Vegetable oil decanter centrifuge is a representative continuous production of solid-liquid separation equipment. The structure is mainly composed of cylindrical-cone-cylindrical rotary drum and its coaxial screw conveying device. Some are settlement areas, and the conical part is a centrifugal dewatering area. The small cylindrical part with a screen is a filtering area.
When the material flows from the feed pipe of the vegetable oil decanter centrifuge into the feeding chamber of the screw drum, the material is thrown into the drum under the effect of strong centrifugal force, and the ratio of solid particles to water is significant, under the effect of centrifugal force. The solid particles are tightly attached to the wall; the water overflows the overflow above the solids near the centerline.
The vegetable oil decanter centrifuge has an auger in the drum rotating in the same direction as the drum, but at a slightly lower speed, so that the solid particles that have settled on the wall of the drum move toward the cone section under the spiral conveying. When the material passes through the conical section of the drum, it is transported from the bottom of the liquid to the liquid surface and undergoes preliminary dehydration in the cone section, which is a settling process.
After the initial dehydration of the material in the cone section, the material continues to move forward into the screen section under the screw conveying; the remaining liquid in the material is discharged through the screen under the action of centrifugal force to form a filtrate, thereby achieving filtration and dehydration. The solid particles continue to move forward until they are discharged under the action of the screw conveyor.
From the above separation process, it can be seen that the dewatering of the vegetable oil decanter centrifuge has both the features of centrifugal sedimentation and centrifugal filtration, and the equipment has large processing volume, low product moisture content, loose and dry material mixing, small volume and small footprint. Less auxiliary equipment, less power consumption, strong adaptability to materials, moderate cost, high degree of automation, and full automation.