LIN's flue gas desulfurization process according to reaction mechanism

Patent · Tue Dec 04 04:00:00 EST 1990

OSTI ID:6180914

Lin, P W

This patent describes the improved flue gas desulfurization process which is effective for removing sulfur dioxide in the flue gas with a lime-bearing material in a fluidized lime reactor. The effectiveness of the process is due primarily to the presence of sulfur trioxide in the gas, the sulfur trioxide being generated in a catalytic converter and a bypass circuit transmitting a portion of the flue gas past the catalytic converter. Sulfur trioxide may also be directly injected by duct injection in order to enhance the removal of sulfur dioxide from flue gas in the fluidized lime reactor. In the initial phase, the duct injected sulfur trioxide efficiently raises the temperature of the lime-bearing particles from the exothermic reaction with lime, resulting in the establishment of the steep temperature and sulfur oxides gradients which induce an autogeneous conversion of sulfur dioxide to sulfur trioxide.

• Assignee: NOV; EDB-92-009928; NOV-91-025015
• Patent Number(s): US 4975257; A
• Application Number: PPN: US 7-261376
• OSTI ID: 6180914
• Country of Publication: United States
• Language: English

Related Subjects

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54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CATALYTIC CONVERTERS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONTROL
DESIGN
DESULFURIZATION
EQUIPMENT
FLUE GAS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
REMOVAL
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFUR TRIOXIDE
WASTES