The analysis of heat-resistant steel selection for coal-fired supercritical carbon dioxide boiler

XING Gang; ZHENG Haonan; XU Jinliang; SUN Enhui; QIAO Jiafei; WANG Bingbing; HU Rui

doi:10.19666/j.rlfd.202209239

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The analysis of heat-resistant steel selection for coal-fired supercritical carbon dioxide boiler

更新时间：2025-09-28

- The analysis of heat-resistant steel selection for coal-fired supercritical carbon dioxide boiler
- Thermal Power Generation Vol. 52, Issue 6, Pages: 157-164(2023)
- 作者机构：
  
  1. 国电电力发展股份有限公司
  2. 华北电力大学低品位能源多相流与传热北京市重点实验室
  3. 国家能源集团新能源技术研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202209239
  CLC： TM621.2;TG142.73
- Published：2023
- 稿件说明：
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XING Gang, ZHENG Haonan, XU Jinliang, et al. The analysis of heat-resistant steel selection for coal-fired supercritical carbon dioxide boiler[J]. Thermal power generation, 2023, 52(6): 157-164.
DOI：

XING Gang, ZHENG Haonan, XU Jinliang, et al. The analysis of heat-resistant steel selection for coal-fired supercritical carbon dioxide boiler[J]. Thermal power generation, 2023, 52(6): 157-164. DOI： 10.19666/j.rlfd.202209239.

摘要

采用超临界二氧化碳（S-CO_2）循环时，炉膛管内工质温度较高，耐热钢钢材等级需提升。S-CO_2管内工质温度与壁温相差较大，远高于水蒸气锅炉30～50℃的温差范围。工程应用的水蒸气锅炉受热面选材的要求与依据，无法直接用于S-CO_2锅炉。在材料边界条件下，从材料的高温强度和腐蚀特性出发，综合成熟耐热材料的使用情况和经济性能，探讨将T23、T91、T92、TP347HFG、Super304H等耐热钢应用于S-CO_2锅炉的可行性，得到SCO_2锅炉的选材特点。研究结果表明：在一定管结构条件下，T91可用于冷却壁选材，传统水蒸气锅炉水冷壁管材，如12Cr1MoVG、T21和T23等铁素体耐热钢将无法使用；对于过热器，只有热强性更好的奥氏体钢TP347HFG与Super304H在一定管结构参数条件下才符合受热面选材要求。

Abstract

To ensure the safe and reliable operation of supercritical carbon dioxide (S-CO_2) power plant over a long period of time

referred to the material commonly used in traditional steam boiler

the material of S-CO_2 boiler is selected fromhigh temperature strength and corrosion characteristics. When CO_2 flows through the boiler

the temperature of CO_2 is high

the temperature difference between CO_2 and tube wall temperature is large

over the 30～50 ℃ of steam boiler. Then the grade of the heat-resistant steel has to be upgraded. However

requirements and methods for the material selection for steam boiler cannot be directly used for S-CO_2 boiler. The feasibility of heat-resistant steels such as T23

T91

T92

TP347HFG and Super304H used in S-CO_2 boilers is explored from using maturity and economic performance. The results show that for cooling wall

T91 could be selected at certain tube structure

but 12Cr1MoVG

T21 and T23 et al used in steam boiler could not be selected. For superheater

only austenitic steel TP347HFG and Super304H meet the material selection requirements at certain tube structure.

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