Cooled sulphur furnace bypass system

Details Cooled sulphur furnace bypass system Cooled sulphur furnace bypass system

C - Chemistry, Metallurgy

01

B

C01B 17/76 (2006.01) C01B 17/54 (2006.01) C01B 17/80 (2006.01)

Patent

CA 2055848

Apparatus and process for the production of gaseous sulphur dioxide mixture for conversion to sulphur trioxide in a catalytic converter in the production of sulphuric acid by the contact process. Apparatus comprises the furnace to produce sulphur dioxide gas from elemental sulphur and a first dry air stream; means for feeding a first portion of the sulphur dioxide gas to a waste heat boiler to cool the gas; the improvement comprising combining a second portion of the sulphur dioxide gas exiting the furnace with a second dry air stream to provide a combined gaseous stream which bypasses the boiler and subsequently is combined with the cooled sulphur dioxide stream. The system provides use of a bypass valve which experiences only cooled sulphur dioxide containing gases, with its attendant reduced corrosion. Further, the system may operate at higher temperatures than is common to provide further advantages,

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