Method of and apparatus for processing sulfur-containing exhaust gas

Patent · Tue Mar 25 04:00:00 EST 1980

OSTI ID:5551171

Wanner, D

The sulfur-containing roasting gases of an ore-roasting plant are cooled in a waste-heat boiler, which produces steam, and then are subjected to particle removal in an electrostatic precipitator or cyclone. The gases are then scrubbed with recirculated aqueous sulfur acid and the gas is then passed through an electrostatic precipitator before being supplied to a plant for the contact process production of sulfur acid. According to the invention, the process is improved by condensing water from the gas in an indirect cooler between the scrubber and the final electrostatic precipitator while water or aqueous sulfur acid is sprayed into the gas upstream of the indirect gas cooler to augment the heat transfer from the gas to the cooled wall thereof.

• Assignee: Metallgesellschaft Ag (Germany, Federal Republic Of)
• Patent Number(s): US 4194889
• OSTI ID: 5551171
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AIR POLLUTION CONTROL
BOILERS
CHEMICAL REACTIONS
CONDENSERS
CONTROL
COOLING
DESULFURIZATION
ELECTROSTATIC PRECIPITATORS
ENERGY TRANSFER
EQUIPMENT
FLUE GAS
GASEOUS WASTES
HEAT TRANSFER
HYDROGEN COMPOUNDS
INORGANIC ACIDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
STEAM
SULFURIC ACID
VAPOR CONDENSERS
WASTE HEAT BOILERS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES
WATER