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Header of ultra supercritical boiler unit at 700 DEG C

An ultra-supercritical unit and header technology, which is used in the components of steam boilers, boiler drum/box headers, steam boilers, etc. question

Inactive Publication Date: 2015-11-18
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 700°C steam parameter ultra-supercritical unit can improve the thermal efficiency of the unit, but the existing boiler outlet header cannot meet the peak-shaving performance of the 700°C steam boiler and the automatic adjustment performance requirements of the boiler to adapt to the load change of the unit, and the operation reliability is not high.

Method used

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  • Header of ultra supercritical boiler unit at 700 DEG C
  • Header of ultra supercritical boiler unit at 700 DEG C

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Embodiment Construction

[0012] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0013] The invention provides a new superheater outlet header or reheater outlet header for ultra-supercritical units with steam parameters of 700°C. The material is Ni-Cr-Co-Mo-B iron-nickel-based superalloy large-diameter tube and small bore tubing. Such as figure 1 As shown, including the outlet header of the final superheater or the outlet header 1 of the final reheater, the material is Ni-Cr-Co-Mo-B nickel-based superalloy large-diameter tube; the header pipe seat 2, the material is Ni -Cr-Co-Mo-B nickel-based superalloy small-diameter pipe; Cr-Ni-W-Cu high-temperature-resistant austenitic stainless steel small-diameter steel pipe 3, the component size is calculated according to the design parameters.

[0014] One end of the header socket 2 of the outlet header of the final superheater or outlet header 1 of the final reheat...

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Abstract

The invention relates to a header of an ultra supercritical boiler unit at 700 DEG C. The header comprises a header body and a tube base, wherein one end of the tube base and the header body are welded together; the other end of the tube base and a finishing super-heater or a finishing super-heater tube are welded together; the header is characterized in that the header body is made from a Ni-Cr-Co-Mo-B nickel-based high-temperature alloy large-diameter tube; the tube base is made from a Ni-Cr-Co-Mo-B nickel-based high-temperature alloy small-diameter tube. The invention provides a novel super-heater outlet header or a reheater outlet header applied to an ultra supercritical unit of which the steam parameter is 700 DEG C, and the header is made from the Ni-Cr-Co-Mo-B nickel-based high-temperature alloy large-diameter tube. The material is excellent in high-temperature oxidation property and excellent in practical value.

Description

technical field [0001] The invention relates to an outlet header applied to a boiler superheater or reheater of a 700°C ultra-supercritical unit. Background technique [0002] With the rapid development of the national economy, energy shortages and environmental degradation are becoming more and more serious, especially the smog that has swept the central and eastern regions in recent years has attracted great attention at home and abroad. Among the air-polluting emissions, the emissions of pollutants (mainly carbon dioxide) from coal-fired power stations account for an important part of the total emissions. main strategic goals. It has been proved that improving the steam parameters of the generator set and improving the power generation efficiency is an important way to reduce coal consumption and reduce pollutant emissions. [0003] Under the above background, the 700°C steam parameter ultra-supercritical unit came into being. The 700°C steam parameter ultra-supercriti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/04F22B37/22
Inventor 卢小莉王炯祥王煜王崇斌金用强王建泳田志豪徐若雨
Owner SHANGHAI BOILER WORKS
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