaporator
enthalpy
evaporators
water
steam
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
GB59344/70A
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 GB1269189A publication Critical patent/GB1269189A/en
Expired legal-status Critical Current

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
    • F22B29/02—Steam boilers of forced-flow type of forced-circulation type
    • F22B29/023—Steam boilers of forced-flow type of forced-circulation type without drums, i.e. without hot water storage in the boiler
    • F22B29/026—Steam boilers of forced-flow type of forced-circulation type without drums, i.e. without hot water storage in the boiler operating at critical or supercritical pressure
    • 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
    • F22B35/08—Control systems for steam boilers for steam boilers of forced-flow type of forced-circulation type
    • F22B35/083—Control systems for steam boilers for steam boilers of forced-flow type of forced-circulation type without drum, i.e. without hot water storage in the boiler
    • F22B35/086—Control systems for steam boilers for steam boilers of forced-flow type of forced-circulation type without drum, i.e. without hot water storage in the boiler operating at critical or supercritical pressure
    • 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
    • F22B35/105—Control systems for steam boilers for steam boilers of forced-flow type of once-through type operating at sliding pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,269,189. Forced circulation steam generators. SULZER BROS. Ltd. 14 Dec., 1970 [12 Dec., 1969], No. 59344/70. Heading F4A. A forced flow steam generator of the type having at least two evaporator tube systems traversed by parallel flows of working medium and each comprising a plurality of tube lengths arranged in parallel in respect of the flow of working medium and which cover a boiler wall over at least part of their length is operated with sliding pressure control. When close to critical pressure the output from each evaporator is split: a portion from each being supplied for recirculation to a point upstream of the evaporators and a portion passed to a common superheater means. At or above the critical pressure it is arranged that: a difference of at least 30 Kcal./kg. of working medium is produced between the enthalpy of the working medium leaving each evaporator; and that the evaporator producing medium of the higher enthalpy provides the major portion of superheater input, while that producing medium of lower enthalpy provides the major portion of the medium to be re-circulated. In one embodiment, both evaporators I and II are heated equally but one has its input restricted by valve 39 and will therefore produce working medium of higher enthalpy than the other. The evaporators feed steam/ water separators 21, 22; the water being recirculated at 15 and the steam being passed to superheater 28. Because of the enthalpy difference in the outputs of the evaporators, evaporator II will produce the most steam while evaporator I will produce the most water. In another embodiment, Fig. 5 (not shown), both evaporators are again heated equally but the difference in enthalpy is obtained by shielding one set of evaporator tubes from the boiler wall with reheat tubes. The separators may have their water compartments connected, giving a single water level, and there may be provision to condense saturated steam by spraying it with feed water between the discharge of the lowest enthalpy evaporator and the water level.
GB59344/70A 1969-12-12 1970-12-14 Improvements relating to forced circulation steam generators Expired GB1269189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1850169A CH516766A (en) 1969-12-12 1969-12-12 Method for sliding pressure operation of a forced circulation steam generator

Publications (1)

Publication Number Publication Date
GB1269189A true GB1269189A (en) 1972-04-06

Family

ID=4433418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB59344/70A Expired GB1269189A (en) 1969-12-12 1970-12-14 Improvements relating to forced circulation steam generators

Country Status (10)

Country Link
US (1) US3665895A (en)
BE (1) BE760090A (en)
CA (1) CA919045A (en)
CH (1) CH516766A (en)
DE (1) DE1965078B2 (en)
ES (1) ES386293A1 (en)
FR (1) FR2073680A5 (en)
GB (1) GB1269189A (en)
NL (1) NL149590B (en)
SE (1) SE359636B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954087A (en) * 1974-12-16 1976-05-04 Foster Wheeler Energy Corporation Integral separation start-up system for a vapor generator with variable pressure furnace circuitry
US3983903A (en) * 1974-12-23 1976-10-05 Combustion Engineering, Inc. Multiple orifice assembly
CH599504A5 (en) * 1975-09-26 1978-05-31 Sulzer Ag
CH642155A5 (en) * 1979-08-22 1984-03-30 Sulzer Ag STEAM GENERATOR WITH PARTITION BETWEEN TWO COMBUSTION CHAMBERS.
EP2065641A3 (en) * 2007-11-28 2010-06-09 Siemens Aktiengesellschaft Method for operating a continuous flow steam generator and once-through steam generator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205868A (en) * 1962-08-10 1965-09-14 Duerrwerke Ag Forced flow steam generator
DE1299642B (en) * 1965-02-13 1969-07-24 Steinmueller Gmbh L & C Procedure for starting up steam generators operated with forced flow
US3470853A (en) * 1967-09-08 1969-10-07 Steinmueller Gmbh L & C Steam producing plant and method of operating the same

Also Published As

Publication number Publication date
SE359636B (en) 1973-09-03
NL149590B (en) 1976-05-17
ES386293A1 (en) 1973-03-16
CH516766A (en) 1971-12-15
BE760090A (en) 1971-06-09
CA919045A (en) 1973-01-16
DE1965078A1 (en) 1971-08-05
NL7000650A (en) 1971-06-15
DE1965078B2 (en) 1971-08-15
US3665895A (en) 1972-05-30
FR2073680A5 (en) 1971-10-01

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