Desanders are used to remove suspended solids from liquid process streams. One of the primary applications is to improve the quality of waste water. Treatment of waste water normally involves multiple process steps to remove the impurities and ensure that the final effluent discharge is compliant to regulatory specifications.

Desander cones

A desander has an entry port near the top on the side of the vessel, a hydrocyclone central component, and two discharge points (one on the top of the vessel and one on the bottom). The hydrocyclone is oriented so that the wide opening is at the top and the narrow opening at the bottom.


Hydrocyclones are designed according to the efficiency of solids removal required and the flow rate of the product stream. A typical waste water desander will remove particles with a mean of up to 10 microns. Any flow rate can be accommodated by appropriate sizing of the hydrocyclone design.

Waste water screens are sometimes used upstream of desanders to remove large items such as rags and bolts, and protect the cyclones from damage. A desander can operate for up to 10 years if properly protected and maintained.

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