CN105066099A - Collecting box of ultra 620-DEG C steam parameter ultra supercritical unit boiler - Google Patents
Collecting box of ultra 620-DEG C steam parameter ultra supercritical unit boiler Download PDFInfo
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- CN105066099A CN105066099A CN201510474247.1A CN201510474247A CN105066099A CN 105066099 A CN105066099 A CN 105066099A CN 201510474247 A CN201510474247 A CN 201510474247A CN 105066099 A CN105066099 A CN 105066099A
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Abstract
The invention relates to a collecting box of an ultra 620-DEG C steam parameter ultra supercritical unit boiler. The collecting box comprises a collecting box body and a pipe base, wherein one end of the pipe base is welded with the collecting box body, and the other end of the pipe base is welded with a finishing superheater or a final-stage reheater through a pipe. The collecting box is characterized in that the collecting box body is manufactured by a 9Cr-3W-3Co large-caliber pipe; and the pipe base is manufactured by a 9Cr-3W-3Co small-caliber pipe. The invention provides a novel superheater outlet collecting box or reheater outlet collecting box applied to the ultra 620-DEG C steam parameter ultra supercritical unit boiler; the collecting box uses the material of the 9Cr-3W-3Co large-caliber pipe; and the material is excellent in high-temperature oxidation performance, and is excellent in practical value.
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.
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; 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.
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 |
|---|---|---|---|
| CN201510474247.1A CN105066099A (en) | 2015-08-05 | 2015-08-05 | Collecting box of ultra 620-DEG C steam parameter ultra supercritical unit boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510474247.1A CN105066099A (en) | 2015-08-05 | 2015-08-05 | Collecting box of ultra 620-DEG C steam parameter ultra supercritical unit boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105066099A true CN105066099A (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510474247.1A Pending CN105066099A (en) | 2015-08-05 | 2015-08-05 | Collecting box of ultra 620-DEG C steam parameter ultra supercritical unit boiler |
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| CN (1) | CN105066099A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886950A (en) * | 2016-06-01 | 2016-08-24 | 哈尔滨锅炉厂有限责任公司 | 700 DEG C reheater of advanced ultra supercritical unit boiler |
| CN106011686A (en) * | 2016-06-01 | 2016-10-12 | 哈尔滨锅炉厂有限责任公司 | Reheater of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051740A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Superheater of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051729A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Header of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106066035A (en) * | 2016-06-01 | 2016-11-02 | 哈尔滨锅炉厂有限责任公司 | Surpass the G115 header of 623 DEG C of advanced Boiler of Ultra-supercritical Units |
| CN106090875A (en) * | 2016-06-01 | 2016-11-09 | 哈尔滨锅炉厂有限责任公司 | The header of 650 DEG C of advanced Boiler of Ultra-supercritical Units |
Citations (3)
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| US7533633B2 (en) * | 2004-07-05 | 2009-05-19 | Hitachi Power Europe Gmbh | Establishing a connection between steam generator heating surfaces and a collector and/or distributor |
| CN104109830A (en) * | 2014-07-22 | 2014-10-22 | 桂林电子科技大学 | Surface hafnium-infiltrated austenitic stainless steel resistant to high temperature and preparation method thereof |
| 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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2015
- 2015-08-05 CN CN201510474247.1A patent/CN105066099A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7533633B2 (en) * | 2004-07-05 | 2009-05-19 | Hitachi Power Europe Gmbh | Establishing a connection between steam generator heating surfaces and a collector and/or distributor |
| CN104109830A (en) * | 2014-07-22 | 2014-10-22 | 桂林电子科技大学 | Surface hafnium-infiltrated austenitic stainless steel resistant to high temperature and preparation method thereof |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| PENG YAN等: "《Effect of microstructural evolution on high-temperature strength of 9Cr-3 W-3 Co martensitic heat resistant steel under different aging conditions》", 《MATERIALS SCIENCE&ENGINEERING A》 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886950A (en) * | 2016-06-01 | 2016-08-24 | 哈尔滨锅炉厂有限责任公司 | 700 DEG C reheater of advanced ultra supercritical unit boiler |
| CN106011686A (en) * | 2016-06-01 | 2016-10-12 | 哈尔滨锅炉厂有限责任公司 | Reheater of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051740A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Superheater of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106051729A (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨锅炉厂有限责任公司 | Header of 650 DEG C advanced ultra-supercritical unit boiler |
| CN106066035A (en) * | 2016-06-01 | 2016-11-02 | 哈尔滨锅炉厂有限责任公司 | Surpass the G115 header of 623 DEG C of advanced Boiler of Ultra-supercritical Units |
| CN106090875A (en) * | 2016-06-01 | 2016-11-09 | 哈尔滨锅炉厂有限责任公司 | The header of 650 DEG C of advanced Boiler of Ultra-supercritical Units |
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Application publication date: 20151118 |