GB1155291A - Improvements in or relating to Forced-Flow Boilers. - Google Patents

Improvements in or relating to Forced-Flow Boilers.

Info

Publication number
GB1155291A
GB1155291A GB4179666A GB4179666A GB1155291A GB 1155291 A GB1155291 A GB 1155291A GB 4179666 A GB4179666 A GB 4179666A GB 4179666 A GB4179666 A GB 4179666A GB 1155291 A GB1155291 A GB 1155291A
Authority
GB
United Kingdom
Prior art keywords
steam
drum
superheater
water
passes
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
GB4179666A
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.)
DUERRWERKE AG
Original Assignee
DUERRWERKE AG
Duerrwerke 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 DUERRWERKE AG, Duerrwerke AG filed Critical DUERRWERKE AG
Publication of GB1155291A publication Critical patent/GB1155291A/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
    • 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
    • F22B35/101—Control systems for steam boilers for steam boilers of forced-flow type of once-through type operating with superimposed recirculation during starting or low load periods, e.g. composite boilers
    • 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

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)

Abstract

1,155,291. Raising steam in forced flow boilers; heating feedwater; controlling superheat temperatures. DURRWERKE A.G. 19 Sept., 1966 [18 Sept., 1965], No. 41796/66. Heading F4A. A once through forced flow boiler comprises a preheater 5, an evaporator 6, and first and second superheaters 7, 9 connected in series. Steam from the outlet of superheater 9 passes through turbines 10, 12 and an intermediate reheater 11 on its way to a condenser 13 from where the condensed steam passes back to a storage tank 1. A feed pump 2 then supplies water from a tank 1 through control valve 3 and a control preheater 4 comprising a bank of U-tubes 25 in a cylindrical drum, to the preheater 5. On start up and during low load operation, valve 8 between superheaters 7 and 9 is closed, so that fluid from superheater 7 passes to a separator 16. Steam from the separator 16 passes to the superheater 9 whilst water drains through line 16a to drum 4 to preheat the boiler feedwater in tubes 25. Water from drum 4 is returned to tank 1 through a line containing valve 17 which is regulated in dependence upon the water level in the drum 4, the water temperature in the tank 1 and the steam temperature leaving superheater 9, to maintain a suitable water level. An overflow line from drum 4 is also provided. As start up proceeds, some steam is passed through line 16a from separator 16 to drum 4 to heat the feed water in tubes 25 which then act as a condenser. Variation of water level in drum 4 controls the proportion of steam so returned, and thus the amount of steam passed through superheater 9, and so can control the steam outlet temperature at point 20. In a modification (not shown), the water level control may be effected in a separate vessel arranged downstream of the preheating drum.
GB4179666A 1965-09-18 1966-09-19 Improvements in or relating to Forced-Flow Boilers. Expired GB1155291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1965D0048241 DE1290940B (en) 1965-09-18 1965-09-18 Device for starting up and for the low-load operation of once-through steam generators

Publications (1)

Publication Number Publication Date
GB1155291A true GB1155291A (en) 1969-06-18

Family

ID=7051013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4179666A Expired GB1155291A (en) 1965-09-18 1966-09-19 Improvements in or relating to Forced-Flow Boilers.

Country Status (2)

Country Link
DE (1) DE1290940B (en)
GB (1) GB1155291A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261301A (en) * 1978-04-28 1981-04-14 Kraftwerk Union Aktiengesellschaft Temperature holding device for water collecting vessels of once-through steam generators

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1915583B1 (en) * 1969-03-27 1970-04-23 Neckarwerke Elek Zitaetsversor Process for influencing the steam outlet temperature in a once-through steam generator with superimposed circulation during start-up and at partial load
CH635184A5 (en) * 1978-12-22 1983-03-15 Sulzer Ag STEAM GENERATOR SYSTEM.
DE19907451A1 (en) * 1999-02-22 2000-08-24 Abb Alstom Power Ch Ag Method for starting a once-through waste heat boiler and device for carrying out the method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US183896A (en) * 1876-10-31 Improvement in seed-planters
DE596823C (en) * 1930-11-08 1934-05-17 Fried Krupp Germaniawerft Akt Device for controlling a high-pressure pipe steam boiler system with forced flow of water
DE802458C (en) * 1949-08-03 1951-02-12 Babcock & Wilcox Dampfkessel W Forced steam generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261301A (en) * 1978-04-28 1981-04-14 Kraftwerk Union Aktiengesellschaft Temperature holding device for water collecting vessels of once-through steam generators

Also Published As

Publication number Publication date
DE1290940B (en) 1969-03-20

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