Generally speaking, decanter centrifuge plays a role in separating solids from liquids. Alfa Laval decanter centrifuge is one of the best sold centrifuges in the world, especially in South America. The other brands in South America market including Derrick, MI-Swaco, NOV, Derrick, GN, etc. GN solids control is new brand player in the market, but fast developing.
A decanter centrifuge separates solids from one or two liquid phases in one single continuous process. This is done using centrifugal forces that can be well beyond 3000 times greater than gravity.
When subject to such forces, the denser solid particles are pressed outwards against the rotating bowl wall, while the less dense liquid phase forms a concentric inner layer. Different dam plates are used to vary the depth of the liquid – the so-called pond – as required.
The sediment formed by the solid particles is continuously removed by the screw conveyor, which rotates at a different speed than the bowl. As a result, the solids are gradually “ploughed” out of the pond and up the conical “beach”.
The centrifugal force compacts the solids and expels the surplus liquid. The dried solids then discharge from the bowl. The clarified liquid phase or phases overflow the dam plates situated at the opposite end of the bowl. Baffles within the centrifuge casing direct the separated phases into the correct flow path and prevent any risk of cross-contamination. The speed of the screw conveyor may be automatically adjusted by use of the variable frequency drive (VFD) in order to adjust to variation in the solids load.
Recently GN sold another set of decanter centrifuge to Ecuador by air. Usually it is difficult to ship the large equipment by air. GN can provide clients for complete service including shipment or recommend some good freight forwarder with rich experience for the large equipments. The limit dimension of GN decanter centrifuge model GLW355x1250N in transportation is 3x2x1.47m, which is accepted by air freight company, and we can provide package service for client’s requirement.
