CN110397908A - A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit - Google Patents
A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit Download PDFInfo
- Publication number
- CN110397908A CN110397908A CN201910769688.2A CN201910769688A CN110397908A CN 110397908 A CN110397908 A CN 110397908A CN 201910769688 A CN201910769688 A CN 201910769688A CN 110397908 A CN110397908 A CN 110397908A
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- China
- Prior art keywords
- steam
- tube socket
- header
- vapor
- degrees celsius
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- 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.)
- Pending
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- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000005269 aluminizing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- 229910002467 CrFe Inorganic materials 0.000 description 1
- 229910017372 Fe3Al Inorganic materials 0.000 description 1
- 229910015372 FeAl Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
- F22B37/225—Arrangements on drums or collectors for fixing tubes or for connecting collectors to each other
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a kind of boiler header tube sockets for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit, including the finishing superheater outlet header or final reheater outlet header (1) manufactured by P92 large-diameter pipe, and the header tube socket (2) manufactured by T92 small-bore pipe；Wherein, one end of header tube socket (2) and finishing superheater outlet header or final reheater outlet header (1) weld, and the finishing superheater or final reheater pipe (3) in the other end and boiler penthouse weld.The present invention can be with long service in 600-620 celsius temperature steam ambient, and the oxidation resistance in steam of component can improve 1000 times.
Description
Technical field
The invention belongs to boiler manfacturing fields, and in particular to one kind is used for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit
Boiler header tube socket.
Background technique
P92 steel is the appropriate content for reducing Mo element on the basis of P91 steel, while 1.8% or so W is added, and pass through
Cross the New Heat-Resistant Steel adding micro B and improveing, creep rupture strength with higher, antifatigue, anti-steam oxidation, processing work
Skill and welding performance, maximum operation (service) temperature are mainly used for Main Steam Piping of Ultra Supercritical Units up to 625 DEG C.From 2006 12
Month, since Yuhuan Power Plant #1 unit is successfully put into commercial operation as Chinese first 1000MW extra-supercritical unit, P92 steel as
The widely applied New Heat-Resistant Steel of China's construction of fire and electricity in recent years, in Specification Design, manufacture processing, welding installation, in-service surveillance
Etc. had accumulated a large amount of experience.
In recent years, the highest throttle (steam) temperature that comercial operation unit has been put into has reached 620 degrees Celsius.According to ASME's
Regulation, P92 meet vapor (steam) temperature lower than 620 DEG C of headers and the requirement of the elevated temperature strength of pipeline, and still, P92 steel is under the conditions of thermal technology
The oxidation occurred when work, oxide layer internal layer are the very thin CrFe containing a large amount of cation vacancies2O4Single-phase no crystal boundary
Non-crystal structure；Middle layer is thicker CrFe2O4Single-phase thin equiax crystal and the thick columnar crystal structure grown on it；Outer layer is
Fe3O4-Fe2O3Thin equiax crystal and the thick columnar crystal structure that grows on it.The three-decker of oxide layer generates in order,
Preceding layer (internal layer) or the first two layer (internal layer and middle layer) can only occur in three-decker, can also all occur, in each of oxide layer
In layering, the Fe of outer layer3O4-Fe2O3Thick column crystal layer is worst to the adhesive force of matrix, therefore the peeling of oxide layer tends to
The problems such as outer layer occurs, and the oxide skin to fall off is passed to all parts of unit with working medium and causes plugging, erosion corrosion.Cause
This solves the problems, such as thickening and falling off for P92 header and pipeline steam side oxide layer from the angle of the actual use of power plant,
To the service life of the generation and extension pipe that reduce quick-fried leakage accident, the safety operation level of boiler is improved, there is important meaning
Justice.
Summary of the invention
The present invention provides a kind of boiler header tube sockets for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit, respectively
Collection box main body and small-bore tube socket is manufactured by P92 and T92 large-diameter pipe, and inner wall is using aluminising processing, with solve P92 header and
Pipeline steam side oxide layer thicken and the problem that falls off.
The present invention adopts the following technical scheme that realize:
A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit, including by P92 large-diameter pipe
The finishing superheater outlet header or final reheater outlet header of manufacture, and the header tube socket manufactured by T92 small-bore pipe；
Wherein, one end of header tube socket and finishing superheater outlet header or final reheater outlet header weld, the other end and boiler
Finishing superheater or final reheater tube welding in ceiling.
