Numerical simulation on biomass gas re-burning in a 660 MW coal-fired boiler

ZHANG Xiaotao; DUAN Foyuan; HUANG Yong; WANG Aijun

doi:10.19666/j.rlfd.201911175

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Numerical simulation on biomass gas re-burning in a 660 MW coal-fired boiler

Thermal Power Generation Vol. 49, Issue 3, Pages: 38-44(2020)

更新时间：2025-09-28

- Numerical simulation on biomass gas re-burning in a 660 MW coal-fired boiler
- 作者机构：
  
  华北水利水电大学电力学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201911175
  CLC： TK16
- Published Online：26 February 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Xiaotao, DUAN Foyuan, HUANG Yong, et al. Numerical simulation on biomass gas re-burning in a 660 MW coal-fired boiler[J]. Thermal Power Generation, 2020, 49(3): 38-44.
DOI：

ZHANG Xiaotao, DUAN Foyuan, HUANG Yong, et al. Numerical simulation on biomass gas re-burning in a 660 MW coal-fired boiler[J]. Thermal Power Generation, 2020, 49(3): 38-44. DOI： 10.19666/j.rlfd.201911175.

摘要

为了研究不同高度生物质气再燃喷口对锅炉燃烧过程等的影响

基于Fluent软件

搭建燃煤耦合生物质气模型

对某公司660 MW机组煤粉炉耦合生物质气再燃过程进行了数值模拟

研究生物质气喷口位置对锅炉温度场、NO_x的排放量和烟气中各组分变化的影响。结果表明:燃煤锅炉耦合生物质气再燃会导致炉膛烟气出口温度升高

并且随着生物质气喷口高度的增加而增加;生物质气再燃能降低NO_x的排放量

生物质气喷口位于再燃区上部、中部、下部时NO_x排放的平均质量浓度分别为228.32、210.19、239.58 mg/m~3

其中生物质气喷口位于再燃区中部的效果最好

与原始工况NO_x排放平均质量浓度291.96 mg/m3相比

下降了28.01%;生物质气再燃增加了烟气中CO的体积分数

并且随着生物质气喷口位置的增高而增加。

Abstract

In order to investigate the effects of re-burning nozzles of biomass gas at different heights on the combustion process of boiler

numerical simulation was carried out for re-burning process of a 660 MW coal-fired coupled biomass gas boiler

on the basis of establishing a model for the boiler using Fluent software. The effects of nozzle location of biomass gas on boiler temperature field

NO_x emissions and flue gas components were studied. The results show that

the biomass gas re-burning in coal-fired boiler will result in higher temperature at the furnace outlet

and the outlet temperature increases with the biomass gas nozzle height. The biomass gas re-burning can reduce the NO_x emissions

when the biomass gas nozzle is located in the upper

middle and lower parts of the reburning zone

the average mass concentration of NO_x emission is 228.32

210.19 mg/m3

239.58 mg/m3

respectively. When the biomass gas nozzle locates in the middle of the re-burning zone

it has the best NO_x reduction effect

which is 28.01% lower than the average mass concentration of NO_x emission(291.96 mg/m~3) under the original working condition. However

the biomass gas re-reburning increases the CO volume fraction

and the CO volume fraction increases with the biomass gas nozzle location height.

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