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decanter centrifuges

Decanter centrifuges are used to separate two or more phases with different specific weight, i.e. to clarify liquids containing suspended solids. The solids are separated from the liquids inside a cylindrical or truncated-cone shaped rotating drum. The heavier solid phase is deposited on the walls of the drum and scraped off by the conveyor until it is expelled through the ports at the end of the conical trunk section.

Polymers are often used to facilitate the aggregation of the solid, especially for purification, and they are especially selected depending on the kind of process. This procedure does not apply to intermediate transformation processes or alimentary processes.
In this kind of centrifuge, both the feeding of the suspension to be treated and the discharge of the liquid and the dewatered solid are continuous and automatic and therefore does not require constant supervision.

Decanter centrifuges are the best alternative to other dewatering systems, such as chamber filter presses and belt filter presses.

Decanters also have the following advantages:

  • continuous process
  • no emission of odours
  • high reliability and high level of safety
  • low control costs (thanks to automatic operation)
  • reduced installation space
  • advantageous maintenance intervals.

Decanter centrifuges cover a very wide RANGE OF USES, such as:

Beer clarification: centrifuging prior to filtration takes the pressure off the filtering system and reduces the consumption of fossil flour
Fruit juices: crushed fruit can be squeezed by the centrifuges to obtain a higher yield of juice.
Vegetable juices : similarly to fruit, centrifuges can be used to extract juices from vegetables such as carrots and tomatoes.
Rice milk: centrifuges are used to separate the rice from the milk it is cooked in, thereby obtaining a pure product.
Recycling of synthetic materials : centrifuges are used to recycle washing water and recover paper.
Thickening and dewatering of municipal waste : decanters are used to treat waste water.
In distilleries: the use of centrifuges in distilleries achieves particularly high amounts of dry substances in the discharged solid, thereby reducing drying costs.
In the dairy sector: food-safe versions of centrifuges can be used for chemical washing, and thickening and dewatering sludge.
Chemicals/pharmaceuticals: centrifuges are a perfect solution to a wide variety of separation processes (antibiotics, vitamins, dyes, active ingredients, etc.).

Our company has the know-out to produce centrifuge with gas seals Atex-certified and carried out with special steels. Suitable to be used in the pharmaceutical, chemical and petroleum production processes, these centrifuges can process suspensions with flammable liquids and/or explosives working environment controlled with nitrogen atmosphere. They are also equipped with Espey seals and the type of seals and O-ring used are chosen to be compatible with the process.

In all these processes, many SUBSTANCES can be treated with decanter centrifuges.
Vegetable proteins: decanters are very important in vegetable protein extraction processes.
PVC and polyethylene : to separate polymers from mother Liquor (PVC from water-based suspension, polyethylene from organic solvents).
Painting sludge : decanters can separate the colour pigments from the water or solvent, thereby allowing the liquid to be recycled.
Oily sludge: decanters are used to treat and recover petrol from lagoon sludge, from the bottoms of tanks and from refinery oil residues.
Steelworks sludge : centrifuges are used to dewater the sludge deriving from the abatement of the gas powders produced in the blast furnace, to thicken sludge deriving from cold rolling mills and dewatering surface sludge on sheet steel
Slaughterhouse and rendering industry : centrifuges allow the efficient and cost-effective recovery of fat and animal protein.
Fermentation broth : here they are used to separate the biomass.

Decanter System s.r.l. - Via Leonardo da Vinci, 8 - 20876 Ornago (MB)
Tel. +39.039.6010051 - Fax +39.039.6919298 - E-mail: info@decantersystem.com