Evaluation of Ultralow Emission Performance of Magnesium Oxide (MgO) Wet Flue Gas Desulfurization Unit for Coal-fired Units

Abstract Performance tests and evaluations were carried out on the magnesium oxide (MgO) wet flue gas desulfurization unit being used in the ultra-low emission reformation of coal-fired units. It is of reference for units that have not yet carried out ultra-low emission transformation. Taking a magnesium oxide (MgO) wet flue gas desulfurization device of a 350MW coal-fired unit that has completed ultra-low emission modification as the research object, The main performance indexes such as desulfurization efficiency, GGH air leakage rate and reducing agent consumption of the device were tested, and the system operation status were mastered. The test proves that when the magnesium oxide (MgO) wet flue gas desulfurization device used in the desulfurization ultra-low emission reform of the unit is operated under design conditions, It can maintain high desulfurization efficiency and low SO2 emission concentration for a long time, and the main design indicators can meet the design value requirements. The effect of GGH leakage rate on SO2 emission concentration is obvious, resulting in system desulfurization efficiency slightly lower than that of absorption tower desulfurization efficiency.