亚硫酸钙脱硫法及其机理

A Method of Desulfurization with Calcium Sulfite and It's Mechanism

针对石灰乳直接脱硫存在的结垢问题 ,提出了亚硫酸钙脱硫法 ,并研究了该法的反应机理及主要因素对脱硫率的影响 ,确立了适宜的操作条件 .即在空塔气速 2 75m/s、L/G =3 0L/m3、固含量 6 7%、气温 31℃、进口SO2 初始体积分数 1 50 0× 1 0 - 6、进塔液pH =8 0并维持不变的条件下 ,连续运转中的脱硫率可达 87%。该法从理论上解释、实践上解决了石灰湿法脱硫过程中设备的结垢问题 。

Directing to the scaling problem lying in wet desulfurization with lime slurry, a method of desulfurization with calcium sulfite was proposed. Reaction mechanism and the effects of different conditions on desulfurization efficiency were studied. The optimum conditions were obtained, i.e. air velocity of 2 75m/s in empty tower, L/G=3 0 L/m 3, solid content 6 7%, air temperature 31℃, concentration inlet of SO 2 1500×10 -6 and inlet suspension pH of 80. Under the conditions, the desulfurization efficiency was about 87%. The presented method theoretically and practically solved the scaling problems, which is a novel indirect lime method with Ca contained material as desulfurization agent.