Numerical simulation and optimization for combustion in a 600 MW unit swirl opposed boiler firing blended coals

OU Cong; MA Suxia; CUI Zhigang; MA Honghe; LI Jianrong

doi:10.19666/j.rlfd.201704009

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Numerical simulation and optimization for combustion in a 600 MW unit swirl opposed boiler firing blended coals

更新时间：2025-09-28

- Numerical simulation and optimization for combustion in a 600 MW unit swirl opposed boiler firing blended coals
- Thermal Power Generation Vol. 47, Issue 1, Pages: 86-93(2018)
- 作者机构：
  
  1. 太原理工大学电气与动力工程学院
  2. 国电电力大同发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201704009
  CLC： TM621.2
- Published：2018
- 稿件说明：
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OU Cong, MA Suxia, CUI Zhigang, et al. Numerical simulation and optimization for combustion in a 600 MW unit swirl opposed boiler firing blended coals[J]. Thermal power generation, 2018, 47(1): 86-93.
DOI：

OU Cong, MA Suxia, CUI Zhigang, et al. Numerical simulation and optimization for combustion in a 600 MW unit swirl opposed boiler firing blended coals[J]. Thermal power generation, 2018, 47(1): 86-93. DOI： 10.19666/j.rlfd.201704009.

摘要

针对某电厂一台600 MW机组旋流对冲燃烧锅炉燃用4种不同热值混煤

采用Fluent软件对该锅炉的燃烧特性进行研究

并在此基础上进行燃烧优化调整。模拟结果表明:混煤燃烧炉内速度场和温度场分布较为对称;总二次风风量不变时

内二次风比例过大或过小均会使NO_x排放质量浓度偏大;特定的内二次风比例下

存在最优的外二次风旋流角度

模拟显示30°为最优的外二次风旋流角度;随着燃用煤平均热值增大

NO_x排放质量浓度逐渐增大

平均热值超过25 122 kJ/kg的入炉煤不适宜在该炉燃用。本文的研究结果可为同类型前后墙对冲锅炉掺烧不同热值煤时的燃烧优化提供参考。

Abstract

The Fluent software was adopted to study the combustion characteristics of a 600 MW unit opposed boiler

which was fueled with three different blended coals. On this basis

the combustion optimization was carried out. The simulation results show that

the velocity and temperature field distribution is symmetric when the blended coal was burned. With the same secondary air flux

a too large or too small ratio of mass flow rate of inner secondary air to outer secondary air will increase the emission of NO_x. At a specific ratio of mass flow rate of inner secondary air to outer secondary air

there is an optimal outer secondary air vane angle(30°). The emission of NO_x increases with the average calorific value of the coal as fired. Once the average calorific value of the blended coal exceeds25 122 k J/kg

the coal is not suitable for this boiler. The results can provide some references for the combustion optimization and adjustment for the same type boilers firing different coal blends.

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Related Author

JIANG Jian-gang1

LI Yong-ling1

ZHANG Chun-fa21.Department of Power

LI Ming

OU Zongxian Yantai Longyuan Electric Power Technology Co Ltd

FAN Rongrong1

YAO Cuilan2

YANG Jusheng1

Related Institution

Power Department of Baoding Electric Power Vocational and Technical College

Department of Power Engineering, North China Electric Power University

Yantai Longyuan Electric Power Technology Co., Ltd

School of Electrical and Power Engineering, Taiyuan University of Technology

Shanxi Electric Power Vocational and Technical College

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