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Sludge Drain Design Program

This program designs the pipe that will be used for the sedimentation tank sludge drainage. The sludge drain runs along the bottom of the sedimentation tank and collects the flocs as they fall from the lamella.

Sludge Drain Design Algorithm

Sludge Drain Inputs
Sludge Drain Outputs
Sludge Drain AutoCAD Drawing Program

Algorithm

The number of sludge drains is determined by the number of sloped pairs in the sedimentation tanks. This is defined as N.SedSludge, and uses the number of slope pairs calculated in the Sedimentation Inlet Slopes program.

Next, the number of orifices in the pipe can be calculated given the orifice spacing from the Design Assumptions, and the given length of the sedimentation tank from the Sedimentation program.

Unable to find DVI conversion log file.

The initial flow rate through the sludge drain is calculated using values found in the Sedimentation program, and the drainage time for the sedimentation found in the Design Assumptions program.

Unable to find DVI conversion log file.

The diameter of the sludge drain pipe is estimated through an iterative process, using the ND.Manifold equation found in the Fluids Functions program.

The diameter of the pipe is estimated through an iterative process, given the pipe database, the flow rate ratio, Qratio, and the following equation:

Unable to find DVI conversion log file.


Later the head loss in the manifold is determined:

Unable to find DVI conversion log file.


and with it, the diameter of the orifices:

Unable to find DVI conversion log file.

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