Method and apparatus for making sulphuric acid

Details Method and apparatus for making sulphuric acid Method and apparatus for making sulphuric acid

C - Chemistry, Metallurgy

01

B

23/111, 23/387

C01B 17/765 (2006.01) C01B 17/80 (2006.01)

Patent

CA 1181568

ABSTRACT OF THE DISCLOSURE In a system using the double absorption process for sulphuric acid manufacture, a single acid circulation system and a single cooler are employed. Acid from the exit of the air drying tower is circulated to and flows through the final absorber where it absorbs the inlet SO3 gas before joining with the acid from the intermediate absorber. The mixed stream is then cooled and split between the drying tower and the intermediate absorber. The circulation arrangement reduces the cooling to one relatively high tem- perature location, eliminates the transfer of SO2 to the effluent gas from acid in the normal single system, and simplifies acid strength and level control.

394588

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