Combined NO sub x /SO sub 2 removal in spray-dryer FGD systems
Increased control of sulfur dioxide (SO{sub 2}) has been the focus of air pollution and acid deposition debates for many years, and the new Clean Air Act Amendments will require controls for this pollutant at many more installations. Calls for greater control of nitrogen oxides (NO{sub x}) have also been heard in response to their implication in environmental damage and possible links to global climate effects. This has already led to more stringent NO{sub x} emission regulations in several countries and some parts of the United States. While a number of options are available to remove either NO{sub x} or SO{sub 2} from flue gas, integrated technologies that can simultaneously remove both species (and perhaps particulate matter (PM) as well) in a single system can offer significant advantages. The benefits of such integration generally include better system operability, higher reliability, and lower capital and operating costs. In addition, there may be advantages due to lower consumption of resources, reduced waste volumes, and beneficial synergisms between the pollutants. The construction of complete, integrated systems will be of interest for new utility plants and industrial installations, as well as existing sites that currently have minimal pollution control. However, opportunities to incorporate integrated pollution control into existing flue gas cleanup (FGC) systems will be particularly important for operators with existing SO{sub 2} scrubbing systems who are faced with the need to add additional control of NO{sub x}. This paper describes research that could lead to relatively low-cost NO{sub x} control retrofits of flue gas desulfurization (FGD) systems based on spray drying. 10 refs., 10 figs., 3 tabs.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5824770
- Report Number(s):
- ANL/CP-72118; CONF-910198-1; ON: DE91011177
- Resource Relation:
- Conference: Acid rain retrofit seminar: the effective use of lime, Philadelphia, PA (USA), 9-10 Jan 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
FLUE GAS
DESULFURIZATION
NITROGEN OXIDES
AIR POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RESEARCH PROGRAMS
SULFUR DIOXIDE
RETROFITTING
SPRAY DRYING
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DRYING
EQUIPMENT
GASEOUS WASTES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects