Product Information
As a highly efficient Internally Fed Rotary Screen, the ZG rotary drum screen is mainly used to replace traditional fine screens for high-precision solid-liquid separation. Wastewater enters from inside the rotating drum and passes through the screen mesh, while debris is trapped on the inner wall. As the drum rotates slowly, internal screw flights push the debris toward the discharge end and squeeze out moisture. This integrates screening, conveying, and pressing, significantly reducing the moisture content and disposal cost of the screen residue.
Get a QuoteInternally Fed Rotary Screen | ZG Rotary Drum Screen | Rotary Solid-Liquid Separator
Working Principle
Wastewater enters the interior of the rotating drum through the inlet at one end. Water passes through the mesh and flows out, while hair, fibers, plastics, and other suspended solids are trapped on the inner wall. Driven by a motor, the drum rotates slowly, and the internal screw flights continuously push the trapped debris toward the discharge end. During this process, the debris is washed and dewatered by squeezing before being discharged. The design of this Internally Fed Rotary Screen effectively solves the issues of frequent clogging and high moisture content found in traditional screens.
Application Fields
1.Municipal wastewater plants: using the Internally Fed Rotary Screen to replace fine screens and remove hair and fine fibers from sewage.
2.Paper and pulp industry: recovering paper fibers from wastewater to reduce downstream biological load.
3.Slaughterhouses and food processing: separating visceral residue, meat scraps, and grease from washdown water.
4.Textile and dyeing wastewater: intercepting long/short fibers and fabric scraps to prevent pipe blockages.
FAQ
Q1: What is the difference between this ZG rotary drum screen and a standard rotary bar screen?
A: A rotary bar screen is open and uses rakes to scoop debris, resulting in high moisture content and odors. This equipment is fully enclosed, and debris is squeezed and dewatered by a screw inside the drum, offering much higher separation precision and a cleaner, odor-free working environment.
Q2: Does the filter mesh clog easily?
A: No. Because of the internally fed design, the water flow matches the drum rotation, and an internal spray system effectively prevents clogging. Additionally, the internal screw flights help scrape and clean the mesh as they transport the debris.
Q3: What is the typical screen slot size?
A: The slot size is usually customized based on water quality requirements, commonly 0.5mm, 1mm, 2mm, or 3mm. Smaller slots trap finer debris but reduce hydraulic capacity. Municipal wastewater typically uses 1mm or 2mm.