Demonstration of Wellman-Lord/allied chemical FGD technology: demonstration test second year results. Final report February 73-October 79

Technical Report · Sat Aug 01 04:00:00 EDT 1981

OSTI ID:5783844

Adams, R C; Mulligan, S W; Swanson, R R

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

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
CONTROL
COST
DESULFURIZATION
ECONOMIC ANALYSIS
ECONOMICS
ELEMENTS
EQUIPMENT
EVALUATION
FLUE GAS
GASEOUS WASTES
INDUSTRIAL WASTES
NONMETALS
OPERATING COST
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
W-L SULFUR DIOXIDE RECOVERY PROCESS
WASTES