A further improvement of the present invention lies in that the material of finishing superheater or final reheater pipe be T92,
TP347HFG, Super304H or HR3C austenitic stainless steel.
A further improvement of the present invention lies in that finishing superheater outlet header or final reheater outlet header and collecting box pipe
Aluminized coating is provided on the inner wall of seat.
A further improvement of the present invention lies in that aluminized coating is made of gas phase aluminising, pack aluminizing or slurry aluminising.
The present invention has following beneficial technical effect:
A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit provided by the invention uses
P92 martensite steel manufacture after aluminising, the alloy structure of parts surface are FeAl by Martensitic phase transformationxPhase.It is closed relative to P92
The martensitic phase of gold, FeAlxMutually there is lower oxidation rate, oxidation product is also changed by the rich Fe oxide of multilayer
Al2O3.Therefore, the present invention can be with long service in 600-620 celsius temperature steam ambient, the oxidation resistance in steam energy of component
Improve 1000 times (Fig. 2).
Further, welding between the tube socket and the finishing superheater outlet header or final reheater outlet header is made
The wlding welded between wlding and the tube socket and the superheater or reheater is all made of P92/T92 alloy wlding.
Further, it is synchronized in the PWHT procedures of the header and tube socket and implements alumetizing process to improve header
With tube socket in 600-620 degrees Celsius of anti-steam oxidation ability, alumetizing process can be gas phase aluminising, pack aluminizing or slurry
Aluminising.
Detailed description of the invention
Fig. 1 is a kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit provided by the invention
Schematic diagram.
Fig. 2 is the weight gain comparison diagram of oxidation 500h of the P92 steel in 650 DEG C of steam before and after aluminising.
In figure: 1 is finishing superheater outlet header or final reheater outlet header, and 2 be header tube socket, and 3 be final stage mistake
Hot device or final reheater pipe, 4 be P92 weld seam, and 5 be aluminized coating.
Specific embodiment
The present invention is made further instructions below in conjunction with attached drawing.
A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit provided by the invention, it is such as attached
Shown in figure.Wherein: 1 is finishing superheater outlet header or final reheater outlet header, and material is P92 large-diameter pipe；2 be collection
Case tube socket, material are T92 small-bore pipe (straight tube or bend pipe)；3 be finishing superheater or final reheater pipe, and pipe material is
T92, TP347HFG, Super304H or HR3C austenitic stainless steel；4 be P92 weld seam；5 be inner wall aluminized coating.
For manufacturing and designing the tube socket of 620 DEG C of extra-supercritical unit final reheater outlet headers of vapor (steam) temperature, with P92
Large-diameter pipe manufacture outlet header, with T92 nickel-base alloy small-bore pipe manufacture header tube socket, with T92, TP347HFG,
It is finishing superheater or final reheater pipe that Super304H or HR3C austenitic stainless steel small-bore pipe, which is used as,.Part dimension
It is calculated according to design parameter.
It is synchronous in the PWHT procedures of designed header and tube socket to implement alumetizing process, heat treatment process 760
DEG C, keep the temperature 6 hours.Using powder aluminizing cementation, aluminizing medium is filled into entire header and tube socket inner space.
According to version ASME " boilers and pressure vessel specification " in 2013, P92/T92 alloy composition, mechanical property and maximum
It need to be with stress as shown in table 1-3:
The chemical component of 1 P92/T92 steel of table
The mechanical property of 2 P92/T92 of table
| ASME | Tensile strength | Yield strength | Elongation, % | Hardness, HB |
| CC2179-3 | ≥620MPa | ≥440MPa | ≥20 | ≤250 |
The allowable stress of 3 P92/T92 of table
| 575℃ | 600℃ | 625℃ | 649℃ | |
| P92/T92 | 99.5 | 77.0 | 56.5 | 38.3 |
In PWHT procedures after synchronous implementation alumetizing process, until the aluminized coating of 20 μ m-thicks, the main object phase of aluminized coating
For Fe3Al, the average content of aluminium is 12% (mass fraction) in coating.Fig. 2 is aluminising front and back P92 steel in 650 DEG C of steam
Aoxidize the weight gain comparison of 500h, it is seen that after aluminising processing, the oxidation rate of P92 is significantly reduced, and oxide skin extrapolation in 100,000 hours is thick
Degree is no more than 1mm, meets the needs of being on active service for a long time in 650 DEG C of steam.
