【摘要】 于五口烧瓶中研究了设计铝量30g/L、碱度30%的碱式硫酸铝溶液在5次循环吸收解吸实验内,溶液中SO2-4、SO2-3浓度、pH值以及吸收率随循环吸收次数的变化规律,同时探讨了碱式硫酸铝再生法循环吸收SO2的影响因素。研究结果表明,在反应最初的10s内,经过5次循环实验,碱式硫酸铝对SO2的短时吸收率仍大于95%。SO2吸收率随吸收液SO2-3、SO2-4初始浓度的增大而减小,随着pH值的升高而增大,当SO2-3、SO2-4初始浓度、pH值分别在0~0.023mol/L、0.60~0.67mol/L、3.51~3.62的范围内时,吸收率可维持在95%以上。更多还原

【Abstract】 Five cycles of SO2absorption and desorption experiments were performed,using basic aluminum sulfate solution with design aluminum content and alkalinity of 30g/L and 30%,respectively.The variations of such parameters as SO42-concentration,SO32-concentration,pH value and absorption rate of basic aluminum sulfate solution against the absorption cycle frequency were investigated.Moreover,factors affecting the SO2cyclic absorption performance using basic aluminum sulfate regeneration method were discussed.The results show that,within the initial ten seconds,after five cycles’ absorption,the short-time absorption rate of basic aluminum sulfate to SO2was still able to achieve more than 95%.The absorption rate decreased with an increase in initial concentration of SO32-and SO42-,and increased with the pH value.When the initial concentration of SO32-and SO42-,and the pH value was within range of 0-0.023mol/L,0.60-0.67mol/L,and 3.51-3.62,respectively,the absorption rate can maintain at 95% or higher.更多还原