How Does Horizontal Decanter Centrifuge Work?

A horizontal decanter centrifuge is a robust piece of equipment widely used for the continuous separation of solids from liquids in various industries. The process relies on centrifugal force to achieve efficient separation. Here’s a detailed breakdown of how a horizontal decanter centrifuge processes materials:

1. Feeding

   • The slurry is continuously fed into the centrifuge through the feed inlet.

2. Acceleration

   • The feed enters the rotating bowl and is rapidly accelerated to the rotational speed of the bowl.

3. Separation by Centrifugal Force

   • Solids Separation: The centrifugal force pushes the denser solid particles outward against the bowl’s wall.
   • Liquid Separation: The less dense liquid phase forms an inner layer closer to the center of the bowl.

4. Conveying Solids

   • The scroll, rotating at a slightly different speed than the bowl, conveys the separated solids towards the conical end of the bowl.
   • The differential speed between the bowl and the scroll determines the residence time of the solids in the bowl, affecting the degree of dryness of the discharged solids.

5. Discharging Solids

   • The compacted solids are discharged through the solids discharge ports at the conical end of the bowl.
   • These solids are typically in the form of a dry cake or slurry, depending on the process parameters and material properties.

6. Discharging Liquids

   • The clarified liquid phase (supernatant) flows towards the liquid discharge ports at the opposite end of the bowl.
   • The liquid is continuously discharged, usually collected for further processing or disposal.

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