| 摘要 |
<p>PURPOSE:To desulfurize in an adsorption tower at a temp. below the dew point of the acid by adsorbing and removing previously SO3 in a desulfurizing method of waste gas contg. sulfur oxides. CONSTITUTION:Powdery activated carbon is blown into waste gas in a SO3 remover 3 to adsorb and remove SO3, and the waste gas removed from SO3 is supplied into an adsorption tower 5 wherein a carbonaceous material is packed and moved and desulfurized. Namely, since SO3 is adsorbed and removed by blowing in powdery activated carbon before the waste gas is introduced into the adsorption tower 5, the SO3 concn. in the waste gas introduced into the adsorption tower 5 is decreased. Consequently, sulfuric acid is not formed due to the dew point of the acid in the adsorption tower 5 even at low temps. and the desulfurization efficiency is also improved.</p> |
