双超声同步压缩生物质机床的研制及其工艺实验

Development of Machining Tool for Pelleting Biomass with Dual Ultrasonic Vibrators andits Technics Experiments

针对传统的生物质压缩成型技术存在的需要高温高压、额外添加黏接剂、添加剂导致污染等一系列问题,提出了一种双超声同步压缩生物质成型技术,研制了一台双超声同步压缩生物质机床。对超声振动系统进行了详细的设计,并通过仿真分析和实验验证了设计的合理性。通过对生物质进行压缩的工艺实验,验证了双超声同步压缩生物质装置的良好性能。研究结果表明:在生物质压缩过程中施加超声波振动,能够有效降低压块厚度,增大压块密度,并且随着超声功率的增大,压块厚度减小,密度增大。

Aimed at a series of problems existed in the traditional biomass pelleting technology, such as needing of high tempera- ture, high pressure, and the pollution resulting from additional additives, a dual ultrasonic pelleting technology of biomass was presen- ted, and a pelleting machining tool was developed. A detailed design of ultrasonic vibration system was carried out, and its rationality of the design was verified through simulation analysis and experiments. The technics experimental results demonstrated the high per- formance of the dual ultrasonic pelleting biomass system. The results show that the thickness of the pellets with ultrasonic vibration process is effectively decreased, and the density of the pellets is increased. Moreover along with ultrasonic power increasing, the thick- ness of pellets is reduced, and density is increased.