Enhanced utilization of furnace injected calcium-based sorbents

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5914099

Weber, G F; Collings, M E; Bobman, M H

Simultaneous control of SO/sub x//NO/sub x/ emissions is under investigation at the University of North Dakota Energy Research Center (UNDERC). Furnace injection tests have focused on the direct injection of pressure-hydrated lime followed by particulate collection in a baghouse operated at temperatures of 63/sup 0/ to 149/sup 0/C (145/sup 0/ to 300/sup 0/F). Sulfur dioxide reduction as high as 80% has been observed for high-calcium pressure-hydrated lime (PHL) injected at a Ca/SO/sub 2/ mole ratio of 2.0 with all of the SO/sub 2/ capture occurring in the flue gas at temperatures exceeding 760/sup 0/C (1400/sup 0/F). Pilot-scale tests have shown that furnace injection of high-calcium PHL at a Ca/SO/sub 2/ ratio of 1.0 can result in 65% to 70% SO/sub 2/ capture if the baghouse is operated at 71/sup 0/C (160/sup 0/F), approximately 11/sup 0/C (20/sup 0/F) above the dew point. Improved sorbent utilization has been observed both for high-calcium PHL and for additive enhanced high-calcium PHL at baghouse temperatures of 63/sup 0/ to 104/sup 0/C (145/sup 0/ to 220/sup 0/F). Of the 65% to 70% overall utilization, 45% to 50% of the sorbent was utilized in the upstream flue gas and an additional 15% to 25% in the baghouse. 12 refs., 7 figs., 4 tabs.

• Research Organization: North Dakota Univ., Grand Forks (USA). Energy Research Center
• DOE Contract Number: FC21-83FE60181
• OSTI ID: 5914099
• Report Number(s): DOE/FE/60181-178; CONF-860634-1; ON: DE86010901
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ADDITIVES
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
ASHES
BAGHOUSES
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL
COMBUSTION
DATA
DESULFURIZATION
DEW POINT
ENERGY SOURCES
EQUIPMENT
EXPERIMENTAL DATA
FLUE GAS
FOSSIL FUELS
FUELS
GASEOUS WASTES
HYDRATION
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
RESIDUES
SOLVATION
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS