Fly Ash Technologies

Pugmill Recycler 

• Provides an economical way to recycle FGD water in the fly ash which is sent to the landfill for disposal
• Minimizes fugitive dust during operation by using flexible isolation curtains
• Optimal mix to avoid unabsorbed water in transport vehicle
• Overlapping paddle configuration minimizes ash buildup
• Nozzles specifically target mixing area with fine mist of water
• Easy access for routine maintenance
• Water meter and valve for precise water flow control

Vacuum System

• Uses air as transport media below atmospheric pressure to entrain and convey material
• Vacuum source is located at the discharge end of the conveying system
• Ideal for shorter transport distances (< 1500 ft)
• Safest design for indoor and hazardous environments
• Uses fewer components
• Less clearance required under hoppers
• Low initial system cost

Vacuum/Pressure Combination System

• Used for long conveying distances where vacuum system benefits are desirable in confined or hazardous locations, then transfer to pressure system for long distance
• Initial material discharge from hoppers is by a vacuum system
• Requires an intermediate collection vessel/transfer station
• Pressurized conveyance system to storage silo

Pressure System

• Can convey over longer distances (1000 to 10,000 ft
• Simpler ash/air separation equipment at the storage silo
• Airlock is required to transfer material from collecting hoppers to high pressure conveying line
• Lower cost silos and related equipment
• Lower operating costs
• Eductor-based pneumatic system available for special applications

Dense-Phase Transport System

• Variation of pressurized system but operates at higher ash-to-air ratios
• Smaller transport line sizes, for intermediate material transport rates, will often be the lowest initial and operating cost system
• Long distance conveyance, same capabilities as pressure transport systems