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US 3,950,493 AGranted
Process for absorbing SO.sub.3
AssigneeMetallgesellschaft Aktiengesellschaft
InventorsKarl-Heinz Dorr, Lothar Reh, Hugo Grimm, Karel Vydra
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Abstract
A process for removing sulfur trioxide from gases wherein the sulfur trioxide-containing gas is treated with sulfuric acid in a Venturi absorber, the sulfur-trioxide laden sulfuric acid is passed in indirect heat exchange with a cooling fluid within the widening outlet of the absorber and the sulfur trioxide-laden sulfuric acid is separated from the gas phase.
Claims2
A method of removing sulfur trioxide from a gas stream containing same, comprising the steps of:
- a. spraying sulfuric acid into the sulfur-trioxide gas stream;
- b. passing said sulfur-trioxide containing gas stream in admixture with the sprayed droplets of sulfuric acid as absorbent through a vertical, downwardly-discharging Venturi absorber with a downwardly widening discharge portion having an outlet end;
- c. abstracting heat from the mixture in step (b) by indirect heat exchange with a cooling fluid at a point adjacent the outlet end of the vertical Venturi absorber whereby said mixture is cooled after an initial absorption to a temperature of about 120.degree.C;
- d. collecting the liquid phase of the mixture in a first sump located directly below said discharge portion;
- e. deflecting the gas phase of the mixture through a horizontal Venturi absorber connected to the discharge portion of the vertical Venturi absorber to effect after absorption of sulfur-trioxide from the gas;
- f. passing the gas phase after traversal through the horizontal Venturi into an upwardly extending settling chamber to effect additional after absorption;
- g. collecting mist from the gas phase in the chamber and forming droplets therefrom;
- and
- h. collecting said droplets in a second sump at the base of said chamber.
6 more elements
Dependencies are inferred from the claim text.