Abstract: Absorption process of SO₂ by carbide slag slurry in spray tower was studied in this work.The results show that with increase of SO₂ concentration in flue gas its removal rate is a volcano curve.When pH value changes from 3 to 13，the removal rate of SO₂ goes up from 52.3% to 94.7%.Increasing concentration of carbide slag slurry and decreasing their grain diameter can improve absorption of SO₂. When L/G increases from 10 L·m^-3 to 50 L·m^-3，the removal efficiency puts up by 59.9%，but drops by 14.3% while L/G was continually raised from 50 L·m^-3 to 80 L·m^-3.A mathematics model is built based on the chemical reaction of desulfurization by carbide slag，the overall reaction order n=α+β=1.67，the activation energy E_a=51396.59 J·mol^-1 and the frequency factor k₀=0.37894×10⁶ (mol·m^-3)^-0.67·s^-1.

Key words: carbide slag, slurry, SO₂, kinetics

摘要： 在喷淋吸收装置中对电石渣浆液吸收SO₂进行了系统研究。研究结果表明：脱硫效率随烟气SO₂浓度的增加先升高，然后下降；随体系pH的增加而升高，pH从3升到13时，脱硫效率由52.3%升到94.7%；增加浆液电石渣浓度和减小电石渣粒径均有利于SO₂的吸收去除；液气比从10 L·m^-3增加到50 L·m^-3时，脱硫效率提高了59.9%；以电石渣烟气脱硫的化学反应为基础，建立电石渣烟气脱硫反应动力学模型，总反应级数n=α+β=1.67，反应活化能E_a=51396.59 J·mol^-1，频率因子k₀=0.37894×10⁶(mol·m^-3)^-0.67·s^-1。

关键词: 电石渣, 喷淋吸收, 二氧化硫, 动力学