Decanter centrifuge

Working principle and structure

Decanter centrifuges separate solid substances from one or two liquid phases in a continuous process. This is achieved by centrifugal force more than 3,000 times greater than the specific gravity force. The suspension enters the bowl through the feed pipe and the spiral outlet, and under the action of the centrifugal force generated by high-speed rotation, the solid particles with large specific gravity are deposited on the inner wall of the bowl, and the spiral blades that move relative to the bowl continuously scrape off the solid particles deposited on the inner wall of the bowl and push out the slag discharge port. The separated liquid flows out of the bowl through the opening of the weir plate. The relative movement between the spiral and the bowl, i.e. the differential speed, is achieved by means of a differential, which enables a continuous separation process of the centrifuge. The speed of the auger can be automatically adjusted by a variable frequency drive (VFD) to adapt it to different solids contents. Pumping stations are available.

The following key factors determine the performance and quality of a decanter centrifuge: *Centrifugal force required for sedimentation of solid substances. * Clarification settlement area required for separating solid substances. * The differential speed required to send the solid material out of the centrifuge. *The matching accuracy of the bowl and the auger. *Pitch of the auger. * Feed area design. *Design and application of bearing assemblies. * Angle of the dewatering cone. *Inner and outer surfaces of the bowl. *Abrasion resistance of the wear parts. *The material and processing method used in each part of the structural parts. *Design and orchestration of centrifuge operation process.

ECT's unique technology is perfectly reflected in the design The unique multi-stage planetary differential technology, drum slot technology and hollow spiral technology give a strong guarantee for the processing capacity and treatment effect of the equipment ECT bearing technology, optional oil mist lubrication and grease lubrication, drum and screw bearing lubrication are completed outside the hood, bringing convenience of use and guarantee of bearing life ECT's material technology ensures the life and performance of the equipment by the rational application of the main materials and wear-resistant materials of the equipment ECT's sealing technology and the most suitable sealing method for each sealing part, such as equipment housing and bearing. ECT's advanced manufacturing and processing level ensures the ultra-high manufacturing accuracy of the products, so that the successful application of various technologies can be realized

Drums

The assembly of the integral bowl ensures that the drum is highly accurate and error-free

Part I

Screw

Spiral hollow blades make solids drier and clearer liquids.

Part II

Lumen

The inner diameter slot of the drum instead of the welded bar makes the manufacturing accuracy and difficulty extremely high, so that the gap between the spiral and the drum is very small, the dehydration effect is improved, and the service life of the equipment is greatly improved.

Part III

Solid outlet

The solid outlet is inlaid with replaceable cemented carbide, which is fastened and durable and has a long service life.

Part IV

Seal

The sealing surface between the cover and the drum is labyrinth sealed, and the matching accuracy between the cover and the drum is extremely high, which can completely eliminate the wear and scrap of the drum caused by the accumulation of materials inside the shell.

Part V