Fully Sealed High Drainage Screw Press for Volume Reduction in Sewage Sludge

The YGP High-Drainage Screw Press is engineered to dewater and compact solid waste using a variable-pitch screw mechanism. As the screw conveys material forward, the progressively decreasing pitch generates increasing compression, effectively removing excess water and lowering the moisture content of discharged solids.

By reducing the volume and weight of screenings, the equipment simplifies handling, transport, and disposal. It also minimizes secondary water contamination caused by residual moisture in the discharged material.

A perforated screen basket in the dewatering and compaction zone delivers superior drainage capacity, filtration performance, and dewatering efficiency compared with conventional screw presses. The unit is particularly well suited for installation downstream of screening equipment equipped with flushing systems, such as internally fed rotary drum screens and perforated plate screens.

The YGP High-Drainage Screw Press mainly consists of a supporting frame, drive unit, screw shaft with variable-pitch flights, perforated screen basket, compaction and discharge pipe, feed inlet, water collection tank, and drainage channel.

Driven by the motor and gearbox, the screw rotates continuously in a designated direction, conveying incoming screenings while progressively compressing them. As the material moves forward, the decreasing screw pitch increases the compression force, effectively separating water from the solid waste.

During operation, separated wastewater passes through the perforated screen basket and flows into the collection tank at the bottom of the machine before being discharged through the drainage outlet. The dewatered and compacted solids are conveyed through the discharge pipe and expelled from the outlet.

The screw flights extend through the conveying and compression sections, with screw geometry and compression length optimized to ensure sufficient dewatering before discharge. This design has been validated through years of practical operation.

For demanding operating conditions, an optional spray cleaning system can be installed to automatically flush the screen basket and prevent material accumulation.

The perforated screen basket design provides significantly improved filtration, drainage, and dewatering performance compared with conventional screw presses, making the equipment particularly suitable for applications involving upstream screening and flushing systems.

1. 1 Robust and Reliable Construction Rigid structural design ensures stable operation while minimizing leakage, material accumulation, and clogging.
2. 2 High-Efficiency Dewatering System The perforated screen basket provides excellent filtration and drainage performance, delivering higher dewatering efficiency than conventional screw presses.
3. 3 High-Torque Gear Drive Equipped with a high-performance geared motor, the machine delivers high output torque, low operating noise, reliable sealing, and long service life.
4. 4 Enclosed Design for Cleaner Operation Except for the material inlet and discharge outlets, the machine features an enclosed structure to prevent screenings and unpleasant odors from escaping into the surrounding environment.
5. 5 Overload Protection An integrated overload protection system helps prevent equipment damage caused by excessive loads. Audible and visual alarms are provided to alert operators in the event of equipment malfunctions.
6. 6 Automatic and Continuous Operation High automation, efficient material conveying, low energy consumption, reduced operating noise, and minimal maintenance requirements enable reliable continuous operation with minimal operator intervention.
7. 7 Easy Installation and Retrofit The compact design allows installation without major modifications to existing civil structures, making it an ideal solution for upgrading or replacing existing screening and dewatering equipment.

• Superior drainage and dewatering performance compared with conventional screw presses.
• Ideal for installation downstream of screening equipment equipped with flushing systems.
• Effectively collects and drains separated wastewater, helping prevent wastewater overflow and leakage.
• Enclosed construction minimizes the escape of screenings and unpleasant odors, helping reduce secondary environmental pollution.
• Compact footprint with convenient installation, operation, and maintenance.
• Optional spray cleaning system available for improved operational reliability.