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Determining the Effective Length of Gravitational Settler Chambers

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Power Technology and Engineering Aims and scope

Two methods developed by the author are examined for determining the effective length of gravitational settler chambers. One method is based on a normal distribution of settling sediment particles that are uniform (in terms of hydraulic size). This is a layered calculation method. The second method is based on a log-normal distribution of the entire population of hazardous sediment particles entering the settler along the entire flow depth. An example calculation is presented, in which the population of hazardous particles is broken down in to 17 groups (fractions). In the layered calculation method, the flow depth at the chamber entrance is broken down into 20 elemental layers. It is determined that the chamber length obtained using the layered calculation method is greater, and so it is recommended that chamber length be determined using the layered calculation method during the final phase of settler design.

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References

  1. I. E. Mikhailov, “Determination of the effective length of settlers in hydroelectric plants,” Gidrotekh. Stroit., No. 6, 28 – 31 (1973).

  2. I. E. Mikhailov, “Distribution of homogeneous particles on the bottom due to settlement in a uniform low-velocity turbulent flow,” Gidrotekh. Stroit., No. 11, 19 – 24 (2004).

  3. I. E. Mikhailov, “Trajectory and length of sedimentation path of suspended solids in desilting basins with different bottom slopes,” Gidrotekh. Stroit., No. 1, 28 – 32 (2002).

  4. I. E. Mikhailov, “Distribution of homogeneous particles on the bottom of a desilting basin due to settling in a nonuniform lowvelocity turbulent flow,” Gidrotekh. Stroit., No. 2, 30 – 35 (2005).

  5. I. E. Mikhailov, “Design of settling basins with periodic flushing of detritus,” Gidrotekh. Stroit., No. 5, 22 – 28 (2005).

  6. I. E. Mikhailov, “Bottom distribution of settled suspended particles on entering a gravitational basin over the entire depth of flow,” Gidrotekh. Stroit., No. 2, 33 – 39 (2007).

  7. I. E. Mikhailov, “Logarithmic normal distribution parameters for settled suspended particles as applied to HPP settling basins, irrigation systems, water supply, and water disposal,” Gidrotekh. Stroit., No. 7, 37 – 43 (2008).

  8. I. E. Mikhailov, “Probabilistic approach to determination of the dimensions of gravitational settling basins,” Gidrotekh. Stroit., No. 5, 29 – 40 (2009).

  9. I. E. Mikhailov, “Bottom distribution of settled suspended particles on entering a gravitational basin over the entire depth of flow,” Gidrotekh. Stroit., No. 2, 33 – 39 (2007).

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Authors and Affiliations

  1. Moscow State University of Civil Engineering, Moscow, Russia

    I. E. Mikhailov

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  1. I. E. Mikhailov
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Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 6, June 2015, pp. 57 – 60.

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Mikhailov, I.E. Determining the Effective Length of Gravitational Settler Chambers. Power Technol Eng 49, 274–277 (2015). https://doi.org/10.1007/s10749-015-0613-3

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  • DOI: https://doi.org/10.1007/s10749-015-0613-3

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