The hydro cyclone is a vessel with cylinder part, the cylinder part of upper cone is mud inlet; the outboard install a tangential stock inlet; the under part of cone is open mouth, the size of caliber can be adjustable and for discharging the solid particles. There is a down inserted overflow pipe on the top centre of close vertical cylinder, and extend to below the stock inlet tangent location. Most hydro cyclone without regard to inner diameter of stock inlet, the working performance will be best at the 23m pressured head.
The shell of hydro cyclone can be made of cast iron. The inside can be uses the wear-resisting rubber. For increase the service life further, shells of hydro cyclones use the polyurethane for both wear and corrosion resistance.
In order to make the hydro cyclones to work efficiently, the solid content of the underflow of the preceding equipment or that flows into the inlet of this unit must fit the unit itself. If this condition is agreeable, adjustment of feed rate, feed pressure or replacement of an apex of another size.
When a hydro cyclone works in maximum efficiency, the discharged solids comes out from its underflow apex in a shape of so called “Cone-Spray Discharge”. However cyclone underflow may appear very often as “Rope Discharge” and it means poor cleaning efficiency and it can cause solids overloading of cyclone overflow, apex plugging and aggravated wear of vertex finder, overflow fitting, cone liners and rig pump parts meanwhile discard a big volume of mud. When it happens, the measures to revise it into “Cone-Spray Discharge” are as follows:
(1) Change apex size.
(2) Feed pressure is too low: Increase feed amount
(3) High mud viscosity can be cure by dilution with water.
(4) High mud solid content: Dilute the inlet mud or run a more cyclones.