| Taking the position distribution of the slurry agitator in a wet desulfurization tower of a certain plant as the research object, CFD software was used to simulate the bottom slurry circulation system of the desulfurization tower, and the influence of the stirring effect of the agitator and the suction effect of the circulation pump on the flow field was analyzed, and a non-linear method was proposed. Optimize the structure of the symmetrically arranged mixer and oxidation air duct, simulate the two-phase flow of the optimized design, analyze the velocity and gas distribution of the horizontal and vertical sections of the slurry at the bottom of the tower, and compare the horizontal planes at different heights before and after optimization Average velocity and gas holdup. The simulation results show that the agitator and oxidation air duct outlet at 45° and 135° in the original layout plan are affected by the suction action of the circulation pump, and the overall swirl situation is poor, which is not conducive to the dispersion of oxidation gas. After optimization and improvement, the agitators are located closer to each other, resulting in a stronger joint boosting effect to form a rotating slurry flow, which improves the diffusion capacity of oxidizing gas. After optimization, the average velocity of the liquid phase on the key plane has increased by more than 10%, and the gas content in the reaction zone between calcium sulfite and oxidizing gas has increased by 12% to 28%. |
