SYSTEM AND METHOD FOR DESULFURIZING COAL AND RECOVERING ELEMENTAL SULFUR

摘要

A system and a method for desulfurizing coal and recovering elemental sulfur. The system comprises a microwave desulfurization unit, and further comprises a raw coal drying unit, an exhaust gas collecting unit, and an elemental sulfur reaction unit, a discharge port of the raw coal drying unit being connected to a feed port of the microwave desulfurization unit, the exhaust gas collecting unit being disposed at an air outlet of the microwave desulfurization unit, and an air inlet of the elemental sulfur reaction unit being respectively connected to an air outlet of the raw coal drying unit and an air outlet of the exhaust gas collecting unit. The system and method can simultaneously remove and recover sulfur from coal, producing treated coal with a total sulfur content of less than 2.0%, and a total recovery rate of elemental sulfur of not less than 40%. The system and the method are safe and energy-saving and are suitable for desulfurization and sulfur recovery of medium- and high-sulfur coals of varying quality.