Phase II: The age of high velocity scrubbing
Conference
·
OSTI ID:458510
- Dravo Lime Co., Pittsburgh, PA (United States)
The Clean Air Act Amendments require substantial reduction of SO{sub 2} emissions from coal-fired generating facilities and offer incentives to exceed targets by accumulation of excess emission allowances. Although considered costly, wet scrubbing was the leading post-combustion technology to achieve these reductions in Phase 1. However, the emergence of other SO{sub 2} control methods including the broad acceptance of low sulfur coal has prompted investigations into reducing the capital and operating costs of scrubbing for those facilities evaluating this option for Phase 2 compliance. One method to reduce the costs associated with scrubbing is to increase the scrubber gas velocity as demonstrated at the Northern Indiana Public Service Company`s Bailly Station or at Ohio Edison Company`s Niles Generation Station. Scrubbers designed for higher velocities will have a smaller cross sectional area and may also permit a reduction in the number of required operating scrubbers. Dravo Lime Company in cooperation with the Ohio Coal Development Office and Cinergy Corporation has conducted evaluations of high gas velocity scrubbing in magnesium-enhanced lime FGD processes in a 4.5 MW pilot plant. These studies have shown a significant decrease in the quantity of liquor required to scrub the same volume of gas as the scrubber velocity increases. This paper will discuss operating conditions for 98% SO{sub 2} removal at gas velocities of 10 to 25 ft/sec in both vertical and horizontal scrubbers, potential cost impact, and comparisons between magnesium-enhanced lime and limestone FGD systems.
- OSTI ID:
- 458510
- Report Number(s):
- CONF-960322--; ISBN 0-932066-21-6
- Country of Publication:
- United States
- Language:
- English
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