Abstract: A method for treating waste gas containing acid and/or base, employing fine spray-scrubbing technology for treating the waste gas mentioned above, wherein the scrubbing solution is atomized to generate mists with droplet size of 1 to 100 ?m. Another feature of the present invention is to combine the application of surfactant in wet scrubbing technology for treating waste gas containing acids, bases, or both, especially, in a low concentration. Another feature of the present invention is to combine spray tower and/or packed tower and/or other scrubbers vertically/horizontally to get enhanced performance of the conventional control systems.

Abstract: According to a generator for producing a narrowly size-distributed aerosol, the solution is atomized into the first droplets including a predetermined small-sized range of droplets by the atomizer, and then using the droplet depositor, the larger droplets from the predetermined small-sized range of droplets are deposited in the first droplets, and wherein the second droplets are formed from the first droplets, and then a particulate screening and separating device is used to extract the third droplets smaller than the predetermined small-sized range of droplets within the second droplets, and the predetermined small-sized range of droplets can be obtained thereof. Therefore, a aerosol generator can function as a device characterized with the alternative distributions of a narrowly size-distributed aerosol with high concentration in mass, and the liquid or solid aerosol can be generated thereof. The Geometric Standard Deviation (GSD) of the droplet size distribution can be kept under 1.