生物质型煤的成型机理和防水性能  

Briquetting mechanism and waterproof performance of bio-briquette

作　　者：黄光许[1] 谌伦建[1] 曹军[2] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]河南科技学院机电学院,河南新乡453003

出　　处：《煤炭学报》2008年第7期812-815,共4页Journal of China Coal Society

基　　金：河南省高校杰出科研人才创新工程项目(2003KYCX010)

摘　　要：采用红外光谱对玉米秸秆原料与其经处理制得的生物质型煤黏结剂进行了对比研究,并借助显微观测系统对生物质型煤的微观结构进行了观察分析.结果表明,生物质型煤黏结剂中存在大量未反应的生物质纤维,它们在型煤内部形成多级网络结构,对煤粒起连接作用,这种多级网络结在型煤浸泡24 h后仍然存在.秸秆原料在处理后部分降解,降解产物与黏结剂中的其它液态组分一起形成黏稠液,在型煤内部起黏结作用,黏稠液固化后具有一定的强度和防水性.生物质纤维形成的多级网络结构和黏稠液的存在是生物质型煤成型和具有防水性的关键.Maize stalk and bio-briquette binder made from it were studied comparatively by FFIR, and the microstructure of bio-briquette were observed and analyzed by microscopy. It is found that, a large amount of unreacted biomass fibers exist in binder, which form multi-level network structure inside the bio-briquette and could make fine coal particles connected together. The multi-level network structure would be still present after the bio-briquettes are immersed in water for 24 hours. On the other hand, stalk materials could be partly degraded after treatment, and with other liquid ingredients in binder, the degradation products could form a viscous fluid, which would work as bonding ingredient inside the bio-briquette, and could improve the waterproof ability of the bind after solidification. Therefore, the multi-level network structure of biomaterial and the present viscous fluid are very important to the shaping and waterproof-ability improvement of bio-briquette.

关 键 词：生物质型煤 成型机理 防水性能 红外光谱 显微观测 

分 类 号：TQ534.2[化学工程—煤化学工程]