SYSTEM AND METHOD FOR DESULFURIZING COAL AND RECOVERING ELEMENTAL SULFUR

• Main Authors: LIU, Jianmin, GUO, Yangyang, XUE, Jianming, ZHU, Tingyu, DONG, Yuehong
• Format: Patent
• Language: Chinese; English; French
• Published: 13.12.2018
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; NON-METALLIC ELEMENTS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

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 qua