Innovative Clean Coal Technology (ICCT): Demonstration of innovative applications of technology for cost reductions to the CT-121 FGD process. Quarterly report No. 6, July--September 1991
The project`s objective is to demonstrate innovative applications of technology for cost reduction for the Chiyoda Thoroughbred-121 (CT-121) process. The CT-121 process is a wet FGD process that removes SO{sub 2}, can achieve simultaneous particulate control, and can produce a salable by-product gypsum thereby reducing or even eliminating solid waste disposal problems. Figure 1 shows a flow schematic of the process. CT-121 removes SO{sub 2} and particulate matter in a unique limestone-based scrubber called the Jet Bubbling Reactor (JBR). IN the JBR, flue gas bubbles beneath the slurry, SO{sub 2} is absorbed, and particulate matter is removed from the gas. The agitator circulates limestone slurry to ensure that fresh reactant is always available in the bubbling or froth zone sot that SO{sub 2} removal can proceed at a rapid rate. Air is introduced into the bottom of the JBR to oxidize the absorbed SO{sub 2} to sulfate, and limestone is added continuously to neutralize the acid slurry and form gypsum. The JBR is designed to allow ample time for complete oxidation of the SO{sub 2}, for complete reaction of the limestone, and for growth of large gypsum crystals. The gypsum slurry is continuously withdrawn from the JBR and is to be dewatered in a gypsum stack. The stacking technique involves filing a diked area with gypsum slurry, allowing the gypsum solids to settle, and removing clear liquid from the top of the stack for recycle back to the process.
- Research Organization:
- Southern Co. Services, Inc., Birmingham, AL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC22-90PC89650
- OSTI ID:
- 10134181
- Report Number(s):
- DOE/PC/89650--T2; ON: DE92010963; CNN: Contract C-90-000284
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800
20 FOSSIL-FUELED POWER PLANTS
200202
54 ENVIRONMENTAL SCIENCES
540120
AIR POLLUTION CONTROL
CHEMICALS MONITORING AND TRANSPORT
CHIYODA THOROUGHBRED PROCESS
DEMONSTRATION PROGRAMS
DESULFURIZATION
FLUE GAS
GYPSUM
LIMESTONE
MATERIALS RECOVERY
NITROGEN OXIDES
NOXIOUS GAS AND PARTICULATE EMISSIONS
PARTICULATES
PROGRESS REPORT
RETROFITTING
SCRUBBERS
SORBENT INJECTION PROCESSES
SULFUR DIOXIDE
WASTE MANAGEMENT