Method for purification of industrial flue gases

Patent · Tue Apr 27 04:00:00 EDT 1976

OSTI ID:7340429

Thirion, P

Improved methods and apparatus are presented for the purification of industrial flue gases, combustion products and gaseous effluents before their rejection to the atmosphere, said gases and effluents containing as impurities especially sulfur dioxide and also oxides of nitrogen, sulphuric fogs, dust and soot, said method comprising essentially the steps of extracting the dust from the gaseous fluid to be purified; proceeding to a chemical purification phase of the gaseous fluid by establishing intimate contact between said fluid and an aqueous solution of hydrogen peroxide at a temperature lower than 80/sup 0/C; and carrying out a concentration phase by effecting a direct contact between the gases and the liquid of the gaseous effluents in the hot state, and said liquid being constituted by sulphuric acid formed during said purification phase. The chemical purification phase is carried out on the gaseous effluents when these latter are saturated with water and is effected at a temperature between 55 and 65/sup 0/C. 13 Claims, 1 Drawing Figure.

• Assignee: Oxysynthese
• Patent Number(s): US 3953578
• OSTI ID: 7340429
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
560200* -- Thermal Effects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
AIR POLLUTION
BOILER FUEL
CHALCOGENIDES
COLLOIDS
COMBUSTION PRODUCTS
DISPERSIONS
DUSTS
FLUE GAS
FUELS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INORGANIC ACIDS
MANAGEMENT
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
POLLUTION
POWER PLANTS
PURIFICATION
REMOVAL
SEPARATION PROCESSES
SOLS
SOOT
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
SURFACE PROPERTIES
THERMAL POWER PLANTS
WASTE MANAGEMENT
WASTES