HUBER Screenings Wash Press WAP® SL HP Washout of organics and controlled high-pressure dewatering
Reduced disposal costs with high pressure for maximum washing and dewatering results
- Dewatering performance up to 60 % DR due to hydraulic high-pressure unit
- High washout factor
- Enhancement of the thermal value of screenings
The use of highly wear-resistant and durable materials in the conical high-pressure unit ensures the reliable long-term operation of the plant.
The ROTAMAT® Screenings Wash Press SL HP operates in a batch mode. Screenings either drop into the launder tank directly from a screen or conveyor, or they are flushed into the tank through a launder channel.
After a batch of screenings has been fed, the tank is filled up with wash water and agitated for an adjustable period by means of an impeller.
Design and Function
High washout factor due to intensive washing
High turbulence and shear forces loosen and remove the organic matter from the screenings. The washing intensity is adjustable to accommodate the specific quality of the screenings. Once the washing cycle is complete, an automatic valve opens, allowing the wash water to drain through perforations in the trough. The wash water, along with the organic matter, is then returned to the wastewater flow.
The washed screenings are then conveyed into the press zone, where they are dewatered using a robust compacting screw. In the following automatically controlled second press zone, the screenings are continuously compacted and dewatered under high pressure, achieving a dry solids (DS) content of up to 60%.
The press water from the compaction process is collected beneath the high-pressure unit and discharged along with the carbon-rich wash water. Automatic cleaning with water of the press and wash water collection tank under the machine, as well as the entire high-pressure unit, is available. Finally, the washed and compacted screenings are transported through the conical discharge pipe into a skip.
The HUBER Launder Channel HLC Feed System for Screenings Wash Presses
The HUBER Launder Channel operates either discontinuously in batch mode or continuously. The screenings to be treated are fed into the launder channel from one or more screens. Wastewater or service water is used to flush the screenings into the wash press, with the flushing water also serving as wash water for the screenings. Excess transport water is returned to the system through a perforated plate.
HUBER Launder Channel (HLC) systems can be customized to meet specific customer requirements. For maximum operational reliability, the launder channel control system can be designed to incorporate redundant wash press systems, allowing individual units to be operated as needed through valve control.
Benefits of the HUBER Launder Channel Feed System
- Cost-effective, low maintenance solution
- High operational reliability
- Up to 131 ft / 40 m channel length
- Customizable discharge configurations thanks to the flexible arrangement of the launder channel
- Wastewater or service water as flushing water
- Stainless steel design for corrosion resistance
The Benefits of HUBER Screenings Wash Press WAP® SL HP
- High-intensity washing in launder tank
- Dewatering performance of up to 80 % DR
- Reduced volume, weight and disposal cost up to 85 %
- Hydraulically controlled high-pressure zone
- Return of carbon-rich filtrate to the wastewater
- Screened wastewater or process water can be used as wash water
- Resistant to coarse material
- Completely made of stainless steel (including the compacting screw)
- Compacting screw with reinforced flights for wear protection
- Increased economic efficiency through lower transport and disposal costs
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