Pressure fly ash conveying is the system often specified for new installations to transfer moderate to large amounts of material to storage / loadout facilities at remote locations of the plant.

View the system diagram below to see the components comprising the pressure conveying system. A rotary screw compressor produces transfer air to supply pressure feeder vessels and the conveying line. Automatic hopper valves open in sequence allowing fly ash to fall into a pressure feeder vessel under each hopper.

The pressure conveying pipeline extends to the vertical riser pipe on the silo which delivers fly ash to the roof mounted inlet box. Transfer air is run through a coalescing filter. Each row of pressure vessels can be transferred into the branch line simultaneously permitting efficient transfer with fewer valves.

Top discharge feeders force material into the line ahead of the transport air making for a high solids-to-air ratio. Dense phase conveying means higher transfer rates and lower velocities. This helps reduce wear to fittings in the system.