Types of Bottom Ash Handling Systems
Pneumatic Systems
UCC pioneered dry bottom ash handling systems using pneumatic technology. This time-proven design eliminates the need for water, while reducing unburned carbon and maintenance costs.
Vibratory Systems
The VAX Vibratory Ash Extractor is the latest evolution in dry bottom ash handling technology which delivers superior heat recovery, lower installed cost, higher reliability and less maintenance compared with conventional moving belt designs. The VAX system is the most cost-effective and rugged dry bottom ash handling system available.
Mechanical Systems
UCC has over 100 mechanical bottom ash systems worldwide. Our mechanical conveying technologies have proven to be the industry leader for performance and reliability.
Hydraulic Systems
UCC hydraulic sluice systems for bottom ash handling, transport abrasive bottom ash to a collection pond with field-proven reliability. With over 1,000 systems installed worldwide, UCC hydraulic bottom ash handling systems incorporate pumps, gates, valves and crushers designed in-house for long life, dependable service and easy maintenance.
Ash Conveyor
Ash conveyors are devices that assist in the transfer of ash from one system to another. A gigantic screw inside a tube is used in the most frequent of these conveyors. The tube has one end that is inside the ash that needs to be moved. The material is pulled up from the pile and trapped between the teeth of the screw as it rotates.
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Frequently Asked Questions
What is bottom ash handling?
What are the different types of bottom ash handling systems?
There are four primary types of bottom ash handling systems:
- Pneumatic systems – Use air pressure to transport dry ash
- Mechanical systems – Use conveyors or drag chains for heavy-duty handling
- Hydraulic systems – Use water to move ash through sluicing systems
- Vibratory systems – Use vibration to move ash while enabling heat recovery
Each system is selected based on plant design, environmental goals, and operational needs.
What is the difference between wet and dry bottom ash handling?
Wet systems use water to cool and transport ash, while dry systems rely on mechanical or pneumatic methods.
- Wet systems are traditional and widely used but require significant water usage
- Dry systems reduce water consumption, improve efficiency, and can support heat recovery
Many facilities are transitioning from wet to dry systems to meet environmental regulations and reduce operating costs.
