Study on properties of MNBS and characteristics of gas-liquid two-phase flow field based on MNBS

In this article, the properties of the micro and nanobubbles (MNBs) generated by the micro and nanobubble generator (MNBG) based on the shear method, including size and distribution, existence form and motion state, hydroxyl radicals (∙ OH) generation and oxygen-dissolving capacity, were studied and numerical simulation was used to study the characteristics of the gas-liquid two-phase flow field based on the MNBs. The results showed that the MNBG generated quite a few MNBs below 100 μm, of which more than 50% were 46 μm, and in the micro and nanobubble gas-liquid dispersion system (MNBGLS) generated by the MNBG, a large amount of ∙ OH was produced and the concentration of dissolved oxygen was higher. Moreover, the existence of a high gas-liquid dispersion interface was confirmed. According to the analysis of pressure field, velocity field and gas phase distribution in the calculation domain of the gas-liquid two-phase flow fluidized bed based on the MNBs, the simulation results were consistent with the actual operation results.