Ash Handling Systems

Ash handling refers to the method of collection, conveying, interim storage and load out of various types of ash residue left over from solid fuel combustion processes.

The most common types of ash resulting from the combustion of coal, wood and other solid fuels.

• bottom ash
• bed ash
• fly ash
• ash clinkers

Ash handling systems may employ different forms of pneumatic ash conveying or mechanical ash conveyors.

A typical ash handling system may employ vacuum pneumatic ash collection with ash conveying from several ash pick up stations and resulting in delivery to an ash storage silo for interim holding prior to load out for disposal or reuse. Pressurized pneumatic ash conveying may also be employed.

Coarse ash material such as bottom ash is most often crushed in clinker grinders (crushers) prior to being transported in the ash conveyor system.

Very finely sized fly ash often accounts for the major portion of the material conveyed in an ash handling system. It is collected from baghouse type dust collectors, electrostatic precipitators and other apparatus in the flue gas processing stream.

Ash mixers (conditioners) and dry dustless telescopic devices are used to prepare ash for transfer from the ash storage silo to transport vehicles.

• Pipe & Fittings
• Ash Receivers
• Double Dump Gate Airlock Valves
• Rotary Airlock Feeders
• Disc Type Ash Intake Valve
• Exhausters (Vacuum Pneumatic System)
• Blowers (Pressure Pneumatic System)
• Dust Collectors
• Ash Conditioners
• Dry Unloaders
• Clinker Grinders
• Storage Silos
• Bottom Ash Hoppers
• Computerized Controls