CN105003903A - Boiler header of ultrahigh steam parameter unit of more than 650 DEG C - Google Patents
Boiler header of ultrahigh steam parameter unit of more than 650 DEG C Download PDFInfo
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- CN105003903A CN105003903A CN201510473810.3A CN201510473810A CN105003903A CN 105003903 A CN105003903 A CN 105003903A CN 201510473810 A CN201510473810 A CN 201510473810A CN 105003903 A CN105003903 A CN 105003903A
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- header
- base alloy
- nickel base
- boiler
- iron nickel
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Abstract
The invention relates to a boiler header of an ultrahigh steam parameter unit of more than 650 DEG C. The boiler header comprises a header body and a tube base. One end of the tube base is welded with the header body, and the other end is welded with the pipe of a superheater or a reheater. The boiler header is characterized in that the header body is manufactured by a nickel base alloy large-diameter tube, and the tube base is manufactured by a nickel base alloy small-diameter tube. The material of the boiler superheater outlet header or the reheater outlet header applied in a steam parameter unit of more than 650 DEG C is nickel base alloy large-diameter tube. The tube base made of the nickel base alloy can be applied in operating temperature of higher than 650 DEG C, high-temperature oxidation performance of the material is excellent, and the boiler header has excellent practical value. The nickel base alloy and the superheater or the reheater are welded by an austenite steel small-diameter tube, and postweld heat treatment is not needed, so processing steps are reduced, and production is accelerated.
Description
Technical field
The present invention relates to a kind of outlet header being applied to more than 650 DEG C unit boiler superheaters or reheater.
Background technology
Along with the fast development of national economy, energy shortage and environment worsen day by day serious, and the haze particularly sweeping across the central and east in recent years causes both domestic and external showing great attention to.In air-polluting emission, the discharge capacity of coal fired power plant pollutant (being mainly carbon dioxide) occupies the pith of emission inventory, therefore reduces the discharge capacity of nuisance in power production process and reduces the main strategic target that coal consumption has become heat power station development.Already proving, is the important channel reducing coal consumption and decreasing pollution thing discharge degree by improving steam parameter, the raising generating efficiency of generating set.
Under above-mentioned background, domesticly will build 630 DEG C of reheated steam parameter units.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of outlet header being applicable to 630 DEG C of reheated steam parameter unit boiler superheaters or reheater.
In order to solve the problems of the technologies described above, technical scheme of the present invention there is provided a kind of boiler header of more than 650 DEG C superelevation steam parameter units, comprise header body and base, base one end is welded with header body, the other end and superheater or reheater tube welding, it is characterized in that: header body is manufactured by iron nickel base alloy large-diameter pipe, base is manufactured by iron nickel base alloy small-bore pipe.
Preferably, described superheater or reheater pipe are by high temperature resistant austenite stainless steel making.
Preferably, in described iron nickel base alloy, Cr content is more than 21%, and Fe content is more than 20%, and Ni content is more than 45%; Described iron nickel base alloy is at 650 DEG C of more than allowable stress 80MPa; The linear expansion coefficient of described iron nickel base alloy is between 13 ~ 16.
In order to meet 630 DEG C of reheated steam boiler peaking performance and adapt to unit load variations to the automatic adjusting function requirement of boiler, improve 630 DEG C of unit boiler reheater outlet header property safe and reliable to operation, creative use iron nickel base alloy large-diameter pipe of the present invention is as header simultaneously.Iron nickel base alloy has excellent elevated temperature strength, has excellent anti-steam oxidation ability, can be used for reheater outlet header as excellent alternative materials.
Provided by the inventionly a kind ofly novel be applied to more than 650 DEG C steam parameter unit boiler super-heater exit cases or reheater outlet header, materials'use iron nickel base alloy large-diameter pipe.Use the base of iron nickel base alloy can be applied to the running temperature of more than 650 DEG C, material at high temperature oxidation susceptibility is excellent, has excellent practical value.Iron nickel base alloy welds with superheater or reheater austenitic steel small bore tube not to be needed to carry out post weld heat treatment, reduces processing step, speed production.
