In view of the desulfurization problem of flue gas containing high SO2 concentration resulting from burning high sulfur coal in flue gas desulfurization process of coal-fired power plants,the research on the high-efficient SO2 removal based onlimestone was carried out by computational fluid dynamics(CFD),and the enhancement method for SO2 removal by installing sieve plate and optimizing the spray system in the absorption tower simultaneously was proposed.A coupled model of SO2 multiform absorption including spray absorption and bubbling absorption was established at the scale of macro scale.Based on the model,the variation laws of pH and SO2 absorption rate during slurry droplets falling were obtained,and the gas-liquid flow,mass transfer and chemical reaction processes in the absorption tower are analyzed.The strengthening mechanism of sieve plate on the desulfurization efficiency is explored,and the optimization for the arrangement of sieve plate and spray system is carried out further.It was found that by optimizing the sieve plate components and the spray system in the tower,the SO2 removal efficiency of the desulfurization tower can be increased by 3%—8%under different working conditions.
关键词
吸收/计算流体力学/优化设计/气-液传质强化/SO2脱除
Key words
absorption/CFD/optimal design/gas-liquid mass transfer enhancement/SO2 removal
维普
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