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Decanter inlet channels

Input data

Total inlet flow

ϕ

θ

Output data

Head loss

Outlet flow

Description

Given the dimensions of various sections of an inlet channel for decanters and their distribution gates, this calculation determines the flow rates distributed to each gate and the head loss between the channel and the decanter.

To perform this calculation, the parameters θ\theta and ϕ\phi must be selected. The corresponding values are as follows:

  • Long connection (connection length significantly greater than three times its diameter):
    θ=0.4\theta = 0.4
    ϕ=0.90\phi = 0.90

  • Short connection (connection length less than three times its diameter; common case):
    θ=0.7\theta = 0.7
    ϕ=1.67\phi = 1.67

Failed to load imageDecanter

Input Data

Parameter
Default Units
Description
Total inlet flow (QQ)
L/sL/s
Total flow entering the system.
Access gates areas
m2m^2
Area of each lateral gate.
Access channel areas
m2m^2
Area of each channel section.
ϕ\phi
dimensionless
Factor related to the connection.
θ\theta
dimensionless
Factor related to the connection.

Output Data

Parameter
Default Units
Description
Head loss (hfh_f)
mm
Head loss at each gate.
Outlet flow (QoutQ_{out})
m3/sm^3/s
Flow distributed to each gate.

References

  • Benefield, L. D. et al (1984). Treatment plant hydraulics for environmental engineers. New Jersey, Prentice-Hall. 231 p.