Establishment and analysis of denitrification model of multistage high gravity machine based on Fluent

Abstract

Three-dimensional numerical simulation of two-phase flow (H2O2 solution, NO2) was carried out on the packed rotor inside the multistage high gravity machine by using Fluent software. At the same time, the chemical reaction process of H2O2 solution and NO2 was added to realize the simulation of the denitrification process. Orthogonal experiments were designed to study the influence of rotating speed, gas-liquid ratio, temperature, and H2O2 solution concentration on the denitrification efficiency, and the combination of experimental conditions with the best denitrification efficiency was obtained. The simulation results show that the order of effect on removal efficiency is: rotating speed<gas-liquid ratio<temperature<H2O2 concentration; Under ideal conditions, the removal efficiency of NO2 is high when the rotating speed is 900 rpm, the gas-liquid ratio is 10:1, the temperature is 30 ℃, and the concentration of H2O2 is 0.2 mol/L. It provides theoretical data for the practical engineering application of multistage high gravity machine and has guiding significance.