Abstract
A 1-MW horizontal scrubber was evaluated by the Tennessee Valley Authority (TVA) to determine the performance of this scrubbing system for desulfurizing flue gas obtained from burning high-sulfur eastern coal. Attention was directed toward determination of SO/sub 2/ removal as a function of various scrubber operating parameters. Absorbents tested were sodium carbonate, lime, and limestone. The horizontal scrubber used at Colbert was designed by Pullman Kellogg and fabricated by TVA. The design operating conditions were 19 ft/sec flue gas velocity and a liquid rate of 40 gpm/stage (30 psi nozzle pressure and six spray stages). At these design conditions Pullman Kellogg predicted 90+% SO/sub 2/ removal efficiencies for lime or limestone slurries. The horizontal scrubber was tested in the crossflow and counterflow configurations (liquid flow relative to gas flow). The SO/sub 2/ removals were lower than expected, possibly due to low slurry retention time in the small scrubber.
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