Analysis on energy saving potentials of overheat recovery of steam extractions for double-reheat power unit

LIU Ming; ZHAO Yongliang; WANG Chaoyang; YAN Junjie

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Analysis on energy saving potentials of overheat recovery of steam extractions for double-reheat power unit

Thermal Power Generation Issue 7, (2017)

更新时间：2025-09-28

- Analysis on energy saving potentials of overheat recovery of steam extractions for double-reheat power unit
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK114
- Published Online：02 August 2017，
  
  Published：2017
- 稿件说明：
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LIU Ming, ZHAO Yongliang, WANG Chaoyang, et al. Analysis on energy saving potentials of overheat recovery of steam extractions for double-reheat power unit[J]. Thermal Power Generation, 2017, (7).
DOI：

LIU Ming, ZHAO Yongliang, WANG Chaoyang, et al. Analysis on energy saving potentials of overheat recovery of steam extractions for double-reheat power unit[J]. Thermal Power Generation, 2017, (7). DOI：

摘要

再热对给水回热效果有削弱作用，二次再热机组的蒸汽过热度较大，造成的回热过程不可逆损失也更大。分析大过热度回热系统抽汽参数可知，这些过热能量可回收用于锅炉工质和送风加热过程，从而等效降低蒸汽循环吸热量，提高系统效率。为此，本文结合某660 MW二次再热机组，基于热平衡计算模型和.分析模型，对抽汽过热能量回收的节能潜力展开定量研究。结果表明：该机组第5级―第10级加热器抽汽过热度很大，达118~311 ℃，将这些加热器过热能量全部回收用于锅炉本体，节煤量可达3.59 g/(kW・h)；通过抽汽过热能量回收，可提高第5级―第10级加热器的.效率。此外，对过热能量回收系统进行了初步设计，为二次再热机组的系统构型优化提供依据。

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