Flue gas desulfurization apparatus and method

Patent · Tue Jun 16 04:00:00 EDT 1981

OSTI ID:5751916

Flick, F S; Hollett, G T

A method of desulfurizing boiler flue gas by intimate contact thereof with dry particles of a reactant or absorbent, such as hydrated lime, preferably with recirculation of the flue gas and entrained reactant or absorbent particles. An apparatus suitable for carrying out the method comprises an upstanding conduit defining a vertical gas flow path in communication with a source of SO2-and particulate-laden flue gas, a conveyor for introducing a dry reactant or absorbent into the gas flow path, and a rotatable slinger mounted within the gas flow path for uniformly distributing the reactant or absorbent thereacross. In its preferred form, the apparatus includes recirculation means, preferably an eductor, mounted above the slinger for recirculation of gas and entrained reactant or absorbent within the gas flow path to enhance gas-solid contact time, a tangential gas inlet for creating vortical gas flow within the conduit, a gas expansion section at the conduit's discharge end and means for reversing the gas flow direction to enhance separation of particulates.

• Assignee: Energy And Pollution Controls Inc
• Patent Number(s): US 4273750
• OSTI ID: 5751916
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
02 PETROLEUM
020800 -- Petroleum-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DRY SCRUBBERS
EQUIPMENT
FLUE GAS
FLUID FLOW
FOSSIL-FUEL POWER PLANTS
GAS FLOW
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SCRUBBERS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES