[1]邢成,丁涛*,李智,等.基于图像法的刨花板钻孔粉尘尺寸和形态分布研究[J].林业工程学报,2018,3(01):21-25.[doi:10.13360/j.issn.2096-1359.2018.01.004]
 XING Cheng,DING Tao*,LI Zhi,et al.Size and shape distribution of particles from particleboard drilling based on image analysis[J].Journal of Forestry Engineering,2018,3(01):21-25.[doi:10.13360/j.issn.2096-1359.2018.01.004]
点击复制

基于图像法的刨花板钻孔粉尘尺寸和形态分布研究()
分享到:

《林业工程学报》[ISSN:1001-8081/CN:32-1160/S]

卷:
3
期数:
2018年01期
页码:
21-25
栏目:
木材科学与技术
出版日期:
2018-01-15

文章信息/Info

Title:
Size and shape distribution of particles from particleboard drilling based on image analysis
文章编号:
2096-1359(2018)01-0021-05
作者:
邢成丁涛*李智高意君闻靓张晨
南京林业大学材料科学与工程学院,南京 210037
Author(s):
XING Cheng DING Tao* LI Zhi GAO Yijun WEN Liang ZHANG Chen
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
关键词:
图像法 木质粉尘 尺寸分布 形态分布 流动性
Keywords:
image analysis wood dust size distribution shape distribution flowability
分类号:
S784; X513
DOI:
10.13360/j.issn.2096-1359.2018.01.004
文献标志码:
A
摘要:
排钻开孔是板式家具生产中的一个关键环节,但排钻设备多数没有固定吸气罩,加工过程中产生的木粉尘难以收集,由此带来显著的环境影响。笔者采用图像法对刨花板排钻开孔加工过程中产生的粉尘进行尺寸和形态分析,讨论了粒度、粒形参数对粉尘流动性的影响,为排钻粉尘的有效治理提供基础数据。试验表明,排钻粉尘颗粒的尺寸分布较广,但多数粉尘的粒径小于100 μm,属于总悬浮颗粒物范畴,它们在空气中停留的时间较长,传播距离也因此较远。横纵比、圆度和凸度分析表明,排钻粉尘的形态随尺寸变化而产生显著差异,大颗粒总体上形态较不规则,而小颗粒则较为规整。排钻粉尘在产生、排屑和传播过程中相互碰撞和磨蚀是形成这种形态分布特征的主要原因。在收集和输送过程中,大颗粒排钻粉尘因形态不规则而容易相互接触咬合,并在颗粒间形成较多孔隙,小颗粒的形态特征虽然有利于流动,但相互间易发生团聚,当其填充在大颗粒间的孔隙时,流动性受到进一步限制,因而总体上看排钻粉尘的流动性较差。
Abstract:
Panel drilling is a key operation in the manufacturing of particleboard furniture. The dust emitted from this process is hard to collect due to the absence of dust collecting hood in the machine, resulting in the increased environmental concerns. In this study, the size and shape distribution of dust emitted from particleboard drilling was investigated by image analysis, and their effect on dust flowability was discussed. We aimed at providing the efficient dust collecting with data supports. The results showed that the dust sizes emitted from the drilling process were widely distributed. But most ISO area diameters of the particles were below 100 μm, making them fall into the category of total suspended particulates(TSP). The TSP can stay longer in the air and travel in a wider space, which is considered harmful to human health. The distribution of the aspect ratio, roundness and convexity showed that the dust shape changed significantly with the size change. The bigger particles exhibited more irregularity, while the smaller ones presented more homogeneous shape. This pattern was established by the collision and erosion among the particles during their generation and removal from the cutter and transmission in the air. With respect to dust collecting and conveying, bigger particles tended to interlock with each other, making them hard to move and leaving many voids between them. The smaller particles were easy to agglomerate although their regular shape indicated a good flowability. Besides, when falling into the inter-particle voids, their flowability was further restricted by the surrounding walls. It was therefore concluded that the overall flowability of the dust emitted from particleboard drilling was poor.

