Evaluation of the efficiency of liquid degassing technology based on the principle of hydrodynamic cavitation

Abstract

The article presents data on the evaluation of the effectiveness of liquid degassing in the conditions of hydrodynamic cavitation, which is implemented in a Venturi tube. Based on the conducted experimental studies and the obtained data on the change in pH of the liquid, a change in the carbonic acid-dissolved gas balance was observed. In the terms of the single bubble dynamics model, the potential different sizes growth of gas microbubbles of under pressure relief conditions for two treatment modes is determined. It was found that increasing the efficiency of degassing causes the pressure in the cavitator to decrease to the maximum possible negative pressure. This allows the growth of the smallest bubbles to be activated in the degasser equipment. It is shown that the theoretical assessment of the potential effectiveness of cavitation degassing is somewhat overestimated. This is explained by the difference in calculated pressure values and actually created pressures in the degassing equipment. Correlation of theoretical calculations of cavitation efficiency based on experimental data showed that in the proposed treatment modes it is possible to activate bubbles from 1.5 to 3.0 μm, which also ensures a high degree of degassing.

Keywords

• degassing
• hydrodynamic cavitation
• cavitation bubble
• gas content
• venturi tube
• ph