Operating experience with the Wellman-Lord/Allied Chemical flue gas desulfurization plant at northern Indiana Public Service Company's Dean H. Mitchell Station

Conference · Mon Jan 01 00:00:00 EST 1979 · Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States)

OSTI ID:6771892

Link, F W; Mann, E L

During the 9/16/77-12/31/78 demonstration test period, FGD outages occurred on 315 out of 472 days because of corrosion of the booster fan's air foil blades resulting from accumulated fly ash, water, and ice in the fan housing and on the blades; high silica levels in the boiler; corrosion of the guillotine isolation damper resulting from fly ash buildup; and fluctuating steam pressure and flow to the FGD plant due to wet, poor-quality coal. Other problems included leaks in the absorber tray; plugging of the evaporator circulating pump driver during interruptions in the main steam supply; and a lower than expected purge dryer operating capacity. The booster fan problems have been resolved by revisions and additions to the fan design. The installation of a continuous silica analyzer and other modifications have effectively controlled the boiler silica problems. The damper was modified and the seals replaced with ones made of a more corrosion-resistant alloy, but the fly ash buildup problem persists. Higher-quality coal is now used so that boiler operation is no longer erratic.

• Research Organization: North. Indiana Public Serv. Co.
• OSTI ID: 6771892
• Report Number(s): CONF-790634-
• Journal Information: Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States), Vol. 79-31.7; Conference: 72. annual Air Pollution Control Association meeting, Cincinnati, OH, USA, 24 Jun 1979
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
POLLUTION CONTROL EQUIPMENT
DESIGN
SILICA
MONITORING
WASTE PROCESSING PLANTS
OPERATION
CORROSION
FLY ASH
LEAKS
POWER PLANTS
W-L SULFUR DIOXIDE RECOVERY PROCESS
AEROSOL WASTES
ASHES
CHALCOGENIDES
CHEMICAL REACTIONS
EQUIPMENT
INDUSTRIAL PLANTS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RESIDUES
SILICON COMPOUNDS
SILICON OXIDES
WASTES
010800* - Coal
Lignite
& Peat- Waste Management