CN105066098A - Header of 620-DEG C steam parameter ultra supercritical unit boiler - Google Patents
Header of 620-DEG C steam parameter ultra supercritical unit boiler Download PDFInfo
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Abstract
The invention relates to a header of a 620-DEG C steam parameter ultra supercritical unit boiler. The header of the 620-DEG C steam parameter ultra supercritical unit boiler comprises a header main body and a pipe seat, wherein one end of the pipe seat is welded with the header main body, and the other end of the pipe seat is welded with a final-stage superheater or final-stage reheater pipe. The header is characterized in that the header main body is made by a 9Cr-3W-3Co large-diameter pipe, the pipe seat is made by a 9Cr-3W-3Co small-diameter pipe, the inner diameter of the pipe seat is larger than 35mm, and Ni-based alloy is welded on the inner wall of the pipe seat except the region which is 15-20mm away from the header. The header provided by the invention is a novel superheater outlet header or reheater outlet header applied to the 620-DEG C steam parameter ultra supercritical unit boiler, and the 9Cr-3W-3Co large-diameter pipe is used as the material. The high-temperature oxidation performance of the material is great, and the practical value is high.
Description
Technical field
The present invention relates to and be a kind ofly applied to the outlet header surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit finishing superheaters or final 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, surpass 620 DEG C of reheated steam parameter extra-supercritical unit and arise at the historic moment.Surpass the thermal efficiency that 620 DEG C of reheated steam parameter extra-supercritical unit can improve unit.
Higher because surpassing 620 DEG C of steam parameter machine set outlet header pipe joint temperature, the property safe and reliable to operation of existing boiler export header cannot meet the requirement surpassing 620 DEG C of units.
Summary of the invention
The object of the invention is raising and surpass 620 DEG C of unit boiler outlet header property safe and reliable to operation.
In order to achieve the above object, technical scheme of the present invention there is provided a kind of header surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Units, comprise header body and base, base one end is welded with header body, the other end and finishing superheater or final reheater tube welding, it is characterized in that: header body is manufactured by 9Cr-3W-3Co large-diameter pipe, base is manufactured by 9Cr-3W-3Co small-bore pipe, base internal diameter is greater than 35mm, base except distance header 15 ~ 20mm region except, all the other area inner wall built-up welding nickel-base alloys.
Preferably, described finishing superheater or final reheater pipe are by high temperature resistant austenite stainless steel making.
Preferably, the Cr weight percent content in described 9Cr-3W-3Co is between 8.5%-9.5%, and W weight percent content is between 2.5%-3.5%, and Co weight percent content is between 2.5%-3.5%.
Preferably, described 9Cr-3W-3Co at 650 DEG C of allowable stresses at more than 60MPa.
Preferably, described 9Cr-3W-3Co metallographic structure is martensite.
Surpass 620 DEG C of unit boiler outlet header property safe and reliable to operation for improving, the present invention uses the 9Cr-3W-3Co large-diameter pipe of more high strength to manufacture header.Replace P92 large-diameter pipe to manufacture header with 9Cr-3W-3Co large-diameter pipe, header wall thickness can be reduced, meet the requirement of header fabrication.9Cr-3W-3Co has excellent elevated temperature strength, and good anti-steam oxidation ability, can as excellent alternative materials for the manufacture of boiler export header.
The invention provides a kind of novel being applied to and surpass 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit super-heater exit cases or reheater outlet header, materials'use 9Cr-3W-3Co large-diameter pipe.Material at high temperature oxidation susceptibility is good, has excellent practical value.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation surpassing the header of 620 DEG C of steam parameter Boiler of Ultra-supercritical 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.
The invention provides a kind of novel being applied to and surpass 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit super-heater exit cases or reheater outlet header, materials'use 9Cr-3W-3Co large-diameter pipe and small-bore pipe.As shown in Figure 1, comprise finishing superheater outlet header or final reheater outlet header 1, material is 9Cr-3W-3Co large-diameter pipe; Header base 2, material is 9Cr-3W-3Co small-bore pipe, and header base 2 internal diameter is greater than 35mm, header base 2 except distance finishing superheater outlet header or final reheater outlet header 1 be except the region of 15 ~ 20mm, all the other area inner wall built-up welding nickel-base alloys 4; Finishing superheater or final reheater pipe 3, material is high temperature resistant austenitic stainless steel small-bore pipe, and part dimension calculates according to design parameter.
Header base 2 one end of finishing superheater outlet header or final reheater outlet header 1 is welded with finishing superheater outlet header or final reheater outlet header 1, and the other end welds with finishing superheater or final reheater pipe 3.
9Cr-3W-3Co chemical composition is as shown in table 1:
| Cr | W | Co |
| 8.5-9.5 | 2.5-3.5 | 2.5-3.5 |
Table 19Cr-3W-3Co alloy composition table (wt, %)
The maximum permissible stress of 9Cr-3W-3Co is as shown in table 2:
| Temperature | 650℃ |
| 9Cr-3W-3Co | ＞60 |
Table 2 maximum permissible stress table (unit: MPa).
Claims (5)
1. one kind surpasses the header of 620 DEG C of steam parameter Boiler of Ultra-supercritical Units, comprise header body and base, base one end is welded with header body, the other end and finishing superheater or final reheater tube welding, it is characterized in that: header body is manufactured by 9Cr-3W-3Co large-diameter pipe, base is manufactured by 9Cr-3W-3Co small-bore pipe, and base internal diameter is greater than 35mm, base except distance header 15 ~ 20mm region except, all the other area inner wall built-up welding nickel-base alloys.
