Study on Erosion and Wear Law of U-bend During the Pneumatic Conveying of Coal Fly Ash
[Purposes]The objective of this study is to study the erosion and wear characteristics and par-ticle movement of dust particles on U-bend during the pneumatic conveying of coal fly ash.[Methods]The DPM model in fluent software was used to analyze the erosion and wear of the U-bend during the pneumatic conveying of coal fly ash,and the mathematical and physical models of the U-bend were es-tablished to numerically simulate and analyze the gas inlet velocity,dust particle size,particle mass flow rate and the radius of the U-bend bending.[Findings]The analysis results show that the maximum ero-sion rate increases gradually when the gas inlet velocity and particle mass flow rate increase,and the in-crease range is obvious.When the radius of rotational curvature increases,the maximum erosion rate de-creases.When the particle size increases,the maximum erosion rate shows a trend of first increasing,then decreasing,and finally increasing.[Conclusions]The conclusions obtained can provide technical support for the design and maintenance of U-bend.
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