Accompanying drawing explanation
Fig. 1 is the part section structural representation of the boiler header of a kind of more than 650 DEG C superelevation steam parameter units provided by the invention.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Composition graphs 1, the invention provides a kind of boiler header of more than 650 DEG C superelevation steam parameter units, comprises header body 1 and base 2.
Header body 1 is manufactured by iron nickel base alloy large-diameter pipe, and base 2 is manufactured by iron nickel base alloy small-bore pipe.Iron nickel base alloy base 2 one end of super-heater exit case or reheater outlet header is welded with iron nickel base alloy header body 1, and the other end welds with superheater or reheater pipe 3, and superheater or reheater pipe 3 material are high temperature resistant austenitic stainless steel.
Iron nickel base alloy chemical composition is as shown in table 1:
| Cr | Fe | Ni |
| ≥21 | ≥20 | ≥45 |
Table 1 iron nickel base alloy chemical component table (wt, %)
The maximum permissible stress of iron nickel base alloy is as shown in table 2:
| Temperature | 650℃ |
| Iron nickel base alloy | ≥80 |
Table 2 maximum permissible stress table (unit: MPa)
Iron nickel base alloy maximum operation (service) temperature can reach 800 DEG C, so be greater than more than 650 DEG C operations, selecting iron nickel base alloy as header, will be more safe and reliable.
Claims (3)
1. the boiler header of one kind more than 650 DEG C superelevation steam parameter units, comprise header body (1) and base (2), base (2) one end is welded with header body (1), the other end welds with superheater or reheater pipe (3), it is characterized in that: header body (1) is manufactured by iron nickel base alloy large-diameter pipe, base (2) is manufactured by iron nickel base alloy small-bore pipe.
2. the boiler header of a kind of more than 650 DEG C superelevation steam parameter units as claimed in claim 1, is characterized in that: described superheater or reheater pipe (3) are by high temperature resistant austenite stainless steel making.
3. the boiler header of a kind of more than 650 DEG C superelevation steam parameter units as claimed in claim 1, it is characterized in that: in described iron nickel base alloy, Cr content is more than 21%, Fe content is more than 20%, and Ni content is more than 45%; Described iron nickel base alloy is at 650 DEG C of more than allowable stress 80MPa; The linear expansion coefficient of described iron nickel base alloy is between 13 ~ 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473810.3A CN105003903A (en) | 2015-08-05 | 2015-08-05 | Boiler header of ultrahigh steam parameter unit of more than 650 DEG C |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473810.3A CN105003903A (en) | 2015-08-05 | 2015-08-05 | Boiler header of ultrahigh steam parameter unit of more than 650 DEG C |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105003903A true CN105003903A (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510473810.3A Pending CN105003903A (en) | 2015-08-05 | 2015-08-05 | Boiler header of ultrahigh steam parameter unit of more than 650 DEG C |
Country Status (1)
| Country | Link |
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| CN (1) | CN105003903A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180463A (en) * | 2017-12-27 | 2018-06-19 | 哈尔滨锅炉厂有限责任公司 | A kind of header of 630 DEG C of advanced ultra-supercritical boilers |
| CN114774667A (en) * | 2022-05-31 | 2022-07-22 | 西安热工研究院有限公司 | Method for preventing post-welding heat treatment cracking of power station header and connecting pipe crater |
