Abstract

Energy efficiency is one of the key criteria for evaluating the performance of an air classifier mill in the aquafeed industry. A pilot-scale air classifier mill was utilized to evaluate the influence of impact velocity, number of hammers, and air mass flow rate on the grinding performance. By measuring the input torque and speed, the input energy of the grinding process was obtained and used to quantitatively investigate the no-load power consumption, total specific energy, and effective specific energy. The influence of the number of hammers and revolution speed on the no-load power consumption was studied. The power required to deal with air resistance was found to be the main contributor to the no-load energy. The parameter settings to achieve the lowest total specific energy were determined. The effective specific energy, indicating the efficiency of energy usage, decreased with the increase in impact frequency and speed. The results of this study can serve as a reference in the selection of operating parameters and the design of the mechanical structure of air classifier mills to reduce energy consumption and production costs, especially for the aquafeed industry.

摘要

能源效率是评估水产饲料行业空气分级磨机性能的关键标准之一。使用中试规模的空气分级磨来评估冲击速度、锤子数量和空气质量流量对研磨性能的影响。通过测量输入扭矩和速度，得到磨削过程的输入能量，并用于定量研究空载功耗、总比能和有效比能。研究了锤头数量和转速对空载功耗的影响。发现处理空气阻力所需的功率是空载能量的主要贡献者。确定了实现最低总比能的参数设置。有效比能量，表明能量使用效率随着冲击频率和速度的增加而降低。本研究结果可为空气分级磨机的运行参数选择和机械结构设计提供参考，以降低能耗和生产成本，特别是对水产饲料行业而言。