西安科技大学学报2025，Vol.45Issue(3)：491-499,9.DOI:10.13800/j.cnki.xakjdxxb.2025.0307
低阶煤热解半焦氧化过程气体产生规律
Gas generation law during oxidation of pyrolysis semi-coke of low-grade coal
摘要
Abstract
To study the oxidation characteristics of coal pyrolysis semi-coke,understand the variation of main gas indexes,and guide the monitoring and early warning of reignition disaster in the fire area,the programmed-temperature-rise method was employed to simulate the oxidation and temperature rise process of non-caking coal from Changcaodong fire zone in Xinjiang and its semi-coke with different pyrolysis degrees.The gas components and concentrations at different oxidation temperatures were test-ed.Furthermore,the correlation between the gas indexes and oxidation temperatures were evaluated by grey relational analysis and partial least-square methods.The results show that,similar to the raw coal,the main gas products during semi-coke oxidation are CO,CO2,CH4,C2H6,C2H4.The production of these gases all increases with the rise of oxidation temperature.However,with the increase in the pyrol-ysis degree,CH4,C2H6,C2H4 disappear gradually.Compared with the raw coal,at the same oxidation temperature,the oxygen consumption and the production of CO,CO2,CH4,C2H6 of the semi-coke first increase and then decrease with the increase in the pyrolysis degree,and the production of C2H4 de-creases.There is an multiple linear relationship between the concentrations of CO,C2H6,C2H4,and the R2 value and the oxidation temperature.The variation trend of R2 is highly similar to that of the oxida-tion temperature.To reduce errors in the prediction of reignition disasters,the influence of changes in the gas products of residual semi-coke in the fire area on gas concentrations should be given a compre-hensive consideration,with the appropriate gas indicators and correlation models selected.关键词
煤/热解半焦/氧化/气体产物/预测预报Key words
coal/pyrolysis semi-coke/oxidation/gas product/prediction分类
矿山工程引用本文复制引用
李青蔚,吕自琦,宋经川,魏钦,肖旸..低阶煤热解半焦氧化过程气体产生规律[J].西安科技大学学报,2025,45(3):491-499,9.基金项目
新疆维吾尔自治区重点研发计划项目(2022B03025-2) （2022B03025-2）
陕西省教育厅青年创新团队科研计划项目(24JP109) （24JP109）
