Multi-stage process for reducing the concentration of pollutants in an effluent using an ammonium salt
This patent describes a process for reducing the concentration of nitrogen oxides in the effluent from the combustion of a carbonaceous fuel. The process comprising: injecting a first treatment agent comprising urea or ammonia into the effluent at a first temperature zone where the effluent is at a temperature of about 1700{sup 0}F. to about 2000{sup 0}F., and injecting a second treatment agent comprising an ammonium of salt of an organic acid having a carbon to nitrogen ratio of greater than 1:1 into the effluent at a second temperature zone where the effluent temperature is about 1300{sup 0}F. to about 1750{sup 0}F., wherein the treatment agents are injected under conditions effective to reduce the effluent pollution index.
- Assignee:
- Fuel Tech Inc., Stamford, CT
- Patent Number(s):
- US 4863704
- Application Number:
- PPN: US 7207292A
- OSTI ID:
- 5070913
- Resource Relation:
- Patent File Date: 15 Jun 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
20 FOSSIL-FUELED POWER PLANTS
CARBONACEOUS MATERIALS
COMBUSTION PRODUCTS
NITROGEN OXIDES
AIR POLLUTION CONTROL
AIR POLLUTION ABATEMENT
AMMONIA
CHEMICAL EFFLUENTS
FUELS
POLLUTION CONTROL EQUIPMENT
REMEDIAL ACTION
CHALCOGENIDES
CONTROL
EQUIPMENT
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POLLUTION CONTROL
010900* - Coal
Lignite
& Peat- Environmental Aspects
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
014000 - Coal
Lignite
& Peat- Combustion
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions