SO2在多组分悬浮液中的吸收反应特性

The emission of sulfur dioxide in flue gases is an important problem in industry involving combustion of coal. The wet scrubbing process using lime/limestone slurry as the scrubbing medium is currently the dominant technology for the flue gas desulfurization. Due to the presence of numerous ionic and neutral species in the slurry, the chemical reactions involved in the slurry upon absorption of sulfur dioxide are complex. In this paper, a method of measuring the sulfur dioxide absorption in multi-component suspensions was developed and the characteristics of sulfur dioxide absorption were investigated. The results show that different additives chosed in the experiment can improve the ability of SO2 absorption. As to the same additive, the improvement effect is differ with different concentration. For the magnesium hydroxide additive, its optimum concentration is 1×10-4 mol/L. Experiment results suggested that dissolved sulfur dioxide reacts mainly with the magnesium sulfite ion pair which is responsible for the increased absorption rate of SO2. However, when CO2-3 or SO24- anions are present in the solution, the catalytic effect of magnesium hydroxide precipitate on sulfur dioxide absorption reduces. According to the experiments, absorbents with better performance can be optimized to be applied in semi-dry or wet FGD process to raise SO2 removal efficiency.     

液柱冲击式湿法脱硫装置的试验研究

本文提出了一种液柱冲击式湿法脱硫装置,对该装置的吸收段阻力特性和脱硫特性进行了试验研究,对试验结果进行了分析．分析发现了在塔内风速为２ｍ／ｓ～２．９ｍ／ｓ范围内,脱硫效率随塔内风速的增大而增加这一不同于其它装置的特点,得到了在塔内风速 ２．６ ｍ／ｓ,喷液量３０ｍ３／ｈ时脱硫效率高、阻力低这个比较经济的工况点．