The ideal solution for the clarification of liquids in the food, pharmaceutical, chemical, water treatment sectors…
Horizontal centrifuges are used to separate two or more phases with different specific weight, for the clarification processes of a liquid in which the solids are present in suspension.
The separation of the solid phase from the liquid phase takes place inside a rotating cylindrical/conical bowl. Thanks to the centrifugal force, the solid, heavier phase is deposited on the inner walls of the bowl and is scraped from the internal conveyor, dragged into the conical area and subsequently expelled through the holes placed at the end of the conical section of the bowl.
Often, especially in the purification of liquids, aggregation of the solid phase is facilitated by using appropriately selected polymers according to the type of process. This procedure is not applicable in intermediate processes or in food processes.
The decanting centrifuges operate automaticly and continuously: they must be constantly fed with the solution to be separated, and the discharge (both of the liquid phase and of the dehydrated solid phase) takes place without pauses, through an automated process that does not require the presence of an operator.
The horizontal centrifuges are therefore an excellent alternative to other dehydration systems such as filter presses or belt presses.
Alcuni dei componenti speciali che si possono trovare nelle centrifughe decantatrici
The decanting centrifuges are the ideal tool in various fields:
Food:
The centrifuges developed for this sector are high performance centrifuges that meet the specific requirements of the industry. They have a high production efficiency and constant production quality levels. They can also be set up for the CIP cycle (Cleaning in Place) for complete sanitizing of the machine.
The separation of low density liquids with solids sized from 1 to 10,000 is carried out with an appropriate combination of the cylindrical section configuration, bowl speed, speed and configuration of the conveyor and, finally, the internal level of the liquid.
The horizontal centrifuges are used for the production of all types of fruit juices (grape, apple, lemon, etc.), for the production of tea or coffee, beer and wine.
Here, in detail, the different areas of use:
• in the production of fruit and vegetable juices, the decanter centrifuge succeeds in squeezing the previously ground fruit and vegetables to the highest possible level, obtaining a high yield of juice;
• in the production of soy and rice milk, the decanter centrifuge effectively separates the solids from all the cooking liquid obtaining a product free from impurities;
• in the production of cheese the decanter is used for the thickening and dewatering of the sludge;
• in distilleries, the use of the decanter ensures a really high dry substance content compared to the discharged solid, with a reduction in drying costs;
• in the clarification of the beer, through a centrifugation carried out before the filtering phase, the work carried out by the plant is reduced and it is possible to reduce the consumption of fossil flour at the origin;
• recovery of the grey starch from water used while cutting potatoes.
Waste treatment:
• the decanting centrifuges are used for the purification of water, including wastewater and municipal sludge: through a process of dehydration it is in fact possible to separate liquids from the solid phase obtaining a result of exceptional quality;
• the decanters allow the recovery of the paper: after it has been sent for recycling, a washing and a maceration bath are carried out; once this phase is finished, the liquid is separated from the solid part with a decanter centrifuge and then used as a basic material for the production of recycled paper;
• with the decanting centrifuges it is possible, through appropriate treatments, to recover the biogas produced by the fermentation of the organic fraction of the garbage to produce the biomethane.
Pharmaceutical area:
• the horizontal centrifuges perform a remarkable variety of separation processes with a high quality result, so they are ideal for the production of antibiotics, vitamins, dyes, active ingredients, etc.
Chemical area:
• the models with Espey mechanical seals are able to process suspensions with flammable and / or explosive liquids with ATEX certification, as required for example in the oil field, working in a controlled environment with a nitrogen atmosphere;
• they allow the separation of the Slop Oil and the recovery of the lagoon oils
The horizontal centrifuges allow to work a series of materials in different areas of industrial production.
Here are some examples of the most common use:
• paint sludge: the decanters separate the chromatic pigments from the liquid, allowing it to be recycled
• oily muds: the muds of lagoons and the tanks sludges can be purified by separating the different liquids present with a centrifuge; similar interventions can also be envisaged for refinery residues
• sludge from steel mills: the centrifuges are used for the sludge dehydration deriving from the abatement processes of the powders of the gas produced in the blast furnace, the concentration of sludge deriving from the cold rolling mills and the dehydration of sludge from superficial encrustations of the laminae
• PVC and polyethylene: for the separation of polymers and mother liquor (aqueous suspension PVC, polyethylene of organic solvents)
• rendering: using the centrifuges it is possible to produce animal fats and proteins effectively and with a low cost
• vegetable proteins: decanters have a great importance in the processes for the extraction of vegetable proteins
• fermentation decoctions: here they are used for the separation of biological mass