Reduction of energy consumption in gas-liquid mixture production using a membrane diffuser and HE-3X stirrer
[ 1 ] Instytut Technologii i Inżynierii Chemicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ P ] employee
2018
chapter in monograph / paper
english
EN Mechanical mixing of liquids in the presence of gas is used when it is necessary to exchange mass between the liquid and gas phase whose special case is aeration of liquid. Mixing of liquid-gas multiphase systems has been widely used in industrial absorption (purely physical and with chemical reaction) processes of hardly soluble gases and biochemical engineering. The rate of liquid mass transfer limits the whole process. By increasing the surface of the interphase contact and splitting large gas bubbles into finer ones, it is possible to significantly intensify the process. In this case, the barbotage itself is insufficient and the mechanical stirring apart from the increase in the interphase contact area and the shorter restoration time of the limiting layer, is responsible for even circulation throughout the apparatus. For this purpose, the modernization of the process has been introduced by introducing a membrane diffuser into the test apparatus, which is used to efficiently introduce the gas into the mixer and to guarantee the maximum dispersion of the air bubbles at low volume flow rates. In addition, the mixer is fitted with a modified HE-3X stirrer which is to increase the residence time of the air bubbles and reduce the energy consumption for creation of gas-liquid mixture.
423 - 436
20
WoS (15)