Sulfur Burning Process


Ambient air is drawn through a high efficiency drying tower by the main compressor to remove moisture. A Brink® Mist Eliminator provides efficient acid mist removal, which is critical for protection of the main compressor. The compressed dry gas enters the sulfur burner where molten sulfur is burned in the presence of the dry air to produce high sulfur dioxide (SO2) gas strength. The hot SO2 combustion gas is then cooled in a steam boiler to the proper temperature for introduction to the converter system.


SO3 Absorption

After passing through the first three layers of MECS XLP and Cesium catalyst, SO3 rich gas is cooled and absorbed with 98% sulfuric acid (H2SO4) in the Interpass absorption tower. The lean SO2 gas flows through a Brink Mist Eliminator to remove fine mist particles, thereby protecting downstream equipment. The clean gas is then reheated and enters the converter to complete the conversion of SO2 to SO3. The SO3 formed is absorbed in 98% H2SO4 in the final absorbing tower. Brink Mist Eliminators are installed in the final tower to insure the stack gas will meet environmental regulations on acid mist.


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