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 Centrifugal Separators for Dirty Gas

Removal of high solids and sludge-like material

 

DT style gas liquid separator

Liquid-soilds centrifugal separator Internals of centrifugal separator used for high solids concentration

Type: Vertical, single stage
Maximum entrained liquid removal: 5-40% of the maximum weight flow capacity
Will it handle "slugs" of liquid well: Yes
Maintenance required: None

 depends upon the specific design

 

A DT style centrifugal separator has a conical bottom to facilitate drainage of high solids, almost sludge-like materials.  Standard separator designs have a dish shaped bottom with the intent of draining mostly fluids that have been separated from the process gas.  When the particulate loading is high and especially if you want to reclaim the particulate due to its inherent value, the conical shaped bottom facilitates complete draining.

 

The underlying separation principal is the same, it differs a little based upon the flow path, but essentially the process gas enters the vessel with an indirect pathway to the outlet nozzle.  The internal piping connected to the outlet nozzle is located in the low velocity section of an internal vortex created by an internal baffle.  The indirect flow path and centrifugal forces propel entrained droplets and particulate to the vessel walls where they coalesce to a common drain.

 

Whereas float style drain traps are used for automatically draining water, oil and other fluids separated, sludgy, high particulate concentrations are likely to clog-up float drain traps.  Thus customers typically use a rotary valve, pinch valve or perhaps even a full port ball ball valve designed for the service conditions to control drainage of the separated material.  Such applications will typically actuate the valves based upon a timer although it is possible to include ports for level measurement for more precise control of drainage rates to minimize process gas loss.  We offer a comprehensive ball valve offering that can be electrically or pneumatically actuated.

 

The liquid removal capacity for the unit illustrated is equivalent to 40% of the separators maximum weight-flow capacity.