Eastern coal spray dryer evaluation. Final report

Technical Report · Thu Nov 01 04:00:00 EST 1984

OSTI ID:6126078

Sawyers, L E; Smith, P V; Caravano, C; Jankura, B J

Development efforts for dry scrubbing technology for flue gas desulfurization (FGD) have been geared toward utility boilers burning low-sulfur western coals rather than eastern high-sulfur coals. This has been due to the low quantity of reagent and lower SO/sub 2/ removal required with the use of western coals and has contributed to the economic attractiveness of the dry scrubber system. To evaluate the use of the dry scrubber for flue gas desulfurization of eastern high-sulfur coals, the US Department of Energy contracted with the Babcock and Wilcox Company to perform a study to determine the technical and economical feasibility of such systems. The program was organized into the following tasks: (1) configuration specification and system preparation; (2) performance evaluation; (3) load-following and reliability evaluation; (4) commercial unit economic evaluation; and (5) report. The general conclusions of the program are: Effective dry scrubber operation for an eastern high-sulfur coal would include a higher stoichiometric ratio, low spray dryer approach temperature, and the optimized use of recycle material. A dry scrubber system designed for an eastern high-sulfur coal using a high-calcium lime reagent would not be economically competitive with a limestone wet scrubber system due to reagent costs. Use of an optimized furnace limestone injection system and recycle material would substantially reduce reagent costs and increase economic attractiveness of dry scrubber systems for eastern high-sulfur coals. This is in comparison to dry scrubber systems with nonlimestone injection. 10 references, 87 figures, 26 tables.

• Research Organization: Babcock and Wilcox Co., Alliance, OH (USA). Research and Development Div.
• DOE Contract Number: AC22-81FE17056
• OSTI ID: 6126078
• Report Number(s): DOE/FE/17056-T1; ON: DE85008303
• 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)
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
DATA
DESULFURIZATION
DIAGRAMS
DRY SCRUBBERS
ECONOMICS
EQUIPMENT
EXPERIMENTAL DATA
FLOWSHEETS
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
INFORMATION
LIMESTONE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
REMOVAL
ROCKS
SCRUBBERS
SEDIMENTARY ROCKS
SPRAYS
STOICHIOMETRY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TESTING
THERMAL POWER PLANTS
WASTES