2. a kind of header surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Units as claimed in claim 1, is characterized in that: described finishing superheater or final reheater pipe are by high temperature resistant austenite stainless steel making.
3. a kind of header surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Units as claimed in claim 1, it is characterized in that: the Cr weight percent content in described 9Cr-3W-3Co is between 8.5%-9.5%, W weight percent content is between 2.5%-3.5%, and Co weight percent content is between 2.5%-3.5%.
4. a kind of header surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Units as claimed in claim 3, is characterized in that: described 9Cr-3W-3Co at 650 DEG C of allowable stresses at more than 60MPa.
5. a kind of header surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Units as claimed in claim 4, is characterized in that: described 9Cr-3W-3Co metallographic structure is martensite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510473809.0A CN105066098A (en) | 2015-08-05 | 2015-08-05 | Header of 620-DEG C steam parameter ultra supercritical unit boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510473809.0A CN105066098A (en) | 2015-08-05 | 2015-08-05 | Header of 620-DEG C steam parameter ultra supercritical unit boiler |
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| CN105066098A true CN105066098A (en) | 2015-11-18 |
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| CN201510473809.0A Pending CN105066098A (en) | 2015-08-05 | 2015-08-05 | Header of 620-DEG C steam parameter ultra supercritical unit boiler |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864740A (en) * | 2016-06-01 | 2016-08-17 | 哈尔滨锅炉厂有限责任公司 | P93 header for super 623 DEG C advanced ultra supercritical unit boiler |
| CN106016236A (en) * | 2016-06-01 | 2016-10-12 | 哈尔滨锅炉厂有限责任公司 | Container of above-623 DEG C advanced ultra-supercritical unit boiler |
| CN106051728A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Header of 700 DEG C advanced ultra-supercritical unit boiler |
| CN106051725A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | High strength material header of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051726A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Header of ultra 700 DEG C advanced ultra-supercritical unit boiler |
| CN106051727A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | S31035 material header of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051739A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Superheater of 700 DEG C advanced ultra-supercritical unit boiler |
| CN107676764A (en) * | 2017-09-28 | 2018-02-09 | 哈尔滨锅炉厂有限责任公司 | Realize high temperature stainless steel heating surface body to the new transformational structure of ferrite outlet header |
| CN107975786A (en) * | 2017-12-28 | 2018-05-01 | 哈尔滨锅炉厂有限责任公司 | The header of 630 DEG C of steam parameter Boiler of Ultra-supercritical Unit |
| CN108087047A (en) * | 2017-12-28 | 2018-05-29 | 江苏金通灵流体机械科技股份有限公司 | Turbine LP rotors and its electricity-generating method |
| 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 |
| CN116604140A (en) * | 2023-05-10 | 2023-08-18 | 东方电气集团东方锅炉股份有限公司 | High-recatank connecting pipe structure of ultra-supercritical boiler and welding process thereof |
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| CN104372338A (en) * | 2014-11-04 | 2015-02-25 | 西安热工研究院有限公司 | Alloying method of austenitic stainless steel tube surface for boiler superheaters/reheaters |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051739A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Superheater of 700 DEG C advanced ultra-supercritical unit boiler |
| CN105864740A (en) * | 2016-06-01 | 2016-08-17 | 哈尔滨锅炉厂有限责任公司 | P93 header for super 623 DEG C advanced ultra supercritical unit boiler |
| CN106051728A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Header of 700 DEG C advanced ultra-supercritical unit boiler |
| CN106051725A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | High strength material header of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051726A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Header of ultra 700 DEG C advanced ultra-supercritical unit boiler |
| CN106051727A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | S31035 material header of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106016236A (en) * | 2016-06-01 | 2016-10-12 | 哈尔滨锅炉厂有限责任公司 | Container of above-623 DEG C advanced ultra-supercritical unit boiler |
| CN107676764A (en) * | 2017-09-28 | 2018-02-09 | 哈尔滨锅炉厂有限责任公司 | Realize high temperature stainless steel heating surface body to the new transformational structure of ferrite outlet header |
| CN107676764B (en) * | 2017-09-28 | 2019-04-05 | 哈尔滨锅炉厂有限责任公司 | Realize the transformational structure of high temperature stainless steel heating surface tube body to ferrite outlet header |
| 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 |
| CN108087047A (en) * | 2017-12-28 | 2018-05-29 | 江苏金通灵流体机械科技股份有限公司 | Turbine LP rotors and its electricity-generating method |
| CN107975786A (en) * | 2017-12-28 | 2018-05-01 | 哈尔滨锅炉厂有限责任公司 | The header of 630 DEG C of steam parameter Boiler of Ultra-supercritical Unit |
| CN116604140A (en) * | 2023-05-10 | 2023-08-18 | 东方电气集团东方锅炉股份有限公司 | High-recatank connecting pipe structure of ultra-supercritical boiler and welding process thereof |
| CN116604140B (en) * | 2023-05-10 | 2024-06-21 | 东方电气集团东方锅炉股份有限公司 | High-recatank connecting pipe structure of ultra-supercritical boiler and welding process thereof |
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Application publication date: 20151118 |
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