| 摘要 |
<p>PURPOSE:To wet-desulfurize waste gas contg. SO2 and HF with lime while maintaining the activity of CaCO3 and a high rate of desulfurization by using CaCO3 and Ca(OH)2 in a specified molar ratio as an absorbent, blowing air into an absorbing soln. and treating the waste gas by absorption. CONSTITUTION:When waste gas contg. SO2 and HF such as waste gas generated by burning coal is treated by absorption, CaCO3 and Ca(OH)2 are used in 0.5-0.99 molar ratio of CaCO3 to CaCO3+Ca(OH)2 as an absorbent and fed into an waste gas treating tower and air is blown into an absorbing soln. By this method, the inhibition of dissolution of CaCO3 due to aluminum fluoride formed by the reaction of Al contained in dust in the waste gas with HF can be prevented, so wet desulfurization with lime can be carried out while maintaining the activity of CaCO3 and a high rate of desulfurization.</p> |
