Desulfurization of flue gas

Patent · Tue Feb 19 04:00:00 EST 1980

OSTI ID:5586872

Hoekstra, I A

A method of desulfurization of flue gas involves the use of two recirculating water systems separated by a secondary cooling stage. In the first system, partial cooling and removal of some particulates and SO/sub 3/ is effected by direct contact of the gas and water, followed by the secondary cooling which further removes particulates and SO/sub 3/ in the condensate. In the second recirculating water system, SO/sub 2/ is first absorbed under atmospheric conditions and is then desorbed under vacuum conditions to effect refrigeration of the recirculating water. The refrigerating effect is balanced against the contact and secondary cooling of the gas to stabilize the temperature at which absorption takes place such that a selected percentage of SO/sub 2/ is removed from the gas.

• Assignee: IFI; EDB-82-058624
• Patent Number(s): US 4189309
• OSTI ID: 5586872
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
CIRCULATING SYSTEMS
CONTROL
COOLING
DESORPTION
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
HYDROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION CONTROL
REFRIGERATION
STABILIZATION
SULFUR COMPOUNDS
SULFUR OXIDES
TEMPERATURE EFFECTS
VACUUM SYSTEMS
WASTES
WATER