Flue Gas Purification Model of a Waste Incinerator with Rotating Spray

A gas-solid-liquid mass transfer model, a chemical reaction model and a slurry droplet model were set up for the deacidification tower with rotating spray in a waste incineration plant to analyze the evaporation and mass transfer processes. The accuracy and reliability of above models were verified by comparing the experimental results with actual operating data. Based on simulation of the internal dynamics in deacidification tower of a certain waste incineration plant, the deacidification efficiency as well as the distributions of pressure, temperature, velocity and acid gas concentration were obtained. Results show that the deacidification reaction mainly occurs in the upper part of central axis in the deacidification tower; some of the droplets that have not evaporated completely are blown to the tower wall due to the influence of flue gas recirculation, leading to the possible risk of slagging and corrosion as well as the increment of thermal stress of tower wall, which is not conducive to the long-term stable operation of the deacidification tower; the slurry droplets evaporate completely in 5 seconds after entering the deacidification tower.