Numerical optimization design for low NO<sub>x</sub> combustion system of a Foster-Wheeler type down fired boiler

LI Hongzhi; YAN Wanjun; ZHAO Zhiping; ZHOU Hongguang; XU Dangqi; FANG Fan; NIE Jianping

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Numerical optimization design for low NO_x combustion system of a Foster-Wheeler type down fired boiler

Thermal Power Generation Vol. 43, Issue 12, Pages: 31-37(2014)

更新时间：2025-09-28

- Numerical optimization design for low NO_x combustion system of a Foster-Wheeler type down fired boiler
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.2
- Published：2014
- 稿件说明：
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LI Hongzhi, YAN Wanjun, ZHAO Zhiping, et al. Numerical optimization design for low NO_x combustion system of a Foster-Wheeler type down fired boiler[J]. Thermal Power Generation, 2014, 43(12): 31-37.
DOI：

LI Hongzhi, YAN Wanjun, ZHAO Zhiping, et al. Numerical optimization design for low NO_x combustion system of a Foster-Wheeler type down fired boiler[J]. Thermal Power Generation, 2014, 43(12): 31-37. DOI：

摘要

针对FW型W火焰锅炉燃尽性差、飞灰含碳量高、NOx排放浓度高等问题

提出了高效低氮燃烧系统改造方案

并以某FW型W火焰锅炉为模型进行了数值模拟计算

对比分析了低氮燃烧系统改造前后炉膛空气动力场、温度场、煤粉颗粒轨迹及NOx分布特点。结果表明

改造后NOx排放浓度由1 158.9mg/m3降至793.4mg/m3

炉膛出口烟气温度由1 126℃降至1 075℃

炉膛温度分布均匀

减温水流量和蒸汽温度偏差减小

提高了锅炉燃烧的稳定性和安全性。

Abstract

To solve such problems as poor burnout characteristics

high fly ash content and high NOxemission concentration occurred in FW type down fired boilers

a high efficient transformation scheme for low NOxcombustion system was proposed.Moreover

an FW type W-shaped flame boiler was taken as the model to carry out the simulation.The aerodynamic field

temperature field

coal particles trajectory and NOxconcentration distribution before and after the low NOx optimization retrofitting were comparatively analyzed.The results show that

after the transformation

the NOxemission decreased from 1 158.9mg/m3 to 793.4mg/m3

the furnace outlet gas temperature dropped from 1 126 ℃ to 1 075 ℃

the temperature field in furnace had good uniformity and the deviation of the desuperheating water quantity and the steam temperature reduced

which enhanced the stability and safety of the combustion.

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Related Institution

School of Energy Science and Engineering, Harbin Institute of Technology

Faculty of Maritime and Transportation,Ningbo University

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School of Electric Power, North China University of Water Resources and Electric Power

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Numerical optimization design for low NOx combustion system of a Foster-Wheeler type down fired boiler

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Numerical optimization design for low NO_x combustion system of a Foster-Wheeler type down fired boiler