Subject: lots of WESPs
There will be nearly 50,000 MW of scrubber installations in the next five years which will combine high quantities of sulfur with selective catalytic reduction. This will lead to an acid mist problem severe enough to require a solution. Wet precipitators (WESPs) will be an efficient solution.
Many of these plants presently have older precipitators which will not be sufficiently efficient to meet the requirements dictated by the new ambient particulate standards. The addition of a wet precipitator will provide the additional efficiency which is needed.
There is controversy over vertical versus horizontal precipitators. Another debate pits WESPs against alternative methods to remove SO3.
Another challenge is the definition of total particulate with the inclusion of condensibles. In general the WESP does better on the condensable fraction than do dry precipitators or other particulate control devices.
All the planned wet precip projects are tracked in the Utility Environmental Upgrade Tracking System http://www.mcilvainecompany.com/energy.html .
The analysis of the controversy is included in the Power Plant Knowledge System: http://www.mcilvainecompany.com/energy.html#44I .
Worldwide forecasts of both dry and wet precipitator revenues are included in Electrostatic Precipitators: World Market http://www.mcilvainecompany.com/air.html#N018
Bob McIlvaine
847-784-0012