Mechanical size reduction, due to its significant effect on transport phenomena and biodegradability, is the crucial initial step in the production of advanced biofuels. As is generally known, particle size reduction is high energy demand operation. Energy requirements were experimentally studied and mathematically modelled for the processing of wheat straw with 4.6% moisture content wet basis that was reduced in size using a knife mill. The characteristic particle sizes for wheat straw before and after milling were analysed using the Rosin-Rammler-Sperling-Bennet model of particle size distribution. Energy demand 0.7–21.2 kWh t−1 was reported for size reduction of wheat straw with size reduction ratio D50 equal to 1.13–3.86. Applying the theory of energy demand modelled by Rittinger, it was confirmed that treated wheat straw displayed brittle behaviour. Energy demand for size reduction of wheat straw can be therefore be estimated using Rittinger theory with Rittinger constant value of 9.9 kWh mm t−1.

中文翻译：

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刀磨机对麦草进行机械粉碎的粒度特性和比能需求建模

由于其对运输现象和生物降解性的显着影响，机械尺寸减小是生产先进生物燃料的关键初始步骤。众所周知，粒度减小是高能量需求的操作。对湿基水分含量为 4.6% 的小麦秸秆的加工进行了实验研究和数学建模，该秸秆使用刀磨机减小了尺寸。使用粒度分布的 Rosin-Rammler-Sperling-Bennet 模型分析碾磨前后小麦秸秆的特征粒度。能量需求为 0.7-21.2 kWh t-1，用于小麦秸秆的粉碎，粉碎率 D50 等于 1.13-3.86。应用 Rittinger 建模的能源需求理论，经证实，处理过的麦秆表现出脆性。因此，可以使用 Rittinger 理论估算小麦秸秆粉碎所需的能量，其中 Rittinger 常数值为 9.9 kWh mm t-1。