燃烧和反应

Application of Response Surface Methodology for Analysis of Reheat Steam Temperatures in a Double Reheat Coal-Fired Boiler 

  • ZHANG Jian ,
  • XU Wei ,
  • ZHANG Zhongxiao ,
  • FAN Haojie ,
  • WU Xiaojiang ,
  • DONG Jiancong
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  • 1. Institute of Thermal Energy Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China

网络出版日期: 2023-12-04

基金资助

Financial support for this work by the National Key Research and Development Program of China (Grant No.2017YFB0602102) is gratefully acknowledged.

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Application of Response Surface Methodology for Analysis of Reheat Steam Temperatures in a Double Reheat Coal-Fired Boiler 

  • ZHANG Jian ,
  • XU Wei ,
  • ZHANG Zhongxiao ,
  • FAN Haojie ,
  • WU Xiaojiang ,
  • DONG Jiancong
Expand
  • 1. Institute of Thermal Energy Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China

Online published: 2023-12-04

Supported by

Financial support for this work by the National Key Research and Development Program of China (Grant No.2017YFB0602102) is gratefully acknowledged.

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

为了提高二次再热燃煤机组在宽负荷运行时再热蒸汽品质和机组性能,本文结合多种调温方式来调节不同受热面之间的能量分配。基于基本的传热理论对受热面传热进行了热力学计算,分析了不同调温策略对蒸汽温度的影响。考虑到重叠受热面的特殊布置方式,本文使用分室模型来解决重叠受热面难以计算的问题。采用响应面法来分析各温度调节变量对蒸汽温度和锅炉效率的影响,拟合多项式模型,同时预测一次和二次再热蒸汽的温度。结果表明:烟气再循环率对再热汽温的影响比较显著,75%THA工况下工质温度的拟合值与计算值的最大温度偏差为3.85K,二次式模型能够较好地预测宽负荷范围内不同工况下的汽温。与烟气再循环和燃烧器摆角相比,烟气挡板的变化对锅炉效率有显著影响,烟气挡板对再热汽温影响最显著,烟气再循环次之,燃烧器摆角最弱。

本文引用格式

ZHANG Jian , XU Wei , ZHANG Zhongxiao , FAN Haojie , WU Xiaojiang , DONG Jiancong . Application of Response Surface Methodology for Analysis of Reheat Steam Temperatures in a Double Reheat Coal-Fired Boiler [J]. 热科学学报, 2022 , 31(6) : 2203 -2215 . DOI: 10.1007/s11630-022-1464-5

Abstract

For the improvement of reheat steam quality and performance of double reheat coal-fired utility boiler under wide load operation, a variety of temperature regulation ways were utilized to adjust the energy distribution between different heating surfaces. In this paper, thermodynamic calculation based on the fundamental heat transfer theory was conducted for the analysis of temperature regulation strategy effects to steam temperature. In consideration of the specific overlapping heating surface arrangement, the compartment model was adopted to solve this problem. Response surface methodology (RSM) was used to analysis the effect of each temperature regulating variables on the steam temperature and boiler efficiency; then the polynomial model was fitted to predict the primary and secondary steam temperature simultaneously. Results showed that the flue gas recirculation rate has a relatively significant influence on the steam temperature, the maximum temperature deviation between fitting value and calculation value is 3.85°C in 75%THA; the quadratic model can well predict the steam temperature under different operation conditions in wide load change. The variation of flue gas baffle has a significant influence on the boiler efficiency, compared to the flue gas recirculation and angle of burner oscillation. The influence of various factors on the reheat steam temperature is flue gas baffle > flue gas recirculation > angle of burner oscillation.

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