过氧化氢脱硫工艺技术的研究

以过氧化氢为原料脱除硫酸尾气中的二氧化硫,研究过氧化氢浓度、反应温度、反应时间对脱硫率的影响,且对反应过程中过氧化氢的分解率进行了检测。实验结果表明:过氧化氢不足量时脱硫率随过氧化氢浓度的增加而增加,过氧化氢足量时过氧化氢浓度的改变对脱硫率影响不大;在实验条件下,过氧化氢分解率较低;反应温度对脱硫率影响不明显;在SO_2进气质量浓度为4 050 mg/m~3、进气量为0.25 m~3/h的条件下,最佳工艺条件为w(H_2O_2)0.25%、反应温度70℃、反应时间1 h,此条件下脱硫率为98%。

Study on desulfurization technology with hydrogen peroxide

Hydrogen peroxide is used as raw material to remove sulfur dioxide from tail gas of sulfuric acid plant,the effects of hydrogen peroxide concentration,reaction temperature and reaction time on desulfurization rate are studied.And the decomposition rate of hydrogen peroxide in the reaction process is detected.The results show that:when hydrogen peroxide is insufficient,the desulfurization rate is increased with the increase of concentration of hydrogen peroxide;When hydrogen peroxide is enough,the change of hydrogen peroxide concentration has little effect on the desulfurization rate.Under experimental conditions,the decomposition rate of hydrogen peroxide is low,and the effect of reaction temperature on the desulfurization rate is not obvious;When the amount of entering gas is 0.25 m3/h,and the concentration of SO2 is 4 050 mg/m3,the optimum conditions are the concentration of hydrogen peroxide of 0.25％,the reaction temperature of 70 ℃,the reaction time of 1 h,the desulfurization rate is 98％under these conditions.