筛分方式对蔗渣含髓率测定的影响

2018-10-21 15:41:57王成王霄梁辰石美玲覃程荣黄显南
中国造纸 2018年3期

王成 王霄 梁辰 石美玲 覃程荣 黄显南

摘要:分别采用顶击式标准振筛机、拍击式标准振筛机、数显调速多用振荡器进行蔗渣含髓率测定的筛分实验,并分别对筛出的蔗髓进行分析,确定3种筛分方式对蔗髓的筛分效果。结果表明,不同设备筛分测得的含髓率差别较大,与设备的运动方式有关,其中顶击筛的筛分效果最为稳定。3种筛分方式筛出蔗髓中综纤维素含量超过80%,而木素含量仅有蔗渣木素含量的50%左右。蔗髓中细胞的平均长度和宽度均较小,分布较为集中。通过形貌观察可以看出蔗髓中除含有较多薄壁细胞外,还有较多的细短的纤维状细胞。

关键词:蔗渣;含髓率;筛分设备;化学组分;纤维分析

中图分类号:TS49+6文献标识码:ADOI:1011980/jissn0254508X201803007

收稿日期:20171106(修改稿)

*通信作者:梁辰,博士,讲师;主要从事木质纤维原料综合利用方面的研究。Effect of Screening Method on Determination of Pith Content in BagasseWANG Cheng1,4WANG Xiao1,4LIANG Chen1,3,4,*SHI Meiling2,3QIN Chengrong1,3,4HUANG Xiannan2

(1 College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004;

2 Guangxi Paper Association, Nanning, Guangxi Zhuang Autonomous Region, 530004;

3 Guangxi Technical Association of Paper Industry, Nanning, Guangxi Zhuang Autonomous Region, 530004;

4 Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control, Nanning, Guangxi Zhuang Autonomous Region, 530004)

(*Email: liangchen@gxueducn)

Abstract:In this paper, the determination of pith content of bagasse was carried out by using the Standard Tophit Vibrating Screen, the Standard Slap Vibrating Screen and the Digital SpeedControlled Multipurpose Oscillator respectively The pith was screened and analyzed, to evaluate the effect of screening equipment on screening of bagasse pith Results showed that the pith content measured by different devices was different, which was attributed to the movement mode of the equipment The holocellulose content of pith was more than 80%, while the lignin content was only about half of the content of bagasse The average length and width of the cells in pith were smaller and they had more concentrated distribution Through morphology observation, great amount of fine fibrous cells could be found in bagasse pith in addition to contain more parenchyma cells

Key words:sugarcan bagasse; pith content; screening equipment; chemical composition; fiber analysis

甘蔗制糖是廣西的支柱和特色产业,每生产1 t的蔗糖就会产生2~3 t蔗渣[1]。蔗渣中含有丰富的半纤维素、纤维素、木素等,是一种优良的造纸原料[2],利用蔗渣制浆造纸是广西制糖产业链上的重要一环,是广西糖业循环经济的重要组成部分,其综合利用的社会效益和环境效益显著。制浆造纸企业是规模化的连续生产型企业,持续不断的原料供应、均一稳定的原料质量是正常生产进行的基本保障。蔗渣中含有大量海绵状非纤维的杂细胞,生产中常称之为蔗髓[3]。蔗髓质地松软,吸水性强,在蒸煮中首先和药液发生反应,影响蒸煮的均匀性,降低纸浆得率,增加化学品的消耗,纸浆滤水困难[4],抄纸时易糊网粘缸,成纸强度降低[57],纸张发脆[8],透光点多。……

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