Performance of a spray dryer/ESP flue gas cleanup system during testing at the Pittsburgh Energy Technology Center

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5579034

Yeh, J T; Drummond, C J; Joubert, J I; Tulenko, D; Crynack, R R; Hochhauser, M

Wheelabrator Air Pollution Control and the United States Department of Energy jointly sponsored a project to evaluate the potential for the application of spray dryer flue gas desulfurization (FGD) systems to existing coal-fired boilers equipped with electrostatic precipitators for particulate emissions control. The objectives of this project were to characterize the performance of a spray dryer FGD system using flue gas from the combustion of different types of coal, and to study the effectiveness of an electrostatic precipitator (ESP) in controlling particulate emissions from this system. Three different coals (low-, medium-, and high-sulfur coal) were burned in a 500 lb/h pulverized-coal combustion test facility at the Pittsburg Energy Technology Center. Sulfur dioxide was removed from the flue gas by injection of a lime slurry in a spray dryer. Particulate emissions were controlled using a mobile electrostatic precipitator. For each fuel, a three-part test program was conducted. This test program consisted of: (1) base-line ESP performance tests without spray dryer operation to determine requirements for fly ash collection; (2) parametric tests defining sulfur dioxide removal efficiency and ESP collection efficiency at various spray dryer operating conditions; and (3) sorbent recycle tests in which the particulate collected by the ESP was recycled by injection into the spray dryer with the fresh sorbent to improve reagent utilization. Test results show that sulfur dioxide removal efficiencies of 90% can be achieved for each of the three coals tested using the combined spray dryer and electrostatic precipitator system for emissions control. Performance criteria for the electrostatic precipitator were met during all phases of testing. 21 refs., 4 figs., 3 tabs.

• Research Organization: USDOE Pittsburgh Energy Technology Center, PA; Wheelabrator-Frye, Inc., Pittsburgh, PA (USA). Air Pollution Control Div.
• OSTI ID: 5579034
• Report Number(s): CONF-850630-1; ON: DE85013474
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
ASHES
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
DRYING
ELECTROSTATIC PRECIPITATORS
EQUIPMENT
FLUE GAS
FLY ASH
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION CONTROL EQUIPMENT
PURIFICATION
REMOVAL
RESIDUES
SPRAY DRYING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TESTING
WASTES