稻壳与稻秆灼烧灰颗粒的微观形态特征及其能谱分析

应用扫描电镜（scanning electron microscopy,SEM）和能谱（energy disperse X-ray microanalysis,EDX）结合联用技术对稻壳和稻秆在600和815℃下灼烧产生的灰渣的微观形态特征及其元素组成进行了全面地研究,并考察了不同灰化温度对生物质灰的粒度分布、微观形态、颗粒表面、内部结构及元素组成等方面产生的影响。结果表明：灰化温度升高,灰粒的粒度减小,且分布较均匀,稻壳灰中多为团状颗粒,而稻秆灰以棒状颗粒居多;对于600℃稻壳灰,部分灰粒仍保留着稻壳的原始纤维结构,且灰中存在许多松散状的密实小颗粒,但并未出现粘结团聚,而600℃稻秆灰表面存...

Full description

Saved in:
Bibliographic Details
Published in农业工程学报 Vol. 31; no. 19; pp. 208 - 215
Main Author 姚锡文 许开立
Format Journal Article
LanguageChinese
Published 东北大学资源与土木工程学院,沈阳,110819 2015
Subjects
扫描电子显微镜
生物质灰
碱金属
秸秆
稻壳
能谱分析
scanning electron microscopy
秸秆
energy disperse X-ray microanalysis
biomass ash
能谱分析
稻壳
alkali metals
rice husk
碱金属
扫描电子显微镜
straw
生物质灰
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2015.19.029

Cover

More Information
Summary:应用扫描电镜（scanning electron microscopy,SEM）和能谱（energy disperse X-ray microanalysis,EDX）结合联用技术对稻壳和稻秆在600和815℃下灼烧产生的灰渣的微观形态特征及其元素组成进行了全面地研究,并考察了不同灰化温度对生物质灰的粒度分布、微观形态、颗粒表面、内部结构及元素组成等方面产生的影响。结果表明：灰化温度升高,灰粒的粒度减小,且分布较均匀,稻壳灰中多为团状颗粒,而稻秆灰以棒状颗粒居多;对于600℃稻壳灰,部分灰粒仍保留着稻壳的原始纤维结构,且灰中存在许多松散状的密实小颗粒,但并未出现粘结团聚,而600℃稻秆灰表面存在大量粘连着小颗粒的絮状物,表明此时灰中已经出现低熔点成分熔融而产生的弱粘结;815℃时2种生物质灰粒表面都出现熔融态的碱金属物质和以玻璃体突起形式存在的石英结构,而且都存在明显的团聚结渣现象;稻壳灰与稻秆灰的主要组成元素是C、O、Si、K和Ca,较少的Mg、Al、Fe、P等也被检出,而S只在稻秆灰中检出,稻壳灰中未检出S元素;灰化温度升高,稻壳灰的K含量明显下降,而稻秆灰中K、Na、Ca的含量变化较小,但是Cl、Fe、Al的含量均明显下降;稻秆灰的K、Na、Ca和Cl含量都远高于稻壳灰,稻秆灰比稻壳灰更易造成设备腐蚀、结渣等危害。
Bibliography:straw; alkali metals; scanning electron microscopy; biomass ash; energy disperse X-ray microanalysis; rice husk
11-2047/S
Yao Xiwen, Xu Kaili （School of Resources ＆ Civil Engineering, Northeastern University, Shenyang 110819, China）
In the past decades, sustainable development and increasing fuel demand have necessitated the identification of possible energy sources. The utilization of biomass will reach up to 50 million tons in China after ten years. Nowadays, many countries are putting great emphasis on the exploration of biomass energy. The techniques used are various such as combustion, gasification, pyrolysis, hydrogen production. The use of the biomass as fuel generates a large amount of residual ash which causes serious environmental problems, as the biomass ash is easy to melt and volatilize. During the thermo-chemical conversion process, the residual inorganic materials also form the slag inside the boiler and the fly ash deposits on the tail heating surface, which retards heat transfer, deteriorates bu
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2015.19.029