超重力强化H_2O_2-Na OH复合吸收液脱硝

Denitration with H_2O_2-Na OH compound absorption liquid in rotating packed bed

在旋转填充床中进行H_2O_2-NaOH复合吸收液脱硝的实验研究。考察了旋转填充床的转速、气液比、吸收液的浓度和组分以及循环时间等因素对脱硝率的影响,并检测了吸收产物。结果表明:脱硝率随旋转填充床的转速、吸收液的浓度和组分的提高而增大;随气液比、循环时间的增大而降低。最佳的反应参数为旋转床转速1 000 r·min^(-1),气液比10:1,复合吸收液浓度0.04 mol·L^(-1)NaOH和0.2 mol·L-1H_2O_2,NO_x的脱除率为92%。在循环使用510 min内,脱硝率保持在88%以上,吸收产物为含NO_2^-和NO_3^-离子的溶液。

Denitration with H2O2-NaOH compound absorption liquid in rotating packed bed（RPB） was investigated in this study. Rotating speed of RPB, gas-liquid ratio, concentration of H2O2 and NaOH, cycle time of compound absorption liquid, as well as relationship between cycle time and ion concentration were comprehensively studied respectively. The results showed that denitration efficiency increased with the increasing of rotating speed of RPB and concentration of compound absorption liquid, but it decreased with the increasing of gas-liquid ratio and cycle time of component absorption liquid. Denitration efficiency achieved 92% under the optimum conditions of 1 000 r·min^（-1） rotating speed, 10：1 gas liquid ratio and 0.04 mol·L^（-1） NaOH and 0.2 mol·L-1 H2O2. Moreover, denitration efficiency was still as high as 88% even the cycle time was up to 510 min and both NO2^- and NO3^- ions were detected in the absorption product.