摘要
通过热解将煤转化为一种清洁能源是煤清洁利用的一种重要途径。通过将煤与PVC在一定比例下热压成型后,制备成型半焦过程中PVC的添加对成型半焦性质的影响。采用扫描电镜、热值分析仪、拉曼光谱和红外光谱对成型半焦进行测试分析,研究了不同热解温度和混合比例对成型半焦性质的影响。结果表明:添加PVC可大幅提升型煤强度,无加时破碎指数为86.51%,添加PVC后破碎指数可达到99.2%,强度提升14.7%。同时,添加PVC有助于半焦内部孔隙的发展;成型半焦的热值与PVC添加量成正比,并在混合比例1∶2时热值达到20.84 MJ/kg,相比原煤半焦的热值18.34 MJ/kg提升了13.6%。
The conversion of coal into a clean energy by pyrolysis is an important way to clean coal.The effect of the addition of PVC on the coke properties was study.The coke prepared by hot pressing of coal and PVC mixture at a certain ratio.Scanning electron microscopy,calorific value analyzer,Raman spectroscopy and FT-IR were used in this study.The effects of different pyrolysis temperatures and mixing ratios on the coke properties were investigated.The results show that the addition of PVC can greatly increase the strength of briquette.When without PVC addition the strength of coke is only86.51%,and when the mixing ratio reaching 1∶2,the strength is reduced to 99.2%.The addition of PVC also can develop the pore structure of coke.The calorific value of coke increased with the addition of PVC,and the calorific value reaches 20.84 MJ/kg at a mixing ratio of 1∶2,which is 13.6%higher than the calorific value of the raw coal semi-coke.The calorific value of the raw coal semi-coke reaches 18.34 MJ/kg.
作者
夏子皓
张凤霞
胡建杭
XIA Zi-hao;ZHANG Feng-xia;HU Jian-hang(Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming 650093,China;Kunming Metallurgy College,Kunming 650033,China)
出处
《煤炭技术》
CAS
2020年第12期162-167,共6页
Coal Technology
基金
国家自然科学基金(No.51376085)
NSFC-云南联合基金(No.U1602272)
云南省科技领军人才项目(2015HA019)
国家重点实验室自主课题(CNMRCUTS1706)。
关键词
PVC
长焰煤
半焦
强度
热值
PVC
long flame coal
semi-coke
strength
calorific value
