Acid deposition on ductwork. Final report

Technical Report · Tue Nov 01 04:00:00 EST 1983

OSTI ID:5368550

Martin, W C; Froelich, D A; Weilert, C V; Dyer, P N

Corrosion of ductwork construction materials is a major cause of poor reliability in flue gas desulfurization systems. Operating temperatures in these systems are below the acid dewpoint. Consequently, acid deposition accurs, creating a corrosive environment on the duct surface. Two methods for characterization of this corrosive environment were evaluated. A predictive technique based on empirical vapor-liquid equilibrium data for acid-water systems was used to estimate acid condensate concentrations as a function of flue gas moisture content and temperature. An extractive test method, utilizing a controlled-temperature condenser to collect simulated duct surface deposits, was used in tests at an operating wet limestone FGD system. The testing was performed over a range of operating conditions from full bypass to 100% scrubbing at condenser temperatures from 100 to 300/sup 0/ F. Primary constituents of the samples were sulfate, chloride, fluoride, aluminum, iron and silicon. Chemical analysis of the samples confirmed predicted trands in the condensation of H/sub 2/SO/sub 4/ and HCl as a function of temperature. The predictive technique and the test method are recommended for general use in the selection process for new and/or replacement construction materials for FGD system applications. 12 references, 16 figures, 13 tables.

• Research Organization: Burns and McDonnell Engineering Co., Kansas City, MO (USA)
• OSTI ID: 5368550
• Report Number(s): EPRI-CS-3240; ON: DE84920140
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
ACID SULFATES
ALUMINIUM
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
CORROSION
CORROSIVE EFFECTS
DATA
DEPOSITS
DESULFURIZATION
DEW POINT
DUCTS
ELEMENTS
EMISSION SPECTROSCOPY
EQUIPMENT
EROSION
EXPERIMENTAL DATA
FLUE GAS
FLUORIDES
FLUORINE COMPOUNDS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON
LIME-LIMESTONE WET SCRUBBING PROCESSES
MATERIALS TESTING
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
POTENTIOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLING
SCALING
SCRUBBERS
SCRUBBING
SEMIMETALS
SEPARATION PROCESSES
SILICON
SIMULATION
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
SULFURIC ACID
TEMPERATURE DEPENDENCE
TESTING
TITRATION
TRANSITION ELEMENTS
WASTES