水热预处理对樟木屑制备成型燃料行为的影响

doi:10.3969/j.issn.0253-2417.2017.04.019

林产化学与工业 ›› 2017, Vol. 37 ›› Issue (4): 129-136.doi: 10.3969/j.issn.0253-2417.2017.04.019

水热预处理对樟木屑制备成型燃料行为的影响

李士伟^1,2,3, 杨静翎⁴, 李辉¹, 谭梦娇^1,5, 黄忠良¹, 李昌珠¹

1. 湖南省林业科学院, 湖南长沙 410004;
2. 南华大学化学化工学院, 湖南衡阳 421001;
3. 扶绥县环境保护局, 广西崇左 532199;
4. 湖南省环境保护科学研究院, 湖南长沙 410014;
5. 湖南农业大学资源环境学院, 湖南长沙 410128

收稿日期:2017-01-03 出版日期:2017-08-25 发布日期:2017-09-02
通讯作者: 李辉(1983-),男,副研究员,博士,长期从事固体废物资源化技术研究;E-mail:lihuiluoyang@163.com E-mail:lihuiluoyang@163.com
作者简介:李士伟(1987-),男,河南驻马店人,硕士,从事固体废弃物质源化研究
基金资助:
湖南省科技计划项目社会发展领域技术创新项目（2016SK2045）；长沙市科技计划项目（kq1606025）；湖北省技术创新专项重大项目（2016ACA176）

Effect of Hydrothermal Pretreatment on Pelletization of Cinnamomum camphora (L.) Presl

LI Shiwei^1,2,3, YANG Jingling⁴, LI Hui¹, TAN Mengjiao^1,5, HUANG Zhongliang¹, LI Changzhu¹

1. Hunan Academy of Forestry, Changsha 410004, China;
2. Department of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;
3. Environmental Protection Bureau of Fusui County, Chongzuo 532199, China;
4. Hunan Research Academy of Environmental Sciences, Changsha 410014, China;
5. College of Resource and Environment, Hunan Agricultural University, Changsha 410128, China

Received:2017-01-03 Online:2017-08-25 Published:2017-09-02

摘要/Abstract

摘要： 针对成型燃料制备过程中存在的产品质量不佳问题，在200~260℃对樟木（Cinnamomum camphora（L.） Presl）屑进行水热预处理，并制备成型燃料，考察水热预处理条件对成型能耗和成型燃料品质的影响。结果表明：水热预处理提高了小粒径微粒的含量和成型燃料的梅耶（Meyer）强度，降低了樟木屑的塑性但提高了成型中的挤压能耗和推动能耗。水热预处理显著促进樟木屑中半纤维素的降解，降低了吸水性和挥发分含量，并提高了成型燃料的着火温度和燃烬温度，降低了最大燃烧速率，将综合燃烧特性指数由6.96 mg²/（min²·℃³）降低至1.89~3.44 mg²/（min²·℃³），使成型燃料具有燃烧稳定和使用安全的优点。

关键词: 木屑, 水热预处理, 成型燃料, 强度, 综合燃烧特性指数

Abstract: In the present work, the effect of hydrothermal preatment on pelletization energy consumption and pellets' properties was carried out. The woody sawdust (Cinnamomum camphora (L.)Presl) was pretreated by hydrothermal pretreatment in the temperature range of 200-260℃, and then compressed into woody pellets, in order to solve the current problem of low quality of pellet properties in woody pellet industry. It was shown that the content of fines and the pellets' Meyer hardness were increased after the hydrothermal preatment. However, the plasticity of sawdust was reduced during hydrothermal pretreatment, resulting in the increase of compaction and extrusion energy consumption during pelletization. The decomposition of hemicellulose was improved during hydrothermal pretreatment, decreasing the moisture absorption and volatile content of pellets. The ignition temperature and burnout temperature of pellets were enhanced after hydrothermal preatment, which decreased the maximum buring rate, resulting in the increment of Composite combustion characteristic index from 6.96 mg²/(min²·℃³)to 1.89-3.44 mg²/(min²·℃³). Therefore, the hydrothermal preatment of Cinnamomum camphora (L.) Presl could improve the burning stablity and safty of pellets.

Key words: sawdust, hydrothermal pretreatment, pellet, hardness, composite combustion characteristic index

中图分类号:

TQ35
X712

李士伟, 杨静翎, 李辉, 谭梦娇, 黄忠良, 李昌珠. 水热预处理对樟木屑制备成型燃料行为的影响[J]. 林产化学与工业, 2017, 37(4): 129-136.

LI Shiwei, YANG Jingling, LI Hui, TAN Mengjiao, HUANG Zhongliang, LI Changzhu. Effect of Hydrothermal Pretreatment on Pelletization of Cinnamomum camphora (L.) Presl[J]. Chemistry and Industry of Forest Products, 2017, 37(4): 129-136.

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水热预处理对樟木屑制备成型燃料行为的影响

Effect of Hydrothermal Pretreatment on Pelletization of Cinnamomum camphora (L.) Presl

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