文献类型：期刊文献

中文题名：秸秆类生物质的粉碎特性研究

英文题名：Study on comminution characteristics of straw biomass

作者：Lu, Xincheng[1]; Guo, Xiaolei[1]; Wang, Shicheng[1]; Lu, Haifeng[1]; Liu, Haifeng[1]

机构：[1] State Key Laboratory of Coal Liquefaction, Gasification and Utilization with High Efficiency and Low Carbon Technology, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai, 200237, China

年份：2025

卷号：76

期号：7

起止页码：3539

外文期刊名：Huagong Xuebao/CIESC Journal

收录：EI(收录号：20253719146210)

语种：中文

外文关键词：Brittle fracture - Cellulose - Cotton - Energy efficiency - Grinding (comminution) - Grinding (machining) - Lignin - Moisture - Moisture determination - Particle size - Screen printing - Shear flow - Shear strength - Straw

摘要：One of the effective methods to enhance the efficiency of biomass gasification is to achieve high-efficiency and low-energy consumption in the fine powder preparation of raw biomass in a non-baked state. The comminution characteristics of five common types of straws (corn, sesame, wheat, cotton and reed) were investigated under different moisture content (0.3%—15.3%) and screen sizes (1.0, 1.5, 2.0 mm). It is found that moisture content, screen sizes and types of raw material have significant effect on specific energy consumption and particle size. With the decrease of moisture content, the specific energy consumption is reduced by 43.38%—61.64%, and can be reduced to 36.9 kW·h/t. The particle size parameter d90 of the product is reduced by 3.87%—22.36%. With the same moisture content, the specific energy consumption of the 1.0 mm screen is increased by 39.04% to 169.98% compared to that of the 2.0 mm screen. Mechanical tests reveal that the reduction of moisture content decreases the shear strength of straw by 12.36%—17.13%, and increases the Young’s modulus by 1.74%—9.00%. This leads to a transformation in the grinding mechanism, whereby plastic deformation is replaced by brittle fracture. On the other hand, the lignin filling the cellulose frame enhances the mechanical strength of the straw. The lignin content of cotton straw and reed are approximately twice that of the remaining three types of straw, so the specific energy consumption of cotton straw and reed comminuting is always higher than that of the other three types of straw at the same moisture content. Based on the specific energy consumption per unit mass of powder with a particle size less than 1 mm, it is found that the effective specific energy consumption Etcan be reduced a by a range of 21.06% to 55.54% when a 2.0 mm screen is utilized in comparison to a 1.0 mm screen. A prediction model of specific energy consumption based on moisture content and particle size was established with a deviation of less than ±15%. ? 2025 Materials China. All rights reserved.