参考文献/References:

[1] MELANIE A, OLIVIER B, ALEXANDRE G, et al. Changes on wood powder morphology and flowability due to thermal pretreatment[C]∥XIII Congrès de la SFGP 2011 Société Française de Génie des Procédés: Des procédés au service du produit au coeur de l'Europe. Lille, France: Société Française de Génie des Procédés, 2011.
[2] TAO D, GUO X L, ZHONG G, et al. Size distribution of heat-treated Mongolia oak sawdust[C]∥ZHOU H D. Proceedings of the 19th International Wood Machining Seminar. Beijing: Scientific and Technical Documentation Press, 2009: 228-233.
[3] 丁涛, 顾炼百, 朱南峰, 等. 热处理材的铣削加工性能分析[J]. 木材工业, 2012, 26(2): 22-24.
DING T, GU L B, ZHU N F, et al. Milling process performance of heat-treated wood[J]. China Wood Industry, 2012, 26(2): 22-24.
[4] 童祜嵩. 颗粒粒度与比表面测量原理[M]. 上海:上海科学技术文献出版社, 1989.
[5] 耿君,丁涛,周捍东. 中密度纤维板砂光粉的粒径分布研究[J]. 木材加工机械, 2012, 23(6): 27-29.
GENG J, DING T, ZHOU H D. Study on particle size distribution of medium density fiberboard sanding dust[J]. Wood Processing Machinery, 2012, 23(6): 27-29.
[6] GIL M, TERUEL E, ARAUZO I. Analysis of standard sieving method for milled biomass through image processing. Effects of particle shape and size for poplar and corn stover[J]. Fuel, 2014, 116(1): 328-340.
[7] SAAD M, SADOUDI A, RONDET E, et al. Morphological characterization of wheat powders, how to characterize the shape of particles?[J]. Journal of Food Engineering, 2011,102(4): 293-301.
[8] SOUZA D O C, MENEGALLI F C. Image analysis: statistical study of particle size distribution and shape characterization[J]. Powder Technology,2011, 214(1): 57-63.
[9] RAWLE A. The importance of particle sizing to the coatings industry Part 1: Particle size measurement[J]. Advances in Colour Science and Technology, 2002, 5(1): 1-12.
[10] 章波, 冯怡, 徐德生, 等. 粉体流动性的研究及其在中医制剂中的应用[J]. 中成药, 2006, 30(6): 904-907.
[11] 谢晓旭, 沈湘林, 汤美雪, 等. 煤粉流动特性若干影响因素的研究[J].煤炭学报, 2008, 33(1): 85-88.
XIE X X, SHEN X L, TANG X M, et al. Study on some factors impacting flowability of pulverized coal[J]. Journal of China Coal Society, 2008, 33(1): 85-88.
[12] PAULRUD S, MATTSSON J E, NILSSON C. Particle and handling characteristics of wood fuel powder: effects of different mills[J]. Fuel Processing Technology, 2002, 76(1):23-29.
[13] GUO Q, CHEN X L, LIU H F. Experimental research on shape and size distribution of biomass particle[J]. Fuel, 2012, 94(1): 551-555.
[14] CLEARY P W, SAWLEY M L. DEM modelling of industrial granular flows: 3D case studies and the effect of particle shape on hopper discharge[J]. Applied Mathematical Modelling, 2002, 26(2): 89-111.
[15] ROBINSON D A, FRIEDMAN S P.Observations of the effects of particle shape and particle size distribution on avalanching of granular media[J]. Physica A: Statistical Mechanics and its Applications, 2002, 311(1/2): 97-110.
[16] GIL M, SCHOTT D, ARAUZO I, et al. Handling behavior of two milled biomass: SRF poplar and corn stover[J]. Fuel Processing Technology, 2013, 112(4): 76-85.

备注/Memo

备注/Memo:
收稿日期:2017-04-03 修回日期:2017-07-23
基金项目:国家重点研发计划(2016YFD0600703-3); 大学生创新训练计划项目(201510298038Z)。
作者简介:邢成,男,研究方向为木材工业粉尘治理。通信作者:丁涛,男,副教授。E-mail: dtroy921@hotmail.com
更新日期/Last Update: 2018-01-10