Disc Centrifuge for Mineral Oil Treatment

Mineral oils include light and heavy fuel oils, lubricants, cooling oils, and other hydrocarbon-based mineral substances. These oils can float on the water surface, interfering with oxygen exchange between air and water, or become dispersed in water by adhering to suspended particles or forming emulsions. Once in the water, these oils can be oxidized and decomposed by microorganisms, consuming dissolved oxygen and degrading overall water quality. To address this issue, a disc stack centrifuge can be used for efficient separation and clarification.

Mineral oils are insoluble in water and ethanol, but soluble in volatile oils. They are generally stable under exposure to light, heat, and acid. However, prolonged exposure to light and heat may lead to oxidation. The disc stack centrifuge belongs to the category of sedimentation-type centrifuges and is highly effective in separating challenging mixtures, such as viscous liquids with fine solid particles or emulsions composed of liquids with similar densities. As a result, it is one of the most widely used separation devices in industrial processes.

The disc stack centrifuge features a rotating drum equipped with a stack of conical discs. Through centrifugal sedimentation, it separates emulsions and low-concentration suspensions. Material enters the drum through a central inlet pipe, flows to the base of the bowl, and is directed outward by the distribution holes beneath the disc stack. Under centrifugal force, heavier solid particles settle on the drum wall to form sludge. The lighter liquid phase moves along the outer surface of the conical discs toward the center and is discharged via the centripetal pump at the top through the light-phase outlet. Meanwhile, the heavier liquid phase flows along the inner surface of the conical discs toward the wall and exits via the heavy-phase centripetal pump.

Before use, all components of the disc centrifuge should be inspected and adjusted by trained personnel. Only after confirming that the equipment is in proper working condition should material separation begin, ensuring safety and stable operation while avoiding process interruptions or equipment malfunction.

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