International Journal of Information Technology and Computer Science(IJITCS)

ISSN: 2074-9007 (Print), ISSN: 2074-9015 (Online)

Published By: MECS Press

IJITCS Vol.2, No.1, Nov. 2010

Research of CWS’ Particle Size Distribution based on Ultrasonic Attenuation Theory

Full Text (PDF, 287KB), PP.25-31

Views:60   Downloads:0


WANG Weidong,ZHANG Chenglian,CHU Fengge

Index Terms

Coal water slurry; effective medium model; size distribution; ultrasonic wave


The key to reduce coal pollution is the development of clean coal technology and the improvement of the backward coal-burning technology. The coal water slurry (CWS) is the first substitute of the oil. The particle size distribution of CWS plays an important role in the quality control of CWS. Now there are three methods that are used to analysis the particle size distribution of CWS, screening method, settlement method, laser method. These methods produce some disadvantages when be used to forecast the distribution of CWS. Thus, this article proposes an ultrasonic method with effective medium theory model which can be accurately reflected in the acoustic attenuation characteristics of coal-water slurry based on structural average. Experimental simulation proved that effective medium model is fully capable of achieving on-line detection of coal-water slurry particle size, for detection of fine-and coarse-sized particle size distribution. Non-linear relationship between attenuation and particle size, the three-frequency method can be used to inverse calculation of its. Which we can achieve CWS granularity on-line, and continuously control the quality of CWS.

Cite This Paper

WANG Weidong, ZHANG Chenglian, CHU Fengge, "Research of CWS’ Particle Size Distribution based on Ultrasonic Attenuation Theory", International Journal of Information Technology and Computer Science(IJITCS), vol.2, no.1, pp.25-31, 2010. DOI: 10.5815/ijitcs.2010.01.04


[1]Zhang Rongzeng. CWM Preparation of [M]. Beijing: Science Press, 1996.(in Chinese)

[2]Wang Chuan-Jian, Hao and India. CWS on behalf of the oil inspection report. A study tour for Ministry of Coal Industry Report, 1985. (in Chinese)

[3]Su MingXu, Cai Xiaoshu, Huang Chunyan et al. Ultrasonic attenuation measurement of particle size [J]. Instrument Technology (Supplement). 2004,25 (4) :1-2. (in Chinese)

[4]T. Allen. Particle size determination [M]. China Building Industry Press, 1984 (8)

[5]Suming Xu, Cai Xiaoshu, Xu Feng, et al. Measurement of ultrasonic attenuation in suspension of particle size and concentration [J]. Acoustics. 2004,29 (5) :440-444.

[6]He Guichun. Ultrasonic slurry particle size measurement of nonlinear modeling of [D]. Beijing: Beijing University of Technology, 2006. (in Chinese)

[7]Su Mingxu. Particle two-phase medium particle size and concentration of ultrasonic measurement theory [D]. Shanghai: Shanghai University of Technology, 2002. (in Chinese)

[8]Epstein P S, Carhart R R. The Absorption of Sound in Suspensions and Emulsions: I. Water Fog in Air.J.Acoust [J].Soc.Am.1953, 25:553~565.

[9]Waterman P C,Truell R. Multiple Scattering of waves [J]. J. Math. Phys. 1961, 2:512~540.

[10]Allegra J R, Hawley S A. Attenuation of Sound in Suspensions and Emulsions: Theory and Experiments [J]. J. Acoust. Soc.Am.1972, 51:1545~1564.

[11]Y. Hemar, li. Herrmann, P. LemarAchal, R. Hocquart and F, Lequeux.Effective Medium Model for Ultrasonic Attenuation Due to the Thermo-Elastic Eftect in Concentrated Emulsions [J].J. Phys. II Fance 7 1997.637~647.

[12]L. L. Foldy.the multiple scattering of waves, Phys. Rev. 1945, 67, 107~119.

[13]P C. Waterman and R Truell. multiple scattering of waves, J. Math.Phys. 2, 512–537 ~1961.

[14]P. Lloyd and M. V. Berry, Wave propagation through an assembly of spheres. IV. Relations between different multiple scattering theories, Proc. Phys. Soc. London 91, 678~688, 1967.

[15].C.Waterman and Rohn Truell. Multiple Scattering of Waves [J]. J. Mathematical Physics, 1961, 2:513~540.

[16]L. L. Foldy.The multiple scattering of waves. I. General theory of isotropic scattering by randomly distributed scatterers [J]. Phys. Rev. 67, 107~119, 1945.

[17]XIA Yuming, WANG Weidong, and XU Zhiqiang, "Numerical computation of laminar flow pipeline transport axial flow field," 2009 International Conference on Information Technology and Computer Science (ICITCS 2009), 2009, pp. 196-199. (in Chinese)

[18]XIA Yuming, WANG Weidong, TIAN Jinyun , XU Zhiqiang, "Computational error of laminar flow pipeline transport axial flow field," 2009 International Conference on Computer Science and Information Technology (ICCSIT 2009), 2009, pp. 635-639.

[19]U Riebel. The fundamentals of particle size analysis by means of ultrasonic spectrometry [J].Particle and Particle Systems Characterisation, 1989, 6:135~143.

[20]P.C. Warterman, R.Truell.Multiple Scattering of Waves [J]. J.Math.Phys. Vo12. 1961. P512~540.

[21]Xu Zhiqiang, Chong Liqin, Wang Weidong. Coal Water Mixture Preparation Technology and Application in Replacing Oil to Generate Electricity. APPEEC 2009 Conference,2009,3.

[22]Wang Weidong, Tian Jinyun, Zhang Chenglian, Xu Zhiqiang. Study of coal water slurry Particle Size Distribution with Ultrasonic Testing Theory[J]. APPEEC 2010 Conference,2009,3.

[23]U Riebel. The fundamentals of particle size analysis by means of ultrasonic spectrometry [J], Particle and Particle Systems Characteisation,1989,6,135~143.

[24]V. Twersky.On scattering of waves by random distributions. I. Freespace scatterer formalism [J]. J. Math. Phys. 3, 700~715, 1962.

[25]Michael Baudoin, Jean-Louis Thomas, François Coulouvrat and Daniel Lhuillier.An extended coupled phase theory for the sound propagation in polydisperse concentrated suspensions of rigid particles [J]. 2007 Acoustical Society of America.