原煤与氧化煤在不同氧气浓度下的氧化特性研究
Study on oxidation characteristics of raw coal and oxidized coal at different oxygen concentrations
梁运涛 1罗奕杭 2贾宝山 2孙勇 3王同友 4崔鑫峰 3段佳磊2
作者信息
- 1. 辽宁工程技术大学安全科学与工程学院,辽宁阜新 123000;煤炭科学研究总院,北京 100013;煤矿安全技术国家重点实验室,辽宁抚顺 113122
- 2. 辽宁工程技术大学安全科学与工程学院,辽宁阜新 123000
- 3. 煤矿安全技术国家重点实验室,辽宁抚顺 113122;中煤科工集团沈阳研究院有限公司,辽宁抚顺 113122
- 4. 山东唐口煤业有限公司,山东济宁 272055
- 折叠
摘要
通过自主研发的程序升温装置,以山东唐口烟煤为研究对象,分析了原煤与氧化煤在不同氧气浓度下的耗氧速率、放热强度、CO气体浓度、特征温度、交叉点温度的变化规律.结果表明,在21％氧气体积分数下,原煤的耗氧速率、放热强度均高于氧化煤,原煤的CO量反应初期小于氧化煤,后期大于氧化煤;在15％,10％氧气体积分数下,原煤的耗氧速度、放热强度低于氧化煤,氧化煤产生的CO量总高于原煤;在5％氧气体积分数下,原煤的耗氧速度、放热强度前期大于氧化煤,后期小于氧化煤,氧化煤产生的CO量总高于原煤.随着氧气体积分数的下降,原煤和氧化煤的特征温度都逐渐升高;在21％,15％氧气体积分数下,氧化煤的特征温度都低于原煤的特征温度,10％,5％氧气体积分数条件下原煤和氧化煤的临界温度和干裂温度相差不明显;随着氧气体积分数下降,原煤和氧化煤的交叉点温度都增大,且氧化煤的交叉点温度相较于原煤更提前.
Abstract
Based on the self-developed programmed temperature device,taking the bituminous coal in Tangkou,Shandong Province as the research object,the changes of oxygen consumption rate,heat release intensity,CO gas concentration,characteristic temperature and cross point temperature of raw coal and oxidized coal under different oxygen concentrations were analyzed.The results show that at 21％oxygen volume fraction,the oxygen consumption rate and heat release intensity of raw coal are higher than that of oxidized coal,and the CO content of raw coal is lower than that of oxidized coal at the initial stage and greater than that of oxidized coal at the later stage.At 15％and 10％oxygen volume fraction,the oxygen consumption rate and heat release intensity of raw coal are lower than that of oxidized coal,and the CO produced by oxidized coal is higher than that of raw coal.Under the oxygen volume fraction of 5％,the oxygen consumption rate and heat release intensity of raw coal are higher than that of oxidized coal in the early stage and lower than that of oxidized coal in the later stage,and the CO produced by oxidized coal is higher than that of raw coal.With the decrease of oxygen volume fraction,the characteristic temperature of raw coal and oxidized coal increases gradually.At 21％and 15％oxygen volume fraction,the characteristic temperature of oxidized coal is lower than that of raw coal.At 10％and 5％oxygen volume fraction,there is no significant difference between the critical temperature and dry cracking temperature of raw coal and oxi-dized coal.With the decrease of oxygen volume fraction,the cross point temperature of raw coal and oxidized coal increases,and the cross point temperature of oxidized coal is earlier than that of raw coal.
关键词
煤自燃/程序升温/不同氧气体积分数/二次氧化/特性参数Key words
coal spontaneous combustion/temperature program/different oxygen volume fractions/sec-ondary oxidation/characteristic parameter引用本文复制引用
基金项目
国家自然科学基金资助项目(52174229)
出版年
2024
NETL
NSTL
万方数据