Cyclic reheat for FGD: status report. Final report

Technical Report · Fri May 01 04:00:00 EDT 1981

OSTI ID:6339506

Lee, G C.Y.

In this study cyclic reheat refers to the extraction of heat from the flue gas entering a scrubber of a wet FGD system and using that heat to elevate the temperature of the flue gas leaving the scrubber. Heat recovery by this means eliminates the fuel or steam consumption normally employed for FGD reheat. The objectives of this study are to publicize the status of cyclic reheat research activities, to characterize Southwestern Public Service's Harrington Station cyclic reheat installation, and to evaluate the economics of cyclic reheat by comparison with conventional reheat systems. Three conventional-type reheat systems - in-line steam, hot-air injection, and oil-fired reheat - were evaluated and compared with the Harrington-type cyclic reheat system for both low-sulfur and high-sulfur coal cases. Study conclusions include the following: considerable research activities on cyclic reheat are being conducted in the United States and Japan with promising results. Cyclic reheat operating experience at Harrington Station has been superior, and system performance is reasonably close to design. The major advantage of cyclic reheat is energy savings which is realized at the expense of higher capital cost. For high-sulfur coal application with flue gas entering the heat extractor at 300/sup 0/F, a cyclic reheat system has been estimated to have a 30-year levelized cost advantage over a conventional in-line steam reheat system when the cost of medium pressure steam is valued at more than $2.30 per thousand pounds.

• Research Organization: Bechtel National, Inc., San Francisco, CA (USA)
• OSTI ID: 6339506
• Report Number(s): EPRI-CS-1843
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
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CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CORROSION
COST
DATA
DESULFURIZATION
ECONOMICS
ENERGY CONSERVATION
ENERGY RECOVERY
EQUIPMENT
EXPERIMENTAL DATA
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
HEAT EXCHANGERS
HEAT RECOVERY
HEATING
INFORMATION
NUMERICAL DATA
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
RECOVERY
RESEARCH PROGRAMS
SCRUBBERS
THERMAL POWER PLANTS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES