次氯酸钙溶液的脱硫脱硝特性

采用Ca(ClO)2溶液在高效反应瓶中与模拟烟气进行脱硫脱硝实验,考察了模拟烟气中SO2和NOx的去除效果,以动力学为理论基础研究了Ca(ClO)2的脱硫脱硝性能。实验结果表明:在模拟烟气中SO2,NO,NO2的质量浓度分别为3700,1300,820 mg/m^3及Ca(ClO)2溶液浓度为0.35 mol/L的条件下,SO2去除率达到100%,NOx去除率达到67%。脱硫过程中吸收液中的ClO-是100%脱硫率的保障。Ca^2+吸收SO2的反应速率呈现一级反应的特征。得到的脱硫产物CaSO4·2H2O达到了工业石膏的品质要求。同时脱硫脱硝时NOx和SO2具有协同作用。

Desulfurization and denitrification characteristic of calcium hypochlorite solution

The desulfurization and denitrification experiments were carried out using Ca（ClO）₂ solution with simulated flue gas in a high efficiency reaction bottle. The removal rates of SO₂ and NO_x in simulated flue gas were investigated. The desulfurization and denitrification capability of Ca（ClO）₂ was studied on the basis of kinetics theory. The experimental results show that under the conditions of SO₂,NO,NO₂ mass concentration 3 700,1 300,820 mg/m³ respectively and Ca（ClO）₂ concentration 0.35 mol/L,the removal rate of SO₂ and NO_x can reach 100% and 67%. In the desulfurization process,ClO^- in the absorbent solution during the desulfurization process is a guarantee of 100% desulfurization rate. The absorbing reaction rate of Ca²⁺ to SO₂ presents the characteristics of first-order reaction. The quality of the desulfurization product CaSO₄·2H₂O obtained has reached the industrial level. NO_x and SO₂ have a synergistic effect in simultaneous desulfurization and denitrification.