Alleviation of a superheater fouling problem in a cyclone-fired boiler unit

Conference · Tue Nov 01 04:00:00 EST 1983 · Coal Technol. (Houston); (United States)

OSTI ID:6505856

Keyes, H E; Bain, D I; Hornback, S A

The problem of superheater fouling and corrosion in coal-fired steam generating units originates from selective enrichment of inorganic constituents in the coal ash. This enrichment process is affected by fuel quality, method of firing, particle size of fuel, temperature and residence time in the high temperature zone of the unit. This paper describes results and conclusions of testing done to study the mechanisms of deposit formation and subsequent corrosion. The results confirmed that the chemical additive DUSCO 8207 was very successful in alleviating the fouling of the pendant secondary reheat superheater under all operating conditions experienced so far. Boiler inspections have revealed that little or no fouling occurred since the product was applied. Overfiring the unit with the associated increase in flue gas temperatures did not cause fouling with additive application. Routine periodic soot blowing has been adequate to remove ash buildup and deposits with additive application. It was found that application of the additive has completely eliminated derations as well as forced outages due to fouling and associated pluggage in the secondary reheater area.

• Research Organization: Public Service Company of New Hampshire
• OSTI ID: 6505856
• Report Number(s): CONF-831112-
• Conference Information: Journal Name: Coal Technol. (Houston); (United States) Journal Volume: 3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
ADDITIVES
ANTIFOULANTS
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
CORROSION
CYCLONE COMBUSTORS
DEPOSITS
ELECTRIC UTILITIES
ENERGY SOURCES
FOSSIL FUELS
FOULING
FUELS
HEATING
INSPECTION
MATERIALS
OXIDATION
PUBLIC UTILITIES
STEAM GENERATORS
SUPERHEATERS
SUPERHEATING
THERMOCHEMICAL PROCESSES
VAPOR GENERATORS