EP3014177A1 - Continuous flow steam generator with a two-pass boiler design - Google Patents
Continuous flow steam generator with a two-pass boiler designInfo
- Publication number
- EP3014177A1 EP3014177A1 EP14747337.5A EP14747337A EP3014177A1 EP 3014177 A1 EP3014177 A1 EP 3014177A1 EP 14747337 A EP14747337 A EP 14747337A EP 3014177 A1 EP3014177 A1 EP 3014177A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- steam generator
- walls
- flow
- chamber region
- 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.)
- Granted
Links
- 238000013461 design Methods 0.000 title description 3
- 238000002485 combustion reaction Methods 0.000 claims abstract description 67
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003546 flue gas Substances 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 abstract 5
- 239000012530 fluid Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000265 homogenisation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
- F22B21/341—Vertical radiation boilers with combustion in the lower part
- F22B21/343—Vertical radiation boilers with combustion in the lower part the vertical radiation combustion chamber being connected at its upper part to a sidewards convection chamber
- F22B21/345—Vertical radiation boilers with combustion in the lower part the vertical radiation combustion chamber being connected at its upper part to a sidewards convection chamber with a tube bundle between an upper and a lower drum in the convection pass
-
- 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
- F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
-
- 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
- F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
- F22B29/061—Construction of tube walls
- F22B29/062—Construction of tube walls involving vertically-disposed water tubes
Definitions
- the invention relates to a continuous steam generator according to the preamble of claim 1.
- the invention relates to continuous steam generators for power plants, with a substantially rectangular cross-section combustion chamber and a horizontal flue gas downstream of the combustion chamber on the flue gas side to which a further vertical gas flue can connect.
- a substantially rectangular cross-section combustion chamber and a horizontal flue gas downstream of the combustion chamber on the flue gas side to which a further vertical gas flue can connect.
- Such also called Zweizugkessel construction is beispielswei ⁇ se known from EP 2182278 Al.
- Welding tubes welded together and permeable by a flow medium form both the gas-tight surrounding walls and the gas-permeable grid walls of the continuous-flow steam generator.
- Correspondingly arranged and with the steam generator tubes ver ⁇ switched collector allow the formation of different Edelhabsegmenten groups of parallel steam generator tubes of Um chargedsplin.
- the steam generator tubes of the continuous steam generator can be arranged partially or over the entire length vertically or vertically and / or helically or spirally.
- the continuous steam generator
- the Auslegungsparame ⁇ ter for them to be selected such that in these the average mass flow density at full load of the steam generator is not less than 1200 kg / m2s.
- the equalization of the flow distribution and avoidance of stagnation in the upper vertical bore can not be sufficient as a measure to reduce local temperature imbalances to such an extent that conventional materials such as 13CrMo45 (T12) can be used. In such cases, higher alloyed materials can then be used.
- the upper portion of the materials 7CrWVMoNb9-6 (T23) or 7CrMoVTiB10-10 (T24) dis ⁇ cussed or used, in these materials for the safe operation of the continuous-flow steam generator and the entire power plant, a special attention to the reliabil ⁇ stechnik and durability of welds down ⁇ the need.
- the object of the invention is to provide a continuous steam generator which overcomes the disadvantages described above. This object is achieved with the continuous steam generator with the features of claim 1.
- the zugkessel than two, with one of the combustor flue gas side nachge ⁇ switched horizontal gas are carried out, proposed a novel circuit of the steam generator tubes.
- the steam generator tubes of the front, the rear wall and the side walls are connected in parallel.
- the steam generator tubes of the rear wall then are divided, for example, on the rear wall ⁇ surface, wherein a portion forming the nose and the bottom of the Hori ⁇ zontalgaszuges and a grid at the end of the horizontal and the other part extends unheated behind the nose, and then above a grid at the transition from the combustion chamber to the horizontal gas train forms.
- first collectors are now arranged and interconnected in such a way that the flow medium flowing through the steam generator tubes can be mixed from first heating surface segments of two parallel first enclosing walls from the lower combustion chamber region to the flow medium from second heating surface segments perpendicular to the second enclosing walls Increase of the mass flow density and a homogenization of the temperatures can be achieved.