| CN115198161A (en) * | 2022-07-25 | 2022-10-18 | 华能国际电力股份有限公司 | Header for 650 ℃ and above grade boiler unit and preparation method thereof |
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| CN101633999A (en) * | 2009-05-26 | 2010-01-27 | 山西太钢不锈钢股份有限公司 | Austenitic stainless steel, steel tube thereof and manufacturing method thereof |
| CN201621680U (en) * | 2010-03-04 | 2010-11-03 | 浙江清园生态热电有限公司 | Steam and water distribution header device of coal-fired fluidized bed boiler |
| CN101906593A (en) * | 2010-08-09 | 2010-12-08 | 钢铁研究总院 | Intercrystalline corrosion-free high temperature and pressure boiler steel pipe and manufacturing method thereof |
| CN101925792A (en) * | 2008-10-07 | 2010-12-22 | 三菱重工业株式会社 | Welded header/nozzle structure |
| CN103556073A (en) * | 2013-10-30 | 2014-02-05 | 西安热工研究院有限公司 | High-temperature alloy cast tube material for 700 DEG C level ultra-supercritical thermal power generating unit reheater and preparation method of high-temperature alloy cast tube material |
| CN104018029A (en) * | 2014-05-21 | 2014-09-03 | 西安热工研究院有限公司 | Rare earth-containing high iron and nickel iron-based double-phase alloy |
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2015
- 2015-08-05 CN CN201510473810.3A patent/CN105003903A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB466256A (en) * | 1936-04-06 | 1937-05-25 | Witkowitzer Bergb Gewerkschaft | Improvements in and relating to the welding of thin-walled tubes to thick-walled containers and the like |
| US6800149B2 (en) * | 2000-09-28 | 2004-10-05 | The Babcock & Wilcox Company | Tapered corrosion protection of tubes at mud drum location |
| CN1576518A (en) * | 2003-07-30 | 2005-02-09 | 株式会社东芝 | Steam turbine power plant |
| US20070221144A1 (en) * | 2004-07-05 | 2007-09-27 | Martin Becker | Establishing a Connection Between Steam Generator Heating Surfaces and a Collector and/or Distributor |
| CN1648275A (en) * | 2005-03-10 | 2005-08-03 | 钢铁研究总院 | High performance nickel saving gas valve alloy material |
| CN101925792A (en) * | 2008-10-07 | 2010-12-22 | 三菱重工业株式会社 | Welded header/nozzle structure |
| CN101633999A (en) * | 2009-05-26 | 2010-01-27 | 山西太钢不锈钢股份有限公司 | Austenitic stainless steel, steel tube thereof and manufacturing method thereof |
| CN201621680U (en) * | 2010-03-04 | 2010-11-03 | 浙江清园生态热电有限公司 | Steam and water distribution header device of coal-fired fluidized bed boiler |
| CN101906593A (en) * | 2010-08-09 | 2010-12-08 | 钢铁研究总院 | Intercrystalline corrosion-free high temperature and pressure boiler steel pipe and manufacturing method thereof |
| CN103556073A (en) * | 2013-10-30 | 2014-02-05 | 西安热工研究院有限公司 | High-temperature alloy cast tube material for 700 DEG C level ultra-supercritical thermal power generating unit reheater and preparation method of high-temperature alloy cast tube material |
| CN104018029A (en) * | 2014-05-21 | 2014-09-03 | 西安热工研究院有限公司 | Rare earth-containing high iron and nickel iron-based double-phase alloy |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180463A (en) * | 2017-12-27 | 2018-06-19 | 哈尔滨锅炉厂有限责任公司 | A kind of header of 630 DEG C of advanced ultra-supercritical boilers |
| CN114774667A (en) * | 2022-05-31 | 2022-07-22 | 西安热工研究院有限公司 | Method for preventing post-welding heat treatment cracking of power station header and connecting pipe crater |
| CN114774667B (en) * | 2022-05-31 | 2023-09-08 | 西安热工研究院有限公司 | Method for preventing power station header and connecting pipe welded junction from cracking after heat treatment |
| CN115198161A (en) * | 2022-07-25 | 2022-10-18 | 华能国际电力股份有限公司 | Header for 650 ℃ and above grade boiler unit and preparation method thereof |
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Application publication date: 20151028 |