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Working mode and dehydration principle of centrifugal sludge dewatering machine

Jun 20, 2018

The main reason for using a centrifugal sludge dewatering machine to separate the sludge is to separate the solids from the liquid in the mixture, or to separate the two incompatible and heavy-duty mixtures. The past to achieve this process mainly relied on gravity, but most of today is the use of centrifugal force.


In the past, in a container filled with a mixture of light and heavy liquids and solid particles, due to gravity, delamination occurred after standing for a period of time, and the solid particles with the highest specific gravity would sink to the bottom of the container. At the top is a light phase liquid, with a heavy phase liquid between the two.


However, if the mixed liquid enters the drum of the centrifugal sludge dehydrator and rotates with the drum at a high speed, the stratification process will be accelerated by the centrifugal force field several thousand times faster than that under gravity, usually the separation factor. It is a multiple of gravity acceleration.


At the same time, the proportion of solid particles in the mixed solution of the centrifugal sludge dewatering machine is large, and the centrifugal force is also large. It rapidly settles to the inner wall of the drum, and the liquid is squeezed to the center of the drum. If the liquid has light and heavy two phases, The heavy phase is close to the drum wall and the light phase is near the center of the drum. Since the liquid phase overflow port and the solid cake outlet are provided in the centrifugal sludge dewatering machine, the entire separation process is continuously performed.


At present, centrifugal sludge dewatering machines have been widely used in the sludge dewatering treatment of sewage treatment plants. Although the different specifications or models of different types of centrifugal sludge dewatering machines from different manufacturers have different equipment structures, equipment materials, specifications, and operation adjustment mechanisms, the basic equipment principles are similar.


Centrifugal sludge dewatering machines basically consist of drums, spirals, differential systems, liquid level baffles, drive systems, and control systems. Users only need to use and adjust them properly and perform reasonable maintenance. Unexpected treatment effect.