- the second surrounding walls is a front wall and a rear wall formed from the rear wall, a nose and a grid of the upper combustion chamber region, and are the first order ⁇ replaced by walls two side walls of the lower combustion chamber area of the available-for pipe cooling mass flow increases for the upper front wall and the Rear wall clearly on, as ⁇ sen now in addition to the mass flow of the lower front and rear wall of the mixed mass flow of the two lower side walls is available.
- the mass flow density in the steam generator tubes Schuflä ⁇ chensegmente the front wall and rear wall can be raised, whereby the cooling is improved at this Um chargedsriosplinn.
- second passage collectors and at least one downpipe are arranged and interconnected such that the flow medium can be supplied from the second enclosing walls of the upper combustion chamber area to third heating surface segments of the enclosing walls of the upper combustion chamber area.
- the flow medium is collected in the corresponding collectors at the outlet of the upper front wall and the grating at the end of the horizontal gas ⁇ kars and fed via two downpipes each one of the two upper side walls, the combustion chamber exit grate and the side walls of the horizontal gas.
- the first collectors are connected in such a way that flow medium from heating surface segments can be fed and / or mixed from corner wall regions of the first enclosing walls from the lower combustion chamber region to central wall regions of the second enclosing walls of the upper combustion chamber region.
- the colder flow medium of the edge regions can be supplied to the hotter middle regions of the upper front or rear wall.
- the warmer flowing medium from the sidewall middle is the Käl ⁇ direct zones of the edge portions of the front and rear wall fed ⁇ mixed. Through the mixture, a homogenization of the temperatures of the flow medium is achieved.
- the mass flow available for tube cooling can thus be significantly increased, in particular for the upper front and rear wall.
- the mass flow density in the steam generator gerrohren be raised, whereby the cooling is improved.
- the heat supplied to the two walls now leads to a lower temperature rise because of the larger mass flow of the flow medium.
- a complete mixture can be assumed in the downpipes downstream of the outlet header of the front and rear walls and the grid of the horizontal gas flue.
- the continuous-flow steam generator comprises a combustion chamber 1 with a lower 11 and an upper 12 combustion chamber region, wherein a horizontal gas flue 2 adjoins the upper combustion chamber region 12.
- a horizontal gas flue 2 adjoins the upper combustion chamber region 12.
- a not shown vertical gas can then connect.
- a number of burners not shown in more detail are provided, which burn a liquid, solid or gaseous fuel in the combustion chamber 1.
- the flue gas generated by the combustion then flows into the upper combustion chamber region 12 and from there into the horizontal flue 2.
- the enclosing walls of the combustion chamber and the horizontal flue 2 are formed from each other gas-tight welded steam generator tubes 10, in the flow through a pump not shown in detail - usually Water - is pumped, which is heated by the flue gas produced by the burners.
- the steam generator tubes can 10 or is partially or be oriented vertically or perpendicularly and / or helical or spirally over the entire length.
- the flue gas guide a formed from steam generator tubes of the rear wall R and projecting into the combustion chamber nose N.
- the steam generator tubes of the combustion chamber walls are designed as evaporator tubes.
- the flow medium is vaporized in them and fed to a Wasserabscheidesystem 5 via outlet header 32, 36 and 40 at the upper end of the combustion chamber.
- Wasserabscheidesystem 5 not yet evaporated water is collected and removed. This is particularly necessary in the start, if for safe cooling of the steam generator tubes, a larger amount of flow medium is ⁇ must be pumped, as in a pipe run evaporates who can ⁇ .
- the steam thus generated is passed into the inlet header 6 of the downstream superheater tubes 7, which form the ceiling of the continuous steam generator here.
- Combustion chamber 11 is the flow medium from second Schuvidsegmenten H9 and H10 of the front and rear walls F and R of the upper combustion chamber portion 12 is admixed as a second enclosure wall. It should be noted that in the upper combustion chamber region 12, the bore of the rear wall R above the first collector 31 merges seamlessly into a region formed as a nose N and then into a subsequent grid G at the exit of the horizontal extension 2, and thus together the heating surface. form H10 segments of a back wall.
