Experimental study on pollutants emission and ash formation characteristics during co-combustion of biomass and coal in fluidized bed

许慧; 张子皓; 赵瑞东; 陈天举; 武景丽; 方龙; 吴晋沪

doi:10.19666/j.rlfd.202503045

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Experimental study on pollutants emission and ash formation characteristics during co-combustion of biomass and coal in fluidized bed

Thermal Power Generation Vol. 54, Issue 8, Pages: 160-167(2025)

更新时间：2026-08-11

- Experimental study on pollutants emission and ash formation characteristics during co-combustion of biomass and coal in fluidized bed
- 作者机构：
  
  1. 青岛大学化工学院
  2. 中国科学院青岛生物能源与过程研究所
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202503045
  CLC： X701
- Published：2025
- 稿件说明：
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[1]许慧,张子皓,赵瑞东,等.生物质与煤流化床混烧过程污染物排放及成灰特性试验研究[J],2025,54(08):160-167.
[1]许慧,张子皓,赵瑞东,等.生物质与煤流化床混烧过程污染物排放及成灰特性试验研究[J],2025,54(08):160-167. DOI： 10.19666/j.rlfd.202503045.

DOI：10.19666/j.rlfd.202503045.

摘要

生物质与煤混烧可降低燃烧过程中的污染物和碳排放，但二者混烧过程中污染物排放和成灰特性及其关键影响因素仍缺乏系统的对比研究。采用小型流化床装置研究了稻壳(RH)和烟煤(SC)混烧特性，考察了燃烧温度、反应气氛和掺混比例等对混烧过程NO和SO

排放规律及成灰特性的影响。结果表明：随燃烧温度升高，混烧过程NO排放质量浓度先升高后降低，SO

排放质量浓度则逐渐升高，高温会促进灰中矿物发生相互作用，生成Na_2Al_2SiO

等物质，降低混烧灰熔点；贫氧气氛下提高O

体积分数会导致NO和SO

排放质量浓度升高，富氧气氛下随O

体积分数增大，NO排放质量浓度逐渐降低，而SO

排放质量浓度则先升高后降低，反应气氛对混烧灰主要组成和晶体结构的影响相对较小；添加RH能够有效降低混烧过程的NO和SO

排放，随RH掺混比例增大，灰中Ca_3Al_2O

易与SiO

等形成低熔点化合物，导致灰出现明显的熔融现象。

Abstract

Co-combustion of biomass and coal can significantly reduce the pollutants and carbon emissions. However

the pollutants emission

ash characteristics and their influence factors during co-combustion of coal and biomass are still obscure. A micro-fluidized bed reactor was used to investigate the co-combustion of rice husk(RH) and bituminous coal(SC). The effects of combustion temperature

atmosphere and blending ratio on the emission character

istics of NO

and ash were studied. The results indicated that

with the increase of temperature

the mass concentration of NO emissions during co-combustion rose at first and then fell

while the SO

emissions mass concentration gradually increased. High temperature would promote the interaction of minerals in the ash

generating Na_2Al_2SiO

and lowering the melting point of the co-combustion ash. In oxygen-deficient atmosphere

NO and SO

emission mass concentrations increased with the O

volume fraction. In oxygen-enriched atmosphere

the NO emission mass concentration gradually decreased as the O

volume fraction increased

while the SO

emission mass concentration increased at first and then decreased. The influence of reaction atmosphere on the main composition and crystal structure of the co-combustion ash was relatively minor. NO and SO

emissions during cocombustion can be effectively reduced due to the addition of RH. As the RH blending ratio was increased

Ca_3Al_2O

in ash tended to form low-melting-point compounds with SiO

leading to a noticeable melting phenomenon.

关键词

Keywords

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