柔性颗粒流动特性测试与试验研究

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摘要本试验研究采用BT-1000粉体综合特性测试仪，对豆秸秆、稻壳粉、蔗渣、软木木屑以及硬木橡木粉这五种生物质柔性颗粒进行流动特性测试，获取目数为24-50目和大于50目两组的特性参数，结合Carr指数表分析计算各样参数的加权和，得到样品的流动性指数和喷流性指数，以此评价颗粒物料的流动特性。并与刚性颗粒煤粉，食用粉体小麦淀粉和干奶粉，以及中药粉体进行横向比较，判断流动性的强弱。结果表明：目数为24-50目时，稻壳粉的流动性和喷流性相对较好，软木木屑的流动性和硬木橡木的喷流性相对较差；目数大于50目时，硬木橡木的流动性较好，蔗渣和软木木屑的喷流性较好，豆秸秆的流动性和稻壳粉的喷流性较差；单独比较软木和硬木，在相同目数下，硬木橡木的流动性更好，而软木木屑的喷流性更好；在本试验目数范围内，柔性颗粒的粒径越小即目数越大，其流动性能越差，而喷流性越好；在相同目数下，煤粉的流动性比本试验样品流动性差；小麦淀粉和干奶粉的压缩度都比较大，所以流动性比本试验样品较差；精制冠心方提取物、陈皮提取物、甘草提取物、清喉咽方提取物及乐脉方提取物的流动性叫本实验样品更差，而三种纤维素粉体的流动性中等，比本实验样品的流动性更好。64358

毕业论文关键词柔性颗粒流动特性生物质 Carr指数

毕业设计说明书（论文）外文摘要

Title Testing and Experimental Research on Flow Characteristics of Flexible Particles

Abstract The tests study uses the Bt-1000 powder characteristics tester, to test bean straw, rice husk powder, bagasse, sawdust and oak of these five biomass flexible particles flow characteristics and obtain 24-50 mesh and greater than 50 mesh groups parameters, combined with Carr index sheet analysis and calculation of the weighted flow parameters to obtain a sample of the liquid index and jet index to evaluate the flow characteristics of granular materials. Rigid particles with coal, food powder wheat starch and dry milk, as well as traditional Chinese medicine powder in horizontal compared to determine the strength of liquidity. The results showed that: When the mesh is 24-50 mesh, the liquidity and jet of rice husk powder are relatively good, the liquidity of softwoods and the jet of hardwood oak are relatively poor; The mesh is larger than 50 mesh, the liquidity of hardwood oak is better,the jet of bagasse and softwoods is poor; Compare softwood and hardwood alone in the same mesh, the liquidity of hardwood oak is better, however, the jet of softwoods is poor; In this experiment the range of mesh, flexible particle size smaller, that the larger the mesh number, the worse its flow properties, and the better its jet; In the same mesh, the pulverized coal flow characteristics illiquid than the test sample; Wheat starch and dry milk powder Compression Ratio was relatively large, so the liquidity of wheat starch and dry milk is relatively poor than the test sample; The liquidity of extract of refined coronary party , extract of orange peel and extract of licorice is relatively poor than the test sample; Three kinds of cellulose powder liquid medium, the flow over the test sample is better.

Keywords Flexible particles Flow characteristics Biomass Carr Index

1 绪论 1

1.1 国内外现状与分析 2

1.2 课题研究内容 3

1.3 选题意义及研究目的 4

2 流动性介绍 5

2.1 表征方法 6