- the front wall F and of the grid G as an outlet collector formed collectors 35 are provided and 37 at the upper end of the upper combustion chamber portion 12 at the off ⁇ occurs and so each having a down pipe 4 on each side of the parallel side walls S interconnected, that the flow medium from the second heating surface segments H9 of the second enclosing wall F of the upper combustion chamber region 12 and H10 of the rear wall R, the nose N and the grating G of the horizontal gas flue 2 third Thompsonflä- chenegmenten H3-H5 the lateral enclosing walls S of obe ⁇ ren combustion chamber region 12 and / or fourth Thompson insectsseg ⁇ ments H6 lateral enclosing walls of the horizontal gas flue 2 and / or via a collector 36 ⁇ a arranged in the transition between the upper combustion chamber region 12 and horizontal flu
- segmentation of the front wall F and the rear wall or from parts of the rear wall R of the upper combustion chamber portion 12 of the nose N and the grid G fabric ⁇ th back wall is not visible in the figure due to the lateral view, but may be similar to the segmentation of the Side walls shown in corresponding Edelflä ⁇ chensegmente done.
- the steam generator tubes of the internal ⁇ chamber of a process executed as Zweizugkessel fürlaufdampfer- zeugers means an additional design effort for the piping between the lower sidewall outlet headers and the upper front and rear wall, as well as additional items at the inlet of the upper side walls.
- the use of the materials T23 and T24 and the associated difficulties in processing can thus be largely avoided by the circuit according to the invention and also the operating conditions of power plants are conceivable with the circuit according to the invention, in which the continuous steam generator or a continuous steam generator designed as Zwangs knocklauf- steam generator with higher live steam temperatures in the range of 600 ° C to 700 ° C to be operated.
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)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Gas Burners (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14747337T PL3014177T3 (en) | 2013-08-06 | 2014-07-25 | Continuous flow steam generator with a two-pass boiler design |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013215457.7A DE102013215457A1 (en) | 2013-08-06 | 2013-08-06 | Continuous steam generator in two-pass boiler design |
PCT/EP2014/066062 WO2015018667A1 (en) | 2013-08-06 | 2014-07-25 | Continuous flow steam generator with a two-pass boiler design |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3014177A1 true EP3014177A1 (en) | 2016-05-04 |
EP3014177B1 EP3014177B1 (en) | 2017-05-17 |
Family
ID=51265671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14747337.5A Active EP3014177B1 (en) | 2013-08-06 | 2014-07-25 | Continuous flow steam generator with a two-pass boiler design |
Country Status (9)
Country | Link |
---|---|
US (1) | US9671105B2 (en) |
EP (1) | EP3014177B1 (en) |
JP (1) | JP6203958B2 (en) |
KR (1) | KR101841372B1 (en) |
CN (1) | CN105473939B (en) |
DE (1) | DE102013215457A1 (en) |
DK (1) | DK3014177T3 (en) |
PL (1) | PL3014177T3 (en) |
WO (1) | WO2015018667A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10415819B2 (en) * | 2016-04-05 | 2019-09-17 | The Babcock & Wilcox Company | High temperature sub-critical boiler with common steam cooled wall between furnace and convection pass |
US10429062B2 (en) * | 2016-04-05 | 2019-10-01 | The Babcock & Wilcox Company | High temperature sub-critical boiler with steam cooled upper furnace |
EP3461472B2 (en) * | 2017-10-02 | 2023-12-27 | Peter Greven Physioderm GmbH | Sensitive skin cleanser with enhanced cleaning effect |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3102514A (en) * | 1959-10-07 | 1963-09-03 | Combustion Eng | High capacity, high temperature vapor generator |
US3245385A (en) * | 1963-08-07 | 1966-04-12 | Babcock & Wilcox Co | Forced flow vapor generating unit |
US3927646A (en) * | 1965-04-13 | 1975-12-23 | Babcock & Wilcox Co | Vapor generator |
US3280799A (en) * | 1965-08-26 | 1966-10-25 | Combustion Eng | Fluid heater support arrangement |