Provided according to ASME: the elevated temperature strength of P92/T92 steel meets 620 DEG C of vapor (steam) temperature of use demand, by inner wall
After aluminising processing, the anti-saturation steam oxidation performance of P92/T92 steel meets the needs of 650 DEG C of long services.Therefore, of the invention
A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit is lower than 620 DEG C in vapor (steam) temperature
When it is safe and reliable.
Claims (4)
1. a kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit, which is characterized in that including by
The finishing superheater outlet header or final reheater outlet header (1) of P92 large-diameter pipe manufacture, and by T92 small-bore pipe
The header tube socket (2) of manufacture；Wherein, one end of header tube socket (2) and finishing superheater outlet header or final reheater export
Header (1) is welded, and the finishing superheater or final reheater pipe (3) in the other end and boiler penthouse weld.
2. a kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit according to claim 1,
It is characterized in that, the material of finishing superheater or final reheater pipe (3) is T92, TP347HFG, Super304H or HR3C
Austenitic stainless steel.
3. a kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit according to claim 1,
It is characterized in that, being all provided on the inner wall of finishing superheater outlet header or final reheater outlet header (1) and header tube socket (2)
It is equipped with aluminized coating (5).
4. a kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit according to claim 3,
It is characterized in that, aluminized coating (5) is made of gas phase aluminising, pack aluminizing or slurry aluminising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769688.2A CN110397908A (en) | 2019-08-20 | 2019-08-20 | A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769688.2A CN110397908A (en) | 2019-08-20 | 2019-08-20 | A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110397908A true CN110397908A (en) | 2019-11-01 |
Family
ID=68328732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910769688.2A Pending CN110397908A (en) | 2019-08-20 | 2019-08-20 | A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110397908A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236382A (en) * | 2021-05-28 | 2021-08-10 | 西安热工研究院有限公司 | Secondary reheating 650 ℃ ultra-supercritical unit system |
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|---|---|---|---|---|
| CN105066104A (en) * | 2015-08-05 | 2015-11-18 | 上海锅炉厂有限公司 | Boiler header tube base of 620-DEG C steam parameter unit |
| CN206112893U (en) * | 2016-06-28 | 2017-04-19 | 上海锅炉厂有限公司 | 620 collection case of DEG C steam condition ultra supercritical unit boiler |
| CN206130951U (en) * | 2016-06-28 | 2017-04-26 | 上海锅炉厂有限公司 | Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers |
| CN210511615U (en) * | 2019-08-20 | 2020-05-12 | 华能国际电力股份有限公司 | Boiler header pipe seat for 600-plus-620-DEG C steam temperature thermal power generating unit |
-
2019
- 2019-08-20 CN CN201910769688.2A patent/CN110397908A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066104A (en) * | 2015-08-05 | 2015-11-18 | 上海锅炉厂有限公司 | Boiler header tube base of 620-DEG C steam parameter unit |
| CN206112893U (en) * | 2016-06-28 | 2017-04-19 | 上海锅炉厂有限公司 | 620 collection case of DEG C steam condition ultra supercritical unit boiler |
| CN206130951U (en) * | 2016-06-28 | 2017-04-26 | 上海锅炉厂有限公司 | Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers |
| CN210511615U (en) * | 2019-08-20 | 2020-05-12 | 华能国际电力股份有限公司 | Boiler header pipe seat for 600-plus-620-DEG C steam temperature thermal power generating unit |
Non-Patent Citations (1)
| Title |
|---|
| 安小勇;: "超超临界锅炉高温材料的选择和应用", 科技创新导报, no. 30 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236382A (en) * | 2021-05-28 | 2021-08-10 | 西安热工研究院有限公司 | Secondary reheating 650 ℃ ultra-supercritical unit system |
| CN113236382B (en) * | 2021-05-28 | 2022-08-30 | 西安热工研究院有限公司 | Secondary reheating 650 ℃ ultra-supercritical unit system |
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