Demonstration of Wellman-Lord/allied chemical FGD technology: demonstration test second year results. Final report February 73-October 79
The report gives results of an evaluation of the performance (over a 2-year period) of a full-scale flue gas desulfurization (FGD) unit to demonstrate the Wellman-Lord/Allied Chemical process. The process is regenerable, employing sodium sulfite wet scrubbing, thermal regeneration of the spent scrubber solution, and reduction to elemental sulfur of the recovered SO/sub 2/. Tests indicate that 89-90% of the SO/sub 2/ can be removed readily from the flue gas in a long-term dependable manner. However, best performance of the regeneration system for 1 year was limited to only 61% of the time called upon to operate. Major operating limitations were reduction unit problems, but unscheduled evaporator and booster blower outages, as well as start-ups and shutdowns, also contributed to downtime. As expected, process energy requirements, primarily for thermal regeneration of the scrubber solution and subsequent recovery of SO2, were quite large, amounting to 12% of the boiler heat input derived from fuel. Actual annualized operating cost was 14.9 mills/kWh, at 1978 prices for raw materials and utilities. Credits for the sale of byproduct sulfur were only 0.2 mills/kWh. The reported operation and performance occurred after some modification to the boiler to increase inlet flue gas temperature and after implementing FGD plant improvements identified during initial operation.
- Research Organization:
- TRW, Inc., Research Triangle Park, NC (USA)
- OSTI ID:
- 5783844
- Report Number(s):
- PB-81-246316
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
FLUE GAS
DESULFURIZATION
SCRUBBERS
PERFORMANCE
W-L SULFUR DIOXIDE RECOVERY PROCESS
EVALUATION
AIR POLLUTION CONTROL
BOILERS
COMBUSTION PRODUCTS
ECONOMIC ANALYSIS
INDUSTRIAL WASTES
OPERATING COST
SULFUR
SULFUR DIOXIDE
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
COST
ECONOMICS
ELEMENTS
EQUIPMENT
GASEOUS WASTES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)