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Collection box of 630-degree advanced ultra-supercritical boiler

A technology for ultra-supercritical boilers and headers, which is applied to components of steam boilers, boiler drums/box headers, steam boilers, etc. The steam oxidation performance cannot meet the use requirements and other problems, so as to achieve excellent steam oxidation resistance, reduce the wall thickness of the header, and reduce the safety effect

Inactive Publication Date: 2018-06-19
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high temperature of the pipe joints used in the boiler header of the 630°C advanced ultra-supercritical unit, the anti-steam oxidation performance of the G115 material cannot meet the use requirements, resulting in the use of the G115 header for the 630°C advanced ultra-supercritical unit boiler cannot guarantee the safe operation and reliability of the unit Therefore, there is an urgent need to provide a heat-resistant steel material for the advanced ultra-supercritical unit boiler header at 630 °C to meet the needs of safe use of 630 °C boilers and effectively reduce unit construction costs

Method used

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  • Collection box of 630-degree advanced ultra-supercritical boiler
  • Collection box of 630-degree advanced ultra-supercritical boiler
  • Collection box of 630-degree advanced ultra-supercritical boiler

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Experimental program
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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the header of a 630°C advanced ultra-supercritical boiler in this embodiment includes a header body 1 and a header pipe joint 2, and a set of header pipe joints are welded on the header body 1 2. One end of the header pipe joint 2 is welded to the high-temperature heating surface tube of the boiler. The high-temperature heating surface of the boiler is the boiler superheater and boiler reheater. The other end of the header pipe joint 2 and the header body 1 adopt a complete Penetrating fillet seam welding, the header body 1 is made of G115 large-diameter pipe, and the header pipe joint 2 is made of G115+GH984G small-diameter composite steel pipe.

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 Describe this embodiment, the header of a 630°C advanced ultra-supercritical boiler in this embodiment, in the G115 large-diameter tube alloy composition used in the header body 1, the Cr content is 8.0% to 10.0%, and the W content is 2.0%. ~4.0%, the Co content is 2.0%~3.5%, and the G115 metallographic structure of the material is tempered martensite.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination figure 1 Describe this embodiment, the header of a 630°C advanced ultra-supercritical boiler in this embodiment, in the G115 large-diameter tube alloy composition used in the header body 1, the Cr content is 8.0%, and the W content is 2.0% , the Co content is 2.0%, and the G115 metallographic structure of the material is tempered martensite.

[0024] Specific implementation mode four: combination figure 1 Description of this embodiment, the header of a 630°C advanced ultra-supercritical boiler in this embodiment, in the G115 large-diameter tube alloy composition used in the header body 1, the Cr content is 10.0%, the W content is 4.0%, and the Co content 3.5%, the G115 metallographic structure of the material is tempered martensite.

[0025] Specific implementation mode five: combination figure 1 Description of this embodiment, the header of a 630°C advanced ultra-supercritical boiler in this embodiment, in the G115 lar...

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Abstract

The invention discloses a collection box of a 630-degree advanced ultra-supercritical boiler, and belongs to the boilers. The collection box comprises a collection box body and a set of collection boxpipe connectors which are welded to the collection box body. One end of the collection box pipe connectors is welded to the high-temperature heated face of the boiler, the high-temperature heated face of the boiler is provided with a boiler superheater and a boiler reheater, the other end of the collection box pipe connectors is welded to the collection box body through a full penetration weldingtype fillet weld, the collection box body is manufactured from a G115 large-diameter pipe, and G115+GH984G small-diameter composite steel pipes are adopted as the collection box pipe connectors. Thesafety of the collection box of the 630-degree advanced ultra-supercritical boiler is ensured, the manufacturing difficulty of the collection box is lowered, meanwhile, the manufacturing cost of the 630-degree advanced ultra-supercritical boiler is reduced, the G115+GH984G small-diameter composite steel pipes are adopted as the collection box pipe connectors, and it is ensured that the pipe connectors till have excellent steam oxidation resistance even after the inner wall steam temperature exceeds 650 DEG C.

Description

technical field [0001] The invention relates to a header of an ultra-supercritical boiler made of high-strength material, which belongs to the technical field of boilers. Background technique [0002] At present, the boiler with the highest pressure, highest temperature and highest efficiency in the world has a steam temperature of 605 / 623 / 623°C and a coal consumption of 256.16 grams per kWh for power generation. High temperature and greater pressure, especially the steam oxidation resistance of boiler headers and pipe joints, put forward higher requirements. [0003] Due to the high temperature of the pipe joints used in the boiler header of the 630°C advanced ultra-supercritical unit, the anti-steam oxidation performance of the G115 material cannot meet the use requirements, resulting in the use of the G115 header for the 630°C advanced ultra-supercritical unit boiler cannot guarantee the safe operation and reliability of the unit Therefore, it is urgent to provide a heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/22C22C38/22C22C38/30C22C30/00
CPCF22B37/228C21D2211/001C21D2211/008C22C30/00C22C38/22C22C38/30
Inventor 梁宝琦杨权吴永春谭舒平魏力民殷亚宁黄莺姜小哲
Owner HARBIN BOILER
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