Numerical simulation on dense phase pneumatic conveying of pulverized coal in horizontal pipe at high pressure

Pu, Wenhao; Zhao, Changsui; Xiong, Ya; Liang, Cai; Chen, Xiaoping; Lu, Peng; Fan, Chenwu

doi:10.1016/j.ces.2009.12.025

Cited by 57 publications

(32 citation statements)

References 37 publications

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“…Up to now, many experimental and theoretical researches on densephase conveying have been carried out, and some important results were obtained [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. When moisture content in pulverized coal increases, the conveying process becomes more complicated.…”

Section: Introductionmentioning

confidence: 99%

Effect of moisture content on dense-phase conveying of pulverized coal at high pressure

Chen

Liang

et al. 2011

Korean J. Chem. Eng.

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In dense-phase pneumatic conveying, the solid moisture content can significantly influence the conveying process, but there are very few studies in the open literature. In this study, the conveying experiments of two pulverized coals with various moisture contents were carried out at a 4 MPa high pressure and dense-phase pneumatic conveying facility. Results show that the whole conveying system can be stably and controllably operated under the condition that moisture content below ~8%. With the increase of moisture content up to ~8%, the mass flow rate of 280 µm pulverized coal increases at first and then decreases, while that of 55 µm pulverized coal decreases continuously. The method of solid friction factor correlation is used to investigate pressure drop of the horizontal pipe, and non-dimensional parameters--Fr number, moisture content M and solid loading ratio µ--are investigated. The pressure drop predictions by this correlation are in good agreement with the experimental data. The solid friction factor correlations indicate that the fine coal is more sensitive to M, and µ plays a more important role for the coarse coal.

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Section: Introductionmentioning

confidence: 99%

Effect of moisture content on dense-phase conveying of pulverized coal at high pressure

Chen

Liang

et al. 2011

Korean J. Chem. Eng.

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“…The particle solid concentration, velocity and drop of pressure were influenced by the particle restitution coefficients as well as friction. Pu et al (2010) adjusted the kinetic-friction model to the two-fluid model, to investigate the pneumatic conveying of dense-phase pulverized coal. Simulation predicted pressure gradients as well as solid concentration distribution presented good agreement with experiments and electrical capacitance tomography image.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations on a Small-Scale Air-Slide Conveyor

Xiang¹,

New²

2019

JAFM

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This study reports upon numerical investigations on a small-scale air-slide conveyor (ASC) model that is based on a full-scale industrial ASC currently in operation. For validation of the ASC model and prediction of details of cement flow distribution on time-basis, both steady-state and transient simulations are performed. Simulation results demonstrate the development of cement flow phenomenon and predict critical flow features in the system, which will be useful for predicting corresponding behavior in the full-scale industrial ASC. Mass balance is achieved and potential optimization technique is supported by simulation data. Both steady-state converged solution and results on time-basis are discussed. This study demonstrates the validity of ASC model design and paves the way for using similar numerical tools for future particle-laden flow studies. Lastly, it also offers design and optimization insights into such industrial ASC systems.

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“…Compared to the dilute‐phase pneumatic conveying, dense‐phase operation has the advantages of lower energy cost and reduced erosion of the transport materials because of lower gas velocity used . Thus, it has received more attention and is widely applied in many industrial processes such as conveying of pulverized coal to entrained flow gasifiers . However, unsteady flows usually occur due to uneven distribution of the solid materials in the conveying system, which brings about large pressure fluctuations and results in the increase of the risk of blockage .…”

Section: Introductionmentioning

confidence: 99%

Multi‐scale analysis of acoustic emission signals in dense‐phase pneumatic conveying of pulverized coal at high pressure

Yang

Huang

et al. 2016

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com) Acoustic emission technique in conjunction with multiscale processing method has been utilized to investigate the flow behavior of the dense-phase pneumatic conveying system at high pressure. A clearly defined classification of microscale, mesoscale, and macroscale signals has been put forward with the aid of wavelet transform and V statistics analysis. The detailed signals d 1 -d 4 , d 5 -d 7 , d 8 -d 10 were recomposed into the microscale, mesoscale, and macroscale signals, respectively, which represent microscale particle-wall interactions, mesoscale interaction between gas phase and solid phase (such as bubbles, plugs, dunes), and macroscale flow-induced pipe vibration. Further analysis shows that as the mass flow rate of pulverized coal increases, the energy fraction (energy of detailed signal divided by the energy of original signal) of microscale signals decreases while that of mesoscale signals increases, which indicates that particles are more likely to move as particle aggregates than individual particles when mass flow rate increases.

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Numerical simulation on dense phase pneumatic conveying of pulverized coal in horizontal pipe at high pressure

Cited by 57 publications

References 37 publications

Effect of moisture content on dense-phase conveying of pulverized coal at high pressure

Effect of moisture content on dense-phase conveying of pulverized coal at high pressure

Numerical Investigations on a Small-Scale Air-Slide Conveyor

Multi‐scale analysis of acoustic emission signals in dense‐phase pneumatic conveying of pulverized coal at high pressure

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