炭化工艺对生物质煤焦性能的影响  

Effects of Carbonization Processes on Properties of Biomass Coal Char

作　　者：王辉 李贺 刘超 张玉柱 WANG Hui;LI He;LIU Chao;ZHANG Yuzhu(College of Metallurgy and Energy,North China University of Science and Technology,Key Laboratory of Modern Metallurgical Technology,Ministry of Education,063210 Tangshan,China)

机构地区：[1]华北理工大学冶金与能源学院,现代冶金技术教育部重点实验室,河北唐山063210 [2]不详

出　　处：《煤炭转化》2020年第3期51-56,共6页Coal Conversion

基　　金：国家自然科学基金资助项目(51874139);华北理工大学研究生创新项目(2019B23)。

摘　　要：通过改变生物质的炭化段数和混煤加压成型等工艺参数,探究不同炭化工艺对生物质煤焦产率、孔隙率、抗压冷强度和燃烧性能的影响。结果表明:对生物质混煤原料加压成型可以使生物质煤焦的产率提高至少4%,最高可达58.81%;孔容、孔径、比表面积和孔隙率均有一定程度的下降;抗压冷强度提高7倍~8倍,最大可达1.23 MPa;着火点提高20℃,放热速率基本没变。对生物质低温炭化再混煤加压可以使生物质煤焦的产率提高至少5%,最高可达59.39%;孔隙率大幅度下降,孔容、孔径和比表面积变化不大;抗压冷强度提高19倍~24倍,最大可达3.77 MPa;放热区间增大,放热速率减小,着火点基本不变。The effects of different carbonization processes on the yield,porosity,compressive cold strength and combustion performance of biomass coal char were studied by changing the number of carbonization stages and pressure molding parameters of blended coal.The results show that the yield of biomass coal char can be increased by at least 4%,up to 58.81%;the pore volume,pore diameter,specific surface area and porosity can be reduced to some extent;the compressive cold strength can be increased by 7-8 times,up to 1.23 MPa;the ignition point can be increased by 20℃,and the heat release rate is basically unchanged.Through the low temperature carbonization of biomass and the pressure of mixed coal,the yield of biomass coal char can be increased by at least 5%,up to 59.39%;the porosity is greatly reduced,the pore volume,pore diameter and specific surface area change little;the compressive cold strength is increased by 19-24 times,up to 3.77 MPa;the heat release rate is reduced and the ignition point has unchanged with the increase of the heat release area.

关 键 词：生物质煤焦 炭化段数 加压成型 燃烧性能 抗压冷强度 

分 类 号：TQ520[化学工程—煤化学工程]