centrifuge equipmnt

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Wel Come

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Centrifuge Equipments Vishwanath Suryawanshi Roll no- 10AG63R23

Centrifuges:

Centrifuges Centrifuges are equipment, used to separate different products or material in a liquid. They separate using centrifugal force, and can separate a liquid from a solid, or two liquids of different densities. A key role in many industrial processes

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The centrifugal separation is similar in principle to that achieved in a gravity separation process. The driving force is higher because is resulting from the rotation of the liquid: in the case of sedimentation, where the driving force is resulting from the difference in density between the solids particles and the liquid, the separation is achieved with a force from 1000 to 20000 times that of gravity. Principle

Types of centrifuges:

Types of centrifuges Basket centrifuges Disc centrifuges Tubular centrifuges i) Supercentrifuge ii) ultracentrifuge 4) Pusher type centrifuges 5) Valve nozzle centrifuges

Basket centrifuges:

Basket centrifuges In basket centrifuge, the solids & liquids are separated by centrifugal force using a filter media (usually a cloth) mounted over supporting mesh, which are together supported inside the rotating basket. The slurry to be filtered is fed through the feed nozzles to the basket and due to centrifugal force the liquid is forced out through the filter media while solids are retained within the filter media inside the basket.

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These solids then separated or discharged by scrapper, operated manually pneumatically or hydraulically.

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Basket centrifuges

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By inserting special plates (disc) in centrifuge, maximum separation efficiency is increased. A disc centrifuge separates solids and one or two liquid phases from each other in a continuous process. The denser solids are forced outwards by centrifugal forces while the less dense liquid phases form inner concentric layers. Disc centrifuge

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The solids can be removed manually or mechanically depending on the specific application. The clarified liquids overflow in the outlet area on top of the bowl into separate chambers For special applications where three phases, with minimum density differences are to be separated, disc centrifuges are ideal.

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Disc centrifuge

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Tubular centrifuges Tubular supercentrifuges The bowl has tall and narrow diameter about 100 to150 mm Develop a force about 13000 times the force of gravity Tabular ultracentrifuges The bowl has tall and narrow diameter upto 75 mm and a very high speed of 60000 rev/min Produced force of as much as 500,000 times the force of gravity.

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this centrifuge was used for separating 2 phase liquid/liquid, liquid/solids having very low solids content and also 3 phase liquid/liquid/solids again having very low solids The bowl is suspended from a spindle shaft that couples to the neck of the bowl. The bowl is driven by an electric motor 2-5 hp depending on the size and model. The centrifuge bowl is brought up to speed. Then the feed is introduced through a feed nozzle into the bottom of the bowl.

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As the product is separated, the solids are slung to the side wall of bowl, while the liquid phases are force upward and out discharge ports in the top of the bowl and into the cover assembly for distribution. At the end of the cycle, the bowl is disassembled to removes solids and clean. use Commonly used for vegetable oil and water, Hydraulic, Diesel fuel, Diesel lubricating, heavy fuel, Turbine lubricating, Transformer, Cutting and Grinding oils, and Printing ink.

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Pusher centrifuge This type of centrifuge is used for separation of suspensions This is fitted either with a perforated or imperforated basket The product is feed into the basket area known as the “feed cone”. As the product is separated, the solids are slung to the side wall of basket

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while the liquid passes through holes in the basket or in case of imperforated basket, is taken away through an overflow The solids are moved along the surface of basket by means of reciprocating pusher Pusher comes forward and returns immediately Then the solid are washed by means of spray

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Valve Nozzle centrifuges Valve nozzle centrifuges is a simple bowl or disc centrifuge with a valve nozzles. Suitable for applications where a solid is to be separated from liquid or there are two liquid containing suspended solids. Continuous removal of solids from centrifuges, basket can be effected by fitting a number of discharge nozzles around the periphery of the basket The centrifuge is operated in such a way that solids are ejected with sufficient liquid to enable them to flow Valve may be actuated automatically according to the level of solids which have build up

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Valve are in closed position- solids are built up around the discharge valve port

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Valves are in open position- Solids have built up to pre-determined point

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Closing the valve before all solids have been discharged

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use Valve nozzle centrifuges are used in the processing of yeast, starch, meat, fish product and fruit juices.

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