Process for pressure stripping of sulfur dioxide from buffered s

Details Process for pressure stripping of sulfur dioxide from buffered s Process for pressure stripping of sulfur dioxide from buffered s

1977-03-04

1979-02-20

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423539, 423242, C01B 1700, C01B 1748

Patent

active

041407512

ABSTRACT:
A process for steam stripping sulfur dioxide from a buffered aqueous solution in which it is absorbed in a flue gas desulfurization process is carried out at pressure greater than atmospheric. The process of pressure stripping of sulfur dioxide surprisingly results in increased steam economy as compared to stripping at atmospheric pressure and yields sulfur dioxide vapor which can be directly condensed to a liquid product with ordinary cooling water, eliminating the need for drying, refrigeration or compression operations. The high temperatures corresponding to high steam pressures enable economical use of stripping vessel overheads for preheating operations also. Stripping at pressures of 50 to 65 psig results in steam requirements which are only one-third to one-half of that at atmospheric pressure stripping. At the high pressures lower gas flow rates permit the use of more compact stripping equipment.

REFERENCES:
patent: 1589133 (1926-06-01), Eustis
patent: 3687623 (1972-08-01), Terrana et al.
patent: 3767777 (1973-10-01), Frye et al.
The CITREX Process for SOx Removal, S. Vasan, Chemical Engineering Progress, (vol. 71, No. 5), May 1975, pp. 61-65.

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