Mercury Removal
Amended Silicates is injected into coal combustion gases upstream of the Spray Dryer Absorber (SDA). Amended Silicates interacts with the mercury, chemically modifying it into an inert and insoluble state. Injection rates are comparable to Powdered Activated Carbon but will vary from plant to plant based upon variables such as coal type, LOI and baghouse temperature.
Balance of Plant Impact
As a non-carbon, silicate based reagent, Amended Silicates has similar physical and chemical properties to fly ash itself. There is no evidence of buildup, erosion or any other potential impacts when using Amended Silicates.
Baghouse
Novinda has researched the impact of Amended Silicates on various bag types. As a non-carbon, silicate based reagent, Amended Silicates has similar physical and chemical properties to fly ash itself. To date, no evidence of blinding, buildup or any other adverse potential impacts have been observed.
Preserves Fly Ash Value
At this time, introduction of lime for sulfur control makes fly ash unusable as a replacement for portland cement. Amended Silicates does not further contaminate the fly ash, thereby preserving it for use in other markets and potential use as a portland cement replacement sometime in the future.
Superior Handling Characteristics
As a non-carbon based product, Amended Silicates is non-flammable and non-abrasive – important considerations when choosing a mercury emission control technology. Additionally, Amended Silicates has similar physical and chemical properties to fly ash and has not been observed to produce any noxious or corrosive off-gases. These attributes make Amended Silicates easy to store and handle.
Leachability
Tests have shown that mercury contained within the Amended Silicates-fly ash mixture is very stable and able to meet stringent
EPA leachability standards.
