BATCH HIGH SPEED DISPERSER

Batch dispersers work according to the principle of a rotor-stator-system with a relatively high shear energy.

By the centrifugal forces in the rotor a circulation in the vessel can be achieved. By impact and shear action a strong dispersing effect is reached during the passage through the rotor- stator-area

During dispersing, the product has to pass through the system again and again. This results in very fine suspensions, wet ground products or emulsions.

By an appropriate selection of the energy and dispersing tool the system may be adapted to individual processing steps, viscosity and processing aim.

Controlling the speed by a frequency converter extends the field of applications for different products and volumes. Similar to a fast rotating mixing system, the batch disperser is installed onto the top or in the bottom of a vessel.

Batch dispersers are used for small to medium sized batches.

The limit is reached, when the product in the vessel does not circulate anymore because of the limitation in viscosity and volume.

Viscosity over 3.000 mPas normally can’t be treated economically anymore, in this case an inline dispersing system should be foreseen.

INFORMATION & PRINCIPLE

The combination of a narrow radial gap between rotor and stator and a very high peripheral speed extremely high shear energy is provided. The product passes the gap between the rotor teeth and reaches the shear zone and leaves it through the stator slots. In the range of low to medium viscosity, the machine can pump the product by itself. The geometry of rotor and stator, that are adapted to the processing aim determine the performance of the system.

The product is guided through the rotor-stator-system. The inner shear ring accelerates the product to its maximum, the stator shear ring reduces the speed to almost zero and the next rotor shear ring accelerates the product. This principle reduces particles and/or droplets very effective and distributes them homogeneously in the product.

INFORMATION & PRINCIPLE

Batch dispersing systems are offered in four different sizes with a power from 1,5 kW / 6.000 min-1 up to 45 kW / 1.500 min-1 or 1.000 min-1

The machines are delivered with a mechanical seal systems either in single action or double action execution. When selecting a double action mechanical seal, the system is being cooled and lubricated with a non-pressurised system in-between the product side and the atmospheric side.

A special design of the batch dispersing machine is the installation into the bottom of a tank.

This system is mainly selected in combination with an anchor stirrer and/or other centrically installed stirring elements.

In this case, the disperser handles all dispersing and emulsifying task, while the stirrer takes care for the required circulation in the tank.