Name: Rotary Drum Screen
Brand: JX Filtration

Description

JX Filtration offers a full range of rotary drum screens from compact externally fed units to high-capacity internally fed models, with flexible customization options to suit various flow rates and screening needs across municipal and industrial wastewater treatment—continuous, automated, and easy to maintain.

A rotary drum screen, also known as a rotary drum fine screen, is a mechanical screening device that uses a rotating cylindrical drum fitted with stainless steel wedge wire screen or perforated plate as the filter medium. It is widely used to separate settleable solids from liquid in municipal and industrial wastewater treatment plants. The equipment consists of a transmission device, overflow weir water distributor, flushing water device, and other major components. Available in internally fed (flow fed and distributed inside the screening cylinder) and externally fed (flow fed outside the drum) configurations, the rotary drum screen achieves continuous screening without interruption and is an economical solution for fiber recovery and wastewater pretreatment.

Working Principle

Internally Fed Type: The treated water enters the overflow weir distributor through the inlet pipe. After a short period of steady flow, it evenly overflows from the outlet and is distributed onto the filter drum that rotates in the opposite direction. The water flow generates a relative shearing motion with the inner wall of the drum, causing solid matter to be retained and separated. The retained solids tumble along the spiral guide plate inside the drum and discharge from the other end, while the filtered wastewater flows out from the tank underneath. A flushing water pipe outside the drum sprays pressure water in a fan-shaped manner to keep the filter mesh clean and maintain good filtering capability.
Externally Fed Type: As the speed-regulating motor drives the drum through a speed reducer, sewage enters the tank through the inlet valve and rises above the filtering waterline through the buffer box clapboard. Purified water passes through the grid mesh slot into the bottom of the tube and flows out. Impurities and organic matters larger than the mesh slot are blocked on the outer surface of the drum and transferred to the discharge side, where they are removed by the unloader into the slag hopper. The inverted trapezoidal section of the grid prevents slag from jamming the mesh.

Advantages

High Screening Efficiency – Fiber recovery over 80%
Continuous Automatic Operation – Fully automatic, unattended
Simple Structure – Easy maintenance, long life
Back-flushing Prevents Clogging – Clean mesh, stable capacity
Compact & Economical – Small footprint, water/power saving
Chain Transmission – Efficient, reliable
Well-distributed Water – High capacity, uniform screening
Spill-proof Plates – Prevent water splashing
Inverted Trapezoidal Grid – Slag resistant, prevents mesh clogging
Corrosion-resistant Construction – Stainless steel, harsh-duty ready

Application

Municipal domestic sewage treatment
Paper & pulp industry (fiber recovery)
Chemical sewage treatment
Textile & printing/dyeing wastewater
Food processing wastewater
Slaughterhouse & livestock wastewater
Starch & grey water treatment
Mining & mineral processing
Wastewater pretreatment & industrial screening

Materials & Connection Types

Materials: Stainless steel 304, 316, 316L, 321, 310S, duplex steel 2205/2507.

Screen Materials: Stainless steel wedge wire screen, woven wire mesh, perforated plate.

Motor Brands: Siemens, SEW.

Control Components: Schneider or Siemens control system with multi-language display.

Control System: Electrical control cabinet with outdoor anti-corrosion type, PLC-controlled automatic operation.

Key Parameters

Parameter	Range
Slot gap / Screen opening	0.02 mm – 10 mm
Drum diameter	300 mm – 3000 mm
Drum length	500 mm – 6000 mm
Flow rate	Up to 5000 m³/h
Rotation speed	4 – 20 r/min
Cleaning water pressure	0.3 – 0.6 MPa
Inlet/Outlet	DN150 – DN250 (flanged connections)