GB879032A - A method of starting-up and closing-down a once-through forced-flow, vapour generating and superheating unit, and such a unit - Google Patents
A method of starting-up and closing-down a once-through forced-flow, vapour generating and superheating unit, and such a unitInfo
- Publication number
- GB879032A GB879032A GB38279/57A GB3827957A GB879032A GB 879032 A GB879032 A GB 879032A GB 38279/57 A GB38279/57 A GB 38279/57A GB 3827957 A GB3827957 A GB 3827957A GB 879032 A GB879032 A GB 879032A
- Authority
- GB
- United Kingdom
- Prior art keywords
- superheater
- flow
- boiler
- steam
- forced
- 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
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
- F22G3/008—Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens
-
- 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)
- 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
879,032. Forced-flow steam boilers. DURRWERKE A. G. Dec. 9, 1957 [Dec. 8, 1956], No. 38279/57. Class 123(2) To enable a forced-flow, once-through steam boiler comprising preheating and evaporating sections 22, 23, 24 and an austenitic steel superheater 25 to be started up and closed down without thermal shock damage to the superheater, the boiler has means whereby only superheated steam is admitted to the superheater during these periods. The boiler which is heated by a main burner 27, has additional burners 6, 12 for heating the sections 23, 24 respectively when starting up or shutting down and is provided with three starting lines 4, 10, 17 respectively branching from the tube system at the outlets of the preheater 22, evaporator 23 and superheater 25 and leading to a pressure relieving vessel 19. To start the boiler the feedpump 20 is started and supplies water at minimum load rate and, after a predetermined volume has been supplied, regulators 8, 14 start the burners 27, 6, 12 at minimum load rate. Simultaneously the regulators open the valves 5, 11, 18 respectively controlling the flows in branch lines 4, 10, 17 to settings whereby a major part of the fluid flow is diverted through the branch 4 and a major part of the flow through section 23 is diverted through the branch 10, the remaining part of the flow entering the superheater 25 as superheated steam. When the steam temperature at the superheater inlet 15 reaches the pre-set value the regulator 14 closes the valve 18 sufficiently to pressurize the unit to the desired value. The reduced flow resulting in the sections 23, 24 causes a temperature rise at points 9, 15 to which the regulators respond by gradually closing the valves 5, 11 and the burner valves 7, 13 meanwhile opening the valve 18 at a rate which maintains the pressure at 16 at the superheater inlet constant. The rate at which the valve 18 is opened is reduced if steam is diverted to the turbine for preheating thereof. The reverse procedure is adopted to close down the boiler.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE879032X | 1956-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB879032A true GB879032A (en) | 1961-10-04 |
Family
ID=6818804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB38279/57A Expired GB879032A (en) | 1956-12-08 | 1957-12-09 | A method of starting-up and closing-down a once-through forced-flow, vapour generating and superheating unit, and such a unit |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB879032A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3175367A (en) * | 1962-08-08 | 1965-03-30 | Foster Wheeler Corp | Forced flow vapor generating unit |
US3226932A (en) * | 1960-06-07 | 1966-01-04 | Gilbert Associates | Devices for improving operating flexibility of steam-electric generating plants |
US3240187A (en) * | 1962-12-04 | 1966-03-15 | Hitachi Ltd | Method of starting once-through type boilers |
FR2325879A1 (en) * | 1975-09-26 | 1977-04-22 | Sulzer Ag | FIREPLACE OR GAS HEATED STEAM GENERATOR |
EP0769654A1 (en) * | 1995-10-20 | 1997-04-23 | Exergy, Inc. | Supplying heat to an externally fired power system |
EP3001102A1 (en) * | 2014-09-26 | 2016-03-30 | Stork Thermeq B.V. | A heat recovery unit and power plant |
-
1957
- 1957-12-09 GB GB38279/57A patent/GB879032A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3226932A (en) * | 1960-06-07 | 1966-01-04 | Gilbert Associates | Devices for improving operating flexibility of steam-electric generating plants |
US3175367A (en) * | 1962-08-08 | 1965-03-30 | Foster Wheeler Corp | Forced flow vapor generating unit |
US3240187A (en) * | 1962-12-04 | 1966-03-15 | Hitachi Ltd | Method of starting once-through type boilers |
FR2325879A1 (en) * | 1975-09-26 | 1977-04-22 | Sulzer Ag | FIREPLACE OR GAS HEATED STEAM GENERATOR |
EP0769654A1 (en) * | 1995-10-20 | 1997-04-23 | Exergy, Inc. | Supplying heat to an externally fired power system |
EP3001102A1 (en) * | 2014-09-26 | 2016-03-30 | Stork Thermeq B.V. | A heat recovery unit and power plant |
WO2016046305A1 (en) * | 2014-09-26 | 2016-03-31 | Stork Thermeq B.V. | A heat recovery unit and power plant |
EA032655B1 (en) * | 2014-09-26 | 2019-06-28 | Сторк Термек Б.В. | Heat recovery unit and power plant |
US10570823B2 (en) | 2014-09-26 | 2020-02-25 | Stork Thermeq B.V. | Heat recovery unit and power plant |
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