煤质技术2026，Vol.41Issue(3)：79-86,8.DOI:10.3969/j.issn.1007-7677.2026.03.09
松木片有氧烘焙反应机理与物料、能量平衡研究
Study on the mechanism of aerobic roasting of pine chips and material and energy balances
摘要
Abstract
Using typical forestry waste pine wood chips as raw material,an industrial aerobic roasting experiment was carried out on a self-built 200 kg/h double-drum rotary wall-type roasting test device.The reaction mechanism,ma-terial,and energy balance characteristics under two typical operating conditions were studied and analyzed.The re-sults showed that temperature and residence time are key parameters affecting the roasting depth and product distribu-tion.Under the conditions of test Ⅰ,with a reaction zone temperature of 260-280℃and a residence time of 8 mi-nutes,deep roasting was achieved,with a solid yield of 64%.The obtained biochar was dark black,and the energy density increased by about 19%.In test Ⅱ,due to insufficient temperature(＜220℃)and shorter residence time(7 minutes),the reaction was mainly dehydration and slight pyrolysis;oxidation was weak,and the solid yield was 78%,with limited improvement in biochar quality.Based on the quantitative analysis of the gas-phase product com-position and oxygen consumption,the generation mechanism of CO2 was briefly analyzed.In the deep-roasting test Ⅰ,the contributions of decarboxylation and oxidation reactions to CO2 generation were 75.3%and 24.7%,respectively,indicating that even in the presence of oxygen,pyrolytic decarboxylation remains the main pathway for CO2 produc-tion.In the shallow-roasting test Ⅱ,the decarboxylation contribution was as high as 96.5%,with weak oxidation,and it was speculated that the water-gas shift reaction affected the gas composition under low-temperature catalytic conditions,leading to a high H2/CO ratio.The system energy efficiency of test Ⅰ was 77%,and the energy yield reached 76%,indicating that most of the biomass energy is effectively retained in the solid product.Energy losses mainly came from system heat loss(23%)and chemical energy in the gaseous products(11%).The heat released accounted for about 2%of the total input chemical energy,equivalent to replacing about 13%of external dimethyl e-ther fuel,demonstrating the potential of aerobic roasting to reduce external energy consumption.This study provides a theoretical basis and data support for further process optimization and industrial application of aerobic roasting.关键词
松木片/有氧烘焙/反应机理/能量平衡/生物炭Key words
pine chips/oxidative torrefaction/reaction pathways/energy efficiency/biochar分类
能源科技引用本文复制引用
李婷,程晓磊,王学文,苏鑫,王实朴..松木片有氧烘焙反应机理与物料、能量平衡研究[J].煤质技术,2026,41(3):79-86,8.基金项目
北京天地融创科技股份有限公司科技发展基金资助项目(2024RCJS-04、2025RCCC-01) （2024RCJS-04、2025RCCC-01）
