煤矿安全2024，Vol.55Issue(5)：131-139,9.DOI:10.13347/j.cnki.mkaq.20231174
不同通风速率下水浸煤燃烧特性及氧化动力学研究
Study on combustion characteristics and oxidation kinetics of water-immersed coal under different ventilation rates
摘要
Abstract
The sudden air drying of coal samples during long-term immersion in water will increase the risk of coal spontaneous combustion,and then coal spontaneous combustion will occur.Ventilation rate is a key factor affecting coal spontaneous combus-tion,but its effect on spontaneous combustion of water-immersed coal is not clear.In order to investigate the effect of ventilation rate on the combustion characteristics of water-immersed coal,this paper first tested the cross-point temperature and CO and CO2 release patterns of coal samples during low-temperature oxidation using a programmed heating system,then tested the combustion character-istics of water-immersed coal using a simultaneous thermal analyzer,and finally tested the functional group content of water-im-mersed coal using infrared spectroscopy.The study showed that:the cross-point temperature of the coal sample was the lowest when the ventilation rate was 60 mL/min,but the release of CO and CO2 increased with the increase of ventilation rate;the optimal ventila-tion rate existed in the coal combustion process,when the activation energy of the coal was the smallest,and the coal burned more easily and released more heat;the higher the ventilation rate,the more oxygen-containing functional groups such as carbonyl and carboxyl groups were contained in the coal,which provided the coal oxidation sufficient energy source for coal oxidation.关键词
水浸煤/煤燃烧特性/自燃/通风速率/交叉点温度Key words
water-immersed coal/combustion characteristics of coal/spontaneous combustion/ventilation rate/cross point temperature分类
矿业与冶金引用本文复制引用
赵吉玉..不同通风速率下水浸煤燃烧特性及氧化动力学研究[J].煤矿安全,2024,55(5):131-139,9.基金项目
中煤科工集团重庆研究院有限公司重点研发资助项目(202227003) （202227003）
中国煤炭科工集团有限公司重点研发资助项目(2022-2-TD-ZD010) （2022-2-TD-ZD010）
