Influence of Steam on the Volatili-ation of SiO<sub>2</sub> and PM Formation Characteristics During Synthetic Char Combustion

doi:10.7652/xjtuxb202008005

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Influence of Steam on the Volatili-ation of SiO₂ and PM Formation Characteristics During Synthetic Char Combustion

更新时间：2025-07-09

- Influence of Steam on the Volatili-ation of SiO₂ and PM Formation Characteristics During Synthetic Char Combustion
- Vol. 54, Issue 8, Pages: 35-43(2020)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202008005
  CLC： TK16
- Online First：10 August 2020，
  
  Published：2020
- 稿件说明：
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Influence of Steam on the Volatili-ation of SiO₂ and PM Formation Characteristics During Synthetic Char Combustion[J]. 2020, 54(8): 35-43. DOI: 10.7652/xjtuxb202008005.
DOI：

Influence of Steam on the Volatili-ation of SiO₂ and PM Formation Characteristics During Synthetic Char Combustion[J]. 2020, 54(8): 35-43. DOI: 10.7652/xjtuxb202008005. DOI：

摘要

为了综合分析温度和水蒸气含量对煤焦燃烧过程中二氧化硅(SiO

)气化挥发以及超细模态颗粒物(PM)生成特性的影响

利用高温管式沉降炉在1 400、1 800 K的温度下模拟空气气氛(21% O

+79% N

)

并分别加入体积分数为0%、5%、10%、20%、30%的水蒸气

进行合成煤焦燃烧实验。利用荷电低压撞击器(ELPI+)测得合成焦燃烧产物中PM的数量及质量浓度

并通过数量气化因子和气化率对SiO

气化挥发特性进行定量分析。研究表明:在各个实验工况下

超细PM的数量浓度占PM

数量浓度的比例达到99%以上

质量浓度占PM

质量浓度的比例不足1%; 燃烧温度和水蒸气对SiO

气化的影响效果明显

在1 400 K燃烧温度下

超细PM的累计数量浓度随着水蒸气的加入先减小后增大

累计质量浓度随水蒸气的加入而减小; 在1 800 K燃烧温度下

超细PM累计数量浓度和累计质量浓度均随水蒸气体积分数的提高而递增

1 800 K、30% H

O时

合成焦中SiO

的数量气化因子和气化率均达到最大值

分别为7.95×10

/mg和0.95%。研究揭示了煤焦燃烧过程中超细PM生成及数量浓度与质量浓度的粒径分布关系

为高效降低燃煤过程中超细模态PM的排放量提供了理论依据。

Abstract

A combustion experiment of synthetic char is conducted in a high-temperature drop tube furnace at 1 400 K

1 800 K in the 21% O

+79% N

atmosphere with volume fractions of steam of 0%

10%

20% and 30%. The purpose is to comprehensively analy-e the influences of temperature and steam content on the gasification and volatili-ation characteristics of silica(SiO

)and the

formation characteristics of ultrafine particulate matter(PM)in the process of coal char combustion. The quantity and mass concentration of ultrafine PM in the combustion products of synthetic char are measured by ELPI+

and the gasification characteristics of SiO

are quantitatively analy-ed by using gasification factor and gasification rate. Results show that under various experimental conditions

the proportion of ultrafine PM in PM

is more than 99%

and the mass concentration of ultrafine PM accounts for less than 1% of that of PM

. Combustion te

关键词

Keywords

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Related Author

陈思翰 1

刘福兴 2

Related Institution

Graduate School of Engineering Technology, Lunghwa University of Science and Technology, Taoyuan

⁰

Influence of Steam on the Volatili-ation of SiO2 and PM Formation Characteristics During Synthetic Char Combustion

DOI：10.7652/xjtuxb202008005

摘要

Abstract

关键词

Keywords

references

Influence of Steam on the Volatili-ation of SiO₂ and PM Formation Characteristics During Synthetic Char Combustion