基于臭氧氧化的喷淋散射塔氨法脱硝的模拟研究

Simulated Study on Ammonia Reduction Denitration by Spray Scattering Tower Based on Ozone Oxidation

采用数值方法对基于臭氧氧化的喷淋散射塔氨法脱硝过程进行了模拟研究,考证了其内部气液两相流动、热质传递和脱硝过程,并用示范装置结果进行了验证。考察了不同O3/NO摩尔比对NO氧化率的影响,研究了不同液气比,O3/NO摩尔比,烟气流量和浸没深度对脱硝效果的影响。结果表明:液气比,O3/NO摩尔比,浸没深度增大有利于脱硝,烟气流量越大则脱硝率降低。

The ammonia reduction denitration process by the spray scattering tower based on ozone oxidation was simulated in this work.The two-phase flow of gas-liquid,the heat and mass transfer and the denitration process were obtained by simulation.The simulation results were verified by the demonstration device.The influence of the O3/NO molar ratio on the NO oxidation rate was investigated.The influences of the liquid-gas volume ratio,the O3/NO molar ratio,the flue gas flow and the immersion depth on the denitration effect were also studied.The results showed that the denitration rate increased with the increasing of the liquid-gas volume ratio,the O3/NO molar ratio and the immersion depth.While the denitration rate decreased with the increasing of the flue gas flow.