Modeling of a Straw Ring-die Briquetting Process

作者：Xia Xianfei; Sun Yu^*; Wu Kai; Jiang Qinghai

来源：BioResources, 2014, 9(4): 6316-6328.

DOI：10.15376/biores.9.4.6316-6328

• Briquetting
• Straw
• Productivity
• Mechanical modeling
• Torque

Efficient utilization of biomass resources is crucial for providing renewable energy and mitigating the risk of environmental pollution caused by crop straw burning in China. Straw ring-die briquetting forming is a convenient densification technology to make the low density biomass into briquette fuel; however, the energy consumption of this process is still a challenge. Productivity and torque modeling were carried out in this study on the basis of theoretical derivation. Generally, the straw briquetting process is divided into a compression deformation stage and an extrusion forming stage with the die structure (ring die and roller radius ratio lambda) and friction angle phi being the main factors that affect the productivity. Mechanical modeling based on material compaction and calculation modeling based on die-hole pressure were considered for the calculation of sigma(ax) in the torque model. A calculation case was then conducted according to the theoretical model, and actual productivity and torque testing were performed for validation purposes. Results show that this deduced productivity model is successful because the deviation is 4.61%. The torque model determined by the calculation model based on die-hole pressure had a better accuracy with a deviation of 6.76%.

• 出版日期2014-11
• 单位南京理工大学