Material and cleaning options for cyclic reheat systems

Technical Report · Sat Feb 01 04:00:00 EST 1986

OSTI ID:5987749

Krause, H H; Ireland, P A; Charles, G A

A cyclic reheat system for a wet flue gas desulfurization system extracts heat from the inlet flue gas and transfers this heat to the outlet flue gas. One method of achieving this uses tube-type heat exchangers in the inlet and outlet gas streams with a fluid (e.g., water) circulated between them. For high sulfur coal, questions of material selection and cleaning methods of the inlet heat exchanger exist because of the potential for acid condensation. An inlet gas heat exchanger test apparatus was built and installed on a slipstream from a high sulfur coal fired power plant. Results obtained from the first 3061 hours of exposure indicated low corrosion rates for several stainless steels and that a water wash prevented tube solids buildup. The second exposure period of 3046 hours, during which the heat exchanger was not washed, resulted in severe pitting of many of the alloys beneath the deposits that accumulated. This report presents the results of the second exposure period. 5 refs., 55 figs., 6 tabs.

• Research Organization: Battelle Columbus Labs., OH (USA); Stearns Catalytic Corp., Denver, CO (USA)
• OSTI ID: 5987749
• Report Number(s): EPRI-CS-4400; ON: TI86920195
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200101* -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
AEROSOL WASTES
ALLOYS
ASHES
CARBIDES
CARBON COMPOUNDS
CARBON STEELS
CAST IRON
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CLEANING
COATINGS
CORROSION
CORROSION PROTECTION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
DATA
DEPOSITS
DESULFURIZATION
DEW POINT
ELEMENTS
ENERGY RECOVERY
EXPERIMENTAL DATA
FLUE GAS
FLY ASH
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
HEAT EXCHANGERS
HEAT RECOVERY
HEATING
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
MATERIALS
MATERIALS TESTING
METALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
OXYGEN COMPOUNDS
PITTING CORROSION
POWER PLANTS
PROTECTIVE COATINGS
RECOMMENDATIONS
RECOVERY
RESIDUES
SCRUBBING
STAINLESS STEELS
STEELS
SULFURIC ACID
TESTING
THERMAL POWER PLANTS
TITANIUM
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASHING
WASTES
WATER
ZIRCONIUM