Energy-Efficient 304 Stainless Steel Rotary Drum Screen

Energy-Efficient 304 Stainless Steel Rotary Drum Screen

Category： Externally Fed Drum Screen
Drive Mechanism: Heavy-Duty Gear Motor
Flow Capacity: Up to 5000 m³/day
Spray Water System: High-Pressure Nozzles Included
Installation: Channel Mounted, Pre-assembled Unit
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Externally fed drum screen description

The Externally Fed Rotary Drum Screen is a reliable self-cleaning wedge wire screen for industrial wastewater operations. This screening technology performs particularly well in wastewater with high oil or grease loadings as well as scum applications that can blind other types of screens. It is used for fine screening primary sewage influent at the headworks as well as screening of clarifier scum.

The Externally Fed Rotary Drum Screen is constructed of slotted stainless wedge wire formed into a cylindrical drum that rotates on two pillow block bearings. The screen typically has openings ranging from 0.100 to 0.010 inches and features 100% overflow protection from blinding for flows up to 5.0 mgd.

Externally fed drum screen provides advanced solids removal for wastewater treatment, specifically designed for municipal and industrial facilities.

Its durable stainless steel structure and automatic self-cleaning mechanism offer reliable, low-maintenance performance, effectively handling solids separation under demanding conditions.

Influent flows evenly across the rotating drum surface, capturing solids on the exterior screen while filtered water passes through.

Continuous drum rotation and internal spray cleaning prevent clogging, delivering uninterrupted operation.

The compact, enclosed design minimizes odor, reduces maintenance needs, and optimizes overall treatment efficiency.

Externally fed drum screen function

Separation of Solids from Liquid: The primary function of externally fed rotary drum screens is to separate solid particles from a liquid stream. This is particularly important in wastewater treatment plants where the goal is to remove solid contaminants from sewage or industrial wastewater before it can be discharged or further treated.

Screening and Filtration: As the liquid flows into the drum screen, the solid particles and debris are captured on the surface of the rotating drum due to the perforations or slots. The size of these openings can be customized based on the specific requirements of the application. Larger openings allow larger particles to pass through, while smaller openings capture finer solids.

Continuous Operation: One of the advantages of externally fed rotary drum screens is that they can operate continuously. The rotation of the drum ensures a continuous screening process, making them suitable for applications where a constant flow of liquid needs to be processed.

Self-Cleaning Mechanism: To prevent clogging and maintain efficient operation, many rotary drum screens are equipped with a self-cleaning mechanism. This mechanism typically involves brushes or spray nozzles that clean the drum’s surface as it rotates, dislodging and removing accumulated solids.

Efficient Solids Removal: Rotary drum screens are known for their efficiency in removing solids from liquid streams. They are often used as a preliminary treatment step in wastewater treatment plants to protect downstream processes and equipment from damage or contamination.

Variability in Design: Externally fed rotary drum screens come in various designs, including different drum configurations, materials, and sizes. The choice of design depends on factors such as the type of solids being removed, the flow rate of the liquid, and the specific requirements of the application.

Overall, externally fed rotary drum screens play a crucial role in the treatment and purification of liquid streams by effectively separating solid contaminants, improving water quality, and protecting downstream processes and equipment.

Externally fed drum screen model

Industry Type	Slot (mm)	RDS03/300	RDS06/400	RDS06/700	RDS06/1000	RDS06/1300	RDS06/1600	RDS08/2000	RDS08/2500
Paper Industry	0.5	6	20	40	60	80	100	130	190
Slaughter House	0.5	4	15	30	45	60	75	95	130
Seafood Industry	0.75	5	17	35	50	70	90	110	140
Meat Industry	0.75	6	20.5	40	60	80	100	130	190
Meat Industry	1.0	7.5	25	50	75	100	125	150	220
Vegetable Industry	1.0	12	40	75	110	150	180	220	330

Externally fed drum screen advantage

High Filtration Efficiency

Effectively removes fine particles (down to 10-50 microns) from water, ensuring high-quality filtrate.

Continuous Automated Operation

Rotary drum design allows continuous filtration without interruptions, reducing manual labor.

Low Energy Consumption

Operates with minimal power due to its simple mechanical structure and efficient water flow.

Self-Cleaning Function

Automatic backwashing or brushing systems prevent clogging, maintaining consistent performance.

Space-Saving Design

Compact size and vertical drum configuration make it suitable for limited installation spaces.

Durable Construction

Built with corrosion-resistant materials (e.g., stainless steel) for long-term reliability in harsh environments.

Adaptable to Various Water Types

Works well in industrial wastewater, aquaculture, municipal sewage, and stormwater applications.

Cost-Effective Maintenance

Reduced downtime and easy access to components simplify repair and replacement.

Environmentally Friendly

Low water and chemical usage in backwashing processes align with sustainable practices.

Customizable Performance

Adjustable drum speed and filter mesh sizes meet specific operational requirements.

Externally fed drum screen feature

1. Durable & Space-Saving Design:

Made of high-strength, corrosion-resistant stainless steel. Requires minimal installation space and no channel construction. Can be fixed directly with expansion bolts; inlet and outlet can be easily connected via pipes.

2. Non-Clogging Performance:

The inverted trapezoidal cross-section of the screen prevents blockages caused by solid waste.

3. Smart Operation:

Equipped with a variable-speed motor that adjusts automatically to water flow, maintaining optimal working conditions.

4. Self-Cleaning System:

Features a specialized dual-brush cleaning system and external washing device, ensuring thorough cleaning and consistent screening efficiency.