Hydrodynamic disperser and its types

GlobeCore develops and manufactures state of the art extra-heavy duty colloid mills for production of bitumen emulsions and other dispersion systems.


CLM – 22 Colloid mill    

The main component of a colloid mill is the disperser, which facilitates creation of a highly stable disperser system by mechanical destruction or emulsification of raw material with subsequent homogenization.

There are several types of dispersion mechanisms, which vary in their influence on the raw material. One of the most widely used dispersion methods is cavitation – the process of steam bubble formation in a liquid flow, forming due to reduction of pressure below a certain critical level. This effect can be reached by either hydraulic shocks or ultrasonic impulses.

Hydraulic impact on the material is provided by hydrodynamic disperser (DG). The main factor of dispersion in hydraulic processing is the process of cavitation, which occurs with the alternating pressure. Pressure drops in the process of hydrodynamic cavitation due to acceleration of pumped flow of liquid. A quite significant factor in dispersion of source material is the interaction of shock waves and collisions of solid dispersion phase particles. The hydrodynamic processing is done by one of the three methods: hydraulic, hydroacoustic or electrohydraulic.

There are several types of dispersers, with the following primary modifications: DG-2, DG-40, DGS-40-20.

Hydrodynamic dispersers (DG-2, DG-40) are designed for production of highly dispersed drilling fluids and are widely used in construction and repairs of oil and gas wells (e.g. well control liquid production to create counterpressure in the well). A hydrodynamic disperser has several advantages: economical consumption of raw material and chemical agents, reduction of time and labor costs, high quality of produced emulsions and solutions.

A disperser of special type – stream hydrodynamic disperser DGS-40-20 is a device, where atomization of solid materials and emulsification of liquid occurs by colliding two liquid streams.