O₂/CO₂气氛下生物质混煤燃烧特性数值模拟
马彦花¹，马英²，和婷¹，郭智群¹
（1. 云南农业大学机电工程学院，云南 昆明 650201；2. 新疆工程学院能源工程学院，新疆 乌鲁木齐 830000）
摘要： 为探究O₂/CO₂气氛下生物质与煤粉混燃对锅炉燃烧特性的影响，利用Fluent 软件模拟300 MW 煤粉炉内生物
质与煤粉混燃过程，分别研究了在空气气氛及O₂/CO₂气氛下，生物质燃料的掺烧及氧浓度对炉内温度场、速度场和组分
分布等的影响。结果表明：较之空气气氛，富氧气氛下燃料的着火及燃烬滞后，CO 生成量增加，燃烧区气体流速降低；
生物质燃料的加入可以改善燃料的燃烧特性，着火和燃烬提前，减少CO 的生成量。
关键词： 生物质；混燃；O₂/CO₂；模拟；温度场；速度场
中图分类号： TK227.1     文献标识码： A     文章编号： 2095-0802-(2021)06-0002-05
Numerical Simulation of Combustion Characteristics of Biomass Mixed Coal in
O₂/CO₂ Atmosphere
MA Yanhua¹, MA Ying², HE Ting¹, GUO Zhiqun¹
(1. Faculty of Mechanical & Electrical Engineering, Yunnan Agricultural University, Kunming 650201, Yunnan, China; 2. College
of Energy Engineering, Xinjiang Institute of Engineering, Urumqi 830000, Xinjiang, China)
Abstract: In order to study the influence of biomass and pulverized coal combustion on the combustion characteristics of boiler
in O₂/CO₂ atmosphere, this paper simulated the combustion process of biomass and pulverized coal in 300 MW pulverized coal
furnace by Fluent software, and studied the influence of the combustion of biomass fuel and oxygen concentration on the temperature
field in the furnace, velocity field and component distribution respectively in the air atmosphere and O₂/CO₂ atmosphere. The
results showed that, compared with air atmosphere, the ignition and burnout of fuel in oxygen enriched atmosphere lagged behind,
the CO production increased, and the gas velocity in combustion zone decreased; the addition of biomass fuel could improve the
combustion characteristics of the fuel, advanced the ignition and burnout, and reduced the production of CO.

Key words: biomass; mixed combustion; O₂/CO₂; simulation; temperature field; velocity field