660MW燃煤机组考虑调峰下空预器热-流-固耦合计算模型优化研究

李亚君; 穆塔里夫·阿赫迈德; 木巴来克·都尕买提

doi:10.13568/j.cnki.651094.651316.2025.06.21.0001

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660MW燃煤机组考虑调峰下空预器热-流-固耦合计算模型优化研究

智慧工程与先进制造专题 | 更新时间：2026-01-21

- 660MW燃煤机组考虑调峰下空预器热-流-固耦合计算模型优化研究
- 660MW燃煤机组考虑调峰下空预器热-流-固耦合计算模型优化研究
- 新疆大学学报（自然科学版中英文） 2025年42卷第6期页码：723-734
- 作者机构：
  
  新疆大学电气工程学院
- 作者简介：
- 基金信息：
  
  新疆维吾尔自治区高校基本科研业务费科研项目-培育类项目“富氧燃烧锅炉回转式烟气预热器热力特性及漏风研究”（XJEDU2024P024）;新疆维吾尔自治区“天山英才”计划-科技创新领军人才基金资助项目“新疆碳中和能源科学与技术研究”（2022TSYCLJ0001）;新疆维吾尔自治区“天山英才”计划“CO2咸水层封存岩心润湿性演化与渗流特性研究”（2023TSYC QNTJ0035）
- DOI：10.13568/j.cnki.651094.651316.2025.06.21.0001
  中图分类号： TM621
- 纸质出版：2025
- 稿件说明：
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[1]李亚君,穆塔里夫·阿赫迈德,木巴来克·都尕买提.660 MW燃煤机组考虑调峰下空预器热-流-固耦合计算模型优化研究[J].新疆大学学报(自然科学版中英文),2025,42(06):723-734.
[1]李亚君,穆塔里夫·阿赫迈德,木巴来克·都尕买提.660 MW燃煤机组考虑调峰下空预器热-流-固耦合计算模型优化研究[J].新疆大学学报(自然科学版中英文),2025,42(06):723-734. DOI： 10.13568/j.cnki.651094.651316.2025.06.21.0001.

DOI：10.13568/j.cnki.651094.651316.2025.06.21.0001.

摘要

回转式空预器在锅炉烟气余热回收中具有重要作用，但其效率易受空气泄漏的影响，尤其在深度调峰时，转子热变形引发的径向漏风问题尤为突出．为此，本文提出了一种热-流-固耦合计算模型，考虑转子“蘑菇状”热变形特征，精确模拟转子热变形引起的漏风行为，分析了转子热变形对密封间隙和漏风量的影响．计算结果显示，在最大连续蒸发量（BMCR）工况下热端漏风量占总漏风量的78.75%，当预留间隙增大至25 mm时，漏风量最大可达39.8 kg/s，漏风率每增加1%，每年额外消耗2 102.9吨标准煤，模型预测结果与电厂实际数据吻合．研究表明，将热变形影响引入空预器漏风分析中，可以显著提高模型对不同单元间隙下漏风分布的预测精度．本研究为回转式空预器密封系统的优化设计提供了理论支持，提出的方案为提高运行效率和节能降耗提供了切实可行的路径．

Abstract

The rotary air preheater plays a crucial role in recovering waste heat from the boiler

but its efficiency is significantly affected by air leakage

especially during deep peak-shaving operation

where rotor thermal deformation leads to prominent radial air leakage issues. To address this

a thermo-fiuid-solid coupled computational model is proposed

which incorporates the rotor's “mushroom-shaped” thermal deformation characteristics to accurately simulate the leakage behavior induced by thermal deformation. The study primarily analyzes the impact of rotor thermal deformation on the sealing gap and leakage rate. Under boiler maximum continuous rating(BMCR)conditions

the model results show that hot-end leakage accounts for 78.75% of the total leakage. When the reserved clearance is increased to 25 mm

the leakage rate can reach up to 39.8 kg/s. For every 1% increase in leakage rate

an additional 2 102.9 tons of standard coal are consumed annually

and the model's prediction results are consistent with the actual data of the power plant. The study demonstrates that incorporating thermal deformation effects into the analysis of air leakage significantly improves the model's predictive accuracy for leakage distribution under different unit clearances. This research provides theoretical support for optimizing the sealing system design of the rotary air preheater and offers practical solutions for enhancing operational efficiency and reducing energy consumption.

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references

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