Process for dry scrubbing of flue gas
Patent
·
OSTI ID:5052100
A flue gas dry scrubbing process and system achieves higher sulfur dioxide removal efficiency with a better utilization of alkali reagent chemicals as well as increased dry product recovery performance using a combination of spray drying with an alkali reagent slurry and with a recycled stream comprising a mixture of unreacted alkali, sulfite and sulfate reaction products and flyash which directly contacts the sulfur dioxide containing flue gas. Preferably the recycled mixture contacts the flue gas in the spray dryer. The invention utilizes a splitting method and a splitter apparatus wherein the particle product powder is separated into two fractions for recycling and for product disposal. The rate of splitting is fully adjustable over a wide range.
- Assignee:
- Peabody Process Systems Inc
- Patent Number(s):
- US 4324770
- OSTI ID:
- 5052100
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DRY SCRUBBERS
EQUIPMENT
FLUE GAS
FLY ASH
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RECYCLING
REMOVAL
RESIDUES
SCRUBBERS
SCRUBBING
SULFATES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
010800 -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DRY SCRUBBERS
EQUIPMENT
FLUE GAS
FLY ASH
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RECYCLING
REMOVAL
RESIDUES
SCRUBBERS
SCRUBBING
SULFATES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES