IMPROVED CLEANING FROM SULFUR DIOXIDE Russian patent published in 2018 - IPC B01D53/14 B01D53/50 C01B17/04 

FIELD: chemistry.

SUBSTANCE: method includes providing the off-gas of the melting furnace, separating sulfur dioxide from the exhaust gas to produce concentrated sulfur dioxide and exhaust gas for venting, mixing the concentrated sulfur dioxide with the fuel gas, heating the resulting mixture of fuel gas and sulfur dioxide by burning the fuel gas, contained in a mixture of fuel gas and sulfur dioxide, with oxygen so that the concentrated sulfur dioxide and fuel gas are reacted to form a mixture of gaseous products containing sulfur and hydrogen sulphide and removing most thereof, preferably substantially all of sulfur and substantially all of hydrogen sulfide from the gaseous product mixture, with the remaining mixture of gaseous products being post-burned prior to release into the atmosphere.

EFFECT: invention provides a high efficiency of the sulfur extraction, the ability to use the remaining mixture of gaseous products, to reduce the fuel consumption and the absence of losses.

26 cl, 2 dwg, 1 tbl