US3307524A (en) * | 1965-09-16 | 1967-03-07 | Combustion Eng | Fluid heater support |
US3368535A (en) * | 1965-12-20 | 1968-02-13 | Combustion Eng | Vapor generator construction |
US3358650A (en) * | 1965-12-27 | 1967-12-19 | Combustion Eng | Water cooled furnace joint for mixing header arrangement |
US3434460A (en) * | 1966-11-30 | 1969-03-25 | Combustion Eng | Multicircuit recirculation system for vapor generating power plant |
US3548788A (en) | 1969-01-23 | 1970-12-22 | Foster Wheeler Corp | Once-through vapor generator with division wall |
US3545409A (en) * | 1969-05-07 | 1970-12-08 | Babcock & Wilcox Co | Offset mix tubes |
US3665893A (en) * | 1970-12-29 | 1972-05-30 | Babcock & Wilcox Co | Vapor generator tube arrangement |
US3983903A (en) * | 1974-12-23 | 1976-10-05 | Combustion Engineering, Inc. | Multiple orifice assembly |
DE2557427A1 (en) * | 1975-12-19 | 1977-06-30 | Kraftwerk Union Ag | CIRCUIT OF A FIRE ROOM LUG IN A FLOW-THROUGH BOILER WITH GAS-TIGHT WELDED WALLS IN TWO CONSTRUCTION |
DE3863153D1 (en) * | 1987-09-21 | 1991-07-11 | Siemens Ag | METHOD FOR OPERATING A CONTINUOUS STEAM GENERATOR. |
US5560322A (en) | 1994-08-11 | 1996-10-01 | Foster Wheeler Energy Corporation | Continuous vertical-to-angular tube transitions |
JPH08327006A (en) * | 1995-05-31 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Supercritical variable pressure once-through boiler |
JPH08327007A (en) * | 1995-06-01 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Supercritical variable pressure once-through boiler |
DE19717158C2 (en) * | 1997-04-23 | 1999-11-11 | Siemens Ag | Continuous steam generator and method for starting up a continuous steam generator |
WO1998051964A1 (en) * | 1997-05-09 | 1998-11-19 | Siemens Aktiengesellschaft | Continuous steam generator |
DE19914761C1 (en) * | 1999-03-31 | 2000-09-28 | Siemens Ag | Fossil fuel through-flow steam generator for electrical power plant has vertical evaporator pipes defined by walls of combustion chamber formed in loop at interface between combustion chamber and horizontal gas flue |
US7878157B2 (en) * | 2004-09-23 | 2011-02-01 | Siemens Aktiengesellschaft | Fossil-fuel heated continuous steam generator |
CN101981373A (en) * | 2008-03-27 | 2011-02-23 | 阿尔斯托姆科技有限公司 | Continuous steam generator with equalizing chamber |
EP2180250A1 (en) * | 2008-09-09 | 2010-04-28 | Siemens Aktiengesellschaft | Continuous-flow steam generator |
EP2182278A1 (en) * | 2008-09-09 | 2010-05-05 | Siemens Aktiengesellschaft | Continuous-flow steam generator |
EP2180251A1 (en) * | 2008-09-09 | 2010-04-28 | Siemens Aktiengesellschaft | Continuous-flow steam generator |
EP2213936A1 (en) * | 2008-11-10 | 2010-08-04 | Siemens Aktiengesellschaft | Continuous-flow steam generator |
DE102010038885B4 (en) | 2010-08-04 | 2017-01-19 | Siemens Aktiengesellschaft | Once-through steam generator |
-
2013
- 2013-08-06 DE DE102013215457.7A patent/DE102013215457A1/en not_active Ceased
-
2014
- 2014-07-25 EP EP14747337.5A patent/EP3014177B1/en active Active
- 2014-07-25 WO PCT/EP2014/066062 patent/WO2015018667A1/en active Application Filing
- 2014-07-25 CN CN201480044547.XA patent/CN105473939B/en not_active Expired - Fee Related
- 2014-07-25 PL PL14747337T patent/PL3014177T3/en unknown
- 2014-07-25 US US14/909,610 patent/US9671105B2/en active Active
- 2014-07-25 KR KR1020167005854A patent/KR101841372B1/en active IP Right Grant
- 2014-07-25 JP JP2016532307A patent/JP6203958B2/en not_active Expired - Fee Related
- 2014-07-25 DK DK14747337.5T patent/DK3014177T3/en active
Also Published As
Publication number | Publication date |
---|---|
DE102013215457A1 (en) | 2015-02-12 |
JP2016529467A (en) | 2016-09-23 |
CN105473939A (en) | 2016-04-06 |
US20160178188A1 (en) | 2016-06-23 |
KR101841372B1 (en) | 2018-03-22 |
KR20160041988A (en) | 2016-04-18 |
EP3014177B1 (en) | 2017-05-17 |
JP6203958B2 (en) | 2017-09-27 |
WO2015018667A1 (en) | 2015-02-12 |
CN105473939B (en) | 2017-07-28 |
PL3014177T3 (en) | 2017-12-29 |
DK3014177T3 (en) | 2017-08-28 |
US9671105B2 (en) | 2017-06-06 |
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