Process for reduction of sulfur dioxide emission from combustion gases combined with production of potassium sulfate

摘要

A wet flue gas desulfurization process and system are provided for removing sulfur dioxide from flue gases produced by processing operations of the type carried out in utility and industrial plants. In particular, the desulfurization process utilizes an ammonia-based solution having a free ammonia constituent that reacts with sulfur dioxide to generate an ammonium sulfate solution that can be further reacted to produce potassium sulfate, a valuable fertilizer. A second byproduct of this process is then reacted to regenerate free gaseous ammonia, which can then be recovered for subsequent use in the desulfurization of flue gases.