Multi-Rake Bar Screens

A Multi-Rake Bar Screen by ROCKERHILL is a heavy-duty, continuous mechanical screening device engineered for the preliminary treatment stage of water and wastewater intake. It is designed to remove large, coarse, and fibrous solids from raw water with high efficiency and reliability. Unlike single-rake screens, this system employs multiple independently operated cleaning rakes that work sequentially or in concert, enabling uninterrupted screening even during the raking cycle. This design is ideal for applications with high flow rates or substantial debris loads, providing robust protection for downstream pumps and processes.

At ROCKERHLL, we engineer our Multi-Rake Bar Screen to remove particulates from liquids, offering a superior, space-saving alternative to conventional settling tanks for primary water and wastewater treatment.

Based on different applications and special requirement from Client, ROCKERHLL customize the design and manufacture accordingly.

With ROCKERHILL patented technology, our special design of multi rake bar screen have been widely applied in many developed countries like USA, Australia, Spain, South Korea, clients including Veolia, General Dynamics, LG Chemicals.

Continuous Operation & High Availability:

The multi-rake mechanism allows one or more rakes to clean the screen bars while others continue screening, preventing debris bypass and ensuring non-stop protection of downstream equipment, even during peak flows or heavy debris events.

 

 

Superior Debris Handling Capacity:

Engineered for high flow rates and challenging conditions, it efficiently handles large volumes of diverse debris, including leaves, plastics, logs, and rags, common in municipal wastewater and large industrial intakes.

 

 

Enhanced Reliability & Reduced Maintenance:

The distributed load across multiple rakes reduces individual strain and wear. The robust construction and premium components minimize mechanical stress, leading to higher reliability and lower long-term maintenance costs.

 

 

Fully Automated & Intelligent Control:

Equipped with a sophisticated Programmable Logic Controller (PLC), operation can be triggered by timed intervals, differential water level, or a combination of both, optimizing energy use and cleaning frequency.

 

 

Durable Construction for Harsh Environments:

Fabricated from corrosion-resistant materials such as stainless steel (304/316) for critical components and heavy-duty carbon steel with protective coatings, ensuring longevity in corrosive and abrasive environments.

The screen's performance is built upon its integrated heavy-duty components:

 

 

Screen Basket & Bars:

A rigid framework of parallel vertical or inclined bars with a user-defined clear spacing (typically 15-50 mm). Bars are often shaped to minimize clogging and are made from stainless steel for durability.

 

 

Multiple Raking Assemblies:

Two or more cleaning rakes, each with robust teeth designed to engage and lift debris from the entire screen depth. Each rake operates on its own drive chain or guide system.

 

 

Independent Drive System:

Each rake is powered by its own rugged, top-mounted gear motor system, allowing for independent and flexible operation. Systems often include a shear-pin or torque limiter for overload protection.

 

 

Debris Conveyance System:

A cleated conveyor or flight mechanism, synchronized with the rakes, transports the captured debris from the discharge point to a collection hopper or container for disposal.

 

 

Robust Main Frame & Covers:

A structural steel frame provides a solid foundation. Full-length covers contain splash, reduce odor escape (in wastewater applications), and enhance safety.

Municipal Wastewater Treatment Plants: As the primary screen at the headworks of large-capacity plants, protecting pumps, grit removers, and downstream processes.

Large Industrial Water Intakes: For power plants, paper mills, and other industries drawing large volumes of surface water, preventing damage to cooling water systems and process equipment.

Combined Sewer Overflow (CSO) & Stormwater Management: Effectively handling the highly variable and often substantial debris loads encountered during storm events.

Pump Station Protection: Installed in front of main intake pumps in large-scale municipal or industrial pumping stations to prevent clogging and impeller damage.

In summary, the ROCKERHILL Multi-Rake Bar Screen represents the pinnacle of reliability and capacity in coarse mechanical screening. Its intelligent multi-rake design guarantees uninterrupted protection for critical downstream assets, making it the system of choice for large-scale, mission-critical water and wastewater intake facilities. By combining heavy-duty construction, independent automated operation, and superior debris handling, ROCKERHILL delivers a screening solution that maximizes uptime, minimizes operational risk, and provides a robust foundation for the entire treatment process.

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