Continuous process for scrubbing SO/sub 2/ from a gas stream with CO regeneration and CO/sub 2/ stripping

Patent · Tue Apr 30 04:00:00 EDT 1974

OSTI ID:7280089

Urban, P

A continuous scrubbing process for the removal of sulfur dioxide from flue gas and which controls sulfate by-product formation common in other processes is described. A conventional alkaline procedure is coupled with a regeneration procedure using thiosulfate as an intermediate in a multistep operation designed to convert the sulfite compound contained in the rich absorbent stream to hydrogen sulfide, rather than an attempt to directly reduce the sulfite compound to sulfide in a single step operation. This sulfite-to-thiosulfate-to-sulfide route provides a regeneration procedure which facilitates careful control of by-product formation during the regeneration operation and enables the production of a regenerated absorbent stream which can be directly recycled to the scrubbing step. This allows the system to be operated in a closed-loop fashion with respect to absorbent stream.

• Assignee: Universal Oil Products Co.
• Patent Number(s): US 3808325
• OSTI ID: 7280089
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
BY-PRODUCTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DESIGN
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SCRUBBING
SULFATES
SULFIDES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THIOSULFATES
WASTES