提出了亚纳米木粉粒度的概念,分析亚纳米木粉的制取过程,并对设备结构和原理进行了分析.鉴于亚纳米木粉的粉碎极限、能耗规律与木粉颗粒的物性,提出采用循环式切削粉碎与气流分选相融合的亚纳米木粉粉碎理论.在亚纳米木粉的粉碎工艺中,将分级设备与粉碎设备连为一体,不断将已经达到目数要求的亚纳米木粉滤出,使未达到要求的再返回粉碎室进行循环式加工.该工艺不但减轻了微细颗粒在粉碎中的团聚,提高了能量的利用率,同时也确保产品的目教、粒度分布的均匀性和亚纳米木粉质量的一致性,并提高了加工效率.%The concept of particle size of sub-nanometer wood flour is proposed in this paper. The preparation process of sub-nanometer wood flour is analyzed. The structure and principle of the equipment are discussed in view of the limit of sub-nanometer. The theory of grinding sub-nanometer wood flour adopting the methods of circular cutting, grinding and air separation is put forward, in view of the grinding limit, energy consumption laws and physical properties of particle size of wood flour. In the grinding process of sub-nanometer wood flour, the grading equipment and the grinding equipment are combined into one system, which constantly filters out the sub-nanometer wood flour having reached the requirements of mesh, while the wood flour not meeting the requirements is put back into the grinding room and processed circularly. In this process, not only the situation of reunion of fine particles is reduced and the energy utilization is improved, but also the mesh number of products, uniformity of particle size distribution and consistency for the quality of sub-nanometer wood flour is ensured; thereby, the machining efficiency is improved.
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