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Fabric Filters - Hybrid Collectors

The decision to use baghouses over other particulate control devices such as ESP’s depends upon several factors. These include :

• Application
• Acidity of flue gas stream and materials being collected (ie. high sulfur coals)
• Particulate/ash resistivity
• Efficiency of collection required
• Operating temperatures
• Requirement to collect metals and toxic elements such as lead, cadmium, zinc, dioxins, HCl and mercury
• Fine particulates (PM 10, PM 2,5)

A fabric filter system is very effective at the collection of fine particulates and metals. With additional dry sorbents, air toxics such as mercury can be collected with substantially reduced injection rates of sorbents over ESP’s. Additionally when following Dry Flue Gas Desulfurization (DFGD) systems, additional SO2 capture takes place across the filter cake of the fabric which both enhances the total reduction across the system and at lower consumption rates over a DFGD and ESP system.