Gas/Liquid Mixing Turbines and Submerged Aerators

FRINGS gas/liquid mixing turbines and submerged aerators (which work according the same principle) are high-performance systems for the optimal transfer of gases in the liquid phase in chemical reactors, bioreactors and other gas/liquid units. In particular, these systems are designed for chemical gas/liquid reactions in the low-viscosity range and to supply oxygen to bacteria and yeast cultures.  

The transfer of gas into the liquid is often the rate limiting step for the productivity of gas/liquid reactions. With the FRINGS high-performance aerators, it is possible to increase the speed of this mass transfer in comparison with other gas transfer and mixing systems. For chemical reactions, this means an increase in the reaction speed. For microbial mass reactions, this means an increased growth and product formation rate. 

Our gas liquid mixing turbines and submerged aerators are outstanding due to the feature of automatically aspirating gas (which means that the need of a gas compressor unit can be avoided in many cases) and make it possible to design a system with minimal installation expense. However, if a compressor is additionally installed and regulated suitably with our control units, the most efficient systems with very low specific energy consumption are produced. 

The functional principle: 

In the hydraulic part of the turbine on the bottom of the tank, the star-shaped rotor draws in liquid axially and accelerates it onto the working surfaces radially and tangentially. During rotation, an area of partial vacuum is created on the rear side of the working surfaces that are connected to the gas main. Because of the difference in pressure in relation to the gas main, gas flows out into the rotor's working area and is mixed intensively with the liquid. The liquid/gas mixture is conveyed to the channels of the stator. The mixture flows out at the channels, the length and geometry of which depend on the diameter of the tank.