Header of ultra supercritical unit boiler in above 620 DEG C

A technology of ultra-supercritical units and headers, which is applied in the direction of boiler drums/box headers, etc., and can solve problems such as failure to meet boiler automatic adjustment performance requirements and low operational reliability

Inactive Publication Date: 2015-10-28
SHANGHAI BOILER WORKS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultra-supercritical unit with steam parameters exceeding 620°C can improve the thermal efficiency of the unit. However, the existing boiler outlet header cannot meet the peak-shaving perfor

Method used

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  • Header of ultra supercritical unit boiler in above 620 DEG C
  • Header of ultra supercritical unit boiler in above 620 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 type of superheater or reheater outlet header applied to super-supercritical unit boiler superheater or reheater with steam parameters exceeding 620°C. The material uses Fe-Ni-Cr aging-strengthened iron-nickel-based superalloy large-diameter tube and small caliber tube. 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 Fe-Ni-Cr aging-strengthened iron-nickel-based superalloy large-diameter tube; the header base 2 is made of Fe -Ni-Cr aging-strengthened iron-nickel-based superalloy small-diameter tube; final stage superheater or final reheater tube 3, the material is high-temperature-resistant austenitic stainless steel small-diameter tube, and the component size is calculated according to the design para...

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Abstract

The invention relates to a header of an ultra supercritical unit boiler in above 620 DEG C. The 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 finishing superheater or a finish-stage reheater. The header is characterized in that the header body is manufactured by a Fe-Ni-Cr ageing strengthening type Fe-Ni matrix high-temperature alloy large-diameter tube, and the tube base is manufactured by a Fe-Ni-Cr ageing strengthening type Fe-Ni matrix high-temperature alloy small-diameter tube. The invention provides the superheater or reheater outlet header applied in steam parameter ultra supercritical unit boiler in above 620 DEG C, and the material is the Fe-Ni-Cr ageing strengthening type Fe-Ni matrix high-temperature alloy large-diameter tube. The material is excellent in high-temperature oxidizability, and has excellent practical value.

Description

technical field [0001] The invention relates to an outlet header applied to the final-stage superheater or final-stage reheater of a boiler of an ultra-supercritical unit with an ultra-620°C temperature. 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, ultra-supercritical units with steam parameters excee...

Claims

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Application Information

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IPC IPC(8): F22B37/22
Inventor 田志豪王煜王建泳王崇斌金用强佟辉朱更秦升
Owner SHANGHAI BOILER WORKS
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