Numerical Simulation on Carbonation Reactor of Calcified Residue

This paper aimed at studying the carbonation process — the core process of “Calcification-Carbonation”, and a venturi carbonation reactor to process calcified residue was innovatively designed and produced. The simulated calculations for dynamic characteristics of gas-liquid-solid three-phase flow were discussed under different superficial gas velocities. Results showed: with the increase of gas velocity, gas holdup increased and solid holdup decreased slightly. Fluid turbulence intensity and collision and coalescence of bubbles were enhanced with the increase of gas velocity, which was beneficial to the mass transfer and reaction among gas, liquid and solid. The measured values agreed well with the simulated calculations obtained by CFD, which indicated that it was feasible to use this model to simulate the gas-liquid-solid three-phase flow field in this reactor and the results of numerical simulation were reliable. The above results provided a theoretical basis for the design of the reactor under a high temperature and a high pressure.