In order to mininiize the absorber’s volume, the research deals with the development of a wet-dry treatment device for acid flue gases (SO2 in air) constituted by a high energy venturi. An experimental comparison between the three apparatus studied allows, according to identified experimental parameters, to choose the device, called C, where the evaporation and the sulfur dioxide absorption efficiencies are clearly greater than those obtained with the other two devices. Then, for this device, we specify the optimum geometrical and experimental conditions. The sulfur dioxide is absorbed by a NaOH solution or a Ca(OH)2 SlUrry. With a basic slurry of Ca(OH)2, the results obtained are better than those found in the literature, dealing with the more conventional devices constituted by a spray dryer.