Pilot-scale studies of in-furnace hydrated lime injection for flue gas SO/sub 2/ emission control

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6438006

Weber, G F; Bobman, M H; Schelkoph, G L

Simultaneous control of SO/sub x/NO/sub x/ emissions, derived from the combustion of low-rank coal, is under investigation at the University of North Dakota Energy Research Center (UNDERC). Process development work has been performed on both bench-scale and pilot-scale systems. Direct furnace injection of calcium-based SO/sub 2/ sorbent materials is the SO/sub 2/ control technique under evaluation. Furnace injection tests have focused on the direct injection of pressure-hydrated lime at flue gas temperatures ranging from 1500/sup 0/ to 3000/sup 0/F (815/sup 0/ to 1650/sup 0/C) followed by collection in a baghouse operated at temperatures up to 1000/sup 0/F (540/sup 0/C). Sorbent utilization values up to 55% at a Ca/S mole ratio of 1.0 have been observed. Eighty percent SO/sub 2/ reduction has been observed at Ca/S mole ratios of less than or equal to 2.0. Sorbent utilization in the baghouse has never exceeded 10% for baghouse temperatures ranging from 800/sup 0/ to 1000/sup 0/F (425/sup 0/ to 540/sup 0/C). Residence time and the temperature regime of the sorbent injection location appear to be the critical parameters controlling SO/sub 2/ reduction and sorbent utilization. 10 references, 16 figures, 2 tables.

• Research Organization: North Dakota Univ., Grand Forks (USA). Energy Research Center
• DOE Contract Number: FC21-83FE60181
• OSTI ID: 6438006
• Report Number(s): DOE/FE/60181-84; CONF-841155-2; ON: DE85002495
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
BAGHOUSES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
CONTROL
DATA
DENITRIFICATION
DESULFURIZATION
ENERGY SOURCES
EQUIPMENT
EXPERIMENTAL DATA
FLUE GAS
FOSSIL FUELS
FUELS
FURNACES
GASEOUS WASTES
HIGH TEMPERATURE
INFORMATION
MATERIALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SORPTION
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
VERY HIGH TEMPERATURE
WASTES