Mist Eliminators Will be the Subject of the Hot Topic Hour on Thursday, March 18, 2010
Mist eliminators are an essential component of the air pollution control equipment train at most power plants and they may well become even more important in the future with tightening PM2.5 emission regulations. It is also very probable that all plants will face a MACT requiring a 90 percent reduction in mercury, SO3 and other air toxics and that fine particulates will be a surrogate for air toxics. Mist eliminators could be a big factor in meeting these new regulations. Properly designed mist eliminators can capture droplets and the entrained pollutants as small as 1 micron and return them to the wastewater or scrubber solution.
Mist eliminators are available in three basic types: mesh, vane and fiber beds, but there are many variations in each of these basic designs. There is no one size fits all. The selection of the correct mist eliminator for a specific plant depends on the velocity and mass of the gas flow, particulate load, average droplet size, corrosive and abrasive characteristics of the gas and the emissions allowed among other factors. Maintenance requirements, due primarily to plugging or caking of solid matter on the eliminator, is a big consideration. Proper collection and drainage of liquids to avoid re-entrainment of droplets should also be considered.
Mist eliminators are available constructed of a wide variety of materials and the material selected should be based on the corrosive and abrasive characteristics of the gas stream as well as cost of the equipment. Pressure drop is also a significant design issue since this will directly impact the operating cost as well as the flow velocity achievable. We are looking for speakers to discuss how mist eliminators will fit into the future emission control equipment at power plants and how important are mist eliminators in meeting total particulate and emission guarantees?
The following speakers will address how to select the best mist eliminator for a specific plant configuration considering collection efficiency as well as installed and operating costs.
Kanti Patel, Engineering Manager, Separations & Mass-Transfer Products, ACS Industries, LP, Separations Division, will introduce ACS Industries and discuss the need for mist eliminators, types of mist eliminators available and their proper application as well as design and troubleshooting issues.
Erik Reese, Munters Corp. Dehumidification Division, will discuss design considerations for typical FGD scrubber mist elimination systems. His presentation will cover the typical types of mist eliminators based on the orientation of the gas flow, location of retrofit within a tower, efficiency specifications, design and operating gas velocities and gas temperatures, space considerations and support structure requirements and maintenance issues including water wash capacity.
Brian Baleno, Solvay Advanced Polymers, LLC
To register for the “Hot Topic Hour” on March 18, 2010 at 10 a.m. CDT (Chicago time), click on: http://www.mcilvainecompany.com/brochures/FGDnetoppbroch/Default1.htm.
Bob McIlvaine
President
847 784 0012 ext 112
rmcilvaine@mcilvainecompany.com