NUMERICAL SIMULATION ON SCALING BY LEACHATE PIPE TRANSPORT BASED ON CFD

ZHAO Rui; DU Sen; LI Min; LIU Yan; ZHANG Luziping

doi:10.13205/j.hjgc.202303015

Volume 41 Issue 3

Mar. 2023

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ZHAO Rui, DU Sen, LI Min, LIU Yan, ZHANG Luziping. NUMERICAL SIMULATION ON SCALING BY LEACHATE PIPE TRANSPORT BASED ON CFD[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 111-118,128. doi: 10.13205/j.hjgc.202303015

Citation:

ZHAO Rui, DU Sen, LI Min, LIU Yan, ZHANG Luziping. NUMERICAL SIMULATION ON SCALING BY LEACHATE PIPE TRANSPORT BASED ON CFD[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 111-118,128. doi: 10.13205/j.hjgc.202303015

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NUMERICAL SIMULATION ON SCALING BY LEACHATE PIPE TRANSPORT BASED ON CFD

doi: 10.13205/j.hjgc.202303015

Faculty of Geosciences and Environmental Engineering, Chengdu 611756, China

Received Date: 2022-05-30
Available Online: 2023-05-26
Publish Date: 2023-03-01

Abstract

Abstract

To mitigate the scaling by landfill leachate pipe transport, this study designed a fouling experiment by placing the pipe materials into the leachate. The computational fluid dynamics modelling was driven by the experimental data, to simulate the scaling process when the leachate flowing a straight pipe and 90° elbow-shaped pipe, respectively. The characteristics of scale deposition regard to the two pipe shapes were discriminated, and the impacts of different factors, including temperature, flow velocity, pipe wall roughness, scale particle size etc., were investigated. The results showed that the proportions of inorganic scale and organic scale in the scales by leachate pipe transport were 75.6% and 24.4%, respectively. The crystal composition of the scales was mainly CaCO₃, accompanied by a small amount of NaCl. The scale deposition was positively correlated with temperature, negatively correlated with velocity and scale particle size, while pipe roughness had little effect on the deposition. The scale deposition in the 90° elbow-shaped pipe was larger than that in the straight pipe, and the average deposition rate regarding the straight pipe and 90° elbow pipe was 1.26% and 7.45% by the simulation. The research results can provide insight into the optimal design for the leachate pipe transport system.
- leachate,
- CFD,
- scaling,
- simulation,
- transportation pipe

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References(41)

References

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