生物质颗粒冷态致密成型热质传递机制研究

项目名称： 生物质颗粒冷态致密成型热质传递机制研究

项目编号： No.51476050

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 雷廷宙

作者单位： 河南省科学院高新技术研究中心

项目金额： 85万元

中文摘要： 生物质颗粒致密冷态成型理论研究受到国内外学术界的重视，但许多关键问题还未得到解决，如压应力与成型过程流变、热效应与成型燃料品质、热力耦合条件与成型燃料粘接机制等的内在联系。本项目根据生物质颗粒冷态致密成型不同阶段特点，依据弹塑性力学、摩擦学、传热学等理论，采用实验研究和理论分析相结合的方法，开展不同阶段生物质颗粒冷态致密成型流变特性研究。考察不同阶段压应力对生物质原料致密化过程的作用机理及流变规律，阐明致密成型过程中原料流变历史演化过程；开展生物质颗粒冷态致密成型热效应研究，考察摩擦热和变形热对生物质原料的软化和粘结作用，揭示热效应对成型燃料品质的影响规律；开展生物质颗粒冷态致密成型热质耦合机理研究，考察热力耦合对不同成型阶段的应力应变场、温度场的微尺度效应，阐明应力和热效应的协同作用对成型燃料综合性能的影响规律，提出生物质原料微观结合模式，揭示生物质颗粒冷态致密成型粘接机制。

中文关键词： 生物质；冷态致密成型；流变特性；热效应；粘结机制

英文摘要： Theory of densification under cold condition for biomass pellet is held in high regard by relevant scholars and researchers both at home and abroad, but many essential issues remain to be addressed for this technology. For example, internal relationships between compression stress and rheological at densification process, internal relationships between thermal effects and pellet quality, and internal relationships between combined stress and thermal effects and adhesion mechanism. In the proposed project, experimental study and theoretical analysis will be conducted on the rheological properties of densification under cold condition at different stage of biomass pellet production, combining elastic-plastic mechanics, tribology, and the theory of heat and mass transfer. The effects of compression stress will be investigated to reveal the evolution of biomass feedstock at different stage of densification process. Thermal effects such as friction and deformation heat formation on the softening and bonding of biomass feedstock during the densification process and final pellet quality will be investigated. The interaction of heat and mass transfer during the densification process, its effect on micro-scale stress, strain, and temperature fields will also be studied to reveal the combined stress and thermal effects on the characteristics of biomass pellet, biomass feedstock microscopic binding mechanism, and adhesion mechanism of densification under cold condition.

英文关键词： biomass;densification under cold condition;rheological properties;thermal effect;adhesion mechanism