煤气化细渣残炭与煤的掺烧及其气体释放特性
Co-combustion Characteristic and Gas Emission Characteristic of Entrained Flow Gasification Fine Slag Residual Carbon and Coal
折成林 1白永辉 2于广锁 3刘夏青 1马利 1方鹏程 1李芳1
作者信息
- 1. 国家能源集团 宁夏煤业有限责任公司煤制油化工公用设施管理分公司,宁夏 银川 750021
- 2. 宁夏大学 化学化工学院,宁夏 银川 750021
- 3. 宁夏大学 化学化工学院,宁夏 银川 750021;华东理工大学 资源与环境工程学院,上海 200237
- 折叠
摘要
为了资源化、规模化利用大量堆积的固体废弃物煤气化细渣(coal gasification fine slag,FS),使用泡沫浮选法对FS中的残炭(residual carbon,RC)进行富集,通过热重分析仪探究RC单独燃烧及与烟煤共燃烧的特性,并对比实验结果与动力学计算结果,阐明RC单独燃烧及与煤共燃烧过程中颗粒的着火性能、燃尽性能、燃烧稳定性以及综合燃烧特性;通过质谱分析仪探究RC单独燃烧及与煤共燃烧过程中CO,CO2,NO2的排放规律.结果表明,浮选过程降低了FS中铝硅酸盐的聚合度,能够有效富集RC;在与煤共燃烧过程中,添加烟煤能够显著改善RC的燃烧反应性,添加不同质量的RC,能够有效减少烟煤燃烧过程中污染物的释放强度,当与煤共燃烧体系中RC的质量分数为80%时,NO2的释放量最少.
Abstract
In order to utilize the large amount of accumulated solid waste coal gasification fine slag(FS)in a resourceful and large-scale manner,this study uses froth flotation to enrich the residual carbon(RC)in FS.The characteristics of RC combustion alone and its co-combustion with bituminous coal are investigated using a thermogravimetric analyzer.By comparing experimental results with kinetic calculations,the ignition perfor-mance,burnout performance,combustion stability,and comprehensive combustion characteristics of particles during single and co-combustion processes are elucidated.Additionally,the emission patterns of CO,CO2,and NO2 during the combustion of RC alone and in combination with coal are explored using a mass spectrometer.The results show that the flotation process effectively reduces the aluminosilicate polymerization degree in FS,enriching RC.The addition of bituminous coal significantly enhances the combustion reactivity of RC during co-combustion.Different mass ratios of RC can effectively reduce pollutant emissions during the combustion of bituminous coal,with an 80% RC mass fraction resulting in the lowest NO2 emissions.
关键词
煤气化细渣/泡沫浮选/共燃烧特性/气体释放Key words
fine slag/froth flotation/co-combustion characteristics/gas release引用本文复制引用
基金项目
国家自然科学基金资助项目(22168032)
宁东能源化工基地重点基金资助项目(2023NDKJXMLX022)
出版年
2024
国家科技期刊平台
NSTL
万方数据